Authors: Thomas P Gross Fei Liu Lee Webb
Publish Date: 2010/11/25
Volume: 469, Issue: 6, Pages: 1554-1559
Abstract
Various clinical and biomechanical studies suggest certain acetabular positions may be associated with higher wear and failure rates in modern metalonmetal hip resurfacing arthroplasties However there are no widely available reliable and costeffective surgical techniques that ensure surgeons are able to place an acetabular component within the safe range of inclination angles after hip resurfacing surgeriesThe study group included the first 100 resurfacing arthroplasties performed after we started routinely checking the intraoperative acetabular inclination angles The acetabular component was repositioned if the intraoperative acetabular inclination angle was out of the target range of 30° to 50° The control group included the previous 100 resurfacing arthroplasties performed without the benefit of intraoperative radiographs A posterior minimally invasive surgical approach was used in both groups Demographics and diagnoses were similar in both groupsThe average ± SD difference between the intraoperative and 6week radiographs was 27° ± 25° The acetabular inclination angles at 6week followup were within the targeted range more frequently in the study group than in the control group outliers 4 versus 29One of the authors TPG has received royalties from Biomet Inc Warsaw IN The remaining authors certify that they have no commercial associations eg consultancies stock ownership equity interest patent/licensing arrangements etc that might pose a conflict of interest in connection with the submitted article
Keywords: