Weber S C, Caspari R B
University of California, Davis.
Arthroscopy. 1989;5(2):115-21. doi: 10.1016/0749-8063(89)90006-6.
The biomechanics of posterior dislocation of the shoulder was evaluated using nine cadaver shoulders. Each was arthroscoped, roentgenograms were obtained, and then each was dislocated in a testing device. Force displacement data was obtained during testing, and posttesting roentgenograms, arthroscopic evaluation, and subsequent open dissections were performed to evaluate the pathology created. Although instability was created in all cases with displacement of the humerus to the diameter of the humeral head, force displacement of the humerus to the diameter of the humeral head, force displacement curves did not show an inflection point, implying a continuum between subluxation and dislocation. All shoulders had posterior Bankart lesions or posterior capsular lesions, or both. Anterior pathology was not seen. Posterior instability is most likely a continuum between subluxation dislocation with progressive injury to the posterior capsule and attachments such as the labrum as the principal restraint to posterior displacement.
使用九个尸体肩部评估肩关节后脱位的生物力学。每个肩部均进行关节镜检查，获取X线片，然后在测试装置中使其脱位。在测试过程中获取力-位移数据，并在测试后进行X线片、关节镜评估以及随后的开放解剖，以评估所造成的病理情况。尽管在所有病例中均造成了肱骨移位至肱骨头直径的不稳定情况，但肱骨移位至肱骨头直径的力-位移曲线并未显示拐点，这意味着半脱位和脱位之间存在连续性。所有肩部均有后孟唇损伤或后关节囊损伤，或两者皆有。未发现前方病理情况。后向不稳定很可能是半脱位与脱位之间的连续性，随着后关节囊和诸如盂唇等附着结构作为后向移位的主要限制结构受到渐进性损伤。
