Although patients who underwent total hip arthroplasty experienced greater leg length discrepancy and less accurate restoration of offset compared with patients who underwent hip resurfacing arthroplasty, investigators of this retrospective study found no difference in clinical outcomes between the procedures.
Researchers compared 89 patients who underwent 36-mm ceramic-on-ceramic total hip arthroplasty (THA) to a group of 86 patients who underwent metal-on-metal hip resurfacing arthroplasty. At a minimum of 2 years postoperatively, researchers recorded patient-reported outcomes with the Oxford Hip Score (OHS), SF-12 physical and mental questionnaire, and a self-administered patient satisfaction survey.
Results showed the hip resurfacing arthroplasty group had a mean acetabular component size of 56 mm compared with 52 mm in the THA group. Investigators also discovered a larger mean native femoral head size in the resurfacing group compared with the THA cohort (50.3 mm vs. 46.6 mm).
Researchers found THA significantly increased femoral offset and leg length compared with hip resurfacing arthroplasty. However, there were no significant differences between the groups when comparing changes in acetabular offset or changes in vertical center of rotation, according to study results. Researchers also found comparable mean postoperative OHS between the groups, and SF-12 mental and physical components showed no significant differences. – by Casey Tingle
Disclosures: Parry received funding from the National Institute for Health Research (UK) and DePuy International Ltd. Please see the full study for a list of all other authors’ relevant financial disclosures.