Effect of Rotator Interval Tear on Glenohumeral Stability: A Biomechanical Study

肩部旋轉肌交界處破裂對關節穩定度之影響：一種生物力學研究

許弘昌(Horng-Chaung Hsu) ； 孫世恆(Shih-Heng Sun) ； 羅震宇(Chen-Yu Lo) ； 羅宗平(Zong-Ping Luo) ； 安介南(Kai-Nan An)

《Mid-Taiwan Journal of Medicine》 4卷2期 (1999/06) Pp. 91-97

https://doi.org/10.6558/MTJM.1999.4(2).3

摘要

我們利用六具新鮮冰凍屍肩來研究肩部旋轉肌交界處破裂對穩定度之影響。研究結果顯示肩旋轉肌交界處之關節囊對於前方及下方之穩定度扮演著重要角色，而且與肩關節旋轉之角度息息相關。當在垂肩姿勢時，中性及內旋轉會加重下方之不穩定性；當在外展肩姿勢時，外旋轉會加重前方之不穩定性。總括而言，肩旋轉肌交界處關節囊對於穩定度扮演重要的角色，縫合該處將可控制及改善肩關節前方及下方之不穩定度。

關鍵字

生物力學 ； 旋轉肌交界處 ； 穩定度

並列摘要

Six freshly frozen cadaveric shoulders were used to investigate the effect of rotator interval tear on glenohumeral stability. Our results revealed that rotator interval capsule played an important role in inferior and anterior stabilities, which were critically related to the arm rotation. Neutral and internal rotation enhanced the downward displacement when the shoulder was in hanging position. On the other hand, external rotation enhanced the anterior displacement when the shoulder was in 90˚ of abduction. In conclusion, the capsule in the rotator interval plays an important role in glenohumeral stability. Imbrication of the rotator interval capsule may help to control inferior and anterior instabilities.

並列關鍵字

biomechanics ； rotator interval ； stability