Bekcioglu Burak, Bulut Emel, Bas Burcu
Chief of Staff, Oldcitydent Dental Health Hospital, Eskişehir, Turkey.
Associate Dean and Associate Professor, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey.
J Oral Maxillofac Surg. 2017 Nov;75(11):2316-2322. doi: 10.1016/j.joms.2017.05.017. Epub 2017 May 24.
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.
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.
In the model without the TMJ prosthesis, maximum von Mises stress was 252.697 N/mm at the condyle and 5.418 N/mm at the disc. In the model with the unilateral TMJ prosthesis, maximum stress at the joint prosthesis was 792.681 N/mm. In the contralateral natural joint, maximum stress was 268.908 N/mm at the condyle and 8.357 N/mm at the disc.
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.
本研究的目的是通过有限元分析评估颞下颌关节（TMJ）假体及对侧天然颞下颌关节上的应力分布。
使用一个TMJ植入物通过计算机创建一个三维模型。该模型与通过计算机利用计算机断层扫描图像创建的下颌骨模型相结合，类似于实际的TMJ置换手术。将咀嚼负荷施加于该模型。通过有限元分析评估传递至TMJ假体及对侧健康关节的负荷。
在没有TMJ假体的模型中，髁突处的最大冯·米塞斯应力为252.697N/mm，盘处为5.418N/mm。在单侧TMJ假体模型中，关节假体处的最大应力为792.681N/mm。在对侧天然关节中，髁突处的最大应力为268.908N/mm，盘处为8.357N/mm。
在单侧全TMJ假体的TMJ模型中，观察到对侧天然TMJ的盘和髁突处应力值增加。
