title: Comparison of Acetabular Bone Resection, Offset, Leg Length and Post Operative Function Between Hip Resurfacing Arthroplasty and Total Hip Arthroplasty.
abstract: Controversy exists regarding the amount of acetabular bone resection, biomechanics and function of patients receiving either total hip arthroplasty (THA) or hip resurfacing arthroplasty (HRA). A cohort of patients undergoing 36 mm ceramic-on-ceramic THA (89) or metal-on-metal HRA (86) were compared. No difference was observed when the ratio of native femoral head size was compared to the implanted acetabular component size (1.15 ± 0.1 HRA c.f. 1.13 ± 0.1 THA). No difference was observed in acetabular offset, vertical centre of rotation or function (OHS mean 47 in both groups) but leg length discrepancy (1.8 mm c.f. 5.5 mm) and femoral offset did differ (0.6 mm c.f. 4.1 mm). This demonstrates that 36 mm ceramic-on-ceramic THA is not associated with more bone resection than HRA and achieves equivalent function whilst avoiding the problems of metal-on-metal bearings.
authors.affiliation: Muculoskeletal Research Unit, University of Bristol, Level 1 Learning and Research Building, Southmead Hospital, Westbury-on-Trym, Bristol, UK.
authors.forename: Michael C
authors.initials: MC
authors.lastname: Parry
authors.affiliation: Muculoskeletal Research Unit, University of Bristol, Level 1 Learning and Research Building, Southmead Hospital, Westbury-on-Trym, Bristol, UK.
authors.forename: James
authors.initials: J
authors.lastname: Povey
authors.affiliation: Muculoskeletal Research Unit, University of Bristol, Level 1 Learning and Research Building, Southmead Hospital, Westbury-on-Trym, Bristol, UK.
authors.forename: Ashley W
authors.initials: AW
authors.lastname: Blom
authors.affiliation: Muculoskeletal Research Unit, University of Bristol, Level 1 Learning and Research Building, Southmead Hospital, Westbury-on-Trym, Bristol, UK.
authors.forename: Michael R
authors.initials: MR
authors.lastname: Whitehouse
mesh_terms: D000077:Acetabulum / Q000601:surgery*; D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation* / Q000379:methods*; D002516:Ceramics; D005260:Female; D005269:Femur / Q000601:surgery; D005270:Femur Head / Q000601:surgery; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D007866:Leg / Q000601:surgery*; D007870:Leg Length Inequality / Q000601:surgery*; D008297:Male; D008670:Metals / Q000737:chemistry; D008875:Middle Aged; D011184:Postoperative Period; D011859:Radiography; D012189:Retrospective Studies; D012399:Rotation
chemical_list: D008670:Metals
keywords: acetabular resection; bearing; ceramic on ceramic; hip resurfacing arthroplasty; primary hip arthroplasty; total hip arthroplasty