上颌中切牙修复体力学行为的有限元仿真分析

对上颌中切牙核桩冠修复体进行三维有限元仿真分析,分别就不存在牙槽骨吸收和存在牙槽骨吸收的情况下,以牙冠、牙核所用材料已经确定为前提,探讨了桩的弹性模量与剩余牙根内部最大主应力峰值之间的关系.结果表明,在不存在牙槽骨吸收的情况下,使用较高弹性模量材料制成的核和桩,都能够降低牙根内部的最大主应力峰值;在存在牙槽骨吸收的情况下,牙根内部的最大主应力峰值大于不存在牙槽骨吸收,这时牙桩所用材料的力学性能对剩余牙根的影响更为显著.

FE simulation of the mechanical performance of the maxillary central incisor system

Incisals restored with post-core-full crown.A three dimensional(compu-)ter simulation of finite element analysis is given.In the prerequisite,materials of both(den-)tal crown and core have been prepared,the relationship between elastic modulus of the dental post and the peak value of maximum principal stress of the remained inside of the dental root are discussed in both conditions of without and with dentoalveolar absorptions.The analytic result shows that the peak value of maximum principal stress of the inside of the dental root will be reduced if the core and post are produced by materials of high elastic modulus without dentoalveolar absorptions.In addition,peak value of maximum principal stress of the inside of the dental root is larger in the condition of with dentoalveolar absorptions,where the mechanical performances of the dental post's materials affect the remained roots more clearly,than without dentoalveolar absorptions.