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Rodríguez-Pombo L, Gallego-Fernández C, Jørgensen AK, Parramon-Teixidó CJ, Cañete-Ramirez C, Cabañas-Poy MJ, Basit AW, Alvarez-Lorenzo C, Goyanes A. 3D printed personalized therapies for pediatric patients affected by adrenal insufficiency. Expert Opin Drug Deliv 2024:1-17. [PMID: 39268761 DOI: 10.1080/17425247.2024.2399706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Revised: 08/20/2024] [Accepted: 08/23/2024] [Indexed: 09/15/2024]
Abstract
BACKGROUND Adrenal insufficiency is usually diagnosed in children who will need lifelong hydrocortisone therapy. However, medicines for pediatrics, in terms of dosage and acceptability, are currently unavailable. RESEARCH DESIGN AND METHODS Semi-solid extrusion (SSE) 3D printing (3DP) was utilized for manufacturing of personalized and chewable hydrocortisone formulations (printlets) for an upcoming clinical study in children at Vall d'Hebron University Hospital in Barcelona, Spain. The 3DP process was validated using a specific software for dynamic dose modulation. RESULTS The printlets contained doses ranging from 1 to 6 mg hydrocortisone in three different flavor and color combinations to aid adherence among the pediatric patients. The pharma-ink (mixture of drugs and excipients) was assessed for its rheological behavior to ensure reproducibility of printlets through repeated printing cycles. The printlets showed immediate hydrocortisone release and were stable for 1 month of storage, adequate for prescribing instructions during the clinical trial. CONCLUSIONS The results confirm the suitability and safety of the developed printlets for use in the clinical trial. The required technical information from The Spanish Medicines Agency for this clinical trial application was compiled to serve as guidelines for healthcare professionals seeking to apply for and conduct clinical trials on 3DP oral dosage forms.
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Affiliation(s)
- Lucía Rodríguez-Pombo
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Instituto de Materiales (iMATUS) and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Concepción Gallego-Fernández
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Instituto de Materiales (iMATUS) and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | | | | | - Carme Cañete-Ramirez
- Pharmacy Department, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Maria Josep Cabañas-Poy
- Pharmacy Department, Vall d'Hebron Hospital Universitari, Vall d'Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Abdul W Basit
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, London, UK
- FABRX Ltd., Henwood House, Henwood, Ashford, Kent, UK
- FABRX Artificial Intelligence, Carretera de Escairón, 14, Currelos (O Saviñao), Spain
| | - Carmen Alvarez-Lorenzo
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Instituto de Materiales (iMATUS) and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Alvaro Goyanes
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Instituto de Materiales (iMATUS) and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, Santiago de Compostela, Spain
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, London, UK
- FABRX Ltd., Henwood House, Henwood, Ashford, Kent, UK
- FABRX Artificial Intelligence, Carretera de Escairón, 14, Currelos (O Saviñao), Spain
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2
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Lewandrowski KU, Vira S, Elfar JC, Lorio MP. Advancements in Custom 3D-Printed Titanium Interbody Spinal Fusion Cages and Their Relevance in Personalized Spine Care. J Pers Med 2024; 14:809. [PMID: 39202002 PMCID: PMC11355268 DOI: 10.3390/jpm14080809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2024] [Revised: 07/17/2024] [Accepted: 07/24/2024] [Indexed: 09/03/2024] Open
Abstract
3D-printing technology has revolutionized spinal implant manufacturing, particularly in developing personalized and custom-fit titanium interbody fusion cages. These cages are pivotal in supporting inter-vertebral stability, promoting bone growth, and restoring spinal alignment. This article reviews the latest advancements in 3D-printed titanium interbody fusion cages, emphasizing their relevance in modern personalized surgical spine care protocols applied to common clinical scenarios. Furthermore, the authors review the various printing and post-printing processing technologies and discuss how engineering and design are deployed to tailor each type of implant to its patient-specific clinical application, highlighting how anatomical and biomechanical considerations impact their development and manufacturing processes to achieve optimum osteoinductive and osteoconductive properties. The article further examines the benefits of 3D printing, such as customizable geometry and porosity, that enhance osteointegration and mechanical compatibility, offering a leap forward in patient-specific solutions. The comparative analysis provided by the authors underscores the unique challenges and solutions in designing cervical, and lumbar spine implants, including load-bearing requirements and bioactivity with surrounding bony tissue to promote cell attachment. Additionally, the authors discuss the clinical outcomes associated with these implants, including the implications of improvements in surgical precision on patient outcomes. Lastly, they address strategies to overcome implementation challenges in healthcare facilities, which often resist new technology acquisitions due to perceived cost overruns and preconceived notions that hinder potential savings by providing customized surgical implants with the potential for lower complication and revision rates. This comprehensive review aims to provide insights into how modern 3D-printed titanium interbody fusion cages are made, explain quality standards, and how they may impact personalized surgical spine care.
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Affiliation(s)
- Kai-Uwe Lewandrowski
- Center for Advanced Spine Care of Southern Arizona, Division Personalized Pain Research and Education, Tucson, AZ 85712, USA
- Department of Orthopaedics, Fundación Universitaria Sanitas Bogotá, Bogotá 111321, Colombia
| | - Shaleen Vira
- Orthopedic and Sports Medicine Institute, Banner-University Tucson Campus, 755 East McDowell Road, Floor 2, Phoenix, AZ 85006, USA;
| | - John C. Elfar
- Department of Orthopaedic Surgery, University of Arizona College of Medicine, Tucson, AZ 85721, USA
| | - Morgan P. Lorio
- Advanced Orthopedics, 499 East Central Parkway, Altamonte Springs, FL 32701, USA;
- Orlando College of Osteopathic Medicine, Orlando, FL 34787, USA
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Han X, Wu G, Liu X, Song X, Cui L. Research on a Support-Free Five-Degree-of-Freedom Additive Manufacturing Method. MICROMACHINES 2024; 15:855. [PMID: 39064366 PMCID: PMC11279049 DOI: 10.3390/mi15070855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2024] [Revised: 06/24/2024] [Accepted: 06/26/2024] [Indexed: 07/28/2024]
Abstract
When using traditional 3D printing equipment to manufacture overhang models, it is often necessary to generate support structures to assist in the printing of parts. The post-processing operation of removing the support structures after printing is time-consuming and wastes material. In order to solve the above problems, a support-free five-degree-of-freedom additive manufacturing (SFAM) method is proposed. Through the homogeneous coordinate transformation matrix, the forward and inverse kinematics equations of the five-degree-of-freedom additive manufacturing device (FAMD) are established, and the joint variables of each axis are solved to realize the five-axis linkage of the additive manufacturing (AM) device. In this research work, initially, the layered curve is obtained through the structural lines of the overhang model, and a continuous path planning of the infill area is performed on it, and further, the part printing experiments are conducted on the FAMD. Compared with the traditional three-axis additive manufacturing (TTAM) method, the SFAM method shortens the printing time by 23.58% and saves printing materials by 33.06%. The experimental results show that the SFAM method realizes the support-free printing of overhang models, which not only improves the accuracy of the parts but also the manufacturing efficiency of the parts.
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Affiliation(s)
- Xingguo Han
- College of Mechanical and Control Engineering, Guilin University of Technology, Guilin 541006, China;
- Guangxi Key Laboratory of Special Engineering Equipment and Control, Guilin University of Aerospace Technology, Guilin 541004, China; (X.S.); (L.C.)
- Key Laboratory of Special Engineering Equipment Design and Intelligent Driving Technology, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Aerospace Technology, Guilin 541004, China
| | - Gaofei Wu
- College of Mechanical and Control Engineering, Guilin University of Technology, Guilin 541006, China;
| | - Xuan Liu
- School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China;
| | - Xiaohui Song
- Guangxi Key Laboratory of Special Engineering Equipment and Control, Guilin University of Aerospace Technology, Guilin 541004, China; (X.S.); (L.C.)
- Key Laboratory of Special Engineering Equipment Design and Intelligent Driving Technology, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Aerospace Technology, Guilin 541004, China
| | - Lixiu Cui
- Guangxi Key Laboratory of Special Engineering Equipment and Control, Guilin University of Aerospace Technology, Guilin 541004, China; (X.S.); (L.C.)
- Key Laboratory of Special Engineering Equipment Design and Intelligent Driving Technology, Education Department of Guangxi Zhuang Autonomous Region, Guilin University of Aerospace Technology, Guilin 541004, China
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Rodríguez-Pombo L, Carou-Senra P, Rodríguez-Martínez E, Januskaite P, Rial C, Félix P, Alvarez-Lorenzo C, Basit AW, Goyanes A. Customizable orodispersible films: Inkjet printing and data matrix encoding for personalized hydrocortisone dosing. Int J Pharm 2024; 655:124005. [PMID: 38493841 DOI: 10.1016/j.ijpharm.2024.124005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/08/2024] [Accepted: 03/14/2024] [Indexed: 03/19/2024]
Abstract
The aim of this study was to exploit the versatility of inkjet printing to develop flexible doses of drug-loaded orodispersible films that encoded information in a data matrix pattern, and to introduce a specialised data matrix-generator software specifically focused on the healthcare sector. Pharma-inks (drug-loaded inks) containing hydrocortisone (HC) were developed and characterised based on their rheological properties and drug content. Different strategies were investigated to improve HC solubility: formation of β-cyclodextrin complexes, Soluplus® based micelles, and the use of co-solvent systems. The software automatically adapted the data matrix size and identified the number of layers for printing. HC content deposited in each film layer was measured, and it was found that the proportion of co-solvent used directly affected the drug solubility and simultaneously played a role in the modification of the viscosity and surface tension of the inks. The formation of β-cyclodextrin complexes improved the drug quantity deposited in each layer. On the contrary, micelle-based inks were not suitable for printing. Orodispersible films containing flexible and low doses of personalised HC were successfully prepared, and the development of a code generator software oriented to medical use provided an additional, innovative, and revolutionary advantage to personalised medicine safety and accessibility.
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Affiliation(s)
- Lucía Rodríguez-Pombo
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Instituto de Materiales (iMATUS) and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Paola Carou-Senra
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Instituto de Materiales (iMATUS) and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Erea Rodríguez-Martínez
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Instituto de Materiales (iMATUS) and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Patricija Januskaite
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK
| | - Carlos Rial
- FABRX Ltd., Henwood House, Henwood, Ashford, Kent TN24 8DH, UK; FABRX Artificial Intelligence, Carretera de Escairón, 14, Currelos (O Saviñao) CP 27543, Spain
| | - Paulo Félix
- CiTIUS, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Carmen Alvarez-Lorenzo
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Instituto de Materiales (iMATUS) and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Abdul W Basit
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK; FABRX Ltd., Henwood House, Henwood, Ashford, Kent TN24 8DH, UK; FABRX Artificial Intelligence, Carretera de Escairón, 14, Currelos (O Saviñao) CP 27543, Spain.
| | - Alvaro Goyanes
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Instituto de Materiales (iMATUS) and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain; Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK; FABRX Ltd., Henwood House, Henwood, Ashford, Kent TN24 8DH, UK; FABRX Artificial Intelligence, Carretera de Escairón, 14, Currelos (O Saviñao) CP 27543, Spain.
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Lu A, Duggal I, Daihom BA, Zhang Y, Maniruzzaman M. Unraveling the influence of solvent composition on Drop-on-Demand binder jet 3D printed tablets containing calcium sulfate hemihydrate. Int J Pharm 2024; 649:123652. [PMID: 38040397 DOI: 10.1016/j.ijpharm.2023.123652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 11/26/2023] [Accepted: 11/27/2023] [Indexed: 12/03/2023]
Abstract
Recently, binder jet printed modular tablets were loaded with three anti-viral drugs via Drop on Demand (DoD) technology where drug solutions prepared in ethanol showed faster release than those prepared in water. During printing, water is used as a binding agent, whereas ethanol is added to maintain the porous structure of the tablets. Thus, the hypothesis is that the porosity would be controlled by manipulating the percentage of water and ethanol. In this study, Rhodamine 6G (R6G) was selected as a model drug due to its high solubility in water and ethanol, visualization function as a fluorescent dye, and potential therapeutic effects for cancer treatment. Approximately, 10 mg/ml R6G solutions were prepared with five different water-ethanol ratios (0-100, 75-25, 50-50, 75-25, 100-0). The ink solutions were printed onto blank binder jet 3D-printed tablets containing calcium sulphate hemihydrate using DoD technology. The tablets were dried at room temperature and then characterized using SEM-EDX, fluorescent microscope, TGA, XRD, FTIR, and DSC as well as in vitro release studies to investigate the impact of water-ethanol ratio on the release profile of R6G. Results indicated that the solution with higher ethanol ratio penetrated the tablets faster than the lower ethanol ratio, while the solution prepared with pure water was first accumulated onto the tablets' surface and then absorbed by the tablets. Moreover, tablets with more water content gained more weight and thickness. The EDX analysis and fluorescent microscope showed the uniform surface distribution of the drug. The SEM images revealed the difference in the tablet surface among the five formulations. Furthermore, the TGA data presents a notable increase in water loss, with XRD analysis suggesting the formation of gypsum in tablets containing elevated water content. The release study exhibited that the fastest release was from WE0-100, whereas the release rate decreases as the content of water increases. The WE0-100 releases more than 40 % drug within the first hour which is almost twice as high of the WE100-0 formulation. This DoD technology could distribute drugs onto the tablet's surface uniformly. The calcium sulfate would transform from hemihydrate to dihydrate form in the presence of water and therefore, those tablets treated with higher water content led to slower release. In conclusion, this study underscores the substantial impact of the water-ethanol ratio on drug release from binder jet printed tablets and highlights the potential of DoD technology for uniform drug distribution and controlled release.
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Affiliation(s)
- Anqi Lu
- Division of Molecular, Pharmaceutics and Drug Delivery, College of Pharmacy, the University of Texas at Austin, Austin TX, 78712
| | - Ishaan Duggal
- Division of Molecular, Pharmaceutics and Drug Delivery, College of Pharmacy, the University of Texas at Austin, Austin TX, 78712
| | - Baher A Daihom
- Division of Molecular, Pharmaceutics and Drug Delivery, College of Pharmacy, the University of Texas at Austin, Austin TX, 78712; Department of pharmaceutics and industrial pharmacy, Cairo University, Kasr El-Aini St., Cairo 11562, Egypt
| | - Yu Zhang
- Division of Molecular, Pharmaceutics and Drug Delivery, College of Pharmacy, the University of Texas at Austin, Austin TX, 78712; Pharmaceutical Engineering and 3D Printing (PharmE3D) Labs, Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA
| | - Mohammed Maniruzzaman
- Division of Molecular, Pharmaceutics and Drug Delivery, College of Pharmacy, the University of Texas at Austin, Austin TX, 78712; Pharmaceutical Engineering and 3D Printing (PharmE3D) Labs, Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA.
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6
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Lu A, Williams RO, Maniruzzaman M. 3D printing of biologics-what has been accomplished to date? Drug Discov Today 2024; 29:103823. [PMID: 37949427 DOI: 10.1016/j.drudis.2023.103823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/27/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
Three-dimensional (3D) printing is a promising approach for the stabilization and delivery of non-living biologics. This versatile tool builds complex structures and customized resolutions, and has significant potential in various industries, especially pharmaceutics and biopharmaceutics. Biologics have become increasingly prevalent in the field of medicine due to their diverse applications and benefits. Stability is the main attribute that must be achieved during the development of biologic formulations. 3D printing could help to stabilize biologics by entrapment, support binding, or crosslinking. Furthermore, gene fragments could be transited into cells during co-printing, when the pores on the membrane are enlarged. This review provides: (i) an introduction to 3D printing technologies and biologics, covering genetic elements, therapeutic proteins, antibodies, and bacteriophages; (ii) an overview of the applications of 3D printing of biologics, including regenerative medicine, gene therapy, and personalized treatments; (iii) information on how 3D printing could help to stabilize and deliver biologics; and (iv) discussion on regulations, challenges, and future directions, including microneedle vaccines, novel 3D printing technologies and artificial-intelligence-facilitated research and product development. Overall, the 3D printing of biologics holds great promise for enhancing human health by providing extended longevity and enhanced quality of life, making it an exciting area in the rapidly evolving field of biomedicine.
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Affiliation(s)
- Anqi Lu
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA
| | - Robert O Williams
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA
| | - Mohammed Maniruzzaman
- Division of Molecular Pharmaceutics and Drug Delivery, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA; Pharmaceutical Engineering and 3D Printing (PharmE3D) Lab, Department of Pharmaceutics and Drug Delivery, School of Pharmacy, The University of Mississippi, University, MS 38677, USA.
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Li Y, Zhou Z, He Y. Tribocorrosion and Surface Protection Technology of Titanium Alloys: A Review. MATERIALS (BASEL, SWITZERLAND) 2023; 17:65. [PMID: 38203919 PMCID: PMC10779822 DOI: 10.3390/ma17010065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 11/28/2023] [Accepted: 12/13/2023] [Indexed: 01/12/2024]
Abstract
Titanium alloy has the advantages of high specific strength, good corrosion resistance, and biocompatibility and is widely used in marine equipment, biomedicine, aerospace, and other fields. However, the application of titanium alloy in special working conditions shows some shortcomings, such as low hardness and poor wear resistance, which seriously affect the long life and safe and reliable service of the structural parts. Tribocorrosion has been one of the research hotspots in the field of tribology in recent years, and it is one of the essential factors affecting the application of passivated metal in corrosive environments. In this work, the characteristics of the marine and human environments and their critical tribological problems are analyzed, and the research connotation of tribocorrosion of titanium alloy is expounded. The research status of surface protection technology for titanium alloy in marine and biological environments is reviewed, and the development direction and trends in surface engineering of titanium alloy are prospected.
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Affiliation(s)
- Yang Li
- School of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005, China;
| | - Zelong Zhou
- School of Nuclear Equipment and Nuclear Engineering, Yantai University, Yantai 264005, China;
| | - Yongyong He
- State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China
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Molnar F, Rendeki M, Rendeki S, Nagy B, Bacher V, Bogar P, Schlegl A, Koltai A, Maroti P, Marovics G. Validation of 3D printed MAYO tubes and stethoscope in simulated medical environment - Tools fabricated with additive manufacturing for emergency care. Heliyon 2023; 9:e20866. [PMID: 37916113 PMCID: PMC10616327 DOI: 10.1016/j.heliyon.2023.e20866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 09/29/2023] [Accepted: 10/09/2023] [Indexed: 11/03/2023] Open
Abstract
Emergency and disaster medical care often face resource or equipment shortages. 3D printing technology has been proven to be effective in cases with insufficient supply chains. MAYO tubes and stethoscopes are essential components of ABCDE patient examinations; however, 3D-printed variants have not been fully tested. These 3D-printed instruments were substituted and validated in a simulated pre-hospital environment. In total, 26 participants were included in this study. Fifteen clinicians or paramedics with at least 3 years of professional experience and 10 medical students. One student was excluded because he had relevant experience with emergency care. As basic tasks, the placement of MAYO tubes and auscultation with stethoscopes were performed using medical simulators. 3D printed instruments were compared with conventional clinical devices by measuring the time required for the intervention, success rate, and user satisfaction. In the study FFF (Fused Filament Fabrication (FFF), SLS (Selective Laser Sintering (SLS), and SLA (stereolithography) 3D printing were used in this study. The times required for implementation and auscultation were examined for each instrument. There was no significant difference between the MAYO tube (p = 0.798) and the stethoscope (p = 0.676). In the case of stethoscopy, the study investigated the correct diagnosis, and no significant difference was found (p = 0.239), although an interesting trend was observed. Regarding the MAYO tube, the study found no significant difference in correct position formation (p = 0.163). The experience levels of the groups did not influence these factors. However, significant differences in user satisfaction were found in both cases in favour of the conventional versions (p < 0.001). Overall, the results of this study suggest that 3D-printed devices could be suitable replacements for clinic-based devices in emergency situations. The 3D-printed devices did not perform inferiorly at any of the indicated points compared to their classical counterparts. However, the practical applicability of the devices used in this study requires further investigation.
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Affiliation(s)
- Ferenc Molnar
- University of Pecs, Medical School, Medical Skills Education and Innovation Centre ,HU-7624, Pecs, Szigeti str. 12, Hungary
| | - Matyas Rendeki
- University of Pecs, Medical School, Medical Skills Education and Innovation Centre ,HU-7624, Pecs, Szigeti str. 12, Hungary
| | - Szilard Rendeki
- University of Pecs, Medical School, Medical Skills Education and Innovation Centre ,HU-7624, Pecs, Szigeti str. 12, Hungary
- University of Pecs, Clinical Centre, Department of Anesthesiology and Intensive Care HU-7624 ,Pecs, Ifjusag str 13, Hungary
| | - Balint Nagy
- University of Pecs, Medical School, Medical Skills Education and Innovation Centre ,HU-7624, Pecs, Szigeti str. 12, Hungary
- University of Pecs, Clinical Centre, Department of Anesthesiology and Intensive Care HU-7624 ,Pecs, Ifjusag str 13, Hungary
| | - Viktor Bacher
- University of Pecs, Medical School, Medical Skills Education and Innovation Centre ,HU-7624, Pecs, Szigeti str. 12, Hungary
- University of Pecs, Clinical Centre, Department of Anesthesiology and Intensive Care HU-7624 ,Pecs, Ifjusag str 13, Hungary
| | - Peter Bogar
- University of Pecs, Medical School, 3D Printing and Visualization Centre, HU-7624, Boszorkany str. 2, Hungary
| | - Adam Schlegl
- University of Pecs, Clinical Centre, Department of Orthopaedics, HU-7632, Pecs, Akac str. 1, Hungary
| | - Arnold Koltai
- University of Pecs, Medical School, Medical Skills Education and Innovation Centre ,HU-7624, Pecs, Szigeti str. 12, Hungary
| | - Peter Maroti
- University of Pecs, Medical School, Medical Skills Education and Innovation Centre ,HU-7624, Pecs, Szigeti str. 12, Hungary
- University of Pecs, Medical School, 3D Printing and Visualization Centre, HU-7624, Boszorkany str. 2, Hungary
| | - Gergely Marovics
- University of Pecs, Medical School, Department of Public Health Medicine ,HU-7624, Pecs, Szigeti str. 12, Hungary
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Bakhtiari H, Nikzad M, Tolouei-Rad M. Influence of Three-Dimensional Printing Parameters on Compressive Properties and Surface Smoothness of Polylactic Acid Specimens. Polymers (Basel) 2023; 15:3827. [PMID: 37765681 PMCID: PMC10535293 DOI: 10.3390/polym15183827] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 09/14/2023] [Accepted: 09/16/2023] [Indexed: 09/29/2023] Open
Abstract
While the mechanical performance of fused filament fabrication (FFF) parts has been extensively studied in terms of the tensile and bending strength, limited research accounts for their compressive performance. This study investigates the effect of four process parameters (layer height, extrusion width, nozzle temperature, and printing speed) on the compressive properties and surface smoothness of FFF parts made of Polylactic Acid (PLA). The orthogonal Taguchi method was employed for designing the experiments. The surface roughness and compressive properties of the specimens were then measured and optimized using the analysis of variance (ANOVA). A microscopic analysis was also performed to identify the failure mechanism under static compression. The results indicated that the layer height had the most significant influence on all studied properties, followed by the print speed in the case of compressive modulus, hysteresis loss, and residual strain; extrusion width in the case of compressive strength and specific strength; and nozzle temperature in the case of toughness and failure strain. The optimal design for both high compressive properties and surface smoothness were determined as a 0.05 mm layer height, 0.65 mm extrusion width, 205 °C nozzle temperature, and 70 mm/s print speed. The main failure mechanism observed by SEM analysis was delamination between layers, occurring at highly stressed points near the stitch line of the PLA prints.
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Affiliation(s)
- Hamed Bakhtiari
- School of Engineering, Edith Cowan University, Joondalup, WA 6027, Australia
| | - Mostafa Nikzad
- Department of Mechanical and Product Design Engineering, School of Engineering, Swinburne University of Technology, Hawthorn, VIC 3122, Australia;
| | - Majid Tolouei-Rad
- School of Engineering, Edith Cowan University, Joondalup, WA 6027, Australia
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10
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Kirloskar KM, Haffner ZK, Abadeer A, Yosaitis J, Baker SB. The Innovation Press: A Primer on the Anatomy of Digital Design in Plastic Surgery. Ann Plast Surg 2023; 91:307-312. [PMID: 37489974 DOI: 10.1097/sap.0000000000003617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
ABSTRACT Three-dimensional (3D) printing continues to revolutionize the field of plastic surgery, allowing surgeons to adapt to the needs of individual patients and innovate, plan, or refine operative techniques. The utility of this manufacturing modality spans from surgical planning, medical education, and effective patient communication to tissue engineering and device prototyping and has valuable implications in every facet of plastic surgery. Three-dimensional printing is more accessible than ever to the surgical community, regardless of previous background in engineering or biotechnology. As such, the onus falls on the surgeon-innovator to have a functional understanding of the fundamental pipeline and processes in actualizing such innovation. We review the broad range of reported uses for 3D printing in plastic surgery, the process from conceptualization to production, and the considerations a physician must make when using 3D printing for clinical applications. We additionally discuss the role of computer-assisted design and manufacturing and virtual and augmented reality, as well as the ability to digitally modify devices using this software. Finally, a discussion of 3D printing logistics, printer types, and materials is included. With innovation and problem solving comprising key tenets of plastic surgery, 3D printing can be a vital tool in the surgeon's intellectual and digital arsenal to span the gap between concept and reality.
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Affiliation(s)
| | | | - Andrew Abadeer
- Department of Plastic and Reconstructive Surgery, MedStar Georgetown University Hospital
| | | | - Stephen B Baker
- Department of Plastic and Reconstructive Surgery, MedStar Georgetown University Hospital
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11
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Daly M, Tarfaoui M, Chihi M, Bouraoui C. FDM technology and the effect of printing parameters on the tensile strength of ABS parts. THE INTERNATIONAL JOURNAL, ADVANCED MANUFACTURING TECHNOLOGY 2023; 126:5307-5323. [PMID: 37252263 PMCID: PMC10150688 DOI: 10.1007/s00170-023-11486-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 04/24/2023] [Indexed: 05/31/2023]
Abstract
The effect of printing speed on the tensile strength of acrylonitrile butadiene styrene (ABS) samples fabricated using the fused deposition modelling (FDM) process is addressed in this research. The mechanical performance of FDM-ABS products was evaluated using four different printing speeds (10, 30, 50, and 70 mm/s). A numerical model was developed to simulate the experimental campaign by coupling two computational codes, Abaqus and Digimat. In addition, this article attempts to investigate the impacts of printing parameters on ASTM D638 ABS specimens. A 3D thermomechanical model was implemented to simulate the printing process and evaluate the printed part quality by analysing residual stress, temperature gradient and warpage. Several parts printed in Digimat were analysed and compared numerically. The parametric study allowed us to quantify the effect of 3D printing parameters such as printing speed, printing direction, and the chosen discretisation (layer by layer or filament) on residual stresses, deflection, warpage, and resulting mechanical behaviour.
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Affiliation(s)
- Mohamed Daly
- ENSTA Bretagne, IRDL UMR CNRS 6027, F-29200 Brest, France
- University of Sousse, LMS ENISo, 4023 Sousse, Tunisia
| | - Mostapha Tarfaoui
- ENSTA Bretagne, IRDL UMR CNRS 6027, F-29200 Brest, France
- Green Energy Park (IRESEN/UM6P) km2 R206, Benguerir, Morocco
- Campus de Rouyn-Noranda, 445, Université du Québec en Abitibi-Témiscamingue, Rouyn-Noranda, QC, J9X 5E4 Canada
| | - Manel Chihi
- University of Sousse, LMS ENISo, 4023 Sousse, Tunisia
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12
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Mousavi A, Provaggi E, Kalaskar DM, Savoji H. 3D printing families: laser, powder, and nozzle-based techniques. 3D Print Med 2023. [DOI: 10.1016/b978-0-323-89831-7.00009-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
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13
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Rodríguez-Pombo L, Awad A, Basit AW, Alvarez-Lorenzo C, Goyanes A. Innovations in Chewable Formulations: The Novelty and Applications of 3D Printing in Drug Product Design. Pharmaceutics 2022; 14:1732. [PMID: 36015355 PMCID: PMC9412656 DOI: 10.3390/pharmaceutics14081732] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/09/2022] [Accepted: 08/09/2022] [Indexed: 11/16/2022] Open
Abstract
Since their introduction, chewable dosage forms have gained traction due to their ability to facilitate swallowing, especially in paediatric, geriatric and dysphagia patients. Their benefits stretch beyond human use to also include veterinary applications, improving administration and palatability in different animal species. Despite their advantages, current chewable formulations do not account for individualised dosing and palatability preferences. In light of this, three-dimensional (3D) printing, and in particular the semi-solid extrusion technology, has been suggested as a novel manufacturing method for producing customised chewable dosage forms. This advanced approach offers flexibility for selecting patient-specific doses, excipients, and organoleptic properties, which are critical for ensuring efficacy, safety and adherence to the treatment. This review provides an overview of the latest advancements in chewable dosage forms for human and veterinary use, highlighting the motivations behind their use and covering formulation considerations, as well as regulatory aspects.
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Affiliation(s)
- Lucía Rodríguez-Pombo
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Materials Institute iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Atheer Awad
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK
| | - Abdul W. Basit
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK
- FabRx Ltd., Henwood House, Henwood, Ashford, Kent TN24 8DH, UK
| | - Carmen Alvarez-Lorenzo
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Materials Institute iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Alvaro Goyanes
- Departamento de Farmacología, Farmacia y Tecnología Farmacéutica, I+D Farma (GI-1645), Facultad de Farmacia, Materials Institute iMATUS and Health Research Institute of Santiago de Compostela (IDIS), Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
- Department of Pharmaceutics, UCL School of Pharmacy, University College London, 29-39 Brunswick Square, London WC1N 1AX, UK
- FabRx Ltd., Henwood House, Henwood, Ashford, Kent TN24 8DH, UK
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14
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Weaver E, O'Hagan C, Lamprou DA. The sustainability of emerging technologies for use in pharmaceutical manufacturing. Expert Opin Drug Deliv 2022; 19:861-872. [PMID: 35732275 DOI: 10.1080/17425247.2022.2093857] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
INTRODUCTION Sustainability within the pharmaceutical industry is becoming a focal point for many companies, to improve the longevity and social perception of the industry. Both additive manufacturing (AM) and microfluidics (MFs) are continuously progressing, so are far from their optimization in terms of sustainability; hence, it is the aim of this review to highlight potential gaps alongside their beneficial features. Discussed throughout this review also will be an in-depth discussion on the environmental, legal, economic, and social particulars relating to these emerging technologies. AREAS COVERED Additive manufacturing (AM) and microfluidics (MFs) are discussed in depth within this review, drawing from up-to-date literature relating to sustainability and circular economies. This applies to both technologies being utilized for therapeutic and analytical purposes within the pharmaceutical industry. EXPERT OPINION It is the role of emerging technologies to be at the forefront of promoting a sustainable message by delivering plausible environmental standards whilst maintaining efficacy and economic viability. AM processes are highly customizable, allowing for their optimization in terms of sustainability, from reducing printing time to reducing material usage by removing supports. MFs too are supporting sustainability via reduced material wastage and providing a sustainable means for point of care analysis.
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Affiliation(s)
- Edward Weaver
- School of Pharmacy, Queen's University Belfast, Belfast, UK
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15
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Jin Z, He C, Fu J, Han Q, He Y. Balancing the customization and standardization: exploration and layout surrounding the regulation of the growing field of 3D-printed medical devices in China. Biodes Manuf 2022; 5:580-606. [PMID: 35194519 PMCID: PMC8853031 DOI: 10.1007/s42242-022-00187-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2021] [Accepted: 01/17/2022] [Indexed: 12/23/2022]
Abstract
Medical devices are instruments and other tools that act on the human body to aid clinical diagnosis and disease treatment, playing an indispensable role in modern medicine. Nowadays, the increasing demand for personalized medical devices poses a significant challenge to traditional manufacturing methods. The emerging manufacturing technology of three-dimensional (3D) printing as an alternative has shown exciting applications in the medical field and is an ideal method for manufacturing such personalized medical devices with complex structures. However, the application of this new technology has also brought new risks to medical devices, making 3D-printed devices face severe challenges due to insufficient regulation and the lack of standards to provide guidance to the industry. This review aims to summarize the current regulatory landscape and existing research on the standardization of 3D-printed medical devices in China, and provide ideas to address these challenges. We focus on the aspects concerned by the regulatory authorities in 3D-printed medical devices, highlighting the quality system of such devices, and discuss the guidelines that manufacturers should follow, as well as the current limitations and the feasible path of regulation and standardization work based on this perspective. The key points of the whole process quality control, performance evaluation methods and the concept of whole life cycle management of 3D-printed medical devices are emphasized. Furthermore, the significance of regulation and standardization is pointed out. Finally, aspects worthy of attention and future perspectives in this field are discussed.
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Affiliation(s)
- Zhongboyu Jin
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027 China
- Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Chaofan He
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027 China
- Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Jianzhong Fu
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027 China
- Key Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027 China
| | - Qianqian Han
- National Institutes for Food and Drug Control, Beijing, 102629 China
| | - Yong He
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou, 310027 China
- Key Laboratory of Materials Processing and Mold, Zhengzhou University, Zhengzhou, 450002 China
- Cancer Center, Zhejiang University, Hangzhou, 310058 China
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16
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Shen YW, Tsai YS, Hsu JT, Shie MY, Huang HL, Fuh LJ. Biomechanical Analyses of Porous Designs of 3D-Printed Titanium Implant for Mandibular Segmental Osteotomy Defects. MATERIALS (BASEL, SWITZERLAND) 2022; 15:576. [PMID: 35057294 PMCID: PMC8779878 DOI: 10.3390/ma15020576] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 01/04/2022] [Accepted: 01/11/2022] [Indexed: 01/15/2023]
Abstract
Clinically, a reconstruction plate can be used for the facial repair of patients with mandibular segmental defects, but it cannot restore their chewing function. The main purpose of this research is to design a new three-dimensionally (3D) printed porous titanium mandibular implant with both facial restoration and oral chewing function reconstruction. Its biomechanical properties were examined using both finite element analysis (FEA) and in vitro experiments. Cone beam computed tomography images of the mandible of a patient with oral cancer were selected as a reference to create 3D computational models of the bone and of the 3D-printed porous implant. The pores of the porous implant were circles or hexagons of 1 or 2 mm in size. A nonporous implant was fabricated as a control model. For the FEA, two chewing modes, namely right unilateral molar clench and right group function, were set as loading conditions. Regarding the boundary condition, the displacement of both condyles was fixed in all directions. For the in vitro experiments, an occlusal force (100 N) was applied to the abutment of the 3D-printed mandibular implants with and without porous designs as the loading condition. The porous mandibular implants withstood higher stress and strain than the nonporous mandibular implant, but all stress values were lower than the yield strength of Ti-6Al-4V (800 MPa). The strain value of the bone surrounding the mandibular implant was affected not only by the shape and size of the pores but also by the chewing mode. According to Frost's mechanostat theory of bone, higher bone strain under the porous implants might help maintain or improve bone quality and bone strength. The findings of this study serve as a biomechanical reference for the design of 3D-printed titanium mandibular implants and require confirmation through clinical investigations.
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Affiliation(s)
- Yen-Wen Shen
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (Y.-S.T.); (J.-T.H.); (M.-Y.S.)
| | - Yuen-Shan Tsai
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (Y.-S.T.); (J.-T.H.); (M.-Y.S.)
| | - Jui-Ting Hsu
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (Y.-S.T.); (J.-T.H.); (M.-Y.S.)
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 413, Taiwan
| | - Ming-You Shie
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (Y.-S.T.); (J.-T.H.); (M.-Y.S.)
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 413, Taiwan
- x-Dimension Center for Medical Research and Translation, China Medical University Hospital, Taichung 404, Taiwan
| | - Heng-Li Huang
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (Y.-S.T.); (J.-T.H.); (M.-Y.S.)
- Department of Bioinformatics and Medical Engineering, Asia University, Taichung 413, Taiwan
| | - Lih-Jyh Fuh
- School of Dentistry, China Medical University, Taichung 404, Taiwan; (Y.-W.S.); (Y.-S.T.); (J.-T.H.); (M.-Y.S.)
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17
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Fakhoury Y, Ellabban A, Attia U, Sallam A, Elsherbiny S. Three-dimensional printing in ophthalmology and eye care: current applications and future developments. Ther Adv Ophthalmol 2022; 14:25158414221106682. [PMID: 35782482 PMCID: PMC9247992 DOI: 10.1177/25158414221106682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 05/24/2022] [Indexed: 11/16/2022] Open
Abstract
Three-dimensional (3D) printing uses a process of adding material in a layer-by-layer fashion to form the end product. This technology is advancing rapidly and is being increasingly utilized in the medical field as it becomes more accessible and cost-effective. It has an increasingly important role in ophthalmology and eyecare as its current and potential applications are extensive and slowly evolving. Three-dimensional printing represents an important method of manufacturing customized products such as orbital implants, ocular prostheses, ophthalmic models, surgical instruments, spectacles and other gadgets. Surgical planning, simulation, training and teaching have all benefitted from this technology. Advances in bioprinting seem to be the future direction of 3D printing with possibilities of printing out viable ocular tissues such as corneas and retinas in the future. It is expected that more ophthalmologists and other clinicians will use this technology in the near future.
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Affiliation(s)
- Yazan Fakhoury
- Medical Doctor, St James’s University Hospital,
Beckett St, Harehills, Leeds, LS9 7TF, UK
| | - Abdallah Ellabban
- Hull University Teaching Hospitals NHS Trust,
Kingston upon Hull, UK
- Suez Canal University, Ismailia, Egypt
| | - Usama Attia
- Manufacturing Technology Centre (MTC),
Coventry, UK
| | - Ahmed Sallam
- Jones Eye Institute, University of Arkansas for
Medical Sciences, Little Rock, AR, USA
| | - Samer Elsherbiny
- Machen Eye Unit, Warwick Hospital, South
Warwickshire NHS Foundation Trust, Warwick, UK
- Warwick Medical School, University of Warwick,
Coventry, UK
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18
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Lamberti AG, Ujfalusi Z, Told R, Hanna D, Józsa G, Maróti P. Development of a Novel X-ray Compatible 3D-Printed Bone Model to Characterize Different K-Wire Fixation Methods in Support of the Treatment of Pediatric Radius Fractures. Polymers (Basel) 2021; 13:4179. [PMID: 34883682 PMCID: PMC8659769 DOI: 10.3390/polym13234179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 11/26/2021] [Accepted: 11/26/2021] [Indexed: 11/16/2022] Open
Abstract
Additive manufacturing technologies are essential in biomedical modeling and prototyping. Polymer-based bone models are widely used in simulating surgical interventions and procedures. Distal forearm fractures are the most common pediatric fractures, in which the Kirschner wire fixation is the most widely used operative method. However, there is still lingering controversy throughout the published literature regarding the number of wires and sites of insertion. This study aims to critically compare the biomechanical stability of different K-wire fixation techniques. Different osteosyntheses were reconstructed on 189 novel standardized bone models, which were created using 3D printing and molding techniques, using PLA and polyurethane materials, and it has been characterized in terms of mechanical behavior and structure. X-ray imaging has also been performed. The validation of the model was successful: the relative standard deviations (RSD = 100 × SD × mean-1, where RSD is relative standard deviation, SD is the standard deviation) of the mechanical parameters varied between 1.1% (10° torsion; 6.52 Nm ± 0.07 Nm) and 5.3% (5° torsion; 4.33 Nm ± 0.23 Nm). The simulated fractures were fixed using two K-wires inserted from radial and dorsal directions (crossed wire fixation) or both from the radial direction, in parallel (parallel wire fixation). Single-wire fixations with shifted exit points were also included. Additionally, three-point bending tests with dorsal and radial load and torsion tests were performed. We measured the maximum force required for a 5 mm displacement of the probe under dorsal and radial loads (means for crossed wire fixation: 249.5 N and 355.9 N; parallel wire fixation: 246.4 N and 308.3 N; single wire fixation: 115.9 N and 166.5 N). We also measured the torque required for 5° and 10° torsion (which varied between 0.15 Nm for 5° and 0.36 Nm for 10° torsion). The crossed wire fixation provided the most stability during the three-point bending tests. Against torsion, both the crossed and parallel wire fixation were superior to the single-wire fixations. The 3D printed model is found to be a reliable, cost-effective tool that can be used to characterize the different fixation methods, and it can be used in further pre-clinical investigations.
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Affiliation(s)
- Anna Gabriella Lamberti
- Medical Centre, Department of Paediatrics, Division of Paediatric Surgery, Traumatology, Urology, and Paediatric Otolaryngology, UP Clinical Centre, 7 Jozsef Attila Str., HU-7623 Pecs, Hungary;
- Department of Thermophysiology, Institute for Translational Medicine, Medical School, University of Pecs, 12 Szigeti Str., HU-7624 Pecs, Hungary
| | - Zoltan Ujfalusi
- Department of Biophysics, Medical School, University of Pecs, 12 Szigeti Str., HU-7624 Pecs, Hungary;
| | - Roland Told
- 3D Printing and Visualization Center, University of Pecs, 2 Boszorkany Str., HU-7624 Pecs, Hungary; (R.T.); (P.M.)
| | - Dániel Hanna
- Department of Biochemistry and Medical Chemistry, Medical School, University of Pecs, 12 Szigeti Str., HU-7624 Pecs, Hungary;
- Research Group of Regenerative Science, Sport and Medicine, Szentagothai Research Centre, University of Pecs, 20 Ifjusag Str., HU-7624 Pecs, Hungary
| | - Gergő Józsa
- Medical Centre, Department of Paediatrics, Division of Paediatric Surgery, Traumatology, Urology, and Paediatric Otolaryngology, UP Clinical Centre, 7 Jozsef Attila Str., HU-7623 Pecs, Hungary;
| | - Péter Maróti
- 3D Printing and Visualization Center, University of Pecs, 2 Boszorkany Str., HU-7624 Pecs, Hungary; (R.T.); (P.M.)
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Jin Z, Li Y, Yu K, Liu L, Fu J, Yao X, Zhang A, He Y. 3D Printing of Physical Organ Models: Recent Developments and Challenges. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2021; 8:e2101394. [PMID: 34240580 PMCID: PMC8425903 DOI: 10.1002/advs.202101394] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/14/2021] [Indexed: 05/05/2023]
Abstract
Physical organ models are the objects that replicate the patient-specific anatomy and have played important roles in modern medical diagnosis and disease treatment. 3D printing, as a powerful multi-function manufacturing technology, breaks the limitations of traditional methods and provides a great potential for manufacturing organ models. However, the clinical application of organ model is still in small scale, facing the challenges including high cost, poor mimicking performance and insufficient accuracy. In this review, the mainstream 3D printing technologies are introduced, and the existing manufacturing methods are divided into "directly printing" and "indirectly printing", with an emphasis on choosing suitable techniques and materials. This review also summarizes the ideas to address these challenges and focuses on three points: 1) what are the characteristics and requirements of organ models in different application scenarios, 2) how to choose the suitable 3D printing methods and materials according to different application categories, and 3) how to reduce the cost of organ models and make the process simple and convenient. Moreover, the state-of-the-art in organ models are summarized and the contribution of 3D printed organ models to various surgical procedures is highlighted. Finally, current limitations, evaluation criteria and future perspectives for this emerging area are discussed.
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Affiliation(s)
- Zhongboyu Jin
- State Key Laboratory of Fluid Power and Mechatronic SystemsSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
- Key Laboratory of 3D Printing Process and Equipment of Zhejiang ProvinceSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
| | - Yuanrong Li
- State Key Laboratory of Fluid Power and Mechatronic SystemsSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
- Key Laboratory of 3D Printing Process and Equipment of Zhejiang ProvinceSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
| | - Kang Yu
- State Key Laboratory of Fluid Power and Mechatronic SystemsSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
- Key Laboratory of 3D Printing Process and Equipment of Zhejiang ProvinceSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
| | - Linxiang Liu
- Zhejiang University HospitalZhejiang UniversityHangzhouZhejiang310027China
| | - Jianzhong Fu
- State Key Laboratory of Fluid Power and Mechatronic SystemsSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
- Key Laboratory of 3D Printing Process and Equipment of Zhejiang ProvinceSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
| | - Xinhua Yao
- State Key Laboratory of Fluid Power and Mechatronic SystemsSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
| | - Aiguo Zhang
- Department of OrthopedicsWuxi Children's Hospital affiliated to Nanjing Medical UniversityWuxiJiangsu214023China
| | - Yong He
- State Key Laboratory of Fluid Power and Mechatronic SystemsSchool of Mechanical EngineeringZhejiang UniversityHangzhouZhejiang310027China
- Key Laboratory of Materials Processing and MoldZhengzhou UniversityZhengzhou450002China
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20
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Told R, Marada G, Rendeki S, Pentek A, Nagy B, Molnar FJ, Maroti P. Manufacturing a First Upper Molar Dental Forceps Using Continuous Fiber Reinforcement (CFR) Additive Manufacturing Technology with Carbon-Reinforced Polyamide. Polymers (Basel) 2021; 13:2647. [PMID: 34451187 PMCID: PMC8399141 DOI: 10.3390/polym13162647] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 08/01/2021] [Accepted: 08/04/2021] [Indexed: 12/23/2022] Open
Abstract
3D printing is an emerging and disruptive technology, supporting the field of medicine over the past decades. In the recent years, the use of additive manufacturing (AM) has had a strong impact on everyday dental applications. Despite remarkable previous results from interdisciplinary research teams, there is no evidence or recommendation about the proper fabrication of handheld medical devices using desktop 3D printers. The aim of this study was to critically examine and compare the mechanical behavior of materials printed with FFF (fused filament fabrication) and CFR (continuous fiber reinforcement) additive manufacturing technologies, and to create and evaluate a massive and practically usable right upper molar forceps. Flexural and torsion fatigue tests, as well as Shore D measurements, were performed. The tensile strength was also measured in the case of the composite material. The flexural tests revealed the measured force values to have a linear correlation with the bending between the 10 mm (17.06 N at 5000th cycle) and 30 mm (37.99 N at 5000th cycle) deflection range. The findings were supported by scanning electron microscopy (SEM) images. Based on the results of the mechanical and structural tests, a dental forceps was designed, 3D printed using CFR technology, and validated by five dentists using a Likert scale. In addition, the vertical force of extraction was measured using a unique molar tooth model, where the reference test was carried out using a standard metal right upper molar forceps. Surprisingly, the tests revealed there to be no significant differences between the standard (84.80 N ± 16.96 N) and 3D-printed devices (70.30 N ± 4.41 N) in terms of extraction force in the tested range. The results also highlighted that desktop CFR technology is potentially suitable for the production of handheld medical devices that have to withstand high forces and perform load-bearing functions.
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Affiliation(s)
- Roland Told
- 3D Printing and Visualization Centre, University of Pecs, Boszorkány Street 2, 7624 Pécs, Hungary; (R.T.); (A.P.)
| | - Gyula Marada
- Clinical Centre, Department of Dentistry, Oral and Maxillofacial Surgery, University of Pecs, Dischka Győző Street 5, 7621 Pécs, Hungary;
| | - Szilard Rendeki
- Medical Simulation Education Centre, Medical School, University of Pecs, Szigeti Road 12, 7624 Pécs, Hungary; (S.R.); (F.J.M.)
- Clinical Centre, Department of Anesthesiology and Intensive Therapy, University of Pecs, Ifjúság Roud 13, 7624 Pécs, Hungary;
| | - Attila Pentek
- 3D Printing and Visualization Centre, University of Pecs, Boszorkány Street 2, 7624 Pécs, Hungary; (R.T.); (A.P.)
| | - Balint Nagy
- Clinical Centre, Department of Anesthesiology and Intensive Therapy, University of Pecs, Ifjúság Roud 13, 7624 Pécs, Hungary;
| | - Ferenc Jozsef Molnar
- Medical Simulation Education Centre, Medical School, University of Pecs, Szigeti Road 12, 7624 Pécs, Hungary; (S.R.); (F.J.M.)
| | - Peter Maroti
- 3D Printing and Visualization Centre, University of Pecs, Boszorkány Street 2, 7624 Pécs, Hungary; (R.T.); (A.P.)
- Clinical Centre, Department of Dentistry, Oral and Maxillofacial Surgery, University of Pecs, Dischka Győző Street 5, 7621 Pécs, Hungary;
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21
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State-of-the-art of 3D printing technology of alginate-based hydrogels-An emerging technique for industrial applications. Adv Colloid Interface Sci 2021; 293:102436. [PMID: 34023568 DOI: 10.1016/j.cis.2021.102436] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 04/29/2021] [Accepted: 05/07/2021] [Indexed: 12/19/2022]
Abstract
Recently, three-dimensional (3D) printing (also known as additive manufacturing) has received unprecedented consideration in various fields owing to many advantages compared to conventional manufacturing equipment such as reduced fabrication time, one-step production, and the ability for rapid prototyping. This promising technology, as the next manufacturing revolution and universal industrial method, allows the user to fabricate desired 3D objects using a layer-by-layer deposition of material and a 3D printer. Alginate, a versatile polysaccharide derived from seaweed, is popularly used for this advanced bio-fabrication technique due to its printability, biodegradability, biocompatibility, excellent availability, low degree of toxicity, being a relatively inexpensive, rapid gelation in the presence of Ca2+ divalent, and having fascinating chemical structure. In recent years, 3D printed alginate-based hydrogels have been prepared and used in various fields including tissue engineering, water treatment, food, electronics, and so forth. Due to the prominent role of 3D printed alginate-based materials in diverse fields. So, this review will focus and highlight the latest and most up-to-date achievements in the field of 3D printed alginate-based materials in biomedical, food, water treatment, and electronics.
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22
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Hossain N, Chowdhury MA, Shuvho MBA, Kashem MA, Kchaou M. 3D-Printed Objects for Multipurpose Applications. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 2021; 30:4756-4767. [PMID: 33814874 PMCID: PMC7996717 DOI: 10.1007/s11665-021-05664-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 02/24/2021] [Accepted: 03/04/2021] [Indexed: 06/07/2023]
Abstract
3D printing is a popular nonconventional manufacturing technique used to print 3D objects by using conventional and nonconventional materials. The application and uses of 3D printing are rapidly increasing in each dimension of the engineering and medical sectors. This article overviews the multipurpose applications of 3D printing based on current research. In the beginning, various popular methods including fused deposition method, stereolithography 3D printing method, powder bed fusion method, digital light processing method, and metal transfer dynamic method used in 3D printing are discussed. Popular materials utilized randomly in printing techniques such as hydrogel, ABS, steel, silver, and epoxy are overviewed. Engineering applications under the current development of the printing technique which include electrode, 4D printing technique, twisting object, photosensitive polymer, and engines are focused. Printing of medical equipment including artificial tissues, scaffolds, bioprinted model, prostheses, surgical instruments, COVID-19, skull, and heart is of major focus. Characterization techniques of the printed 3D products are mentioned. In addition, potential challenges and future prospects are evaluated based on the current scenario. This review article will work as a masterpiece for the researchers interested to work in this field.
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Affiliation(s)
- Nayem Hossain
- Department of Mechanical Engineering, International University of Business Agriculture and Technology (IUBAT), Dhaka, 1230 Bangladesh
- Department of Mechanical Engineering, Dhaka University of Engineering & Technology (DUET), DUET, Gazipur, 1707 Bangladesh
| | - Mohammad Asaduzzaman Chowdhury
- Department of Mechanical Engineering, Dhaka University of Engineering & Technology (DUET), DUET, Gazipur, 1707 Bangladesh
| | - Md. Bengir Ahmed Shuvho
- Department of Industrial and Production Engineering, National Institute of Textile Engineering and Research (NITER), Savar, Dhaka, 1350 Bangladesh
| | - Mohammod Abul Kashem
- Department of Computer Science and Engineering, Dhaka University of Engineering & Technology (DUET), DUET, Gazipur, 1707 Bangladesh
| | - Mohamed Kchaou
- Department of Mechanical Engineering, College of Engineering, University of Bisha, Bisha, 67714 Kingdom of Saudi Arabia
- Laboratory of Electromechanical Systems (LASEM), National Engineering School of Sfax, University of Sfax, 3038 Sfax, Tunisia
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23
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Editorial overview: Recent developments in additive manufacturing. Curr Opin Chem Eng 2020. [DOI: 10.1016/j.coche.2020.100658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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