XXXX sockets and alumina ceramic heads in cemented total hip arthroplasty. A ten-year study.

@entity1 @entity691 @entity571 @entity7195 @entity7194 @entity3946 @entity572
From 1981 to 1983, we implanted Bioceram type-4 and type-5 prostheses in 61 @entity572 in 54 @entity1 with @entity571 secondary to @entity7195 , @entity7194 , or @entity3946 . Fifty-seven @entity572 in 50 @entity1 were followed for a mean of 11.1 years (10 to 13). The mean age of the @entity1 at operation was 53 years (31 to 70). Functional evaluation using the Merle d'Aubign   and Postel hip score showed a 77% success rate. Radiological loosening occurred in three femoral (5%) and 16 acetabular components (28%). Autologous femoral head grafts were used in 18 @entity572 and became incorporated, giving mechanical support to the socket except for one which occupied a large weight-bearing area and eventually collapsed. The mean @entity691 wear was 1.1 mm (0 to 3.6) and the mean wear rate was 0.10 mm/year (0 to 0.31). A high rate of wear correlated with calcar resorption (p > 0.002) but not with acetabular loosening. There was no breakage of a ceramic head. Study of the ceramic heads and @entity691 sockets retrieved after ten years showed excellent surface roughness, sphericity, and bending strength for the heads but scratches and voids were seen on the sockets.
