Analysis of anterior tibial subluxation to the femur at maximum extension in anterior cruciate ligament-deficient knees:

Purpose:The factors affecting anterior tibial subluxation (ATS) have not yet been well examined. To assess the factors affecting ATS in anterior cruciate ligament (ACL)-deficient knees.Methods:One hundred twenty-four patients with unilateral ACL injuries were included. True lateral views of the ACL-deficient knee and contralateral normal knee were obtained during maximum extension using fluoroscopy under general anesthesia, and ATS was calculated as the side-to-side difference in the tibial position relative to the femur. Patients were divided into four groups according to the time from injury to surgery. To identify the factors affecting ATS, the following possible factors were assessed: (1) the time from injury to surgery, (2) presence of a medial meniscal injury, and (3) posterior tibial slope angle.Results:There was a positive correlation between the ATS ratio and the time from injury to surgery (r = 0.52). The ratio of the presence of a medial meniscus injury was significantly higher in patients who ...