抄録
The object of this study was to investigate the shoulder rotational muscle power recovery after arthroscopic Bankart procedure. Isokinetic concentric shoulder rotational muscle strength was evaluated in 19 patients diagnosed with the recurrent dislocation of the glenohumeral joint and treated with arthroscopic Bankart repair. We measured the peak torques at 60, and 180° /sec angular velocities at the pre- and 1.5, 3, 4.5, 6, 9, 12 months post-operatively, and calculated peak torque to the pre-operative ratios (pre-op. ratio), and the peak torque to body weight ratios (weight ratio). The pre-op. ratios, and the weight ratios significantly decreased to 60% at 1.5 months after the surgery on both the 60 and 180° /sec angular velocity conditions during the external and internal rotation exercise. They rapidly increased to the preoperative level at three months, and kept at a high level until 12 months postoperatively. We evaluated the shoulder rotational muscle power recovery after open Bankart & Bristow procedure, and concluded that the muscle power recovery was required more than 6 months after the surgery. Using the arthroscopic Bankart repair, the muscle strength was recovered to the preoperative level by three months after the surgery.
