Synovial fluid dynamics with small disc perforation in temporomandibular joint
Synovial fluid dynamics with small disc perforation in temporomandibular joint
复制标题
颞下颌关节小椎间盘穿孔的滑液动力学
DOI：
10.1111/j.1365-2842.2012.02307.x
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发表时间：
2012-10-01
影响因子：
2.9
通讯作者：
Zhu, P.
中科院分区：
文献类型：
--
作者：
Xu, Y.;Zhan, J.;Zhu, P.
关节盘在关节运动中起着重要的应力吸收作用，导致颞下颌关节（TMJ）的应力减少和重新分布。滑液在颞下颌关节的流动可以遵循一个规则的模式在下颌运动。我们假设当TMJ椎间盘穿孔时，规则模式被破坏。通过计算机断层关节摄影，我们研究了在0 ~ 3cm位置的下颌开闭过程中出现小椎间盘穿孔的患者的颞下颌关节上腔室。通过有限元流体动力学建模，分析了运动过程中流体的流动规律和压力分布。结果表明：上腔室内流体流动总体呈逆时针循环，但局部存在涡状流动，鄂口开口可达2 cm；然而，当颌骨开合达到3cm时，与穿孔相关的异常流场和流体压力变化可能增加穿孔扩张或破裂的风险，不利于穿孔椎间盘的自我修复。
The articular disc plays an important role as a stress absorber in joint movement, resulting in stress reduction and redistribution in the temporomandibular joint (TMJ). The flow of synovial fluid in the TMJ may follow a regular pattern during movement of the jaw. We hypothesised that the regular pattern is disrupted when the TMJ disc is perforated. By computed tomography arthrography, we studied the upper TMJ compartment in patients with small disc perforation during jaw openingclosing at positions from 0 to 3 cm. Finite element fluid dynamic modelling was accomplished to analyse the pattern of fluid flow and pressure distribution during the movements. The results showed that the fluid flow in the upper compartment generally formed an anticlockwise circulation but with local vortexes with the jaw opening up to 2 cm. However, when the jaw openingclosing reached 3 cm, an abnormal flow field and the fluid pressure change associated with the perforation may increase the risk of perforation expansion or rupture and is unfavourable for self-repair of the perforated disc.