The bursal and articular sides of the supraspinatus tendon have a different compressive stiffness
The bursal and articular sides of the supraspinatus tendon have a different compressive stiffness
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DOI：
10.1016/s0268-0033(99)00086-8
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发表时间：
2000-05-01
影响因子：
1.8
通讯作者：
An, KN
中科院分区：
文献类型：
--
作者：
Lee, SB;Nakajima, T;An, KN
客观的。测量冈上肌腱的抗压刚度，并确定肌腱滑囊侧和关节侧是否存在区域差异。设计。对冈上肌腱的滑囊侧和关节侧进行压痕测试，重点关注经常发生肩袖撕裂的“关键区域”。背景。当冈上肌腱缠绕肱骨头或处于撞击状态时，腱表面会受到压缩力。因此，压缩应力最近被认为是与袖带撕裂相关的重要因素之一。机械性能对于应力分布的分析建模至关重要。方法。在冈上肌腱滑囊和关节面的 15 个位置进行压痕试验。采用指数关系的数学模型来描述测量的力-变形关系并计算冈上肌腱的压缩刚度。结果。肌腱滑囊侧和关节侧的初始刚度显着不同。在法氏囊侧，前三分之一的初始刚度平均显着高于其他三分之一。在关节侧，距大结节近端 10 mm 位置的初始刚度平均显着高于其余位置。结论。发现冈上肌腱的压缩刚度在整个结构中是不均匀的。
Objective. To measure the compressive stiffness of the supraspinatus tendon and to determine whether regional difference exists in the bursal and articular side of the tendon.Design. Indentation testing was performed on both the bursal and articular sides of the supraspinatus tendon, focused on the 'critical area', where rotator cuff tears often occur.Background. When the supraspinatus tendon wraps around the humeral head or is under impingement condition, compressive force on the tendon surface is expected. Therefore, compressive stress has been recently considered to be one of the important factors associated with the cuff tear. The mechanical properties would be essential for analytic modeling of stress distribution.Methods. Indentation tests were performed at 15 locations on the bursal and articular surfaces of the supraspinatus tendon. A mathematical model with exponential relationship was used to describe the measured force-deformation relationship and to calculate the compressive stiffness of the supraspinatus tendon.Results. The over-ah initial stiffness on the bursal and articular sides of the tendon was significantly different. On the bursal side, the anterior third had a significantly higher initial stiffness than the other thirds on average. On the articular side, initial stiffness at location 10 mm proximal to the greater tuberosity was significantly higher than the rest on average.Conclusion. The compressive stiffness of the supraspinatus tendon was found to be non-homogenous throughout the structure.