Abstract:Objective To explore the effect of arthroscopic double locking ring suture technique on shoulder joint function in small and medium-sized patients with rotator cuff tear.Methods From January 2020 to June 2022, 54 small and medium-sized patients with rotator cuff tear were selected and randomly divided into control group and treatment group with 27 cases in each group. The control group was repaired by conventional single-row modified Mason-Allen technique, while the treatment group was repaired by arthroscopic double locking ring suture technique. The operation time, blood loss, total hospitalization time, the clinical efficacy and recurrence rate 6 months after operation of the two groups were compared. The pain at different time points, abduction of shoulder joint, University of California at Los Angeles (UCLA) scale, American Shoulder and Elbow Surgeons (ASES) scale and Constant-Murley scale before and 3 months after operation were compared. The incidence of joint stiffness was followed up for 6 months.Results The operation time in the treatment group was significantly shorter than that in the control group, with statistical significance (P < 0.05). After 6 months' follow-up, the total excellent and good rate in the treatment group was significantly higher than that in the control group, with statistical significance (P < 0.05). At the 1, 3 and 6 months after operation, the visual analogue scale (VAS) of the two groups decreased compared with that before operation, and the treatment group was lower than that of the control group, with statistical significance (P < 0.05). Three months after operation, the UCLA scale, ASES scale and Constant-Murley scale of the two groups were higher than those before operation, and the treatment group was higher than that of the control group, and the differences were statistically significant (P < 0.05). At the 1, 3 and 6 months after operation, the abduction range of the patients in the two groups increased compared with that before operation, and the differences were statistically significant (P < 0.05). During the follow-up of 6 months, the incidence of joint stiffness in the treatment group was 3.70%, which was significantly lower than that in the control group (29.63%), and the differences were statistically significant (P < 0.05). After 6 months' follow-up, the recurrence rate in the treatment group was 0.00%, which was significantly lower than that in the control group (18.52%), with statistical significance (P < 0.05).Conclusion Small and medium-sized patients with rotator cuff tears can be treated by arthroscopic double locking ring suture technology, which can shorten the operation time, effectively relieve the pain of patients, improve shoulder joint mobility, improve shoulder joint function, reduce the incidence and recurrence rate of joint stiffness, and improve clinical efficacy.