LI Su-ling, et al. The three-dimension finite element analysis of stress in posterior tooth residual root restored post-core crown of different loading direction[J]. Journal of Chongqing Medical University, 2009,34(3):342-345.
LI Su-ling, et al. The three-dimension finite element analysis of stress in posterior tooth residual root restored post-core crown of different loading direction[J]. Journal of Chongqing Medical University, 2009,34(3):342-345.DOI:
Objective:To analyze the stress magnitude and distribution of remaining dentin in posterior tooth residual root restored with post-core crown using three-dimension finite element method. And then to discuss the rational core design when repairing posterior tooth root post-core crown. Methods:The models of residual root of maxillary first molar restored with post-core crown were created by CT scanning
Mimics software and Abaqus software. Different number
length and material of post were used in the modeling. The post was cemented with zinc-phosphate cement. A load of 240 N was applied to the occlusal surface in four directions and tensile
shear
and von Mises stresses were calculated. Results:The maximum stress on remaining dentin increased markedly with increasing of loading angle. Conclusion:The loading angle have influence on magnitude and distribution of stress. The influence from loading angle is most apparent.