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

为探讨陶瓷月骨替代腕关节治疗Kienb_ck病的可行性，我们用有限元方法分析了5个腕关节模型的应力分布：正常腕关节、去除月骨的腕关节模型、盘状肌腱置换模型、陶瓷芯盘状肌腱置换模型和覆有肌腱的陶瓷月骨置换模型。将有限元分析结果与用压敏胶片测量腕关节压力分布和用触觉传感器测量月骨关节压力的结果进行了比较。陶瓷月骨种植体模型腕关节内应力和压力分布均匀。缠绕肌腱模型和陶瓷核模型均不能抵抗外力。这些结果表明，陶瓷月骨植入物可以防止腕骨塌陷。

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.