Follow-up Study of Bioceram Type Total Hip Arthroplasty Postoperative Cases Over 8 Years Old.

The follow-up study of bioceram type cemented total hip arthroplasty performed using size 28mm alumina head with HDP-socket between September 1982 and September 1992 was reviewed.Twenty-four hips of 20 patients consisting of 18 women and 2 men were available for study. Their ages ranged from 36 to 84 years, with a mean age of 54.7 years. The post-operative average time was 12.7 years.The diagnosis at the time of surgery was OA of the hip for 18 cases, one rheumatoid arthritis, and one revision of acetabular central migration by bipolar cup. Clinical results were evaluated by the JOA score and radiological evaluation by Charnley's method for the acetabular side and Nagaya's method for femoral component.The clinical JOA score of 40.5 points improved to 81 point post operatively. At the 8th year of follow-up, the clinical JOA score changed to 73 points. Radiologically, 18 hips, or 75% of the cases showed good results after the 8th year. The mean wear rate of the cups against the alumina head was 0.12mm per year and not as good as other prosthetics.