Effect of Scapula Orientation on Shoulder Internal Impingement : A Biomechanical Study on Cadaveric Model

肩胛骨方向对肩部内撞击的影响：尸体模型的生物力学研究

基本信息

批准号：
21700475
负责人：
MIHATA Teruhisa
金额：
$ 2.33万
依托单位：
Osaka Medical College
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2009
资助国家：
日本
起止时间：
2009 至 2010
项目状态：
已结题

项目摘要

Background : Although deviations in scapular orientation are thought to result in shoulder injuries in throwing athletes, the biomechanical mechanism underlying shoulder injuries in throwing athletes caused by altered scapular orientation has not been clarified.Methods : Seven fresh frozen cadaveric shoulders were evaluated at 90° abduction, with the humerus externally rotated from 90° to the maximum angle, to simulate the late cocking phase of the throwing motion. Loads were applied to the deltoid, pectoralis major, latissimus dorsi, teres major muscles, and all rotator cuff muscles. Contact pressure in the glenohumeral joint was measured using a pressure sensor. The area of internal impingement was calculated based on three-dimensional location data. Glenohumeral contact pressure and area of impingement were compared between 20°, 30°, and 40° of internal scapular rotation, between 20°, 30°, and 40° of upward scapular rotation, and between 0° and 10° of anterior scapular tilt. Data we … More re analyzed using repeated measures ANOVA with Tukey's post hoc test (P<0.05).Results : Contact pressure was detected in the posterior glenohumeral joint. The glenohumeral contact pressure and internal impingement area increased with increasing internal scapular rotation. The glenohumeral contact pressure (by 43.4%, p<0.01) and impinged area (by 43.1%, p<0.05) at 40° of internal scapular rotation were significantly greater than those at 20°of internal scapular rotation. Decreasing upward scapular rotation resulted in an increase in internal impingement area. The impinged area at 20° (by 38.1%, p<0.0001) and 30° (by 28.9%, p<0.01) of upward scapular rotation were significantly greater than that at 40° of upward scapular rotation.Conclusions : Increasing internal scapular rotation and decreasing upward scapular rotation significantly increase glenohumeral contact pressure and/or impinged area of the rotator cuff tendon between the greater tuberosity and glenoid during simulated throwing motion.Clinical Relevance : Shoulder internal impingement is accentuated by increasing internal rotation or decreasing upward rotation of the scapula during throwing motion. Less

背景：Althooth Devialar取向是要投掷运动员，生物力学的潜在肩部受伤在投掷因肩cap骨方向改变而引起的运动员的肩部受伤尚未澄清。方法：C肩部以90°的外观进行评估，并从90°旋转，从90°旋转。至最大角度，到t的晚期cocking阶段，t the The t ltoid，胸肌主要，龙肌，主要肌肉和所有肩袖肌肉，基于内部障碍的面积。尺寸位置TA。倾斜。通过Tukey的事后测试（P <0.05）。在后孔臂关节中检测到接触率。在40°的内部肩cap骨旋转时，撞击面积（43.1％，p <0.05）显着，在内部撞击区域增加了。，p <0.0001）和30°（28.9％，p <0.01）向上的肩cap骨旋转显着，即在40°上向上肩cap骨旋转时。裂痕eRNAL肩cap骨旋转，并降低肩cap骨旋转，从IMPINGED AREA OFEA OFEA OFEA OF THE OFEA OFEA OFEA OFEA OFEA OFEA some Rotator Cuff Tween The Greater Tuberosity and Glenoid During Throwing Motion.Clinical Relevance: NTUATED by Increasing Internal Rotation or Decreasing Upward Rotation of the Scapula During Thing Motion.