title: Clinical Performance of the ASR and ReCap Resurfacing Implants—7 Years Follow-Up.
abstract: We perform a non-randomized, consecutive pilot study on the ASR and ReCap resurfacing hip implants and have completed 7 years follow-up. Forty-six non-osteoporotic patients with hip osteoarthritis and anatomical conditions suitable for resurfacing were divided into 2 equal groups and operated sequentially, starting with the ASR implants. Sixteen patients operated with ASR and 19 patients with ReCap have been followed-up. There were no significant differences between the two groups preoperatively as to physical function, pain, or femoral BMD. The serum concentrations of cobalt and chromium were higher in the ASR group from 1/2 to 7 years postoperatively. Five of 16 ASR implants have been revised, and none of the ReCap implants. BMD below the femoral component increased in both groups.
authors.affiliation: Department of Orthopaedic Surgery, Frederiksberg University Hospital, Frederiksberg, Denmark.
authors.forename: Arne
authors.initials: A
authors.lastname: Borgwardt
authors.affiliation: Department of Orthopaedic Surgery, Frederiksberg University Hospital, Frederiksberg, Denmark.
authors.forename: Lotte
authors.initials: L
authors.lastname: Borgwardt
authors.affiliation: Department of Clinical Physiology and Nuclear Medicine, Copenhagen, Denmark.
authors.forename: Lise
authors.initials: L
authors.lastname: Borgwardt
authors.affiliation: Department of Clinical Physiology and Nuclear Medicine, Herlev University Hospital, Herlev, Denmark.
authors.forename: Bo
authors.initials: B
authors.lastname: Zerahn
authors.affiliation: Department of Orthopaedic Surgery, Frederiksberg University Hospital, Frederiksberg, Denmark.
authors.forename: Sandra D
authors.initials: SD
authors.lastname: Fabricius
authors.affiliation: Department of Orthopaedic Surgery, Frederiksberg University Hospital, Frederiksberg, Denmark.
authors.forename: Søren
authors.initials: S
authors.lastname: Ribel-Madsen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000706:statistics & numerical data; D015519:Bone Density; D002857:Chromium / Q000097:blood; D003035:Cobalt / Q000097:blood; D005260:Female; D005269:Femur / Q000502:physiology / Q000601:surgery; D005500:Follow-Up Studies; D006622:Hip Prosthesis / Q000009:adverse effects / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery*; D010865:Pilot Projects; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012086:Reoperation
chemical_list: D002857:Chromium; D003035:Cobalt
keywords: chromium; cobalt; hip resurfacing; metal-on-metal hip; prosthesis failure; total hip arthroplasty