BME (Biomaterials).
J Dent Res. 2010 Mar;89(3):241-5. doi: 10.1177/0022034509357716. Epub 2009 Dec 30.
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.
为了确定人工颞下颌关节植入物失败的原因，必须研究生理负荷下最大应力的大小和位置。在这项研究中，我们使用有限元软件包分析了一种市售 TMJ 植入物、骨骼（即下颌骨）和骨-植入物界面的应力。研究了钛和 Co-Cr-Mo/Vitallium 金属以及不同程度骨质疏松的骨骼。分析结果表明，最大应力发生在植入物第一个螺钉孔（最靠近髁突）的位置。此外，在第一个螺钉孔附近的骨中观察到最高的微应变。我们的研究结果在改进植入物设计和提高性能方面具有潜在的临床益处。
