Dynamic and Static Analysis of Rotator CUFF (Supraspinatus Tendon) with Tensile Test

通过拉伸测试对肩袖（冈上肌腱）进行动态和静态分析

基本信息

批准号：
02670668
负责人：
FUKUDA Hiroaki
金额：
$ 1.34万
依托单位：
Tokai University School of Medicine
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

Objective : The bursal-side (B-S) and the joint-side (J-S) layers of the supraspinatus tendon may be torn in the different mechanism. In this study, we attempted to clarify the difference of the histological characteristic and the biomechanical property between both layers with reference to the etiology of the rotator cuff tear.Materials and Methods : 50 supraspinatus tendons were resected from bilateral shoulders of fresh cadavers (28-79 yrs.). Histological sections from 10 supraspinatus tendons were made in the coronal and four cross planes at the musculotendinous junction, proximal and distal points of the critical portion and the insertion. In the biomechanical study, 40 supraspinatus tendons were divided horizontally into the B-S and J-S layers of equal thickness. Quasistatic tensile test was performed foe each layer and the elongation rates in the musculotendinous, tendinous and insertional portions were measured.Results : The tendon fibers of the supraspinatus were thicker in the B-S layer than in the J-S layer. The fibers in the J-S layer tapered toward the insertion. In the tensile test, the destroying stress to the B-S layer was greater than that to the J-S layer while the elastic modulus was lower in the former. The tendinous portion had the largest elongation rate in the B-S layer, while the J-S layer elongated evenly. 'Gross rupture' occurred in the proximal portion of the tendon in the B-S layer and near the insertion in the J-S layer. 'Concealed rupture' occurred near the insertion and reflected the degenerative changes of the enthesis.

目的：上张肌腱的囊侧（B-S）和联合侧（J-S）层可能在不同的机制中被撕裂。在这项研究中，我们试图阐明两层之间的组织学特征和生物力学特性的差异，参考肩袖撕裂的病因。材料和方法：50个肩ver肌肌腱从新鲜尸体的双边肩部切除（28-79年）。在冠状动脉中进行了10个上张肌腱的组织学切片，并在临界部分的肌肉齿连接处，近端和远端且插入的肌肉连接处进行了4个横平。在生物力学研究中，将40个上张肌腱水平划分为厚度相等的B-S和J-S层。每一层对敌人进行了准静脉拉伸测试，测量了肌肉侧面，肌腱和插入部分的伸长率。分辨率：上张上张的肌腱纤维在B-S层中的肌腱纤维比J-S层厚。 J-S层中的纤维朝向插入。在拉伸试验中，对B-S层的破坏应力大于J-S层的应力，而弹性模量在前者中较低。肌腱部分在B-S层中具有最大的伸长率，而J-S层均匀伸长。在B-S层的肌腱的近端和J-S层的插入附近发生了“严重破裂”。 “隐藏破裂”发生在插入附近，并反映了埃文的退化变化。