| 摘要 |
<p>A swivel coupling (1) for attachment to human or animal bone comprises a main body (2) consisting of first and second clamping elements (4, 6) which are clamped together by means of a threaded fastener (10). A first connection element comprising a substantially spherical annular coupling (24) is located between the clamping elements (4, 6) and in a relaxed state of the threaded fastener (10) is able to swivel relative to the main body (2). When the threaded fastener (10) is tightened, the clamping elements (4, 6) are brought together to clamp the connection element (24) in a fixed position relative to the main body (2). A bone engaging element such as a bone screw or hook (32), or a spinal correction rod may be fitted to the connection element (24). In a preferred embodiment, two connection elements (24, 70) are provided, both of the connection elements (24, 70) being clamped when the threaded fastener (10) is tightened. In this preferred embodiment, a bone screw or hook (32) may be fitted to one of the connection elements (24) and a spinal correction rod may be fitted to the other connection element (70). <IMAGE></p> |
