title: A comparison of two resurfacing arthroplasty implants: medium-term clinical and radiographic results.
abstract: The objective of this study was to perform a medium-term analysis comparing the clinical and radiographic outcomes of the CONSERVE® Plus (C+) and Birmingham Hip Resurfacing (BHR) arthroplasty systems. 137 hips were included in each cohort, with a mean follow-up of 60.0 ± 14.2 months and 63.3 ± 3.5 months in the C+ and BHR cohorts respectively. Latest review UCLA and HHS scores showed statistically significant improvements when compared with preoperative scores for both cohorts. UCLA and SF-12 physical component outcome scores were significantly different  (p<0.01 and p = 0.04, respectively). Median serum chromium and cobalt levels were  significantly increased in the BHR cohort (p = 0.001). Both cohorts demonstrated excellent Kaplan-Meier 5-year survival rates (96.9% in the C+ cohort, and 96.4% in the BHR cohort). Overall both implants appear to perform well in the medium term.
authors.affiliation: Adult Reconstruction and Joint Replacement Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, Weill Medical College of Cornell University, 535 East 70th Street, New York, NY 10021, USA. namd@hss.edu
authors.forename: Denis
authors.initials: D
authors.lastname: Nam
authors.forename: Patrick
authors.initials: P
authors.lastname: Maher
authors.forename: Brian J
authors.initials: BJ
authors.lastname: Rebolledo
authors.forename: Edwin P
authors.initials: EP
authors.lastname: Su
mesh_terms: D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D002857:Chromium / Q000097:blood; D003035:Cobalt / Q000097:blood; D019544:Equipment Failure Analysis; D005260:Female; D006304:Health Status; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D061825:Metal-on-Metal Joint Prostheses; D015207:Osteoarthritis, Hip / Q000503:physiopathology / Q000601:surgery; D011474:Prosthesis Design; D011475:Prosthesis Failure; D011859:Radiography; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012189:Retrospective Studies; D016896:Treatment Outcome
chemical_list: D002857:Chromium; D003035:Cobalt