We assessed 35 hip arthroplasties in 30 patients with an average follow-up
of 7 years. AII patients suffered from secondary osteoarthrosis due to cong
enital dysplasia The mean age at the time of surgery was 54 (19-77) years.
Part of the femoral head used as a graft was fixed to the superolateral reg
ion of the acetabulum. A 100% bone coverage of the acetabular component was
achieved initially. The mean support by the graft was 34%. The graft size,
measured in the AP view, decreased on average 29% after 7 years. The resor
ption caused a reduction in cup coverage to 94%. There was no correlation b
etween the clinical outcome and the graft size. Graft: resorption occurred
in the horizontal and vertical axes, but hardly affected the contact region
with the iliac bone. Radiolucent lines according to DeLee were found in zo
ne I in 4, zone II in 6 and zone III in 7 cases. The Harris Hip Score impro
ved from 37-85 points. 1 revision was necessary 7 months postoperatively af
ter cup dislocation.