Review Question - QID 217265

A 12-year-old male presents to the pediatric emergency department with left hip pain and inability to ambulate. His mother reports he slipped and fell in the kitchen earlier when he was roughhousing with his sibling. Since the fall, the patient has been unable to bear weight to the affected leg. He reports chronic pain in the left hip but has not seen a provider for this complaint. His imaging reveals a grade II slipped capital femoral epiphysis. He undergoes an urgent in situ pinning of the left hip followed by prophylactic pinning of the right hip. He presents four years post-op with left hip pain that is worse with movement. His current radiographs reveal chondrolysis of the affected hip. Which of the following likely contributed to the complication this patient is experiencing?