The Effects of Unilateral Alloplastic Temporomandıbular Joint Replacement on the Opposıte Side Natural Joint: A Finite Element Analysis

Publication date: Available online 24 May 2017
Source:Journal of Oral and Maxillofacial Surgery
Author(s): B. Bekcioglu, E. Bulut, B. Baş
PurposeThe purpose of this study was to evaluate the stress distrubution on the temporomandibular joint (TMJ) prosthesis and contralateral natural TMJ with finite element analysis.MethodsA TMJ implant was used to create a 3-dimensional model by computer. This model was integrated to a mandible model which created by computer by using computerized tomography images, similar to real TMJ replacement procedure. Masticatory loads were applied to the model. The loads transmitted to the TMJ prosthesis and contralateral healthy joint was evaluated by means of finite element analysis.ResultsAt the model without TMJ prosthesis, maximum von Misses stress was found to be 252.697 N/mm² at the condyle and 5.418 N/mm² at the disc. At the model with unilateral TMJ prosthesis, maximum stress at the joint prosthesis was found to be 792.681 N/mm². At the contralateral natural joint, maximum stress was found to be 268.908 N/mm² at the condyle and 8.357 N/mm² at the disc.ConclusionAt the TMJ model with unilateral total TMJ prosthesis, increased stress values was observed at the disk and the condyle of the contralateral natural TMJ.



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