Department of Oral Cell Biology and Functional Anatomy, Academic Centre for Dentistry Amsterdam Research Institute Move, University of Amsterdam and VU University, Gustav Mahlerlaan 3004, 1081 LA Amsterdam, The Netherlands.
Osteoarthritis Cartilage. 2012 Jan;20(1):43-8. doi: 10.1016/j.joca.2011.10.009. Epub 2011 Oct 24.
Increased friction due to impaired lubrication in the jaw joint has been considered as one of the possible causes for internal joint disorders. A very common internal disorder in the jaw joint is an anteriorly dislocated articular disc. This is generally considered to contribute to the onset of arthritic injuries. Increase of friction as caused by impairment of lubrication is suspected to be a possible cause for such a disorder.
The influence of friction was addressed by analysis of its effects on tensions and deformations of the cartilaginous structures in the jaw joint using computational biomechanical analysis. Jaw open-close movements were simulated while in one or two compartments of the right joint friction was applied in the articular contact. The left joint was treated as the healthy control.
The simulations predicted that friction primarily causes increased shear stress in the articular cartilage layers, but hardly in the articular disc.
This suggests that impaired lubrication may facilitate deterioration of the cartilage-subchondral bone unit of the articular surfaces. The results further suggest that increased friction is not a plausible cause for turning a normally functioning articular disc into an anteriorly dislocated one.
由于颌关节润滑不良导致的摩擦力增加，被认为是颌关节内部紊乱的一个可能原因。颌关节中一种非常常见的内部紊乱是关节盘前移位。这通常被认为是导致关节炎损伤的原因之一。润滑不良导致的摩擦力增加，被怀疑是这种紊乱的一个可能原因。
使用计算生物力学分析，通过分析摩擦对颌关节软骨结构张力和变形的影响来研究摩擦的影响。模拟颌的开闭运动，在右侧关节的一个或两个关节腔内施加关节接触处的摩擦力，左侧关节作为健康对照。
模拟预测摩擦主要导致关节软骨层的剪切应力增加，但对关节盘几乎没有影响。
这表明润滑不良可能会加速关节表面软骨-软骨下骨单元的恶化。结果还表明，摩擦力增加不是将正常功能的关节盘变成前移位的合理原因。
