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Zahia S, Garcia-Zapirain B, Anakabe J, Ander J, Jossa Bastidas O, Loizate Totoricagüena A. A Comparative Study between Scanning Devices for 3D Printing of Personalized Ostomy Patches. SENSORS (BASEL, SWITZERLAND) 2022; 22:560. [PMID: 35062521 PMCID: PMC8780182 DOI: 10.3390/s22020560] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 01/06/2022] [Accepted: 01/07/2022] [Indexed: 06/14/2023]
Abstract
This papers presents a comparative study of three different 3D scanning modalities to acquire 3D meshes of stoma barrier rings from ostomized patients. Computerized Tomography and Structured light scanning methods were the digitization technologies studied in this research. Among the Structured Light systems, the Go!Scan 20 and the Structure Sensor were chosen as the handheld 3D scanners. Nineteen ostomized patients took part in this study, starting from the 3D scans acquisition until the printed ostomy patches validation. 3D mesh processing, mesh generation and 3D mesh comparison was carried out using commercial softwares. The results of the presented study show that the Structure Sensor, which is the low cost structured light 3D sensor, has a great potential for such applications. This study also discusses the benefits and reliability of low-cost structured light systems.
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Affiliation(s)
- Sofia Zahia
- eVIDA Research Group, University of Deusto, 48007 Bilbao, Spain; (B.G.-Z.); (O.J.B.)
| | | | - Jon Anakabe
- LEARTIKER S.COOP, 48270 Markina, Spain; (J.A.); (J.A.)
| | - Joan Ander
- LEARTIKER S.COOP, 48270 Markina, Spain; (J.A.); (J.A.)
| | - Oscar Jossa Bastidas
- eVIDA Research Group, University of Deusto, 48007 Bilbao, Spain; (B.G.-Z.); (O.J.B.)
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202
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Petousis M, Vidakis N, Velidakis E, Kechagias JD, David CN, Papadakis S, Mountakis N. Affordable Biocidal Ultraviolet Cured Cuprous Oxide Filled Vat Photopolymerization Resin Nanocomposites with Enhanced Mechanical Properties. Biomimetics (Basel) 2022; 7:12. [PMID: 35076448 PMCID: PMC8788546 DOI: 10.3390/biomimetics7010012] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/03/2022] [Accepted: 01/07/2022] [Indexed: 11/16/2022] Open
Abstract
In this study, Cuprous Oxide (Cu2O), known for its mechanism against bacteria, was used as filler to induce biocidal properties on a common commercial resin stereolithography (SLA) 3D printing resin. The aim was to develop nanocomposites suitable for the SLA process with a low-cost process that mimic host defense peptides (HDPs). Such materials have a huge economic and societal influence on the global technological war on illness and exploiting 3D printing characteristics is an additional asset for these materials. Their mechanical performance was also investigated with tensile, flexural, Charpy's impact, and Vickers microhardness tests. Morphological analysis was performed through scanning electron microscopy (SEM), atomic force microscopy (AFM), and energy-dispersive X-ray spectroscopy (EDS) analysis, while the thermal behavior was studied through Thermogravimetric Analysis (TGA). The antibacterial activity of the fabricated nanocomposites was investigated using a screening agar well diffusion method, for a gram-negative and a gram-positive bacterium. Three-dimensional printed nanocomposites exhibited antibacterial performance in all loadings studied, while their mechanical enhancement was approximately 20% even at low filler loadings, revealing a multi-functional performance and a potential of Cuprous Oxide implementation in SLA resin matrices for engineering and medical applications.
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Affiliation(s)
- Markos Petousis
- Mechanical Engineering Department, Hellenic Mediterranean University, Estavromenos, 71410 Heraklion, Greece; (N.V.); (E.V.); (N.M.)
| | - Nectarios Vidakis
- Mechanical Engineering Department, Hellenic Mediterranean University, Estavromenos, 71410 Heraklion, Greece; (N.V.); (E.V.); (N.M.)
| | - Emmanuel Velidakis
- Mechanical Engineering Department, Hellenic Mediterranean University, Estavromenos, 71410 Heraklion, Greece; (N.V.); (E.V.); (N.M.)
| | | | - Constantine N. David
- Manufacturing Technology & Production Systems Laboratory, School of Engineering, International Hellenic University, Serres Campus, 62124 Serres, Greece;
| | - Stefanos Papadakis
- Biology Department, University of Crete, Voutes University Campus, P.O. Box 2208, 70013 Heraklion, Greece;
| | - Nikolaos Mountakis
- Mechanical Engineering Department, Hellenic Mediterranean University, Estavromenos, 71410 Heraklion, Greece; (N.V.); (E.V.); (N.M.)
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203
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Li K, Liu Z, Li X, Wang J. 3D printing-assisted surgery for proximal humerus fractures: a systematic review and meta-analysis. Eur J Trauma Emerg Surg 2022; 48:3493-3503. [PMID: 34997257 DOI: 10.1007/s00068-021-01851-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 11/29/2021] [Indexed: 11/03/2022]
Abstract
AIM This study aimed to assess the efficacy of three-dimensional (3D) printing to conventional surgeries in proximal humerus fractures (PHFs). METHODS Eight databases were comprehensively searched for data on clinical characteristics and outcomes, including operation time, time to bone healing, blood loss volume, number of intraoperative fluoroscopies, the reduction rate of anatomic proximal humeri, Constant scores, Neer rating, loss of humeral head height, and complications. These data were compared between 3D printing-assisted versus conventional surgeries to learn the efficacy of 3D printing-assisted surgery. RESULTS 3D printing-assisted surgery outperformed conventional procedures in operation time, blood loss volume, time to the union of PHFs, number of fluoroscopies, the reduction rate of anatomic proximal humeri, Constant scores, Neer rating, and complications. CONCLUSION 3D printing-assisted surgery improves operation time, anatomic healing, pain, and motion, with less harm to patients.
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Affiliation(s)
- Kai Li
- Clinical Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Zhendong Liu
- Clinical Medical College, Yangzhou University, Yangzhou, 225001, China
| | - Xiaolei Li
- Department of Orthopaedics, Clinical Medical College of Yangzhou University, Northern Jiangsu People's Hospital, 98 Nantong West Road, Yangzhou, 225001, Jiangsu, China.
| | - Jingcheng Wang
- Northern Jiangsu People's Hospital, Yangzhou, 225001, Jiangsu, China.
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204
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Grygier D, Kujawa M, Kowalewski P. Deposition of Biocompatible Polymers by 3D Printing (FDM) on Titanium Alloy. Polymers (Basel) 2022; 14:polym14020235. [PMID: 35054641 PMCID: PMC8780568 DOI: 10.3390/polym14020235] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/30/2021] [Accepted: 01/05/2022] [Indexed: 01/27/2023] Open
Abstract
Nowadays, the replacement of a hip joint is a standard surgical procedure. However, researchers have continuingly been trying to upgrade endoprostheses and make them more similar to natural joints. The use of 3D printing could be helpful in such cases, since 3D-printed elements could mimic the natural lubrication mechanism of the meniscus. In this paper, we propose a method to deposit plastics directly on titanium alloy using 3D printing (FDM). This procedure allows one to obtain endoprostheses that are more similar to natural joints, easier to manufacture and have fewer components. During the research, biocompatible polymers suitable for 3D FDM printing were used, namely polylactide (PLA) and polyamide (PA). The research included tensile and shear tests of metal–polymer bonds, friction coefficient measurements and microscopic observations. The friction coefficient measurements revealed that only PA was promising for endoprostheses (the friction coefficient for PLA was too high). The strength tests and microscopic observations showed that PLA and PA deposition by 3D FDM printing directly on Ti6Al4V titanium alloy is possible; however, the achieved bonding strength and repeatability of the process were unsatisfactory. Nevertheless, the benefits arising from application of this method mean that it is worthwhile to continue working on this issue.
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205
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Kaufmann R, Zech CJ, Takes M, Brantner P, Thieringer F, Deutschmann M, Hergan K, Scharinger B, Hecht S, Rezar R, Wernly B, Meissnitzer M. Vascular 3D Printing with a Novel Biological Tissue Mimicking Resin for Patient-Specific Procedure Simulations in Interventional Radiology: a Feasibility Study. J Digit Imaging 2022; 35:9-20. [PMID: 34997376 PMCID: PMC8854516 DOI: 10.1007/s10278-021-00553-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 10/31/2021] [Accepted: 11/22/2021] [Indexed: 12/24/2022] Open
Abstract
Three-dimensional (3D) printing of vascular structures is of special interest for procedure simulations in Interventional Radiology, but remains due to the complexity of the vascular system and the lack of biological tissue mimicking 3D printing materials a technical challenge. In this study, the technical feasibility, accuracy, and usability of a recently introduced silicone-like resin were evaluated for endovascular procedure simulations and technically compared to a commonly used standard clear resin. Fifty-four vascular models based on twenty-seven consecutive embolization cases were fabricated from preinterventional CT scans and each model was checked for printing success and accuracy by CT-scanning and digital comparison to its original CT data. Median deltas (Δ) of luminal diameters were 0.35 mm for clear and 0.32 mm for flexible resin (216 measurements in total) with no significant differences (p > 0.05). Printing success was 85.2% for standard clear and 81.5% for the novel flexible resin. In conclusion, vascular 3D printing with silicone-like flexible resin was technically feasible and highly accurate. This is the first and largest consecutive case series of 3D-printed embolizations with a novel biological tissue mimicking material and is a promising next step in patient-specific procedure simulations in Interventional Radiology.
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Affiliation(s)
- R. Kaufmann
- Department of Radiology, University Hospital Salzburg, Paracelsus Medical University, 5020 Salzburg, Austria
- Clinic of Radiology & Nuclear Medicine, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - C. J. Zech
- Clinic of Radiology & Nuclear Medicine, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - M. Takes
- Clinic of Radiology & Nuclear Medicine, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - P. Brantner
- Clinic of Radiology & Nuclear Medicine, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - F. Thieringer
- Clinic for Oral and Maxillofacial Surgery, University Hospital Basel, University of Basel, 4031 Basel, Switzerland
| | - M. Deutschmann
- Department of Radiology, University Hospital Salzburg, Paracelsus Medical University, 5020 Salzburg, Austria
| | - K. Hergan
- Department of Radiology, University Hospital Salzburg, Paracelsus Medical University, 5020 Salzburg, Austria
| | - B. Scharinger
- Department of Radiology, University Hospital Salzburg, Paracelsus Medical University, 5020 Salzburg, Austria
| | - S. Hecht
- Department of Radiology, University Hospital Salzburg, Paracelsus Medical University, 5020 Salzburg, Austria
| | - R. Rezar
- Clinic of Internal Medicine II, Department of Cardiology and Internal Intensive Care Medicine, University Hospital Salzburg, Paracelsus Medical University, 5020 Salzburg, Austria
| | - B. Wernly
- Clinic of Internal Medicine II, Department of Cardiology and Internal Intensive Care Medicine, University Hospital Salzburg, Paracelsus Medical University, 5020 Salzburg, Austria
| | - M. Meissnitzer
- Department of Radiology, University Hospital Salzburg, Paracelsus Medical University, 5020 Salzburg, Austria
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206
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Properties of CAD/CAM 3D Printing Dental Materials and Their Clinical Applications in Orthodontics: Where Are We Now? APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12020551] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
In the last years, both medicine and dentistry have come across a revolution represented by the introduction of more and more digital technologies for both diagnostic and therapeutic purposes. Additive manufacturing is a relatively new technology consisting of a computer-aided design and computer-aided manufacturing (CAD/CAM) workflow, which allows the substitution of many materials with digital data. This process requires three fundamental steps represented by the digitalization of an item through a scanner, the editing of the data acquired using a software, and the manufacturing technology to transform the digital data into a final product, respectively. This narrative review aims to discuss the recent introduction in dentistry of the abovementioned digital workflow. The main advantages and disadvantages of the process will be discussed, along with a brief description of the possible applications on orthodontics.
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207
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Gheorghevici T, Carata E, Sirbu PD, Alexa O, Poroh MG, Filip A, Forna N, Puha B. An original method of simulating the articular cartilage in the context of in vitro biomechanical studies investigating the proximal femur. Exp Ther Med 2022; 23:202. [PMID: 35126705 PMCID: PMC8794553 DOI: 10.3892/etm.2022.11125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Accepted: 10/21/2021] [Indexed: 11/15/2022] Open
Abstract
Biomechanical testing is a necessity given the development of novel implants used in the osteosynthesis of hip fractures. The purpose of biomechanical testing is to recreate realistic conditions similar to the in vivo conditions. Although biomechanical testing of hip arthroplasty has been standardized since the 1970s, there is no consensus at present on testing methodology for osteosynthesis of hip fractures. Most biomechanical studies examining the fractures of the proximal femur in order to optimize implants opt for loading the bone-implant ensemble directly on the femoral head or using a metallic loading part. This loading technique fails to perform a mechanical stress distribution similar to in vivo conditions, which could alter the outcome. The present study aimed to design loading/unloading cups with mechanical properties that resemble those of the cartilage at the hip level. Through the impression and scanning of the cast models obtained, a digital 3D model was created in STL format and this was processed in order to obtain the computer numerical control (CNC) trajectories of the printing head. For prototyping using additive manufacturing technology, a thermoplastic polymer with biochemical properties, such as tensile strength, that resemble those of the adult hip and a Stratasys FORTUS 250 mc CNC machine were used. Loading/unloading cups with similar anatomy and biomechanical forces compared with those of the adult hip were created, which allowed the experimental simulation of the conditions during walking.
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Affiliation(s)
- Teodor Gheorghevici
- Department of Orthopedics and Traumatology, ‘Sf. Spiridon’ County Clinical Emergency Hospital, 700111 Iasi, Romania
| | - Eugen Carata
- Department of Machine‑Tools and Equipment of The Faculty of Machine Constructions and Industrial Management, ‘Gheorghe Asachi’ Technical University, 700050 Iasi, Romania
| | - Paul-Dan Sirbu
- Department of Orthopedics and Traumatology, Faculty of Medicine, ‘Grigore T. Popa’ University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Ovidiu Alexa
- Department of Orthopedics and Traumatology, ‘Sf. Spiridon’ County Clinical Emergency Hospital, 700111 Iasi, Romania
| | - Manuela-Gabi Poroh
- Department of Orthopedics and Traumatology, Faculty of Medicine, ‘Grigore T. Popa’ University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Alexandru Filip
- Department of Orthopedics and Traumatology, Faculty of Medicine, ‘Grigore T. Popa’ University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Norin Forna
- Department of Orthopedics and Traumatology, Faculty of Medicine, ‘Grigore T. Popa’ University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Bogdan Puha
- Department of Orthopedics and Traumatology, ‘Sf. Spiridon’ County Clinical Emergency Hospital, 700111 Iasi, Romania
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208
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Eassa HA, Helal NA, Amer AM, Fouad A, Bedair AF, Nagib R, Mansoor I, Hawash M, Abdul-Latif M, Mohammed KHA, Helal MA, Nounou MI. 3D-Printed Microfluidics Potential in Combating Future and Current Pandemics (COVID-19). RECENT ADVANCES IN DRUG DELIVERY AND FORMULATION 2022; 16:192-216. [PMID: 35894464 DOI: 10.2174/2667387816666220727101214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 05/04/2022] [Accepted: 05/10/2022] [Indexed: 06/15/2023]
Abstract
Coronavirus disease (COVID-19) emerged in China in December 2019. In March 2020, the WHO declared it a pandemic leading to worldwide lockdowns and travel restrictions. By May, it infected 4,789,205 and killed 318,789 people. This led to severe shortages in the medical sector besides devastating socio-economic effects. Many technologies such as artificial intelligence (AI), virtual reality (VR), microfluidics, 3D printing, and 3D scanning can step into contain the virus and hinder its extensive spread. This article aims to explore the potentials of 3D printing and microfluidic in accelerating the diagnosis and monitoring of the disease and fulfilling the shortages of personal protective equipment (PPE) and medical equipment. It highlights the main applications of 3D printers and microfluidics in providing PPE (masks, respirators, face shields, goggles, and isolation chambers/hoods), supportive care (respiratory equipment) and diagnostic supplies (sampling swabs & lab-on-chip) to ease the COVID-19 pressures. Also, the cost of such technology and regulation considerations are addressed. We conclude that 3D printing provided reusable and low-cost solutions to mitigate the shortages. However, safety, sterility, and compatibility with environmental protection standards need to be guaranteed through standardization and assessment by regulatory bodies. Finally, lessons learned from this pandemic can also help the world prepare for upcoming outbreaks.
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Affiliation(s)
- Heba A Eassa
- Department of Pharmaceutical Sciences, School of Pharmacy & Physician Assistant Studies, University of Saint Joseph, Hartford, CT 06103, USA
| | - Nada A Helal
- Pharmaceutical Sciences, Irma Lerma Rangel College of Pharmacy, Texas A&M University, TX, 78363, USA
| | - Ahmed M Amer
- Department of Clinical and Molecular Medicine, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Aliaa Fouad
- Division of Pathological Sciences, Department of Pharmacology and Experimental Therapeutics, Kyoto Pharmaceutical University, Kyoto, Japan
| | - Asser F Bedair
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Alexandria University, Alexandria, Egypt
| | | | | | - Motaz Hawash
- Dept of Food Science and Agri-Food Supply Chains, Harper Adams University, Newport, UK
| | | | - Kamilia H A Mohammed
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy (Girls), Al- Azhar University, Cairo, Egypt
| | - Mohamed A Helal
- Construction Planning Department, National Marine Dredging Company (NMDC), Abu Dhabi 11372, United Arab Emirates
| | - Mohamed Ismail Nounou
- Department of Pharmaceutical Sciences, School of Pharmacy & Physician Assistant Studies, University of Saint Joseph, Hartford, CT 06103, USA
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209
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Versace DL, Breloy L, Brezova V, Abbad Andalloussi S, Malval JP, Richeter S, Clément S. Bio-based porphyrins pyropheophorbide a and its Zn-complex as performing visible-light photosensitizers for free-radical photopolymerization. Polym Chem 2022. [DOI: 10.1039/d1py01714d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A chlorophyll a derivative, namely pyropheophorbide a (Pyro), and the corresponding zinc (II) complex (Zn-Pyro) were used for the first time as performing visible-light photosensitizers (PS) for free-radical photopolymerization (FRP)...
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210
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Kho Y, Yoon HS, Park DH, Do MT, Jung G, Cho SY. Effectiveness of a newly-developed training module using 3D printing for the navigation during retrograde intrarenal surgery. Investig Clin Urol 2022; 63:554-562. [PMID: 36068001 PMCID: PMC9448668 DOI: 10.4111/icu.20220205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 07/24/2022] [Accepted: 08/01/2022] [Indexed: 12/01/2022] Open
Abstract
Purpose This study aimed to evaluate the feasibility of the newly-developed three-dimensional (3D) printed training module for navigation during retrograde intrarenal surgery. Materials and Methods Two specialists provided orientation to all trainees. The 3D printing model consisted of eight calyces in each kidney. One navigation time started from the moment when the endoscope entered the ureter. After navigation was completed, the navigation time was recorded. The goal was to perform ten navigation times for each side, starting from the right or the left side at random. After the experiment, all trainees were asked to fill out a questionnaire. Results The average training period of all 17 trainees was 3.05±1.80 years. Eleven trainees (64.7%) had the experience of assisting surgery for <100 cases, and six trainees (35.3%) had the experience of assisting surgery for 100 to 500 cases. Nine trainees (52.9%) began training from the right, and eight trainees (47.1%) started from the left. The average navigation time of 308 trials was 153.4±92.6 seconds. The maximum and minimum navigation times were 354.3±177.2 seconds and 80.1±25.6 seconds. The mean navigation time of the first and the last trials of all trainees significantly decreased from 251.4±108.0 seconds to 93.9±33.2 seconds. The average reduction in navigation time was 201.3±133.3 seconds. Almost all trainees were satisfied with the training. Conclusions The newly-developed 3D printing navigation training module seems to be adequate to improve surgical skills of flexible ureteroscopy.
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Affiliation(s)
- Yongseok Kho
- Department of Urology, Seoul National University Hospital, Seoul, Korea
| | - Hyun Sik Yoon
- Department of Urology, Dongguk University Ilsan Hospital, Goyang, Korea
| | - Dae Hyoung Park
- Department of Urology, Inje University Sanggye Paik Hospital, Seoul, Korea
| | - Minh-Tung Do
- Department of Urology, Seoul National University Hospital, Seoul, Korea
- Department of Surgery, Hai Phong University of Medicine and Pharmacy, Hai Phong, Vietnam
| | - Gyoohwan Jung
- Department of Urology, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Sung Yong Cho
- Department of Urology, Seoul National University Hospital, Seoul, Korea
- Department of Urology, Seoul National University College of Medicine, Seoul, Korea
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211
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Lee J, Li L, Song HY, Son MJ, Lee YM, Koo KT. Impact of lattice versus solid structure of 3D-printed multiroot dental implants using Ti-6Al-4V: a preclinical pilot study. J Periodontal Implant Sci 2022; 52:338-350. [PMID: 36047586 PMCID: PMC9436642 DOI: 10.5051/jpis.2105720286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 12/28/2021] [Accepted: 01/11/2022] [Indexed: 11/15/2022] Open
Abstract
Purpose Various studies have investigated 3-dimensional (3D)-printed implants using Ti-6Al-4V powder; however, multi-root 3D-printed implants have not been fully investigated. The purpose of this study was to explore the stability of multirooted 3D-printed implants with lattice and solid structures. The secondary outcomes were comparisons between the 2 types of 3D-printed implants in micro-computed tomographic and histological analyses. Methods Lattice- and solid-type 3D-printed implants for the left and right mandibular third premolars in beagle dogs were fabricated. Four implants in each group were placed immediately following tooth extraction. Implant stability measurement and periapical X-rays were performed every 2 weeks for 12 weeks. Peri-implant bone volume/tissue volume (BV/TV) and bone mineral density (BMD) were measured by micro-computed tomography. Bone-to-implant contact (BIC) and bone area fraction occupancy (BAFO) were measured in histomorphometric analyses. Results All 4 lattice-type 3D-printed implants survived. Three solid-type 3D-printed implants were removed before the planned sacrifice date due to implant mobility. A slight, gradual increase in implant stability values from implant surgery to 4 weeks after surgery was observed in the lattice-type 3D-printed implants. The marginal bone change of the surviving solid-type 3D-printed implant was approximately 5 mm, whereas the value was approximately 2 mm in the lattice-type 3D-printed implants. BV/TV and BMD in the lattice type 3D-printed implants were similar to those in the surviving solid-type implant. However, BIC and BAFO were lower in the surviving solid-type 3D-printed implant than in the lattice-type 3D-printed implants. Conclusions Within the limits of this preclinical study, 3D-printed implants of double-rooted teeth showed high primary stability. However, 3D-printed implants with interlocking structures such as lattices might provide high secondary stability and successful osseointegration.
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Affiliation(s)
- Jungwon Lee
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
- One-Stop Specialty Center, Seoul National University Dental Hospital, Seoul, Korea
| | - Ling Li
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Hyun-Young Song
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Min-Jung Son
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Yong-Moo Lee
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
| | - Ki-Tae Koo
- Department of Periodontology and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, Korea
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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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213
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Wagner M, Werther T, Unger E, Kasprian G, Dovjak G, Dorfer C, Schned H, Steinbauer P, Goeral K, Olischar M, Roessler K, Berger A, Oberoi G. Development of a 3D printed patient-specific neonatal brain simulation model using multimodality imaging for perioperative management. Pediatr Res 2022; 91:64-69. [PMID: 33654283 DOI: 10.1038/s41390-021-01421-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 02/01/2021] [Indexed: 11/09/2022]
Abstract
BACKGROUND Medical-imaging-based three-dimensional (3D) printed models enable improvement in skills training, surgical planning, and decision-making. This pilot study aimed to use multimodality imaging and to add and compare 3D ultrasound as a future standard to develop realistic neonatal brain models including the ventricular system. METHODS Retrospective computed tomography (CT), magnetic resonance imaging (MRI), and 3D ultrasound-based brain imaging protocols of five neonatal patients were analyzed and subsequently segmented with the aim of developing a multimodality imaging-based 3D printed model. The ventricular anatomy was analyzed to compare the MRI and 3D ultrasound modalities. RESULTS A realistic anatomical model of the neonatal brain, including the ventricular system, was created using MRI and 3D ultrasound data from one patient. T2-weighted isovoxel 3D MRI sequences were found to have better resolution and accuracy than 2D sequences. The surface area, anatomy, and volume of the lateral ventricles derived from both MRI and 3D ultrasound were comparable. CONCLUSIONS We created an ultrasound- and MRI-based 3D printed patient-specific neonatal brain simulation model that can be used for perioperative management. To introduce 3D ultrasound as a standard for 3D models, additional dimensional correlations between MRI and ultrasound need to be examined. IMPACT We studied the feasibility of implementing 3D ultrasound as a standard for 3D printed models of the neonatal brain. Different imaging modalities were compared and both 3D isotropic MRI and 3D ultrasound imaging are feasible for printing neonatal brain models with good dimensional accuracy and anatomical replication. Further dimensional correlations need to be defined to implement it as a standard to produce 3D printed models.
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Affiliation(s)
- Michael Wagner
- Department of Pediatrics and Adolescent Medicine, Division of Neonatology, Intensive Care Medicine and Neuropediatrics, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria.
| | - Tobias Werther
- Department of Pediatrics and Adolescent Medicine, Division of Neonatology, Intensive Care Medicine and Neuropediatrics, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Ewald Unger
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
| | - Gregor Kasprian
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Gregor Dovjak
- Department of Biomedical Imaging and Image-guided Therapy, Medical University of Vienna, Vienna, Austria
| | - Christian Dorfer
- Department of Neurosurgery, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Hannah Schned
- Department of Pediatrics and Adolescent Medicine, Division of Neonatology, Intensive Care Medicine and Neuropediatrics, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Philipp Steinbauer
- Department of Pediatrics and Adolescent Medicine, Division of Neonatology, Intensive Care Medicine and Neuropediatrics, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Katharina Goeral
- Department of Pediatrics and Adolescent Medicine, Division of Neonatology, Intensive Care Medicine and Neuropediatrics, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Monika Olischar
- Department of Pediatrics and Adolescent Medicine, Division of Neonatology, Intensive Care Medicine and Neuropediatrics, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Karl Roessler
- Department of Neurosurgery, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Angelika Berger
- Department of Pediatrics and Adolescent Medicine, Division of Neonatology, Intensive Care Medicine and Neuropediatrics, Comprehensive Center for Pediatrics, Medical University of Vienna, Vienna, Austria
| | - Gunpreet Oberoi
- Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria
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Athari M, Golbakhsh MR, Mirbolook A, Athari M, Ahmadi A, Komlakh K, Azarhomayoun A, Paydarniya P. Posterior First and Second Cervical Vertebrae Fusion by Screw Fixation Technique using the Modern Pre-fabricated Template Method on Cadaver Samples. Malays Orthop J 2021; 15:58-64. [PMID: 34966496 PMCID: PMC8667244 DOI: 10.5704/moj.2111.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 07/29/2021] [Indexed: 11/05/2022] Open
Abstract
Introduction C1 lateral mass and C2 pedicular screws insertion are used for C1-C2 posterior fusion. Fluoroscopy Guided technique is routinely used for screw placement but it is associated with risk of injury to spinal cord and vertebral artery. 3D printing has developed rapidly in the fields of medicine. It is helpful in improving precise treatment and used for instrumentation in spine. We want to evaluate the accuracy of C1 lateral mass screws and C2 pedicle screws insertion by Pre-Fabricated Template made by three-dimensional (3D) printing. Materials and methods Five cervical samples were obtained from cadavers. Based on fine-cut CT scan 3D-images reconstructed and the path of the screws designed by special software. A template produced by 3D-printer from 3D images. After printing the templates, they were fixed on the relevant vertebra in the operation room and based on the template path, C1 lateral mass screw and C2 pedicular screws were inserted. Placement of the screws was evaluated using CT scans post-operatively. Results A total of 14 screws were inserted by above-mentioned method. After evaluation with CT scans none of the screws were entered in the spinal canal. Two screws had vertebral artery canal perforation with less than 50% breach. Violation was judged as noncritical and would probably not have resulted in injury to vertebral artery. Conclusions The accuracy of C1 lateral mass screw and C2 pedicle screw insertion is acceptable with pre-fabricated template and can provide a useful aid for screw placement.
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Affiliation(s)
- M Athari
- Department of Orthopaedics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M R Golbakhsh
- Department of Orthopaedics, Tehran University of Medical Sciences, Tehran, Iran
| | - A Mirbolook
- Department of Orthopaedics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M Athari
- Department of Orthopaedics, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - A Ahmadi
- Department of Orthopaedics, Tehran University of Medical Sciences, Tehran, Iran
| | - K Komlakh
- Department of Neurosurgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - A Azarhomayoun
- Department of Neurosurgery, Sina Trauma and Surgery Research Center, Tehran, Iran
| | - P Paydarniya
- Department of Neurosurgery, Tehran University of Medical Sciences, Tehran, Iran
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215
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Fazeli N, Arefian E, Irani S, Ardeshirylajimi A, Seyedjafari E. 3D-Printed PCL Scaffolds Coated with Nanobioceramics Enhance Osteogenic Differentiation of Stem Cells. ACS OMEGA 2021; 6:35284-35296. [PMID: 34984260 PMCID: PMC8717387 DOI: 10.1021/acsomega.1c04015] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 11/22/2021] [Indexed: 06/01/2023]
Abstract
With advances in bone tissue engineering, various materials and methods have been explored to find a better scaffold that can help in improving bone growth and regeneration. Three-dimensional (3D) printing by fused deposition modeling can produce customized scaffolds from biodegradable polyesters such as polycaprolactone (PCL). Although the fabricated PCL scaffolds exhibited a lack of bioactivity and poor cell attachment on their surfaces, herein, using a simple postfabrication modification method with hydroxyapatite (HA) and bioglasses (BGs), we obtained better cell proliferation and attachment. Biological behavior and osteosupportive capacity of the 3D-printed scaffolds including PCL, PCL/HA, PCL/BG, and PCL/HA/BG were evaluated in this study, while human adipose tissue-derived mesenchymal stem cells (hADSCs) were cultured on the scaffolds. The cell morphology, attachment, and proliferation were investigated using scanning electron microscopy (SEM), 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, and 4',6-diamidino-2-phenylindole (DAPI) staining. In the next step, the ability of stem cells to differentiate into osteoblasts was evaluated by measuring alkaline phosphatase (ALP) activity, calcium deposition, and bone-related gene and protein expression. In the end, the expression levels of miR-20a, miR-125a, and their target genes were also investigated as positive and negative regulators in osteogenesis pathways. The results showed that the coated scaffolds with bioceramics present a more appropriate surface for cell adhesion and proliferation, as well as efficient potential in inducing osteoconduction and osteointegration compared to PCL alone and control. The PCL/HA/BG scaffold exhibited higher in vitro cell viability and bone formation compared to the other groups, which can be due to the synergistic effect of HA and BG. On the whole, this tricomponent 3D-printing scaffold has a promising prospect for bone tissue engineering applications.
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Affiliation(s)
- Nasrin Fazeli
- Department
of Biology, Science and Research Branch, Islamic Azad University, Tehran 14778 93855, Iran
| | - Ehsan Arefian
- Department of Microbiology, School of Biology,
College of Science, University of Tehran, Tehran 14179 35840, Iran
| | - Shiva Irani
- Department
of Biology, Science and Research Branch, Islamic Azad University, Tehran 14778 93855, Iran
| | - Abdolreza Ardeshirylajimi
- Urogenital
Stem Cell Research Center, Shahid Beheshti
University of Medical Sciences, Tehran 19839 63113, Iran
| | - Ehsan Seyedjafari
- Department
of Biotechnology, College of Science, University
of Tehran, Tehran 14179 35840, Iran
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216
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Colverde AS, Nicetto T, Falzone C. Occipital cranioplasty using customized titanium prosthesis yields successful outcome in association with foramen magnum decompression in dogs suffering by Chiari-like malformation. Am J Vet Res 2021; 83:275-282. [PMID: 34968186 DOI: 10.2460/ajvr.21.11.0178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To describe the use of a customized 3-D-printed titanium prosthesis as adjunctive treatment for foramen magnum decompression (FMD) in dogs with Chiari-like malformation (CM) and syringomyelia (SM). ANIMALS 8 dogs with clinical signs and MRI findings of CM-SM. PROCEDURES 3-D reconstruction of CT images of the head was used to simulate an occipital craniectomy and design the prosthesis. FMD was performed, and the prosthesis was implanted. Follow-up was performed 1, 6, and 12 months later, and clinical status was scored. Repeated MRI images were compared to identify changes involving the neural structures, particularly the syrinx. RESULTS All prostheses were easily positioned based on the preoperative 3-D models, with no complications. At 12 months after surgery, 3 dogs were free of previous medications, 4 were still receiving steroid medications but at lower doses, and 1 was occasionally receiving acupuncture. MRI of 5 dogs 6 to 20 months after surgery revealed resolution of SM (n = 1), reduced size of SM (3), or worse SM (1). All dogs showed an increase in size of the caudal cranial fossa. Dogs with a longer presurgical duration of the clinical signs and wider syrinx generally had worse outcomes than other dogs. CLINICAL RELEVANCE Findings suggested that use of customized 3-D-printed titanium prosthesis and associated FMD can represent an adjunctive option to medically treated dogs with CM-SM. Although the small number of cases precludes definitive conclusions, early surgical treatment, particularly in dogs with a small syrinx, could ensure better long-term outcomes, as previously suggested.
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217
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Dautzenberg P, Volk HA, Huels N, Cieciora L, Dohmen K, Lüpke M, Seifert H, Harms O. The effect of steam sterilization on different 3D printable materials for surgical use in veterinary medicine. BMC Vet Res 2021; 17:389. [PMID: 34949184 PMCID: PMC8697434 DOI: 10.1186/s12917-021-03065-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 11/03/2021] [Indexed: 11/28/2022] Open
Abstract
Background Different 3D-printed materials polyactic acid (PLA), polyamide (PA), polycarbonates (PC), acrylonitrile butadiene styrene (ABS) and GreenTEC Pro®I have been considered for surgical templates, but there is a sparity of data about how these materials are affected by steam sterilization. The aim of the current study was to test if and how these materials change morphologically when high temperature, pressure and humidity are applied during the steam sterilization process. The overall aim is to create patient-specific sawing templates for performing corrective osteotomies. After the designing process, test-specimens with five different materials: PLA, PC, ABS, PA and GreenTEC Pro® were 3D-printed in two filling grades (30 and 100%). The FDM method was used for printing. After 3D-printing, the test-specimens were steam sterilized with a standard program lasting 20 min, at a temperature of 121 °C and a pressure of 2–3 bar. In order to measure the deviation of the printed model, we measured the individual test-specimens before and after steam sterilization using a sliding gauge. Results PC, PA and ABS showed great morphological deviations from the template after 3D-printing and steam sterilization (> 1%) respectively. ABS proved unsuitable for steam sterilization. PLA and GreenTEC Pro® demonstrated fewer morphological deviations both before and after sterilization. Therefore, we decided to perform a second test just with PLA and Green-TEC Pro® to find out which material has the highest stability and is probably able to be used for clinical application. The smallest deviations were found with the GreenTEC Pro® solid body. After autoclaving, the specimens showed a deviation from the planned body and remained below the 1% limit. Conclusion Steam sterilization causes morphological deviations in 3D printed objects. GreenTEC Pro® seems to be a suitable material for clinical use, not only for intraoperative use, but also for precise modeling. Microbiological examination, as well as biomechanical tests, should be performed to further assess whether intraoperative use is possible. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-021-03065-8.
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Affiliation(s)
- Philipp Dautzenberg
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany.
| | - Holger A Volk
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany
| | - Nikolaus Huels
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany
| | - Lena Cieciora
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany
| | - Katharina Dohmen
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany
| | - Matthias Lüpke
- Department of General Radiology and Medical Physics, University of Veterinary Medicine Hanover, Bischofsholer Damm 15, 30173, Hannover, Germany
| | - Herman Seifert
- Department of General Radiology and Medical Physics, University of Veterinary Medicine Hanover, Bischofsholer Damm 15, 30173, Hannover, Germany
| | - Oliver Harms
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany
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218
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Wong RMY, Wong PY, Liu C, Chung YL, Wong KC, Tso CY, Chow SKH, Cheung WH, Yung PSH, Chui CS, Law SW. 3D printing in orthopaedic surgery: a scoping review of randomized controlled trials. Bone Joint Res 2021; 10:807-819. [PMID: 34923849 PMCID: PMC8696518 DOI: 10.1302/2046-3758.1012.bjr-2021-0288.r2] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Aims The use of 3D printing has become increasingly popular and has been widely used in orthopaedic surgery. There has been a trend towards an increasing number of publications in this field, but existing literature incorporates limited high-quality studies, and there is a lack of reports on outcomes. The aim of this study was to perform a scoping review with Level I evidence on the application and effectiveness of 3D printing. Methods A literature search was performed in PubMed, Embase, and Web of Science databases. The keywords used for the search criteria were ((3d print*) OR (rapid prototyp*) OR (additive manufactur*)) AND (orthopaedic). The inclusion criteria were: 1) use of 3D printing in orthopaedics, 2) randomized controlled trials, and 3) studies with participants/patients. Risk of bias was assessed with Cochrane Collaboration Tool and PEDro Score. Pooled analysis was performed. Results Overall, 21 studies were included in our study with a pooled total of 932 participants. Pooled analysis showed that operating time (p < 0.001), blood loss (p < 0.001), fluoroscopy times (p < 0.001), bone union time (p < 0.001), pain (p = 0.040), accuracy (p < 0.001), and functional scores (p < 0.001) were significantly improved with 3D printing compared to the control group. There were no significant differences in complications. Conclusion 3D printing is a rapidly developing field in orthopaedics. Our findings show that 3D printing is advantageous in terms of operating time, blood loss, fluoroscopy times, bone union time, pain, accuracy, and function. The use of 3D printing did not increase the risk of complications. Cite this article: Bone Joint Res 2021;10(12):807–819.
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Affiliation(s)
- Ronald Man Yeung Wong
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong.,Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
| | - Pui Yan Wong
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Chaoran Liu
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Yik Lok Chung
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Kwok Chuen Wong
- Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
| | - Chi Yin Tso
- Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
| | - Simon Kwoon-Ho Chow
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Wing-Hoi Cheung
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Patrick Shu-Hang Yung
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong.,Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
| | - Chun Sing Chui
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Sheung Wai Law
- Department of Orthopaedics & Traumatology, The Chinese University of Hong Kong, Hong Kong, Hong Kong.,Department of Orthopaedics & Traumatology, Prince of Wales Hospital, Hong Kong, Hong Kong
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219
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Lin X, Zhou Z, Li S, Gao Y, Zheng X. Digital guides to facilitate retained root removal and simultaneous implant placement. Int J Oral Maxillofac Surg 2021; 51:957-961. [PMID: 34924270 DOI: 10.1016/j.ijom.2021.12.002] [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: 03/29/2021] [Revised: 09/22/2021] [Accepted: 12/06/2021] [Indexed: 11/30/2022]
Abstract
The aim of this study was to report the use of digital guides to locate impacted residual roots (IRR) (location guide) and to simultaneously insert dental implants (surgical guide). This case series included five patients. The IRR was first removed through a lateral window approach using the digital location guide, then the implant was placed simultaneously with the implant surgical guide. Definitive restorations were completed after a 6-month healing period. An average of 13.0 ± 3.1 minutes was required to locate the IRR. The implant stability quotient (ISQ) was obtained during surgery and before digital coping using a non-invasive resonance frequency measurement. The average ISQ during surgery for the five dental implants was 60.2 ± 6.3, and the value increased to 66.6 ± 4.8 before final restoration. The average deviations at the implant neck and root apex were 0.48 ± 0.25 mm and 0.74 ± 0.46 mm, respectively. The average angular deviation was 3.5 ± 1.4°. Bone resorption at the implant neck was a mean 0.072 ± 0.041 mm before final restoration. All implants functioned well at 1 year after final restoration. The application of surgical guides in the extraction of IRR enabled crestal bone preservation and simultaneous implant placement.
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Affiliation(s)
- X Lin
- Affiliated Stomatological Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Z Zhou
- Affiliated Stomatological Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - S Li
- Affiliated Stomatological Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - Y Gao
- Affiliated Stomatological Hospital, Southern Medical University, Guangzhou, People's Republic of China
| | - X Zheng
- Affiliated Stomatological Hospital, Southern Medical University, Guangzhou, People's Republic of China.
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220
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Makram AM, Makram OM, Youssef M, Hafez MA. Comparison of the logistics between the conventional instruments and patient-specific templating in total knee replacement in the low-income setting. HEALTH POLICY AND TECHNOLOGY 2021. [DOI: 10.1016/j.hlpt.2021.100581] [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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221
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Puls N, Carluccio D, Batstone MD, Novak JI. The rise of additive manufacturing for ocular and orbital prostheses: A systematic literature review. ANNALS OF 3D PRINTED MEDICINE 2021. [DOI: 10.1016/j.stlm.2021.100036] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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222
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Krauel L, Valls-Esteve A, Tejo-Otero A, Fenollosa-Artés F. 3D-Printing in surgery: Beyond bone structures. A review. ANNALS OF 3D PRINTED MEDICINE 2021. [DOI: 10.1016/j.stlm.2021.100039] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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223
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Asif A, Lee E, Caputo M, Biglino G, Shearn AIU. Role of 3D printing technology in paediatric teaching and training: a systematic review. BMJ Paediatr Open 2021; 5:10.1136/bmjpo-2021-001050. [PMID: 35290958 PMCID: PMC8655595 DOI: 10.1136/bmjpo-2021-001050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/15/2021] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND In the UK, undergraduate paediatric training is brief, resulting in trainees with a lower paediatric knowledge base compared with other aspects of medicine. With congenital conditions being successfully treated at childhood, adult clinicians encounter and will need to understand these complex pathologies. Patient-specific 3D printed (3DP) models have been used in clinical training, especially for rarer, complex conditions. We perform a systematic review to evaluate the evidence base in using 3DP models to train paediatricians, surgeons, medical students and nurses. METHODS Online databases PubMed, Web of Science and Embase were searched between January 2010 and April 2020 using search terms relevant to "paediatrics", "education", "training" and "3D printing". Participants were medical students, postgraduate trainees or clinical staff. Comparative studies (patient-specific 3DP models vs traditional teaching methods) and non-comparative studies were included. Outcomes gauged objective and subjective measures: test scores, time taken to complete tasks, self-reported confidence and personal preferences on 3DP models. If reported, the cost of and time taken to produce the models were noted. RESULTS From 587 results, 15 studies fit the criteria of the review protocol, with 5/15 being randomised controlled studies and 10/15 focussing on cardiovascular conditions. Participants using 3DP models demonstrated improved test scores and faster times to complete procedures and identify anatomical landmarks compared with traditional teaching methods (2D diagrams, lectures, videos and supervised clinical events). User feedback was positive, reporting greater user self-confidence in understanding concepts with users wishing for integrated use of 3DP in regular teaching. Four studies reported the costs and times of production, which varied depending on model complexity and printer. 3DP models were cheaper than 'off-the-shelf' models available on the market and had the benefit of using real-world pathologies. These mostly non-randomised and single-centred studies did not address bias or report long-term or clinically translatable outcomes. CONCLUSIONS 3DP models were associated with greater user satisfaction and good short-term educational outcomes, with low-quality evidence. Multicentred, randomised studies with long-term follow-up and clinically assessed outcomes are needed to fully assess their benefits in this setting. PROSPERO REGISTRATION NUMBER CRD42020179656.
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Affiliation(s)
- Ashar Asif
- Bristol Medical School, University of Bristol, Bristol, UK
| | - Elgin Lee
- Children's Services Directorate, Newcastle Upon Tyne Hospitals NHS Foundation Trust, Newcastle Upon Tyne, UK
| | - Massimo Caputo
- Bristol Medical School, University of Bristol, Bristol, UK.,Bristol Heart Institute, University Hospitals Bristol and Weston NHS Trust, Bristol, UK
| | - Giovanni Biglino
- Bristol Heart Institute, University Hospitals Bristol and Weston NHS Trust, Bristol, UK.,National Heart and Lung Institute, Imperial College London, London, UK
| | - Andrew Ian Underwood Shearn
- Bristol Medical School, University of Bristol, Bristol, UK .,Bristol Heart Institute, University Hospitals Bristol and Weston NHS Trust, Bristol, UK
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224
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Thatcher GP, Soukup JW. Virtual Surgical Planning and 3D Printing in Veterinary Dentistry and Oromaxillofacial Surgery. Vet Clin North Am Small Anim Pract 2021; 52:221-234. [PMID: 34838251 DOI: 10.1016/j.cvsm.2021.09.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Virtual surgical planning and three-dimensional (3D) printing are preoperative processes requiring the acquisition of high-quality imaging data. A surgical treatment plan is created and rehearsed virtually as the operator manipulates the 3D images of the patient within the software. When the operator is satisfied with the plan, including anticipated osteotomies, tumor excision margins, and reconstruction options, physical 3D prints can be produced. This article introduces the reader to the basic concepts involved in virtual surgical planning and 3D printing as well as their implementation in veterinary oromaxillofacial surgery.
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Affiliation(s)
- Graham P Thatcher
- University of Wisconsin-Madison, School of Veterinary Medicine, 2015 Linden Drive, Madison, WI 53706, USA
| | - Jason W Soukup
- University of Wisconsin-Madison, School of Veterinary Medicine, 2015 Linden Drive, Madison, WI 53706, USA.
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225
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Turek P, Pakla P, Budzik G, Lewandowski B, Przeszłowski Ł, Dziubek T, Wolski S, Frańczak J. Procedure Increasing the Accuracy of Modelling and the Manufacturing of Surgical Templates with the Use of 3D Printing Techniques, Applied in Planning the Procedures of Reconstruction of the Mandible. J Clin Med 2021; 10:jcm10235525. [PMID: 34884227 PMCID: PMC8658254 DOI: 10.3390/jcm10235525] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/22/2021] [Accepted: 11/22/2021] [Indexed: 12/19/2022] Open
Abstract
The application of anatomical models and surgical templates in maxillofacial surgery allows, among other benefits, the increase of precision and the shortening of the operation time. Insufficiently precise anastomosis of the broken parts of the mandible may adversely affect the functioning of this organ. Applying the modern mechanical engineering methods, including computer-aided design methods (CAD), reverse engineering (RE), and rapid prototyping (RP), a procedure used to shorten the data processing time and increase the accuracy of modelling anatomical structures and the surgical templates with the use of 3D printing techniques was developed. The basis for developing and testing this procedure was the medical imaging data DICOM of patients treated at the Maxillofacial Surgery Clinic of the Fryderyk Chopin Provincial Clinical Hospital in Rzeszów. The patients were operated on because of malignant tumours of the floor of the oral cavity and the necrosis of the mandibular corpus, requiring an extensive resection of the soft tissues and resection of the mandible. Familiarity with and the implementation of the developed procedure allowed doctors to plan the operation precisely and prepare the surgical templates and tools in terms of the expected accuracy of the procedures. The models obtained based on this procedure shortened the operation time and increased the accuracy of performance, which accelerated the patient’s rehabilitation in the further course of events.
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Affiliation(s)
- Paweł Turek
- Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 35-959 Rzeszów, Poland; (G.B.); (Ł.P.); (T.D.)
- Correspondence:
| | - Paweł Pakla
- Department of Maxillofacial Surgery, Fryderyk Chopin Clinical Voivodeship Hospital No.1 in Rzeszów, 35-055 Rzeszów, Poland; (P.P.); (B.L.); (J.F.)
| | - Grzegorz Budzik
- Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 35-959 Rzeszów, Poland; (G.B.); (Ł.P.); (T.D.)
| | - Bogumił Lewandowski
- Department of Maxillofacial Surgery, Fryderyk Chopin Clinical Voivodeship Hospital No.1 in Rzeszów, 35-055 Rzeszów, Poland; (P.P.); (B.L.); (J.F.)
- Collegium Medicum, University of Rzeszów, 35-315 Rzeszów, Poland
| | - Łukasz Przeszłowski
- Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 35-959 Rzeszów, Poland; (G.B.); (Ł.P.); (T.D.)
| | - Tomasz Dziubek
- Faculty of Mechanical Engineering and Aeronautics, Rzeszów University of Technology, 35-959 Rzeszów, Poland; (G.B.); (Ł.P.); (T.D.)
| | - Sławomir Wolski
- Faculty of Mathematics and Applied Physics, Rzeszów University of Technology, 35-959 Rzeszów, Poland;
| | - Jan Frańczak
- Department of Maxillofacial Surgery, Fryderyk Chopin Clinical Voivodeship Hospital No.1 in Rzeszów, 35-055 Rzeszów, Poland; (P.P.); (B.L.); (J.F.)
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226
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Lu Y, Song J, Yao X, An M, Shi Q, Huang X. 3D Printing Polymer-based Bolus Used for Radiotherapy. Int J Bioprint 2021; 7:414. [PMID: 34805595 PMCID: PMC8600301 DOI: 10.18063/ijb.v7i4.414] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 07/21/2021] [Indexed: 12/24/2022] Open
Abstract
Bolus is a kind of auxiliary device used in radiotherapy for the treatment of superficial lesions such as skin cancer. It is commonly used to increase skin dose and overcome the skin-sparing effect. Despite the availability of various commercial boluses, there is currently no bolus that can form full contact with irregular surface of patients' skin, and incomplete contact would result in air gaps. The resulting air gaps can reduce the surface radiation dose, leading to a discrepancy between the delivered dose and planned dose. To avoid this limitation, the customized bolus processed by three-dimensional (3D) printing holds tremendous potential for making radiotherapy more efficient than ever before. This review mainly summarized the recent development of polymers used for processing bolus, 3D printing technologies suitable for polymers, and customization of 3D printing bolus. An ideal material for customizing bolus should not only have the feature of 3D printability for customization, but also possess radiotherapy adjuvant performance as well as other multiple compound properties, including tissue equivalence, biocompatibility, antibacterial activity, and antiphlogosis.
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Affiliation(s)
- Ying Lu
- Laboratory of Biomaterial Surface and Interface, School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, China.,Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Taiyuan 030032, Shanxi Province, China
| | - Jianbo Song
- Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Taiyuan 030032, Shanxi Province, China
| | - Xiaohong Yao
- Laboratory of Biomaterial Surface and Interface, School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, China
| | - Meiwen An
- Institute of Applied Mechanics and Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, China
| | - Qinying Shi
- Shanxi Bethune Hospital, Shanxi Academy of Medical Sciences, Taiyuan 030032, Shanxi Province, China
| | - Xiaobo Huang
- Laboratory of Biomaterial Surface and Interface, School of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi Province, China
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227
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Jaksa L, Pahr D, Kronreif G, Lorenz A. Development of a Multi-Material 3D Printer for Functional Anatomic Models. Int J Bioprint 2021; 7:420. [PMID: 34805598 PMCID: PMC8600298 DOI: 10.18063/ijb.v7i4.420] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 09/01/2021] [Indexed: 01/19/2023] Open
Abstract
Anatomic models are important in medical education and pre-operative planning as they help students or doctors prepare for real scenarios in a risk-free way. Several experimental anatomic models were made with additive manufacturing techniques to improve geometric, radiological, or mechanical realism. However, reproducing the mechanical behavior of soft tissues remains a challenge. To solve this problem, multi-material structuring of soft and hard materials was proposed in this study, and a three-dimensional (3D) printer was built to make such structuring possible. The printer relies on extrusion to deposit certain thermoplastic and silicone rubber materials. Various objects were successfully printed for testing the feasibility of geometric features such as thin walls, infill structuring, overhangs, and multi-material interfaces. Finally, a small medical image-based ribcage model was printed as a proof of concept for anatomic model printing. The features enabled by this printer offer a promising outlook on mimicking the mechanical properties of various soft tissues.
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Affiliation(s)
- Laszlo Jaksa
- Austrian Center for Medical Innovation and Technology (ACMIT Gmbh), Viktor-Kaplan-Strasse 2/A, 2700 Wiener Neustadt, Austria.,Technical University of Vienna, Institute of Lightweight Design and Structural Biomechanics, Object 8, Gumpendorfer Strasse 7, 1060 Vienna, Austria
| | - Dieter Pahr
- Technical University of Vienna, Institute of Lightweight Design and Structural Biomechanics, Object 8, Gumpendorfer Strasse 7, 1060 Vienna, Austria.,Karl Landsteiner University of Health Sciences, Department of Anatomy and Biomechanics, Dr.-Karl-Dorrek-Strasse 30, 3500 Krems an der Donau, Austria
| | - Gernot Kronreif
- Austrian Center for Medical Innovation and Technology (ACMIT Gmbh), Viktor-Kaplan-Strasse 2/A, 2700 Wiener Neustadt, Austria
| | - Andrea Lorenz
- Austrian Center for Medical Innovation and Technology (ACMIT Gmbh), Viktor-Kaplan-Strasse 2/A, 2700 Wiener Neustadt, Austria
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228
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Fu B, Shen J, Chen Y, Wu Y, Zhang H, Liu H, Huang W. Narrative review of gene modification: applications in three-dimensional (3D) bioprinting. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1502. [PMID: 34805364 PMCID: PMC8573440 DOI: 10.21037/atm-21-2854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 08/23/2021] [Indexed: 11/22/2022]
Abstract
Objective This article focused on the application scenarios of three-dimensional (3D) bioprinting and gene-editing technology in various medical fields, including gene therapy, tissue engineering, tumor microenvironment simulation, tumor model construction, cancer regulation and expression, osteogenesis, and skin and vascular regeneration, and summarizing its development prospects and shortcomings. Background 3D bioprinting is a process based on additive manufacturing that uses biological materials as the microenvironment living cells. The scaffolds and carriers manufactured by 3D bioprinting technology provide a safe, efficient, and economical platform for genes, cells, and biomolecules. Gene modification refers to replacing, splicing, silencing, editing, controlling or inactivating genes and delivering new genes. The combination of this technology that changes cell function or cell fate or corrects endogenous mutations and 3D bioprinting technology has been widely used in various medical field. Methods We conducted a literature search for papers published up to March 2021 on the gene modification combined with 3D bioprinting in various medical fields via PubMed, Web of Science, China National Knowledge Infrastructure (CNKI). The following medical subject heading terms were included for a MEDLINE search: “3D printing/gene editing”, “3D printing/genetic modification”, “3D printing/seed cell”, “bioprinting/gene editing”, “bioprinting/genetic modification”, “bioprinting/seed cell”, “scaffold/gene editing”, “scaffold/genetic modification”, “scaffold/seed cell”, “gene/scaffold”, “gene/bioprinting”, “gene/3D printing”. Quantitative and qualitative data was extracted through interpretation of each article. Conclusions We have reviewed the application scenarios of 3D bioprinting and gene-editing technology in various medical fields, it provides an efficient and accurate delivery system for personalized tumor therapy, enhancing the targeting effect while maintaining the integrity of the fabricated structure. It exhibits significant application potential in developing tumor drugs. In addition, scaffolds obtained via 3D bioprinting provide gene therapy applications for skin and bone healing and repair and inducing stem cell differentiation. It also considers the future development direction in this field, such as the emergence and development of gene printing, 4D printing. The combination of nanotechnology and gene printing may provide a new way for future disease research and treatment.
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Affiliation(s)
- Bowen Fu
- Department of Orthopedics, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,School of Basic Medical Sciences, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Guangdong Provincial Medical 3D Printing Application Transformation Engineering Technology Research Center, Guangzhou, China
| | - Jianlin Shen
- Department of Orthopedics, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,Department of Orthopaedics, Affiliated Hospital, Putian University, Putian, China
| | - Yu Chen
- Central Laboratory, Affiliated Hospital of Putian University, Putian, China
| | - Yanjiao Wu
- Department of Orthopedics, Shunde Hospital of Southern Medical University Guangzhou, China
| | - Heshi Zhang
- Department of Vessel & Breast & Thyroid Surgery, Hospital (TCM) Affiliated to Southwest Medical University, Luzhou, China
| | - Huan Liu
- National Traditional Chinese Medicine Clinical Research Base, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou, China
| | - Wenhua Huang
- Department of Orthopedics, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical University, Guangzhou, China.,School of Basic Medical Sciences, Southern Medical University, Guangdong Provincial Key Laboratory of Medical Biomechanics, Guangdong Provincial Medical 3D Printing Application Transformation Engineering Technology Research Center, Guangzhou, China
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229
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He XY, Yu HM, Lin S, Li YZ. Advances in the application of mesenchymal stem cells, exosomes, biomimetic materials, and 3D printing in osteoporosis treatment. Cell Mol Biol Lett 2021; 26:47. [PMID: 34775969 PMCID: PMC8591870 DOI: 10.1186/s11658-021-00291-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 11/02/2021] [Indexed: 01/01/2023] Open
Abstract
Owing to an increase in the aging population, osteoporosis has become a severe public health concern, with a high prevalence among the elderly and postmenopausal adults. Osteoporosis-related fracture is a major cause of morbidity and mortality in elderly and postmenopausal adults, posing a considerable socioeconomic burden. However, existing treatments can only slow down the process of osteoporosis, reduce the risk of fractures, and repair fractures locally. Therefore, emerging methods for treating osteoporosis, such as mesenchymal stem cell transplantation, exosome-driving drug delivery systems, biomimetic materials, and 3D printing technology, have received increasing research attention, with significant progress. Mesenchymal stem cells (MSCs) are pluripotent stem cells that can differentiate into different types of functional cells. Exosomes play a key role in regulating cell microenvironments through paracrine mechanisms. Bionic materials and 3D printed scaffolds are beneficial for the reconstruction and repair of osteoporotic bones and osteoporosis-related fractures. Stem cells, exosomes, and biomimetic materials represent emerging technologies for osteoporosis treatment. This review summarizes the latest developments in these three aspects.
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Affiliation(s)
- Xiao-Yu He
- Department of Orthopaedics, The Second Affiliated Hospital of Fujian Medical University, No. 34 North Zhongshan Road, Quanzhou, 362000, Fujian Province, China
| | - Hai-Ming Yu
- Department of Orthopaedics, The Second Affiliated Hospital of Fujian Medical University, No. 34 North Zhongshan Road, Quanzhou, 362000, Fujian Province, China.
| | - Shu Lin
- Centre of Neurological and Metabolic Research, The Second Affiliated Hospital of Fujian Medical University, No. 34 North Zhongshan Road, Quanzhou, 362000, Fujian Province, China. .,Diabetes and Metabolism Division, Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, Sydney, NSW, 2010, Australia.
| | - Yi-Zhong Li
- Department of Orthopaedics, The Second Affiliated Hospital of Fujian Medical University, No. 34 North Zhongshan Road, Quanzhou, 362000, Fujian Province, China
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230
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Xu W, Jambhulkar S, Ravichandran D, Zhu Y, Kakarla M, Nian Q, Azeredo B, Chen X, Jin K, Vernon B, Lott DG, Cornella JL, Shefi O, Miquelard-Garnier G, Yang Y, Song K. 3D Printing-Enabled Nanoparticle Alignment: A Review of Mechanisms and Applications. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2021; 17:e2100817. [PMID: 34176201 DOI: 10.1002/smll.202100817] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/05/2021] [Indexed: 05/12/2023]
Abstract
3D printing (additive manufacturing (AM)) has enormous potential for rapid tooling and mass production due to its design flexibility and significant reduction of the timeline from design to manufacturing. The current state-of-the-art in 3D printing focuses on material manufacturability and engineering applications. However, there still exists the bottleneck of low printing resolution and processing rates, especially when nanomaterials need tailorable orders at different scales. An interesting phenomenon is the preferential alignment of nanoparticles that enhance material properties. Therefore, this review emphasizes the landscape of nanoparticle alignment in the context of 3D printing. Herein, a brief overview of 3D printing is provided, followed by a comprehensive summary of the 3D printing-enabled nanoparticle alignment in well-established and in-house customized 3D printing mechanisms that can lead to selective deposition and preferential orientation of nanoparticles. Subsequently, it is listed that typical applications that utilized the properties of ordered nanoparticles (e.g., structural composites, heat conductors, chemo-resistive sensors, engineered surfaces, tissue scaffolds, and actuators based on structural and functional property improvement). This review's emphasis is on the particle alignment methodology and the performance of composites incorporating aligned nanoparticles. In the end, significant limitations of current 3D printing techniques are identified together with future perspectives.
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Affiliation(s)
- Weiheng Xu
- The Polytechnic School (TPS), Ira A. Fulton Schools for Engineering, Arizona State University, 6075 S. Innovation Way West, Mesa, AZ, 85212, USA
| | - Sayli Jambhulkar
- The Polytechnic School (TPS), Ira A. Fulton Schools for Engineering, Arizona State University, 6075 S. Innovation Way West, Mesa, AZ, 85212, USA
| | - Dharneedar Ravichandran
- The Polytechnic School (TPS), Ira A. Fulton Schools for Engineering, Arizona State University, 6075 S. Innovation Way West, Mesa, AZ, 85212, USA
| | - Yuxiang Zhu
- The Polytechnic School (TPS), Ira A. Fulton Schools for Engineering, Arizona State University, 6075 S. Innovation Way West, Mesa, AZ, 85212, USA
| | - Mounika Kakarla
- Department of Materials Science and Engineering, Ira A. Fulton Schools for Engineering, Arizona State University, Tempe, 501 E. Tyler Mall, Tempe, AZ, 85287, USA
| | - Qiong Nian
- Department of Mechanical Engineering, and Multi-Scale Manufacturing Material Processing Lab (MMMPL), Ira A. Fulton Schools for Engineering, Arizona State University, 501 E. Tyler Mall, Tempe, AZ, 85287, USA
| | - Bruno Azeredo
- The Polytechnic School (TPS), Ira A. Fulton Schools for Engineering, Arizona State University, 6075 S. Innovation Way West, Mesa, AZ, 85212, USA
| | - Xiangfan Chen
- Advanced Manufacturing and Functional Devices (AMFD) Laboratory, Ira A. Fulton Schools for Engineering, Arizona State University, 6075 Innovation Way W., Mesa, AZ, 85212, USA
| | - Kailong Jin
- Department of Chemical Engineering, School for Engineering Matter, Transport and Energy (SEMTE), and Biodesign Institute Center for Sustainable Macromolecular Materials and Manufacturing (BCSM3), Arizona State University, 501 E. Tyler St., Tempe, AZ, 85287, USA
| | - Brent Vernon
- Department of Biomedical Engineering, Biomaterials Lab, School of Biological and Health Systems Engineering, Arizona State University, 427 E Tyler Mall, Tempe, AZ, 85281, USA
| | - David G Lott
- Department Otolaryngology, Division of Laryngology, College of Medicine, and Mayo Clinic Arizona Center for Regenerative Medicine, 13400 E Shea Blvd, Scottsdale, AZ, 85259, USA
| | - Jeffrey L Cornella
- Professor of Obstetrics and Gynecology, Mayo Clinic College of Medicine, Division of Gynecologic Surgery, Mayo Clinic, 13400 E Shea Blvd, Scottsdale, AZ, 85259, USA
| | - Orit Shefi
- Department of Engineering, Neuro-Engineering and Regeneration Laboratory, Bar Ilan Institute of Nanotechnologies and Advanced Materials, Bar-Ilan University, Building 1105, Ramat Gan, 52900, Israel
| | - Guillaume Miquelard-Garnier
- laboratoire PIMM, UMR 8006, Arts et Métiers Institute of Technology, CNRS, CNAM, Hesam University, 151 boulevard de l'Hôpital, Paris, 75013, France
| | - Yang Yang
- Additive Manufacturing & Advanced Materials Lab, Department of Mechanical Engineering, San Diego State University, 5500 Campanile Drive, San Diego, CA, 92182-1323, USA
| | - Kenan Song
- Department of Manufacturing Engineering, Advanced Materials Advanced Manufacturing Laboratory (AMAML), Ira A. Fulton Schools for Engineering, Arizona State University, 6075 Innovation Way W., Mesa, AZ, 85212, USA
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Dobrzyńska E, Kondej D, Kowalska J, Szewczyńska M. State of the art in additive manufacturing and its possible chemical and particle hazards-review. INDOOR AIR 2021; 31:1733-1758. [PMID: 34081372 PMCID: PMC8596642 DOI: 10.1111/ina.12853] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/29/2021] [Accepted: 04/21/2021] [Indexed: 05/27/2023]
Abstract
Additive manufacturing, enabling rapid prototyping and so-called on-demand production, has become a common method of creating parts or whole devices. On a 3D printer, real objects are produced layer by layer, thus creating extraordinary possibilities as to the number of applications for this type of devices. The opportunities offered by this technique seem to be pushing new boundaries when it comes to both the use of 3D printing in practice and new materials from which the 3D objects can be printed. However, the question arises whether, at the same time, this solution is safe enough to be used without limitations, wherever and by everyone. According to the scientific reports, three-dimensional printing can pose a threat to the user, not only in terms of physical or mechanical hazards, but also through the potential emissions of chemical substances and fine particles. Thus, the presented publication collects information on the additive manufacturing, different techniques, and ways of printing with application of diverse raw materials. It presents an overview of the last 5 years' publications focusing on 3D printing, especially regarding the potential chemical and particle emission resulting from the use of such printers in both the working environment and private spaces.
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Affiliation(s)
- Elżbieta Dobrzyńska
- Central Institute for Labour Protection—National Research InstituteWarsawPoland
| | - Dorota Kondej
- Central Institute for Labour Protection—National Research InstituteWarsawPoland
| | - Joanna Kowalska
- Central Institute for Labour Protection—National Research InstituteWarsawPoland
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Raymond Y, Bonany M, Lehmann C, Thorel E, Benítez R, Franch J, Espanol M, Solé-Martí X, Manzanares MC, Canal C, Ginebra MP. Hydrothermal processing of 3D-printed calcium phosphate scaffolds enhances bone formation in vivo: a comparison with biomimetic treatment. Acta Biomater 2021; 135:671-688. [PMID: 34496283 DOI: 10.1016/j.actbio.2021.09.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 08/02/2021] [Accepted: 09/01/2021] [Indexed: 10/20/2022]
Abstract
Hydrothermal (H) processes accelerate the hydrolysis reaction of α-tricalcium phosphate (α-TCP) compared to the long-established biomimetic (B) treatments. They are of special interest for patient-specific 3D-printed bone graft substitutes, where the manufacturing time represents a critical constraint. Altering the reaction conditions has implications for the physicochemical properties of the reaction product. However, the impact of the changes produced by the hydrothermal reaction on the in vivo performance was hitherto unknown. The present study compares the bone regeneration potential of 3D-printed α-TCP scaffolds hardened using these two treatments in rabbit condyle monocortical defects. Although both consolidation processes resulted in biocompatible scaffolds with osseointegrative and osteoconductive properties, the amount of newly formed bone increased by one third in the hydrothermal vs the biomimetic samples. B and H scaffolds consisted mostly of high specific surface area calcium-deficient hydroxyapatite (38 and 27 m2 g-1, respectively), with H samples containing also 10 wt.% β-tricalcium phosphate (β-TCP). The shrinkage produced during the consolidation process was shown to be very small in both cases, below 3%, and smaller for H than for B samples. The differences in the in vivo performance were mainly attributed to the distinct crystallisation nanostructures, which proved to have a major impact on permeability and protein adsorption capacity, using BSA as a model protein, with B samples being highly impermeable. Given the crucial role that soluble proteins play in osteogenesis, this is proposed to be a relevant factor behind the distinct in vivo performances observed for the two materials. STATEMENT OF SIGNIFICANCE: The possibility to accelerate the consolidation of self-setting calcium phosphate inks through hydrothermal treatments has aroused great interest due to the associated advantages for the development of 3D-printed personalised bone scaffolds. Understanding the implications of this approach on the in vivo performance of the scaffolds is of paramount importance. This study compares, for the first time, this treatment to the long-established biomimetic setting strategy in terms of osteogenic potential in vivo in a rabbit model, and relates the results obtained to the physicochemical properties of the 3D-printed scaffolds (composition, crystallinity, nanostructure, nanoporosity) and their interaction with soluble proteins.
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Diagnostic Efficacy and Tolerability of Molded Plastic Nasopharyngeal Swab (FinSwab) Compared to Flocked Nylon Swab in Detection of SARS-CoV-2 and Other Respiratory Viruses. Microbiol Spectr 2021; 9:e0073621. [PMID: 34668741 PMCID: PMC8528101 DOI: 10.1128/spectrum.00736-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
The supply of testing equipment is vital in controlling the spread of SARS-CoV-2. We compared the diagnostic efficacy and tolerability of molded plastic (FinSwab; Valukumpu, Finland) versus flocked nylon (FLOQSwab; Copan, Italy) nasopharyngeal swabs in a clinical setting. Adults (n = 112) with suspected symptomatic COVID-19 infection underwent nasopharyngeal sampling with FinSwab and FLOQSwab from the same nostril at a drive-in coronavirus testing station. In a subset of 36 patients the samples were collected in a randomized order to evaluate the discomfort associated with sampling. SARS-CoV-2 and 16 other respiratory viruses, as well as human β-actin mRNA were analyzed by using reverse transcriptase PCR (RT-PCR) assays. Among the 112 patients (mean age, 38 [standard deviation (SD), 14] years) β-actin mRNA was found in all samples. There was no difference in the β-actin mRNA cycle threshold (CT) values between FinSwab (mean, 22.3; SD, 3.61) and FLOQSwab (mean, 22.1; SD, 3.50; P = 0.46) swabs. There were 31 virus-positive cases (26 rhinovirus, 4 SARS-CoV-2, and 1 coronavirus-OC43), 24 of which were positive in both swabs; 3 rhinovirus positives were only found in the FinSwab, and similarly 4 rhinovirus positives were only found in the FLOQSwab. Rhinovirus CT values were similar between swab types. Of the 36 patients, 22 (61%) tolerated the sampling with the FinSwab better than with the FLOQSwab (P = 0.065). The molded plastic nasopharyngeal swab (FinSwab) was comparable to the standard flocked swab in terms of efficacy for respiratory virus detection and tolerability of sampling. IMPORTANCE We demonstrate that a molded plastic swab is a valid alternative to conventional brush-like swabs in collection of a nasopharyngeal sample for virus diagnostics.
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234
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Lv S. Research fronts of Chemical Biology. PURE APPL CHEM 2021. [DOI: 10.1515/pac-2020-1004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Over the past decades, researchers have witnessed substantially increasing and ever-growing interests and efforts in Chemical Biology studies, thanks to the development of genome and epi-genome sequencing (revealing potential drug targets), synthetic chemistry (producing new medicines), bioorthogonal chemistry (chemistry in living systems) and high-throughput screening technologies (in vitro cell systems, protein binding assays and phenotypic assays). This report presents literature search results for current research in Chemical Biology, to explore basic principles, summarize recent advances, identify key challenges, and provide suggestions for future research (with a focus on Chemical Biology in the context of human health and diseases). Chemical Biology research can positively contribute to delivering a better understanding of the molecular and cellular mechanisms that accompany pathology underlying diseases, as well as developing improved methods for diagnosis, drug discovery, and therapeutic delivery. While much progress has been made, as shown in this report, there are still further needs and opportunities. For instance, pressing challenges still exist in selecting appropriate targets in biological systems and adopting more rational design strategies for the development of innovative and sustainable diagnostic technologies and medical treatments. Therefore, more than ever, researchers from different disciplines need to collaborate to address the challenges in Chemical Biology.
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Affiliation(s)
- Shanshan Lv
- State Key Laboratory of Organic-Inorganic Composite Materials , Beijing University of Chemical Technology , Beijing , , China
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235
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Alfouzan AF. The role of simulator and digital technologies in head and neck reconstruction. Niger J Clin Pract 2021; 24:1415-1422. [PMID: 34657004 DOI: 10.4103/njcp.njcp_566_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
This review summarizes the development of digital technology in the field of head and neck surgeries. Advances in digital technology assist surgeons during preoperative planning, where they can simulate their surgeries with improvement in the resulting accuracy of the surgery. In addition to digital technologies having many applications in the surgical field, they can be used in medical devices, surgical and educational models, and tissue engineering.
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Affiliation(s)
- A F Alfouzan
- Department of Prosthetic Dental Science, College of Dentistry, King Saud University, Riyadh, Saudi Arabia
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Tallarico M, Czajkowska M, Cicciù M, Giardina F, Minciarelli A, Zadrożny Ł, Park CJ, Meloni SM. Accuracy of surgical templates with and without metallic sleeves in case of partial arch restorations: A systematic review. J Dent 2021; 115:103852. [PMID: 34656660 DOI: 10.1016/j.jdent.2021.103852] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 08/25/2021] [Accepted: 10/06/2021] [Indexed: 10/20/2022] Open
Abstract
INTRODUCTION The aim of the present systematic review was to evaluate whether there were any differences in the three-dimensional accuracy and the implant survival rate of implants placed using computer-assisted planning and surgical templates with or without metallic sleeves. SOURCES This systematic review was written according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines and registered to the PROSPERO (International prospective register of systematic reviews) database. STUDY SELECTION PICOS (population, intervention, control, outcomes, and studies) question was assessed, too. Search strategy encompassed the online (MedLine) literature from 1990 up to December 2020 published in English, and evaluating the accuracy of surgical templates with and without metallic sleeves in partial or complete patients. Only in vivo, randomized controlled trial and observational studies were included. Quality assessment of selected full text articles was performed according to the CONSORT (CONsolidated Standards of Reporting Trials) and STROBE (Strengthening the Reporting of Observational studies in Epidemiology) statement guidelines, respectively. For data analysis, the three-dimensional accuracy and the overall implant survival rate was calculated and compared between implants placed using surgical templates with or without metallic sleeves. DATA A total of 12 articles fulfilled the inclusion/exclusion criteria. Data from 264 patients with 614 implants were subjected to quality assessment (templates with metallic sleeves: 279 implants and 136 patients; templates without metallic sleeves: 335 implants and 128 patients). In all the three deviation parameters (angular, vertical, and horizontal), the differences in average accuracy were noticed (angular 2.33° ± 2.01° versus 3.09° ± 1.65°, vertical: 0.62 ± 0.36 [mm] versus 0.95 ± 0.42 [mm]; and horizontal: 0.62 ± 0.41 [mm] and 1.11 ± 0.57 [mm]. No differences was found regarding overall implant survival rate (0.4891). CONCLUSIONS With the limitations of the present study, the surgical templates without metallic sleeves demonstrated high level of accuracy in all the three-dimensional measurements, when used to rehabilitate partially edentulous patients. Further randomized controlled trials, reporting according to the CONSORT guidelines are needed to confirm that the differences in accuracy depended on the type of used templates.
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Affiliation(s)
- Marco Tallarico
- School of Dentistry, University of Sassari, 07100 Sassari, Italy.
| | - Marta Czajkowska
- Department of Laryngology, Medical University of Silesia, Katowice 40-027, Poland.
| | - Marco Cicciù
- Department of Biomedical and Dental Sciences Morphological and Functional Images, School of Dentistry, University of Messina, 98122 Messina, Italy.
| | | | | | - Łukasz Zadrożny
- Department of Dental Propaedeutics and Prophylaxis, Medical University of Warsaw, Warsaw 02-006, Poland.
| | - Chang-Joo Park
- Division of Oral and Maxillofacial Surgery, Department of Dentistry, College of Medicine, Hanyang University, Seoul 04763, Korea; Osstem R&D Center, Seoul 07789, Korea.
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Three-dimensional printing to plan intracardiac operations. JTCVS Tech 2021; 9:101-108. [PMID: 34647075 PMCID: PMC8500990 DOI: 10.1016/j.xjtc.2021.02.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 02/11/2021] [Indexed: 11/24/2022] Open
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238
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Nica DF, Gabor AG, Duma VF, Tudericiu VG, Tudor A, Sinescu C. Sinus Lift and Implant Insertion on 3D-Printed Polymeric Maxillary Models: Ex Vivo Training for In Vivo Surgical Procedures. J Clin Med 2021; 10:jcm10204718. [PMID: 34682841 PMCID: PMC8538196 DOI: 10.3390/jcm10204718] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 12/14/2022] Open
Abstract
Background and Objectives: The aim of this study is to demonstrate the increased efficiency achieved by dental practitioners when carrying out an ex vivo training process on 3D-printed maxillaries before performing in vivo surgery. Materials and Methods: This developed ex vivo procedure comprises the following phases: (i) scanning the area of interest for surgery; (ii) obtaining a 3D virtual model of this area using Cone Beam Computed Tomography (CBCT); (iii) obtaining a 3D-printed model (based on the virtual one), on which (iv) the dental practitioner simulates/rehearses ex vivo (most of) the surgery protocol; (v) assess with a new CBCT the 3D model after simulation. The technical steps of sinus augmentation and implant insertion could be performed on the corresponding 3D-printed hemi-maxillaries prior to the real in vivo surgery. Two study groups were considered, with forty patients divided as follows: Group 1 comprises twenty patients on which the developed simulation and rehearsal procedure was applied; Group 2 is a control one which comprises twenty patients on which similar surgery was performed without this procedure (considered in order to compare operative times without and with rehearsals). Results: Following the ex vivo training/rehearsal, an optimal surgery protocol was developed for each considered case. The results of the surgery on patients were compared with the results obtained after rehearsals on 3D-printed models. The performed quantitative assessment proved that, using the proposed training procedure, the results of the in vivo surgery are not significantly different (p = 0.089) with regard to the ex vivo simulation for both the mezio-distal position of the implant and the distance from the ridge margin to sinus window. On the contrary, the operative time of Group 1 was reduced significantly (p = 0.001), with an average of 20% with regard to in vivo procedures performed without rehearsals (on the control Group 2). Conclusions: The study demonstrated that the use of 3D-printed models can be beneficial to dental surgeon practitioners, as well as to students who must be trained before performing clinical treatments.
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Affiliation(s)
- Diana Florina Nica
- School of Dental Medicine, “Victor Babes” University of Medicine and Pharmacy of Timisoara, 2A Eftimie Murgu Place, 300070 Timisoara, Romania;
| | - Alin Gabriel Gabor
- Research Center in Dental Medicine Using Conventional and Alternative Technologies, School of Dental Medicine, “Victor Babes” University of Medicine and Pharmacy of Timisoara, 9 Revolutiei 1989 Ave., 300070 Timisoara, Romania; (A.G.G.); (A.T.); (C.S.)
| | - Virgil-Florin Duma
- 3OM Optomechatronics Group, Faculty of Engineering, “Aurel Vlaicu” University of Arad, 2 Elena Dragoi, 310177 Arad, Romania
- Doctoral School, Polytechnic University of Timisoara, 1 Mihai Viteazu Ave., 300222 Timisoara, Romania
- Correspondence: ; Tel.: +40-751-511451
| | | | - Anca Tudor
- Research Center in Dental Medicine Using Conventional and Alternative Technologies, School of Dental Medicine, “Victor Babes” University of Medicine and Pharmacy of Timisoara, 9 Revolutiei 1989 Ave., 300070 Timisoara, Romania; (A.G.G.); (A.T.); (C.S.)
| | - Cosmin Sinescu
- Research Center in Dental Medicine Using Conventional and Alternative Technologies, School of Dental Medicine, “Victor Babes” University of Medicine and Pharmacy of Timisoara, 9 Revolutiei 1989 Ave., 300070 Timisoara, Romania; (A.G.G.); (A.T.); (C.S.)
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Nold J, Metzger MC, Schwarz S, Wesemann C, Wemken G, Pieralli S, Kernen F, Weingart J, Schirmeister CG, Schumann S, Schlager S, Spies BC. Air seal performance of personalized and statistically shaped 3D-printed face masks compared with market-available surgical and FFP2 masks. Sci Rep 2021; 11:19347. [PMID: 34588584 PMCID: PMC8481495 DOI: 10.1038/s41598-021-98963-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Accepted: 08/23/2021] [Indexed: 11/09/2022] Open
Abstract
The ongoing COVID-19 pandemic has revealed alarming shortages of personal protective equipment for frontline healthcare professionals and the general public. Therefore, a 3D-printable mask frame was developed, and its air seal performance was evaluated and compared. Personalized masks (PM) based on individual face scans (n = 8) and a statistically shaped mask (SSM) based on a standardized facial soft tissue shape computed from 190 face scans were designed. Subsequently, the masks were additively manufactured, and in a second step, the PM and SSM were compared to surgical masks (SM) and FFP2 masks (FFP2) in terms of air seal performance. 3D-printed face models allowed for air leakage evaluation by measuring the pressure inside the mask in sealed and unsealed conditions during a breathing simulation. The PM demonstrated the lowest leak flow (p < 0.01) of inspired or expired unfiltered air of approximately 10.4 ± 16.4%, whereas the SM showed the highest (p < 0.01) leakage with 84.9 ± 7.7%. The FFP2 and SSM had similar values of 34.9 ± 18.5% leakage (p > 0.68). The developed framework allows for the time- and resource-efficient, on-demand, and in-house production of masks. For the best seal performance, an individually personalized mask design might be recommended.
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Affiliation(s)
- Julian Nold
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Marc C Metzger
- Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Steffen Schwarz
- Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Christian Wesemann
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Gregor Wemken
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Stefano Pieralli
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany.,Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Florian Kernen
- Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Julia Weingart
- Department of Oral and Maxillofacial Surgery, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Carl G Schirmeister
- Institute for Macromolecular Chemistry, Freiburg Materials Research Center, University of Freiburg, Stefan-Meier-Str. 21, 79104, Freiburg, Germany.,Basell Sales & Marketing B.V., LyondellBasell Industries, Industriepark Höchst, 65926, Frankfurt am Main, Germany
| | - Stefan Schumann
- Department of Anesthesiology and Critical Care, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - Stefan Schlager
- Department of Biological Anthropology, Medical Center, University of Freiburg, Hebelstraße 29, 79106, Freiburg, Germany
| | - Benedikt C Spies
- Department of Prosthetic Dentistry, Center for Dental Medicine, Faculty of Medicine, Medical Center, University of Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany.
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240
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Meesters AML, Trouwborst NM, de Vries JPPM, Kraeima J, Witjes MJH, Doornberg JN, Reininga IHF, IJpma FFA, ten Duis K. Does 3D-Assisted Acetabular Fracture Surgery Improve Surgical Outcome and Physical Functioning?-A Systematic Review. J Pers Med 2021; 11:966. [PMID: 34683107 PMCID: PMC8541524 DOI: 10.3390/jpm11100966] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/22/2021] [Accepted: 09/23/2021] [Indexed: 12/16/2022] Open
Abstract
Three-dimensional technology is increasingly being used in acetabular fracture treatment. No systematic reviews are available about the added clinical value of 3D-assisted acetabular fracture surgery compared to conventional surgery. Therefore, this study aimed to investigate whether 3D-assisted acetabular fracture surgery compared to conventional surgery improves surgical outcomes in terms of operation time, intraoperative blood loss, intraoperative fluoroscopy usage, complications, and postoperative fracture reduction, and whether it improves physical functioning. Pubmed and Embase databases were searched for articles on 3D technologies in acetabular fracture surgery, published between 2010 and February 2021. The McMaster critical review form was used to assess the methodological quality. Differences between 3D-assisted and conventional surgery were evaluated using the weighted mean and odds ratios. Nineteen studies were included. Three-dimensional-assisted surgery resulted in significantly shorter operation times (162.5 ± 79.0 versus 296.4 ± 56.0 min), less blood loss (697.9 ± 235.7 mL versus 1097.2 ± 415.5 mL), and less fluoroscopy usage (9.3 ± 5.9 versus 22.5 ± 20.4 times). The odds ratios of complications and fracture reduction were 0.5 and 0.4 for functional outcome in favour of 3D-assisted surgery, respectively. Three-dimensional-assisted surgery reduces operation time, intraoperative blood loss, fluoroscopy usage, and complications. Evidence for the improvement of fracture reduction and functional outcomes is limited.
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Affiliation(s)
- Anne M. L. Meesters
- Department of Trauma Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands; (N.M.T.); (I.H.F.R.); (F.F.A.I.); (K.t.D.)
| | - Neeltje M. Trouwborst
- Department of Trauma Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands; (N.M.T.); (I.H.F.R.); (F.F.A.I.); (K.t.D.)
| | - Jean-Paul P. M. de Vries
- Department of Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands;
| | - Joep Kraeima
- 3D Lab, Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands; (J.K.); (M.J.H.W.)
| | - Max J. H. Witjes
- 3D Lab, Department of Oral and Maxillofacial Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands; (J.K.); (M.J.H.W.)
| | - Job N. Doornberg
- Department of Orthopaedic Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands;
| | - Inge H. F. Reininga
- Department of Trauma Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands; (N.M.T.); (I.H.F.R.); (F.F.A.I.); (K.t.D.)
| | - Frank F. A. IJpma
- Department of Trauma Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands; (N.M.T.); (I.H.F.R.); (F.F.A.I.); (K.t.D.)
| | - Kaj ten Duis
- Department of Trauma Surgery, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands; (N.M.T.); (I.H.F.R.); (F.F.A.I.); (K.t.D.)
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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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242
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Tooulias A, Tsoulfas G, Papadopoulos V, Alexiou M, Karolos IA, Pikridas C, Tsioukas V. Assisting Difficult Liver Operations Using 3D Printed Models. LIVERS 2021; 1:138-146. [DOI: 10.3390/livers1030013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/26/2024] Open
Abstract
Liver cancer is estimated to be the fifth most common in the world, while it is also considered the third leading cause of cancer death. In cases of primary liver cancer, surgery in combination with chemotherapy and radiotherapy can lead to a complete cure or significantly increase the patient’s life expectancy. Since the liver is an organ that performs several critical functions in the human body, the precise estimation of the disease (position and size of tumors and its vicinity to vessels) plays a vital role in a successful operation. In some cases, the removal of the tumor may be successful, but the percentage of the hepatic remnant may not be sufficient to sustain life. Therefore, accurate imaging of the tumor of the liver and proper planning of a difficult surgery to remove tumor(s) from a patient’s liver can be a lifesaver and lead to a complete cure of the disease. The aim of the present study is the initial accurate representation of the liver (parenchyma, tumors, vessels) as a digital three-dimensional (3D) model using advanced image processing and machine learning techniques and its 3D printing in 1:1 scale representing the full size of the liver with the tumor(s). A model of this type has been used at our University surgical department to plan complex hepatobiliary surgeries, provide more accurate information to the patients and their families, as well as improve the training of medical students and resident surgeons and fellows.
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Affiliation(s)
- Andreas Tooulias
- 1st Surgical Department, School of Medicine, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece
| | - Georgios Tsoulfas
- Department of Transplantation Surgery, School of Medicine, Aristotle University of Thessaloniki, 54642 Thessaloniki, Greece
| | - Vasileios Papadopoulos
- 1st Surgical Department, School of Medicine, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece
| | - Maria Alexiou
- 1st Surgical Department, School of Medicine, Aristotle University of Thessaloniki, 56403 Thessaloniki, Greece
| | - Ion-Anastasios Karolos
- Department of Geodesy and Surveying, School of Rural and Surveying Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Christos Pikridas
- Department of Geodesy and Surveying, School of Rural and Surveying Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Vassilios Tsioukas
- Department of Geodesy and Surveying, School of Rural and Surveying Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
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Cernica D, Benedek I, Polexa S, Tolescu C, Benedek T. 3D Printing-A Cutting Edge Technology for Treating Post-Infarction Patients. Life (Basel) 2021; 11:910. [PMID: 34575059 PMCID: PMC8468787 DOI: 10.3390/life11090910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/25/2021] [Accepted: 08/28/2021] [Indexed: 02/06/2023] Open
Abstract
The increasing complexity of cardiovascular interventions requires advanced peri-procedural imaging and tailored treatment. Three-dimensional printing technology represents one of the most significant advances in the field of cardiac imaging, interventional cardiology or cardiovascular surgery. Patient-specific models may provide substantial information on intervention planning in complex cardiovascular diseases, and volumetric medical imaging from CT or MRI can be translated into patient-specific 3D models using advanced post-processing applications. 3D printing and additive manufacturing have a great variety of clinical applications targeting anatomy, implants and devices, assisting optimal interventional treatment and post-interventional evaluation. Although the 3D printing technology still lacks scientific evidence, its benefits have been shown in structural heart diseases as well as for treatment of complex arrhythmias and corrective surgery interventions. Recent development has enabled transformation of conventional 3D printing into complex 3D functional living tissues contributing to regenerative medicine through engineered bionic materials such hydrogels, cell suspensions or matrix components. This review aims to present the most recent clinical applications of 3D printing in cardiovascular medicine, highlighting also the potential for future development of this revolutionary technology in the medical field.
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Affiliation(s)
- Daniel Cernica
- Center of Advanced Research in Multimodal Cardiovascular Imaging, Cardio Med Medical Center, 540124 Targu Mures, Romania; (D.C.); (I.B.); (C.T.); (T.B.)
- Cardiology Department, University of Medicine, Pharmacy, Sciences and Technologies “George Emil Palade”, 540142 Targu Mures, Romania
| | - Imre Benedek
- Center of Advanced Research in Multimodal Cardiovascular Imaging, Cardio Med Medical Center, 540124 Targu Mures, Romania; (D.C.); (I.B.); (C.T.); (T.B.)
- Cardiology Department, University of Medicine, Pharmacy, Sciences and Technologies “George Emil Palade”, 540142 Targu Mures, Romania
| | - Stefania Polexa
- Center of Advanced Research in Multimodal Cardiovascular Imaging, Cardio Med Medical Center, 540124 Targu Mures, Romania; (D.C.); (I.B.); (C.T.); (T.B.)
- Cardiology Department, University of Medicine, Pharmacy, Sciences and Technologies “George Emil Palade”, 540142 Targu Mures, Romania
| | - Cosmin Tolescu
- Center of Advanced Research in Multimodal Cardiovascular Imaging, Cardio Med Medical Center, 540124 Targu Mures, Romania; (D.C.); (I.B.); (C.T.); (T.B.)
- Cardiology Department, University of Medicine, Pharmacy, Sciences and Technologies “George Emil Palade”, 540142 Targu Mures, Romania
| | - Theodora Benedek
- Center of Advanced Research in Multimodal Cardiovascular Imaging, Cardio Med Medical Center, 540124 Targu Mures, Romania; (D.C.); (I.B.); (C.T.); (T.B.)
- Cardiology Department, University of Medicine, Pharmacy, Sciences and Technologies “George Emil Palade”, 540142 Targu Mures, Romania
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A Systematic Review and Meta-Analysis of 3D Printing Technology for the Treatment of Acetabular Fractures. BIOMED RESEARCH INTERNATIONAL 2021; 2021:5018791. [PMID: 34458367 PMCID: PMC8387177 DOI: 10.1155/2021/5018791] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 08/01/2021] [Accepted: 08/06/2021] [Indexed: 01/20/2023]
Abstract
Purpose Three-dimensional (3D) printing technology has been widely used in orthopedics surgery. However, its efficacy in acetabular fractures remains unclear. The aim of this systematic review and meta-analysis was to examine the effect of using 3D printing technology in the surgery for acetabular fractures. Methods The systematic review was performed following the PRISMA guidelines. Four major electronic databases were searched (inception to February 2021). Studies were screened using a priori criteria. Data from each study were extracted by two independent reviewers and organized using a standardized table. Data were pooled and presented in forest plots. Results Thirteen studies were included in the final analysis. Four were prospective randomized trials, and nine used a retrospective comparative design. The patients aged between 32.1 (SD 14.6) years and 51.9 (SD 18.9) years. Based on the pooled analyses, overall, 3D printing-assisted surgery decreased operation time by 38.8 minutes (95% CI: -54.9, -22.8), intraoperative blood loss by 259.7 ml (95% CI: -394.6, -124.9), instrumentation time by 34.1 minutes (95% CI: -49.0, -19.1). Traditional surgery was less likely to achieve good/excellent function of hip (RR, 0.53; 95% CI: 0.34, 0.82) and more likely to have complications than 3D printing-assisted surgery (RR, 1.19; 95% CI: 1.07, 1.33). Conclusions 3D printing technology demonstrated efficacy in the treatment of acetabular fractures. It may improve surgery-related and clinical outcomes. More prospective studies using a rigorous design (e.g., randomized trial with blinding) are warranted to confirm the long-term effects of 3D printing technology in orthopedics surgeries.
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Javan R, Schickel M, Zhao Y, Agbo T, Fleming C, Heidari P, Gholipour T, Shields DC, Koubeissi M. Using 3D-Printed Mesh-Like Brain Cortex with Deep Structures for Planning Intracranial EEG Electrode Placement. J Digit Imaging 2021; 33:324-333. [PMID: 31512018 DOI: 10.1007/s10278-019-00275-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Surgical evaluation of medically refractory epilepsy frequently necessitates implantation of multiple intracranial electrodes for the identification of the seizure focus. Knowledge of the individual brain's surface anatomy and deep structures is crucial for planning the electrode implantation. We present a novel method of 3D printing a brain that allows for the simulation of placement of all types of intracranial electrodes. We used a DICOM dataset of a T1-weighted 3D-FSPGR brain MRI from one subject. The segmentation tools of Materialise Mimics 21.0 were used to remove the osseous anatomy from brain parenchyma. Materialise 3-matic 13.0 was then utilized in order to transform the cortex of the segmented brain parenchyma into a mesh-like surface. Using 3-matic tools, the model was modified to incorporate deep brain structures and create an opening in the medial aspect. The final model was then 3D printed as a cerebral hemisphere with nylon material using selective laser sintering technology. The final model was light and durable and reflected accurate details of the surface anatomy and some deep structures. Additionally, standard surgical depth electrodes could be passed through the model to reach deep structures without damaging the model. This novel 3D-printed brain model provides a unique combination of visualizing both the surface anatomy and deep structures through the mesh-like surface while allowing repeated needle insertions. This relatively low-cost technique can be implemented for interdisciplinary preprocedural planning in patients requiring intracranial EEG monitoring and for any intervention that requires needle insertion into a solid organ with unique anatomy and internal targets.
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Affiliation(s)
- Ramin Javan
- Department of Radiology, George Washington University Hospital, 900 23rd St NW, Suite G2092, Washington, DC, 20037, USA. .,George Washington University School of Medicine and Health Sciences, Washington, DC, USA.
| | | | - Yuanlong Zhao
- George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Terry Agbo
- George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Cullen Fleming
- George Washington University School of Medicine and Health Sciences, Washington, DC, USA
| | - Parisa Heidari
- Department of Radiology, George Washington University Hospital, 900 23rd St NW, Suite G2092, Washington, DC, 20037, USA
| | - Taha Gholipour
- Department of Neurology, George Washington University Hospital, Washington, DC, USA
| | - Donald C Shields
- Department of Neurosurgery, George Washington University Hospital, Washington, DC, USA
| | - Mohamad Koubeissi
- Department of Neurology, George Washington University Hospital, Washington, DC, USA
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The advances of topology optimization techniques in orthopedic implants: A review. Med Biol Eng Comput 2021; 59:1673-1689. [PMID: 34363576 DOI: 10.1007/s11517-021-02361-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Accepted: 04/05/2021] [Indexed: 10/20/2022]
Abstract
Metal implants are widely used in the treatment of orthopedic diseases. However, owing to the mismatched elastic modulus of the bone and implants, stress shielding often occurs clinically which can result in failure of the implant or fractures around the implant. Topology optimization (TO) is a technique that can provide more efficient material distribution according to the objective function under the special load and boundary conditions. Several researchers have paid close attention to TO for optimal design of orthopedic implants. Thanks to the development of additive manufacturing (AM), the complex structure of the TO design can be fabricated. This article mainly focuses on the current stage of TO technique with respect to the global layout and hierarchical structure in orthopedic implants. In each aspect, diverse implants in different orthopedic fields related to TO design are discussed. The characteristics of implants, methods of TO, validation methods of the newly designed implants, and limitations of current research have been summarized. The review concludes with future challenges and directions for research. Wang TO design of global layout and local structure of implants in diverse fields of orthopedic.
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247
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McCallum S, Maresse S, Fearns P. Evaluating 3D-printed Bolus Compared to Conventional Bolus Types Used in External Beam Radiation Therapy. Curr Med Imaging 2021; 17:820-831. [PMID: 33530912 DOI: 10.2174/1573405617666210202114336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Revised: 12/05/2020] [Accepted: 12/08/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND When treating superficial tumors with external beam radiation therapy, bolus is often used. Bolus increases surface dose, reduces dose to underlying tissue, and improves dose homogeneity. INTRODUCTION The conventional bolus types used clinically in practice have some disadvantages. The use of Three-Dimensional (3D) printing has the potential to create more effective boluses. CT data is used for dosimetric calculations for these treatments and often to manufacture the customized 3D-printed bolus. PURPOSE The aim of this review is to evaluate the published studies that have compared 3D-printed bolus against conventional bolus types. METHODS AND RESULTS A systematic search of several databases and a further appraisal for relevance and eligibility resulted in the 14 articles used in this review. The 14 articles were analyzed based on their comparison of 3D-printed bolus and at least one conventional bolus type. CONCLUSION The findings of this review indicated that 3D-printed bolus has a number of advantages. Compared to conventional bolus types, 3D-printed bolus was found to have equivalent or improved dosimetric measures, positional accuracy, fit, and uniformity. 3D-printed bolus was also found to benefit workflow efficiency through both time and cost effectiveness. However, factors such as patient comfort and staff perspectives need to be further explored to support the use of 3Dprinted bolus in routine practice.
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Affiliation(s)
- Stephanie McCallum
- Medical Radiation Science, Faculty of Science and Engineering, Curtin University, Perth, Australia
| | - Sharon Maresse
- Medical Radiation Science, Faculty of Science and Engineering, Curtin University, Perth, Australia
| | - Peter Fearns
- Medical Radiation Science, Faculty of Science and Engineering, Curtin University, Perth, Australia
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248
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Vallatos A, Maguire JM, Pilavakis N, Cerniauskas G, Sturtivant A, Speakman AJ, Gourlay S, Inglis S, McCall G, Davie A, Boyd M, Tavares AAS, Doherty C, Roberts S, Aitken P, Mason M, Cummings S, Mullen A, Paterson G, Proudfoot M, Brady S, Kesterton S, Queen F, Fletcher S, Sherlock A, Dunn KE. Adaptive Manufacturing for Healthcare During the COVID-19 Emergency and Beyond. FRONTIERS IN MEDICAL TECHNOLOGY 2021; 3:702526. [PMID: 35047941 PMCID: PMC8757720 DOI: 10.3389/fmedt.2021.702526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/06/2021] [Indexed: 01/25/2023] Open
Abstract
During the COVID-19 pandemic, global health services have faced unprecedented demands. Many key workers in health and social care have experienced crippling shortages of personal protective equipment, and clinical engineers in hospitals have been severely stretched due to insufficient supplies of medical devices and equipment. Many engineers who normally work in other sectors have been redeployed to address the crisis, and they have rapidly improvised solutions to some of the challenges that emerged, using a combination of low-tech and cutting-edge methods. Much publicity has been given to efforts to design new ventilator systems and the production of 3D-printed face shields, but many other devices and systems have been developed or explored. This paper presents a description of efforts to reverse engineer or redesign critical parts, specifically a manifold for an anaesthesia station, a leak port, plasticware for COVID-19 testing, and a syringe pump lock box. The insights obtained from these projects were used to develop a product lifecycle management system based on Aras Innovator, which could with further work be deployed to facilitate future rapid response manufacturing of bespoke hardware for healthcare. The lessons learned could inform plans to exploit distributed manufacturing to secure back-up supply chains for future emergency situations. If applied generally, the concept of distributed manufacturing could give rise to "21st century cottage industries" or "nanofactories," where high-tech goods are produced locally in small batches.
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Affiliation(s)
- Antoine Vallatos
- Centre for Clinical Brain Sciences, Chancellor's Building, University of Edinburgh, Edinburgh, United Kingdom
| | - James M. Maguire
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
| | - Nikolas Pilavakis
- School of Informatics, University of Edinburgh, Edinburgh, United Kingdom
| | | | | | | | - Steve Gourlay
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
| | - Scott Inglis
- Department of Medical Physics, NHS Lothian, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Graham McCall
- AESSiS - Advanced Engineering Solutions, London, United Kingdom
| | - Andrew Davie
- Department of Medical Physics, NHS Lothian, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Mike Boyd
- uCreate Studio, Main Library, University of Edinburgh, George Square, Edinburgh, United Kingdom
| | - Adriana A. S. Tavares
- British Heart Foundation/University of Edinburgh Centre for Cardiovascular Science and Edinburgh Imaging, Queen's Medical Research Institute, University of Edinburgh, Edinburgh, United Kingdom
| | - Connor Doherty
- Department of Medical Physics, NHS Lothian, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Sharen Roberts
- Department of Medical Physics, NHS Lothian, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Paul Aitken
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
| | - Mark Mason
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
| | - Scott Cummings
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
| | - Andrew Mullen
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
| | - Gordon Paterson
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
| | - Matthew Proudfoot
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
| | - Sean Brady
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
| | - Steven Kesterton
- Department of Medical Physics, NHS Lothian, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom
| | - Fraser Queen
- Lomond Process Engineering, Glasgow, United Kingdom
| | | | - Andrew Sherlock
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
- Shapespace, Edinburgh, United Kingdom
| | - Katherine E. Dunn
- School of Engineering, University of Edinburgh, Edinburgh, United Kingdom
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249
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Kappel A, Nielsen PT, Kold S. 1-stage total knee arthroplasty and proximal tibial non-union correction using 3-D planning and custom-made cutting guide. Acta Orthop 2021; 92:452-454. [PMID: 33683179 PMCID: PMC8381981 DOI: 10.1080/17453674.2021.1894789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Affiliation(s)
- Andreas Kappel
- Interdisciplinary Orthopaedics, Aalborg University Hospital;
- Department of Clinical Medicine, Aalborg University, Denmark
| | | | - Søren Kold
- Interdisciplinary Orthopaedics, Aalborg University Hospital;
- Department of Clinical Medicine, Aalborg University, Denmark
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250
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Winnand P, Ayoub N, Redick T, Gesenhues J, Heitzer M, Peters F, Raith S, Abel D, Hölzle F, Modabber A. Navigation of iliac crest graft harvest using markerless augmented reality and cutting guide technology: A pilot study. Int J Med Robot 2021; 18:e2318. [PMID: 34328700 DOI: 10.1002/rcs.2318] [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: 03/04/2021] [Revised: 07/27/2021] [Accepted: 03/04/2021] [Indexed: 11/08/2022]
Abstract
BACKGROUND Defects of the facial skeleton often require complex reconstruction with vascularized grafts. This trial elucidated the usability, visual perception and accuracy of a markerless augmented reality (AR)-guided navigation for harvesting iliac crest transplants. METHODS Random CT scans were used to virtually plan two common transplant configurations on 10 iliac crest models, each printed four times. The transplants were harvested using projected AR and cutting guides. The duration and accuracies of the angulation, distance and volume between the planned and executed osteotomies were measured. RESULTS AR was characterized by the efficient use of time and accurate rendition of preoperatively planned geometries. However, vertical osteotomies and complex anatomical settings displayed significant inferiority of AR guidance compared to cutting guides. CONCLUSIONS This study demonstrated the usability of a markerless AR setup for harvesting iliac crest transplants. The visual perception and accuracy of the AR-guided osteotomies constituted remaining weaknesses against cutting guide technology.
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Affiliation(s)
- Philipp Winnand
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, Aachen, Germany
| | - Nassim Ayoub
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, Aachen, Germany
| | - Tim Redick
- Institute of Automatic Control, RWTH Aachen University, Aachen, Germany
| | - Jonas Gesenhues
- Institute of Automatic Control, RWTH Aachen University, Aachen, Germany
| | - Marius Heitzer
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, Aachen, Germany
| | - Florian Peters
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, Aachen, Germany
| | - Stefan Raith
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, Aachen, Germany
| | - Dirk Abel
- Institute of Automatic Control, RWTH Aachen University, Aachen, Germany
| | - Frank Hölzle
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, Aachen, Germany
| | - Ali Modabber
- Department of Oral and Maxillofacial Surgery, University Hospital RWTH Aachen, Aachen, Germany
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