Follow-up evaluation
POSTOPERATIVE COMPLICATIONS
All enrolled 70 cases were followed up for 24–91 months (average 60.3 ± 17.9 months). Follow-up results showed that all patients had no intraoperative and postoperative complications. Compared with the preoperative period, the knee flexion angle, IKDC score, Lysholm score, and Tegner score were significantly improved in both groups at the last follow-up (P < 0.05). In addition, the knee flexion angle, IKDC score, Lysholm score, and Tegner score of patients in the remnant-preserved group were significantly higher than those of patients in the simple reconstruction group at the last follow-up (P < 0.05; Table 
Comparison of knee joint function scores between the two groups
Comparison of knee stability between the two groups at the last follow-up