| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a total disc implant (TDI) for total replacement of a spinal disc or discs in a human patient or other mammal. <P>SOLUTION: The TDI generally comprises upper and lower end plates for affixation to adjacent vertebral bodies, with an intervening insert disposed therebetween. The end plates each include part-cylindrical surfaces oriented generally perpendicular to each other, with one of the surfaces extending in an anterior-posterior direction and the other extending in a medial-lateral direction. The intervening insert defines concave upper and lower part-cylindrical seats oriented for respectively engaging these part-cylindrical surfaces, wherein these part-cylindrical seats are defined by offset radii to include a somewhat flattened center base region merging smoothly with upward curving sides. <P>COPYRIGHT: (C)2010,JPO&INPIT |
