The dual-mobility POLARCUP: first results from a multicenter study.
Dislocation is a leading cause of revision after total hip arthroplasty (THA). To address this risk, dual-mobility technology was developed, which features a mobile polyethylene liner locked onto a femoral head and articulating in a metallic acetabular shell. This study reports clinical outcome data after implantation of the third-generation POLARCUP Dual-Mobility System (Smith & Nephew Orthopaedics AG, Rotkreuz, Switzerland). Primary THA procedures were performed in 150 patients. At 7.1 years, cumulative cup survival according to Kaplan-Meier was 97.4%. The mean Postel-Merle d'Aubigne score improved from 8.9 to 17.1 during the investigation. Two cups were revised at 5.4 and 6.4 years because of aseptic loosening. No dislocations were observed during follow-up. The current results confirm excellent early to midterm clinical outcomes for the POLARCUP Dual-Mobility System.
Bauchu
Philippe
P
Polyclinique des Minguettes, Vénissieux, France.
Bonnard
Olivier
O
Cyprès
Alain
A
Fiquet
Arnaud
A
Girardin
Philippe
P
Noyer
Daniel
D
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000706:statistics & numerical data*; D005260:Female; D005602:France / Q000453:epidemiology; D006617:Hip Dislocation / Q000453:epidemiology* / Q000517:prevention & control*; D006622:Hip Prosthesis / Q000706:statistics & numerical data*; D006801:Humans; D007593:Joint Instability / Q000453:epidemiology* / Q000517:prevention & control*; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011474:Prosthesis Design; D018570:Risk Assessment / Q000379:methods; D012307:Risk Factors; D016896:Treatment Outcome