Isolated Acetabuloplasty for Femoroacetabular Impingement: Favorable Patient-Reported Outcomes and Sustained Survivorship at Minimum 5-Year Follow-Up

To evaluate minimum 5-year outcomes and conversion rate to total hip arthroplasty (THA) for the treatment of femoroacetabular impingement (FAI) syndrome with an isolated acetabular osteoplasty. Patients undergoing hip arthroscopy with an isolated acetabular osteoplasty from March 2009 to June 2014 for FAI syndrome with pincer and/or cam morphology and a labral tear were identified. Those who underwent femoroplasty or prior ipsilateral hip surgery or who had previous hip conditions, ipsilateral hip dysplasia, or a Tönnis grade higher than 2 were excluded. Patient-reported outcomes (PROs) collected included Patient-Reported Outcomes Measurement Information System (PROMIS) scores specific to physical functioning and pain interference, modified Harris Hip Score, International Hip Outcome Tool 12, Hip Outcome Score–Activities of Daily Living, Hip Outcome Score–Sport-Specific Subscale, and Numeric Pain Rating Scale. Patients were also queried about secondary surgical procedures and conversion to THA. We identified 86 patients at minimum 5-year follow-up (average, 7.4 years). The average patient age was 39.8 ± 12.3 years, 70.9% of patients were female, and 7% of patients had Tönnis grade 2. The mean PRO scores were 52.0 ± 8.9 for the PROMIS physical functioning score, 39.6 ± 7.5 for the PROMIS pain interference score, 78.7 ± 12.0 for the modified Harris Hip Score, 73.3 ± 23.1 for the International Hip Outcome Tool 12 score, 89.9 ± 12.0 for the Hip Outcome Score–Activities of Daily Living, and 81.4 ± 21.0 for the Hip Outcome Score–Sport-Specific Subscale. Of the patients, 72.1% achieved the patient acceptable symptomatic state (PASS) according to previously established PASS scores for FAI syndrome treated with hip arthroscopy at minimum 5-year follow-up. The overall rate of revision arthroscopy was 3.5%, and the rate of conversion to THA was 5.8%. An isolated acetabular osteoplasty can provide sustained clinical benefits for the treatment of FAI syndrome with labral tears, with good to excellent PROs and PASS rates and a low rate of conversion to THA at minimum 5-year follow-up. Level IV, case series.