Abstract:

BACKGROUND: Total hip replacement has been widely used in the treatment of severer hip diseases in China. However, most of prostheses are designed according to Caucasian osteometric measurements, whether those prostheses are suitable for Orientals is still in dispute. It is emerging to design prostheses for Orientals, there are few reports addressing therapeutic effect after replacement. 
OBJECTIVE: To follow up the long-term results of total hip replacement using domestic designed dual-assembly total hip prosthesis.
METHODS: Totally 30 patients (33 hips) who underwent total hip replacement at the Department of Orthopaedic Surgery, China-Japan Union /Affiliated Hospital of Jilin University, from June 1987 to December 1996, were followed up. The designed dual-assembly total hip prosthesis was produced by Central Iron & Steel Research Institute, which was similar to bipolar prosthesis with a polyethylene acetabular cup. First generation cementing techniques were applied. The average age at the time of the operation was 56.5 years (30-81 years) and the average follow-up period was 8.5 years (5.0-14.4 years). Standard anteroposterior radiographs of the hip and clinical examinations were used to analyze therapeutic efficacy.
RESULTS AND CONCLUSION: The total excellent and good rate was 68.6%. The imaging examination showed that there were 16 hips (48.5%) had aseptic loosening and 11 hips (33%) had heterotrophic bone formation. Additionally, two cases suffered from infection and one case suffered from dislocation. The utilization of prosthesis achieved certain curative effects. However, the design and cement technology have problems due to limitation of conditions, which should be solved in further experiments.