FLANGED ACETABULAR COMPONENTS IN CEMENTED CHARNLEY HIP-ARTHROPLASTY -10-YEAR FOLLOW-UP OF 350 PATIENTS

A flanged socket was introduced by Sir John Charnley for use in his lo w-friction hip arthroplasty in 1976. Experimental evidence has suggest ed that the flange offers an advantage in terms of cement pressurisati on at the time of implantation. We have reviewed 302 primary Charnley arthroplasties followed for 9 to 11 years to determine the effect of t he flanged socket on the radiological appearance. The incidence of rad iological demarcation at the cement-bone interface is significantly re duced in early radiographs after the use of a flanged socket, and the advantage is maintained in the long-term results.