Related Experiment Video
Updated: Jun 22, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
[Three-dimensional finite element analysis of the change of cracks in the cracked first mandibular molar under
Tie-Zhou Hou1, Feng-Yan Zhu, Hong Tao
1Dept. of Oral Medicine, Stomatological Hospital of Xi'an Jiaotong University, Xi'an 710004, China.
Objective:
To study the change of the cracks and the influence on overall displacement of the cracked first mandibular molar under different loadings.
Methods:
Three-dimensional finite element models of first mandibular molar with cracks of different depth and length and a control model with no crack were created firstly. Then six loading conditions were applied to the models simulating the real mastication. The changes of the cracks and displacement of the teeth under the six loadings conditions were obtained by finite element method.
Results:
The length and depth of the cracks increased, the cracks of the occlusal surface become wider, and the crack was the widest under the fourth loading condition. Moreover, the edge of the cracks was irregular. The adjacent nodes were not in the same plane. The crack of the distal surface was the widest under the sixth loading condition. Compared to the teeth without cracks, the overall displacement of the teeth with cracks increased, but the increment was limited.
Conclusion:
The change of the cracks is closely related to the initial crack forms and loading conditions.
Related Concept Videos
Three-Dimensional Analysis of Strain
Microcracking in Concrete
Relation between Poisson's ratio, Modulus of Elasticity and Modulus of Rigidity
Behavior of Concrete Under Compressive Load
As the concrete specimen fractures under...
Transformation of Plane Stress
Stress: General Loading Conditions
The shearing force, possessing potential directionality within the plane of the section, is simplified into two component forces running parallel to the x and y axes.

