摘要
目的探讨高嵌体修复缺损牙体的应力分布规律。方法建立六种不同程度缺损牙体的高嵌体修复模型,利用三维有限元法分析模型在两种载荷下的应力情况。结果模型整体Von-Mises应力峰值出现于颊侧牙体颈部;缺损较大的模型表现出相对较低的应力水平。水平分量载荷产生的最大主应力值大于斜向载荷产生的最大主应力。结论高嵌体修复产生的牙体不良应力较小,有利于保护牙体组织,对于修复大面积牙体缺损的病例很有意义。
Objective To investigate stress distribution of the tooth restored by Onlay. Methods To establish 6 types of models that varied dental defects restored by Onlay,and investigate the stress of the models under two kinds of load with three-dimension finite element analysis software. Results Von-misers Stress peak point occurred at buccal side of tooth;Relatively low stress occurred in the large dental defect model.The maximum tensile stress value emerged by horizontal load was more than that emerged by oblique load. Conclusions Rotarod test is a more objective ethologyical method than pole test for MPTP model mice of Parkinson's diseaseOnlay restoration is helpful in protection of tooth construction,especially large dental defects,for its small infect stress.
出处
《齐齐哈尔医学院学报》
2009年第17期2101-2103,共3页
Journal of Qiqihar Medical University
关键词
有限元
高嵌体
Finite Element Method Onlay