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下颌骨与颞下颌关节以及牙齿共同完成咀嚼功能,这些结构在口腔医学中占有重要地位,越来越多的研究指出,颞颌关节紊乱性病变的主要因素是关节受力超出了其适应能力。本文在回顾国内外有关文献的基础上,应用现代计算力学的方法,建立下颌骨及咀嚼肌的三维有限元力学模型,计算了各种咬情况下咀嚼肌及下颌骨的应力分布,得出当力方向发生变化时,关节负荷特征及其解剖的改变,从而获得颞颌关节紊乱的一系列参数值,为颞颌关节紊乱综合症的因素理论提供了可靠的力学依据。
Mandible and temporomandibular joint and the teeth together to complete the chewing function, these structures occupy an important position in stomatology, more and more studies have pointed out that the main factor of the temporomandibular joint disorders is the joint force beyond its ability to adapt. Based on the review of relevant literatures both at home and abroad, this paper established the three-dimensional finite element model of the mandible and masticatory muscle by using the method of modern computational mechanics, and calculated the stress distribution of the masticatory muscles and the mandible under various bite conditions. When the direction of force changes, the joint load characteristics and anatomy changes, so as to obtain a series of parameters of TMJ disorders, which provides reliable mechanics basis for the factor theory of TMJ disorders.