Factors affecting knee laxity following anterior cruciate ligament reconstruction using a hamstring tendon

Abstract Background The aim of the present study was to investigate the correlation between the pre-operative and intraoperative factors that predict postoperative knee laxity following anterior cruciate ligament (ACL) reconstruction using a hamstring tendon. Methods The subjects included 108 patients (male, n = 49; female, n = 59) with ACL-deficient knees who had undergone double-bundle reconstruction. The median time between injury and surgery (TBIS) was 27.5 weeks (range one to 504). The patients were divided into two groups according to the side-to-side difference (SSD) in anterior translation on a stress radiograph one year after undergoing the operation (Group A: SSD of Results The postoperative SSD values after one year were correlated with the TBIS ( r  = 0.28; P P P Conclusion Increased knee laxity was associated with the time between injury and surgery.