Internal impingement in the shoulder.

  title={Internal impingement in the shoulder.},
  author={Gordon J. Edelson and Carol C Teitz},
  journal={Journal of shoulder and elbow surgery},
  volume={9 4},
Current wisdom holds that the acromion is a major factor in the development of rotator cuff impingement. From the examination of a large number of skeletal specimens (1232 shoulders), we conclude that this view may require some modification. It appears that internal impingement between the glenoid and the humeral head may also be a significant mechanism in the development of rotator cuff pathosis. We present here the evidence for this internal impingement, which is expressed in characteristic… CONTINUE READING