EP7.11 Outcomes of Core Muscle Injury Repairs Among Athletes with Asymptomatic Borderline Dysplasia are No Different than those with Normal Acetabular Coverage

Abstract Introduction Core muscle injuries are among the most common injuries in sports. The boney morphology of the hip joints, particularly femoroacetabular impingement, has been shown to correlate with these injuries. We sought to understand how borderline hip dysplasia affects the outcomes of core muscle repairs. Methods This retrospective cohort study was performed by selecting athletes who underwent surgical repair of core muscle injuries with lateral center edge angles (LCEA) of 18-25°. Included were male Division 1 NCAA or professional athletes. Exclusion criteria include symptoms or physical exam signs of symptomatic hip involvement, and prior hip or core muscle surgery. The primary outcome was weeks to return to full play. Secondary outcomes included subsequent hip surgery or recurrent muscle injury. Outcomes were compared with age- and sport-matched athletes with normal (LCEA >25°) acetabular coverage. Results Fourteen athletes were included for study. There was no difference in return to play between athletes with borderline dysplasia and those with normal acetabular coverage (8.2±3.0 vs. 7.3±2.4 (t= 0.90, p =0.38)). None of the 14 athletes in either group had reinjuries or required hip surgery within 6 months of follow-up. Discussion This limited, retrospective study suggests that the presence of borderline hip dysplasia does not significantly affect the outcomes for core muscle repairs. Future studies will include larger sample size and additional metrics such as Beighton scores, acetabular/femoral version, and modified Harris Hip Scores.