Ceramic implant coated with sheats of tendon replacement arthroplasty for Kienbock's disease. Stress and pressure distribution analysis.

为了确定陶瓷月骨置换腕关节作为治疗Kienb_ck病的可能方法的有效性，我们通过有限元法（FEM）分析了五个腕关节模型的应力分布；一个是正常的手腕，一个是去除了月骨的手腕，一个是用肌腱代替的手腕，一个是用陶瓷核心代替的肌腱代替的手腕，一个是用涂有肌腱片的陶瓷代替的手腕。将有限元分析结果与压敏膜法对腕部压力分布的分析结果和触觉传感器对桡月关节压力的测量结果进行了比较。陶瓷月骨种植体模型腕部应力和压力分布均匀。螺旋肌腱模型和陶瓷芯模型都能抵抗外力。这些结果表明，陶瓷月骨种植体可防止腕塌陷。

To determine the usefulness of a ceramic lunate replacement for the wrist joint as a possible treatment for Kienb_ck's disease, we analyzed stress distribution by the finite element method (FEM) in five wrist joint models ; a normal wrist, one with the lunate bone removed, one with a coiled tendon replacement, one with a coiled tendon replacement with a ceramic core, and one with a ceramic lunate replacement coated with sheets of tendon. The results of FEM analyses were compared with those of pressure distribution analyses on the wrist joint using pressure-sensitive film and measurement of pressure on the radio- lunate joint with a tactile sensor. Stress and pressure were well-distributed in the Wrist joint of the ceramic lunate implant model. the coiled tendon model nor ceramic core model was able to resist applied force. These results demonstrate that the ceramic lunate implant prevents carpal collapse.