Prior Femoroacetabular Osteoplasty does not Compromise the Clinical Outcome of Subsequent Total Hip Arthroplasty

Abstract Introduction Total hip arthroplasty (THA) is the most effective treatment option for patients with symptomatic osteoarthritis following a prior femoroacetabular osteoplasty (FAO). This study evaluated clinical outcomes of THA following a prior FAO and compare the results to a matched group of patients who underwent THA with no prior surgical procedures in the affected hip. Methods By reviewing our prospectively maintained database, we identified 74 hips (69 patients) who underwent THA following previous FAO between 2004-2017. They were matched 1:3 to a control group of primary THA with no history of any procedures on the same hip based on age, sex, BMI, date of surgery, Charlson comorbidity, surgical approach, acetabular and femoral component type. At minimum 2-year follow-up, modified Harris Hip Score (mHHS), 90-days readmission, and revision THA for any reason were compared between the groups. Results The median time interval between FAO and subsequent THA was 1.64 years. There was no significant difference in preoperative HHS between patients in the case and control cohort. At the latest follow-up, the median mHHS was 77.6 in the case group and 96.2 in the control and the difference was not statistically significant. None of the patients in the case group developed infection. 7 patients in the case group required additional procedures at any point, compared to 15 in the control. Conclusion THA following prior FAO has similar outcomes to primary THA in patients with no prior procedures in the affected hip. THA can be performed safely with excellent outcome in patients with a history of FAO.