title: Long-term outcome of surface replacement with comparison to an age- and time-matched primary total hip arthroplasty cohort.
abstract: Surface replacement (SR) was introduced as a bone-conserving alternative to total hip arthroplasty (THA) 3 decades ago, then was abandoned due to polyethylene wear, stress shielding, and loosening. Improved bearing surfaces have renewed interest in SR. This study examined long-term SR outcome compared to an age- and time-matched THA cohort. Average age was 47 years at index procedure with 16 years follow-up (range, 5-28). Revision rates were 86% and 40% in SR and THA groups, respectively. However, at 20 years, with an end point of either intact SR or primary THA in the SR group, survivorship was 64% +/- 6% versus 39% +/- 7% unrevised in THA cohort. Contemporary and rapidly changing technology may result in longer-term SR success and improved THA longevity in young patients.
authors.affiliation: Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN 46202-5111, USA.
authors.forename: Russell D
authors.initials: RD
authors.lastname: Meldrum
authors.forename: G Peter
authors.initials: GP
authors.lastname: Maiers
authors.forename: Judy R
authors.initials: JR
authors.lastname: Feinberg
authors.forename: J Andrew
authors.initials: JA
authors.lastname: Parr
authors.forename: William N
authors.initials: WN
authors.lastname: Capello
authors.forename: Justin J
authors.initials: JJ
authors.lastname: Park
mesh_terms: D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip; D016025:Bone Transplantation; D005260:Female; D006618:Hip Dislocation, Congenital / Q000601:surgery; D006621:Hip Joint / Q000601:surgery*; D006801:Humans; D007592:Joint Diseases / Q000601:surgery; D008297:Male; D008875:Middle Aged; D017063:Outcome Assessment, Health Care; D012086:Reoperation; D012189:Retrospective Studies; D016896:Treatment Outcome