Poster 296: Incidence and Risk Factors for Contralateral Patellofemoral Instability

Objectives: Background: Patellofemoral joint instability is common in young athletes and often requires surgical intervention. Incidence risk factors for ipsilateral recurrence have been more discussed the literature than contralateral events. Purpose: To evaluate incidence patellofemoral patients who undergone patellar stabilization surgery. Methods: This retrospective study included 543 had medial ligament reconstruction and/or Fulkerson osteotomy as management lateral instability. The medical records of these were examined to non-surgical knee. Available imaging each affected knee was patella alta, skeletal maturity, trochlear dysplasia, tibial tubercle groove (TT-TG) distance, posterior collateral (TT-PCL) distance. Demographic such BMI, age, sex also examined. A second arm done excluding with previous history bilateral instability, assessing using same methods. yielded information about “new onset” post-stabilization Results: Of examined, 205 (37.8%) evidence Patella alta (OR, 2.4), immaturity 2.67), younger age (p<0.0001) associated increased Sex, TT-TG TT-PCL dysplasia not In study, 63 out 401 (15.71%) new onset post-surgery. Skeletal 3.65) found be Conclusions: 37.8%. Lower immaturity, new-onset 15.71% only immaturity.