Analysis of prosthetic efficacy in early Chinese biotype total hip arthroplasty / 中国矫形外科杂志

ABSTRACT

[Objective]To investigate the efficacy of early Chinese biotype total hip arthroplasty(THA) in clinical application.[Methods]From October 1997 to March 2004,THA was done in 46 patients(49 hips) with early Chinese biotype.The efficacy was evaluated according to the clinical score and X-ray photographs.[Results]Forty-six patients were followed up for 5~11.5 years(average 8.5 year).The mean Harris hip score improved from 38(35~50) points preoperatively to 82(70~90) points at final follow-up.The imaging observation showed that prothesis loosening occurred in 9 cases.There were hip dislocation in 3 cases.One dislocation occurred on the way to the ward after operation,and the other 4 events occurred after the patients were discharged.Close reduction was all successful.There was 1 case of ectopic ossification,Brooker classification was GradeⅠ.One patient had hip pain and limping.The X-ray photographs showed that there was obvious osteoporosis,but no prothesis loosening occurred.No infection was found.The total good to excellent result was 73.9%.[Conclusion]The early Chinese biotype total hip arthroplasty can relieve the pain.However,the design and the moding parts of the domestic prosthesis need to be modified in order to improve the prosthetic efficacy.