Comparative Study on Three-dimensional Elastic Stress Analysis between Caries and Healthy Teeth

doi:10.13701/j.cnki.kqyxyj.2022.12.011

Abstract

Abstract: Objective: To analyze the tooth deformation and stress distribution of right mandibular first molar under vertical and lateral forces, and to study the difference of the maximum stress distribution between caries and healthy teeth. Methods: An extracted right mandibular first molar was scanned by CBCT to obtain slice images. The data were imported into Matlab^© software to construct the real tooth calculation area. The meshless collocation method was used to solve the three-dimensional tooth force model. Based on the newly established model, the deformation and stress distribution of three-dimensional elastic teeth were analyzed in detail. The difference between caries and healthy teeth was studied from the perspective of maximum stress distribution by setting holes in the teeth. Results: The maximum stress is located in the pit, ridge, or neck of the occlusal surface of healthy molar. When the occlusal surface born the load vertically, the maximum stress of the tooth with hollow sphere was located on the surface of the hollow sphere. However, under the same load, the maximum stress of teeth without empty spheres was located in the tooth neck. Conclusion: The meshless collocation method is effective. It is believed that the caries site is prone to tooth fracture.

Key words: meshless collocation method, elasticity, CBCT scanning reconstruction, dental caries

JIANG Mei, LU Kanghua, CHEN Ruyue, ZHENG Hui, SHI Yan. Comparative Study on Three-dimensional Elastic Stress Analysis between Caries and Healthy Teeth[J]. Journal of Oral Science Research, 2022, 38(12): 1155-1160.

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