摘要
该文通过非线性有限元法研究在口腔正畸临床状态下的牙周组织力学响应。通过逆向工程方法将CT扫描获得图像建立起牙颌的三维有限元模型,使用牙周膜非线性本构模型,获得了在相邻牙齿作用下的牙颌组织的力学响应。分析了不同情况下牙齿相互作用力对正畸过程中牙周组织响应的影响,研究对比了牙颌骨的变形对牙齿位移的影响,最后使用数字散斑实验对数值模拟的结果进行了分析和验证。结果表明:牙齿之间的相互作用使得实际作用到牙周组织上的力有较大的变化;分析牙周组织的应力响应应该考虑牙齿之间的相互作用力。
The mechanical response of periodontal ligament in a clinical condition was analyzed in this paper with a nonlinear finite element method. A three-dimensional finite element model was built through the reverse engineering method with the images gained from CT scanning, and the mechanical response of dental tissue in a clinical condition was obtained with a nonlinear constitutive model of periodontal ligament. The influence of the interaction force between teeth on the mechanical response of periodontal ligament was analyzed, also did the influence of deformation of alveolar bone under a load on tooth displacements. A digital speckle experiment was conducted at last to testify the simulation result. The result shows that： the real force acted on the dental tissue is greatly influenced by the interaction force between teeth, thusly it is important indeed to use the force which is load onto the dental tissue to evaluate the dental response.
出处
《工程力学》
EI
CSCD
北大核心
2012年第9期363-368,共6页
Engineering Mechanics
关键词
口腔正畸
牙周组织
力学响应
临床状态
有限元
orthodontics
dental tissue
mechanical response
clinical condition
finite element method
