发明名称 |
Artificial intervertebral disc having limited rotation using a captured ball and socket joint with a solid ball, a retaining cap, and an interference ball bearing |
摘要 |
An artificial disc having a pair of opposing baseplates, for seating against opposing vertebral bone surfaces, separated by a ball and socket joint that includes a solid ball mounted to protrude from one of the baseplates. The ball is captured within a curvate socket formed in a peak of a convex structure integral with the other of the baseplates. The socket is formed by opposing curvate pockets, one on the convex structure and one on a cap secured to the other of the baseplates. While the ball angulates in the socket, its rotation in the socket has a limited range due to interference between a ball bearing and curvate recesses on the convex structure and the ball. The ball and socket joint therefore permits the baseplates to rotate relative to one another through a limited range and also angulate relative to one another. |
申请公布号 |
US7163559(B2) |
申请公布日期 |
2007.01.16 |
申请号 |
US20020294988 |
申请日期 |
2002.11.14 |
申请人 |
SPINECORE, INC. |
发明人 |
ERRICO JOSEPH P.;DUDASIK MICHAEL W.;ZUBOK RAFAIL |
分类号 |
A61F2/44;A61B17/56;A61F2/00;A61F2/02;A61F2/30;A61F2/46 |
主分类号 |
A61F2/44 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|