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Hatamleh MM, Hatamlah HM, Nuseir A. Maxillofacial prosthetics and digital technologies: Cross-sectional study of healthcare service provision, patient attitudes, and opinions. J Prosthodont 2024; 33:231-238. [PMID: 37218377 DOI: 10.1111/jopr.13718] [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: 03/27/2023] [Accepted: 05/18/2023] [Indexed: 05/24/2023] Open
Abstract
PURPOSE Digital technologies are continuously improving the accuracy and quality of maxillofacial prosthetics, but their impact on patients remains unclear. This cross-sectional study aimed to analyze the impact of facial prosthetics service provision, patients' perception, and digital technology on prostheses construction. MATERIALS AND METHODS All patients who presented for evaluation and management of facial defects between January 2021 and December 2021 at the ENT clinic were eligible for study enrollment. Patients requiring prosthetic reconstruction of their missing facial parts were included in the study. Forty-five questionnaires were delivered, inquiring about the patients' prosthetic demographics, prosthesis manufacture using 3D technologies, and their perceptions and attitudes. RESULTS A total of 37 patients responded (29 males, eight females; mean age 20.50 years). The congenital cause was the highest among other causes (p = 0.001) with auricular defects being the highest (p = 0.001). A total of 38 prostheses were constructed and 17 prostheses were retained by 36 craniofacial implants (p = 0.014). The auricular and orbital implants success rates were 97% and 25%, respectively. The implant locations were digitally planned pre-operatively. Digital 3D technologies of defect capture, data designing, and 3D modeling were used and perceived as helpful and comfortable (p = 0.001). Patients perceived their prosthesis as easy to handle, suited them, and they felt confident with it (p = 0.001). They wore it for more than 12 h daily (p = 0.001). They were not worried that it would be noticed, and found it comfortable and stable during various activities (p = 0.001). Implant-retained prosthesis patients were more satisfied with it, and found it easy to handle and stable (p = 0.001). CONCLUSIONS Congenital defects are the main cause of facial defects in the study country. The overall acceptance of maxillofacial prostheses was good, showing high patient perception and satisfaction. Ocular and implant-retained silicone prostheses are better handled, more stable, and the latter is more satisfying than traditional adhesive prostheses. Digital technologies save time and effort invested in manufacturing facial prostheses.
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Affiliation(s)
| | - Heba Mohammad Hatamlah
- Department of Hospital Management, Faculty of Business, Philadelphia University, Amman, Jordan
| | - Amjad Nuseir
- ENT Department, Faculty of Medicine, Jordan University of Science and Technology, Irbid, Jordan
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Peter M, Kanathila H, Bembalagi M, Santhosh VN, Vas R, Patil S, Roy TR, Monsy M, Gopu BN, Chindak S. An In Vitro Comparative Evaluation of Conventional and Novel Thymus vulgaris Derived Herbal Disinfectant Solutions against Pathogenic Biofilm on Maxillofacial Silicones and Its Impact on Color Stability. J Contemp Dent Pract 2023; 24:967-973. [PMID: 38317394 DOI: 10.5005/jp-journals-10024-3602] [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] [Indexed: 02/07/2024]
Abstract
AIM This study aims to assess the antimicrobial efficacy and impact on color stability of Thymus (T.) vulgaris solution compared to conventional disinfectants on maxillofacial silicones. MATERIALS AND METHODS Various solutions were evaluated, including T. vulgaris solutions at 5 and 10%, saline (control), chlorhexidine (4%), and soap water. The substrates were MDX4-4210 silicone elastomers, and the microorganisms tested were Candida (C.) albicans and Staphylococcus (S.) aureus. The viability of microorganisms was determined through an 3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide (MTT) reduction assay, and color stability was measured using a spectrophotometer with X-Rite Europe software. Statistical analysis was performed using the Kruskal-Wallis test, Mann-Whitney U post hoc test, and Wilcoxon Signed Rank test. RESULTS Soap water demonstrated superior disinfectant action against both microorganisms, while T. vulgaris solutions at 5 and 10% exhibited comparable antimicrobial efficacy. Chlorhexidine and 10% T. vulgaris solution showed minimal color changes in the silicone material. In contrast, soap water and the 5% T. vulgaris solution resulted in clinically unacceptable color alterations. CONCLUSION This study underscores the potential of T. vulgaris as an herbal disinfectant for combating microbial biofilms on maxillofacial silicones, particularly at concentrations of 5 and 10%. The importance of maintaining color stability is emphasized, with Chlorhexidine and the 10% T. vulgaris solution demonstrating effective preservation of esthetics. These findings suggest the viability of considering T. vulgaris as an alternative disinfectant in clinical settings for maxillofacial silicone prostheses. CLINICAL SIGNIFICANCE Maxillofacial silicones are vital in restoring aesthetic features for individuals with facial trauma, congenital deformities, or post-surgical interventions. Yet, biofilm-related infections jeopardize their durability and visual integrity. Clinically, T. vulgaris signifies a potential advance in prosthodontic care, offering valuable insights for improving antimicrobial performance and aesthetic durability in maxillofacial prostheses. How to cite this article: Peter M, Kanathila H, Bembalagi M, et al. An In Vitro Comparative Evaluation of Conventional and Novel Thymus vulgaris Derived Herbal Disinfectant Solutions against Pathogenic Biofilm on Maxillofacial Silicones and Its Impact on Color Stability. J Contemp Dent Pract 2023;24(12):967-973.
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Affiliation(s)
- Meekha Peter
- Department of Prosthodontics, KLE Vishwanath Katti Institute of Dental Sciences & Hospital, KLE Academy of Higher Education and Research (KLE University), Belagavi, Karnataka, India, Orcid: https://orcid.org/0000-0001-7509-4070
| | - Hema Kanathila
- Department of Prosthodontics, KLE Vishwanath Katti Institute of Dental Sciences & Hospital, KLE Academy of Higher Education and Research (KLE University), Belagavi, Karnataka, India, Orcid: https://orcid.org/0000-0002-5876-1377
| | - Mahantesh Bembalagi
- Department of Public Health Dentistry, KLE Vishwanath Katti Institute of Dental Sciences & Hospital, KLE Academy of Higher Education and Research (KLE University), Belagavi, Karnataka, India, Orcid: https://orcid.org/0000-0002-2809-7313
| | - Varkey Nadakkavukaran Santhosh
- Department of Public Health Dentistry, Department of Prosthodontics, KLE Vishwanath Katti Institute of Dental Sciences & Hospital, KLE Academy of Higher Education and Research (KLE University), Belagavi, Karnataka, India, Phone: +91 9108858449, e-mail: , Orcid: https://orcid.org/0000-0001-9197-2646
| | - Rhea Vas
- Department of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, United Kingdom, Orcid: https://orcid.org/0000-0003-4401-5696
| | - Suvidha Patil
- Department of Prosthodontics, KLE Vishwanath Katti Institute of Dental Sciences & Hospital, KLE Academy of Higher Education and Research (KLE University), Belagavi, Karnataka, India
| | - Treasa Richa Roy
- Department of Prosthodontics, KLE Vishwanath Katti Institute of Dental Sciences & Hospital, KLE Academy of Higher Education and Research (KLE University), Belagavi, Karnataka, India
| | - Mibin Monsy
- JSS Dental College and Hospital, Mysuru, India
| | | | - Shreya Chindak
- Department of Prosthodontics, KLE Vishwanath Katti Institute of Dental Sciences & Hospital, KLE Academy of Higher Education and Research (KLE University), Belagavi, Karnataka, India
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Maqableh AM, Hatamleh MM. Cohesive Zone Modeling of Pull-Out Test for Dental Fiber-Silicone Polymer. Polymers (Basel) 2023; 15:3668. [PMID: 37765521 PMCID: PMC10538124 DOI: 10.3390/polym15183668] [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: 08/02/2023] [Revised: 09/02/2023] [Accepted: 09/03/2023] [Indexed: 09/29/2023] Open
Abstract
BACKGROUND Several analytical methods for the fiber pull-out test have been developed to evaluate the bond strength of fiber-matrix systems. We aimed to investigate the debonding mechanism of a fiber-silicone pull-out specimen and validate the experimental data using 3D-FEM and a cohesive element approach. METHODS A 3D model of a fiber-silicone pull-out testing specimen was established by pre-processing CT images of the typical specimen. The materials on the scans were posted in three different cross-sectional views using ScanIP and imported to ScanFE in which 3D generation was implemented for all of the image slices. This file was exported in FEA format and was imported in the FEA software (PATRAN/ABAQUS, version r2) for generating solid mesh, boundary conditions, and material properties attribution, as well as load case creation and data processing. RESULTS The FEM cohesive zone pull-out force versus displacement curve showed an initial linear response. The Von Mises stress concentration was distributed along the fiber-silicone interface. The damage in the principal stresses' directions S11, S22, and S33, which represented the maximum possible magnitude of tensile and compressive stress at the fiber-silicone interface, showed that the stress is higher in the direction S33 (stress acting in the Z-direction) in which the lower damage criterion was higher as well when compared to S11 (stress acting in the XY plane) and S23 (stress acting in the YZ plane). CONCLUSIONS The comparison between the experimental values and the results from the finite element simulations show that the proposed cohesive zone model accurately reproduces the experimental results. These results are considered almost identical to the experimental observations about the interface. The cohesive element approach is a potential function that takes into account the shear effects with many advantages related to its ability to predict the initiation and progress of the fiber-silicone debonding during pull-out tests. A disadvantage of this approach is the computational effort required for the simulation and analysis process. A good understanding of the parameters related to the cohesive laws is responsible for a successful simulation.
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Affiliation(s)
- Ayman M. Maqableh
- School of Electro-Mechanical Engineering, Luminus Technical University College (LTUC), Amman 11118, Jordan
| | - Muhanad M. Hatamleh
- Faculty of Applied Medical Science, Allied Dental Sciences Department, Jordan University of Science and Technology (JUST), Irbid 22110, Jordan;
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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 .
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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
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Gupta D, Thakkur R, Shah B. A case report on implant retained auricular prosthesis: Bringing back hope and smile. Natl J Maxillofac Surg 2023; 14:152-156. [PMID: 37273440 PMCID: PMC10235729 DOI: 10.4103/njms.njms_441_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 01/03/2022] [Accepted: 06/03/2022] [Indexed: 06/06/2023] Open
Abstract
Long-term success of a facial prosthesis mainly depends on retention. Most articles relate tissue health to long-term success, not retention. Anatomic undercuts, skin adhesives and implants are important factors to provide sufficient retention. Extra oral implant retained prosthesis have been proven to be a predictable treatment option for maxillofacial rehabilitation. This case report describes the clinical and laboratory procedures for fabricating implant-retained auricular prosthesis using magnets for retention. It describes how an initial planning for implant placement with Hader-bar retentive system was opted out due to intra-surgical situation. The use of craniofacial implants for retention of extra oral prosthesis, such as ears, offers excellent support and retentive abilities and improves a patient's appearance and quality of life. It has been shown in clinical and biomechanical studies that two implants are sufficient to retain an auricular prosthesis. Judicial treatment planning and implant placement according to the available remaining structures is prudent for a successful prosthesis.
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Affiliation(s)
- Deeksha Gupta
- Department of Prosthodontics, MP Dental College and Hospital, Vadodara, Gujarat, India
| | - Rahul Thakkur
- Department of Prosthodontics, MP Dental College and Hospital, Vadodara, Gujarat, India
| | - Bhumi Shah
- Department of Prosthodontics, MP Dental College and Hospital, Vadodara, Gujarat, India
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6
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Facial Scanning and Additive Manufacturing Used in Production Nasal Prosthesis. J Craniofac Surg 2022; 33:e762-e764. [PMID: 36100965 DOI: 10.1097/scs.0000000000008712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 03/17/2022] [Indexed: 11/26/2022] Open
Abstract
Maxillofacial prosthesis is an effective treatment for patients with facial sequelae, but it remains challenging for professionals due to its high esthetic complexity. This study describes a clinical case of successful nasal prosthetic rehabilitation using digital technology and additive manufacturing. Initially, the 76-year-old patient, with a facial defect in the nasal region, had her face scanned with 3-dimensional scanner for laboratory planning of the prototype of a nasal prosthesis. After approving the prototype image, working models in muffle shape were obtained in additive manufacture for the inclusion of the prosthesis. In the final session, the prosthesis was colored extrinsically and installed. The procedures digital in the manufacture of the facial prosthesis was applicable and agile, allowing the professional greater predictability regarding the shape of the rehabilitated organ, esthetic improvement in the mutilated area and patient satisfaction in relation to the speed, of the procedure and the quality of the prosthesis.
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7
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Jablonski RY, Veale BJ, Coward TJ, Keeling AJ, Bojke C, Pavitt SH, Nattress BR. Outcome measures in facial prosthesis research: A systematic review. J Prosthet Dent 2021; 126:805-815. [PMID: 33581868 PMCID: PMC8664412 DOI: 10.1016/j.prosdent.2020.09.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 09/21/2020] [Accepted: 09/21/2020] [Indexed: 11/25/2022]
Abstract
STATEMENT OF PROBLEM Facial prosthesis research uses a wide variety of outcome measures, which results in challenges when comparing the effectiveness of interventions among studies. Consensus is lacking regarding the most appropriate and meaningful outcome measures to use in facial prosthesis research to capture important perspectives. PURPOSE The purpose of the systematic review was to identify and synthesize outcome measures used in facial prosthesis research. MATERIAL AND METHODS Electronic searches were performed in 11 databases (including nonpeer-reviewed literature). The citations were searched, and expert societies were contacted to identify additional studies. Inclusion criteria comprised studies of participants with facial defects who required or had received prosthetic rehabilitation with an external facial prosthesis. Exclusion criteria comprised participants with ocular prostheses, case reports, case series with fewer than 5 participants, laboratory-based studies, and studies published before 1980. Study selection was performed independently by 2 reviewers. Discrepancies were resolved through discussion or by a third reviewer. Outcome measures were synthesized with a categorization approach based on the perspective, theme, and subtheme of the outcome measures. Quality assessment was performed with an appraisal tool that enabled evaluation of studies with diverse designs. RESULTS Database searching identified 13 058 records, and 7406 remained after duplications were removed. After initial screening, 189 potentially relevant records remained, and 186 full texts were located (98% retrieval rate). After full-text screening, 124 records were excluded. Citation searches and contact with expert societies identified 4 further records. In total, 69 articles (grouped into 65 studies) were included. Studies were categorized as per the perspective of their outcome measures, with the following findings: patient-reported (74% of studies), clinical indicators (34%), clinician-reported (8%), multiple viewpoints (6%), and independent observer-reported (3%). Patient-reported outcome measures included tools to assess satisfaction, quality of life, and psychologic health. Variability in the choice of outcome measures was evident among the studies, with many self-designed, unvalidated, condition-specific questionnaires reported. A greater number of outcome measure themes emerged over time; themes such as service delivery and health state utility have recently been evaluated. CONCLUSIONS Over the past 40 years, facial prosthesis research has focused on patient-reported outcome measures. Outcome measures relating to other perspectives have been used less frequently, although new themes appear to be emerging in the literature. Future research should use outcome measures with appropriate measurement properties for use with facial prosthetics.
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Affiliation(s)
- Rachael Y Jablonski
- Specialty Registrar in Restorative Dentistry and NIHR Doctoral Fellow, Department of Restorative Dentistry, School of Dentistry, University of Leeds, Leeds, UK.
| | - Benjamin J Veale
- Medical Student, Hull York Medical School, University of York, York, UK
| | - Trevor J Coward
- Reader 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, UK
| | - Andrew J Keeling
- Clinical Associate Professor, Department of Restorative Dentistry, School of Dentistry, University of Leeds, Leeds, UK
| | - Chris Bojke
- Professor of Health Economics, Academic Unit of Health Economics, School of Medicine, University of Leeds, Leeds, UK
| | - Sue H Pavitt
- Professor of Translational and Applied Health Research, Dental Translational and Clinical Research Unit, School of Dentistry, University of Leeds, Leeds, UK
| | - Brian R Nattress
- Clinical Professor and Honorary Consultant, Department of Restorative Dentistry, School of Dentistry, University of Leeds, Leeds, UK
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Canallatos P, Jayanetti J, Beumer J. An implant-retained auricular prosthesis complicated by a modified temporal bone resection. J Prosthet Dent 2021; 128:1375-1379. [PMID: 33879317 DOI: 10.1016/j.prosdent.2021.02.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 02/16/2021] [Accepted: 02/17/2021] [Indexed: 10/21/2022]
Abstract
A patient underwent a modified temporal bone resection and total auriculectomy to remove a sebaceous carcinoma arising from the tragus of the right auricle that extended into the external auditory meatus. Because the tumor extended into the temporal bone, the osseous sites originally selected for immediate placement of the craniofacial implants were resected and no longer available. Subsequently, after an appropriate period of healing, implants were placed into the residual temporal bone, considerably more superior and posterior to the external auditory meatus such that they emerged through hair-bearing skin. The purpose of this report was to describe the fabrication of an implant-retained auricular prosthesis with implants in suboptimal positions. Challenges included optimization of the stability and retention of the prosthesis, effectively managing the prosthetic space without compromising the esthetic outcome, providing adequate hygiene access for the implant connecting bar, and maintaining the health of the peri-implant tissues when the implant emerged through hair-bearing skin.
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Affiliation(s)
- Paul Canallatos
- Fellow, Maxillofacial Prosthetics Fellowship, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, Calif; Maxillofacial Prosthodontist, Department of Oral Oncology and Maxillofacial Prosthetics, Erie County Medical Center, Buffalo, NY.
| | - Jay Jayanetti
- Associate Director of Maxillofacial Prosthetics, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, Calif
| | - John Beumer
- Professor Emeritus, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, Calif
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9
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Successful prosthetic salvage of a suboptimal autogenous auricular reconstruction with digital technologies: A report of 3 challenging treatments. J Prosthet Dent 2021; 128:1103-1108. [PMID: 33795159 DOI: 10.1016/j.prosdent.2021.02.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 11/23/2022]
Abstract
The surgical reconstruction of congenitally missing or malformed ears is challenging and involves complicated surgeries. Ear shape, position, and skin color will likely be compromised in patients with relative anatomic symmetry, and it is easier to reproduce these features with a prosthesis. This article describes the prosthetic reconstruction of 3 patients who had received failed or suboptimal surgical reconstruction of their missing or deformed ears. Challenging characteristics included limited soft-tissue availability, skeletal hypoplasia with prominent concavity defect, and bilaterally missing ears with abnormally low hairline. Three-dimensional planning using a software program was used to determine the ideal implant locations and mirror the contralateral ear. The mirrored ear was 3-dimensionally printed with a stereolithography printer. The skin color was reproduced digitally by using the Spectromatch Pro system.
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10
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Çevik P. Evaluation of Shore A hardness of maxillofacial silicones: the effect of dark storage and nanoparticles. Eur Oral Res 2019; 52:99-104. [PMID: 30775710 DOI: 10.26650/eor.2018.469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 07/17/2017] [Accepted: 07/25/2017] [Indexed: 01/13/2023] Open
Abstract
Purpose Little has been reported how the addition of nanoparticles could affect the hardness of maxillofacial silicones. The purpose of this study was to evaluate the effects of different types of nanoparticle additives and dark storage for 2-years on the Shore A hardness of two types of maxillofacial silicone elastomers. Materials and Methods A-2000 and A-2006 Room Temperature Vulcanized (RTV) silicone elastomers were tested in this study. Silaned silica, fumed silica and titanium dioxide nanoparticles at concentrations of 10% by volume were used as fillers for the maxillofacial silicone elastomers. A total of 64 silicone specimens were fabricated, which includes 8 samples, 30 × 10 mm in size, from each silicone elastomers for each subgroup and also controls. After the initial Shore A hardness measurements, specimens were kept in dark conditions at room temperature for 2 years. The final measurements were then taken from the silicone specimens. All data were statistically analyzed. Results For both types of silicones, there was statistically significant differences among study groups (p<0.001). Fumed silica group showed the lowest hardness values in A-2000 after storage. However, no significant difference was observed between control and fumed silica groups. Control group showed the lowest hardness values in A-2006, while the highest hardness values were found in fumed silica group; there was no significant difference between silica and silane groups. Conclusion Shore A values of the specimens were within the acceptable range for the maxillofacial silicones after aging. Nanoparticle addition did not prevent hardening of the silicone elastomers with time.
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Affiliation(s)
- Pınar Çevik
- Department of Prosthodontics, Gazi University Faculty of Dentistry, Ankara, Turkey
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11
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Nuseir A, Hatamleh MM, Alnazzawi A, Al-Rabab'ah M, Kamel B, Jaradat E. Direct 3D Printing of Flexible Nasal Prosthesis: Optimized Digital Workflow from Scan to Fit. J Prosthodont 2018; 28:10-14. [PMID: 30461125 DOI: 10.1111/jopr.13001] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/14/2018] [Indexed: 01/28/2023] Open
Abstract
A maxillofacial prosthesis is a successful treatment modality to restore missing facial parts. Digital technologies and 3D printing are employed in constructing facial prostheses such as ears; however, their application is still partial, and final prostheses are usually manufactured conventionally using stone molds. This report aims to introduce a complete digital workflow to construct a nasal prosthesis and compare it to the conventional workflow of a patient requiring a nasal prosthesis. A computer tomography scan showing the defect was exported to specialized software to create 3D reconstructions of the patient's face and underlying bone. The nose was digitally designed restoring facial esthetics, anatomy, shape, and skin color. Different skin tones were digitally matched to skin tissues adjacent to the defect area using the Spectromatch system. The design was 3D printed in flexible and colorful material at 16 μm resolution using a 3D printer. External color pigmentations were applied to the nose for optimum esthetics, and the prosthetic nose was sealed in silicone and left to heat polymerize for 15 minutes. The prosthetic nose was retained in place using biomedical adhesive, and the patient was pleased with it. This report proposes a complete digital workflow to directly design and fabricate a prosthetic nose of acceptable esthetics. Such a workflow can lead to enhanced prosthesis reproducibility and acceptability and may become an effective treatment option for treatment of patients with facial defects.
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Affiliation(s)
- Amjad Nuseir
- Faculty of Medicine, Jordan University of Science and Technology, King Abdullah University Hospital, Irbid, Jordan
| | - Muhanad Moh'd Hatamleh
- Oral and Maxillofacial Surgery Department, King's College Hospital NHS Foundation Trust, London, UK.,Luminous Technical University College, Amman, Jordan
| | - Ahmad Alnazzawi
- Department of Substitutive Dental Science, Faculty of Dentistry, Taibah University, Madinah, Saudi Arabia
| | - Mohammad Al-Rabab'ah
- University of Jordan, School of Dentistry, Amman, Jordan.,University of Liverpool, School of Dentistry, Liverpool, UK
| | - Belal Kamel
- Plastic Surgery Specialist, Nour Clinic, Cairo, Egypt
| | - Esraa Jaradat
- Department of Allied Dental Sciences, Faculty of Applied Medical Sciences, Jordan University of Science and Technology, Irbid, Jordan
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Ferreira A, Aras M, Chitre V, Coutinho I, Rajagopal P. Effect of the simulated Indian and Mediterranean climates on the Shore A hardness of maxillofacial silicone. J Indian Prosthodont Soc 2018; 18:305-313. [PMID: 30449958 PMCID: PMC6180737 DOI: 10.4103/jips.jips_197_18] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Accepted: 08/06/2018] [Indexed: 11/05/2022] Open
Abstract
Purpose: The purpose of this study was to assess and compare the effect of the simulated Indian and Mediterranean climates on the Shore A hardness of a commercially available nonpigmented room temperature vulcanizing maxillofacial silicone. Materials and Methods: Sixty specimens were fabricated from A-2000 silicone material (Factor II), using a stainless steel mold of dimension 20 mm × 2 mm. The initial Shore A hardness was noted using a digital durometer. Thirty samples were subjected to the simulated Mediterranean climate (Group I), and the remaining thirty samples were subjected to the Indian tropical climate (Group II) in an accelerated weather chamber to simulate 1 year of clinical use. Final Shore A hardness was noted. A one-way ANOVA and Bonferroni post hoc tests were performed for the Shore A hardness at P < 0.05. Results: The mean initial Shore A hardness for both the groups was 24.9833. After accelerated weathering, Group I showed mean Shore A hardness of 33.0000 whereas Group II showed mean Shore A hardness of 38.0000. Conclusions: The Shore A hardness of Factor II, before and after accelerated artificial weathering, was statistically significant at 0.05 level (P < 0.05). The change in Shore A hardness was greater in the simulated tropical climate group (Group II) as compared to the simulated Mediterranean climate group (Group I) but within clinical limits.
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Affiliation(s)
- Amanda Ferreira
- Department of Prosthodontics and Crown & Bridge, Goa Dental College and Hospital, Bambolim, Goa, India
| | - Meena Aras
- Department of Prosthodontics and Crown & Bridge, Goa Dental College and Hospital, Bambolim, Goa, India
| | - Vidya Chitre
- Department of Prosthodontics and Crown & Bridge, Goa Dental College and Hospital, Bambolim, Goa, India
| | - Ivy Coutinho
- Department of Prosthodontics and Crown & Bridge, Goa Dental College and Hospital, Bambolim, Goa, India
| | - Praveen Rajagopal
- Department of Prosthodontics and Crown & Bridge, Goa Dental College and Hospital, Bambolim, Goa, India
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Rahman AM, Jamayet NB, Nizami MMUI, Johari Y, Husein A, Alam MK. Effect of Aging and Weathering on the Physical Properties of Maxillofacial Silicone Elastomers: A Systematic Review and Meta-Analysis. J Prosthodont 2018; 28:36-48. [DOI: 10.1111/jopr.12950] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/29/2018] [Indexed: 02/06/2023] Open
Affiliation(s)
- Ahmed Mushfiqur Rahman
- Maxillofacial Prosthetic Service, School of Dental Sciences; Universiti Sains Malaysia; Kelantan Malaysia
| | - Nafij Bin Jamayet
- Maxillofacial Prosthetic Service, School of Dental Sciences; Universiti Sains Malaysia; Kelantan Malaysia
| | - Md Minhaz Ul Islam Nizami
- Maxillofacial Prosthetic Service, School of Dental Sciences; Universiti Sains Malaysia; Kelantan Malaysia
| | - Yanti Johari
- Prosthodontic Unit, School of Dental Sciences; Universiti Sains Malaysia; Kelantan Malaysia
| | - Adam Husein
- Prosthodontic Unit, School of Dental Sciences; Universiti Sains Malaysia; Kelantan Malaysia
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14
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Mechanical and Morphological Effect of Plant Based Antimicrobial Solutions on Maxillofacial Silicone Elastomer. MATERIALS 2018; 11:ma11060925. [PMID: 29848959 PMCID: PMC6025512 DOI: 10.3390/ma11060925] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Revised: 05/25/2018] [Accepted: 05/25/2018] [Indexed: 11/29/2022]
Abstract
The objective of this study was to determine the effect of plant based antimicrobial solutions specifically tea tree and Manuka oil on facial silicone elastomers. The purpose of this in vitro study was to evaluate the effect of disinfection with plant extract solution on mechanical properties and morphology on the silicone elastomer. Test specimens were subjected to disinfection using tea tree oil, Manuka oil and the staphylococcus epidermidis bacteria. Furthermore, a procedure duration was used in the disinfection process to simulate up to one year of usage. Over 500 test specimens were fabricated for all tests performed namely hardness, elongation, tensile, tear strength tests, visual inspection and lastly surface characterization using SEM. A repeated measures ANOVA revealed that hardness and elongation at break varied significantly over the time period, whereas this was not observed in the tear and tensile strength parameters of the test samples.
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15
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Farah A, Sherriff M, Coward T. Color stability of nonpigmented and pigmented maxillofacial silicone elastomer exposed to 3 different environments. J Prosthet Dent 2018; 120:476-482. [PMID: 29627205 DOI: 10.1016/j.prosdent.2017.11.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 11/14/2017] [Accepted: 11/14/2017] [Indexed: 10/17/2022]
Abstract
STATEMENT OF PROBLEM The color degradation of maxillofacial prostheses in clinical service requires their frequent renewal. How different materials compare is unclear. PURPOSE The purpose of this in vitro study was to investigate the color stability of a nonpigmented and pigmented maxillofacial silicone when stored in darkness and exposed to accelerated aging in a weathering chamber and natural outdoor weathering. MATERIAL AND METHODS M511 elastomer was colored with Spectromatch Pro colorants, stored in darkness, and exposed to accelerated aging and natural outdoor weathering for 1500 hours. Test groups included nonpigmented specimens (n=18), individually pigmented specimens (n=90), and Caucasian skin tone-colored specimens (n=18). The CIELab values of the test specimens were measured using the CM-2600d spectrophotometer (Konica Minolta Sensing) at base line (0 hours) and then every 100 hours up to 1500 hours of aging. Color changes (ΔE) were calculated based on the recorded CIELab values. All data were analyzed by using linear mixed models and the Šídák multiple comparison of means test (α=.05). RESULTS A significant effect of time was found on the ΔE of all test specimens in all environments (P=.001). All pigmented M511 specimens demonstrated good color stability with maximum ΔE below the acceptability threshold of 2 ΔE when stored in darkness and exposed to outdoor weathering. However, nonpigmented specimens crossed this acceptability threshold when exposed to outdoor weathering with maximum ΔE values of 3.65. The greatest color changes were observed for all specimens when exposed to accelerated aging and most exceeded the acceptability threshold. Nonpigmented (ΔE, 4.86) and Indian yellow (ΔE, 5.20) demonstrated the highest color changes after 1500 hours. CONCLUSIONS All environments resulted in visible color changes of nonpigmented and pigmented M511 elastomer. The lowest ΔE values were observed for specimens stored in darkness and the greatest for specimens exposed to accelerated aging. The organic pigment Logwood maroon demonstrated the best color stability with maximum ΔE values below the perceptibility threshold (PT) of 1 ΔE.
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Affiliation(s)
- Ariane Farah
- Doctoral student, Academic Centre for Reconstructive Science, King's College London, Guy's Hospital, London, United Kingdom
| | - Martyn Sherriff
- Visiting Professor, School of Oral and Dental Sciences, University of Bristol, Bristol, United Kingdom
| | - Trevor Coward
- Reader/Consultant, Academic Centre for Reconstructive Science, King's College London, Guy's Hospital, London, United Kingdom.
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16
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Jablonski RY, Osnes CA, Khambay BS, Nattress BR, Keeling AJ. An in-vitro study to assess the feasibility, validity and precision of capturing oncology facial defects with multimodal image fusion. Surgeon 2017; 16:265-270. [PMID: 29275932 DOI: 10.1016/j.surge.2017.11.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 11/15/2017] [Accepted: 11/30/2017] [Indexed: 10/18/2022]
Abstract
AIM Assess the feasibility, validity and precision of multimodal image fusion to capture oncology facial defects based on plaster casts. METHODS Ten casts of oncology facial defects were acquired. To create gold standard models, a 3D volumetric scan of each cast was obtained with a cone beam computed tomography (CBCT) scanner (NewTomVG). This was converted into surface data using open-source medical segmentation software and cropped to produce a CBCT mask using an open-source system for editing meshes. For the experimental model, the external facial features were captured using stereophotogrammetry (DI4D) and the defect was recorded with a custom optical structured light scanner. The two meshes were aligned, merged and resurfaced using MeshLab to produce a fused model. Analysis was performed in MeshLab on the best fit of the fused model to the CBCT mask. The unsigned mean distance was used to measure the absolute deviation of each model from the CBCT mask. To assess the precision of the technique, the process of producing the fused model was repeated to create five models each for the casts representing the best, middle and worst results. RESULTS Global mean deviation was 0.22 mm (standard deviation 0.05 mm). The precision of the method appeared to be acceptable although there was variability in the location of the error for the worst cast. CONCLUSION This method for merging two independent scans to produce a fused model shows strong potential as an accurate and repeatable method of capturing facial defects. Further research is required to explore its clinical use.
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Affiliation(s)
| | - Cecilie A Osnes
- Leeds School of Dentistry, Clarendon Way, University of Leeds, LS2 9LU, UK
| | - Balvinder S Khambay
- Leeds School of Dentistry, Clarendon Way, University of Leeds, LS2 9LU, UK; Birmingham School of Dentistry, 5 Mill Pool Way, Birmingham, B5 7EG, UK
| | - Brian R Nattress
- Leeds School of Dentistry, Clarendon Way, University of Leeds, LS2 9LU, UK
| | - Andrew J Keeling
- Leeds School of Dentistry, Clarendon Way, University of Leeds, LS2 9LU, UK
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17
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Dudley J, Mughal F, Hotinski E, Mahmud M. Prosthodontic management of maxillofacial cases: a case series. Aust Dent J 2017; 63:124-128. [PMID: 28853144 DOI: 10.1111/adj.12563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/23/2017] [Indexed: 11/29/2022]
Abstract
Maxillofacial prosthetics is an important and recognized sub-discipline of prosthodontics that forms a key component of postgraduate training programmes. General dentists have a role to play in the management of maxillofacial defect patients even though treatment usually requires a multidisciplinary approach in an institutional environment. Maxillofacial prosthetic cases frequently present with complex histories but simple patient goals. The conservatively managed implant-retained auricular prosthesis, speech aid prosthesis and orbital prosthesis cases described in this report were completed in a postgraduate clinical residency program and highlight the intrinsic complexities, challenges and ultimately satisfaction related to cases of this nature.
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Affiliation(s)
- J Dudley
- Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - F Mughal
- Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - E Hotinski
- Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
| | - M Mahmud
- Adelaide Dental School, The University of Adelaide, Adelaide, South Australia, Australia
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18
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Cobein MV, Coto NP, Crivello Junior O, Lemos JBD, Vieira LM, Pimentel ML, Byrne HJ, Dias RB. Retention systems for extraoral maxillofacial prosthetic implants: a critical review. Br J Oral Maxillofac Surg 2017; 55:763-769. [PMID: 28552609 DOI: 10.1016/j.bjoms.2017.04.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Accepted: 04/23/2017] [Indexed: 10/19/2022]
Abstract
We describe the techniques available for retention of implant-supported prostheses: bar-clips, O-rings, and magnets. We present reported preferences and, although this is limited by the heterogeneity of methods used and patients studied, we hope we have identified the best retention systems for maxillofacial prosthetic implants. If practitioners know the advantages and disadvantages of each system, they can choose the most natural and comfortable prosthesis. We searched the PubMed and Scopus databases, and restricted our search to papers published 2001-13. MeSH terms used were Maxillofacial prosthesis and Craniofacial prosthesis OR Craniofacial prostheses. We found a total of 2630 papers, and after duplicates had been removed we analysed the rest and found 25 papers for review. Of these, 12 were excluded because they were case reports or non-systematic reviews. Of the remaining 13, 10 described group analyses and seemed appropriate to find practitioner's choices, as cited in the abstract (n=1611 prostheses). Three papers did not mention the type of prosthetic connection used, so were excluded. The most popular choices for different conditions were analysed, though the sites and retention systems were not specified in all 10 papers. The bar-clip system was the most used in auricular (6/10 papers) and nasal prostheses (4/10). For the orbital region, 6/10 favoured magnets. Non-osseointegrated mechanical or adhesive retention techniques are the least expensive and have no contraindications. When osseointegrated implants are possible, each facial region has a favoured system. The choice of system is influenced by two factors: standard practice and the abilities of the maxillofacial surgeon and maxillofacial prosthetist.
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Affiliation(s)
- M V Cobein
- Oral and Maxillofacial Surgeon, Hospital Regional Sul, São Paulo, Brazil; Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - N P Coto
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - O Crivello Junior
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Traumatology, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - J B D Lemos
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Traumatology, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - L M Vieira
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - M L Pimentel
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
| | - H J Byrne
- FOCAS Research Institute of Dublin Institute of Technology, Dublin, Ireland.
| | - R B Dias
- Department of Maxillofacial Surgery, Prosthetics and Traumatology - Area of Maxillofacial Prosthetics, School of Dentistry of University of São Paulo, São Paulo, Brazil.
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19
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Meran Z, Besinis A, De Peralta T, Handy RD. Antifungal properties and biocompatibility of silver nanoparticle coatings on silicone maxillofacial prostheses
in vitro. J Biomed Mater Res B Appl Biomater 2017. [DOI: 10.1002/jbm.b.33917] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Zhala Meran
- School of Biomedical and Biological SciencesUniversity of Plymouth, Drake CircusPlymouthPL4 8AA UK
| | - Alexandros Besinis
- School of Biomedical and Biological SciencesUniversity of Plymouth, Drake CircusPlymouthPL4 8AA UK
- Plymouth University Peninsula Schools of Medicine and Dentistry, University of Plymouth, John Bull Building, Tamar Science ParkPlymouthPL6 8BU UK
| | - Tracy De Peralta
- Plymouth University Peninsula Schools of Medicine and Dentistry, University of Plymouth, John Bull Building, Tamar Science ParkPlymouthPL6 8BU UK
| | - Richard D. Handy
- School of Biomedical and Biological SciencesUniversity of Plymouth, Drake CircusPlymouthPL4 8AA UK
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20
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Ariani N, Reintsema H, Ward K, Sukotjo C, Wee AG. Maxillofacial prosthodontics practice profile: a survey of non-United States prosthodontists. J Otolaryngol Head Neck Surg 2017; 46:35. [PMID: 28449725 PMCID: PMC5408459 DOI: 10.1186/s40463-017-0211-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 04/19/2017] [Indexed: 11/25/2022] Open
Abstract
Background This study surveyed non-United States maxillofacial prosthodontists (MFP) to determine their practice profile and rationale for pursuing an MFP career. Methods Email addresses for the MFP were obtained from the International Society for Maxillofacial Rehabilitation, American Academy of Maxillofacial Prosthetics, and International Academy for Oral Facial Rehabilitation. Emails with a link to the electronic survey program were sent to each participant. Chi-square and Mann–Whitney-U tests were used to investigate the influence of formal MFP training on professional activities and type of treatments provided. Results One hundred twelve respondents (response rate 39%) from 33 nationalities returned the survey. The top three reasons for pursuing an MFP career were personal satisfaction, prosthodontics residency exposure, and mentorship. The predominant employment setting was affiliation with a university (77%). There were significant differences between respondents with and without formal MFP training regarding provision of surgical treatments (P = 0.021) and dental oncology (P = 0.017). Most treatments were done together with otolaryngology, oral surgery (68%) and head and neck surgery (61%). Practitioners not affiliated with a university spent significantly more time in clinical practice (P = 0.002), whereas respondents affiliated with universities spent significantly more time in teaching/training (P = 0.008) and funded research (P = 0.015). Conclusions Personal satisfaction is the most important factor in a decision to choose an MFP career. Most of the MFPs work at a university and within a multidisciplinary setting. There were differences regarding type of treatments provided by respondents with and without formal MFP training.
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Affiliation(s)
- Nina Ariani
- Department of Prosthodontics, Faculty of Dentistry, Universitas Indonesia, Jakarta, Indonesia.,Division of Preventive Dentistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - Harry Reintsema
- Department of Oral and Maxillofacial Surgery, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Kathleen Ward
- Creighton University School of Dentistry, Omaha, NE, USA
| | - Cortino Sukotjo
- Department of Restorative Dentistry, University of Illinois at Chicago, College of Dentistry, Chicago, IL, USA
| | - Alvin G Wee
- Department of Prosthodontics, Creighton University School of Dentistry, Omaha, NE, USA. .,Department of Surgery, Dental Service, Veterans Affairs Nebraska-Western Iowa Healthcare System, 4101 Woolworth Ave, Omaha, NE, 68105, USA.
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Artopoulou II, Chambers MS, Eliades G. Porosity of maxillofacial silicone elastomers and microleakage pattern of the commercially pure Ti-silicone elastomer interface after hydrothermal cycling. J Prosthet Dent 2016; 116:937-942. [PMID: 27460319 DOI: 10.1016/j.prosdent.2016.05.008] [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: 11/20/2015] [Revised: 05/26/2016] [Accepted: 05/27/2016] [Indexed: 11/19/2022]
Abstract
STATEMENT OF PROBLEM Delamination of the maxillofacial silicone elastomer away from the commercially pure titanium (cpTi)-encapsulated magnets affects the long-term performance of the facial restoration. PURPOSE The purposes of this in vitro study were to investigate the interfacial microleakage patterns of 2 maxillofacial silicone elastomers with cpTi when 3 different primers were used and to evaluate the porosity of the 2 elastomers tested. MATERIAL AND METHODS To test the interfacial microleakage patterns of the 2 elastomers MDX4-4210 (EL1) and A-2006 (EL2) with cpTi when 3 metal primers, A-304 (PR1), A-320 bonding enhancer (PR2), Super-Bond C&B monomer (PR3), and ethyl-cyanoacrylate (Super Glue) were used, the bonded interfaces were observed using reflected light microscopy, and the percentage of the linear extent of leakage along the interface (%microleakage) was measured. High-resolution x-ray computed microtomography scanning was used to investigate the percentage of void volume fraction (%VF) for both silicone EL1 and EL2. The data were analyzed with 2-way ANOVA and post hoc tests (α=.05). RESULTS No statistically significant differences were found among the percentages of PR1, PR2, and PR3 microleakage, whereas ethyl-cyanoacrylate showed a statistically significant higher percentage of microleakage than either of the silicone elastomers (P<.001). EL1 medical grade elastomer groups have always had a statistically significantly higher percentage of microleakage than the EL2 platinum silicone elastomer groups (P<.001). For both elastomers, no statistically significant differences were found in %VF (P=.056). CONCLUSIONS Differences in mechanical properties, chemical composition, and manipulations during handling of the maxillofacial silicone elastomers can affect the linear microleakage along the cpTi-silicone elastomer bonding interface and the porosity of the silicone elastomer.
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Affiliation(s)
- Ioli Ioanna Artopoulou
- Lecturer, Department of Prosthodontics, National and Kapodistrian University of Athens, School of Dentistry, Athens, Greece.
| | - Mark S Chambers
- Professor, Section of Maxillofacial Prosthodontics and Oncologic Dentistry, Department of Head and Neck Surgery, Division of Surgery, the University of Texas MD Anderson Cancer Center, Houston, Texas
| | - George Eliades
- Professor, Department of Biomaterials, National and Kapodistrian University of Athens, School of Dentistry, Athens, Greece
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Artopoulou II, Chambers MS, Zinelis S, Eliades G. Peel strength and interfacial characterization of maxillofacial silicone elastomers bonded to titanium. Dent Mater 2016; 32:e137-47. [PMID: 27118682 DOI: 10.1016/j.dental.2016.03.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 01/05/2016] [Accepted: 03/22/2016] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To investigate the effect of three adhesive primers on the morphology, chemistry and peel bond strength of two maxillofacial silicone elastomers with commercially pure titanium (cpTi). METHODS The effect of three primers (PR2:A-304 Primer/A-320 Bonding Enhancer, PR3:Super Bond, and PR4:Super Glue) on cpTi morphology and chemistry were studied by reflected light polarized microscopy (RPOLM) and reflection Fourier-transform infrared microspectroscopy (RFTIRM). For testing the bond strength between two elastomers (EL1:MDX4-4210, EL2:A-2006) and primed cpTi surfaces, a 90° T peel test was performed (PBS), using as reference EL1, EL2 specimens bonded to heat-cured poly(methyl methacrylate) resin (PMMA) primed with A-330G primer (PR1). Failure modes were analyzed under a stereomicroscope, and the percentage of remaining silicone (RS%) on cpTi and PMMA were calculated by image analysis. Scanning electron microscopy/energy dispersive X-ray spectrometry (SEM/EDX) was used to investigate representative failure patterns on cpTi. Data were analyzed with Weibull analysis, ANOVA plus post hoc tests, and Pearson correlation coefficient (a=0.05). RESULTS Thick-irregular (PR2), thin-smooth (PR3), and uniform-porous (PR4) films were identified on cpTi by RPOLM. RFTIRM revealed: a strong peak of Si-O-Si with a distribution following the outline of the image (PR2); COO-M groups developed, but unevenly distributed (PR3); and reduction in CC groups due to in situ polymerization (PR4). Following PBS, the ranking of the statistical significant differences in Weibull scale parameter (σ0) of the EL1 group was PMMA_PR1>cpTi_PR2,cpTi_PR3>cpTi_PR4, whereas for the EL2 group cpTi_PR2>PMMA_PR1>cpTi_PR4,cpTi_PR3. For RS%, the ranking in the EL1 group was: PMMA_PR1>cpTi_PR2>cpTi_PR3>cpTi_PR4, and in the EL2 cpTi_PR2>cpTi_PR3>cpTi_PR4,PMMA_PR1. There was no statistically significant correlation between PBS and RS%, with the exception of EL1_PMMA_PR1. In all groups mixed failure modes were found by SEM/EDX. SIGNIFICANCE Although there is evidence of bonding with cpTi, there are important differences among the primer/elastomer combination that may affect the clinical performance of these materials.
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Affiliation(s)
- Ioli Ioanna Artopoulou
- Department of Prosthodontics, National and Kapodistrian University of Athens, School of Dentistry, Athens, Greece.
| | - Mark S Chambers
- Section of Maxillofacial Prosthodontics and Oncologic Dentistry, Department of Head and Neck Surgery, Division of Surgery, The University of Texas MD Anderson Cancer Center, Houston, USA
| | - Spiros Zinelis
- Department of Biomaterials, National and Kapodistrian University of Athens, School of Dentistry, 2 Thivon Str., 11 527 Goudi, Athens, Greece
| | - George Eliades
- Department of Biomaterials, National and Kapodistrian University of Athens, School of Dentistry, 2 Thivon Str., 11 527 Goudi, Athens, Greece
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Abstract
Implant-retained auricular prostheses are a successful prosthetic treatment option for patients who are missing their ear(s) due to trauma, oncology, or birth defects. The prosthetic ear is aesthetically pleasing, composed of natural looking anatomical contours, shape, and texture along with good color that blends with surrounding existing skin. These outcomes can be optimized by the integration of digital technologies in the construction process. This report describes a sequential process of reconstructing a missing left ear by digital technologies. Two implants were planned for placement in the left mastoid region utilizing specialist biomedical software (Materialise, Belgium). The implant positions were determined underneath the thickest portion (of anti-helix area) left ear that is virtually simulated by means of mirror imaging of the right ear. A surgical stent recording the implant positions was constructed and used in implant fixtures placement. Implants were left for eight weeks, after which they were loaded with abutments and an irreversible silicone impression was taken to record their positions. The right existing ear was virtually segmented using the patient CT scan and then mirror imaged to produce a left ear, which was then printed using 3D printer (Z Corp, USA). The left ear was then duplicated in wax which was fitted over the defect side. Then, it was conventionally flasked. Skin color was digitalized using spectromatch skin color system (London, UK). The resultant silicone color was mixed as prescribed and then packed into the mold. The silicone was cured conventionally. Ear was trimmed and fitted and there was no need for any extrinsic coloring. The prosthetic ear was an exact match to the existing right ear in shape, skin color, and orientation due to the great advantages of technologies employed. Additionally, these technologies saved time and provided a base for reproducible results regardless of operator.
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Guttal SS, Shanbhag S, Kulkarni SS, Thakur SL. Rehabilitation of a missing ear with an implant retained auricular prosthesis. J Indian Prosthodont Soc 2016; 15:70-5. [PMID: 26929490 PMCID: PMC4762293 DOI: 10.4103/0972-4052.155046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Burns can leave a patient with a severely debilitating disability even after treatment. The objectives of burn rehabilitation are to minimize the adverse effects caused by the injury while rehabilitating the patient's physical and psychological well-being, maximizing social integration. Long-term success of maxillofacial prostheses mainly depends on the retention. Extra oral implant retained prostheses have proved to be a predictable treatment option for maxillofacial rehabilitation. Replacement of a severely deformed external ear with burned tissues may be satisfactorily accomplished by a cosmetic prosthesis anchored by implants integrated in the skull. The use of such implants is now a well-recognized method for creating a stable result in maxillofacial rehabilitation. This case report describes a safe, simple and economical method for the rehabilitation of a patient with missing right auricle using an implant supported silicone prosthesis. The implant was placed in the mastoid region of the temporal bone. Reconstruction of the ear was done with auricular silicone prosthesis, retained using magnets incorporated in an autopolymerizing resin shim to decrease the weight of the prosthesis on a single implant. This method eliminates the need of tedious laboratory procedures and exact casting and fitting requirements of a metal substructure while minimizing the overall weight and cost of the prosthesis while maintaining adequate support, esthetics and retention of the prosthesis.
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Affiliation(s)
- Satyabodh Sheshraj Guttal
- Department of Prosthodontics, SDM College of Dental Sciences and Hospital, Dharwad, Karnataka, India
| | - Shruti Shanbhag
- Department of Prosthodontics, SDM College of Dental Sciences and Hospital, Dharwad, Karnataka, India
| | - Sudhindra S Kulkarni
- Department of Oral Implantology, SDM College of Dental Sciences and Hospital, Dharwad, Karnataka, India
| | - Srinath L Thakur
- SDM College of Dental Sciences and Hospital, Dharwad, Karnataka, India
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Çötert HS, Yılmaz M. Bone and Skin-Supported Stereolithographic Surgical Guides for Cranio-Facial Implant Placement. J Maxillofac Oral Surg 2016; 15:76-81. [PMID: 26929557 PMCID: PMC4759023 DOI: 10.1007/s12663-015-0804-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 04/25/2015] [Indexed: 10/23/2022] Open
Abstract
PURPOSE Osseointegrated skin-penetrating implants enhance the retention and stability of the craniofacial prostheses and provide the long-term comfort. However, to determine the implant locations is a great challenge facing the surgeon. Implants may either be located in conventional manner or by STL generated surgical guides. MATERIALS AND METHODS Present study reports the CT based 3D virtual modeling, preoperative virtual planning and the implant placement by using a STL surgical guide, in an anotia case. RESULTS Employed materials and the methods facilitated the implant surgery while improving the operational security. CONCLUSIONS CT based 3D virtual modeling of the surgical site, determining the implant locations virtually and the STL guided placement of the craniofacial implants, were found useful applications in order to facilitating the surgical intervention and providing prevention from complications.
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Affiliation(s)
- Hamit Serdar Çötert
- />Department of Prosthodontics, Faculty of Dentistry, Ege University, 35100 Bornova, Izmir, Turkey
| | - Mustafa Yılmaz
- />Department of Plastic and Reconstructive Surgery, Faculty of Medicine, Dokuz Eylül University, 35330 İnciraltı, Izmir, Turkey
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Hatamleh MM, Polyzois GL, Nuseir A, Hatamleh K, Alnazzawi A. Mechanical Properties and Simulated Aging of Silicone Maxillofacial Elastomers: Advancements in the Past 45 Years. J Prosthodont 2016; 25:418-26. [DOI: 10.1111/jopr.12409] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/21/2015] [Indexed: 11/28/2022] Open
Affiliation(s)
- Muhanad M. Hatamleh
- Cranio-Maxillofacial Prosthetics Unit, King's College Hospital; King's College London Denmark Hill Campus; London UK
| | | | - Amjad Nuseir
- Facutly of Medicine, Jordan University of Science and Technology; King Abdullah University Hospital; Irbid Jordan
| | | | - Ahmad Alnazzawi
- Department of Substitutive Dental Science; Faculty of Dentistry, Taibah University; Madinah Saudi Arabia
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Lundgren TK, Pignatti M, Halle M, Boscaini G, Skogh ACD, Luigi C, De Santis G. Composite orbital reconstruction using the vascularized segmentalized osteo-fascio-cutaneous fibula flap. J Plast Reconstr Aesthet Surg 2015; 69:255-61. [PMID: 26687794 DOI: 10.1016/j.bjps.2015.10.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Revised: 10/01/2015] [Accepted: 10/05/2015] [Indexed: 11/17/2022]
Abstract
Reconstruction of composite orbital defects must address the orbit and an exposed skull base and/or maxillary region. The orbit should not only be covered but also reshaped to accommodate the orbital contents or an epithesis when warranted. This study presents a rationale for a near-anatomical reconstruction of the orbit, together with adjacent dead space obliteration, using the segmentalized osteo-fascia-cutaneous fibula flap. Before the flap transfer, a cutting template for the fibula is made according to the measures and requirements of the facial defect. The segmentalized bone is then osteosynthesized to the facial skeleton and revascularized. Thus, an orbital depth is created by the bony fibula, whereas the fascio-cutaneous part of the flap may be used for lining the orbit and obliteration of the skull base or the maxillary region, or resurface the palate and/or the nasal cavity.
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Affiliation(s)
- T Kalle Lundgren
- Stockholm Craniofacial Center, Department of Reconstructive Plastic Surgery, Karolinska University Hospital, Stockholm, Sweden
| | - Marco Pignatti
- Department of Plastic and Reconstructive Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, Modena, Italy
| | - Martin Halle
- Stockholm Craniofacial Center, Department of Reconstructive Plastic Surgery, Karolinska University Hospital, Stockholm, Sweden
| | - Giulia Boscaini
- Department of Plastic and Reconstructive Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, Modena, Italy
| | - Ann-Charlotte Docherty Skogh
- Stockholm Craniofacial Center, Department of Reconstructive Plastic Surgery, Karolinska University Hospital, Stockholm, Sweden
| | - Chiarini Luigi
- Department of Cranio-Maxillofacial Surgery, Modena University Hospital, Policlinico di Modena, Italy
| | - Giorgio De Santis
- Department of Plastic and Reconstructive Surgery, Azienda Ospedaliero-Universitaria Policlinico di Modena, Modena, Italy.
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de Carvalho BMDF, Freitas-Pontes KM, de Negreiros WA, Verde MARL. Single-stage osseointegrated implants for nasal prosthodontic rehabilitation: A clinical report. J Prosthet Dent 2015; 114:293-6. [PMID: 25976710 DOI: 10.1016/j.prosdent.2015.02.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 02/26/2015] [Accepted: 02/27/2015] [Indexed: 11/27/2022]
Abstract
Malignant tumors in the nasal region may be treated by means of invasive surgical procedures, with large facial losses. Nasal prostheses, retained by osseointegrated facial implants, instead of plastic surgery, will, in most patients, offer good biomechanical and cosmetic results. This clinical report describes the prosthetic rehabilitation of a patient with nasal cancer who had the entire nasal vestibule removed in a single-stage surgical procedure in order to shorten the rehabilitation time. The nasal prosthesis was built on a 3-magnet bar and was made of platinum silicone with intrinsic pigmentation, thereby restoring the patient's appearance and self-esteem. The authors concluded that single-stage implants may reduce the rehabilitation time to as little as 1 month, and the correct use of materials and techniques may significantly improve the nasal prosthesis.
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Affiliation(s)
- Bruna M D F de Carvalho
- Postgraduate student, Federal University of Ceará, Federal University of Ceará, School of Pharmacy, Dentistry and Nursing, Fortaleza, Brazil.
| | - Karina M Freitas-Pontes
- Associate Professor, Department of Restorative Dentistry, Federal University of Ceará, School of Pharmacy, Dentistry and Nursing, Fortaleza, Brazil
| | - Wagner A de Negreiros
- Associate Professor, Department of Restorative Dentistry, Federal University of Ceará, School of Pharmacy, Dentistry and Nursing, Fortaleza, Brazil
| | - Marcus A R L Verde
- Associate Professor, Department of Restorative Dentistry, Federal University of Ceará, School of Pharmacy, Dentistry and Nursing, Fortaleza, Brazil
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29
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Hatamleh MM, Watson J, Srinivasan D. Closed-eye orbital prosthesis: A clinical report. J Prosthet Dent 2015; 113:246-9. [DOI: 10.1016/j.prosdent.2014.07.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 07/29/2014] [Accepted: 07/29/2014] [Indexed: 11/16/2022]
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Polyzois G, Pantopoulos A, Papadopoulos T, Hatamleh M. Effect of light aging on silicone-resin bond strength in maxillofacial prostheses. J Prosthodont 2014; 24:215-9. [PMID: 25081922 DOI: 10.1111/jopr.12202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/07/2014] [Indexed: 11/30/2022] Open
Abstract
PURPOSE The aim of this study was to investigate the effect of accelerated light aging on bond strength of a silicone elastomer to three types of denture resin. MATERIALS AND METHODS A total of 60 single lap joint specimens were fabricated with auto-, heat-, and photopolymerized (n = 20) resins. An addition-type silicone elastomer (Episil-E) was bonded to resins treated with the same primer (A330-G). Thirty specimens served as controls and were tested after 24 hours, and the remaining were aged under accelerated exposure to daylight for 546 hours (irradiance 765 W/m(2) ). Lap shear joint tests were performed to evaluate bond strength at 50 mm/min crosshead speed. Two-way ANOVA and Tukey's test were carried out to detect statistical significance (p < 0.05). RESULTS ANOVA showed that the main effect of light aging was the most important factor determining the shear bond strength. The mean bond strength values ranged from 0.096 to 0.136 MPa. The highest values were recorded for auto- (0.131 MPa) and photopolymerized (0.136 MPa) resins after aging. CONCLUSIONS Accelerated light aging for 546 hours affects the bond strength of an addition-type silicone elastomer to three different denture resins. The bond strength significantly increased after aging for photo- and autopolymerized resins. All the bonds failed adhesively.
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Affiliation(s)
- Gregory Polyzois
- Associate Professor and Chief of Maxillofacial Prosthetics Unit, Department of Prosthodontics, Dental School, University of Athens, Athens, Greece
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Wang L, Liu Q, Jing D, Zhou S, Shao L. Biomechanical properties of nano-TiO2 addition to a medical silicone elastomer: The effect of artificial ageing. J Dent 2014; 42:475-83. [DOI: 10.1016/j.jdent.2014.01.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2013] [Revised: 12/29/2013] [Accepted: 01/03/2014] [Indexed: 02/06/2023] Open
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Watson J, Hatamleh MM. Complete integration of technology for improved reproduction of auricular prostheses. J Prosthet Dent 2014; 111:430-6. [PMID: 24445032 DOI: 10.1016/j.prosdent.2013.07.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2012] [Revised: 07/12/2013] [Accepted: 07/13/2013] [Indexed: 11/18/2022]
Abstract
The accurate reproduction of the form and surface details of missing body structures is an essential part of any successful prosthetic rehabilitation. It helps mask the prosthesis and gives confidence to the patient. This clinical report details the integration of multiple in-house digital technologies of laser scanning, rapid prototyping, and digital color scanning and formulating to improve the shape, texture, orientation, and color of auricular prostheses for 3 patients with missing unilateral ears. A structured light laser scanner was used to digitize the patient's nondefect ear. The digitized data were then manipulated in specialist software and mirrored to reflect the opposing side. A rapid prototyping machine was used to manufacture a 3-dimensional (3D) model of the soft tissue required. This 3D mirrored ear model allowed the accurate reproduction of missing soft tissue. A color spectrometer was used to accurately reproduce the skin tones digitally and physically.
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Affiliation(s)
- Jason Watson
- Consultant Maxillofacial Prosthetist, Maxillofacial Department, Queens Medical Centre, Nottingham University Hospital Trust, Nottingham, Nottingham, UK.
| | - Muhanad M Hatamleh
- Maxillofacial Prosthetist, Maxillofacial Department, Queens Medical Centre; and Lecturer, School of Dentistry, University of Manchester, Manchester, UK
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Atay A, Piskin B, Akin H, Sipahi C, Karakas A, Saracli MA. Evaluation of Candida albicans adherence on the surface of various maxillofacial silicone materials. J Mycol Med 2013; 23:27-32. [PMID: 23375858 DOI: 10.1016/j.mycmed.2012.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 12/06/2012] [Accepted: 12/07/2012] [Indexed: 10/27/2022]
Abstract
OBJECTIVES Fungal infection resulting from Candida adherence on material surface is one of the most important medical risks for maxillofacial prosthesis wearers. Despite wide usage, there is a sparse data evaluating C. albicans adherence on various commercial maxillofacial silicone materials that have different surface contact angles. The objective of this study was to investigate the relationship between surface contact angle and fungal adherence on widely used maxillofacial silicone materials. MATERIALS AND METHODS Three maxillofacial silicone materials titled VST-50, A-2006, and A-2186F were used for fabrication of disc-shaped specimens. Surface contact angle of specimens were measured by the goniometric method. Adhesion quantity of two different C. albicans strains was evaluated with a colorimetric method using XTT/Coenzyme Q0. The Kruskal-Wallis and Mann-Whitney U tests were used for statistical analysis of data. RESULTS The lowest surface contact angle values with the highest Candida adhesion quantity were measured on the specimens fabricated with A-2006 silicone material. Statistically significant differences were found among three maxillofacial silicone materials in terms of both surface contact angle values and adhesion quantity (P<0.01). CONCLUSION There is a close relationship between surface contact angle and quantity of Candida adherence. However, it should be noted that various factors arising from material properties may affect the complex nature of the Candida adhesion process.
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Affiliation(s)
- A Atay
- Haydarpasa Training Hospital, Department of Prosthodontics, Istanbul, Turkey.
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Goiato M, dos Santos D, Bannwart L, Moreno A, Pesqueira A, Haddad M, dos Santos E. Psychosocial impact on anophthalmic patients wearing ocular prosthesis. Int J Oral Maxillofac Surg 2013; 42:113-9. [DOI: 10.1016/j.ijom.2012.05.028] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Revised: 04/03/2012] [Accepted: 05/31/2012] [Indexed: 11/27/2022]
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Hatamleh MM, Watson J. Construction of an Implant-Retained Auricular Prosthesis with the Aid of Contemporary Digital Technologies: A Clinical Report. J Prosthodont 2012; 22:132-6. [DOI: 10.1111/j.1532-849x.2012.00916.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Current world literature. Curr Opin Otolaryngol Head Neck Surg 2012; 20:148-51. [PMID: 22555614 DOI: 10.1097/moo.0b013e328351a36c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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38
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Moreno A, Goiato MC, dos Santos DM, Haddad MF, Pesqueira AA, Bannwart LC. Effect of different disinfectants on the microhardness and roughness of acrylic resins for ocular prosthesis. Gerodontology 2012; 30:32-9. [DOI: 10.1111/j.1741-2358.2012.00642.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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39
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Goiato MC, dos Santos DM, Moreno A, Iyda MG, Rezende MCRA, Haddad MF. Effect of disinfection and storage on the flexural strength of ocular prosthetic acrylic resins. Gerodontology 2011; 29:e838-44. [DOI: 10.1111/j.1741-2358.2011.00570.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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Contemporary options for lateral skull base reconstruction following tumor extirpation. Curr Opin Otolaryngol Head Neck Surg 2011; 19:330-4. [DOI: 10.1097/moo.0b013e328349a10c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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41
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Hatamleh MM, Polyzois GL, Silikas N, Watts DC. Effect of Extraoral Aging Conditions on Mechanical Properties of Maxillofacial Silicone Elastomer. J Prosthodont 2011; 20:439-46. [DOI: 10.1111/j.1532-849x.2011.00736.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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42
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Pekkan G, Tuna SH, Oghan F. Extraoral prostheses using extraoral implants. Int J Oral Maxillofac Surg 2011; 40:378-83. [PMID: 21255978 DOI: 10.1016/j.ijom.2010.12.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2010] [Revised: 09/20/2010] [Accepted: 12/13/2010] [Indexed: 10/18/2022]
Abstract
The aim of this study was to evaluate extraoral prostheses and the use of extraoral implants in patients with facial defects. 10 cases were treated utilizing maxillofacial prostheses employing extraoral implants in five cases. 16 extraoral implants were installed. Seven implants were placed in irradiated sites in the orbital regions. Six implants were placed in mastoid regions and three in a zygoma region that was irradiated. Two implants failed before initial integration was achieved in irradiated areas. Using 14 extraoral implants as anchors, five extraoral prostheses were set. The other five cases were treated with extraoral prostheses without using extraoral implants due to cost and patient-related factors. The data included age, sex, primary disease, implant length, implant failure, prosthetic attachment, radiation therapy, and peri-implant skin reactions. The use of extraoral implants for the retention of extraoral prostheses has simplified the placement, removal, and cleaning of the prosthesis by the patient. The stability of the prostheses was improved by anchors. Clinical and technical problems are presented with the techniques used for their resolution. Using extraoral implants resulted in a high rate of success in retaining facial prostheses and gave good stability and aesthetic satisfaction.
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Affiliation(s)
- G Pekkan
- Department of Dentistry, Dumlupinar University, Kutahya, Turkey
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