上方関節唇損傷モデルの自然経過 : 肉眼的・組織学的観察 Natural Course of Superior Labral Injury in Animal Models : Macroscopic and Histological Observations
Purpose ) The purpose of this experimental study was to develop an animal model of a superior labral injury of the shoulder. Methods )<BR>A superior labral injury of the right shoulder was made in six adult beagle dogs, arthroscopically. Laceration of the superior labrum was made from 10: 30 to 12 o'clock. We observed macro and microscopic healing of the lacerated labrum three, six and twelve weeks postoperatively. Results ) There was no continuity of the fibrous tissue at the laceration site. Tissue ends were covered with a synovial layer underlined. by an avascular tendon. Disorientation of the collagen fibers was apparent. Partial degeneration of the tendon and proliferation of fibroblasts were visible at the tendon close to the enthesis. Fine vessels and fibroblasts penetrated the distal biceps tendon. Conclusion )<BR>There was no healing in the laceration site both macro and microscopically at three, six, and twelve weeks postoperatively. It is considered that repetitive traction force generated by biceps tendon makes laceration site unstable, which may prevent the healing process. According to this result, although there are differences between animals and human, injury of superior labrum will not be expected to heal.
- 肩関節 = Shoulder joint
肩関節 = Shoulder joint 24(2), 163-166, 2000-07-31