Document Type : Full Research Paper
Authors
1
M.Sc. Student, Department of Mechanical Engineering, Yazd University, Yazd, Iran
2
B.Sc. Student, Department of Mechanical Engineering, Yazd University, Yazd, Iran
3
Assistant Professor, Department of Mechanical Engineering, Yazd University, Yazd, Iran
4
Associate Professor, Department of Mechanical Engineering, Yazd University, Yazd, Iran
5
Associate Professor, Department of Endodontics, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
Abstract
Determining the optimum thickness in different root canal cross-sections is very important in root canal treatment. Reducing the stress in the interface of the tooth wall and the filling material is the interest of many researchers in the field of dentistry. In this article, the effect of the dimensions of oval, circular, hourglass and kidney shaped canals in the anterior and premolar teeth on the stresses created in the restored tooth components was investigated. For this purpose, tooth components were modeled in Solid works software after 3D scanning. Next, the canals with an elliptical, circular, hourglass, and kidney-shaped cross-sections in three different sizes were reconstructed in the corresponding teeth. Then, they were analyzed by the finite element method under the effect of the force caused by chewing inside the Abaqus software. Using this model, the stress in the tooth wall as well as in the filling material is calculated for different dimensions of the canal surface. The simulation results show that the highest stress occurs in the upper part of the tooth. Also, the comparison of the stresses in the tooth wall showed that with the increase in the size of the canal, the amount of stress applied to the tooth wall increased and as a result, the tooth will be damaged and fractured in a shorter period.
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