title: Long-term results of Charnley low-friction arthroplasty for coxarthrosis with congenital hip dysplasia. 15 year follow-up study.
abstract: We studied more than fifteen-years' follow-up results of cases treated with low-friction arthroplasty (LFA) for coxarthrosis with congenital hip dysplasia. Thirty-four LFAs in 32 patients (2 males and 30 females) were followed up for an average of 18.8 years (range: 15 to 23.3 years). The mean age at surgery was 53 years (range: 36 to 67 years). In three patients, 4 hips needed revision surgery due to loosening of the prostheses. At the final follow up, using Hodgkinson's criteria, type 0 demarcation of the socket appeared in 9 cases, type 1 in 5 cases, type 2 in 4 cases, type 3 in 4 cases, and type 4 in 12 cases. According to Harris' criteria, there was no sign of loosening of the stem in 16 cases, however there was a possibility of loosening in 8 cases, probability in 2 cases, and definite loosening in 8 cases. The survival rate with socket loosening as the end point was 76.5% at the 10 year follow-up, 67.6% at 15-years' follow-up, and 50.9% at 20-years' follow-up. The survival rate with stem loosening as the end point was 82.4% at 10-years' follow-up, 79.4% at 15-years' follow-up, and 63.8% at 20-years' follow-up. The survival rate with prostheses loosening either socket or stem as the end point was 64.7% at 10-years' follow-up, 55.9% at 15-years' follow-up, and 34.6% at 20-years' follow-up. The survival rate with revision surgery as the end point was 100% at 10-years' follow-up, 94% at 15-years' follow-up, and 85.1% at 20-years' follow-up.
authors.affiliation: Department of Orthopaedic Surgery, Okayama University Medical School, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Nagano
authors.forename: H
authors.initials: H
authors.lastname: Inoue
authors.forename: M
authors.initials: M
authors.lastname: Usui
authors.forename: S
authors.initials: S
authors.lastname: Mitani
authors.forename: T
authors.initials: T
authors.lastname: Satoh
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation / Q000379:methods*; D001843:Bone Cements; D005260:Female; D005500:Follow-Up Studies; D006618:Hip Dislocation, Congenital / Q000601:surgery*; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery*; D011183:Postoperative Complications; D011475:Prosthesis Failure; D011859:Radiography; D012044:Regression Analysis; D018709:Statistics, Nonparametric; D016019:Survival Analysis; D016896:Treatment Outcome
chemical_list: D001843:Bone Cements