Biomechanical calculation of human TM joint loading with jaw opening
Biomechanical calculation of human TM joint loading with jaw opening
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DOI：
10.1046/j.1365-2842.2000.00582.x
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发表时间：
2000-11-01
影响因子：
2.9
通讯作者：
Clark, GT
中科院分区：
文献类型：
--
作者：
Kuboki, T;Takenami, Y;Clark, GT
通过对口颌系统进行三维静态数学计算，预测不同开颌水平下颞下颌关节（TMJ）的总负荷。该模型假设作用在下颌骨上的肌肉力可以由收缩分量（CC）和弹性分量（EC）的组合来模拟，并且下颌骨体内存在静态平衡。该模型还施加了约束，即任何产生的关节反作用力都将作用于髁突的中心。该模型的结果表明，在所有条件下的开放和选择的所有值的弹性模量，TMJ髁突和关节隆起之间的力是压缩的性质。当钳口从10 mm打开到40 mm时，压缩力大小从2.7 N递增到27.6 N。本研究的总体数据表明，TMJ组织在打开位置达到40 mm时受到低水平的压缩。最后，模拟牙关紧闭的条件（钳口闭合激活增加，打开），20 mm开口处的关节反作用力从7.7 N增加到64.9 N，仅激活20%的剂量器。
A three-dimensional, static mathematical calculation of the stomatognathic system was done to predict total temporomandibular joint (TMJ) loading at different levels of jaw opening. The model assumed that muscle forces acting on the mandible could be simulated by a combination of contractile components (CCs) and elastic components (ECs) and that static equilibrium existed within the body of the mandible. The model also imposed the constraint that any generated joint reaction force would act on the centre of the condyle. The results of the model demonstrated that under all conditions of opening and for all values of the elastic modulus selected, the forces between the TMJ condyle and the articular eminence were compressive in nature. The compressive force magnitude increased from 2 .7 to 27 .6 N incrementally as the jaw opened from 10 to 40 mm. Overall data in this study indicated that the TMJ tissues undergo low levels of compression at open positions up to 40mm. Finally, the condition of trismus (increased jaw closing activation with opening) was simulated, the Joint reaction force at 20 mm opening increased from 7 .7 to 64 .9 N with only a 20% activation of the dosers.