抄録
In the example of rotator cuff tears with a scapula malposition, especially the scapula was often accepted. This study investigated the characteristics of the rotator cuff tears with a scapula malposition. 100 consecutive shoulders in 100 patients who underwent rotator cuff repair were studied retrospectively. The age of the patients ranged from 33 to 79 (mean 62.4) years old and the man and woman ratio was the male 57 shoulders and female 43 shoulder. Roentgen-rays of an about the upper arm descent were photographed to preoperation, the straight line which connects a scapula socket inferior extremity and the angulus inferior scapula with a scapula side image was defined as the scapula length axis, and this angle was measured by making the angle with the straight line which connected the surface of the rib of the superior extremity located in that range, and the inferior extremity was the scapula angle of inclination. The peak of this angle facing up was the peak of a scapula anteversion group and facing down were the scapula retroversion group. Comparison examinations were performed about medical histories, range of motion and the cuff tear size at operation. The range of motion that internal rotation in 2nd position, in the retroversion group was significantly smaller than that in the anteversion group (P<0.05).The size of rotator cuff tear in the retroversion group was significantly larger than that in the anteversion group (P<0.05).The inclination of a scapula was understood to be the size of rotator cuff tear was one of the factors. By investigating the angle of gradient of a shoulder blade by a shoulder blade Roentgen-rays side image showed that it was possible to guess the size and shoulder joint function of a rotator cuff tear roughly.
