1
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Chen K, Zhang M, Bhandari B, Deng D. 3D printed cinnamon essential oil/banana peel carbon dots loaded corn starch/gelatin bilayer film with enhanced functionality for food packaging application. Food Chem 2024; 448:139176. [PMID: 38574719 DOI: 10.1016/j.foodchem.2024.139176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 03/03/2024] [Accepted: 03/27/2024] [Indexed: 04/06/2024]
Abstract
Using 3D printing technology, a gelatin-polyvinyl alcohol‑carbon dots (GPC) layer+corn starch-polyvinyl alcohol-cinnamon essential oil (CPC) layer active bilayer film with an external barrier function and an internal controlled-release effect was successfully produced for food preservation. The GPC film was provided with potent antioxidant and UV blocking properties by the banana peel carbon dots (CDs). The cinnamon essential oil (CEO) had the strongest interaction with the film matrix at 3% (w/w), causing the CPC film having the lowest surface wettability, good integrity, and lowest crystallinity. The CEO's stability and releasing effectiveness were greatly enhanced by the creation of a bilayer film. At 60% filling rate of the CPC layer, the bilayer film showed the highest CEO retention after drying and the best CEO release performance. Finally, the created active bilayer film was found to significantly improve the sensory quality stability of the spicy essential oil microcapsule powders. It also successfully extended the mangoes' shelf life by delaying browning and rot.
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Affiliation(s)
- Kai Chen
- State Key Laboratory of Food Science and Resources, Jiangnan University, 214122 Wuxi, Jiangsu, China; Jiangsu Province International Joint Laboratory on Fresh Food Smart Processing and Quality Monitoring, Jiangnan University, 214122 Wuxi, Jiangsu, China
| | - Min Zhang
- State Key Laboratory of Food Science and Resources, Jiangnan University, 214122 Wuxi, Jiangsu, China; China General Chamber of Commerce Key Laboratory on Fresh Food Processing & Preservation, Jiangnan University, 214122 Wuxi, Jiangsu, China.
| | - Bhesh Bhandari
- School of Agriculture and Food Sustainability, University of Queensland, Brisbane, QLD, Australia
| | - Dewei Deng
- Zhengzhou Xuemailon Food Flavor Co. R & D center, Zhengzhou, Henan, China
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2
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Wang M, Zhou Y, Fan L, Li J. Stabilization of all-natural water-in-oil high internal phase pickering emulsion by using diosgenin/soybean phosphatidylethanolamine complex: Characterization and application in 3D printing. Food Chem 2024; 448:139145. [PMID: 38555692 DOI: 10.1016/j.foodchem.2024.139145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 03/20/2024] [Accepted: 03/24/2024] [Indexed: 04/02/2024]
Abstract
This study aimed to prepare an all-natural water-in-oil high internal phase Pickering emulsion (W/O-HIPPE) using diosgenin/soybean phosphatidylethanolamine complex (DGSP) and investigate the 3D printing performance. Results suggested that the self-assembly of diosgenin crystal was modified by SP in DGSP (diosgenin-SP ratios at 3:1 and 1:1), revealing a variation from large-size outward radiating needle-like to small-size granular-like shape, which facilitated closely packing at the interface. Hydrophilicity of DGSP was also increased (contact angle varying from 133.3 o to 106.4 o), ensuring more adequate interfacial adsorption to reduce interfacial tension more largely (6.5 mN/m). Thus, the W/O-HIPPE made by DGSP with diosgenin-SP = 1:1, exhibited smaller droplets and better freeze/thawing stability. The W/O-HIPPE was also measured improved rheological properties for 3D printing: satisfied shear-thinning behavior, higher recovery and self-supporting (viscoelasticity and deformation resistance). Consequently, the W/O-HIPPE allowed for printing more delicate patterns. This work provided guidance to prepare W/O-HIPPE for 3D printing.
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Affiliation(s)
- Mengzhu Wang
- State Key Laboratory of Food Science and Recourse, Jiangnan University, Wuxi 214122, China
| | - Yulin Zhou
- State Key Laboratory of Food Science and Recourse, Jiangnan University, Wuxi 214122, China
| | - Liuping Fan
- State Key Laboratory of Food Science and Recourse, Jiangnan University, Wuxi 214122, China; Guangxi Key Laboratory of Health Care Food Science and Technology, Hezhou University, Hezhou 542899, China.
| | - Jinwei Li
- State Key Laboratory of Food Science and Recourse, Jiangnan University, Wuxi 214122, China.
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3
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Yin Y, Wang Y, Fang Q, Xiang M, Zhao X, Xu X, Li C. Effects of pre-formulation and post-cooking method on the rheological and gelation properties of 3D printed chicken products. Food Chem 2024; 446:138857. [PMID: 38452503 DOI: 10.1016/j.foodchem.2024.138857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 02/05/2024] [Accepted: 02/24/2024] [Indexed: 03/09/2024]
Abstract
This study investigated the influence of oil type (olive, soybean, and peanut oil) and post-cooking methods (oven bake and microwave) on the quality of 3D printed chicken meat products. The Ostwald-de-Waele model was used to describe the flow behavior of chicken meat paste (R2 > 0.995). Oil-fortified groups present significantly lower consistency index (K) and flow behavior index (n), indicating better fluidity. A modified Cox-Merz rule was applied by multiplying angular frequency with shift factors (αSF). Surprisingly, the values of αSF are well-correlated with accuracy parameters of 3D printed cubes (|r| >0.8). For post-heating methods, baking results in higher fluid loss but contributes to a smoother surface. The microwaved gels showed better fluid retention ability and higher accuracy but lost the detail shape of the 3D printing model. Overall, the PO (peanut oil) meat emulsion group presented better textural properties and flat surfaces than other oil-added counterparts.
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Affiliation(s)
- Yexi Yin
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Yue Wang
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Qingqing Fang
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Mingyu Xiang
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Xue Zhao
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China; State Key Laboratory of Meat Processing and Quality Control, Yurun Group, Nanjing 211806, China.
| | - Xinglian Xu
- State Key Laboratory of Meat Quality Control and Cultured Meat Development, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
| | - Chao Li
- State Key Laboratory of Meat Processing and Quality Control, Yurun Group, Nanjing 211806, China
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4
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Yu L, Sun F, Wang Y, Li W, Zheng Y, Shen G, Wang Y, Chen M. Effects of MgO nanoparticle addition on the mechanical properties, degradation properties, antibacterial properties and in vitro and in vivo biological properties of 3D-printed Zn scaffolds. Bioact Mater 2024; 37:72-85. [PMID: 38523703 PMCID: PMC10958222 DOI: 10.1016/j.bioactmat.2024.03.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 02/29/2024] [Accepted: 03/11/2024] [Indexed: 03/26/2024] Open
Abstract
Bone tissue engineering is the main method for repairing large segment bone defects. In this study, a layer of bioactive MgO nanoparticles was wrapped on the surface of spherical Zn powders, which allowed the MgO nanoparticles to be incorporated into 3D-printed Zn matrix and improved the biodegradation and biocompatibility of the Zn matrix. The results showed that porous pure Zn scaffolds and Zn/MgO scaffolds with skeletal-gyroid (G) model structure were successfully prepared by selective laser melting (SLM). The average porosity of two porous scaffolds was 59.3 and 60.0%, respectively. The pores were uniformly distributed with an average pore size of 558.6-569.3 μm. MgO nanoparticles regulated the corrosion rate of scaffolds, resulting in a more uniform corrosion degradation behavior of the Zn/MgO scaffolds in simulated body fluid solution. The degradation ratio of Zn/MgO composite scaffolds in vivo was increased compared to pure Zn scaffolds, reaching 15.6% at 12 weeks. The yield strength (10.8 ± 2.4 MPa) of the Zn/MgO composite scaffold was comparable to that of cancellous bone, and the antimicrobial rate were higher than 99%. The Zn/MgO composite scaffolds could better guide bone tissue regeneration in rat cranial bone repair experiments (completely filling the scaffolds at 12 weeks). Therefore, porous Zn/MgO scaffolds with G-model structure prepared with SLM are a promising biodegradable bone tissue engineering scaffold.
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Affiliation(s)
- Leiting Yu
- School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Fengdong Sun
- School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Yuanyuan Wang
- School of Stomatology, Tianjin Medical University, Tianjin, 300070, China
| | - Wei Li
- School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China
| | - Yufeng Zheng
- School of Materials Science and Engineering, Peking University, Beijing, 100871, China
| | - Guangxin Shen
- Changzhi Medical College, Changzhi, 046000, Shanxi, China
| | - Yao Wang
- School of Stomatology, Tianjin Medical University, Tianjin, 300070, China
| | - Minfang Chen
- School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300384, China
- National Demonstration Center for Experimental Function Materials Education, Tianjin University of Technology, Tianjin, 300384, China
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5
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Santos DJAD, Oliveira TRD, Araújo GMD, Pott-Junior H, Melendez ME, Sabino EC, Leite OD, Faria RC. An electrochemical genomagnetic assay for detection of SARS-CoV-2 and Influenza A viruses in saliva. Biosens Bioelectron 2024; 255:116210. [PMID: 38537427 DOI: 10.1016/j.bios.2024.116210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2023] [Revised: 02/28/2024] [Accepted: 03/11/2024] [Indexed: 04/15/2024]
Abstract
Viral respiratory infections represent a major threat to the population's health globally. Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) causes COVID-19 disease and in some cases the symptoms can be confused with Influenza disease caused by the Influenza A viruses. A simple, fast, and selective assay capable of identifying the etiological agent and differentiating the diseases is essential to provide the correct clinical management to the patient. Herein, we described the development of a genomagnetic assay for the selective capture of viral RNA from SARS-CoV-2 and Influenza A viruses in saliva samples and employing a simple disposable electrochemical device for gene detection and quantification. The proposed method showed excellent performance detecting RNA of SARS-CoV-2 and Influenza A viruses, with a limit of detection (LoD) and limit of quantification (LoQ) of 5.0 fmol L-1 and 8.6 fmol L-1 for SARS-CoV-2, and 1.0 fmol L-1 and 108.9 fmol L-1 for Influenza, respectively. The genomagnetic assay was employed to evaluate the presence of the viruses in 36 saliva samples and the results presented similar responses to those obtained by the real-time reverse transcription-polymerase chain reaction (RT-PCR), demonstrating the reliability and capability of a method as an alternative for the diagnosis of COVID-19 and Influenza with point-of-care capabilities.
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Affiliation(s)
| | | | | | - Henrique Pott-Junior
- Department of Medicine, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil
| | | | - Ester Cerdeira Sabino
- Institute of Tropical Medicine, Faculty of Medicine, University of São Paulo, São Paulo, SP, 05403-000, Brazil
| | - Oldair Donizeti Leite
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil; Federal Technological University of Paraná, Campus Medianeira, Medianeira, PR, 85884-000, Brazil.
| | - Ronaldo Censi Faria
- Department of Chemistry, Federal University of São Carlos, São Carlos, SP, 13565-905, Brazil.
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6
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Zheng Y, Zhang H, Wang Z, Lu A, Yu A, Duan B. Chitin nanofibrils assisted 3D printing all-chitin hydrogels for wound dressing. Carbohydr Polym 2024; 334:122028. [PMID: 38553227 DOI: 10.1016/j.carbpol.2024.122028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 03/02/2024] [Accepted: 03/05/2024] [Indexed: 04/02/2024]
Abstract
The direct ink writing technique used in 3D printing technology is generally applied to designing biomedical hydrogels. Herein, we proposed a strategy for preparing all-chitin-based inks for wound dressing via direct ink writing technique. The β-chitin nanofibers (MACNF) with a high aspect ratio were applied as a nanofiller to modulate the rheological properties of the alkaline dissolved chitin solution. The printing fidelity significantly depends on the MACNF introduction amount to the composite ink. 5-10 wt% MACNF ratio showed superior printing performance. The printed scaffold showed a uniform micron-sized pore structure and a woven network of nanofibers. Due to the good biocompatibility of chitin and the stereoscopic spatial skeleton, this scaffold showed excellent performance as a wound dressing, which can promote cell proliferation, collagen deposition and the angiogenesis of wounds, demonstrating its potential in biomedical applications. This approach successfully balanced the chitinous printability and biofunctions.
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Key Words
- 3D printing
- Ammonium hydroxide aqueous solution (NH(4)OH, AR, PubChem CID: 14923)
- Chitin
- Dimethyl sulfoxide (DMSO, AR, PubChem CID: 679), potassium hydroxide (KOH, AR, PubChem CID: 14797)
- Ethanol absolute (C(2)H(6)O, AR, PubChem CID: 702)
- Hydrochloric acid (HCl, AR, PubChem CID: 313)
- Hydrogen peroxide 30 % aqueous solution (H(2)O(2), AR, PubChem CID: 784)
- Maleic anhydride (C(4)H(2)O(3), AR, PubChem CID: 7923)
- Poly (ethylene glycol)-20000 (PEG20000, AR, PubChem SID:473052978)
- Sodium hydroxide (NaOH, AR, PubChem CID: 14798)
- Wound dressing
- tert-Butanol (AR, PubChem CID: 6386)
- β-Chitin nanofiber
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Affiliation(s)
- Yiran Zheng
- College of Chemistry and Molecular Science, Hubei Engineering Center of Natural Polymer-based Medical Materials, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, PR China
| | - Hao Zhang
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, PR China
| | - Zhiwei Wang
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, PR China
| | - Ang Lu
- College of Chemistry and Molecular Science, Hubei Engineering Center of Natural Polymer-based Medical Materials, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, PR China.
| | - Aixi Yu
- Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, PR China.
| | - Bo Duan
- College of Chemistry and Molecular Science, Hubei Engineering Center of Natural Polymer-based Medical Materials, Key Laboratory of Biomedical Polymers of Ministry of Education, Wuhan University, Wuhan 430072, PR China; Interdisciplinary Institute of NMR and Molecular Sciences, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, PR China.
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7
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Thompson C, Domínguez G, Bardisa P, Liu Y, Fernández-Blázquez JP, Del Río JS, Echeverry-Rendon M, González C, Llorca J. Medical grade 3D printable bioabsorbable PLDL/Mg and PLDL/Zn composites for biomedical applications. J Biomed Mater Res A 2024; 112:798-811. [PMID: 38146214 DOI: 10.1002/jbm.a.37660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 11/13/2023] [Accepted: 12/12/2023] [Indexed: 12/27/2023]
Abstract
Medical grade PLDL, PLDL/Mg and PLDL/Zn filaments were manufactured by a dual extrusion method and used to prepare coupons and scaffolds with controlled porosity by fused filament fabrication. The mechanical properties, degradation mechanisms and biological performance were carefully analyzed. It was found that the presence of 4 vol.% of Mg and Zn particles did not substantially modify the mechanical properties but accelerated the degradation rate of PLDL. Moreover, the acidification of the pH due to degradation of the PLDL was reduced in the presence of metallic particles. Finally, cell adhesion and proliferation were excellent in the medical grade PLDL as well as in the polymer/metal composites. These results demonstrate the potential of bioabsorbable metal/polymer composites to tailor the mechanical properties, degradation rate and biocompatibility for specific clinical applications.
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Affiliation(s)
- Cillian Thompson
- IMDEA Materials Institute, Getafe, Spain
- Department of Material Science and Engineering, Universidad Carlos III de Madrid, Leganés, Spain
| | - Guillermo Domínguez
- IMDEA Materials Institute, Getafe, Spain
- Department of Material Science, Polytechnic University of Madrid/Universidad Politécnica de Madrid, Madrid, Spain
| | - Pilar Bardisa
- Departamento de Ingeniería Eléctrica, Electrónica, Automática y Física Aplicada, Universidad Politécnica de Madrid, Madrid, Spain
| | - Yuyao Liu
- IMDEA Materials Institute, Getafe, Spain
- Department of Material Science, Polytechnic University of Madrid/Universidad Politécnica de Madrid, Madrid, Spain
| | | | - José Sánchez Del Río
- Departamento de Ingeniería Eléctrica, Electrónica, Automática y Física Aplicada, Universidad Politécnica de Madrid, Madrid, Spain
| | | | - Carlos González
- IMDEA Materials Institute, Getafe, Spain
- Department of Material Science, Polytechnic University of Madrid/Universidad Politécnica de Madrid, Madrid, Spain
| | - Javier Llorca
- IMDEA Materials Institute, Getafe, Spain
- Department of Material Science, Polytechnic University of Madrid/Universidad Politécnica de Madrid, Madrid, Spain
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8
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Wells KCDH, Kharma N, Jaunky BB, Nie K, Aguiar-Tawil G, Berry D. BioCloneBot: A versatile, low-cost, and open-source automated liquid handler. HardwareX 2024; 18:e00516. [PMID: 38524156 PMCID: PMC10955647 DOI: 10.1016/j.ohx.2024.e00516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 02/03/2024] [Accepted: 02/25/2024] [Indexed: 03/26/2024]
Abstract
Liquid handler systems can provide significant benefits to researchers by automating laboratory work, however, their unaffordable price provides a steep barrier to entry. Therefore, we provide the BioCloneBot, a versatile, low-cost, and open-source automated liquid handler. This system can be easily built with 3D-printed parts and readily available commercial components. The BioCloneBot is highly adaptive to user needs and facilitates various liquid handling tasks in research and diagnostics. Its user-friendly interface and programmable nature make it suitable for a wide range of applications, from small-scale experiments to larger laboratory setups. By utilizing BioCloneBot, researchers and scientists can streamline their liquid handling processes without the financial constraints posed by traditional systems. In this paper, we detail the design, construction, and validation of BioCloneBot, showcasing its precise control, accuracy, and repeatability in various liquid handling tasks. The open-source nature of the system encourages collaboration and customization, enabling researchers to contribute and adapt the technology to specific experimental requirements.
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Affiliation(s)
- Ke’Koa CDH Wells
- Department of Electrical and Computer Engineering, Concordia University, Montréal, Québec, Canada
| | - Nawwaf Kharma
- Department of Electrical and Computer Engineering, Concordia University, Montréal, Québec, Canada
- Department of Biology, Concordia University, Montréal, Québec, Canada
| | - Brandon B. Jaunky
- Department of Biology, Concordia University, Montréal, Québec, Canada
| | - Kaiyu Nie
- Department of Electrical and Computer Engineering, Concordia University, Montréal, Québec, Canada
| | | | - Daniel Berry
- Department of Mechanical, Industrial and Aerospace Engineering, Concordia University, Montréal, Québec, Canada
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9
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Yu S, Ma L, Gao Y, Zheng H, Hu X, Liu R, Shi Y, Yin W. Effects of fissure length and angle on the fracture modes of 3D printed teeth model: Insights from DIC-based fracture tests and meshless numerical simulations. J Mech Behav Biomed Mater 2024; 154:106512. [PMID: 38554582 DOI: 10.1016/j.jmbbm.2024.106512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 03/13/2024] [Accepted: 03/19/2024] [Indexed: 04/01/2024]
Abstract
To investigate the influences of teeth fissure properties on their failure modes, 3D Printing technology is used to prepare the teeth models. The strain distributions of the teeth model surfaces at each moment of the loading processes are obtained by the DIC technique. And the progressive failure processes as well as the stress distributions of the teeth models are simulated by the improved Smoothed Particle Hydrodynamics (SPH) Method. Experimental results show that under the action of the steel ball, the teeth models mainly produce two types of cracks: The tensile cracks along the pre-existing fissures and the shear cracks along both sides of the teeth model. The existence of prefabricated fissures greatly reduces the peak strength of the teeth models. Compared with the circumstances containing no pre-existing fissures, the peak strength of d = 1 cm, d = 2 cm and d = 3 cm decreases by 22.33%, 31.79% and 18.94%, respectively, and the peak strength of θ = 30°, θ = 45°, θ = 60° decreases by 10.78%, 44.01% and 34.3%, respectively. Numerical results show that the initiations of tensile cracks are induced by the high tensile stress concentrations at the pre-existing fissure tips, while the shear cracks are caused by the high tensile stress concentrations in the low tensile stress concentration areas after the initiation of tensile cracks. The research results can provide some references for the understandings of teeth failure mechanisms as well as the applications of SPH method into teeth crack propagation simulations.
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Affiliation(s)
- Shuyang Yu
- School of Transportation and Civil Engineering, Nantong University, Nantong, 226019, China
| | - Li Ma
- Nanjing Health Information Center, Nanjing, 210003, China
| | - Yuan Gao
- School of Transportation and Civil Engineering, Nantong University, Nantong, 226019, China
| | - Hao Zheng
- Nanjing Stomatological Hospital Medical School of Nanjing University, Nanjing, 210008, China
| | - Xueying Hu
- School of Transportation and Civil Engineering, Nantong University, Nantong, 226019, China
| | - Runyu Liu
- School of Transportation and Civil Engineering, Nantong University, Nantong, 226019, China
| | - Yue Shi
- School of Transportation and Civil Engineering, Nantong University, Nantong, 226019, China
| | - Weidong Yin
- Nanjing Health Information Center, Nanjing, 210003, China.
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10
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Wang Y, Yang Y, Xu L, Qiu C, Jiao A, Jin Z. Rheology and stability mechanism of pH-responsive high internal phase emulsion constructed gel by pea protein and hydroxypropyl starch. Food Chem 2024; 440:138233. [PMID: 38142551 DOI: 10.1016/j.foodchem.2023.138233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 12/01/2023] [Accepted: 12/16/2023] [Indexed: 12/26/2023]
Abstract
There is an increasing demand for stable, highly viscoelastic, and printable emulsion gels based on pea protein (PeaP) as a substitute for animal fat. In this article, a simple pH modulation strategy was applied to regulate high internal phase (HIPE) gels prepared from PeaP and hydroxypropyl starch (HPS). The results showed that the interfacial tension of PeaP decreased from 11.9 to 7.1 mN/m at 5% PeaP and from 9.9 to 6.3 mN/m at 10% PeaP with increasing pH from 7 to 11. The incorporation of HPS improved the strength and physical stability of the HIPE gel. HIPE gels showed the best three-dimensional printing ability at pH 11. The main mechanism of HIPE gels at pH 3 was hydrophobic interaction, while electrostatic interaction dominated at pH 7, 9, and 11. This study may provide insights into the development of PeaP-based HIPE gels as a printable fat alternative.
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Affiliation(s)
- Yihui Wang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China
| | - Yueyue Yang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu Province 214122, China
| | - Liangyun Xu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu Province 214122, China
| | - Chao Qiu
- School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China
| | - Aiquan Jiao
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China.
| | - Zhengyu Jin
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, Jiangsu Province 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu Province 214122, China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
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11
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Talekar S, Barrow CJ, Nguyen HC, Zolfagharian A, Zare S, Farjana SH, Macreadie PI, Ashraf M, Trevathan-Tackett SM. Using waste biomass to produce 3D-printed artificial biodegradable structures for coastal ecosystem restoration. Sci Total Environ 2024; 925:171728. [PMID: 38492597 DOI: 10.1016/j.scitotenv.2024.171728] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 03/02/2024] [Accepted: 03/13/2024] [Indexed: 03/18/2024]
Abstract
The loss of ecosystem functions and services caused by rapidly declining coastal marine ecosystems, including corals and bivalve reefs and wetlands, around the world has sparked significant interest in interdisciplinary methods to restore these ecologically and socially important ecosystems. In recent years, 3D-printed artificial biodegradable structures that mimic natural life stages or habitat have emerged as a promising method for coastal marine restoration. The effectiveness of this method relies on the availability of low-cost biodegradable printing polymers and the development of 3D-printed biomimetic structures that efficiently support the growth of plant and sessile animal species without harming the surrounding ecosystem. In this context, we present the potential and pathway for utilizing low-cost biodegradable biopolymers from waste biomass as printing materials to fabricate 3D-printed biodegradable artificial structures for restoring coastal marine ecosystems. Various waste biomass sources can be used to produce inexpensive biopolymers, particularly those with the higher mechanical rigidity required for 3D-printed artificial structures intended to restore marine ecosystems. Advancements in 3D printing methods, as well as biopolymer modifications and blending to address challenges like biopolymer solubility, rheology, chemical composition, crystallinity, plasticity, and heat stability, have enabled the fabrication of robust structures. The ability of 3D-printed structures to support species colonization and protection was found to be greatly influenced by their biopolymer type, surface topography, structure design, and complexity. Considering limited studies on biodegradability and the effect of biodegradation products on marine ecosystems, we highlight the need for investigating the biodegradability of biopolymers in marine conditions as well as the ecotoxicity of the degraded products. Finally, we present the challenges, considerations, and future perspectives for designing tunable biomimetic 3D-printed artificial biodegradable structures from waste biomass biopolymers for large-scale coastal marine restoration.
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Affiliation(s)
- Sachin Talekar
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria 3216, Australia; ARC Industrial Transformation Training Centre for Green Chemistry in Manufacturing, Deakin University, Waurn Ponds, Victoria 3216, Australia; Centre for Sustainable Bioproducts, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - Colin J Barrow
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria 3216, Australia; ARC Industrial Transformation Training Centre for Green Chemistry in Manufacturing, Deakin University, Waurn Ponds, Victoria 3216, Australia; Centre for Sustainable Bioproducts, Deakin University, Waurn Ponds, Victoria 3216, Australia.
| | - Hoang Chinh Nguyen
- School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Victoria 3216, Australia; Centre for Sustainable Bioproducts, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - Ali Zolfagharian
- School of Engineering, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - Shahab Zare
- School of Engineering, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | | | - Peter I Macreadie
- Deakin Marine Research and Innovation Centre, School of Life and Environmental Sciences, Deakin University, Burwood, Victoria 3125, Australia
| | - Mahmud Ashraf
- School of Engineering, Deakin University, Waurn Ponds, Victoria 3216, Australia
| | - Stacey M Trevathan-Tackett
- Deakin Marine Research and Innovation Centre, School of Life and Environmental Sciences, Deakin University, Burwood, Victoria 3125, Australia
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Soda PRK, Dwivedi A, C M S, Gupta S. Development of 3D printable stabilized earth-based construction materials using excavated soil: Evaluation of fresh and hardened properties. Sci Total Environ 2024; 924:171654. [PMID: 38490425 DOI: 10.1016/j.scitotenv.2024.171654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/08/2024] [Accepted: 03/09/2024] [Indexed: 03/17/2024]
Abstract
Soil excavated during construction and demolition can be utilized to reduce the demand for natural sand in 3D printed constructions. This research attempts to systematically develop 3D printable stabilized earth-based materials using excavated soil (clay content of 42.5 %) as 25 % and 50 % replacement of natural sand, and examine their compressive strength, water permeable porosity, and moisture sensitivity. The effectiveness of two binder systems - Ordinary Portland Cement (OPC) and a combination of OPC and ground granulated blast furnace slag (GGBS used to replace 30 % OPC by mass), was investigated. Non-expansive clay in the soil leads to a steeper reduction in apparent viscosity, 12-15 % higher flow retention, and 50-60 % lower plastic viscosity of soil-based mixes, thus contributing to superior extrusion quality at 35-40 mm lower initial flow than OPC-sand and OPC-GGBS-sand mixes. The addition of GGBS, due to its irregular particle morphologies and interlocking effects, further enhances the shape retention of the printed layers by 8-26 % compared to OPC-soil mortars. The structural build-ups in OPC-soil and OPC-GGBS-soil mortars increase with the increase in clay content, which enabled buildability up to a height of 1.2 m compared to only 0.51-0.55 m for OPC-sand and OPC-GGBS-sand mortars. Higher water demand due to the addition of natural clay increases the porosity of 3D printed OPC-soil mortars, thereby lowering compressive strength and increasing moisture sensitivity. However, a blend of OPC and GGBS substantially reduces the moisture sensitivity of the printed mortars at 28-day age, attributed to better stabilization of clay through hydraulic and pozzolanic action of GGBS. 28-day wet compressive strength of 14-25 MPa is obtained for the printed soil-based mixes depending on the soil dosage and loading direction. In summary, the study provides a feasible solution for the 3D printing of stabilized earth structures with lower demand for natural sand and OPC.
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Affiliation(s)
| | - Ashutosh Dwivedi
- Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560012, India
| | - Sahana C M
- Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560012, India
| | - Souradeep Gupta
- Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560012, India.
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Khodadad Hatkeposhti J, Kordani N, Akbarzadeh Pasha M, Barari A. Fracture load in double keyhole notch PLA-Cu 2O nanocomposites manufactured via compression molding and 3D printing: An experimental and numerical study. J Mech Behav Biomed Mater 2024; 153:106504. [PMID: 38503083 DOI: 10.1016/j.jmbbm.2024.106504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/09/2024] [Accepted: 03/10/2024] [Indexed: 03/21/2024]
Abstract
Polylactic acid (PLA) polymer has garnered significant attention due to its biocompatibility. The incorporation of copper oxide (Cu2O) nanoparticles into this polymer is expected to enhance its antibacterial, electrical, and thermal properties. This modification can potentially improve the performance of PLA in the fields of prosthetics manufacturing or printed circuit fabrication. However, the current research is rather focused on the mechanical properties of the PLA-Cu2O nanocomposites. This research is thus aimed to analyze PLA-Cu2O (97-3 wt%) nanocomposites with a double keyhole notch configuration both experimentally and numerically. Scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), X-ray mapping of elemental distribution(X-map), and thermogravimetric analysis (TGA) were employed to explore the morphology, crystallinity, homogeneity, purity, and thermal stability of the nanocomposite. The specimens were fabricated through two different processes: the classical method of compression molding and the innovative method of 3D printing. The results revealed the superior mechanical performance of the 3D-printed nanocomposite at a 0° raster angle, while the mechanical properties gradually decreased for raster angles of 45° and 90°. The experimental test also indicated a decline in the maximum fracture load of specimens with a double keyhole notch and constant notch inclination angle by raising the notch radius. This behavior was also observed by increasing the notch inclination angle at constant notch radius. The numerical results were similar to the experimental findings. Moreover, the nanocomposite manufactured through the classical method exhibited higher critical fracture load compared to their 3D-printed counterparts with the same geometry.
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Affiliation(s)
| | - Naser Kordani
- Department of Mechanical Engineering, University of Mazandaran, Babolsar, Iran.
| | - Mohammad Akbarzadeh Pasha
- Department of Solid State Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran.
| | - Ahmad Barari
- Department of Engineering and Applied Science, University of Ontario Institute of Technology (UOIT), Oshawa, Canada
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Kunath BA, Beloglowka K, Rainbow R, Ploeg HL. Mechanical loading of ex vivo bovine trabecular bone in 3D printed bioreactor chambers. J Mech Behav Biomed Mater 2024; 153:106470. [PMID: 38422872 DOI: 10.1016/j.jmbbm.2024.106470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 02/05/2024] [Accepted: 02/16/2024] [Indexed: 03/02/2024]
Abstract
Previous ex vivo bone culture methods have successfully implemented polycarbonate (PC) bioreactors to investigate bone adaptation to mechanical load; however, they are difficult to fabricate and have been limited to a 5 mm maximum specimen height. The objective of this study was to validate a custom-made 3D printed MED610TM bioreactor system that addresses the limitations of the PC bioreactor and assess its efficacy in ex vivo bone culture. Twenty-three viable trabecular bone cores (10 mm height by 10 mm diameter) from an 18-month-old bovine sternum were cultured in MED610TM bioreactors with culture medium at 37 °C and 5% CO2 for 21-days. Bone cores were ranked based on their day 0 apparent elastic modulus (Eapp) and evenly separated into a "Load" group (n = 12) and a control group (n = 11). The Load group was loaded five times per week with a sinusoidal strain waveform between -1000 and -5000 με for 120 cycles at 2 Hz. Eapp was assessed on day 0, 8, and 21 using quasi-static tests with a -4000 με applied strain. Over 21-days, the Eapp of Load group samples tended to increase by more than double the control group (53.4% versus 20.9%) and no visual culture contamination was observed. This study demonstrated that bone organ culture in 3D printed MED610TM bioreactors replicated Eapp trends found in previous studies with PC bioreactors. However, further studies are warranted with a larger sample size to increase statistical power and histology to assess cell viability and bone mineral apposition rate.
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Affiliation(s)
- Brian A Kunath
- Department of Mechanical and Materials Engineering, Queen's University, Kingston, ON, Canada; Centre for Health Innovation, Queen's University, Kingston, ON, Canada.
| | - Kail Beloglowka
- Department of Mechanical and Materials Engineering, Queen's University, Kingston, ON, Canada; Centre for Health Innovation, Queen's University, Kingston, ON, Canada.
| | - Roshni Rainbow
- Department of Mechanical and Materials Engineering, Queen's University, Kingston, ON, Canada; Centre for Health Innovation, Queen's University, Kingston, ON, Canada.
| | - Heidi-Lynn Ploeg
- Department of Mechanical and Materials Engineering, Queen's University, Kingston, ON, Canada; Centre for Health Innovation, Queen's University, Kingston, ON, Canada.
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Knode V, Ludwig B, Hamadeh S, Pandis N, Fleming PS. An in vitro comparison of the dimensional stability of four 3D-printed models under various storage conditions. Angle Orthod 2024; 94:346-352. [PMID: 38639456 DOI: 10.2319/081223-557.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 01/01/2024] [Indexed: 04/20/2024] Open
Abstract
OBJECTIVES To investigate the dimensional stability of various 3D-printed models derived from resin and plant-based, biodegradable plastics (PLA) under specific storage conditions for a period of up to 21 weeks. MATERIALS AND METHODS Four different printing materials, including Draft V2, study model 2, and Ortho model OD01 resins as well as PLA mineral, were evaluated over a 21-week period. Eighty 3D-printed models were divided equally into two groups, with one group stored in darkness and the other exposed to daylight. All models were stored at a constant room temperature (20°C). Measurements were taken at 7-week intervals using the Inspect 3D module in OnyxCeph software (Image Instruments GmbH, Chemnitz, Germany). RESULTS Dimensional change was noted for all of the models with shrinkage of up to 0.26 mm over the study period. Most contraction occured from baseline to T1, although significant further contraction also arose from T1 to T2 (P < .001) and T1 to T3 (P < .001). More shrinkage was observed when exposed to daylight overall and for each resin type (P < .01). The least shrinkage was noted with Ortho model OD01 resin (0.16 mm, SD = 0.06), and the highest level of shrinkage was observed for Draft V2 resin (0.23 mm, SD = 0.06; P < .001). CONCLUSIONS Shrinkage of 3D-printed models is pervasive, arising regardless of the material used (PLA or resin) and being independent of the brand or storage conditions. Consequently, immediate utilization of 3D printing for orthodontic appliance purposes may be preferable, with prolonged storage risking the manufacture of inaccurate orthodontic retainers and appliances.
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Shah NR, Weadock WJ, Williams KM, Moreci R, Stoll T, Joshi A, Petroze R, Newman EA. Use of modern three-dimensional imaging models to guide surgical planning for local control of pediatric extracranial solid tumors. Pediatr Blood Cancer 2024; 71:e30933. [PMID: 38430473 DOI: 10.1002/pbc.30933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 02/13/2024] [Indexed: 03/03/2024]
Abstract
INTRODUCTION In complex pediatric surgical oncology, surgical planning is contingent upon data gathered from preoperative imaging. Three-dimensional (3D) modeling and printing has been shown to be beneficial for adult presurgical planning, though pediatric literature is less robust. The study reviews our institutional experience with the use of 3D image segmentation and printed models in approaching resection of extracranial solid tumors in children. METHODS This is a single institutional series from 2021 to 2023. Models were based on computed tomography and magnetic resonance imaging studies, optimized for 3D imaging. The feasibility and creation of the models is reviewed, including specific techniques, software, and printing materials from our institution. Clinical implications for surgical planning are also described, along with detailed preoperative and intraoperative images. RESULTS 3D modeling and printing was performed for four pediatric patients diagnosed with extracranial solid tumors. Diagnoses included Ewing sarcoma, hepatoblastoma, synovial sarcoma, and osteosarcoma. No intraoperative complications or discrepancies with the preoperative 3D-printed model were noted. No evidence of local recurrence was identified in any patient thus far. CONCLUSION Our institutional series demonstrates a wide spectrum of clinical application for 3D modeling and printing technology within pediatric surgical oncology. This technology may aid in surgical planning for both resection and reconstruction, can be applied to a diverse breadth of diagnoses, and may potentially augment patient and/or family education about their condition.
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Affiliation(s)
- Nikhil R Shah
- Section of Pediatric Surgery, Michigan Medicine, Ann Arbor, Michigan, USA
| | - William J Weadock
- Department of Radiology, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Keyonna M Williams
- Section of Pediatric Surgery, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Rebecca Moreci
- Center for Surgical Training and Research, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Tammy Stoll
- Section of Pediatric Surgery, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Aparna Joshi
- Department of Radiology, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Robin Petroze
- Section of Pediatric Surgery, Michigan Medicine, Ann Arbor, Michigan, USA
| | - Erika A Newman
- Section of Pediatric Surgery, Michigan Medicine, Ann Arbor, Michigan, USA
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Kumar P, Shamim, Muztaba M, Ali T, Bala J, Sidhu HS, Bhatia A. Fused Deposition Modeling 3D-Printed Scaffolds for Bone Tissue Engineering Applications: A Review. Ann Biomed Eng 2024; 52:1184-1194. [PMID: 38418691 DOI: 10.1007/s10439-024-03479-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 02/16/2024] [Indexed: 03/02/2024]
Abstract
The emergence of bone tissue engineering as a trend in regenerative medicine is forcing scientists to create highly functional materials and scaffold construction techniques. Bone tissue engineering uses 3D bio-printed scaffolds that allow and stimulate the attachment and proliferation of osteoinductive cells on their surfaces. Bone grafting is necessary to expedite the patient's condition because the natural healing process of bones is slow. Fused deposition modeling (FDM) is therefore suggested as a technique for the production process due to its simplicity, ability to create intricate components and movable forms, and low running costs. 3D-printed scaffolds can repair bone defects in vivo and in vitro. For 3D printing, various materials including metals, polymers, and ceramics are often employed but polymeric biofilaments are promising candidates for replacing non-biodegradable materials due to their adaptability and environment friendliness. This review paper majorly focuses on the fused deposition modeling approach for the fabrication of 3D scaffolds. In addition, it also provides information on biofilaments used in FDM 3D printing, applications, and commercial aspects of scaffolds in bone tissue engineering.
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Affiliation(s)
- Pawan Kumar
- Department of Pharmaceutical Sciences and Technology, Maharaja Ranjit Singh Punjab Technical University, Bathinda, 151001, India.
| | - Shamim
- IIMT College of Medical Sciences, IIMT University, Ganga Nagar, Meerut, Uttar Pradesh, 250001, India
| | - Mohammad Muztaba
- Department of Pharmacology, Praduman Singh Sikshan Prasikshan Sansthan Pharmacy College, Phutahiya Sansarpur, Basti, Uttar Pradesh, 272001, India
| | - Tarmeen Ali
- Department of Pharmacy, Swami Vivekanand Subharti University, Subhartipuram, Meerut, Uttar Pradesh, 250005, India
| | - Jyoti Bala
- Department of Pharmaceutical Sciences and Technology, Maharaja Ranjit Singh Punjab Technical University, Bathinda, 151001, India
| | - Haramritpal Singh Sidhu
- Department of Mechanical Engineering, Giani Zail Singh Campus College of Engineering & Technology, Maharaja Ranjit Singh Punjab Technical University, Bathinda, 151001, India
| | - Amit Bhatia
- Department of Pharmaceutical Sciences and Technology, Maharaja Ranjit Singh Punjab Technical University, Bathinda, 151001, India
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Schopper HK, Gadkaree SK, Lighthall JG. Approach to Major Nasal Reconstruction: Benefits of Staged Surgery and Use of Technology. Facial Plast Surg Clin North Am 2024; 32:199-210. [PMID: 38575278 DOI: 10.1016/j.fsc.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
This article reviews special considerations in complex nasal defects including treatment of adjacent subunit defects, timing of repair with radiation, reconstruction in patients with prior repairs or recurrent disease, and the role of prosthetics. The role of technological advances including virtual surgical planning, 3 dimensional printing, biocompatible materials, and tissue engineering is discussed.
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Affiliation(s)
- Heather K Schopper
- Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology - Head and Neck Surgery, Penn State College of Medicine, 500 University Drive H-091, Hershey, PA 17033, USA.
| | - Shekhar K Gadkaree
- Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology - Head and Neck Surgery, University of Miami Miller School of Medicine, 1120 Northwest 14th St, Miami, FL 33136, USA
| | - Jessyka G Lighthall
- Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology - Head and Neck Surgery, Penn State College of Medicine, 500 University Drive H-091, Hershey, PA 17033, USA
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Zeng Y, Ji X, Dong B, Zhang L, Zheng Q, Wang Y, Han X, Ye L, Huang D, Wang S. 3D-printed coloured tooth model for inlay preparation in pre-clinical dental education. Eur J Dent Educ 2024; 28:481-489. [PMID: 37994209 DOI: 10.1111/eje.12972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 05/08/2023] [Accepted: 10/16/2023] [Indexed: 11/24/2023]
Abstract
INTRODUCTION Accurate inlay preparation is extremely important in pre-clinical training. However, there is a lack of tools to guide students to efficiently practise inlay preparation. Therefore, a 3D-printed coloured tooth model for inlay preparation was designed to guide beginners to practise inlay preparation by themselves according to different colour prompts. This study aimed to evaluate the benefits of using a 3D-printed coloured tooth model in the pre-clinical training on inlay preparation. MATERIALS AND METHODS Twenty-eight students in their fourth-year undergraduate dental program participated in this study. The participants were randomly assigned to two groups for the inlay preparation. Group 1 prepared a plain tooth model for the first and fourth attempts and a 3D-printed coloured tooth model for the second and third attempts (n = 14). Group 2 prepared four plain tooth models (n = 14). The first and fourth tooth models prepared by both groups were scored using an evaluation system (Fair Grade 2000, NISSIN). Next, questionnaires answered by students were used to evaluate the benefits of using a 3D-printed coloured tooth model and self-evaluate hands-on ability using a grading system (1 = strongly agree, 2 = agree, 3 = neutral, 4 = disagree, and 5 = strongly disagree). The scores were evaluated statistically using the Mann-Whitney U test, and the given grades are displayed as percentages and mean values. RESULTS There was an overall increase in the clinical confidence of all students after repeated attempts to prepare an inlay; however, students from group 1, who had used the 3D-printed coloured tooth model, had more positive experiences and comments. The 3D-printed coloured tooth model for inlay preparation has been widely praised by participants. Comparing the average score of the first and fourth preparations, the average score of group 1 increased by 12% (Ø 54.46 ± 8.33, Ø 61.11 ± 7.13, p = .090), while that of group 2 increased by 0.72% (Ø 56.39 ± 9.59, Ø 56.80 ± 8.46, p = .925). CONCLUSION Students favoured the use of the 3D-printed coloured tooth model, and this improved the average score for inlay preparation. The 3D-printed coloured tooth model for inlay preparation is expected to play an important role in dental education in the future.
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Affiliation(s)
- Yanglin Zeng
- West China School of Stomatology, Sichuan University, Chengdu, China
| | - Xiao Ji
- West China School of Stomatology, Sichuan University, Chengdu, China
| | - Bo Dong
- Department of Stomatological Technology, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Linglin Zhang
- Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Qinghua Zheng
- National Demonstration Center for Experimental Stomatology Education, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Ya Wang
- National Demonstration Center for Experimental Stomatology Education, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Xianglong Han
- National Demonstration Center for Experimental Stomatology Education, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Ling Ye
- National Demonstration Center for Experimental Stomatology Education, West China School of Stomatology, Sichuan University, Chengdu, China
| | - Dingming Huang
- Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Shida Wang
- National Demonstration Center for Experimental Stomatology Education, West China School of Stomatology, Sichuan University, Chengdu, China
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Galibourg A, Vergnes JN, Rattier R, Hourset M, Broutin M, Dusseau X, Bataille C, Nabet C, Esclassan R. Preclinical motor chunking and fine motor skill learning in fixed prosthodontics: Contribution of 3D printing and satisfaction of dental students. Eur J Dent Educ 2024; 28:398-407. [PMID: 37908156 DOI: 10.1111/eje.12961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 08/10/2023] [Accepted: 10/01/2023] [Indexed: 11/02/2023]
Abstract
INTRODUCTION In fixed prosthodontics, simulators are essential to students for a progressive transition from preclinical to clinical condition. With the 3D printing technology, we developed resin bars allowing students to better visualise by motor chunking technique. Main objectives of this work were to describe this teaching methodology used in preclinic among different promotions of second, third and fourth dental years and to evaluate students' feedback. MATERIALS AND METHODS Two hundred seventy resin strips were digitally designed and printed in resin. All participants from second, third and fourth had to fulfil a User Experience Questionnaire (UEQ) after the preclinical work. The scales of this questionnaire covered the complete impression of the user experience. Both classical aspects of usability (efficiency, insight and reliability) and aspects of user experience (originality, stimulation) were measured. RESULTS For the second dental years, 'Attractiveness', 'Stimulation' and 'Novelty' were considered 'Excellent'. For the third dental year, novelty average was considered as 'Excellent'. For the fourth dental year, 'novelty' was considered as 'Good'. DISCUSSION The resin plates used in this study are original and stimulating for the students, especially for the second-year dental students who found the exercises useful for their learning. This method can also be used by creating scenarios close to the clinical situations encountered in dentistry departments (more dilapidated teeth, preparation of inlays, post and core, etc.). This 3D printed simulation model is not intended to replace the Frasaco® models but is a complement to the learning process.
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Affiliation(s)
- Antoine Galibourg
- Faculte De Chirurgie Dentaire, Universite Paul Sabatier Toulouse III, Toulouse, France
- Centre Hospitaler Universitaire De Toulouse, Toulouse, France
- Center of Anthropobiology and Genomics of Toulouse (CAGT), Toulouse, France
| | - Jean-Noel Vergnes
- Faculte De Chirurgie Dentaire, Universite Paul Sabatier Toulouse III, Toulouse, France
- Centre Hospitaler Universitaire De Toulouse, Toulouse, France
| | - Robin Rattier
- Faculte De Chirurgie Dentaire, Universite Paul Sabatier Toulouse III, Toulouse, France
- Centre Hospitaler Universitaire De Toulouse, Toulouse, France
| | - Mathilde Hourset
- Faculte De Chirurgie Dentaire, Universite Paul Sabatier Toulouse III, Toulouse, France
- Centre Hospitaler Universitaire De Toulouse, Toulouse, France
| | - Margaux Broutin
- Faculte De Chirurgie Dentaire, Universite Paul Sabatier Toulouse III, Toulouse, France
- Centre Hospitaler Universitaire De Toulouse, Toulouse, France
| | - Xavier Dusseau
- Faculte De Chirurgie Dentaire, Universite Paul Sabatier Toulouse III, Toulouse, France
- Centre Hospitaler Universitaire De Toulouse, Toulouse, France
| | - Coralie Bataille
- Faculte De Chirurgie Dentaire, Universite Paul Sabatier Toulouse III, Toulouse, France
- Centre Hospitaler Universitaire De Toulouse, Toulouse, France
| | - Catherine Nabet
- Faculte De Chirurgie Dentaire, Universite Paul Sabatier Toulouse III, Toulouse, France
- Centre Hospitaler Universitaire De Toulouse, Toulouse, France
| | - Rémi Esclassan
- Faculte De Chirurgie Dentaire, Universite Paul Sabatier Toulouse III, Toulouse, France
- Centre Hospitaler Universitaire De Toulouse, Toulouse, France
- Center of Anthropobiology and Genomics of Toulouse (CAGT), Toulouse, France
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Zheng LY, Li D, Wang LJ, Wang Y. Tailoring 3D-printed high internal phase emulsion-rice starch gels: Role of amylose in rheology and bioactive stability. Carbohydr Polym 2024; 331:121891. [PMID: 38388064 DOI: 10.1016/j.carbpol.2024.121891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/06/2024] [Accepted: 01/29/2024] [Indexed: 02/24/2024]
Abstract
This study investigated the properties of 3D-printed high internal phase emulsion (HIPE)-rice starch gels, specially tailored for personalized nutrition by co-encapsulating resveratrol and β-carotene. We examined the influence of amylose content on various parameters, including functional groups, linear and nonlinear rheology, printed precision and microstructural stability. Additionally, we assessed the protective efficacy and release in vitro digestion of these gels on the encapsulated bioactive components. Compared to HIPE, HIPE-starch gels differently impacted by amylose content in starches. Low-level amylose weakened the network structure, attributed to amylose mainly responsible for gel formation and weak hydrogen bond interaction between the surface-active molecules and amylose due to gelatinized starch granules rupturing the protein network. Oppositely, high-level amylose led to denser, more gel-like structures with enhanced mechanical strength and reversible deformation resistance, making them suitable for 3D printing. Furthermore, 3D-printed gels with high-level amylose demonstrated well-defined structures, smooth surfaces, stable printing and less dimension deviation. They were also regarded as effective entrapping and delivery systems for resveratrol and β-carotene, protecting them against degradation from environment and damage under the erosion of digestive fluid. Overall, this research offers a straightforward strategy for creating reduced-fat HIPE gels that serve as the carrier for personalized nutraceutical foods.
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Affiliation(s)
- Lu-Yao Zheng
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Functional Food from Plant Resources, China Agricultural University, P. O. Box 50, 17 Qinghua Donglu, Beijing 100083, China
| | - Dong Li
- College of Engineering, Beijing Advanced Innovation Center for Food Nutrition and Human Health, National Energy R & D Center for Non-food Biomass, China Agricultural University, Beijing, China
| | - Li-Jun Wang
- College of Food Science and Nutritional Engineering, Beijing Key Laboratory of Functional Food from Plant Resources, China Agricultural University, P. O. Box 50, 17 Qinghua Donglu, Beijing 100083, China.
| | - Yong Wang
- School of Chemical Engineering, UNSW, Sydney, NSW 2052, Australia
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22
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Hsu YH, Chou YC, Chen CL, Yu YH, Lu CJ, Liu SJ. Development of novel hybrid 3D-printed degradable artificial joints incorporating electrospun pharmaceutical- and growth factor-loaded nanofibers for small joint reconstruction. Biomater Adv 2024; 159:213821. [PMID: 38428121 DOI: 10.1016/j.bioadv.2024.213821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 02/04/2024] [Accepted: 02/27/2024] [Indexed: 03/03/2024]
Abstract
Small joint reconstruction remains challenging and can lead to prosthesis-related complications, mainly due to the suboptimal performance of the silicone materials used and adverse host reactions. In this study, we developed hybrid artificial joints using three-dimensional printing (3D printing) for polycaprolactone (PCL) and incorporated electrospun nanofibers loaded with drugs and biomolecules for small joint reconstruction. We evaluated the mechanical properties of the degradable joints and the drug discharge patterns of the nanofibers. Empirical data revealed that the 3D-printed PCL joints exhibited good mechanical and fatigue properties. The drug-eluting nanofibers sustainedly released teicoplanin, ceftazidime, and ketorolac in vitro for over 30, 19, and 30 days, respectively. Furthermore, the nanofibers released high levels of bone morphogenetic protein-2 and connective tissue growth factors for over 30 days. An in vivo animal test demonstrated that nanofiber-loaded joints released high concentrations of antibiotics and analgesics in a rabbit model for 28 days. The animals in the drug-loaded degradable joint group showed greater activity counts than those in the surgery-only group. The experimental data suggest that degradable joints with sustained release of drugs and biomolecules may be utilized in small joint arthroplasty.
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Affiliation(s)
- Yung-Heng Hsu
- Bone and Joint Research Center, Department of Orthopedic Surgery, Chang Gung Memorial Hospital-Linkou, Taoyuan 33305, Taiwan
| | - Ying-Chao Chou
- Bone and Joint Research Center, Department of Orthopedic Surgery, Chang Gung Memorial Hospital-Linkou, Taoyuan 33305, Taiwan
| | - Chao-Lin Chen
- Department of Mechanical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Yi-Hsun Yu
- Bone and Joint Research Center, Department of Orthopedic Surgery, Chang Gung Memorial Hospital-Linkou, Taoyuan 33305, Taiwan
| | - Chia-Jung Lu
- Bone and Joint Research Center, Department of Orthopedic Surgery, Chang Gung Memorial Hospital-Linkou, Taoyuan 33305, Taiwan; Department of Mechanical Engineering, Chang Gung University, Taoyuan 33302, Taiwan
| | - Shih-Jung Liu
- Bone and Joint Research Center, Department of Orthopedic Surgery, Chang Gung Memorial Hospital-Linkou, Taoyuan 33305, Taiwan; Department of Mechanical Engineering, Chang Gung University, Taoyuan 33302, Taiwan.
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García-Ávila J, González-Gallegos CP, Segura-Ibarra V, Vazquez E, Garcia-Lopez E, Rodríguez CA, Vargas-Martínez A, Cuan-Urquizo E, Ramírez-Cedillo E. Dynamic topology optimization of 3D-Printed transtibial orthopedic implant using tunable isotropic porous metamaterials. J Mech Behav Biomed Mater 2024; 153:106479. [PMID: 38492502 DOI: 10.1016/j.jmbbm.2024.106479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 02/07/2024] [Accepted: 02/24/2024] [Indexed: 03/18/2024]
Abstract
In this paper, we introduce the design and manufacturing process of a transtibial orthopedic implant. We used medical-grade polyurethane polymer resin to fabricate a 3D porous architected implant with tunable isotropy, employing a high-speed printing method known as Continuous Liquid Interface Production (CLIP). Our objective is to enhance the weight-bearing capabilities of the bone structures in the residual limb, thereby circumventing the traditional reliance on a natural bridge. To achieve a custom-made design, we acquire the topology and morphology of the residual limb as well as the bone structure of the tibia and fibula, utilizing computed tomography (CT) and high-resolution 3D scanning. We employed a dynamic topological optimization method, informed by gait cycle data, to effectively reduce the mass of the implant. This approach, which differs from conventional static methods, enables the quantification of variations in applied forces over time. Using the Euler-Lagrange energy approach, we propose the equations of motion for a homologous multibody model with three degrees of freedom. The versatility of the Solid Isotropic Material with Penalization (SIMP) method facilitates the integration of homogenization methods for microscale porous architectures into the optimized domain. The design of these porous architectures is based on a bias-driven tuning symmetry isotropy of a Triply Periodic Minimal Surface (Schwarz Primitive surface). The internal porosity of the structure significantly reduces weight without compromising the isotropic behavior of the implant.
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Affiliation(s)
- Josué García-Ávila
- Department of Mechanical Engineering, Stanford University, Stanford, CA, 94305-2004, USA
| | | | - Victor Segura-Ibarra
- Tecnologico de Monterrey, School of Engineering and Sciences, Av. Eugenio Garza Sada Sur 2501, Monterrey, Mexico
| | - Elisa Vazquez
- Tecnologico de Monterrey, School of Engineering and Sciences, Av. Eugenio Garza Sada Sur 2501, Monterrey, Mexico
| | - Erika Garcia-Lopez
- Tecnologico de Monterrey, School of Engineering and Sciences, Av. Eugenio Garza Sada Sur 2501, Monterrey, Mexico
| | - Ciro A Rodríguez
- Tecnologico de Monterrey, School of Engineering and Sciences, Av. Eugenio Garza Sada Sur 2501, Monterrey, Mexico; Laboratorio Nacional de Manufactura Aditiva y Digital (MADiT), Autopista Al Aeropuerto, Km., 9.5, Calle Alianza Norte #100, Parque PIIT, Apodaca, 66629, Mexico
| | - Adriana Vargas-Martínez
- Tecnologico de Monterrey, School of Engineering and Sciences, Av. Eugenio Garza Sada Sur 2501, Monterrey, Mexico
| | - Enrique Cuan-Urquizo
- Tecnológico de Monterrey, Institute of Advanced Materials for Sustainable Manufacturing, Monterrey, Mexico
| | - Erick Ramírez-Cedillo
- Tecnologico de Monterrey, School of Engineering and Sciences, Av. Eugenio Garza Sada Sur 2501, Monterrey, Mexico; Laboratorio Nacional de Manufactura Aditiva y Digital (MADiT), Autopista Al Aeropuerto, Km., 9.5, Calle Alianza Norte #100, Parque PIIT, Apodaca, 66629, Mexico; 3D Factory, Ramón Treviño 1109, Monterrey, Mexico.
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24
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Diederichs EV, Mondal D, Patil H, Gorbet M, Willett TL. The effect of triglycerol diacrylate on the printability and properties of UV curable, bio-based nanohydroxyapatite composites. J Mech Behav Biomed Mater 2024; 153:106499. [PMID: 38490049 DOI: 10.1016/j.jmbbm.2024.106499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 02/29/2024] [Accepted: 03/07/2024] [Indexed: 03/17/2024]
Abstract
3D printable biopolymer nanocomposites composed of hydroxyapatite nanoparticles and functionalized plant-based monomers demonstrate potential as sustainable and structural biomaterials. To increase this potential, their printability and performance must be improved. For extrusion-based 3D printing, such as Direct Ink Writing (DIW), printability is important for print fidelity. In this work, triglycerol diacrylate (TGDA) was added to an acrylated epoxidized soybean oil:polyethylene glycol diacrylate resin to increase hydrogen bonding. Greater hydrogen bonding was hypothesized to improve printability by increasing the ink's shear yield strength, and therefore shape holding after deposition. The effects of this additive on material and mechanical properties were quantified. Increased hydrogen bonding due to TGDA content increased the ink's shear yield stress and viscosity by 916% and 27.6%, respectively. This resulted in improved printability, with best performance at 3 vol% TGDA. This composition achieved an ultimate tensile strength (UTS) of 32.4 ± 2.1 MPa and elastic modulus of 1.15 ± 0.21 GPa. These were increased from the 0 vol% TGDA composite, which had an UTS of 24.8 ± 1.8 MPa and a modulus of 0.88 ± 0.06 GPa. This study demonstrates the development of bio-based additive manufacturing feedstocks for potential uses in sustainable manufacturing, rapid prototyping, and biomaterial applications.
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Affiliation(s)
- Elizabeth V Diederichs
- Composite Biomaterial Systems Laboratory, Department of Systems Design, University of Waterloo, Douglas Wright Engineering Building, 200 University Avenue West, Waterloo, Canada
| | - Dibakar Mondal
- Composite Biomaterial Systems Laboratory, Department of Systems Design, University of Waterloo, Douglas Wright Engineering Building, 200 University Avenue West, Waterloo, Canada
| | - Haresh Patil
- Composite Biomaterial Systems Laboratory, Department of Systems Design, University of Waterloo, Douglas Wright Engineering Building, 200 University Avenue West, Waterloo, Canada
| | - Maud Gorbet
- Material Interaction with Biological Systems Laboratory, Department of Systems Design, University of Waterloo, Carl A. Pollock Hall, 200 University Avenue West, Waterloo, Canada
| | - Thomas L Willett
- Composite Biomaterial Systems Laboratory, Department of Systems Design, University of Waterloo, Douglas Wright Engineering Building, 200 University Avenue West, Waterloo, Canada.
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25
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Hughes MF, Clapper HM, Tedla G, Sowers TD, Rogers KR. Simulated gastric leachate of 3D printer metal-fill filaments induces cytotoxic effects in rat and human intestinal models. Toxicol In Vitro 2024; 97:105805. [PMID: 38458500 DOI: 10.1016/j.tiv.2024.105805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 02/28/2024] [Accepted: 02/29/2024] [Indexed: 03/10/2024]
Abstract
Metals are used in 3-dimensional (3D) printer filaments in the manufacture of 3D printed objects. Exposure to the filaments, printed objects and emissions from printing may pose health risks from release of toxic metals. This study investigated the cytotoxicity of extruded 3D printer filament leachates in rat and human intestinal cells. Copper-, bronze-, and steel-fill extruded filaments were incubated in acidic media for 2 h. Leachates were adjusted to pH 7 and cells exposed for 4 or 24 h. Concentration- and time-dependent decreases in rat and human cell viability were observed using a colorimetric assay and confirmed by microscopy. Copper- and bronze-fill leachates were more cytotoxic than steel. Copper-fill leachates had the highest copper concentrations by ICP-MS. Exposure to CuSO4 resulted in concentration-dependent cytotoxicity in rat cells. The copper chelator bathocuproine disulphonate alleviated cytotoxicity of CuSO4 and copper-fill leachate, suggesting that copper ions have a role in the cytotoxicity. Hydrogen peroxide increased and glutathione decreased in rat cells exposed to copper-fill leachate, suggesting the formation of reactive oxygen species. Overall, our data indicate that metals released from the acidic exposure of print objects using metal-fill filaments, especially copper, are toxic to rat and human intestinal cells and additional studies are needed.
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Affiliation(s)
- Michael F Hughes
- Center for Computational Toxicology and Exposure, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States of America.
| | - Haley M Clapper
- Oak Ridge Institute for Science and Education, Research Triangle Park, NC, United States of America
| | - Getachew Tedla
- Oak Ridge Institute for Science and Education, Research Triangle Park, NC, United States of America
| | - Tyler D Sowers
- Center for Environmental Measurement and Modeling, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States of America
| | - Kim R Rogers
- Center for Environmental Measurement and Modeling, Office of Research and Development, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States of America
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26
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Sonkaya E, Kürklü ZGB. Comparisons of student comprehension of 3D-printed, standard model, and extracted teeth in hands-on sessions. Eur J Dent Educ 2024; 28:452-460. [PMID: 37927207 DOI: 10.1111/eje.12969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Revised: 02/01/2023] [Accepted: 10/16/2023] [Indexed: 11/07/2023]
Abstract
INTRODUCTION Cavity preparation and direct and indirect pulp capping are difficult processes to learn in dentistry. Although plastic teeth are used in universities in Turkey, the standard model does not teach students how to distinguish between dental hard tissues from caries and how this relates to the pulp. The aim of this study was to investigate the differences in learning when a three-dimensional (3D)-printed tooth was employed in comparison with the standard model and extracted teeth. The differences are evaluated in the design, feasibility, and contribution of the 3D-printed dental tooth in pre-clinical education. MATERIALS AND METHODS The multi-layer 3D-printed tooth's authentic design and replication of the dental hard tissues and carious lesions are explored with 55 students for pre-clinical education, which includes caries excavation and direct and indirect pulp capping. The students completed questionnaires evaluating the 3D-printed teeth through comparison with the plastic and extracted teeth, rated with scores from 1 to 11 (1: poorest conformity; 11: excellent conformity). RESULTS The questionnaire results indicated that students approved the printed tooth model for the practice of theoretical knowledge and the model received ratings between good and excellent. The results were statistically analysed using the Wilcoxon signed-rank test, and the printed teeth had the highest approval from the students (p < .001). CONCLUSION The results of this study demonstrated that the use of the designed 3D-printed tooth is preferred by the students based on their perception of learning cavity preparation and pulp capping in a pre-clinical environment. Workflow and production were cost-effective with the use of 3D printing technology. The printed tooth allowed students to gain realistic experience before treating patients.
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Affiliation(s)
- Ezgi Sonkaya
- Department of Restorative Dentistry, Faculty of Dentistry, Cukurova University, Adana, Turkey
| | - Z Gonca Bek Kürklü
- Department of Restorative Dentistry, Faculty of Dentistry, Cukurova University, Adana, Turkey
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27
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Parrilla M, Sena-Torralba A, Steijlen A, Morais S, Maquieira Á, De Wael K. A 3D-printed hollow microneedle-based electrochemical sensing device for in situ plant health monitoring. Biosens Bioelectron 2024; 251:116131. [PMID: 38367566 DOI: 10.1016/j.bios.2024.116131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/31/2024] [Accepted: 02/12/2024] [Indexed: 02/19/2024]
Abstract
Plant health monitoring is devised as a new concept to elucidate in situ physiological processes. The need for increased food production to nourish the growing global population is inconsistent with the dramatic impact of climate change, which hinders crop health and exacerbates plant stress. In this context, wearable sensors play a crucial role in assessing plant stress. Herein, we present a low-cost 3D-printed hollow microneedle array (HMA) patch as a sampling device coupled with biosensors based on screen-printing technology, leading to affordable analysis of biomarkers in the plant fluid of a leaf. First, a refinement of the 3D-printing method showed a tip diameter of 25.9 ± 3.7 μm with a side hole diameter on the microneedle of 228.2 ± 18.6 μm using an affordable 3D printer (<500 EUR). Notably, the HMA patch withstanded the forces exerted by thumb pressing (i.e. 20-40 N). Subsequently, the holes of the HMA enabled the fluid extraction tested in vitro and in vivo in plant leaves (i.e. 13.5 ± 1.1 μL). A paper-based sampling strategy adapted to the HMA allowed the collection of plant fluid. Finally, integrating the sampling device onto biosensors facilitated the in situ electrochemical analysis of plant health biomarkers (i.e. H2O2, glucose, and pH) and the electrochemical profiling of plants in five plant species. Overall, this electrochemical platform advances precise and versatile sensors for plant health monitoring. The wearable device can potentially improve precision farming practices, addressing the critical need for sustainable and resilient agriculture in changing environmental conditions.
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Affiliation(s)
- Marc Parrilla
- A-Sense Lab, University of Antwerp, Groenenborgerlaan 171, 2010, Antwerp, Belgium; NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2010, Antwerp, Belgium.
| | - Amadeo Sena-Torralba
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Camino de Vera S/n, 46022, Valencia, Spain
| | - Annemarijn Steijlen
- A-Sense Lab, University of Antwerp, Groenenborgerlaan 171, 2010, Antwerp, Belgium; NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2010, Antwerp, Belgium
| | - Sergi Morais
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Camino de Vera S/n, 46022, Valencia, Spain; Departamento de Química, Universitat Politècnica de València, Camino de Vera S/n, 46022, Valencia, Spain
| | - Ángel Maquieira
- Instituto Interuniversitario de Investigación de Reconocimiento Molecular y Desarrollo Tecnológico (IDM), Universitat Politècnica de València, Universitat de València, Camino de Vera S/n, 46022, Valencia, Spain; Departamento de Química, Universitat Politècnica de València, Camino de Vera S/n, 46022, Valencia, Spain
| | - Karolien De Wael
- A-Sense Lab, University of Antwerp, Groenenborgerlaan 171, 2010, Antwerp, Belgium; NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2010, Antwerp, Belgium.
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Antunes D, Mayeur O, Mauprivez C, Nicot R. 3D-printed model for gingival flap surgery simulation: Development and pilot test. Eur J Dent Educ 2024; 28:698-706. [PMID: 38385699 DOI: 10.1111/eje.12998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 11/25/2023] [Accepted: 02/04/2024] [Indexed: 02/23/2024]
Abstract
INTRODUCTION To assess the feasibility of a realistic model for learning oral flaps using 3D printing technology. MATERIALS AND METHODS A mould was designed to reproduce the mandibular gingival mucosa, and a mandibular model was created using a three-dimensional printer for training undergraduate students to perform gingival flaps. After a short interview about its use, the participants were asked to use the simulator and provide feedback using a 5-point Likert questionnaire. RESULTS The 3D-printed oral surgery flap training model was practical and inexpensive. The model was very realistic, educational and useful for hands-on training. CONCLUSIONS 3D printing technology offers new possibilities for training in dental treatments that are currently difficult to replicate. The use of this simulator for oral flap surgery was well-received and considered promising by the participants.
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Affiliation(s)
- David Antunes
- Department of Oral Surgery, University Hospital of Reims, Reims, France
| | - Olivier Mayeur
- CNRS, Centrale Lille, Univ. Lille, UMR 9013 - LaMcube - Laboratoire de Mécanique, Multiphysique, Multiéchelle, Lille, France
| | - Cédric Mauprivez
- Department of Oral Surgery, University Hospital of Reims, Reims, France
- University of Reims Champagne-Ardenne, UFR Odontology, Reims, France
| | - Romain Nicot
- CNRS, Centrale Lille, Univ. Lille, UMR 9013 - LaMcube - Laboratoire de Mécanique, Multiphysique, Multiéchelle, Lille, France
- Univ. Lille, CHU Lille, INSERM, Department of Oral and Maxillofacial Surgery, INSERM U1008 - Advanced Drug Delivery Systems, Lille, France
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Kagaoan Z, Liu X, Cameron A, Aarts J, Choi JJE. Factors influencing the bond strength of additively manufactured crown materials in dentistry: A systematic review of in vitro studies. J Dent 2024; 144:104908. [PMID: 38432351 DOI: 10.1016/j.jdent.2024.104908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/18/2024] [Accepted: 02/26/2024] [Indexed: 03/05/2024] Open
Abstract
OBJECTIVE The purpose of this systematic review was to investigate how different interventions can impact the bond strength of additively manufactured crown materials after cementation. DATA/SOURCES Four online databases Ovid MEDLINE, Scopus, Web of Science and Google Scholar were searched up to January 2023. Inclusion criteria were English-language publications, full-text, and in vitro studies only. Exclusion criteria were studies that did not assess the bonding of an additively manufactured crown material to cement or did not conduct any bond strength tests. An assessment of risk of bias was done in accordance with a modified Consolidated Standards of Reporting Trials (CONSORT) checklist. Each study was analysed and compared based on the interventions and bond strength results. STUDY SELECTION Six studies satisfied the inclusion and exclusion criteria, five of which evaluated photopolymerised resin and one that tested zirconia manufacturing via 3D printing. All studies observed a low risk of bias. The interventions applied included the type of surface pretreatments, airborne-particle abrasion pressure, cement type, taper of crown, and artificial aging. Three studies compared the bonding performance to milled materials. CONCLUSIONS The bond strength of crown materials additively manufactured from photopolymers presented high values and are comparable to milled materials. The systematic review demonstrated there was no definite superior cement type, but airborne-particle abrasion with alumina was generally recommended. There is a clear gap in the literature regarding the bond strength of additively manufactured crowns. Therefore, further research is necessary to evaluate its clinical applicability for permanent restorations. CLINICAL SIGNIFICANCE Factors influencing the bond strength of additively manufactured crown materials should be evaluated so dental professionals can adopt procedures that promote the strongest bond.
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Affiliation(s)
- Zei Kagaoan
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Xiaoyun Liu
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Andrew Cameron
- School of Medicine and Dentistry, Griffith University, Gold Coast Campus, Australia; Menzies Health Institute Queensland Disability & Rehabilitation Center, Gold Coast, Australia
| | - John Aarts
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Joanne Jung Eun Choi
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand.
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Lan D, Luo Y, Qu Y, Man Y. The three-dimensional stability and accuracy of 3D printing surgical templates: An In Vitro study. J Dent 2024; 144:104936. [PMID: 38492806 DOI: 10.1016/j.jdent.2024.104936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 02/23/2024] [Accepted: 03/10/2024] [Indexed: 03/18/2024] Open
Abstract
OBJECTIVE To evaluate the three-dimensional (3D) stability and accuracy of additively manufactured surgical templates fabricated using two different 3D printers and materials. MATERIALS AND METHODS Forty surgical templates were designed and printed using two different 3D printers: the resin group (n = 20) used a digital light processing (DLP) 3D printer with photopolymer resin, and the metal group (n = 20) employed a selective laser melting (SLM) 3D printer with titanium alloy. All surgical templates were scanned immediately after production and re-digitalized after one month of storage. Similarly, the implant simulations were performed twice. Three-dimensional congruency between the original design and the manufactured surgical templates was quantified using the root mean square (RMS), and the definitive and planned implant positions were determined and compared. RESULTS At the postproduction stage, the metal templates exhibited higher accuracy than the resin templates (p < 0.001), and these differences persisted after one month of storage (p < 0.001). The resin templates demonstrated a significant decrease in three-dimensional stability after one month of storage (p < 0.001), whereas the metal templates were not affected (p > 0.05). No significant differences in implant accuracy were found between the two groups. However, the resin templates showed a significant increase in apical and angular deviations after one month of storage (p < 0.001), whereas the metal templates were not affected (p > 0.05). CONCLUSION Printed metal templates showed higher fabrication accuracy than printed resin templates. The three-dimensional stability and implant accuracy of printed metal templates remained unaffected by one month of storage. CLINICAL SIGNIFICANCE With superior three-dimensional stability and acceptable implant accuracy, printed metal templates can be considered a viable alternative technique for guided surgery.
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Affiliation(s)
- Dongping Lan
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China
| | - Yilin Luo
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China
| | - Yili Qu
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China
| | - Yi Man
- State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, Sichuan, China.
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Alfuraih A, Kadri O, Fakhouri F. On the gamma radiation response of commercially available 3D printing materials for medical dosimetry. Appl Radiat Isot 2024; 207:111256. [PMID: 38432035 DOI: 10.1016/j.apradiso.2024.111256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 12/17/2023] [Accepted: 02/24/2024] [Indexed: 03/05/2024]
Abstract
3D printing technology has rapidly spread for decades, allowing the fabrication of medical implants and human phantoms and revolutionizing healthcare. The objective of this study is to evaluate some radiological properties of commercially available 3D printing materials as potential tissue mimicking materials. Among fifteen materials, we compared their properties with nine human tissues. In all materials and tissues, exposure and energy absorption buildup factors were calculated for photon energies between 0.015 and 15 MeV and penetration depths up to 40 mean free path. Furthermore, the Geant4 Monte Carlo toolkit (version 10.5) was used to simulate their percentage depth dose distributions. In addition, equivalent atomic numbers, effective atomic numbers, attenuation coefficients, and CT numbers have been examined. All parameters were considered in calculating the average relative error (σ), which was used as a statistical comparison tool. With σ between 6 and 7, we found that Polylactic Acid (PLA) was capable of simulating eye lenses, blood, soft tissue, lung, muscle, and brain tissues. Moreover, Polymethacrylic Acid (PMAA) material has a σ value of 4 when modeling adipose and breast tissues, respectively. Aside from that, variations in 3D printing materials' infilling percentage can affect their CT numbers. We therefore suggest the PLA for mimicking soft tissue, muscle, brain, eye lens, lung and blood tissues, with an infill of between 92.7 and 94.3 percent. We also suggest an 89 percent infill when simulating breast tissue. Furthermore, with a 96.7 percent infill, the PMAA faithfully replicates adipose tissue. Additionally, we found that a 59 percent infill of Fe-PLA material is comparable to cortical bone. Due to the benefits of creating individualized medical phantoms and equipment, the results might be seen as an added value for both patients and clinicians.
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Affiliation(s)
- A Alfuraih
- Department of Radiological Sciences. College of Applied Medical Sciences. King Saud University, PO Box 10219, Riyadh 11433, Saudi Arabia
| | - O Kadri
- Research Laboratory on Energy and Matter for Nuclear Science Development (LR16CNSTN02), National Center for Nuclear Science and Technologies, Sidi Thabet Technopark 2020, Tunis, Tunisia.
| | - F Fakhouri
- Department of Biomedical Technology, College of Applied Medical Sciences, King Saud University, Riyadh 12372, Saudi Arabia
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Liu C, Sun H, Lin F. The application of three-dimensional custom-made prostheses in chest wall reconstruction after oncologic sternal resection. J Surg Oncol 2024; 129:1063-1072. [PMID: 38311813 DOI: 10.1002/jso.27597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 12/19/2023] [Accepted: 01/19/2024] [Indexed: 02/06/2024]
Abstract
BACKGROUND AND OBJECTIVES As one of the cutting-edge advances in the field of reconstruction, three-dimensional (3D) printing technology has been constantly being attempted to assist in the reconstruction of complicated large chest wall defects. However, there is little literature assessing the treatment outcomes of 3D printed prostheses for chest wall reconstruction. This study aimed to analyze the surgical outcomes of 3D custom-made prostheses for the reconstruction of oncologic sternal defects and to share our experience in the surgical management of these rare and complex cases. METHODS We summarized the clinical features of the sternal tumor in our center, described the surgical techniques of the application of 3D customized prosthesis for chest wall reconstruction, and analyzed the perioperative characteristics, complications, overall survival (OS), and recurrence-free survival of patients. RESULTS Thirty-two patients with the sternal tumor who underwent chest wall resection were identified, among which 13 patients used 3D custom-made titanium implants and 13 patients used titanium mesh for sternal reconstruction. 22 cases were malignant, and chondrosarcoma is the most common type. The mean age was 46.9 years, and 53% (17/32) of the patients were male. The average size of tumor was 6.4 cm, and the mean defect area was 76.4 cm2. 97% (31/32) patients received R0 resection. Complications were observed in 29% (9/32) of patients, of which wound infection (22%, 7/32) was the most common. The OS of the patients was 72% at 5 years. CONCLUSION We demonstrated that with careful preoperative assessment, 3D customized prostheses could be a viable alternative for complex sternal reconstruction.
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Affiliation(s)
- Chengxin Liu
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Haipeng Sun
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Feng Lin
- Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, China
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Katsiotis CS, Tikhomirov E, Leliopoulos C, Strømme M, Welch K. Development of a simple paste for 3D printing of drug formulations containing a mesoporous material loaded with a poorly water-soluble drug. Eur J Pharm Biopharm 2024; 198:114270. [PMID: 38537908 DOI: 10.1016/j.ejpb.2024.114270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Revised: 03/11/2024] [Accepted: 03/23/2024] [Indexed: 04/19/2024]
Abstract
Poorly soluble drugs represent a substantial portion of emerging drug candidates, posing significant challenges for pharmaceutical formulators. One promising method to enhance the drug's dissolution rate and, consequently, bioavailability involves transforming them into an amorphous state within mesoporous materials. These materials can then be seamlessly integrated into personalized drug formulations using Additive Manufacturing (AM) techniques, most commonly via Fused Deposition Modeling. Another innovative approach within the realm of AM for mesoporous material-based formulations is semi-solid extrusion (SSE). This study showcases the feasibility of a straightforward yet groundbreaking hybrid 3D printing system employing SSE to incorporate drug-loaded mesoporous magnesium carbonate (MMC) into two different drug formulations, each designed for distinct administration routes. MMC was loaded with the poorly water-soluble drug ibuprofen via a solvent evaporation method and mixed with PEG 400 as a binder and lubricant, facilitating subsequent SSE. The formulation is non-aqueous, unlike most pastes which are used for SSE, and thus is beneficial for the incorporation of poorly water-soluble drugs. The 3D printing process yielded tablets for oral administration and suppositories for rectal administration, which were then analyzed for their dissolution behavior in biorelevant media. These investigations revealed enhancements in the dissolution kinetics of the amorphous drug-loaded MMC formulations. Furthermore, an impressive drug loading of 15.3 % w/w of the total formulation was achieved, marking the highest reported loading for SSE formulations incorporating mesoporous materials to stabilize drugs in their amorphous state by a wide margin. This simple formulation containing PEG 400 also showed advantages over other aqueous formulations for SSE in that the formulations did not exhibit weight loss or changes in size or form during the curing process post-printing. These results underscore the substantial potential of this innovative hybrid 3D printing system for the development of drug dosage forms, particularly for improving the release profile of poorly water-soluble drugs.
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Affiliation(s)
- Christos S Katsiotis
- Division of Nanotechnology and Functional Materials, Department of Materials Science and Engineering, Uppsala University, Box 35, Uppsala SE-751 03, Sweden.
| | - Evgenii Tikhomirov
- Division of Nanotechnology and Functional Materials, Department of Materials Science and Engineering, Uppsala University, Box 35, Uppsala SE-751 03, Sweden.
| | - Christos Leliopoulos
- Division of Macromolecular Chemistry, Department of Chemistry, Uppsala University, Box 538, SE-751 21, Sweden.
| | - Maria Strømme
- Division of Nanotechnology and Functional Materials, Department of Materials Science and Engineering, Uppsala University, Box 35, Uppsala SE-751 03, Sweden.
| | - Ken Welch
- Division of Nanotechnology and Functional Materials, Department of Materials Science and Engineering, Uppsala University, Box 35, Uppsala SE-751 03, Sweden.
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Zhang C, Meng J, Zhang L, Fan S, Yi Y, Zhang J, Wu G. Influence of 3D printed surface micro-structures on molding performance and dental bonding properties of zirconia. J Dent 2024; 144:104937. [PMID: 38479706 DOI: 10.1016/j.jdent.2024.104937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 02/27/2024] [Accepted: 03/10/2024] [Indexed: 03/18/2024] Open
Abstract
OBJECTIVES To investigate the influence of the 3D printed micro-structured surfaces on the bond strength of zirconia to resin cement. METHODS Zirconia specimens were divided into five groups based on manufacturing technique and surface preparation: (1) milled zirconia (M group); (2) milled zirconia airborne abraded (MA group); (3) printed zirconia (M group); (4) printed zirconia airborne abraded (PA group); and (5) printed zirconia with micro-structured surface (PM group). The surface morphology, cross-sectional morphology, and elemental composition were observed using a scanning electron microscope (SEM). Surface roughness was measured using a laser scanning confocal microscope (SLCM). Shear bond strength (SBS) was measured using a universal testing machine after bonding resin cement (n = 10). The failure modes of the bonded fracture interfaces were observed and counted using a stereomicroscope and a SEM. In addition, boundary dimensional accuracy (n = 10) and micro-structural dimensional accuracy (n = 20) of printed zirconia specimens with micro-structured surfaces were measured using digital calipers and Fiji software. The crystalline phase changes before and after surface treatment were investigated using X-ray diffractometry. Data was analysed using one-way ANOVA and Tukey HSD post-hoc tests (α = 0.05). RESULT The surface micro-structures of the PM group had regular morphology and no obvious defects. The surface roughness results showed that the PM group had higher Sa (42.21±1.38 um) and Ra (21.25±1.80 um) values than the other four groups (p < 0.001). The SBS test showed that the bond strength of the PM group reached 11.23 ± 0.66 MPa, which was 55.97% (p < 0.001) higher than that of the P group (7.20 ± 1.14 MPa). The boundary dimensional accuracy of the PM group was proficient (diameter: 99.63 ± 0.31%, thickness: 98.05 ± 1.12%), and the actual fabrication dimensions of the hexagonal micro-structures reached 77.45%-80.01% of the original design. The micro-structured surface did not affect the crystalline phase of zirconia. CONCLUSIONS The current study illustrates that 3D-printed microstructured surfaces effectively improve the bond strength of zirconia to resin cements. CLINICAL SIGNIFICANCE With the advantage of 3D printing, this study provides a new idea for improving the bonding properties of zirconia.
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Affiliation(s)
- Cunliang Zhang
- Department of Prosthodontics, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Jiali Meng
- Digital Engineering Center of Stomatology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Li Zhang
- Department of Prosthodontics, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Siyu Fan
- Department of Prosthodontics, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Yingjie Yi
- Digital Engineering Center of Stomatology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Jiaqi Zhang
- Digital Engineering Center of Stomatology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Guofeng Wu
- Department of Prosthodontics, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China; Digital Engineering Center of Stomatology, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
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Galindo-Rodriguez GR, Sarwar MS, Rios-Solis L, Dimartino S. Development, characterization and application of 3D printed adsorbents for in situ recovery of taxadiene from microbial cultivations. J Chromatogr A 2024; 1721:464815. [PMID: 38522406 DOI: 10.1016/j.chroma.2024.464815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 03/06/2024] [Accepted: 03/11/2024] [Indexed: 03/26/2024]
Abstract
Microbial cell factories are an attractive alternative to produce high-value natural products using sustainable processes. However, product recovery is one of the main challenges to reduce production cost and make these technologies economically interesting. In this work, new resins were formulated to 3D print hydrophobic adsorbents for the recovery of biologics from microbial cultivations. Benzyl methacrylate (BEMA) and butyl methacrylate (BUMA) were selected as functional monomers suitable for the adsorption of hydrophobic compounds. Pore morphology was tailored through the inclusion of pore forming agents (porogens) in the resin. Different porogens and porogen concentrations were evaluated resulting in materials with different porous networks. Sudan 1 and the anticancer drug paclitaxel were employed as model compounds to test the adsorption performance of hydrophobic and terpene molecules onto the developed 3D printed materials. The material with greatest adsorption capacity was obtained using BEMA monomer with 40 % (v/v) porogen (BEMA40). The performance of BEMA40 to recover taxadiene from small-scale (5 mL) Saccharomyces cerevisiae cultivations was tested and compared with commercial Diaion HP-20 beads. Taxadiene titres on BEMA40 (46 ± 2 mg/L) and Diaion HP-20 (54 ± 4 mg/L) were comparable, with no taxadiene detected in the cells and cell-free media, suggesting near 100 % taxadiene partition on the adsorbents. Compared to commercial beads, 3D printed adsorbents can be customized with adjustments in the resin formulation, are well adaptable to diverse bioreactor types, do not clog sampling ports and columns and are easier to handle during post processing. The results of this work demonstrate the potential of 3D printing to fabricate hydrophobic interaction adsorbent materials and their application in the recovery of biological products.
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Affiliation(s)
| | - M Sulaiman Sarwar
- Institute for Bioengineering, School of Engineering, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
| | - Leonardo Rios-Solis
- Institute for Bioengineering, School of Engineering, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom; Centre for Engineering Biology, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom
| | - Simone Dimartino
- Institute for Bioengineering, School of Engineering, The University of Edinburgh, Edinburgh EH9 3BF, United Kingdom.
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Zgouro P, Katsamenis OL, Moschakis T, Eleftheriadis GK, Kyriakidis AS, Chachlioutaki K, Kyriaki Monou P, Ntorkou M, Zacharis CK, Bouropoulos N, Fatouros DG, Karavasili C, Gioumouxouzis CI. A floating 3D printed polypill formulation for the coadministration and sustained release of antihypertensive drugs. Int J Pharm 2024; 655:124058. [PMID: 38552754 DOI: 10.1016/j.ijpharm.2024.124058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/24/2024] [Accepted: 03/26/2024] [Indexed: 04/06/2024]
Abstract
Polypharmacy is a common issue, especially among elderly patients resulting in administration errors and patient inconvenience. Hypertension is a prevalent health condition that frequently leads to polypharmacy, as its treatment typically requires the co-administration of more than one different Active Pharmaceutical Ingredients (API's). To address these issues, floating hollow torus-shaped dosage forms were developed, aiming at providing prolonged gastric retention and sustained drug release. The dosage forms (polypills) containing three anti-hypertensive API's (diltiazem (DIL), propranolol (PRP) and hydrochlorothiazide (HCTZ)) were created via Fused Deposition Modelling 3D printing. A multitude of the dosage forms were loaded into a capsule and the resulting formulation achieved prolonged retention times over a 12-hour period in vitro, by leveraging both the buoyancy of the dosage forms, and the "cheerios effect" that facilitates the aggregation and retention of the dosage forms via a combination of surface tension and shape of the objects. Physicochemical characterization methods and imaging techniques were employed to investigate the properties and the internal and external structure of the dosage forms. Furthermore, an ex vivo porcine stomach model revealed substantial aggregation, adhesion and retention of the 3D printed dosage forms in porcine stomach. In vitro dissolution testing demonstrated almost complete first-order release of PRP and DIL (93.52 % and 99.9 %, respectively) and partial release of HCTZ (65.22 %) in the 12 h timeframe. Finally, a convolution-based single-stage approach was employed in order to predict the pharmacokinetic (PK) parameters of the API's of the formulation and the resemblance of their PK behavior with previously reported data.
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Affiliation(s)
- Paola Zgouro
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, GR-54124, Thessaloniki, Greece
| | - Orestis L Katsamenis
- μ-VIS X-Ray Imaging Centre, Faculty of Engineering and Physical Sciences, University of Southampton, Southampton, SO17 1BJ, UK; Institute for Life Sciences, University of Southampton, University Rd, Highfield, Southampton, SO17 1BJ, UK
| | - Thomas Moschakis
- Department of Food Science and Technology, School of Agriculture, Aristotle University of Thessaloniki, GR-541 24 Thessaloniki, Greece
| | - Georgios K Eleftheriadis
- Pharmacare Premium Limited, R&D Department, HHF003 Hal Far Industrial Estate, Birzebbugia BBG3000, Malta
| | - Athanasios S Kyriakidis
- Pharmacare Premium Limited, R&D Department, HHF003 Hal Far Industrial Estate, Birzebbugia BBG3000, Malta
| | - Konstantina Chachlioutaki
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, GR-54124, Thessaloniki, Greece; Center for Interdisciplinary Research and Innovation (CIRI-AUTH), 57001 Thessaloniki, Greece
| | - Paraskevi Kyriaki Monou
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, GR-54124, Thessaloniki, Greece; Center for Interdisciplinary Research and Innovation (CIRI-AUTH), 57001 Thessaloniki, Greece
| | - Marianna Ntorkou
- Laboratory of Pharmaceutical Analysis, Department of Pharmacy, Aristotle University of Thessaloniki, GR-54124, Greece
| | - Constantinos K Zacharis
- Laboratory of Pharmaceutical Analysis, Department of Pharmacy, Aristotle University of Thessaloniki, GR-54124, Greece
| | - Nikolaos Bouropoulos
- Department of Materials Science,University of Patras, 26504 Rio, Patras,Greece; Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes, Patras, Greece
| | - Dimitrios G Fatouros
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, GR-54124, Thessaloniki, Greece; Center for Interdisciplinary Research and Innovation (CIRI-AUTH), 57001 Thessaloniki, Greece
| | - Christina Karavasili
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, GR-54124, Thessaloniki, Greece
| | - Christos I Gioumouxouzis
- Laboratory of Pharmaceutical Technology, Department of Pharmaceutical Sciences, Aristotle University of Thessaloniki, GR-54124, Thessaloniki, Greece.
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Junnila A, Mortier L, Arbiol A, Harju E, Tomberg T, Hirvonen J, Viitala T, Karttunen AP, Peltonen L. Rheological insights into 3D printing of drug products: Drug nanocrystal-poloxamer gels for semisolid extrusion. Int J Pharm 2024; 655:124070. [PMID: 38554740 DOI: 10.1016/j.ijpharm.2024.124070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Revised: 03/27/2024] [Accepted: 03/27/2024] [Indexed: 04/02/2024]
Abstract
The importance of ink rheology to the outcome of 3D printing is well recognized. However, rheological properties of printing inks containing drug nanocrystals have not been widely investigated. Therefore, the objective of this study was to establish a correlation between the composition of nanocrystal printing ink, the ink rheology, and the entire printing process. Indomethacin was used as a model poorly soluble drug to produce nanosuspensions with improved solubility properties through particle size reduction. The nanosuspensions were further developed into semisolid extrusion 3D printing inks with varying nanocrystal and poloxamer 407 concentrations. Nanocrystals were found to affect the rheological properties of the printing inks both by being less self-supporting and having higher yielding resistances. During printing, nozzle blockages occurred. Nevertheless, all inks were found to be printable. Finally, the rheological properties of the inks were successfully correlated with various printing and product properties. Overall, these experiments shed new light on the rheological properties of printing inks containing nanocrystals.
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Affiliation(s)
- Atte Junnila
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland.
| | - Laurence Mortier
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland; Laboratory of Pharmaceutical Technology, Faculty of Pharmaceutical Sciences, Ghent University, Ghent, Belgium
| | - Alba Arbiol
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Elina Harju
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Teemu Tomberg
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Jouni Hirvonen
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Tapani Viitala
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland; Pharmaceutical Sciences Laboratory, Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
| | - Anssi-Pekka Karttunen
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
| | - Leena Peltonen
- Division of Pharmaceutical Chemistry and Technology, Faculty of Pharmacy, § ,University of Helsinki, Helsinki, Finland
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Leão J, Winck VL, Petzhold CL, Collares FM, de Andrade DF, Beck RCR. Pimobendan controlled release guar gum printlets: Tailoring drug doses for personalised veterinary medicines. Int J Pharm 2024; 655:124017. [PMID: 38508429 DOI: 10.1016/j.ijpharm.2024.124017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2024] [Revised: 03/16/2024] [Accepted: 03/17/2024] [Indexed: 03/22/2024]
Abstract
Treating chronic heart diseases in dogs is challenging due to variations in mass within and between species. Pimobendan (PBD), a veterinary drug only, is prescribed in specific cases of chronic heart disease in dogs and is available on the market in only a few different doses. Furthermore, the therapy itself is challenging due to the large size of the chewable tablets and the requirement for twice-daily administration. The development of customised and on-demand PBD medicines by three-dimensional (3D) printing has been proposed to circumvent these disadvantages. In this study, we designed controlled-release flavoured printlets containing PBD. We evaluated the use of two natural polymers, guar or xanthan gums, as the main component of the printing inks. Guar gum showed the better rheological behavior and printability by semisolid extrusion. The printlets were produced in three different shapes and sizes to allow dose customisation. Guar gum printlets showed a PBD controlled release profile, regardless of their shape or size. Therefore, we have demonstrated a novel approach for controlling PBD drug release and tailoring the dose by employing a natural polymer to produce 3D-printed tablets. This study represents a significant step towards the development of 3D-printed guar gum controlled-release formulations for veterinary applications.
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Affiliation(s)
- Júlia Leão
- Programa de Pós-Graduação Em Ciências Farmacêuticas, Faculdade de Farmácia Universidade Federal do Rio Grande do Sul, Avenida Ipiranga, 2752, Porto Alegre, Rio Grande do Sul 90610-000, Brazil; Laboratório de Nanocarreadores e Impressão 3D Em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brasil
| | - Valeria Luiza Winck
- Laboratório de Nanocarreadores e Impressão 3D Em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brasil
| | - Cesar Liberato Petzhold
- Instituto de Química, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gonçalves - Agronomia, Porto Alegre, RS 90650-001, Brazil
| | - Fabricio Mezzomo Collares
- Laboratório de Materiais Dentários, Faculdade de Odontologia, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2492, Porto Alegre, RS, Brazil
| | - Diego Fontana de Andrade
- Programa de Pós-Graduação Em Ciências Farmacêuticas, Faculdade de Farmácia Universidade Federal do Rio Grande do Sul, Avenida Ipiranga, 2752, Porto Alegre, Rio Grande do Sul 90610-000, Brazil; Laboratório de Nanocarreadores e Impressão 3D Em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brasil
| | - Ruy Carlos Ruver Beck
- Programa de Pós-Graduação Em Ciências Farmacêuticas, Faculdade de Farmácia Universidade Federal do Rio Grande do Sul, Avenida Ipiranga, 2752, Porto Alegre, Rio Grande do Sul 90610-000, Brazil; Laboratório de Nanocarreadores e Impressão 3D Em Tecnologia Farmacêutica (Nano3D), Faculdade de Farmácia, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brasil.
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Labakoum B, Farhan A, Taleb LB, Mouhsen A, Lyazidi A. Effects of autoclaving and disinfection on 3D surgical guides using LCD technology for dental implant. 3D Print Med 2024; 10:14. [PMID: 38656429 DOI: 10.1186/s41205-024-00214-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 04/04/2024] [Indexed: 04/26/2024] Open
Abstract
BACKGROUND Surgical guides can improve the precision of implant placement and minimize procedural errors and their related complications. This study aims to determine how different disinfection and sterilization methods affect the size changes of drill guide templates and the mechanical properties of 3D-printed surgical guides made with LCD technology. METHODS We produced a total of 100 samples. Forty surgical guides were fabricated to assess the implant drill guides' surface and geometric properties. We subjected sixty samples to mechanical tests to analyze their tensile, flexural, and compressive properties. We classified the samples into four groups based on each analytical method: GC, which served as the control group; GA, which underwent autoclave sterilization at 121 °C (+ 1 bar, 20 min); GB, which underwent autoclave sterilization at 134 °C (+ 2 bar, 10 min); and GL, which underwent disinfection with 70% isopropyl alcohol for 20 min. RESULT The results show that sterilization at 121 °C and 134 °C affects the mechanical and geometric characteristics of the surgical guides, while disinfection with 70% isopropyl alcohol gives better results. CONCLUSION Our study of 3D-printed surgical guides using LCD technology found that sterilization at high temperatures affects the guides' mechanical and geometric properties. Instead, disinfection with 70% isopropyl alcohol is recommended.
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Affiliation(s)
- Badreddine Labakoum
- Radiation-Matter & Instrumentation Laboratory (RMI), Faculty of Science and Technology, University Hassan 1st, Settat, Morocco.
- Health Sciences and Techniques Laboratory, Higher Institute of Health Sciences (ISSS), University Hassan 1st, Settat, Morocco.
| | - Amr Farhan
- Radiation-Matter & Instrumentation Laboratory (RMI), Faculty of Science and Technology, University Hassan 1st, Settat, Morocco
- Health Sciences and Techniques Laboratory, Higher Institute of Health Sciences (ISSS), University Hassan 1st, Settat, Morocco
| | - Lhoucine Ben Taleb
- Radiation-Matter & Instrumentation Laboratory (RMI), Faculty of Science and Technology, University Hassan 1st, Settat, Morocco
| | - Azeddine Mouhsen
- Radiation-Matter & Instrumentation Laboratory (RMI), Faculty of Science and Technology, University Hassan 1st, Settat, Morocco
| | - Aissam Lyazidi
- Radiation-Matter & Instrumentation Laboratory (RMI), Faculty of Science and Technology, University Hassan 1st, Settat, Morocco.
- Health Sciences and Techniques Laboratory, Higher Institute of Health Sciences (ISSS), University Hassan 1st, Settat, Morocco.
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Van den Borre C, De Neef B, Loomans NAJ, Rinaldi M, Nout E, Bouvry P, Naert I, Van Stralen KJ, Mommaerts MY. Soft Tissue Response and Determination of Underlying Risk Drivers for Recession and Mucositis after AMSJI Implantation in the Maxilla. Int J Oral Maxillofac Implants 2024; 39:302-309. [PMID: 37910836 DOI: 10.11607/jomi.10490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023] Open
Abstract
PURPOSE To evaluate the soft tissue response to the placement of additively manufactured subperiosteal jaw implants (AMSJI) in the severely atrophic maxilla and to identify possible risk factors for soft tissue breakdown. MATERIALS AND METHODS An international multicenter study was conducted, and 15 men (mean age: 64.62 years; SD: ± 6.75) and 25 women (mean age: 65.24 years; SD: ± 6.77) with advanced maxillary jaw resorption (Cawood and Howell Class V or more) were included in this study. General patient data were collected, and all subjects were clinically examined. Inclusion criteria were patients who underwent bilateral AMSJI placement in the maxilla at least 1 year prior. Exclusion criteria were patients who did not have patient, surgeon, or dentist consent to participate in the study before their inclusion. RESULTS A total of 40 patients were enrolled, with a mean follow-up period of 917 days (SD: ± 306.89 days). Primary implant stability was achieved postoperatively in all cases, and all implants were loaded with a final prosthesis. At the time of the study, only 1 patient showed mobility (> 1 mm) of the bilateral AMSJI. Due to mucosal recession, exposure of the framework was seen in 26 patients (65%) and was mainly in the left (21.43% of 26) and right (18.57% of 26) midlateral region. A thin biotype and the presence of mucositis were found to be risk factors (P < .05). Although not significant, smokers had a risk of developing a recession that was nearly seven times (odds ratio: 6.88; P = .08) greater than that of nonsmokers. CONCLUSIONS Twenty-six (65%) patients presented with a recession in one (or more) of the seven regions after oral rehabilitation with bilateral AMSJI placement. Several risk drivers were evaluated. The collapse of soft tissues around the AMSJI that led to caudal exposure of the arms was correlated with a thin biotype and the presence of mucositis.
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Bagde A, Mosley-Kellum K, Spencer S, Singh M. 3D DLP-printed cannabinoid microneedles patch and its pharmacokinetic evaluation in rats. J Pharm Pharmacol 2024:rgae043. [PMID: 38656627 DOI: 10.1093/jpp/rgae043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 04/05/2024] [Indexed: 04/26/2024]
Abstract
OBJECTIVE The objective of the present study was to enhance the bioavailability of cannabidiol (CBD) using 3D Digital Light Processing (DLP)-printed microneedle (MN) transdermal drug delivery system. METHODS CBD MN patch was fabricated and optimized using 3D DLP printing using CBD (8% w/v), Lithium phenyl-2,4,6-trimethylbenzoylphosphinate (LAP) (0.49% w/v), distilled water (20% w/v), and poly (ethylene glycol) dimethacrylate 550 (PEGDAMA 550) (up to 100% w/v). CBD MNs were characterized for their morphology, mechanical strength, in vitro release study, ex vivo permeation study, and in vivo pharmacokinetic (PK) profile. KEY FINDINGS Microscopic images showed that sharp CBD MNs with a height of ~800 μm, base diameter of ~250 μm, and tip with a radius of curvature (RoC) of ~15 μm were successfully printed using optimized printing parameters. Mechanical strength studies showed no significant deformation in the morphology of CBD MNs even after applying 0.5N/needle force. Ex vivo permeation study showed significant (P < .0001) permeation of CBD in the receiving media as compared to CBD patch (control). In vivo PK study showed significantly (P < .05) enhanced bioavailability in the case of CBD MN patch as compared to CBD subcutaneous inj. (control). CONCLUSION Overall, systemic absorption of CBD was significantly enhanced using 3D-printed MN drug delivery system.
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Affiliation(s)
- Arvind Bagde
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL, United States
| | - Keb Mosley-Kellum
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL, United States
| | - Shawn Spencer
- PCOM School of Pharmacy, Philadelphia College of Osteopathic Medicine (PCOM), Philadelphia, PA 19131, United States
| | - Mandip Singh
- College of Pharmacy and Pharmaceutical Sciences, Florida A&M University, Tallahassee, FL, United States
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Yang SH, Chen CY, Liu WL, Liu HW, Chao KY. Development of a Cost-Effective 3D-Printed Airway Suction Simulator for Respiratory Therapy Students. Respir Care 2024; 69:549-556. [PMID: 38167213 DOI: 10.4187/respcare.11277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
BACKGROUND Three-dimensional (3D)-printed models are cost-effective and can be customized by trainers. This study designed a 3D-printed airway suction simulator for use by respiratory therapy (RT) students. The objective was to demonstrate the cost-effectiveness and application of 3D-printed models in respiratory care training, aiming to enhance the educational experience for RT students. METHODS This study developed a 3D-printed airway suction simulator that was cost-effective. A randomized controlled trial was conducted involving RT students to compare effectiveness in a 3D-model group and a control group. Skill assessments and written examinations were used to evaluate the participants' knowledge and skills. RESULTS A total of 38 second-year RT students were randomly assigned to either the 3D-model group (n = 19) or the control group (n = 19). One participant in the 3D-model group was lost to follow-up during the planned direct observation of procedural skills (DOPS) assessment and satisfaction questionnaire completion. The posttest written examination scores were significantly higher in the 3D-model group than in the control group (100% vs 80%, P = .02). The scores from the DOPS and satisfaction questionnaire were comparable in the 2 groups. CONCLUSIONS This study demonstrated that 3D printing can be used to create a safe and cost-effective airway suction simulator for use by RT students, with potential to enhance training methods. Further research is necessary.
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Affiliation(s)
- Shih-Hsing Yang
- Department of Respiratory Therapy, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City, Taiwan; and Department of Respiratory Therapy, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Chao-Yu Chen
- Department of Respiratory Therapy, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City, Taiwan; and Department of Life Science, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Wei-Lun Liu
- School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan; Department of Critical Care Medicine, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City, Taiwan; and Data Science Center, College of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Hsia-Wei Liu
- Department of Life Science, Fu Jen Catholic University, New Taipei City, Taiwan; and Graduate Institute of Applied Science and Engineering, Fu Jen Catholic University, New Taipei City, Taiwan
| | - Ke-Yun Chao
- Department of Respiratory Therapy, Fu Jen Catholic University Hospital, Fu Jen Catholic University, New Taipei City, Taiwan; School of Physical Therapy, Graduate Institute of Rehabilitation Sciences, Chang Gung University, Taoyuan, Taiwan; and Artificial Intelligence Development Center, Fu Jen Catholic University, New Taipei City, Taiwan.
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Zhao ZH, Chen SY, Zhao PC, Luo WL, Luo YL, Zuo JL, Li CH. Mechanically Adaptive Polymers Constructed from Dynamic Coordination Equilibria. Angew Chem Int Ed Engl 2024; 63:e202400758. [PMID: 38450854 DOI: 10.1002/anie.202400758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/06/2024] [Accepted: 03/06/2024] [Indexed: 03/08/2024]
Abstract
Designing materials capable of adapting their mechanical properties in response to external stimuli is the key to preventing failure and extending their service life. However, existing mechanically adaptive polymers are hindered by limitations such as inadequate load-bearing capacity, difficulty in achieving reversible changes, high cost, and a lack of multiple responsiveness. Herein, we address these challenges using dynamic coordination bonds. A new type of mechanically adaptive material with both rate- and temperature-responsiveness was developed. Owing to the stimuli-responsiveness of the coordination equilibria, the prepared polymers, PBMBD-Fe and PBMBD-Co, exhibit mechanically adaptive properties, including temperature-sensitive strength modulation and rate-dependent impact hardening. Benefitting from the dynamic nature of the coordination bonds, the polymers exhibited impressive energy dissipation, damping capacity (loss factors of 1.15 and 2.09 at 1.0 Hz), self-healing, and 3D printing abilities, offering durable and customizable impact resistance and protective performance. The development of impact-resistant materials with comprehensive properties has potential applications in the sustainable and intelligent protection fields.
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Affiliation(s)
- Zi-Han Zhao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, P. R. China
| | - Shi-Yi Chen
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Pei-Chen Zhao
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Wen-Lin Luo
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Yan-Long Luo
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
- College of Science, Nanjing Forestry University, Nanjing, 210037, P. R. China
| | - Jing-Lin Zuo
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
| | - Cheng-Hui Li
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China
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Li CJ, Park JH, Jin GS, Mandakhbayar N, Yeo D, Lee JH, Lee JH, Kim HS, Kim HW. Strontium/Silicon/Calcium-Releasing Hierarchically Structured 3D-Printed Scaffolds Accelerate Osteochondral Defect Repair. Adv Healthc Mater 2024:e2400154. [PMID: 38647029 DOI: 10.1002/adhm.202400154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 03/24/2024] [Indexed: 04/25/2024]
Abstract
Articular cartilage defects are a global challenge, causing substantial disability. Repairing large defects is problematic, often exceeding cartilage's self-healing capacity and damaging bone structures. To tackle this problem, we develop a scaffold-mediated therapeutic ion delivery system. These scaffolds are constructed from poly(ε-caprolactone) and strontium (Sr)-doped bioactive nanoglasses (SrBGn), creating a unique hierarchical structure featuring macro-pores from 3D printing, micro-pores, and nano-topologies due to SrBGn integration. The SrBGn-embedded scaffolds (SrBGn-μCh) release Sr, silicon (Si), and calcium (Ca) ions, which improve chondrocyte activation, adhesion, proliferation, and maturation-related gene expression. This multiple ion delivery significantly affects metabolic activity and maturation of chondrocytes. Importantly, Sr ions may play a role in chondrocyte regulation through the Notch signaling pathway. Notably, the scaffold's structure and topological cues expedite the recruitment, adhesion, spreading, and proliferation of chondrocytes and bone marrow-derived mesenchymal stem cells. Si and Ca ions accelerate osteogenic differentiation and blood vessel formation, while Sr ions enhance the polarization of M2 macrophages. Our findings show that SrBGn-μCh scaffolds accelerate osteochondral defect repair by delivering multiple ions and providing structural/topological cues, ultimately supporting host cell functions and defect healing. This scaffold holds great promise for osteochondral repair applications. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Cheng Ji Li
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jeong-Hui Park
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea
| | - Gang Shi Jin
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea
| | - Nandin Mandakhbayar
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea
| | - Donghyeon Yeo
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jun Hee Lee
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Dankook Physician Scientist Research Center, Dankook University Hospital, Cheonan, 31116, Republic of Korea
- Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, Chungcheognam-do, 31116, Republic of Korea
- Cell & Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea
| | - Jung-Hwan Lee
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Dankook Physician Scientist Research Center, Dankook University Hospital, Cheonan, 31116, Republic of Korea
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, Chungcheognam-do, 31116, Republic of Korea
- Cell & Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea
| | - Hye Sung Kim
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Dankook Physician Scientist Research Center, Dankook University Hospital, Cheonan, 31116, Republic of Korea
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, Chungcheognam-do, 31116, Republic of Korea
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering, Dankook University, Cheonan, 31116, Republic of Korea
- Department of Nanobiomedical Science and BK21 PLUS NBM Global Research Center for Regenerative Medicine, Dankook University, Cheonan, 31116, Republic of Korea
- Dankook Physician Scientist Research Center, Dankook University Hospital, Cheonan, 31116, Republic of Korea
- Department of Biomaterials Science, College of Dentistry, Dankook University, Cheonan, 31116, Republic of Korea
- Mechanobiology Dental Medicine Research Center, Dankook University, Cheonan, Chungcheognam-do, 31116, Republic of Korea
- Cell & Matter Institute, Dankook University, Cheonan, 31116, Republic of Korea
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Duarte LC, Figueredo F, Chagas CLS, Cortón E, Coltro WKT. A review of the recent achievements and future trends on 3D printed microfluidic devices for bioanalytical applications. Anal Chim Acta 2024; 1299:342429. [PMID: 38499426 DOI: 10.1016/j.aca.2024.342429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 02/25/2024] [Accepted: 02/26/2024] [Indexed: 03/20/2024]
Abstract
3D printing has revolutionized the manufacturing process of microanalytical devices by enabling the automated production of customized objects. This technology promises to become a fundamental tool, accelerating investigations in critical areas of health, food, and environmental sciences. This microfabrication technology can be easily disseminated among users to produce further and provide analytical data to an interconnected network towards the Internet of Things, as 3D printers enable automated, reproducible, low-cost, and easy fabrication of microanalytical devices in a single step. New functional materials are being investigated for one-step fabrication of highly complex 3D printed parts using photocurable resins. However, they are not yet widely used to fabricate microfluidic devices. This is likely the critical step towards easy and automated fabrication of sophisticated, complex, and functional 3D-printed microchips. Accordingly, this review covers recent advances in the development of 3D-printed microfluidic devices for point-of-care (POC) or bioanalytical applications such as nucleic acid amplification assays, immunoassays, cell and biomarker analysis and organs-on-a-chip. Finally, we discuss the future implications of this technology and highlight the challenges in researching and developing appropriate materials and manufacturing techniques to enable the production of 3D-printed microfluidic analytical devices in a single step.
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Affiliation(s)
- Lucas C Duarte
- Instituto de Química, Universidade Federal de Goiás, 74690-900, Goiânia, GO, Brazil; Instituto Federal de Educação, Ciência e Tecnologia de Goiás, Campus Inhumas, 75402-556, Inhumas, GO, Brazil
| | - Federico Figueredo
- Laboratorio de Biosensores y Bioanalisis (LABB), Departamento de Química Biológica e IQUIBICEN-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, CABA, Argentina
| | - Cyro L S Chagas
- Instituto de Química, Universidade de Brasília, 70910-900, Brasília, DF, Brazil
| | - Eduardo Cortón
- Laboratorio de Biosensores y Bioanalisis (LABB), Departamento de Química Biológica e IQUIBICEN-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, CABA, Argentina
| | - Wendell K T Coltro
- Instituto de Química, Universidade Federal de Goiás, 74690-900, Goiânia, GO, Brazil; Instituto Nacional de Ciência e Tecnologia de Bioanalítica, 13084-971, Campinas, SP, Brazil.
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Uchida DT, Bruschi ML. Pharmaceutical applications and requirements of resins for printing by digital light processing (DLP). Pharm Dev Technol 2024:1-19. [PMID: 38641968 DOI: 10.1080/10837450.2024.2345144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Accepted: 04/16/2024] [Indexed: 04/21/2024]
Abstract
The digital light processing (DLP) printer has proven to be effective in biomedical and pharmaceutical applications, as its printing method does not induce shear and a strong temperature on the resin. In addition, the DLP printer has good resolution and print quality, which makes it possible to print complex structures with a customized shape, being used for various purposes ranging from jewelry application to biomedical and pharmaceutical areas. The big disadvantage of DLP is the lack of a biocompatible and non-toxic resin on the market. To overcome this limitation, an ideal resin for biomedical and pharmaceutical use is needed. The resin must have appropriate properties, so that the desired format is printed when with a determined wavelength is applied. Thus, the aim of this work is to bring the basic characteristics of the resins used by this printing method and the minimum requirements to start printing by DLP for pharmaceutical and biomedical applications. The DLP method has proven to be effective in obtaining pharmaceutical devices such as drug delivery systems. Furthermore, this technology allows the printing of devices of ideal size, shape and dosage, providing the patient with personalized treatment.
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Affiliation(s)
- Denise Tiemi Uchida
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, Av. Colombo 5790, 87020-900, Maringa, Parana, Brazil
| | - Marcos Luciano Bruschi
- Laboratory of Research and Development of Drug Delivery Systems, Postgraduate Program in Pharmaceutical Sciences, Department of Pharmacy, State University of Maringa, Av. Colombo 5790, 87020-900, Maringa, Parana, Brazil
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Tanaka A, Kawaguchi T, Ito A, Isshi K, Hamanaka I, Tsuzuki T. Shear bond strength of ultraviolet-polymerized resin to 3D-printed denture materials: Effects of post-polymerization, surface treatments, and thermocycling. J Prosthodont Res 2024:JPR_D_23_00321. [PMID: 38644230 DOI: 10.2186/jpr.jpr_d_23_00321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/23/2024]
Abstract
PURPOSE The purpose of this study is to compare the shear bond strength of ultraviolet (UV)-polymerized resin to 3D-printed denture materials, both with and without post-polymerization. Moreover, the effects of surface treatment and thermocycling on shear bond strength after post-polymerization were investigated. METHODS Cylindrical 3D-printed denture bases and teeth specimens were prepared. The specimens are subjected to two tests. For Test 1, the specimens were bonded without any surface treatment or thermal stress for comparison with and without post-polymerization. In Test 2, specimens underwent five surface treatments: untreated (CON), ethyl acetate (EA), airborne particle abrasion (APA) with 50 μm (50-APA) and 110 μm alumina (110-APA), and tribochemical silica coating (TSC). A UV-polymerized resin was used for bonding. Half of the Test 2 specimens were thermocycled for 10,000 cycles. Shear bond strength was measured and analyzed using Kruskal-Wallis and Steel-Dwass tests (n = 8). RESULTS In Test 1, post-polymerization significantly reduced shear bond strength of both 3D-printed denture materials (P < 0.05). No notable difference was observed between the denture teeth and the bases (P > 0.05). In Test 2, before thermocycling, the CON and EA groups exhibited low bond strengths, while the 50-APA, 110-APA, and TSC groups exhibited higher bond strengths. Thermocycling did not reduce bond strength in the latter groups, but significantly reduced bond strength in the EA group (P < 0.001). CONCLUSIONS Post-polymerization can significantly reduce the shear bond strength of 3D-printed denture materials. Surface treatments, particularly APA and TSC, maintained bond strength even after thermocycling.
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Affiliation(s)
- Ami Tanaka
- Division of Removable Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan
| | - Tomohiro Kawaguchi
- Division of Removable Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan
- Department of Biomaterials Science and Turku Clinical Biomaterials Centre - TCBC, Institute of Dentistry, University of Turku, Turku, Finland
| | - Ayaka Ito
- Division of Removable Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan
| | - Kota Isshi
- Central Dental Laboratory, Fukuoka Dental College Medical & Dental Hospital, Fukuoka, Japan
| | - Ippei Hamanaka
- Division of Removable Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan
| | - Takashi Tsuzuki
- Division of Removable Prosthodontics, Department of Oral Rehabilitation, Fukuoka Dental College, Fukuoka, Japan
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Ghorbani F, Kim M, Ghalandari B, Zhang M, Varma SN, Schöbel L, Liu C, Boccaccini AR. Architecture of β-Lactoglobulin Coating Modulates Bioinspired Alginate Dialdehyde-Gelatine/Polydopamine Scaffolds for Subchondral Bone Regeneration. Acta Biomater 2024:S1742-7061(24)00209-5. [PMID: 38642788 DOI: 10.1016/j.actbio.2024.04.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/21/2024] [Accepted: 04/15/2024] [Indexed: 04/22/2024]
Abstract
In this study, we developed polydopamine (PDA)-functionalized alginate dialdehyde-gelatine (ADA-GEL) scaffolds for subchondral bone regeneration. These polymeric scaffolds were then coated with β-Lactoglobulin (β-LG) at concentrations of 1 mg/ml and 2 mg/ml. Morphological analysis indicated a homogeneous coating of the β-LG layer on the surface of network-like scaffolds. The β-LG-coated scaffolds exhibited improved swelling capacity as a function of the β-LG concentration. Compared to ADA-GEL/PDA scaffolds, the β-LG-coated scaffolds demonstrated delayed degradation and enhanced biomineralization. Here, a lower concentration of β-LG showed long-lasting stability and superior biomimetic hydroxyapatite mineralization. According to the theoretical findings, the single-state, representing the low concentration of β-LG, exhibited homogeneous distribution on the surface of the PDA, while the dimer-state (high concentration) displayed a high likelihood of uncontrolled interactions. β-LG-coated ADA-GEL/PDA scaffolds with a lower concentration of β-LG provided a biocompatible substrate that supported adhesion, proliferation, and alkaline phosphatase (ALP) secretion of sheep bone marrow mesenchymal stem cells, as well as increased expression of osteopontin (SPP1) and collagen type 1 (COL1A1) in human osteoblasts. These findings indicate the potential of protein-coated scaffolds for subchondral bone tissue regeneration. STATEMENT OF SIGNIFICANCE: This study addresses a crucial aspect of osteochondral defect repair, emphasizing the pivotal role of subchondral bone regeneration. The development of polydopamine-functionalized alginate dialdehyde-gelatine (ADA-GEL) scaffolds, coated with β-Lactoglobulin (β-LG), represents a novel approach to potentially enhance subchondral bone repair. β-LG, a milk protein rich in essential amino acids and bioactive peptides, is investigated for its potential to promote subchondral bone regeneration. This research explores computationally and experimentally the influence of protein concentration on the ordered or irregular deposition, unravelling the interplay between coating structure, scaffold properties, and in-vitro performance. This work contributes to advancing ordered protein coating strategies for subchondral bone regeneration, providing a biocompatible solution with potential implications for supporting subsequent cartilage repair.
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Affiliation(s)
- Farnaz Ghorbani
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany; Institute of Orthopaedic & Musculoskeletal Science, University College London, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, United Kingdom; Department of Translational Health Science, Bristol Medical School, University of Bristol, Bristol BS1 3NY, United Kingdom..
| | - Minjoo Kim
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany; Department of Orthopaedics and Trauma Surgery, Musculoskeletal University Center Munich (MUM), LMU University Hospital, LMU Munich, 80336 Munich, Germany
| | - Behafarid Ghalandari
- State Key Laboratory of Oncogenes and Related Genes, Institute for Personalized Medicine, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200030, China
| | - Mingjing Zhang
- Institute of Orthopaedic & Musculoskeletal Science, University College London, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, United Kingdom
| | - Swastina Nath Varma
- Institute of Orthopaedic & Musculoskeletal Science, University College London, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, United Kingdom
| | - Lisa Schöbel
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany
| | - Chaozong Liu
- Institute of Orthopaedic & Musculoskeletal Science, University College London, Royal National Orthopaedic Hospital, Stanmore HA7 4LP, United Kingdom.
| | - Aldo R Boccaccini
- Institute of Biomaterials, Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Cauerstrasse 6, 91058 Erlangen, Germany.
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Han Y, Wang H, Guan Y, Li S, Yuan Z, Lu L, Zheng X. High-precision 3D printing of multi-branch vascular scaffold with plasticized PLCL thermoplastic elastomer. Biomed Mater 2024. [PMID: 38636492 DOI: 10.1088/1748-605x/ad407c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
Three-dimensional (3D) printing has emerged as a transformative technology for tissue engineering, enabling the production of structures that closely emulate the intricate architecture and mechanical properties of native biological tissues. However, the fabrication of complex microstructures with high accuracy using biocompatible, degradable thermoplastic elastomers poses significant technical obstacles. This is primarily due to the inherent soft-matter nature of such materials, which complicates real-time control of micro-squeezing, resulting in low fidelity or even failure. In this study, we employ Poly (L-lactide-co-ε-caprolactone) (PLCL) as a model material and introduce a novel framework for high-precision 3D printing based on the material plasticization process. This approach significantly enhances the dynamic responsiveness of the start-stop transition during printing, thereby reducing harmful errors by up to 93%. Leveraging this enhanced material, we have efficiently fabricated arrays of multi-branched vascular scaffolds that exhibit exceptional morphological fidelity and possess elastic moduli that faithfully approximate the physiological modulus spectrum of native blood vessels, ranging from 2.5 to 45 MPa. The methodology we propose for the compatibilization and modification of elastomeric materials addresses the challenge of real-time precision control, representing a significant advancement in the domain of melt polymer 3D printing. This innovation holds considerable promise for the creation of detailed multi-branch vascular scaffolds and other sophisticated organotypic structures critical to advancing tissue engineering and regenerative medicine.
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Affiliation(s)
- Yunda Han
- Shenyang University of Technology, No.111, Shenliao West Road, Economic & Technological Development Zone, Shenyang, Shenyang, 110870, CHINA
| | - Heran Wang
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, No. 114, Nanta Street, Shenhe District, Shenyang, 110016, CHINA
| | - Yuheng Guan
- Harbin Institute of Technology, 92 Xidazhi Street, Nangang District, Harbin, 150001, CHINA
| | - Song Li
- 1State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, Shenyang 110016, China 2Institutes for Robotics and Intelligent Manufacturing, Chinese Academy of Sciences, Shenyang 110169, China, No. 114, Nanta Street, Shenhe District, Shenyang, 110016, CHINA
| | - Zewei Yuan
- Shenyang University of Technology, No.111, Shenliao West Road, Economic & Technological Development Zone, Shenyang, Shenyang, Liaoning, 110870, CHINA
| | - Lihua Lu
- Harbin Institute of Technology, 92 Xidazhi Street, Nangang District, Harbin, 150001, CHINA
| | - Xiongfei Zheng
- State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, No. 114, Nanta Street, Shenhe District, Shenyang, 110016, CHINA
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Entezari A, Wu Q, Mirkhalaf M, Lu Z, Roohani I, Li Q, Dunstan CR, Jiang X, Zreiqat H. Unraveling the influence of channel size and shape in 3D printed ceramic scaffolds on osteogenesis. Acta Biomater 2024:S1742-7061(24)00193-4. [PMID: 38642786 DOI: 10.1016/j.actbio.2024.04.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/31/2024] [Accepted: 04/11/2024] [Indexed: 04/22/2024]
Abstract
Bone has the capacity to regenerate itself for relatively small defects; however, this regenerative capacity is diminished in critical-size bone defects. The development of synthetic materials has risen as a distinct strategy to address this challenge. Effective synthetic materials to have emerged in recent years are bioceramic implants, which are biocompatible and highly bioactive. Yet nothing suitable for the repair of large bone defects has made the transition from laboratory to clinic. The clinical success of bioceramics has been shown to depend not only on the scaffold's intrinsic material properties but also on its internal porous geometry. This study aimed to systematically explore the implications of varying channel size, shape, and curvature in tissue scaffolds on in vivo bone regeneration outcomes. 3D printed bioceramic scaffolds with varying channel sizes (0.3 mm to 1.5 mm), shapes (circular vs rectangular), and curvatures (concave vs convex) were implanted in rabbit femoral defects for 8 weeks, followed by histological evaluation. We demonstrated that circular channel sizes of around 0.9 mm diameter significantly enhanced bone formation, compared to channel with diameters of 0.3 mm and 1.5 mm. Interestingly, varying channel shapes (rectangular vs circular) had no significant effect on the volume of newly formed bone. Furthermore, the present study systematically demonstrated the beneficial effect of concave surfaces on bone tissue growth in vivo, reinforcing previous in silico and in vitro findings. This study demonstrates that optimizing architectural configurations within ceramic scaffolds is crucial in enhancing bone regeneration outcomes. STATEMENT OF SIGNIFICANCE: Despite the explosion of work on developing synthetic scaffolds to repair bone defects, the amount of new bone formed by scaffolds in vivo remains suboptimal. Recent studies have illuminated the pivotal role of scaffolds' internal architecture in osteogenesis. However, these investigations have mostly remained confined to in silico and in vitro experiments. Among the in vivo studies conducted, there has been a lack of systematic analysis of individual architectural features. Herein, we utilized bioceramic 3D printing to conduct a systematic exploration of the effects of channel size, shape, and curvature on bone formation in vivo. Our results demonstrate the significant influence of channel size and curvature on in vivo outcomes. These findings provide invaluable insights into the design of more effective bone scaffolds.
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Affiliation(s)
- Ali Entezari
- School of Biomedical Engineering, Faculty of Engineering and Information Technology, University of Technology Sydney, NSW 2007, Australia; Biomaterials and Tissue Engineering Research Unit, School of Biomedical Engineering, The University of Sydney, NSW 2006, Australia
| | - Qianju Wu
- Department of Prosthodontics, Oral Bioengineering, and Regenerative Medicine Lab, Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai 200011, China
| | - Mohammad Mirkhalaf
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology, 2 George St Brisbane, QLD 4000, Australia
| | - Zufu Lu
- Biomaterials and Tissue Engineering Research Unit, School of Biomedical Engineering, The University of Sydney, NSW 2006, Australia
| | - Iman Roohani
- Biomaterials and Tissue Engineering Research Unit, School of Biomedical Engineering, The University of Sydney, NSW 2006, Australia
| | - Qing Li
- School of Aerospace, Mechanical and Mechatronic Engineering, The University of Sydney, Sydney, NSW 2006, Australia
| | - Colin R Dunstan
- Biomaterials and Tissue Engineering Research Unit, School of Biomedical Engineering, The University of Sydney, NSW 2006, Australia
| | - Xinquan Jiang
- Department of Prosthodontics, Oral Bioengineering, and Regenerative Medicine Lab, Ninth People's Hospital, Shanghai Jiao Tong University, Shanghai 200011, China.
| | - Hala Zreiqat
- Biomaterials and Tissue Engineering Research Unit, School of Biomedical Engineering, The University of Sydney, NSW 2006, Australia.
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