Clinical Follow - up Study of Cemented THR

Kim, Key Yong; Cho, Duck Yun; Lee, Joong Myung; Jeon, Hoe Seung

Abstract

Cemented total hip replacement is one of the established methods of treatment in various hip joint disorder in adults in spite of the high incidence of the complications. The authors report a clinical experience of 39 patients(47 hips) among the 111 patients (126 hips) who were treated with cemented total hip replacement from May 1973 to August 1985 at the Department of Orthopaedic Surgery of National Medical Center. The follow-up period ranged from 3 years to 11 years and 6 months with an average of 6 years and 9 months. The results are follows : 1. The functional results were good or excellent in 73% using Harris Hip Score. 2. The rate of mechanical loosening was 34.8% in femoral components, and 28.3% in acetabular components, and 19.6% in both components. 3. Average rate of socket wear was 0.243mm/yr in Charnley type prosthesis and 0.32mm/yr in Miieller type prosthesis. 4. Age, types of prosthesis, follow-up period showed stastical correlation with functional results(p<0.05). 5. Follow-up periods affected the incidence of radiographic loosening(p<0.05). 6. The relationship between follow-up periods and wear was stastically significant(p<0.05). 7. Septic loosening occurred in one case, who was eventually given Girdle-stone operation. 8. The rate of trochanteric non-union was 16.6% and ectopic bone formation occurred in 23.4%.