Wuelker N, Roetman B, Roessig S
Orthopaedic Department, Hannover Medical School, Germany.
J Shoulder Elbow Surg. 1995 Nov-Dec;4(6):462-7. doi: 10.1016/s1058-2746(05)80039-4.
A dynamic shoulder model was used to determine the pressure distribution under the acromion, the coracoacromial ligament, and the coracoid process with simulated active glenohumeral joint motion in cadaveric specimens. Computerized regulation of servo-actuator forces initiated controlled cycles of glenohumeral joint motion. Pressures were recorded by using capacitive sensors. Peak pressures averaged 56.6 N/cm2 and were located at the anterolateral border of the acromion in most specimens. Marked pressures were present under the coracoid process. Lack of force of the supraspinatus muscle resulted in an 8% decrease of mean coracoacromial pressures, lack of force on the subscapularis and infraspinatus/teres minor muscles in a significant 61% increase, and lack of force on all rotator cuff muscles in a significant 35% increase. After anterior acromioplasty was performed, mean coracoacromial pressures decreased 5%.
在尸体标本中，使用动态肩部模型，通过模拟肱盂关节的主动运动来确定肩峰、喙肩韧带和喙突下的压力分布。伺服致动器力的计算机化调节启动了肱盂关节运动的受控周期。使用电容式传感器记录压力。大多数标本的峰值压力平均为56.6 N/cm²，位于肩峰的前外侧边缘。喙突下存在明显压力。冈上肌力量缺失导致喙肩平均压力降低8%，肩胛下肌和冈下肌/小圆肌力量缺失导致压力显著增加61%，所有肩袖肌力量缺失导致压力显著增加35%。进行前肩峰成形术后，喙肩平均压力降低了5%。
