Burak Bekcioglu1, Emel Bulut2, Burcu Bas3. 1. Chief of Staff, Oldcitydent Dental Health Hospital, Eskişehir, Turkey. 2. Associate Dean and Associate Professor, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey. Electronic address: euzun@omu.edu.tr. 3. Associate Professor, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey.
Abstract
PURPOSE: The purpose of this study was to evaluate the stress distribution on the temporomandibular joint (TMJ) prosthesis and contralateral natural TMJ with finite-element analysis. MATERIALS AND METHODS: A TMJ implant was used to create a 3-dimensional model with a computer. This model was integrated with a mandible model created with a computer by use of computed tomography images, similar to a real TMJ replacement procedure. Masticatory loads were applied to the model. The loads transmitted to the TMJ prosthesis and contralateral healthy joint were evaluated by means of finite-element analysis. RESULTS: In the model without the TMJ prosthesis, maximum von Mises stress was 252.697 N/mm2 at the condyle and 5.418 N/mm2 at the disc. In the model with the unilateral TMJ prosthesis, maximum stress at the joint prosthesis was 792.681 N/mm2. In the contralateral natural joint, maximum stress was 268.908 N/mm2 at the condyle and 8.357 N/mm2 at the disc. CONCLUSIONS: In the TMJ model with the unilateral total TMJ prosthesis, increased stress values were observed at the disc and condyle of the contralateral natural TMJ.
PURPOSE: The purpose of this study was to evaluate the stress distribution on the temporomandibular joint (TMJ) prosthesis and contralateral natural TMJ with finite-element analysis. MATERIALS AND METHODS: A TMJ implant was used to create a 3-dimensional model with a computer. This model was integrated with a mandible model created with a computer by use of computed tomography images, similar to a real TMJ replacement procedure. Masticatory loads were applied to the model. The loads transmitted to the TMJ prosthesis and contralateral healthy joint were evaluated by means of finite-element analysis. RESULTS: In the model without the TMJ prosthesis, maximum von Mises stress was 252.697 N/mm2 at the condyle and 5.418 N/mm2 at the disc. In the model with the unilateral TMJ prosthesis, maximum stress at the joint prosthesis was 792.681 N/mm2. In the contralateral natural joint, maximum stress was 268.908 N/mm2 at the condyle and 8.357 N/mm2 at the disc. CONCLUSIONS: In the TMJ model with the unilateral total TMJ prosthesis, increased stress values were observed at the disc and condyle of the contralateral natural TMJ.
Authors: Natalia Tavares de Souza; Renan Carlos Lopes Cavalcante; Maria Aparecida de Albuquerque Cavalcante; Wagner Hespanhol; Marcello Rodrigues de Oliveira; Dennis de Carvalho Ferreira; Thais Machado de Carvalho Coutinho; Lucio Souza Gonçalves Journal: BMC Res Notes Date: 2017-12-08