Cementless total hip arthroplasty in young Chinese patients - A comparisonof 2 different prostheses

Sixty-one primary cementless total. hip arthroplasties were performed in 45 Chinese patients < 40 years old. There were 27 Anatomic Medullary Locking (AML, Depuy, Warsaw, IN) prostheses and 34 Porous Coated Anatomic (PCA, How medica, Rutherford, NJ) prostheses. The average follow-up was 7.6 years (ra nge, 3-11 years). Ten hips (16%) were reoperated; the reason was polyethyle ne wear with or without osteolysis in 7 hips. Osteolytic lesion was present in 34 hips (56%). The cumulative successful rate at 10 years was 67% using reoperation for any reason as the endpoint. The cumulative successful rate was 98%, however, if revision for aseptic loosening was used as the endpoi nt. The 2 prostheses did not show significant differences in most parameter s except that the PCA hips had significantly more acetabular loosening (P = .02) and periprosthetic osteolysis (P = .01).