Kasperbauer J L
Department of Otorhinolaryngology, Mayo Clinic and Mayo Foundation, Rochester, Minnesota 55905, USA.
Laryngoscope. 1998 Nov;108(11 Pt 1):1704-11. doi: 10.1097/00005537-199811000-00021.
OBJECTIVES/HYPOTHESIS: To develop a model to investigate the biomechanics of the cricoarytenoid joint and establish stiffness, laxity, and range of motion of the cricoarytenoid joint in adult human larynges.
Laboratory investigation of freshly frozen larynges from adult humans, measuring the stiffness, laxity, and range of motion in intact and injured cricoarytenoid joints.
Eight normal-appearing frozen cadaver larynges from adult humans were studied. The cricoid cartilage was fixed to a load cell sensitive to forces in three dimensions. A probe was rigidly fixed to the arytenoid cartilage and attached to a frame to allow active rotation, rocking, and gliding of the arytenoid. A computer program simultaneously recorded forces generated by these motions and tracked the motion of the arytenoid in three dimensions. The joint was studied before and after injury to the posterior cricoarytenoid ligament, and the joint surfaces were digitized after completion of these studies.
A successful method of evaluating the biomechanical properties of the cricoarytenoid joint was developed. Comparing intact and injured joints confirmed that laxity and range of motion increased during rocking, gliding, and rotational motion when the cricoarytenoid ligament had been divided. Stiffness measurements for rocking, rotation, and gliding also were documented.
The model of study introduced in this report provides a significant and unique method of investigating the biomechanics of the cricoarytenoid joint, allowing insight into the basic joint characteristics and alteration in joint biomechanics related to injuries and surgical procedures. Dividing the cricoarytenoid ligament increases laxity and range of motion in sagittal rocking, gliding, and axial rotation. Secondary constraints on the joint provide significant stiffness of greater degrees of displacement. Further studies should provide insight into the significant secondary elements supporting the joint and into the mechanisms of cricoarytenoid injuries, as well as the effect of surgical procedures on the cricoarytenoid joint.
目的/假设：建立一个模型来研究环杓关节的生物力学，并确定成年人类喉部环杓关节的刚度、松弛度和活动范围。
对成年人类新鲜冷冻喉部进行实验室研究，测量完整和受损环杓关节的刚度、松弛度和活动范围。
研究了8个外观正常的成年人类冷冻尸体喉部。环状软骨固定在一个能在三维空间感知力的测力传感器上。一个探针被牢固地固定在杓状软骨上，并连接到一个框架上，以使杓状软骨能够进行主动旋转、摆动和滑动。一个计算机程序同时记录这些运动产生的力，并在三维空间中跟踪杓状软骨的运动。在环杓后韧带损伤前后对关节进行研究，并在这些研究完成后对关节表面进行数字化处理。
开发出了一种评估环杓关节生物力学特性的成功方法。比较完整和受损关节证实，当环杓韧带被切断时，在摆动、滑动和旋转运动过程中，松弛度和活动范围会增加。还记录了摆动、旋转和滑动的刚度测量值。
本报告中介绍的研究模型提供了一种重要且独特的方法来研究环杓关节的生物力学，有助于深入了解关节的基本特征以及与损伤和手术操作相关的关节生物力学改变。切断环杓韧带会增加矢状面摆动、滑动和轴向旋转时的松弛度和活动范围。关节的二级约束提供了更大位移程度下的显著刚度。进一步的研究应有助于深入了解支撑关节的重要二级结构、环杓关节损伤的机制以及手术操作对环杓关节的影响。
