Symbol: Ceramic-on-ceramic total hip arthroplasty

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Abstract

BACKGROUND:

At present, the ceramic manufacturing process has been improved constantly, and the ceramic-on-ceramic friction interface prosthesis has become the focus in the field of joint surgery and has achieved good clinical effects. However, with the wide application of ceramic-on-ceramic friction interface prosthesis, the prosthesis fragmentation and high-profile fricative appear.

OBJECTIVE:

To discuss the preliminarily clinical effects of ceramic-on-ceramic total hip arthroplasty.

METHODS:

Fifty patients less than 55 years old treated with ceramic-on-ceramic total hip arthroplasty between February 2006 and June 2010 in the First People's Hospital of Changshu were enrolled for follow-up visit. There were 19 male patients (20 hips) and 31 female patients (33 hips). The average age of the patients was 45 years. All the patients were followed-up for an average of 20 months (ranged 12-42 months). The clinical effects were evaluated with Harris score preoperatively and postoperatively. Radiographic follow-up included the outreach angle and anteversion angle. The prosthesis loosening was evaluated with Kawamura and Engh standard. Osteslytic lesions were defined according to the Engh standard, and heterotopic ossification was defined according the system of Brooker.

RESULTS AND CONCLUSION:

The average Harris score improved from (48.10±26.33) points preoperatively to (91.10±19.78) points postoperatively. No patient presented joint abnormal sound, prosthesis loosening, periprosthetic infection, observed wear, osteolysis or heterotopic ossification. One patient had renovation due to acetabular ceramic liner fragmentation. It showed that ceramic-on-ceramic total hip arthroplasty offers a promising choice for young patients with better bone quality, and the long-term effect needs to be further observed.

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