| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a simple intervertebral disk prosthesis which makes it possible to limit the movements of various constituent parts of the prosthesis with respect to each other. <P>SOLUTION: The intervertebral disk prosthesis includes an upper plate 1, a lower plate 2, and a core 3, the upper surface of the core 3 is in contact with at least part 10 of the lower surface of the upper plate 1 and the lower surface of the core 3 is in contact with at least part of the upper surface of the lower plate 2, and the lower plate 1 is movable at least with respect to the core 3, the prosthesis is characterized in that there are cooperation means between the lower plate 2 and the core 3, so as to limit or eliminate translation movements of the core 3 with respect to the lower plate 2 along an axis substantially parallel to the lower plate 2, and to limit or eliminate rotation movements of the core 3 with respect to the lower plate 2, around an axis substantially perpendicular to the lower plate 2, the planes passing through the upper 1 and lower 2 plates forming a substantially constant angle. <P>COPYRIGHT: (C)2009,JPO&INPIT |
