生理载荷作用下上颌中切牙牙周膜应力分布的三维有限元研究

以上颌中切牙为解剖学基础建立了三维有限元模型。以生理载荷分别作用于上颌中切牙、天然牙及桩冠修复体，通过计算得到了生理载荷作用下牙周膜的应力分布并与上颌中切牙种植体模式（骨性附着，无牙周膜）在生理载荷作用下的应力分布以及牙周膜对应力的缓冲作用进行了比较性研究。

Three dimensional Finite Element Study on Periodontal Membrane of Central Maxillary Incisor under Physiological Load

This paper presents the development of a three dimensional finite element model of central maxillary incisor. Stress distribution of the periodontal membrane was obtained by calculation under physiological load exerted to the natural tooth and tooth restored with post respectively. And it was compared with the stress distribution of the implate (contact with bone and without periodontal membrane). The result indicated that, under physiological load, when the natural tooth was compared with tooth restored with post, there were no apparent diferences in stress distribution of periodontal membrane and in stress values on inner surface and outer surface of periodontal membrane. Itsuggests that periodontal membrane has apparent cushioning action against stress.