| 摘要 |
PROBLEM TO BE SOLVED: To provide a prosthesis assembly which contains a cup-shaped insert body comprising a ceramic substance having an extended bearing surface. SOLUTION: In a prosthesis assembly which comprises a fixed element given a shape of an acetabular shell 2 and a bearing cup part 4, the bearing cup part 4 has a rim 8 with an expansible part 10. As a result, a moving range on the bearing surface is increased to reduce hazardous positional deviation. The expansible part 10 of the rim 8 is extended almost radially on a flat rim 2b of the shell 2 from a cup part inserting body 4 to enhance the strength of the expansible rim part 10, thereby eliminating the danger of busting the expansible rim part 10. The insert body 4 can be formed out of a ceramic substance. |
