Three-dimensional finite element analysis of the effect of the rebase thickness on the stress distribution of restored teeth with vital pulp
YAN Ying
SUN Jia-tao
LI Ming-zhu
PENG Wei
Abstract：AIM:To analyze the effect of different thickness of the rebase material on the stress distribution of the teeth with vital pulp after filling.METHODS:The normal maxillary first premolars were selected and rebased by self-curing glass-ionomer with the thickness of 0.5 mm,1.0 mm and 1.5 mm respectively.The physiological role of occlusal force and the stress distribution of the tooth tissue and rebase were analyzed by workbench 15.0 finite element analysis software.RESULTS:When the bottom thickness was 0.5 mm,the maximum/minimum principal stress of the tooth tissue,the filling body and the bottom layer was the smallest,while the bottom thickness increased from 1.0 mm to 1.5 mm,the stress value of the teeth,the filling body and the bottom layer increased significantly.The minimum principal stress of the bottom layer in the 1.5 mm group was higher than that of the dentin compressive strength(11.4 MPa);the maximum principal stress value of the bottom layer showed little difference with the tensile strength of the filling body.CONCLUSION:From the point of view of the protection of the dental tissue,the appropriate rebase thickness should be 0.5 ～ 1.0 mm.
Keywords：maxillary first premolarclass Ⅱ cavitybottom thicknessfinite element analysis
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 574-577 )