Research of Stress and Deformation Distributions in Central Incisors Restored with Different Glass Fiber Post Types
Three-dimensional digital oral treatment technology based on anatomical features of jaw bone and teeth was applied for modeling. Three dimensional finite element models for the restorative systems with straight glass fiber post, screw glass fiber post and one-piece glass fiber post-and-core were established. Stress and deformation under external bite force were calculated and compared among different post types. Comparing the maximum von Mises equivalent stress in the whole restorative system for the straight post, the screw post and the one-piece glass fiber post-and-core finds that the one-piece glass fiber post-and-core is effective to lower the maximum stress and obtain uniform stress distribution of the teeth. Even in each part of the restorative system like post, crown and root, the maximum stress in the case of one-piece glass fiber post-and-core is still lowest. Using one-piece glass fiber post-and-core, the overall deformation of the restorative system is decreased greatly.
Pengcheng Wang, Liqun Ai, Yungang Li, Xiaoming Sang and Jinglong Bu
Z. X. Huang et al., "Research of Stress and Deformation Distributions in Central Incisors Restored with Different Glass Fiber Post Types", Advanced Materials Research, Vols. 295-297, pp. 2400-2405, 2011