Abstract:

BACKGROUND: Dislocation after total hip replacement is still one of the main complications of traditional metal-on-polyethylene total hip replacement. Metal-on-metal total hip arthroplasty with large diameter head has a good stability, suitable for young and active patients with higher requirement of movement.
OBJECTIVE: To evaluate the short-term therapeutic effect of total hip arthroplasty with metal-on-metal bearings and large diameter head hip prosthesis.
METHODS: A retrospective analysis was done in 48 patients (54 hips) with advanced stage hip disease treated by primary total hip arthroplasty with metal-on-metal bearings and large diameter head hip prosthesis. The mean diameter of femoral head prosthesis was 44 mm (38 to 48 mm). The postoperative short-term effect was evaluated with Harris scores and X-ray plain.
RESULTS AND CONCLUSION: All patients received the follow-up of 18 to 36 months. The mean Harris hip score was 93.6 (91 to 96) at the last follow-up. The mean range of hip motion was 232.6° (182° to 257°) at the last follow-up. There were no infection, no hip and thigh pain, no vessel and nerve complications, no dislocation. Post-opretive X-ray plain revealed fine position of the prostheses without any loosening. Short-term results show that large diameter metal-on-metal total hip arthroplasty has advantages of lower wearing, large range of motion and few dislocations.