Malicky D M, Soslowsky L J, Kuhn J E, Bey M J, Mouro C M, Raz J A, Liu C A
Department of Mechanical Engineering, Valparaiso University, IN 46383, USA.
J Biomech Eng. 2001 Oct;123(5):425-31. doi: 10.1115/1.1394197.
The antero-inferior capsule (AIC) is the primary restraint to antero-inferior glenohumeral dislocation. This study utilizes a biomechanical model to determine the total strain field of the AIC in a subluxed shoulder. Strains were calculated from two capsule states: a nominal strain state set by inflation and a strained state set by subluxation. Marker coordinates on the AIC were reconstructed from stereoradiographs and strain fields calculated. Peak strain on the glenoid side of the AIC was significantly greater than the humeral side and strain fields were highly variable. This study reports an accurate method for measuring planar strains in a three-dimensional membrane.
前下关节囊（AIC）是防止肩肱关节前下脱位的主要限制结构。本研究利用生物力学模型来确定半脱位肩部中AIC的总应变场。应变由两种关节囊状态计算得出：一种是通过充气设定的名义应变状态，另一种是通过半脱位设定的应变状态。通过立体X线照片重建AIC上的标记坐标并计算应变场。AIC关节盂侧的峰值应变显著大于肱骨侧，且应变场变化很大。本研究报告了一种测量三维膜中平面应变的准确方法。
