抄録
Traumatic instability of shoulder often resulted from Bankart lesion after anterior shoulder dislocation. We showed the 4 cases of anterior inferior shoulder instability arm at the side. The 4 cases of this study (2 women, 2 men) were included. They did not feel apprehension of the shoulder at the 90 abduction external rotation. In the analysis of needle EMG, there was no paralysis of the deltoid muscle. The conservative therapy including inner muscle training, scapulo-thoracic muscles did not have any effect on the improvement of their symptoms. We performed an arthroscopic surgery in these cases. There were no injuries of rotator cuff and biceps tendon. MGHL were partially torn in the 1st er, and AIGHL was intact and the tension was normal in the 2nd er. In 2 of 4 cases the rotator interval was wide. In 3 of 4 cases MGHL was repaired on the glenoid rim by the suture anchors. After surgery, 1 of 4 (in the case of simple RI closure) remained the inferior instability of the shoulder. In this study after simple RI closure the inferior instability remained. In 3 of 4 cases, MGHL repair had the more effect on the stability of the inferior arm at the side. MGHL repair is one of the effective methods for the antero-inferior instability arm at the side.
