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Ingawale SM, Goswami T. Design and Finite Element Analysis of Patient-Specific Total Temporomandibular Joint Implants. MATERIALS 2022; 15:ma15124342. [PMID: 35744401 PMCID: PMC9228547 DOI: 10.3390/ma15124342] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 06/14/2022] [Accepted: 06/16/2022] [Indexed: 02/04/2023]
Abstract
In this manuscript, we discuss our approach to developing novel patient-specific total TMJ prostheses. Our unique patient-fitted designs based on medical images of the patient’s TMJ offer accurate anatomical fit, and better fixation to host bone. Special features of the prostheses have potential to offer improved osseo-integration and durability of the devices. The design process is based on surgeon’s requirements, feedback, and pre-surgical planning to ensure anatomically accurate and clinically viable device design. We use the validated methodology of FE modeling and analysis to evaluate the device design by investigating stress and strain profiles under functional/normal and para-functional/worst-case TMJ loading scenarios.
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Affiliation(s)
- Shirish M. Ingawale
- Department of Biomedical, Industrial & Human Factors Engineering, Wright State University, 3640 Col Glen Hwy, Dayton, OH 45435, USA;
| | - Tarun Goswami
- Department of Biomedical, Industrial & Human Factors Engineering, Wright State University, 3640 Col Glen Hwy, Dayton, OH 45435, USA;
- Department of Orthopaedic Surgery and Sports Medicine, Wright State University, Dayton, OH 45435, USA
- Correspondence: ; Tel.: +1-(937)-775-5120
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Zadi ZH, Bidhendi AJ, Shariati A, Pae EK. A clinically friendly viscoelastic finite element analysis model of the mandible with Herbst appliance. Am J Orthod Dentofacial Orthop 2020; 160:215-220.e2. [PMID: 32863087 DOI: 10.1016/j.ajodo.2020.04.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 04/01/2020] [Accepted: 04/01/2020] [Indexed: 10/23/2022]
Abstract
INTRODUCTION As a powerful numerical approximation tool, finite element analysis (FEA) has been widely used to predict stress and strain distributions in facial bones generated by orthodontic appliances. Previous FEA models were constructed on the basis of a linear elastic phase of the bone response (eg, elastic bone strains to loading). However, what is more useful for clinical understanding would be predicting long-term strains and displacements of bone-segments responding to loading, yet tissue responses are (1) not promptly observable and (2) hard to predict in nature. METHODS Viscoelastic property of the mandibular bone was incorporated into FEA models to visualize long-term, time-dependent stress and strain patterns in the mandible after being exposed to orthopedic stress. A mandible under loading by a Herbst appliance was modeled, and outcomes of the constructed elastic and viscoelastic models were compared. RESULTS Patterns and magnitudes of the displacement throughout the mandible predicted by the viscoelastic model were exhibited in accordance with previous clinical outcomes of Herbst appliance therapy. The elastic models exhibited similar displacement patterns; however, the magnitude of the displacements in the models was invariably small (approximately 1 per 100) compared with those outputs of corresponding viscoelastic models. The corresponding maximum stress level in our viscoelastic mandible subjected to the Herbst appliance with the same loading was considerably low and relaxed in various regions when compared with the elastic model. CONCLUSIONS We suggest that a viscoelastic model of the mandible mimics our general prediction of orthopedic treatment outcomes better than those by elastic models.
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Affiliation(s)
| | - Amir J Bidhendi
- Department of Plant Science, McGill University, Montreal, Québec, Canada
| | | | - Eung-Kwon Pae
- Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Maryland, Baltimore, Md.
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Cervino G, Romeo U, Lauritano F, Bramanti E, Fiorillo L, D'Amico C, Milone D, Laino L, Campolongo F, Rapisarda S, Cicciù M. Fem and Von Mises Analysis of OSSTEM ® Dental Implant Structural Components: Evaluation of Different Direction Dynamic Loads. Open Dent J 2018; 12:219-229. [PMID: 29682092 PMCID: PMC5885472 DOI: 10.2174/1874210601812010219] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/12/2018] [Accepted: 02/28/2018] [Indexed: 11/22/2022] Open
Abstract
Purpose: The objective of this investigation is to study prosthodontics and internal components resistance to the masticatory stress and considering different force directions by using Finite Element Method analysis (FEM). The structural materials of the components are usually Titanium alloy grade 4 or 5 and thus, guarantee the integration of the fixture in the bone due to the osteointegration phenomena. Even if the long-term dental implant survival rate is easy to be obtained and confirmed by numerous researches, the related clinical success, due to the alteration of the mechanical and prosthodontics components is still controversial. Methods: By applying engineering systems of investigations like FEM and Von Mises analyses, it has been investigated how dental implant material was held against the masticatory strength during the dynamic masticatory cycles. A three-dimensional system involved fixture, abutment and the connection screws, which were created and analyzed. The elastic features of the materials used in the study were taken from recent literature data. Results: Data revealed a different response for both types of devices, although implant neck and dental abutment showed better results for all conditions of loading while the abutment screw represented aweak point of the system. Conclusion: The data of this virtual model showed all the features of different prosthetic retention systems under the masticatory load. Clinicians should find better prosthetic balance in order to better distribute the stress over the component and to guarantee patients’ clinical long-term results.
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Affiliation(s)
- Gabriele Cervino
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, School of Dentistry, University of Messina, ME, Italy
| | - Umberto Romeo
- Department of Oral and Maxillo-facial Sciences, Pediatric Dentistry Unit, "Sapienza" University of Rome, Rome, Italy
| | - Floriana Lauritano
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, School of Dentistry, University of Messina, ME, Italy
| | - Ennio Bramanti
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, School of Dentistry, University of Messina, ME, Italy
| | - Luca Fiorillo
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, School of Dentistry, University of Messina, ME, Italy
| | - Cesare D'Amico
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, School of Dentistry, University of Messina, ME, Italy
| | - Dario Milone
- Departments of Engineering, University of Messina, Messina, Italy
| | - Luigi Laino
- Multidisciplinary Department of Medical-Surgical and Odontostomatological Specialties, University of Campania "Luigi Vanvitelli", Naples, NA, Italy
| | | | - Silvia Rapisarda
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, School of Dentistry, University of Messina, ME, Italy
| | - Marco Cicciù
- Department of Biomedical and Dental Sciences, Morphological and Functional Images, School of Dentistry, University of Messina, ME, Italy
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FEM Analysis of Mandibular Prosthetic Overdenture Supported by Dental Implants: Evaluation of Different Retention Methods. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2015; 2015:943839. [PMID: 26798405 PMCID: PMC4700170 DOI: 10.1155/2015/943839] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 10/30/2015] [Accepted: 11/03/2015] [Indexed: 11/17/2022]
Abstract
Prosthetic rehabilitation of total edentulous jaws patients is today a common technique that clinicians approach in their daily practice. The use of dental implants for replacing missing teeth is going to be a safe technique and the implant-prosthetic materials give the possibility of having long-term clinical success. Aim of this work is to evaluate the mechanical features of three different prosthetic retention systems. By applying engineering systems of investigations like FEM and von Mises analyses, how the dental implant material holds out against the masticatory strength during the chewing cycles has been investigated. Three common dental implant overdenture retention systems have been investigated. The ball attachment system, the locator system, and the common dental abutment have been processed by Ansys Workbench 15.0 and underwent FEM and von Mises investigations. The elastic features of the materials used in the study have been taken from recent literature data. Results revealed different response for both types of device, although locator system showed better results for all conditions of loading. The data of this virtual model show all the features of different prosthetic retention systems under the masticatory load. Clinicians should find the better prosthetic solution related to the patients clinical condition in order to obtain long-term results.
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Abel EW, Hilgers A, McLoughlin PM. Finite element analysis of a condylar support prosthesis to replace the temporomandibular joint. Br J Oral Maxillofac Surg 2015; 53:352-7. [PMID: 25703687 DOI: 10.1016/j.bjoms.2015.01.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2014] [Accepted: 01/21/2015] [Indexed: 12/01/2022]
Abstract
This paper presents a finite element study of a temporomandibular joint (TMJ) prosthesis in which the mandibular component sits on the condyle after removal of only the diseased articular surface and minimal amount of condylar bone. The condylar support prosthesis (CSP) is customised to fit the patient and allows a large part of the joint force to be transmitted through the condyle to the ramus, rather than relying only on transfer of the load by the screws that fix the prosthesis to the ramus. The 3-dimensional structural finite element analysis compared a design of CSP with a standard commercial prosthesis and one that was modified to fit the ramus, to relate the findings to the different designs and geometrical features. The models simulated an incisal bite under high loading. In the CSP and in its fixation screws, the stresses were much lower than those in the other 2 prostheses and the bone strains were at physiological levels. The CSP gives a more physiological form of load transfer than is possible without the condylar contact, and considerably reduces the amount of strain on the bone around the screws.
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Affiliation(s)
- Eric W Abel
- School of Engineering, Physics and Mathematics, University of Dundee, Dundee DD1 4HN, United Kingdom.
| | - André Hilgers
- School of Engineering, Physics and Mathematics, University of Dundee, Dundee DD1 4HN, United Kingdom.
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Chowdhury AR, Kashi A, Saha S. A comparison of stress distributions for different surgical procedures, screw dimensions and orientations for a Temporomandibular joint implant. J Biomech 2011; 44:2584-7. [DOI: 10.1016/j.jbiomech.2011.06.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 05/30/2011] [Accepted: 06/01/2011] [Indexed: 11/28/2022]
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Abstract
To determine the causes of failure of an artificial temporomandibular joint implant, one must study the magnitude and location of the maximum stresses under physiological loading. In this study, we analyzed the stresses in a commercially available TMJ implant, the bone ( i.e., mandible), and the bone-implant interface using a finite element software package. Both titanium and Co-Cr-Mo/Vitallium metals as well as bones with various degrees of osteoporosis were studied. The results of the analysis showed that the maximum stresses occurred at the location of the first screw hole (closest to the condyle) of the implant. In addition, the highest microstrains were observed in the bone adjacent to the first screw hole. The results of our study have potential clinical benefit in terms of improved implant design and hence better performance.
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Affiliation(s)
- A. Kashi
- PhD Candidate, BME (Biomaterials),
- Visiting Research Scientist, and
- Director of Musculoskeletal Research, Department of Orthopedic Surgery and Rehabilitation Medicine, SUNY Downstate Medical Center, 450 Clarkson Avenue, Box 30, Brooklyn, NY 11203, USA
| | - A. Roy Chowdhury
- PhD Candidate, BME (Biomaterials),
- Visiting Research Scientist, and
- Director of Musculoskeletal Research, Department of Orthopedic Surgery and Rehabilitation Medicine, SUNY Downstate Medical Center, 450 Clarkson Avenue, Box 30, Brooklyn, NY 11203, USA
| | - S. Saha
- PhD Candidate, BME (Biomaterials),
- Visiting Research Scientist, and
- Director of Musculoskeletal Research, Department of Orthopedic Surgery and Rehabilitation Medicine, SUNY Downstate Medical Center, 450 Clarkson Avenue, Box 30, Brooklyn, NY 11203, USA
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