Bankart Bristow変法術後の経時的肩関節内外旋筋力の検討

抄録

The purpose of this study was to investigate the early phase of the muscle power recovery in the shoulder rotational motion after open Bankart and modified Bristow procedure to make a basis for the post-operative rehabilitation program. The early phase of the isokinetic concentric shoulder rotational muscle strength was evaluated in 18 patients treated with open Bankart and modified Bristow procedure. The muscle strength was measured at 1.5,3,4.5,6, and 12 months after the surgery. They were all male Japan Self Defense Force personnel, and their average age at the surgery was 26 years. We measured the peak torques in both shoulders at 60, and 180 deg/sec angular velocities, and calculated the peak torque ratio. The peak torque decreased 50%at 1.5 months after the surgery, but rapidly increased to the preoperative level by 4.5 months. The peak torque ratio decreased to 50% at 1.5 months after the surgery, and gradually increased to 60% at 3 months,70% at 4.5months, and 80% at 6 months. The muscle power recovered as much as the pre-operative level at 12 months after the surgery. The shoulder rotational muscle power is considered to contribute to the stability after surgery for a patient with an anterior recurrent dislocation of the shoulder. We made a postoperative rehabilitation program, however, the effect of the rotational muscle power was not considered in the program. This study showed that the muscle power was well- recovered at the same time as the rehabilitation program, however, the high level of sports activities should be waited for with the peak torque ratio recovery.