| 摘要 |
An intra-articular device comprises a membrane cap (40) having a geometry similar to a head of a bone for a joint to be restored. The cap has an open end that is stretched over the head of the bone and held in position on the bone interposed between the head and the articular component of the joint. The membrane is made of a material such as a polyether-urethane-urea with a property of absorbing the joint's own synovial fluid to swell and have a viscoelastic property similar to the body's own cartilage. In a preferred embodiment, the membrane cap is used on a femoral bone for restoring a hip joint. The method of installing the cap is by surgically exposing the head of the bone, stretching the cap over the head of the bone, then repositioning the capped head of the bone back in place with the membrane interposed in the joint. |
