DEVELOPMENT OF AN IMPLANT FOR FINGER JOINT ARTHROPLASTY

外科医生为疼痛、畸形、关节炎的手进行关节成形术 关节无法选择将损坏的关节替换为 假体将恢复接近自然的运动，就像如果 髋关节被置换术。没有有效的手指关节 有可用的替代品。 过去生产铰链式关节的尝试都失败了，因为 铰链的销承受着施加在通向其上的手指上的所有载荷 早期崩溃。 创新的Arthroflex概念基于这样一个事实，即小负载 在手指移动时应用。当施加载荷时，存在 很少或没有动静。通过弹性地安装销，加载将 使刚性杆上的大型配合表面接触，从而 把负载从销子上卸下来。 拟议的研究是为了证明Arthroflex的可行性 概念。运动学和有限元分析(FEA)将用于 分析正常手部使用过程中关节上的力。测试数据将被 将被纳入有限元分析程序中，以制定 用于原型开发和临床测试的终极机械设计 在第二阶段。

Surgeons performing arthroplasty on painful, misshapen, arthritic hand joints do not have the choice of replacing the damaged joint with a prosthesis that will restore near natural movement, as they would if a hip joint were being replaced. There are no effective finger joint replacements available. Past attempts to produce hinge type joints have failed because the minute pin of the hinge bore all the load placed on the finger leading to its early breakdown. The innovative Arthroflex concept is based on the fact that little load is applied when the fingers are moving. When a load is applied there is little or no movement. By mounting the pin elastically, loading will cause large mating surfaces on the rigid stems to come in contact, thus taking the load off the pin. Proposed research is to demonstrate feasibility of the Arthroflex concept. Kinematic and finite element analysis (FEA) will be used to analyze forces on joints during normal hand usage. Test data to be produced will be incorporated in the FEA program to formulate the ultimate mechanical design for prototype development and clinical testing during Phase II.