title: Long-term outcome of 73 Zweymüller total hip prostheses with a screw cup in patients under 50 years of age.
abstract: Total hip arthroplasty in young patients is associated with high failure rates and the best option for this demanding group of patients remains controversial. We report the long-term results of 73 consecutive Zweymüller total hip arthroplasties with a titanium threaded cup and a polyethylene insert in 67 patients aged under 50 years at the time of surgery (mean 43 years, range 23-49). Independent assessment was performed clinically and radiographically, and Kaplan-Meier analysis was used to determine survival for different end-points. Three hips were revised for septic loosening, three cups for aseptic loosening and one hip because of a periprosthetic fracture. Three patients (3 hips) died and seven patients (8 hips) were lost to radiographic follow-up without any reoperation. The mean follow-up was 17.5 (15-21) years and the mean HHS was 90 (52-100). Survival with an end-point of revision for any reason was 89% (95% C.I. 85-93) and of revision for aseptic loosening was 94% (C.I. 95-99) at 17 years. Zweymüller total hip arthroplasty with a titanium threaded cup and a polyethylene insert showed good long-term results, even in this group of young patients.
authors: Department of Orthopaedics, Sint Maartenskliniek, Nijmegen, The Netherlands. v.busch@maartenskliniek.nl
authors: Vincentius J J F
authors: VJ
authors: Busch
authors: Martin H
authors: MH
authors: Pouw
authors: Armand M R P
authors: AM
authors: Laumen
authors: Job L C
authors: JL
authors: van Susante
authors: Antonius M J S
authors: AM
authors: Vervest
mesh_terms: D000328:Adult; D000367:Age Factors; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects / Q000295:instrumentation* / Q000379:methods*; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D007592:Joint Diseases / Q000175:diagnosis / Q000601:surgery; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D057068:Periprosthetic Fractures; D020959:Polyethylene; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D015996:Survival Rate; D014025:Titanium; D016896:Treatment Outcome; D055815:Young Adult
chemical_list: D020959:Polyethylene; D014025:Titanium