Nonlinear finite element analysis of the vibration characteristics of the maxillary central incisor related to periodontal attachment
Nonlinear finite element analysis of the vibration characteristics of the maxillary central incisor related to periodontal attachment
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DOI：
10.1007/s11517-009-0542-0
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发表时间：
2009-10
影响因子：
3.2
通讯作者：
H. Xin;Yulong Li;Lingcheng Zhao;W. Guo
中科院分区：
文献类型：
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作者：
H. Xin;Yulong Li;Lingcheng Zhao;W. Guo
根据人牙周韧带（PDL）的非线性行为，采用有限元法对上颌中切牙的振动特性进行了研究。我们还研究了牙槽骨丢失的影响，以获得牙周系统中牙齿的振动特性与牙周附着水平之间的关系，以评估牙周组织的状况。采用CT图像重建技术建立牙体三维有限元模型，并对PDL附着的牙根表面施加弹性面基约束。采用有限元法进行模态分析。采用分段线性化的方法对PDL的非线性行为进行了赋值和逼近。结果表明，上颌中切牙在牙周系统中的振动可以用几个模态频率和模态来描述。前四种模式占主导地位，它们随PDL的变形或施加在牙齿上的力而变化。上颌中切牙的振动频率随牙槽骨的丧失而降低，但降低的比例与人牙槽骨的非线性行为无显著相关。上颌中切牙的振动频率可以用来描述在生理短期负荷下牙槽骨的损失和牙周附着水平。
The vibration characteristics of a maxillary central incisor were investigated by using the finite element method (FEM) according to nonlinear behavior of the human periodontal ligament (PDL). The effect of alveolar bone loss was also studied to obtain the relationship between the vibration property of the tooth in the periodontal system and the level of periodontal attachment for assessing the condition of periodontium. Three-dimensional (3D) finite element model of the tooth was constructed using CT image-reconstruction, and the elastic face foundation constraint was applied to the surface of the tooth root where the PDL was attached to. Modal analysis was performed by using FEM. The nonlinear behavior of the PDL was assigned and approached by the piecewise linearized method. The results indicated that the vibration of the maxillary central incisor in the periodontal system could be described by several modal frequencies and modes. The first four modes were dominant, which varied with the deformation of the PDL or the force applied on the tooth. The vibration frequency of the maxillary central incisor decreased with the losing of the alveolar bone, but the ratio of decrease had no significant correlation with the nonlinear behavior of the human PDL. The vibration frequency of the maxillary central incisor can be used to describe the loss of the alveolar bone and the level of periodontal attachment, under physiological short-term loading.