Objectives:In patients with femoroacetabular impingement (FAI), acetabular rim trimming removes the offending cause of pain in patients with pincer-type and mixed-pincer-cam type pathology and helps protect repaired damaged labrum from further injury. Although the clinical benefit of arthroscopic acetabular rim trimming in FAI patients is well established, the threshold at which excessive rim resection results in abnormal hip contact pressures from iatrogenic acetabular dysplasia has never been studied. The purpose of the present study was to investigate the changes in contact areas, contact pressures and peak forces within the hip joint with sequential acetabular rim-trimming.
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