1
|
Hatamleh MM, Hatamlah HM, Nuseir A. Use of 3-dimensional imaging and manufacturing for bilateral auricular prostheses: A case series of six patients with congenital auricular defects. J Prosthet Dent 2024; 132:1076-1081. [PMID: 36411112 DOI: 10.1016/j.prosdent.2022.09.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/27/2022] [Accepted: 09/27/2022] [Indexed: 11/19/2022]
Abstract
The prosthetic reconstruction of unilateral ear deformity is a straightforward procedure which relies on copying the details, position, and symmetry of the existing contralateral ear. However, reconstructing bilaterally missing ears is challenging. The use of 3-dimensional (3D) technology in the prosthetic reconstruction of the bilaterally missing ears of 6 patients is described. The deformity site was created directly by segmenting the patient's digital scan or indirectly via a desktop scanner. Adequate bone quantity and quality for implant retention and optimal implant locations were also identified virtually. The use of 3D technologies has made it more straightforward to accomplish ear symmetry, as well as to validate the orientation and location of the ears reliably with the minimum subjectivity. The printed ears were matched in shape, surface texture, and anatomy. The skin color was straightforward to record and store so that it could be reproduced at a future time. Overall, the digital manufacture of the ears was controlled, consistent, and reproducible.
Collapse
Affiliation(s)
- Muhanad M Hatamleh
- Assistant Professor and Vice Dean, Department of Applied Medical Sciences, Luminus Technical University College, Amman, Jordan; Consultant Clinical Scientist (Reconstructive Science), London, UK.
| | - Heba Mohammad Hatamlah
- Assistant Professor, Department of Hospital Management, Faculty of Business, Philadelphia University, Amman, Jordan
| | - Amjad Nuseir
- Associate Professor, ENT Department, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
| |
Collapse
|
2
|
Bannink T, de Ridder M, Bouman S, van Alphen MJA, van Veen RLP, van den Brekel MWM, Karakullukçu MB. Computer-aided design and fabrication of nasal prostheses: a semi-automated algorithm using statistical shape modeling. Int J Comput Assist Radiol Surg 2024; 19:2279-2285. [PMID: 38844749 PMCID: PMC11541403 DOI: 10.1007/s11548-024-03206-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Accepted: 05/30/2024] [Indexed: 11/07/2024]
Abstract
PURPOSE This research aimed to develop an innovative method for designing and fabricating nasal prostheses that reduces anaplastologist expertise dependency while maintaining quality and appearance, allowing patients to regain their normal facial appearance. METHODS The method involved statistical shape modeling using a morphable face model and 3D data acquired through optical scanning or CT. An automated design process generated patient-specific fits and appearances using regular prosthesis materials and 3D printing of molds. Manual input was required for specific case-related details. RESULTS The developed method met all predefined requirements, replacing analog impression-making and offering compatibility with various data acquisition methods. Prostheses created through this method exhibited equivalent aesthetics to conventionally fabricated ones while reducing the skill dependency typically associated with prosthetic design and fabrication. CONCLUSIONS This method provides a promising approach for both temporary and definitive nasal prostheses, with the potential for remote prosthesis fabrication in areas lacking anaplastology care. While new skills are required for data acquisition and algorithm control, these technologies are increasingly accessible. Further clinical studies will help validate its effectiveness, and ongoing technological advancements may lead to even more advanced and skill-independent prosthesis fabrication methods in the future.
Collapse
Affiliation(s)
- T Bannink
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, The Netherlands
| | - M de Ridder
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, The Netherlands
| | - S Bouman
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, The Netherlands
| | - M J A van Alphen
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Verwelius 3D Lab, Amsterdam, The Netherlands
| | - R L P van Veen
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Verwelius 3D Lab, Amsterdam, The Netherlands
| | - M W M van den Brekel
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, The Netherlands.
- Amsterdam Center of Language and Communication, University of Amsterdam, Amsterdam, The Netherlands.
- Department of Oral and Maxillofacial Surgery, Amsterdam University Medical Center, Amsterdam, The Netherlands.
| | - M B Karakullukçu
- Department of Head and Neck Oncology and Surgery, Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, The Netherlands
| |
Collapse
|
3
|
İnal CB, Bankoğlu Güngör M, Karakoca Nemli S. Response to the Letter to the Editor regarding, "Using a smartphone three dimensional scanning application (Polycam) to three dimensionally print an ear cast: A technique". J Prosthet Dent 2024; 132:847-848. [PMID: 39079815 DOI: 10.1016/j.prosdent.2024.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2024] [Revised: 07/07/2024] [Accepted: 07/09/2024] [Indexed: 10/01/2024]
Affiliation(s)
| | - Merve Bankoğlu Güngör
- Associate Professor, Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
| | - Seçil Karakoca Nemli
- Professor, Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
| |
Collapse
|
4
|
Frias V, Wachowiak L. Digital fabrication of custom tracheostomy appliances: A clinical report. J Prosthodont 2024. [PMID: 38987898 DOI: 10.1111/jopr.13899] [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: 02/16/2024] [Accepted: 06/06/2024] [Indexed: 07/12/2024] Open
Abstract
The use of rapid prototyping technology has revolutionized the fabrication of intraoral prostheses. With the advancement of digital technology, its applications have expanded to extraoral prostheses and appliances to replace a variety of head and neck defects. The following clinical report illustrates the use of a new technique that allows the digital replication and recontouring of a stock tracheostomy tube to improve patient fit, comfort, and esthetics.
Collapse
Affiliation(s)
- Vladimir Frias
- Department of Dentistry and Maxillofacial Prosthetics, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA
| | - Lindsay Wachowiak
- Department of Head & Neck Surgery, Roswell Park Comprehensive Cancer Center, Buffalo, New York, USA
| |
Collapse
|
5
|
Swanepoel HF, Matthews HS, Claes P, Vandermeulen D, Oettlé AC. A statistical shape model for estimating missing soft tissues of the face in a black South African population. J Prosthodont 2024; 33:565-573. [PMID: 37589169 DOI: 10.1111/jopr.13746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 07/30/2023] [Accepted: 08/11/2023] [Indexed: 08/18/2023] Open
Abstract
PURPOSE Facial disfigurement may affect the quality of life of many patients. Facial prostheses are often used as an adjuvant to surgical intervention and may sometimes be the only viable treatment option. Traditional methods for designing soft-tissue facial prostheses are time-consuming and subjective, while existing digital techniques are based on mirroring of contralateral features of the patient, or the use of existing feature templates/models that may not be readily available. We aim to support the objective and semi-automated design of facial prostheses with primary application to midline or bilateral defect restoration where no contralateral features are present. Specifically, we developed and validated a statistical shape model (SSM) for estimating the shape of missing facial soft tissue segments, from any intact parts of the face. MATERIALS AND METHODS An SSM of 3D facial variations was built from meshes extracted from computed tomography and cone beam computed tomography images of a black South African sample (n = 235) without facial disfigurement. Various types of facial defects were simulated, and the missing parts were estimated automatically by a weighted fit of each mesh to the SSM. The estimated regions were compared to the original regions using color maps and root-mean-square (RMS) distances. RESULTS Root mean square errors (RMSE) for defect estimations of one orbit, partial nose, cheek, and lip were all below 1.71 mm. Errors for the full nose, bi-orbital defects, as well as small and large composite defects were between 2.10 and 2.58 mm. Statistically significant associations of age and type of defect with RMSE were observed, but not with sex or imaging modality. CONCLUSION This method can support the objective and semi-automated design of facial prostheses, specifically for defects in the midline, crossing the midline or bilateral defects, by facilitating time-consuming and skill-dependent aspects of prosthesis design.
Collapse
Affiliation(s)
| | - Harold S Matthews
- Laboratory for Imaging Genetics, Department of Human Genetics, Katholieke Universiteit, Leuven, Belgium
- Medical Imaging Research Center, Universitair Ziekenhuis, Leuven, Belgium
- Facial Sciences, Murdoch Children's Research Institute, Parkville, Australia
| | - Peter Claes
- Laboratory for Imaging Genetics, Department of Human Genetics, Katholieke Universiteit, Leuven, Belgium
- Medical Imaging Research Center, Universitair Ziekenhuis, Leuven, Belgium
- Facial Sciences, Murdoch Children's Research Institute, Parkville, Australia
- Department of Electrical Engineering, Katholieke Universiteit, Leuven, Belgium
| | - Dirk Vandermeulen
- Medical Imaging Research Center, Universitair Ziekenhuis, Leuven, Belgium
- Department of Electrical Engineering, Katholieke Universiteit, Leuven, Belgium
| | - Anna C Oettlé
- Department of Anatomy, University of Pretoria, Pretoria, South Africa
- Anatomy and Histology Department, Sefako Makgatho Health Sciences University, Pretoria, South Africa
| |
Collapse
|
6
|
Jablonski RY, Malhotra T, Coward TJ, Shaw D, Bojke C, Pavitt SH, Nattress BR, Keeling AJ. Digital database for nasal prosthesis design with a 3D morphable face model approach. J Prosthet Dent 2024; 131:1271-1275. [PMID: 37019749 DOI: 10.1016/j.prosdent.2023.02.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 02/21/2023] [Accepted: 02/26/2023] [Indexed: 04/05/2023]
Abstract
Designing nasal prostheses can be challenging because of the unpaired nature of the facial feature, especially in patients lacking preoperative information. Various nose model databases have been developed as a helpful starting point for the computer-aided design of nasal prostheses, but these do not appear to be readily accessible. Therefore, an open-access digital database of nose models has been generated based on a 3-dimensional (3D) morphable face model approach. This article describes the generation of the database, highlights steps for designing a nasal prosthesis, and points readers to the database for future clinical application and research.
Collapse
Affiliation(s)
- Rachael Y Jablonski
- Specialty Trainee in Restorative Dentistry and NIHR Doctoral Fellow, Department of Restorative Dentistry, School of Dentistry, University of Leeds, Leeds, England.
| | - Taran Malhotra
- Lead Specialist Maxillofacial Prosthetist, Maxillofacial Prosthetics Laboratory, Liverpool University Hospitals NHS Foundation Trust, Aintree University Hospital, Liverpool, England
| | - Trevor J Coward
- Professor and Honorary Consultant in Maxillofacial and Craniofacial Rehabilitation, Academic Centre of Reconstructive Science, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London, England
| | - Daniel Shaw
- Maxillofacial Laboratory Manager, Maxillofacial Department, Chesterfield Royal Hospital Calow, Chesterfield, England
| | - Chris Bojke
- Professor of Health Economics, Academic Unit of Health Economics, School of Medicine, University of Leeds, Leeds, England
| | - Sue H Pavitt
- Professor of Translational and Applied Health Research, Dental Translational and Clinical Research Unit, School of Dentistry, University of Leeds, Leeds, England
| | - Brian R Nattress
- Clinical Professor and Honorary Consultant in Restorative Dentistry, Department of Restorative Dentistry, School of Dentistry, University of Leeds, Leeds, England
| | - Andrew J Keeling
- Professor of Prosthodontics and Digital Dentistry, Department of Restorative Dentistry, School of Dentistry, University of Leeds, Leeds, England
| |
Collapse
|
7
|
Generalova AN, Vikhrov AA, Prostyakova AI, Apresyan SV, Stepanov AG, Myasoedov MS, Oleinikov VA. Polymers in 3D printing of external maxillofacial prostheses and in their retention systems. Int J Pharm 2024; 657:124181. [PMID: 38697583 DOI: 10.1016/j.ijpharm.2024.124181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 04/12/2024] [Accepted: 04/28/2024] [Indexed: 05/05/2024]
Abstract
Maxillofacial defects, arising from trauma, oncological disease or congenital abnormalities, detrimentally affect daily life. Prosthetic repair offers the aesthetic and functional reconstruction with the help of materials mimicking natural tissues. 3D polymer printing enables the design of patient-specific prostheses with high structural complexity, as well as rapid and low-cost fabrication on-demand. However, 3D printing for prosthetics is still in the early stage of development and faces various challenges for widespread use. This is because the most suitable polymers for maxillofacial restoration are soft materials that do not have the required printability, mechanical strength of the printed parts, as well as functionality. This review focuses on the challenges and opportunities of 3D printing techniques for production of polymer maxillofacial prostheses using computer-aided design and modeling software. Review discusses the widely used polymers, as well as their blends and composites, which meet the most important assessment criteria, such as the physicochemical, biological, aesthetic properties and processability in 3D printing. In addition, strategies for improving the polymer properties, such as their printability, mechanical strength, and their ability to print multimaterial and architectural structures are highlighted. The current state of the prosthetic retention system is presented with a focus on actively used polymer adhesives and the recently implemented prosthesis-supporting osseointegrated implants, with an emphasis on their creation from 3D-printed polymers. The successful prosthetics is discussed in terms of the specificity of polymer materials at the restoration site. The approaches and technological prospects are also explored through the examples of the nasal, auricle and ocular prostheses, ranging from prototypes to end-use products.
Collapse
Affiliation(s)
- Alla N Generalova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia; Federal Scientific Research Center "Crystallography and Photonics" of the Russian Academy of Sciences, 119333 Moscow, Russia.
| | - Alexander A Vikhrov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Anna I Prostyakova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Samvel V Apresyan
- Institute of Digital Dentistry, Medical Institute, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya 6, 117198 Moscow, Russia
| | - Alexander G Stepanov
- Institute of Digital Dentistry, Medical Institute, Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya 6, 117198 Moscow, Russia
| | - Maxim S Myasoedov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Vladimir A Oleinikov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry of the Russian Academy of Sciences, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| |
Collapse
|
8
|
Hubacz JC, Gullard A, Sheridan RR, Versluis A. Accuracy and resolution of conventional and additively manufactured silicone elastomers as applied in maxillofacial therapies. J Prosthet Dent 2024:S0022-3913(24)00278-6. [PMID: 38704320 DOI: 10.1016/j.prosdent.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 04/02/2024] [Accepted: 04/03/2024] [Indexed: 05/06/2024]
Abstract
STATEMENT OF PROBLEM Silicone elastomers are becoming more readily available for additive manufacturing, which may be advantageous for fabricating maxillofacial prostheses. However, the properties of three-dimensionally (3D) printed silicone as compared with conventionally processed silicone have not been well studied. PURPOSE The purpose of this in vitro study was to compare the dimensional accuracy and surface resolution of additively manufactured with conventional room-temperature vulcanized (RTV) silicones. MATERIAL AND METHODS A custom aluminum mold was used to generate hand-spatulated specimens (A103 and VerSilTal-50F, n=20). A computer-aided design and computer-aided manufacturing workflow was used to generate additively manufactured specimens (Sil30 and TrueSil, n=20). Digital surface scans of each specimen were recorded; a scan of the mold served as the control. Surface dimensions were measured with a digital metrology software program, while digital overlays were made using a 3D processing software program. The surface resolution of the specimens was assessed by analyzing 4 topographical landmarks (flat surfaces, raised lines, domes, and scribed lines) with a visual qualitative grading scale. The data were analyzed with 1-way analysis of variance, followed by a Student-Newman-Keuls post hoc test (α=.05). RESULTS The specimens demonstrated statistical differences in trueness and precision (P<.001). The TrueSil specimens showed the largest deviation in measurements of trueness and precision (up to -1.374%). The other specimens yielded percentage mean differences that were more consistently within the range of the American Dental Association International Organization for Standardization standard for elastomers. The manually fabricated specimens yielded more consistently ideal ratings for resolution than did the additively manufactured ones, with the Sil30 specimens receiving the most Charlie (not clinically acceptable) ratings. CONCLUSIONS Numerical differences between each specimen and the control were considered negligible for maxillofacial applications. Notable discrepancies related to the quality of resolution, wherein the benchtop-manufactured specimens consistently generated better results compared with additively manufactured ones. Other factors, such as resiliency, odor, and cost, posed limitations in justifying the use of silicones in a direct-to-print workflow.
Collapse
Affiliation(s)
- Jenna C Hubacz
- Resident, Advanced Prosthodontics Program, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn
| | - Angela Gullard
- Assistant Professor and Implantology Director, Department of Prosthodontics, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn
| | - Ryan R Sheridan
- Director, Peterson Area Dental Laboratory, United States Air Force, Peterson Space Force Base, Colorado Springs, Colo.; and Military Consultant to the Air Force Surgeon General for Dental Laboratories, Air Force Medical Service, United States Air Force
| | - Antheunis Versluis
- Professor, Director of Biomaterials Research, Department of Bioscience Research, College of Dentistry, University of Tennessee Health Science Center, Memphis, Tenn.
| |
Collapse
|
9
|
El Charkawi HG, Abdelaziz MS. Novel CAD-CAM fabrication of a custom-made ball attachment retentive housing: an in-vitro study. Eur J Med Res 2023; 28:520. [PMID: 37968756 PMCID: PMC10652503 DOI: 10.1186/s40001-023-01498-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 11/02/2023] [Indexed: 11/17/2023] Open
Abstract
PURPOSE This study aims to evaluate the digitally designed ball attachment housing in its initial retentive force and after 2 years of simulated clinical use and to compare it with the regular nylon ball attachment housing. MATERIALS AND METHODS Twenty implants with their corresponding ball abutments (diameter 4.5 × 4.0 mm) were inserted in resin blocks. They were divided into two groups. In Group I, ten ball abutments each received their corresponding conventional attachment with nylon rings. In Group II, ten ball abutments received the novel CAD-CAM polyetheretherketone ball attachment housing. A universal testing machine was used to measure the retention force. The achieved maximum values of retention force were recorded at the beginning of the study (initial retention) and after 2 years of artificial ageing (2000 cycles of insertion and removal). Results were statistically analyzed using an independent sample T test. RESULTS The PEEK attachment housing showed high retention forces (25.12 ± 0.99 N) compared to the conventional attachment with a nylon ring (15.76 ± 0.93 N) in the initial dislodgement test. There was a statistically significant difference in mean retention at the initial retention test and after 2 years of stimulated usage between the two studied groups, p = 0.000. CONCLUSIONS Within the limitations of this study, the novel CAD-CAM-PEEK attachment showed high retention characteristics compared to the conventional attachment with nylon rings, initially and after simulated long-term use.
Collapse
Affiliation(s)
- Hussein G El Charkawi
- Department of Prosthodontics, Faculty of Oral and Dental Medicine, Future University, Fifth Settlement, End of 90 Street, Cairo, Egypt.
| | - Medhat Sameh Abdelaziz
- Department of Prosthodontics, Faculty of Oral and Dental Medicine, Future University, Fifth Settlement, End of 90 Street, Cairo, Egypt
| |
Collapse
|
10
|
Zheng W, Xu W, Zhou X, Li H, Li P, Xu Q. Application of 3D Transparent Facemasks in Long-Term Outpatient Rehabilitation of Facial Scars After Burns: A Retrospective Cohort Study of Improved Appearance of Target Scars With Different Healing Time. J Burn Care Res 2023; 44:1355-1364. [PMID: 37387307 DOI: 10.1093/jbcr/irad102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Indexed: 07/01/2023]
Abstract
Severe facial burns may cause scarring problems and affect living quality of patients. With the advent of 3D facemasks, it is being used to treat facial scars; however, its efficacy must be confirmed by adequate studies. A retrospective analysis of 26 patients who visited rehabilitation outpatient clinic from 2017 to 2022. Patients were separated into two groups based on the time to healing (TTH) following burn injury: early healing group (TTH ≤ 21 days) and late healing group (TTH > 21 days). To compare treatment outcomes and differences between the two groups, 3D facemask application was assessed using the Vancouver Scar Scale (VSS), patient satisfaction, and complications. In both groups, there were significant improvements in the total VSS scores (P < .01) and each VSS subscore (P < .01). These scar characteristics improved over time as the treatment progressed. Compared with the late healing group, the early healing group had more obvious effects on improving scar pigmentation (P < .05) and vascularity (P < .05) at similar assessment time points after burns. At the last assessment, there was a significant difference in total VSS scores between groups (P = .009). For the early and late healing groups, respectively, the mean gradient value (SE) of the total VSS scores was 1.550 (0.373) and 1.283 (0.224) over the course of the treatment periods. 3D facemasks are effective in the rehabilitation of facial scars caused by burns, which should be used for prevention and treatment in the initial stages of scar development.
Collapse
Affiliation(s)
- Weiting Zheng
- Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Wanting Xu
- Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Xianliang Zhou
- Department of Rehabilitation, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Hua Li
- Department of Rehabilitation, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - Pengtao Li
- Department of Burn, The First Affiliated Hospital of Anhui Medical University
| | - Qinglian Xu
- Department of Burn, The First Affiliated Hospital of Anhui Medical University
| |
Collapse
|
11
|
Unkovskiy A, Spintzyk S, Kiemle T, Roehler A, Huettig F. Trueness and precision of skin surface reproduction in digital workflows for facial prosthesis fabrication. J Prosthet Dent 2023; 130:402-413. [PMID: 35256182 DOI: 10.1016/j.prosdent.2021.06.050] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 06/22/2021] [Accepted: 06/22/2021] [Indexed: 10/18/2022]
Abstract
STATEMENT OF PROBLEM How much skin surface details of facial prostheses can be transferred throughout the digital production chain has not been quantified. PURPOSE The purpose of this in vitro study was to quantify the amount of skin surface details transferred from the prosthesis virtual design through the prototype printing with various additive manufacturing (AM) methods to the definitive silicone prosthesis with an indirect mold-making approach. MATERIAL AND METHODS Twelve test blocks with embossed wrinkles of 0.05 to 0.8 mm and 12 test blocks with applied earlobe skin structures were printed with stereolithography (SLA), direct light processing (DLP), and PolyJet methods (n=4). DLP and SLA prototype specimens were duplicated in wax. All specimens were then transferred into medical-grade silicone. Rz values of the wrinkle test blocks and the root mean square error (RMSE) of the earlobe test blocks were evaluated by laser topography to determine the trueness and precision of each stage. RESULTS For the earlobe test blocks, the PolyJet method had superior trueness and precision of the final skin surface reproduction. The SLA method showed the poorest trueness, and the DLP method, the lowest precision. For the wrinkle test blocks, the PolyJet method had the best wrinkle profile reproduction level, followed by DLP and SLA. CONCLUSIONS The indirect mold-making approach of facial prostheses manufacturing may be associated with 7% of skin surface profile loss with SLA, up to 20% with DLP, and no detail loss with PolyJet.
Collapse
Affiliation(s)
- Alexey Unkovskiy
- Research Associate, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Berlin, Germany; Department of Dental Surgery, Sechenov First Moscow State Medical University, Moscow, Russia.
| | - Sebastian Spintzyk
- Research Associate, Section "Medical Materials and Science", Tuebingen University Hospital, Tuebingen, Germany
| | - Tobias Kiemle
- Research Associate, Department of Geosciences, University of Tuebingen, Tuebingen, Germany
| | - Ariadne Roehler
- Research Associate, Section "Medical Materials and Science", Tuebingen University Hospital, Tuebingen, Germany
| | - Fabian Huettig
- Acting Deputy Head, Priv.-Doz, Department of Prosthodontics, Centre of Dentistry, Oral Medicine, and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Tuebingen, Germany
| |
Collapse
|
12
|
Hatamleh MM, Maqableh AM, Al-Wahadni A, Al-Rabab'ah MA. Mechanical properties and bonding of maxillofacial silicone elastomer mixed with nano-sized anti-microbials. Dent Mater 2023; 39:677. [PMID: 37271602 DOI: 10.1016/j.dental.2023.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 05/14/2023] [Accepted: 05/15/2023] [Indexed: 06/06/2023]
Abstract
OBJECTIVES The antibacterial efficacy of silicone is improved by impregnating it with antimicrobials such as chlorohexidine and zinc oxide. The purpose of this study was to examine mechanical properties and bonding of maxillofacial silicone elastomer mixed with Zinc Oxide nanoparticles (ZnO-NP), and Chlorohexidine Diacetate Salt (CHX) at three different concentrations (1 %, 3 %, and 5 %). METHODS Specimens of a silicone elastomer (M511) were prepared and divided into 7 groups. Group 1 was control of no additive. Groups 2-4 included silicone elastomer mixed with ZnO-NP (surface area = 67 m2/g) at 3 different concentrations (by weight %); 1 %, 3 % and 5 %. Groups 5-7 included silicone elastomer mixed with CHX at the same concentrations. Tear and tensile strengths, elongation percentage, modulus of elasticity, and shear bond strength to primed acrylic resin surfaces were evaluated. Data was analyzed with 1-way ANOVA, Bonferroni, and Dunnett's T3 post-hoc tests (P < 0.05). RESULTS There was significant effect of the additives on the tensile strength, elongation percentage, tear strength, and shear bond strength (P < 0.05). Shear bond strengths ranged from 0.55 to 0.96 MPa. Silicone elastomer mixed with CHX (5 %) resulted in the highest shear bond strength (P < 0.05). Non-linear regressions between tensile strength and ZnO and CHX additives were 0.95 and 0.96 respectively. SIGNIFICANCE All additives reduced the tensile strength of the silicone. However, CHX at 5 % optimized shear bond strength and thus is proposed in order to fabricate maxillofacial prostheses of sufficient mechanical properties, bonding and antimicrobial activity.
Collapse
Affiliation(s)
- Muhanad M Hatamleh
- School of Applied Medical Science, Luminus Technical University College (LTUC), Amman, Jordan.
| | - Ayman M Maqableh
- School of Electro-Mechanical Engineering, Luminus Technical University College (LTUC), Amman, Jordan
| | - Ahed Al-Wahadni
- Faculty of Dentistry, Jordan University of Science and Technology, Irbid, Jordan
| | | |
Collapse
|
13
|
Jablonski RY, Coward TJ, Bartlett P, Keeling AJ, Bojke C, Pavitt SH, Nattress BR. IMproving facial PRosthesis construction with contactlESs Scanning and Digital workflow (IMPRESSeD): study protocol for a feasibility crossover randomised controlled trial of digital versus conventional manufacture of facial prostheses in patients with orbital or nasal facial defects. Pilot Feasibility Stud 2023; 9:110. [PMID: 37400919 DOI: 10.1186/s40814-023-01351-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2022] [Accepted: 06/20/2023] [Indexed: 07/05/2023] Open
Abstract
BACKGROUND Facial prostheses can have a profound impact on patients' appearance, function and quality of life. There has been increasing interest in the digital manufacturing of facial prostheses which may offer many benefits to patients and healthcare services compared with conventional manufacturing processes. Most facial prosthesis research has adopted observational study designs with very few randomised controlled trials (RCTs) documented. There is a clear need for a well-designed RCT to compare the clinical and cost-effectiveness of digitally manufactured facial prostheses versus conventionally manufactured facial prostheses. This study protocol describes the planned conduct of a feasibility RCT which aims to address this knowledge gap and determine whether it is feasible to conduct a future definitive RCT. METHODS The IMPRESSeD study is a multi-centre, 2-arm, crossover, feasibility RCT with early health technology assessment and qualitative research. Up to 30 participants with acquired orbital or nasal defects will be recruited from the Maxillofacial Prosthetic Departments of participating NHS hospitals. All trial participants will receive 2 new facial prostheses manufactured using digital and conventional manufacturing methods. The order of receiving the facial prostheses will be allocated centrally using minimisation. The 2 prostheses will be made in tandem and marked with a colour label to mask the manufacturing method to the participants. Participants will be reviewed 4 weeks following the delivery of the first prosthesis and 4 weeks following the delivery of the second prosthesis. Primary feasibility outcomes include eligibility, recruitment, conversion, and attrition rates. Data will also be collected on patient preference, quality of life and resource use from the healthcare perspective. A qualitative sub-study will evaluate patients' perception, lived experience and preference of the different manufacturing methods. DISCUSSION There is uncertainty regarding the best method of manufacturing facial prostheses in terms of clinical effectiveness, cost-effectiveness and patient acceptability. There is a need for a well-designed RCT to compare digital and conventional manufacturing of facial prostheses to better inform clinical practice. The feasibility study will evaluate key parameters needed to design a definitive trial and will incorporate early health technology assessment and a qualitative sub-study to identify the potential benefits of further research. TRIAL REGISTRATION ISRCTN ISRCTN10516986). Prospectively registered on 08 June 2021, https://www.isrctn.com/ISRCTN10516986 .
Collapse
Affiliation(s)
- Rachael Y Jablonski
- Department of Restorative Dentistry, School of Dentistry, University of Leeds, Leeds, UK.
| | - Trevor J Coward
- Academic Centre of Reconstructive Science, Faculty of Dentistry, Oral and Craniofacial Sciences, King's College London, London, UK
| | - Paul Bartlett
- Maxillofacial Laboratory, Leeds Dental Institute, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Andrew J Keeling
- Department of Restorative Dentistry, School of Dentistry, University of Leeds, Leeds, UK
| | - Chris Bojke
- Academic Unit of Health Economics, Leeds Institute of Health Sciences, University of Leeds, Leeds, UK
| | - Sue H Pavitt
- Dental Translational and Clinical Research Unit, School of Dentistry, University of Leeds, Leeds, UK
| | - Brian R Nattress
- Department of Restorative Dentistry, School of Dentistry, University of Leeds, Leeds, UK
| |
Collapse
|
14
|
Dżaman K, Ziemska-Gorczyca M, Anurin I, Błaszczyk M. The Latest Craniofacial Reconstructive Techniques Using Anchored Implants after Surgical Treatment of Nasal and Paranasal Sinuses Tumors. Healthcare (Basel) 2023; 11:1663. [PMID: 37372781 DOI: 10.3390/healthcare11121663] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/24/2023] [Accepted: 06/05/2023] [Indexed: 06/29/2023] Open
Abstract
Reconstructive surgery after surgical treatment of neoplasms in the head and neck region is always a challenge. Many factors are responsible for the success of reconstruction. The anatomy of the facial region is complex, which significantly influences the aesthetic effect of the reconstruction. Moreover, many patients undergo postoperative radiotherapy after surgical treatment, which affects the range of reconstructive techniques. The aim of this study is to review current reconstructive methods in the craniofacial region, using bone-anchored implants to attach nasal prostheses. The article also comprises the authors' own experience with successful single-stage, Vistafix 3 osseointegrated implants for the attachment of an external nasal prosthesis in a 51-year-old man after surgical removal of squamous cell carcinoma of the nose and paranasal sinuses. The literature search for articles regarding implants in craniofacial reconstructions was performed using the three following databases: Scopus, Web of Science and MEDLINE (through PubMed), and follows the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Statement (PRISMA). A systematic literature search was set for 2018-2023 and retrieved 92 studies. From them, 18 articles were included in the review.
Collapse
Affiliation(s)
- Karolina Dżaman
- Department of Otolaryngology, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813 Warsaw, Poland
| | - Marlena Ziemska-Gorczyca
- Department of Otolaryngology, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813 Warsaw, Poland
| | - Igor Anurin
- Department of Otolaryngology, Centre of Postgraduate Medical Education, Marymoncka 99/103, 01-813 Warsaw, Poland
| | - Magdalena Błaszczyk
- Faculty of Science and Technology, University of Silesia in Katowice, 40-007 Katowice, Poland
| |
Collapse
|
15
|
Frias V, Hsu L. Three-dimensionally printed facial prosthesis with a silicone veneer technique: A clinical report. J Prosthet Dent 2023:S0022-3913(23)00119-1. [PMID: 36966101 DOI: 10.1016/j.prosdent.2023.01.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 01/27/2023] [Accepted: 01/27/2023] [Indexed: 03/27/2023]
Abstract
Digital technology has revolutionized the acquisition of patient data and the fabrication of prosthetic replacements for extraoral defects. This clinical report illustrates the use of a new technique which allows the digital creation of an acrylic resin framework which is then veneered with silicone to create an esthetic prosthesis in less time and with less patient discomfort.
Collapse
Affiliation(s)
- Vladimir Frias
- Associate Professor of Oncology, Department of Oral Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY.
| | - Larson Hsu
- Assistant Professor of Oncology, Department of Diagnostic Radiology, Roswell Park Comprehensive Cancer Center, Buffalo, NY
| |
Collapse
|
16
|
Costa-Palau S, Clua-Palau A, Real-Voltas F, Brufau-de Barberà M, Cabratosa-Termes J. A comparison of digital and conventional fabrication techniques for an esthetic maxillofacial prosthesis for the cheek and lip. J Prosthet Dent 2023:S0022-3913(23)00062-8. [PMID: 36872157 DOI: 10.1016/j.prosdent.2023.01.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 01/11/2023] [Accepted: 01/11/2023] [Indexed: 03/06/2023]
Abstract
Maxillofacial prostheses have traditionally been manufactured by pouring silicone into molds. However, the development of computer-aided design and computer-aided manufacturing (CAD-CAM) systems allows the virtual planning, design, and manufacture of maxillofacial prostheses through the direct 3-dimensional printing of silicone. This clinical report describes the digital workflow as an alternative to the conventional method of restoring a large midfacial defect in the right cheek and lip. In addition, the approaches were nonblinded evaluated in relation to outcomes and time efficiency, while marginal adaptation and esthetics, including patient satisfaction, were assessed for both prostheses fabricated. The digital prosthesis had acceptable esthetics and fit with improved patient satisfaction, especially in terms of efficiency, comfort, and speed of the digital workflow.
Collapse
Affiliation(s)
- Santiago Costa-Palau
- Associate Professor, Department of Restorative Dentistry, School of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Anna Clua-Palau
- Assistant Professor, Department of Restorative Dentistry, School of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Francisco Real-Voltas
- Associate Professor, Department of Restorative Dentistry, School of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain.
| | - Magí Brufau-de Barberà
- Associate Professor, Department of Restorative Dentistry, School of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain
| | - Josep Cabratosa-Termes
- Associate Professor, Department of Restorative Dentistry, School of Dentistry, Universitat Internacional de Catalunya, Barcelona, Spain
| |
Collapse
|
17
|
Beatty MW, Wee AG, Marx DB, Ridgway L, Simetich B, De Sousa TC, Vakilzadian K, Schulte J. Viscoelastic Properties of Human Facial Skin and Comparisons with Facial Prosthetic Elastomers. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2023. [PMID: 36903138 PMCID: PMC10004410 DOI: 10.3390/ma16052023] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 02/23/2023] [Accepted: 02/23/2023] [Indexed: 06/18/2023]
Abstract
Prosthesis discomfort and a lack of skin-like quality is a source of patient dissatisfaction with facial prostheses. To engineer skin-like replacements, knowledge of the differences between facial skin properties and those for prosthetic materials is essential. This project measured six viscoelastic properties (percent laxity, stiffness, elastic deformation, creep, absorbed energy, and percent elasticity) at six facial locations with a suction device in a human adult population equally stratified for age, sex, and race. The same properties were measured for eight facial prosthetic elastomers currently available for clinical usage. The results showed that the prosthetic materials were 1.8 to 6.4 times higher in stiffness, 2 to 4 times lower in absorbed energy, and 2.75 to 9 times lower in viscous creep than facial skin (p < 0.001). Clustering analyses determined that facial skin properties fell into three groups-those associated with body of ear, cheek, and remaining locations. This provides baseline information for designing future replacements for missing facial tissues.
Collapse
Affiliation(s)
- Mark W. Beatty
- Research Service, VA Nebraska-Western Iowa Healthcare System, 4101 Woolworth Avenue, Omaha, NE 68105, USA
- Department of Adult Restorative Dentistry, University of Nebraska Medical Center College of Dentistry, 4000 East Campus Loop South, Lincoln, NE 68583, USA
| | - Alvin G. Wee
- Research Service, VA Nebraska-Western Iowa Healthcare System, 4101 Woolworth Avenue, Omaha, NE 68105, USA
- Department of Restorative Sciences, University of Minnesota School of Dentistry, Malcolm Moos Health Sciences Tower, 515 Delaware Street SE, Minneapolis, MN 55455, USA
| | - David B. Marx
- Department of Statistics, 340 Hardin Hall, University of Nebraska-Lincoln, Lincoln, NE 68583, USA
| | - Lauren Ridgway
- Formerly Department of Prosthodontics, Creighton University School of Dentistry, 2109 Cuming Street, Omaha, NE 68102, USA
| | - Bobby Simetich
- Department of Adult Restorative Dentistry, University of Nebraska Medical Center College of Dentistry, 4000 East Campus Loop South, Lincoln, NE 68583, USA
| | - Thiago Carvalho De Sousa
- Department of Dentistry, School of Health Sciences, University of Brasilia (UnB), Brasilia 70910-900, Brazil
| | - Kevin Vakilzadian
- Private Practice, Pine Ridge Dental, 8545 Executive Woods Drive Suite #2, Lincoln, NE 68512, USA
| | - Joel Schulte
- Process Engineer, GSK Consumer Healthcare, 1401 Cornhusker Highway, Lincoln, NE 68517, USA
| |
Collapse
|
18
|
Eyzaguirre D, Salazar-Gamarra R, Binasco Lengua S, Lauria Dib L. Evaluation of additive manufacturing processes in the production of oculo-palpebral prosthesis. F1000Res 2023; 11:505. [PMID: 38249120 PMCID: PMC10799225 DOI: 10.12688/f1000research.111231.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/06/2023] [Indexed: 01/23/2024] Open
Abstract
Background: Prosthetic restorations are made to adapt or attach missing human parts in order to restore function and appearance. Maxillofacial defects connote a greater impact on patients, since the face cannot be concealed, and all the senses of the human body are expressed in it. Therefore, in order to restore the patient's quality of life, they are the ones that require the best possible adaptation to the characteristics of the patients. Methods: For the maxillofacial prostheses to fit patients, they must be personalized for each patient. The NGO "Mais Identidade" is a multidisciplinary team that specializes in the rehabilitation of patients with maxillofacial trauma. They use digital manufacturing as a tool to manufacture personalized maxillofacial prostheses for patients. With the help of the NGO, the following research is conducted with the purpose of evaluating different methods of additive manufacturing, 3D printing, in order to select the equipment that suits the needs of the method used in the manufacture of maxillofacial prostheses. To this end, eyelid models will be manufactured in different additive manufacturing equipment, and these will be evaluated according to their economic, physical, and aesthetic characteristics.
Collapse
Affiliation(s)
| | - Rodrigo Salazar-Gamarra
- Plus Identity Institute, Sao Paulo, Brazil
- Norbert Wiener University - Digital Transformation Research Center, Lima, Peru
| | | | | |
Collapse
|
19
|
Slijepcevic AA, Afshari A, Vitale AE, Couch SM, Jeanpierre LM, Chi JJ. A Contemporary Review of the Role of Facial Prostheses in Complex Facial Reconstruction. Plast Reconstr Surg 2023; 151:288e-298e. [PMID: 36696329 DOI: 10.1097/prs.0000000000009856] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
BACKGROUND Maxillofacial prostheses provide effective rehabilitation of complex facial defects as alternatives to surgical reconstruction. Although facial prostheses provide aesthetically pleasing reconstructions, multiple barriers exist that prevent their routine clinical use. The accessibility of facial prostheses is limited by the scarce supply of maxillofacial prosthodontists, significant time commitment and number of clinic appointments required of patients during prosthesis fabrication, short lifespan of prostheses, and limited outcomes data. METHODS A literature review was completed using PubMed and Embase databases, with search phrases including face and maxillofacial prostheses. Patient cases are included to illustrate the use of facial prostheses to reconstruct complex facial defects. RESULTS The clinical use of facial prostheses requires a multidisciplinary team including a reconstructive surgeon, a maxillofacial prosthodontist, and an anaplastologist, if available, to provide patients with aesthetically appropriate facial prostheses. Developing technology including computer-aided design and three-dimensional printing may improve the availability of facial prostheses by eliminating multiple steps during prosthesis fabrication, ultimately decreasing the time required to fabricate a prosthesis. In addition, enhanced materials may improve prosthesis durability. Long-term outcomes data using validated measures is needed to support the continued use of facial prostheses. CONCLUSIONS Facial prostheses can be used to reconstruct complex facial defects, and bone-anchored prostheses are associated with high patient satisfaction. Multiple barriers prevent prostheses from being used for facial reconstruction. New technologies to assist the design and fabrication of prostheses, and cost reduction measures, may allow their use in the appropriately selected patient.
Collapse
Affiliation(s)
| | - Azadeh Afshari
- Division of Maxillofacial Prosthodontics, Barnes-Jewish Hospital
| | - Ann E Vitale
- Division of Maxillofacial Prosthodontics, Barnes-Jewish Hospital
| | | | | | - John J Chi
- Division of Facial Plastic and Reconstructive Surgery, Washington University in St. Louis
| |
Collapse
|
20
|
Kurt M, Kurt Z, Işık Ş. Using deep learning approaches for coloring silicone maxillofacial prostheses: A comparison of two approaches. J Indian Prosthodont Soc 2023; 23:84-89. [PMID: 36588380 PMCID: PMC10088445 DOI: 10.4103/jips.jips_149_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 06/14/2022] [Accepted: 06/30/2022] [Indexed: 12/31/2022] Open
Abstract
Aim This study aimed to compare the performance of two deep learning algorithms, attention-based gated recurrent unit (GRU), and the artificial neural networks (ANNs) algorithm for coloring silicone maxillofacial prostheses. Settings and Design This was an in vitro study. Materials and Methods A total of 21 silicone samples in different colors were produced with four pigments (white, yellow, red, and blue). The color of the samples was measured with a spectrophotometer, then the LFNx01, aFNx01, and bFNx01 values were recorded. The relationship between the LFNx01, aFNx01, and bFNx01 values of each sample and the amount of each pigment in the compound of the same sample was used as the training dataset, entered into each algorithm, and the prediction models were obtained. While generating the prediction model for each sample, the data of the corresponding sample assigned as the target color were excluded. LFNx01, aFNx01, and bFNx01 values of each target sample were entered into the obtained models separately, and recipes indicating the ratios for mixing the four pigments were predicted. The mean absolute error (MAE) and root mean square error (RMSE) values between the original recipe used in the production of each silicone and the recipe created by both prediction models for the same silicone were calculated. Statistical Analysis Used Data were analyzed with the Student t-test (α=0.05). Results The mean RMSE values and MAE values for the ANN algorithm (0.029 ± 0.0152 and 0.045 ± 0.0235, respectively) were found significantly higher than the attention-based GRU model (0.001 ± 0.0005 and 0.002 ± 0.0008, respectively) (P < 0.001). Conclusions Attention-based GRU model provided better performance than the ANN algorithm with respect to the MAE and RMSE values.
Collapse
Affiliation(s)
- Meral Kurt
- Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey
| | - Zuhal Kurt
- Department of Computer Engineering, Faculty of Engineering, Atilim University, Ankara, Turkey
| | - Şahin Işık
- Department of Computer Engineering, Faculty of Engineering, Eskisehir Osmangazi University, Eskisehir, Turkey
| |
Collapse
|
21
|
Apresyan SV, Stepanov AG, Suonio VK, Vardanyan BA. [Manufacture of facial prosthesis by three-dimensional printing]. STOMATOLOGIIA 2023; 102:86-90. [PMID: 37622308 DOI: 10.17116/stomat202310204186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/26/2023]
Abstract
The objective of the literature review was to study and analyze literature sources on the methods and means of facial prosthesis manufacture by three-dimensional printing. MATERIALS AND METHODS An analysis of information sources covering the last 15 years was carried out, in search sources as PubMed, Elsiver and eLIBRARY and on the website of the Federal Institute of Industrial Property. RESULTS The technology of direct production of prostheses by volumetric printing from silicone materials is the object of research for its development. Most of the materials used for the manufacture of facial prostheses using 3D printing need technical improvements, often requiring expensive equipment, which in turn does not allow the method of manufacturing face prostheses by direct method in everyday clinical practice. CONCLUSION Based on the obtained data there is a need to develop a new structural material for the manufacture of facial prostheses by 3D printing using laser stereolithography and digital LED projection technologies.
Collapse
Affiliation(s)
- S V Apresyan
- Peoples Friendship University of Russia, Moscow, Russia
| | - A G Stepanov
- Peoples Friendship University of Russia, Moscow, Russia
| | - V K Suonio
- Peoples Friendship University of Russia, Moscow, Russia
| | - B A Vardanyan
- Peoples Friendship University of Russia, Moscow, Russia
| |
Collapse
|
22
|
Sarraj S, Szymiczek M, Jurczyk S. Influence of Herbal Fillers Addition on Selected Properties of Silicone Subjected to Accelerated Aging. Polymers (Basel) 2022; 15:polym15010042. [PMID: 36616391 PMCID: PMC9823497 DOI: 10.3390/polym15010042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 12/16/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022] Open
Abstract
This work aims to assess the impact of the type and percentage of powdered herbs on selected properties of silicone-based composites. The matrix was an addition cross-linked platinum-cured polydimethylsiloxane. The fillers were powdered thyme and sage, which were introduced at 5, 10, and 15 wt.%. The introduced fillers differed in composition, morphology, and grain size. The grain morphology showed differences in the size and shape of the introduced fillers. The qualitative and quantitative assessment resulting from the incorporation was conducted based on tests of selected properties: density, wettability, rebound resilience, hardness, and tensile strength. The incorporation slightly affected the density and wettability of the silicone. Rebound resilience and hardness results differed depending on the filler type and fraction. However, tensile strength decreased, which may be due to the matrix's distribution of fillers and their chemical composition. Antibacterial activity evaluation against S. aureus proved the bacteriostatic properties of the composites. Accelerated aging in PBS solution further deteriorated the mechanical properties. FTIR and DSC have demonstrated the progressive aging of the materials. In addition, the results showed an overall minimal effect of fillers on the silicone chemical backbone and melting temperature. The developed materials can be used in applications that do not require high mechanical properties.
Collapse
Affiliation(s)
- Sara Sarraj
- Department of Theoretical and Applied Mechanics, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland
- Correspondence: ; Tel.: +48-32-237-13-48
| | - Małgorzata Szymiczek
- Department of Theoretical and Applied Mechanics, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland
| | - Sebastian Jurczyk
- Łukasieiwcz Research Network—Institute for Engineering of Polymer Materials and Dyes, M. Sklodowska-Curie 55, 87-100 Toruń, Poland
| |
Collapse
|
23
|
Lee YC, Zheng J, Kuo J, Acosta-Vélez GF, Linsley CS, Wu BM. Binder Jetting of Custom Silicone Powder for Direct Three-Dimensional Printing of Maxillofacial Prostheses. 3D PRINTING AND ADDITIVE MANUFACTURING 2022; 9:520-534. [PMID: 36660746 PMCID: PMC9831568 DOI: 10.1089/3dp.2021.0019] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Recent advances in digital workflow have transformed clinician's ability to offer patient-specific devices for medical and dental applications. However, the digital workflow of patient-specific maxillofacial prostheses (MFP) remains incomplete, and several steps in the manufacturing process are still labor-intensive and are costly in both time and resources. Despite the high demand for direct digital MFP manufacturing, three-dimensional (3D) printing of colored silicone MFP is limited by the processing routes of medical-grade silicones and biocompatible elastomers. In this study, a binder jetting 3D printing process with polyvinyl butyral (PVB)-coated silicone powder was developed for direct 3D printing of MFP. Nanosilica-treated silicone powder was spray dried with PVB by controlling the Ohnesorge number and processing parameters. After printing, the interconnected pores were infused with silicone and hexamethyldisiloxane (HMDS) by pressure-vacuum sequential infiltration to produce the final parts. Particle size, coating composition, surface treatment, and infusion conditions influenced the mechanical properties of the 3D-printed preform, and of the final infiltrated structure. In addition to demonstrating the feasibility of using silicone powder-based 3D printing for MFP, these results can be used to inform the modifications required to accommodate the manufacturing of other biocompatible elastomeric materials.
Collapse
Affiliation(s)
- Yun Chang Lee
- Department of Mechanical and Aerospace Engineering, Samueli School of Engineering, University of California, Los Angeles, California, USA
- Weintraub Center for Reconstructive Biotechnology, School of Dentistry, University of California, Los Angeles, USA
- Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles, USA
| | - Jisi Zheng
- Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jonathan Kuo
- Department of Bioengineering, Samueli School of Engineering, University of California, Los Angeles, USA
| | - Giovanny F. Acosta-Vélez
- Weintraub Center for Reconstructive Biotechnology, School of Dentistry, University of California, Los Angeles, USA
- Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles, USA
| | - Chase S. Linsley
- Department of Bioengineering, Samueli School of Engineering, University of California, Los Angeles, USA
| | - Benjamin M. Wu
- Weintraub Center for Reconstructive Biotechnology, School of Dentistry, University of California, Los Angeles, USA
- Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles, USA
- Department of Bioengineering, Samueli School of Engineering, University of California, Los Angeles, USA
- Division of Advanced Prosthodontics, School of Dentistry, University of California, Los Angeles, USA
- Department of Materials Science and Engineering, Samueli School of Engineering, University of California, Los Angeles, USA
- Department of Orthopaedic Surgery, David Geffen School of Medicine, University of California, Los Angeles, USA
- Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, California, USA
| |
Collapse
|
24
|
Salazar-Gamarra R, Binasco S, Seelaus R, Dib LL. Present and future of extraoral maxillofacial prosthodontics: Cancer rehabilitation. FRONTIERS IN ORAL HEALTH 2022; 3:1003430. [PMID: 36338571 PMCID: PMC9627490 DOI: 10.3389/froh.2022.1003430] [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: 07/26/2022] [Accepted: 09/12/2022] [Indexed: 11/29/2022] Open
Abstract
Historically, facial prosthetics have successfully rehabilitated individuals with acquired or congenital anatomical deficiencies of the face. This history includes extensive efforts in research and development to explore best practices in materials, methods, and artisanal techniques. Presently, extraoral maxillofacial rehabilitation is managed by a multiprofessional team that has evolved with a broadened scope of knowledge, skills, and responsibility. This includes the mandatory integration of different professional specialists to cover the bio-psycho-social needs of the patient, systemic health and pathology surveillance, and advanced restorative techniques, which may include 3D technologies. In addition, recent digital workflows allow us to optimize this multidisciplinary integration and reduce the active time of both patients and clinicians, as well as improve the cost-efficiency of the care system, promoting its access to both patients and health systems. This paper discusses factors that affect extraoral maxillofacial rehabilitation's present and future opportunities from teamwork consolidation, techniques utilizing technology, and health systems opportunities.
Collapse
Affiliation(s)
- Rodrigo Salazar-Gamarra
- Department of Research, Plus Identity Institute, São Paulo, Brazil
- Centro de Investigación en Transformación Digital, Universidad Norbert Wiener (UNW), Lima, Perú
| | - Salvatore Binasco
- Department of Research, Plus Identity Institute, São Paulo, Brazil
- Postgraduation Program in Engineering, Universidade Paulista (UNIP), São Paulo, Brazil
| | - Rosemary Seelaus
- Department of Research, Plus Identity Institute, São Paulo, Brazil
- The Craniofacial Center, University of Illinois at Chicago, Chicago, IL, United States
| | - Luciando Lauria Dib
- Department of Research, Plus Identity Institute, São Paulo, Brazil
- Postgraduation Program in Dentistry, Universidade Paulista (UNIP), São Paulo, Brazil
| |
Collapse
|
25
|
Salazar-Gamarra R, Cárdenas-Bocanegra A, Masch U, Da Costa Moraes CA, Seelaus R, Lopes Da Silva JV, Lauria Dib L. Color translation from monoscopic photogrammetry +ID Methodology into a Polyjet final 3D printed facial prosthesis. F1000Res 2022; 11:582. [PMID: 38434006 PMCID: PMC10904947 DOI: 10.12688/f1000research.111196.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/05/2022] [Indexed: 03/05/2024] Open
Abstract
Background: The artistic techniques necessary to fabricate facial prostheses mainly depend on individual skill and are not a resource easily reproduced. Digital technology has contributed to improved outcomes, often combining analog and new digital techniques in the same workflow. Methods: This article aims to present an innovative workflow to produce a final colored 3D printed and facial prosthesis by UV-map color translation into colored resin 3D printing. A modified +ID Methodology was used to obtain 3D models with the calibrated 3D printable patient's skin color. No hands-on physical molding, manual sculpture, or intrinsic silicone coloration was used. Results: The outcome resulted in acceptable aesthetics, adaptation, and an approximate color match after extrinsic coloration. The patient reported good comfort and acceptance. Conclusions: A direct resin 3D printed prosthesis may be a viable alternative, especially for rapid delivery as an immediate prosthesis or an option when there is no experienced anaplastogist to manufacture a conventional prosthesis.
Collapse
Affiliation(s)
- Rodrigo Salazar-Gamarra
- Norbert Wiener University - Digital Transformation Research Centre, Lima, 15046, Peru
- Plus Identity (+ID) Institute, São Paulo, 04057-000, Brazil
| | | | | | | | - Rosemary Seelaus
- The Craniofacial Center, Department of Surgery, University of Illinois at Chicago, Chicago, 60612, USA
| | | | - Luciano Lauria Dib
- Plus Identity (+ID) Institute, São Paulo, 04057-000, Brazil
- Paulista University, São Paulo, 04057-000, Brazil
| |
Collapse
|
26
|
Kundrata I, Barr MKS, Tymek S, Döhler D, Hudec B, Brüner P, Vanko G, Precner M, Yokosawa T, Spiecker E, Plakhotnyuk M, Fröhlich K, Bachmann J. Additive Manufacturing in Atomic Layer Processing Mode. SMALL METHODS 2022; 6:e2101546. [PMID: 35277944 DOI: 10.1002/smtd.202101546] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 02/08/2022] [Indexed: 06/14/2023]
Abstract
Additive manufacturing (3D printing) has not been applicable to micro- and nanoscale engineering due to the limited resolution. Atomic layer deposition (ALD) is a technique for coating large areas with atomic thickness resolution based on tailored surface chemical reactions. Thus, combining the principles of additive manufacturing with ALD could open up a completely new field of manufacturing. Indeed, it is shown that a spatially localized delivery of ALD precursors can generate materials patterns. In this "atomic-layer additive manufacturing" (ALAM), the vertical resolution of the solid structure deposited is about 0.1 nm, whereas the lateral resolution is defined by the microfluidic gas delivery. The ALAM principle is demonstrated by generating lines and patterns of pure, crystalline TiO2 and Pt on planar substrates and conformal coatings of 3D nanostructures. The functional quality of ALAM patterns is exemplified with temperature sensors, which achieve a performance similar to the industry standard. This general method of multimaterial direct patterning is much simpler than standard multistep lithographic microfabrication. It offers process flexibility, saves processing time, investment, materials, waste, and energy. It is envisioned that together with etching, doping, and cleaning performed in a similar local manner, ALAM will create the "atomic-layer advanced manufacturing" family of techniques.
Collapse
Affiliation(s)
- Ivan Kundrata
- ATLANT 3D Nanosystems, Kongens Lyngby, 2800, Denmark
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Chemistry of Thin Film Materials, IZNF, 91058, Erlangen, Germany
- Institute of Electrical Engineering, Slovak Academy of Sciences, Bratislava, 841 04, Slovakia
| | - Maïssa K S Barr
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Chemistry of Thin Film Materials, IZNF, 91058, Erlangen, Germany
| | - Sarah Tymek
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Chemistry of Thin Film Materials, IZNF, 91058, Erlangen, Germany
| | - Dirk Döhler
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Chemistry of Thin Film Materials, IZNF, 91058, Erlangen, Germany
| | - Boris Hudec
- Institute of Electrical Engineering, Slovak Academy of Sciences, Bratislava, 841 04, Slovakia
| | | | - Gabriel Vanko
- Institute of Electrical Engineering, Slovak Academy of Sciences, Bratislava, 841 04, Slovakia
| | - Marian Precner
- Institute of Electrical Engineering, Slovak Academy of Sciences, Bratislava, 841 04, Slovakia
| | - Tadahiro Yokosawa
- Friedrich-Alexander University of Erlangen-Nürnberg, Chair of Micro- and Nanostructure Research (IMN) and Center for Nanoanalysis and Electron Microscopy (CENEM), IZNF, 91058, Erlangen, Germany
| | - Erdmann Spiecker
- Friedrich-Alexander University of Erlangen-Nürnberg, Chair of Micro- and Nanostructure Research (IMN) and Center for Nanoanalysis and Electron Microscopy (CENEM), IZNF, 91058, Erlangen, Germany
| | | | - Karol Fröhlich
- Institute of Electrical Engineering, Slovak Academy of Sciences, Bratislava, 841 04, Slovakia
- Center for Advanced Materials Application, Slovak Academy of Sciences, Bratislava, 845 11, Slovakia
| | - Julien Bachmann
- ATLANT 3D Nanosystems, Kongens Lyngby, 2800, Denmark
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Chemistry of Thin Film Materials, IZNF, 91058, Erlangen, Germany
| |
Collapse
|
27
|
Bockstedte M, Xepapadeas AB, Spintzyk S, Poets CF, Koos B, Aretxabaleta M. Development of Personalized Non-Invasive Ventilation Interfaces for Neonatal and Pediatric Application Using Additive Manufacturing. J Pers Med 2022; 12:jpm12040604. [PMID: 35455720 PMCID: PMC9026706 DOI: 10.3390/jpm12040604] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/31/2022] [Accepted: 04/06/2022] [Indexed: 11/16/2022] Open
Abstract
The objective of this study was to present a methodology and manufacturing workflow for non-invasive ventilation interfaces (NIV) for neonates and small infants. It aimed to procure a fast and feasible solution for personalized NIV produced in-house with the aim of improving fit and comfort for the patient. Three-dimensional scans were obtained by means of an intraoral (Trios 3) and a facial scanner (3dMd Flex System). Fusion 360 3D-modelling software was employed to automatize the design of the masks and their respective casting molds. These molds were additively manufactured by stereolithography (SLA) and fused filament fabrication (FFF) technologies. Silicone was poured into the molds to produce the medical device. In this way, patient individualized oronasal and nasal masks were produced. An automated design workflow and use of additive manufacturing enabled a fast and feasible procedure. Despite the cost for individualization likely being higher than for standard masks, a user-friendly workflow for in-house manufacturing of these medical appliances proved to have potential for improving NIV in neonates and infants, as well as increasing comfort.
Collapse
Affiliation(s)
- Marit Bockstedte
- Department of Orthodontics, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery within the University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany; (A.B.X.); (B.K.); (M.A.)
- Correspondence:
| | - Alexander B. Xepapadeas
- Department of Orthodontics, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery within the University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany; (A.B.X.); (B.K.); (M.A.)
| | - Sebastian Spintzyk
- Section Medical Materials Science and Technology, University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany;
- ADMiRE Lab-Additive Manufacturing, Intelligent Robotics, Sensors and Engineering, School of Engineering and IT, Carinthia University of Applied Sciences, 9524 Villach, Austria
| | - Christian F. Poets
- Department of Neonatology, University Children’s Hospital, Calwerstr. 7, 72076 Tübingen, Germany;
| | - Bernd Koos
- Department of Orthodontics, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery within the University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany; (A.B.X.); (B.K.); (M.A.)
| | - Maite Aretxabaleta
- Department of Orthodontics, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery within the University Hospital Tübingen, Osianderstr. 2-8, 72076 Tübingen, Germany; (A.B.X.); (B.K.); (M.A.)
| |
Collapse
|
28
|
Main Applications and Recent Research Progresses of Additive Manufacturing in Dentistry. BIOMED RESEARCH INTERNATIONAL 2022; 2022:5530188. [PMID: 35252451 PMCID: PMC8894006 DOI: 10.1155/2022/5530188] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 12/16/2021] [Accepted: 01/28/2022] [Indexed: 12/13/2022]
Abstract
In recent ten years, with the fast development of digital and engineering manufacturing technology, additive manufacturing has already been more and more widely used in the field of dentistry, from the first personalized surgical guides to the latest personalized restoration crowns and root implants. In particular, the bioprinting of teeth and tissue is of great potential to realize organ regeneration and finally improve the life quality. In this review paper, we firstly presented the workflow of additive manufacturing technology. Then, we summarized the main applications and recent research progresses of additive manufacturing in dentistry. Lastly, we sketched out some challenges and future directions of additive manufacturing technology in dentistry.
Collapse
|
29
|
Paxton NC, Nightingale RC, Woodruff MA. Capturing patient anatomy for designing and manufacturing personalized prostheses. Curr Opin Biotechnol 2021; 73:282-289. [PMID: 34601260 DOI: 10.1016/j.copbio.2021.09.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 08/09/2021] [Accepted: 09/06/2021] [Indexed: 11/03/2022]
Abstract
Prostheses play a critical role in healthcare provision for many patients and encompass aesthetic facial prostheses, prosthetic limbs and prosthetic joints, bones, and other implantable medical devices in musculoskeletal surgery. An increasingly important component in cutting-edge healthcare treatments is the ability to accurately capture patient anatomy in order to guide the manufacture of personalized prostheses. This article examines methods for capturing patient anatomy and discusses the degrees of personalization in medical manufacturing alongside a summary of current trends in scanning technology with a focus on identifying workflows for incorporating personalization into patient-specific products. Over the next decade, with increased harmonization of both personalization and automated prosthetic manufacturing will be the realization of improved patient compliance, satisfaction, and clinical outcomes.
Collapse
Affiliation(s)
- Naomi C Paxton
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), 60 Musk Ave, Kelvin Grove, QLD 4059, Australia
| | - Renee C Nightingale
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), 60 Musk Ave, Kelvin Grove, QLD 4059, Australia
| | - Maria A Woodruff
- Centre for Biomedical Technologies, Queensland University of Technology (QUT), 60 Musk Ave, Kelvin Grove, QLD 4059, Australia.
| |
Collapse
|
30
|
Spintzyk S, Brinkmeier S, Huettig F, Unkovskiy A. Bonding strength of 3D printed silicone and titanium retention magnets for maxillofacial prosthetics application. J Prosthodont Res 2021; 66:422-430. [PMID: 34545007 DOI: 10.2186/jpr.jpr_d_21_00019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To assess the bonding between conventional and additively manufactured silicone elastomers and cylindrical retention titanium magnets for anchorage of facial prostheses. METHODS The customized titanium retention magnets were embedded in conventional and additively produced silicone blocks without primer application (n = 20) and with two commercially available primers G611 (n = 20) and A304 (n = 20) applied onto the magnet surface. The pull out test was performed in the universal testing machine using 45° and 90° angulation and the pull out strength was measured for each group. Additionally the SEM images of the pulled out magnets' surface were obtained and the amount of residual silicone onto the magnet surface was quantified. RESULTS Significantly higher pull out strength values (p < 0.05) were revealed for 90° specimens (0.11 - 0.17 ± 0.01 N/mm2) compared to the 45° group (0.03 ± 0.02 N/mm2). The pull out test with primer revealed no significant differences between the G 611 and A 304 primers in the additive group. However, significantly (p < 0,05) higher values were observed for conventional specimens in the A304 group (1.10 ± 0.21 N/mm2) compared to the G611 group (0.59 ± 0.27 N/mm2). CONCLUSION The application of both used primers may be an acceptable technical option for the anchorage of retention titanium magnets in silicone facial prostheses, produced additively in a fully digital workflow.
Collapse
Affiliation(s)
- Sebastian Spintzyk
- Section Medical Materials Science and Technology, Tuebingen University Hospital, Tuebingen, Germany
| | - Sophia Brinkmeier
- Section Medical Materials Science and Technology, Tuebingen University Hospital, Tuebingen, Germany
| | - Fabian Huettig
- Department of Prosthodontics at the Centre of Dentistry, Oral Medicine, and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Tuebingen, Germany
| | - Alexey Unkovskiy
- Department of Prosthodontics, Geriartric Dentistry and Craniomandibular Disorders, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt - Universität zu Berlin, Berlin, Germany.,Department of Dental Surgery, Sechenov First Moscow State Medical University, Moscow, Russia
| |
Collapse
|
31
|
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.
Collapse
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
| |
Collapse
|
32
|
3D Printing of High Viscosity Reinforced Silicone Elastomers. Polymers (Basel) 2021; 13:polym13142239. [PMID: 34300996 PMCID: PMC8309234 DOI: 10.3390/polym13142239] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/01/2021] [Accepted: 07/02/2021] [Indexed: 11/16/2022] Open
Abstract
Recent advances in additive manufacturing, specifically direct ink writing (DIW) and ink-jetting, have enabled the production of elastomeric silicone parts with deterministic control over the structure, shape, and mechanical properties. These new technologies offer rapid prototyping advantages and find applications in various fields, including biomedical devices, prosthetics, metamaterials, and soft robotics. Stereolithography (SLA) is a complementary approach with the ability to print with finer features and potentially higher throughput. However, all high-performance silicone elastomers are composites of polysiloxane networks reinforced with particulate filler, and consequently, silicone resins tend to have high viscosities (gel- or paste-like), which complicates or completely inhibits the layer-by-layer recoating process central to most SLA technologies. Herein, the design and build of a digital light projection SLA printer suitable for handling high-viscosity resins is demonstrated. Further, a series of UV-curable silicone resins with thiol-ene crosslinking and reinforced by a combination of fumed silica and MQ resins are also described. The resulting silicone elastomers are shown to have tunable mechanical properties, with 100–350% elongation and ultimate tensile strength from 1 to 2.5 MPa. Three-dimensional printed features of 0.4 mm were achieved, and complexity is demonstrated by octet-truss lattices that display negative stiffness.
Collapse
|
33
|
Zare M, Ghomi ER, Venkatraman PD, Ramakrishna S. Silicone‐based biomaterials for biomedical applications: Antimicrobial strategies and 3D printing technologies. J Appl Polym Sci 2021. [DOI: 10.1002/app.50969] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Mina Zare
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering National University of Singapore Singapore Singapore
| | - Erfan Rezvani Ghomi
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering National University of Singapore Singapore Singapore
| | | | - Seeram Ramakrishna
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering National University of Singapore Singapore Singapore
| |
Collapse
|
34
|
Are Nano TiO2 Inclusions Improving Biocompatibility of Photocurable Polydimethylsiloxane for Maxillofacial Prosthesis Manufacturing? APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11093777] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
(1) Background: The development of a biocompatible material for direct additive manufacturing of maxillofacial extraoral prosthesis is still a challenging task. The aim of the present study was to obtain a photocurable PDMS, with nano TiO2 inclusions, for directly 3D printing of extraoral, maxillofacial prosthesis. The biocompatibility of the newly obtained nanocomposite was also investigated; (2) Methods: 2.5% (m/m) titania nanoparticles (TiO2) oxide anatase and a photoinitiator, benzophenone (BF) 4.5% were added to commercially available PDMS for maxillofacial soft prostheses manufacturing. The three different samples (PDMS, PDMS-BF and PDMS-BF-TiO2) were assessed by dielectric curing analysis (DEA) based on their viscosities and curing times. In vitro micronucleus test (MNvit) was performed for genotoxicity assessment and three concentrations of each compounds (2 mg/L, 4 mg/L and 8 mg/L) were tested in duplicate and compared to a control; (3) Results: The nanocomposite PDMS-BP-TiO2 was fully reticulated within a few minutes under UV radiation, according to the dielectric analysis. PDMS-BF-TiO2 nanocomposite showed the lowest degree of cyto- and genotoxicity; (4) Conclusions: In the limits of the present study, the proposed ex situ preparation of a PDMS-BP-TiO2 offers an easy, simple, and promising technique that could be successfully used for 3D printing medical applications.
Collapse
|
35
|
Suriboot J, Marmo AC, Ngo BKD, Nigam A, Ortiz-Acosta D, Tai BL, Grunlan MA. Amphiphilic, thixotropic additives for extrusion-based 3D printing of silica-reinforced silicone. SOFT MATTER 2021; 17:4133-4142. [PMID: 33735370 DOI: 10.1039/d1sm00288k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The ability to utilize extrusion-based, direct ink write (DIW) 3D printing to create silica-reinforced silicones with complex structures could expand their utility in industrial and biomedical applications. Sylgard 184, a common Pt-cure silicone, lacks the thixotropic behavior necessary for effective printing and its hydrophobicity renders cured structures susceptible to biofouling. Herein, we evaluated the efficacy of various PEO-silane amphiphiles (PEO-SAs) as thixotropic and surface modifying additives in Sylgard 184. Eight amphiphilic PEO-SAs of varying architecture (e.g. linear, star, and graft), crosslinkability, and PEO content were evaluated. Modified formulations were also prepared with additional amounts of silica filler, both hexamethyldisilazane (HMDS)-treated and dimethyldichlorosilane (DiMeDi)-treated types. Numerous PEO-SA modified silicone formulations demonstrated effective water-driven surface hydrophilicity that was generally diminished with the addition of HMDS-treated silica filler. While increased yield stress was observed for PEO-SA modified silicones with added HMDS-treated filler, none achieved the initial target for 3D printing (>1000 Pa). Only the formulations containing the DiMeDi-treated filler (17.3 wt%) were able to surpass this value. These formulations were then tested for their thixotropic properties and all surpassed the targets for recovered storage modulus (G') (>1000 Pa) and loss factor (<0.8). In particular, the triblock linear PEO-SA produced exceptionally high recovered G', low loss factor, and substantial water-driven restructuring to form a hydrophilic surface. Combined, these results demonstrate the potential of silicones modified with PEO-SA surface-modifying additives (SMAs) for extrusion-based, DIW 3D printing applications.
Collapse
Affiliation(s)
- Jakkrit Suriboot
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Alec C Marmo
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Bryan Khai D Ngo
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA.
| | - Aman Nigam
- Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
| | | | - Bruce L Tai
- Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843, USA
| | - Melissa A Grunlan
- Department of Biomedical Engineering, Texas A&M University, College Station, TX 77843, USA. and Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA and Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| |
Collapse
|
36
|
Three-Dimensional Printed Nasal Prostheses After Oncologic Rhinectomies: Workflow and Patients' Satisfaction. J Craniofac Surg 2021; 32:2297-2300. [PMID: 33840766 DOI: 10.1097/scs.0000000000007659] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
ABSTRACT Reconstructions after oncologic full-thickness rhinectomies are often deferred from the ablative surgery. Definitive silicone prostheses are usually not used for transitional rehabilitation, and therefore, patients may deal with major facial defects for a long time before reconstruction. The aim was to develop a time- and cost-effective digital workflow to three-dimensional print temporary nasal prostheses and to assess patients' satisfaction. This prospective study enrolled all consecutive patients after full thickness ablative surgery and deferred reconstruction, from May 2018 to October 2019, at a tertiary care academic institution. With a dedicated software, the pre- and postoperative scans were three-dimensional processed to create the prosthesis and they were directly printed in elastic transparent resin. A cross-sectional survey was conducted 4 months after the rehabilitation to assess patients' satisfaction regarding comfort, aesthetics, and security of the retaining system. Seven patients were enrolled and they were all rehabilitated using this workflow. Mean time of design was 2h48 (SD 40 minutes), and mean printing time was 5h18 (SD 1 hour). Mean cost of production was 753 U.S. Dollars (SD 144 U.S. Dollars). Median scores of the visual analog scales were 8 out of 10 for each topic with interquartile range of 4 to 7 for aesthetics, 7 to 9 for comfort, and 7 to 10 for security of the retaining system. It has shown its feasibility in terms of costs and time of production. Patients were satisfied and it can be considered as a mean to help patients to deal with treatment sequelaes before definitive reconstruction.
Collapse
|
37
|
Systematic Review of Clinical Applications of CAD/CAM Technology for Craniofacial Implants Placement and Manufacturing of Nasal Prostheses. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18073756. [PMID: 33916853 PMCID: PMC8038514 DOI: 10.3390/ijerph18073756] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/24/2021] [Accepted: 03/30/2021] [Indexed: 12/20/2022]
Abstract
The aim of this systematic review was to gather the clinical and laboratory applications of CAD/CAM technology for preoperative planning, designing of an attachment system, and manufacturing of nasal prostheses. According to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, an electronic search was carried out. Only human clinical studies involving digital planning for the rehabilitation of facial defects were included. A total of 21 studies were included with 23 patients, which were virtually planned through different planning software. The most common preoperative data for digital planning were CT scans in nine cases, CBCT in six cases, and laser scans in six cases. The reported planning softwares were Mimics in six cases, Geomagic Studio software in six cases, ZBrush in four cases, and Freeform plus software in four cases. Ten surgical templates were designed and printed to place 36 implants after digital planning, while post-operative assessment was done in two cases to check the accuracy of planned implants. Digital 3D planning software was reported for presurgical planning and craniofacial implants placement, fabrication of molds, designing of implants, designing of retentive attachments, and printing of silicone prostheses. Digital technology has been claimed to reduce the clinical and laboratory time; however, the equipment cost is still one of the limitations.
Collapse
|
38
|
Miechowicz S, Wojnarowska W, Majkut S, Trybulec J, Pijanka D, Piecuch T, Sochacki M, Kudasik T. Method of designing and manufacturing craniofacial soft tissue prostheses using Additive Manufacturing: A case study. Biocybern Biomed Eng 2021. [DOI: 10.1016/j.bbe.2021.05.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
|
39
|
Sparschu W, Larsen R, Katsoulis D. Direct Synthesis of Methyl Chlorosilanes from Pd-Mg-SiO 2 Substrates Using Mechanochemistry. Macromol Rapid Commun 2021; 42:e2000684. [PMID: 33599021 DOI: 10.1002/marc.202000684] [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: 11/13/2020] [Revised: 12/07/2020] [Indexed: 11/08/2022]
Abstract
The direct reaction of methyl chloride with magnesium and palladium infused silica substrates to synthesize methyl chlorosilanes is reported. First, high energy ball milling on solid Mg-SiO2 mixtures produces elemental silicon and MgO. When PdCl2 is infused into the mixture, after additional ball milling and high-temperature reduction under H2 , dipalladium silicide (Pd2 Si) is produced. The silicon of the Pd2 Si readily reacts with MeCl under Müller-Rochow reaction conditions, to produce methyl chlorosilanes at yield ratios analogous to those of the traditional process. The dominant product is Me2 SiCl2 (selectivity > 30%), followed by MeSiCl3 and Me3 SiCl, with minor amounts of the remaining chlorosilanes. Silicon conversion exceeds 20% for most of the substrates. The elemental palladium, which remains within the Pd-Mg-SiO2 contact mass is re-converted to Pd2 Si at the next H2 /high-temperature treatment and reacts again with MeCl to repeat the methyl chlorosilane production. In principle, the resulting cycle of the mechanochemically induced formation of Pd2 Si followed by the reaction with MeCl can be repeated until the starting SiO2 converts completely to methyl chlorosilanes.
Collapse
Affiliation(s)
- Wendy Sparschu
- Dow Silicones Corporation, 2200 W. Salzburg Rd, Auburn, MI, 49811, USA
| | - Robert Larsen
- Dow Silicones Corporation, 2200 W. Salzburg Rd, Auburn, MI, 49811, USA
| | | |
Collapse
|
40
|
Digital Workflow in Maxillofacial Prosthodontics—An Update on Defect Data Acquisition, Editing and Design Using Open-Source and Commercial Available Software. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11030973] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Background: A maxillofacial prosthesis, an alternative to surgery for the rehabilitation of patients with facial disabilities (congenital or acquired due to malignant disease or trauma), are meant to replace parts of the face or missing areas of bone and soft tissue and restore oral functions such as swallowing, speech and chewing, with the main goal being to improve the quality of life of the patients. The conventional procedures for maxillofacial prosthesis manufacturing involve several complex steps, are very traumatic for the patient and rely on the skills of the maxillofacial team. Computer-aided design and computer-aided manufacturing have opened a new approach to the fabrication of maxillofacial prostheses. Our review aimed to perform an update on the digital design of a maxillofacial prosthesis, emphasizing the available methods of data acquisition for the extraoral, intraoral and complex defects in the maxillofacial region and assessing the software used for data processing and part design. Methods: A search in the PubMed and Scopus databases was done using the predefined MeSH terms. Results: Partially and complete digital workflows were successfully applied for extraoral and intraoral prosthesis manufacturing. Conclusions: To date, the software and interface used to process and design maxillofacial prostheses are expensive, not typical for this purpose and accessible only to very skilled dental professionals or to computer-aided design (CAD) engineers. As the demand for a digital approach to maxillofacial rehabilitation increases, more support from the software designer or manufacturer will be necessary to create user-friendly and accessible modules similar to those used in dental laboratories.
Collapse
|
41
|
Dashti H, Rajati Haghi H, Nakhaei M, Kiamanesh E. A combined digital technique to fabricate an implant-retained auricular prosthesis for rehabilitation of hemifacial microsomia. J Prosthet Dent 2021; 127:807-810. [PMID: 33454119 DOI: 10.1016/j.prosdent.2020.11.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 11/17/2020] [Accepted: 11/17/2020] [Indexed: 11/24/2022]
Abstract
Implant-retained auricular prostheses provide an excellent treatment option with better retention and stability than a conventionally retained prosthesis. This article presents a technique for auricular reconstruction for a patient with misplaced implants. The scanning process combined the use of an intraoral scanner and a facial scanner to enhance accuracy in space management for different parts of the auricular prosthesis and to reduce sculpting time.
Collapse
Affiliation(s)
- Hossein Dashti
- Assistant Professor, Department of Prosthodontics School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamidreza Rajati Haghi
- Associate Professor, Department of Prosthodontics School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohammadreza Nakhaei
- Associate Professor, Department of Prosthodontics School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Ehsan Kiamanesh
- Graduate student, Resident of Prosthodontic, Department of Prosthodontics School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran.
| |
Collapse
|
42
|
Domingue D, Glenn NC, Vest A, White JR. Osseointegrated implant-retained auricular prosthesis constructed using cone-beam computed tomography and a prosthetically driven digital workflow: a case report. Clin Case Rep 2021; 9:37-45. [PMID: 33489131 PMCID: PMC7813007 DOI: 10.1002/ccr3.3386] [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: 04/20/2020] [Revised: 08/07/2020] [Accepted: 08/09/2020] [Indexed: 11/08/2022] Open
Abstract
Prosthetically driven workflows using CBCT, digital optical scanning, 3D-printed molds and frameworks, and dental implant component attachments to osseointegrated fixtures can produce anatomically accurate, esthetic, durable silicone ear replacements.
Collapse
Affiliation(s)
- Daniel Domingue
- Private PracticeImplantology and Restorative DentistryLafayetteLAUSA
| | | | | | | |
Collapse
|
43
|
DEMİRALP E, DOĞRU G, YILMAZ H. ADDITIVE MANUFACTURING (3D PRINTING) METHODS AND APPLICATIONS IN DENTISTRY. CLINICAL AND EXPERIMENTAL HEALTH SCIENCES 2020. [DOI: 10.33808/clinexphealthsci.786018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
44
|
Powell SK, Cruz RLJ, Ross MT, Woodruff MA. Past, Present, and Future of Soft-Tissue Prosthetics: Advanced Polymers and Advanced Manufacturing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2001122. [PMID: 32909302 DOI: 10.1002/adma.202001122] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 05/23/2020] [Indexed: 06/11/2023]
Abstract
Millions of people worldwide experience disfigurement due to cancers, congenital defects, or trauma, leading to significant psychological, social, and economic disadvantage. Prosthetics aim to reduce their suffering by restoring aesthetics and function using synthetic materials that mimic the characteristics of native tissue. In the 1900s, natural materials used for thousands of years in prosthetics were replaced by synthetic polymers bringing about significant improvements in fabrication and greater realism and utility. These traditional methods have now been disrupted by the advanced manufacturing revolution, radically changing the materials, methods, and nature of prosthetics. In this report, traditional synthetic polymers and advanced prosthetic materials and manufacturing techniques are discussed, including a focus on prosthetic material degradation. New manufacturing approaches and future technological developments are also discussed in the context of specific tissues requiring aesthetic restoration, such as ear, nose, face, eye, breast, and hand. As advanced manufacturing moves from research into clinical practice, prosthetics can begin new age to significantly improve the quality of life for those suffering tissue loss or disfigurement.
Collapse
Affiliation(s)
- Sean K Powell
- School of Mechanical, Medical and Process Engineering, Science and Engineering Faculty, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia
| | - Rena L J Cruz
- School of Mechanical, Medical and Process Engineering, Science and Engineering Faculty, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia
| | - Maureen T Ross
- School of Mechanical, Medical and Process Engineering, Science and Engineering Faculty, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia
| | - Maria A Woodruff
- School of Mechanical, Medical and Process Engineering, Science and Engineering Faculty, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia
| |
Collapse
|
45
|
Jacob S, Nair AB, Patel V, Shah J. 3D Printing Technologies: Recent Development and Emerging Applications in Various Drug Delivery Systems. AAPS PharmSciTech 2020; 21:220. [PMID: 32748243 DOI: 10.1208/s12249-020-01771-4] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 07/22/2020] [Indexed: 02/06/2023] Open
Abstract
The 3D printing is considered as an emerging digitized technology that could act as a key driving factor for the future advancement and precise manufacturing of personalized dosage forms, regenerative medicine, prosthesis and implantable medical devices. Tailoring the size, shape and drug release profile from various drug delivery systems can be beneficial for special populations such as paediatrics, pregnant women and geriatrics with unique or changing medical needs. This review summarizes various types of 3D printing technologies with advantages and limitations particularly in the area of pharmaceutical research. The applications of 3D printing in tablets, films, liquids, gastroretentive, colon, transdermal and intrauterine drug delivery systems as well as medical devices have been briefed. Due to the novelty and distinct features, 3D printing has the inherent capacity to solve many formulation and drug delivery challenges, which are frequently associated with poorly aqueous soluble drugs. Recent approval of Spritam® and publication of USFDA technical guidance on additive manufacturing related to medical devices has led to an extensive research in various field of drug delivery systems and bioengineering. The 3D printing technology could be successfully implemented from pre-clinical phase to first-in-human trials as well as on-site production of customized formulation at the point of care having excellent dose flexibility. Advent of innovative 3D printing machineries with built-in flexibility and quality with the introduction of new regulatory guidelines would rapidly integrate and revolutionize conventional pharmaceutical manufacturing sector.
Collapse
|
46
|
Shi B, Huang H. Computational technology for nasal cartilage-related clinical research and application. Int J Oral Sci 2020; 12:21. [PMID: 32719336 PMCID: PMC7385163 DOI: 10.1038/s41368-020-00089-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 07/03/2020] [Accepted: 07/06/2020] [Indexed: 02/05/2023] Open
Abstract
Surgeons need to understand the effects of the nasal cartilage on facial morphology, the function of both soft tissues and hard tissues and nasal function when performing nasal surgery. In nasal cartilage-related surgery, the main goals for clinical research should include clarification of surgical goals, rationalization of surgical methods, precision and personalization of surgical design and preparation and improved convenience of doctor-patient communication. Computational technology has become an effective way to achieve these goals. Advances in three-dimensional (3D) imaging technology will promote nasal cartilage-related applications, including research on computational modelling technology, computational simulation technology, virtual surgery planning and 3D printing technology. These technologies are destined to revolutionize nasal surgery further. In this review, we summarize the advantages, latest findings and application progress of various computational technologies used in clinical nasal cartilage-related work and research. The application prospects of each technique are also discussed.
Collapse
Affiliation(s)
- Bing Shi
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, 610041, Chengdu, China
| | - Hanyao Huang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Oral Maxillofacial Surgery, West China Hospital of Stomatology, Sichuan University, 610041, Chengdu, China.
| |
Collapse
|
47
|
Unkovskiy A, Wahl E, Huettig F, Keutel C, Spintzyk S. Multimaterial 3D printing of a definitive silicone auricular prosthesis: An improved technique. J Prosthet Dent 2020; 125:946-950. [PMID: 32680736 DOI: 10.1016/j.prosdent.2020.02.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 02/19/2020] [Accepted: 02/19/2020] [Indexed: 12/01/2022]
Abstract
Direct silicone printing has been reported for the manufacture of interim facial prostheses. The recent advancements in printing hardware have allowed for multimaterial simultaneous silicone printing with 4 nozzles. With this technology, an auricular prosthesis was printed with various grades of Shore hardness. A few analog steps, including polishing, sealing, coloring, and relining, resulted in an individualized prosthesis with a thin frontal margin and smooth transition into the adjacent tissue. It was considered a definitive treatment option.
Collapse
Affiliation(s)
- Alexey Unkovskiy
- Research Associate, Department of Prosthodontics at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Tuebingen, Germany; Department of Dental Surgery, Sechenov First Moscow State Medical University, Moscow, Russia.
| | - Eugen Wahl
- Dental Technician, Department of Prosthodontics at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Tuebingen, Germany
| | - Fabian Huettig
- Acting Deputy Head, Department of Prosthodontics at the Centre of Dentistry, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Tuebingen, Germany
| | - Constanze Keutel
- Assistant Medical Director and Head of Radiology Department at the Centre of Dentistry, Department of Oral and Maxillofacial Surgery, Oral Medicine and Maxillofacial Surgery with Dental School, Tuebingen University Hospital, Tübingen, Germany
| | - Sebastian Spintzyk
- Material Science Engineer, Medical Materials Science and Technology, Tuebingen University Hospital, Tuebingen, Germany
| |
Collapse
|
48
|
Cruz RLJ, Ross MT, Skewes J, Allenby MC, Powell SK, Woodruff MA. An advanced prosthetic manufacturing framework for economic personalised ear prostheses. Sci Rep 2020; 10:11453. [PMID: 32651436 PMCID: PMC7351946 DOI: 10.1038/s41598-020-67945-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Accepted: 05/07/2020] [Indexed: 12/02/2022] Open
Abstract
Craniofacial prostheses are commonly used to restore aesthetics for those suffering from malformed, damaged, or missing tissue. Traditional fabrication is costly, uncomfortable for the patient, and laborious; involving several hours of hand-crafting by a prosthetist, with the results highly dependent on their skill level. In this paper, we present an advanced manufacturing framework employing three-dimensional scanning, computer-aided design, and computer-aided manufacturing to efficiently fabricate patient-specific ear prostheses. Three-dimensional scans were taken of ears of six participants using a structured light scanner. These were processed using software to model the prostheses and 3-part negative moulds, which were fabricated on a low-cost desktop 3D printer, and cast with silicone to produce ear prostheses. The average cost was approximately $3 for consumables and $116 for 2 h of labour. An injection method with smoothed 3D printed ABS moulds was also developed at a cost of approximately $155 for consumables and labour. This contrasts with traditional hand-crafted prostheses which range from $2,000 to $7,000 and take around 14 to 15 h of labour. This advanced manufacturing framework provides potential for non-invasive, low cost, and high-accuracy alternative to current techniques, is easily translatable to other prostheses, and has potential for further cost reduction.
Collapse
Affiliation(s)
- Rena L J Cruz
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Maureen T Ross
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Jacob Skewes
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Mark C Allenby
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| | - Sean K Powell
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia.
| | - Maria A Woodruff
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD, Australia
| |
Collapse
|
49
|
Zhivago P, Turkyilmaz I. A comprehensive digital approach to enhance smiles using an intraoral optical scanner and advanced 3-D sculpting software. J Dent Sci 2020; 16:784-785. [PMID: 33854736 PMCID: PMC8025131 DOI: 10.1016/j.jds.2020.05.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 05/16/2020] [Indexed: 11/17/2022] Open
Affiliation(s)
| | - Ilser Turkyilmaz
- Corresponding author. New York University College of Dentistry, Department of Prosthodontics, 380 Second Avenue, Suite 302, New York, NY, 10010. USA.
| |
Collapse
|
50
|
McHutchion L, Aalto D. Simulation of tissue-prosthesis margin interface by using surface scanning and digital design for auricular prostheses. J Prosthet Dent 2020; 125:361-372. [PMID: 32336538 DOI: 10.1016/j.prosdent.2020.01.045] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 01/30/2020] [Accepted: 01/30/2020] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM One of the most challenging aspects of auricular prosthesis design and fabrication is ensuring that the prosthesis fits the patient through a range of head and facial movements. Techniques used in conventional prosthetic treatment pathways account for issues of prosthesis fit, but this challenge has not been fully addressed in emerging treatment pathways that use digital technology. PURPOSE The purpose of this clinical study was to develop and evaluate a digital workflow by using surface scan data and incorporating the simulation of tissue movement into the design of auricular prostheses that fit the participant through a range of facial movements. An iterative design process was used to develop a design workflow through a sequential case series of participants with auricular prostheses. MATERIAL AND METHODS Scan data were acquired from a case series of 5 participants with existing implant-retained auricular prostheses. An iterative design process was used to digitally design auricular prostheses that fit the participants through a range of jaw and facial movements. The fit, shape, and retention of the digitally designed and conventionally made prostheses were assessed and compared. Design considerations were identified and documented through the iterative design process. RESULTS A final design workflow was iteratively developed based on the 5 participants. The shapes of the digitally designed prostheses were well matched to nontreatment anatomy overall. Prosthesis fit was variable: Some digitally designed prostheses fit the participant intimately through a range of movements, and others experienced significant gaps between the margins and the tissues. CONCLUSIONS An iterative design process provided a method of working toward quality improvement. Although the final design workflow provides a generally successful method of manipulating scan data in the design of auricular prostheses, the prosthesis fit at the anterior margin during facial movements remains variable and requires further development to achieve a consistently acceptable solution.
Collapse
Affiliation(s)
- Lindsay McHutchion
- Anaplastologist, Institute for Reconstructive Sciences in Medicine, Edmonton, Canada; Graduate student, Department of Communication Sciences and Disorders, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada.
| | - Daniel Aalto
- Assistant Professor, Department of Communication Sciences and Disorders, Faculty of Rehabilitation Medicine, University of Alberta, Edmonton, Canada; Research Scientist, Institute for Reconstructive Sciences in Medicine, Edmonton, Canada
| |
Collapse
|