Abstract:To compare the effect of two kinds of sutures under arthroscopy on patients with supraspinatus tendon injury. Methods 136 patients with suprascapal tendon injuries treated from January 2015 to April 2018 were selected. The patients were randomly divided into control group (n = 68) and observation group (n = 68). The control group was treated with single-row modified Mason-Allen suture under arthroscopy, and the observation group was repaired with an arthroscopic modified suture bridge technique. The shoulder joint activity, visual analogue scale (VAS) score, ASES score and Constant score were compared between the two groups. Results There was no significant difference in internal rotation, external rotation, flexion and abduction, resting VAS, activity VAS score, ASES score and Constant score between the two groups before treatment (P > 0.05). Internal rotation, external rotation, flexion and abduction of shoulder joints, resting VAS, active VAS score, ASES score, and Constant score were all significantly improved before treatment, and the observation group was superior to the control group. The difference was statistically significant (P < 0.05). Conclusion The repair of supraspinatus tendon injury by modified suture bridge technique can effectively relieve pain and improve shoulder motion and function.