| 摘要 |
An acetabular cup (10) for insertion into an acetabulum (16) comprises an outer metallic shell (12) and an inner resilient plastic insert (14), the insert (14) having a spherical shaped inner surface (20) adapted to articulate with a femoral head (22) and an outer surface (26) comprising a truncated cone (28) terminating at the upper end thereof in a spherical crown (30), the shell (12) having an inner surface (32) substantially congruent with the insert outer surface (26) and an essentially hemispherical outer surface (34) terminating in an annular flange (36) adapted to be countersunk into the acetabulum (16), the shell outer surface (34) having an annular ridge (38) of uniform height spaced from and parallel to the flange (36), the flange (36) and the ridge (38) being adapted to facilitate centering the cup (10) in the acetabulum (16) with the shell outer surface (34) uniformly spaced from the wall (40) of the acetabulum (16). Novel acetabular reamers (58,72) for use in installing the acetabular cup (10) are also disclosed. |
