Postoperative dislocation after Charnley low-friction arthroplasty.
The dislocation rate after the Charnley arthroplasty with the 22 mm diameter femoral head was 0.8% in 3,820 arthroplasties performed before 1971. Over this era the annual rate ranged from 0.5% to 1.4% without any apparent explanation. Following the routine use of a low position for the socket in the acetabulum and the Long Posterior Wall design of socket, the dislocation rate fell to 0.4% over 4,706 arthroplasties and the annual dislocation rate over 4 years ranged between 0.5% and 0.2%.
D000077:Acetabulum; D000818:Animals; D001172:Arthritis, Rheumatoid / Q000150:complications / Q000601:surgery; D001178:Arthroplasty / Q000009:adverse effects* / Q000379:methods; D002415:Cats; D005260:Female; D006617:Hip Dislocation / Q000209:etiology* / Q000601:surgery; D006801:Humans; D007595:Joint Prosthesis / Q000009:adverse effects; D008297:Male; D010003:Osteoarthritis / Q000150:complications / Q000601:surgery; D012008:Recurrence