title: Long-term results of cemented Charnley low-friction arthroplasty in patients aged less than 30 years.
abstract: The results of cemented Charnley low-friction arthroplasty in patients aged less than 30 years are presented. Eighty-three arthroplasties were performed on 55 patients with an average age of 24.9 years (range, 17-29 years) and an average follow-up period of 240 months (20 years; range, 62-360 months). There were 2 nonfatal pulmonary emboli, 2 cases of deep sepsis, and 3 fractured femoral implants. Twenty-eight acetabular components migrated (34%), 25 have been revised (30%), and the average annual acetabular wear rate was 0.12 mm. Sixteen femoral implants subsided (19%), and fracture of the tip of the cement mantle occurred in 8 hips (10%). Nineteen femoral components (23%) were revised; femoral osteolysis was seen in 15 hips (18%) and changes in the calcar in 33 (38%). Acetabular component survivorship was 92% (95% confidence interval, 85-98%) at 10 years, 70% (60-81%) at 20 years, and 68% (57-79%) at 25 years, with the figures for the femoral implant being 93% (87-98%), 76% (66-86%), and 73% (62-85%), respectively.
authors.affiliation: Centre for Hip Surgery, Wrightington Hospital, Wigan, Lancashire, United Kingdom.
authors.forename: D H
authors.initials: DH
authors.lastname: Sochart
authors.forename: M L
authors.initials: ML
authors.lastname: Porter
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D019644:Arthroplasty, Replacement, Hip; D002484:Cementation; D005260:Female; D006801:Humans; D015993:Life Tables; D008297:Male; D012086:Reoperation; D016896:Treatment Outcome