Abstract: Objective     To investigate the effect of different surgical methods and different rehabilitation training methods in the treatment of ACL injury by arthroscopic anterior cruciate ligament (ACL) reconstruction with autologous hamstring tendon (ST/G).    Methods   From January 2017 to March 2018, 80 patients (80 knees) with ACL injury in our hospital were retrospectively analyzed. They were divided into four groups according to the operation and rehabilitation training methods, 20 cases in each group (20 knees), including a remnant-preserving professional rehabilitation group, a remnant-preserving routine rehabilitation group, a remnant-eliminating professional rehabilitation group and a remnant-eliminating routine rehabilitation group. The knee function score, stability test and proprioception measurement results of the four groups at the last follow-up were compared.   Results   All patients were followed up for 12 months. The Lysholm and IKDC scores of the four groups at the last follow-up were significantly higher than those before operation (P<0.001), and there were significant differences among the four groups (P<0.001). There were significant differences in position perception between the affected side and the healthy side in the four groups after operation (P<0.001). Based on Lysholm and IKDC scores, the increment of difference between the last follow-up and preoperative, the difference of position perception between the affected side and the healthy side were the dependent variables, and the operation mode and rehabilitation training mode were the independent variables for two-way ANOVA. The two independent variables had significant effects on knee function score and proprioception recovery (P<0.001). In addition, the increment of two scores in the remnant-preserving group was significantly higher than that in the remnant-eliminating group (P<0.001). The increment of two scores in the professional rehabilitation group was significantly higher than that in the routine rehabilitation group (P<0.001). The difference of position sense in the remnant-preserving group was significantly lower than that in the remnant-eliminating group (P<0.001), and the difference of position sense in the professional rehabilitation group was significantly lower than that in the routine rehabilitation group (P<0.001).    Conclusions    Arthroscopic reconstruction preserving the tibial remnant with four strand ST/G is an ideal surgical plan for the treatment of ACL injury. Postoperative rehabilitation of segmented and individualized professional kinesiotherapy can promote the recovery of knee function and proprioception, and can help patients recover and return to exercise as soon as possible.

Key words: Arthroscopy; ,  , Anterior cruciate ligament reconstruction; , Operation method, Rehabilitation training mode; ,  Influencing factors