DEVELOPMENT OF AN IMPLANT FOR FINGER JOINT ARTHROPLASTY

外科医生对疼痛、畸形、关节炎的手进行关节成形术 关节不能选择用 假体，将恢复接近自然的运动，因为他们会，如果一个 髋关节被替换。 没有有效的指关节 可用的替代品。 过去生产铰链型接头的尝试都失败了，因为 销的铰链孔的所有负荷放在手指导致其 早期崩溃 创新的Arthroflex概念是基于这样一个事实， 当手指移动的时候。 当施加负载时， 很少或没有运动。 通过弹性安装销， 导致刚性杆上的大配合表面接触， 从而减轻销的负荷。 拟定研究旨在证明Arthroflex的可行性 概念. 运动学和有限元分析（FEA）将用于 分析在正常的手使用过程中关节上的力。 测试数据应 将被纳入有限元分析程序，以制定 用于原型开发和临床测试的最终机械设计 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.