Knee instability after fractures of the intercondylar eminence of the tibia

Fifteen children with fracture of the intercondylar eminence of the tibia were reviewed. Three with type I or type II fractures had closed treatment. Twelve with type III fractures had open reduction and internal fixation. Follow-up examination included history and examination of the knee; nine had follow-up radiographs. The mean follow-up period was 7 years. Seven patients were free of symptoms; eight had varying degrees of pain, of which four had to avoid some athletic activities; and two described subluxation episodes. All had normal motion, four had atrophy, and all had some evidence of anterior cruciate ligament laxity. The anterior cruciate ligament probably stretches before its tibial attachment fractures. Even though the fracture heals in its normal position, mild degrees of anterior cruciate ligament laxity often will result.