Abstract:Objective To compare the effect of arthroscopic subscapularis repair and subscapularis debridement in the treatment of Lafosse I subscapularis injury.Methods A total of 52 patients with Lafosse I subscapularis injury admitted to our hospital from January 2019 to January 2021 were selected and divided into a control group and a study group by random number table method, with 26 cases in each group. The control group was given arthroscopic subscapularis debridement, and the study group was given arthroscopic subscapularis repair. The postoperative follow-up was 12 months to observe the effect. The changes in the range of motion, pain, and shoulder function of the shoulder joint before and after surgery were compared between the two groups, and the incidence of surgical complications in the two groups was recorded.Result There was no significant difference in the difference of shoulder flexion, internal rotation and external rotation between the control group and the study group before operation and 12 months after operation (P > 0.05). The comparison of the visual analogue scale (VAS) of pain between the study group and the control group before surgery, 3 months after surgery, 6 months after surgery, and 12 months after surgery showed that there were differences in the VAS scores between different time points (P < 0.05). there was no difference in the VAS score between the study group and the control group (P > 0.05), and there was no difference in the change trend of the VAS score between the study group and the control group (P > 0.05). There was no difference in the difference between the control group and the study group before and 12 months after the operation in the University of California at Los Angeles (UCLA) score, the Brief Shoulder Test (SST) score, and the American Society for Shoulder and Elbow Surgery (ASES), difference was not statistically significant (P > 0.05). There was no statistical significance in the positive values of lift-off test, Napoleno test and Bear Hug test between control group and study group before and 12 months after surgery (P > 0.05). There was no significant difference in the total incidence of complications between the control group and the study group (P > 0.05).Conclusion Both arthroscopic subscapularis repair and subscapularis debridement are effective methods for the treatment of Lafosse I subscapularis injury. Both procedures can significantly increase the range of motion of the shoulder joint, reduce pain, and improve shoulder function. And security is good.