Radiographic demarcation of the acetabular bone-cement interface. The effect of femoral head size.
Between 1983 and 1988, 182 total hip arthroplasties were inserted using modern cement techniques including metal-backed acetabular components. Femoral head size was 32 mm in 84, 22 mm in 98. Radiographic analysis revealed three-zone demarcation of acetabular bone-cement interface in 56% of the 32 mm group as compared to 5% of the 22 mm group at 19 and 24 months mean follow-up period, respectively. When a subgroup of women under 60 years of age was created to control variables, the high-grade demarcation rates were 67% and 18%, respectively. Although Charnley hip scores remain similar between the two groups, these results emphasize the adverse effects of large femoral head prostheses on cement-bone interface and underline the need for alternative methods of fixation.
Frankel
A
A
Program of Orthopaedic Surgery, Thomas Jefferson University, Philadelphia, Pennsylvania 19107.
Balderston
R A
RA
Booth
R E
RE
Rothman
R H
RH
D000368:Aged; D002484:Cementation; D005260:Female; D005270:Femur Head; D006621:Hip Joint / Q000000981:diagnostic imaging*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011475:Prosthesis Failure; D011859:Radiography