抄録
The purpose of this study was to clarify the recovery term of the shoulder muscle strength in patients who underwent arthroscopic Bankart repair with postoperative external rotational position. Ten patients underwent arthroscopic Bankart repair for recurrent anterior shoulder instability and were placed in a postoperative rotational position for 3 weeks. Before surgery, at 6 weeks, 3 months, and 6 months after surgery, the shoulder muscle strength at 90° of flexion, 90° of abduction, internal rotation and external rotation at 90° of flexion was measured with a Kin ComTM. Side-to-side differences were evaluated for each measurement, and the strength of the operated shoulder was compared with the preoperative strength. The strength in all directions of the operated shoulder was significantly reduced at 6 weeks after surgery. The strength of flexion, abduction and internal rotation was recovered to the preoperative level by 3 months after surgery, and the strength of external rotation did not change throughout the study period. The percent strength of the operated shoulder to the healthy side was 91% in flexion, 85% in abduction, 87% in internal rotation, and 83% in external rotation at 6 months after surgery. In this study, the recovery of the muscle strength of the Bankart repaired shoulders required more than 6 months. However, the clinical results showed that no patients had recurrence after surgery, indicating that the muscle strength at 6 months after surgery could be adopted as the index of postoperative rehabilitation.
