Analysis of stress generated in the enamel of an upper first premolar: a finite element study

Abstract

This study investigated the distribution and magnitude of stress generated in the enamel of an upper first premolar, after applying normal and excessive occlusal loads in a vertical and horizontal direction, using Finite Element Analysis (FEA). Methodology: A 3D virtual model of an upper first premolar was analyzed. The CT images of the tooth were converted into 3D data using the program MIMICS and Finite Element Analysis (FEA) was used for the stress study. To better understand the distribution of stress generated by occlusal loading, the situation of the enamel in various 3D virtual models was presented. 14 scenarios for the occlusal loading of the virtual models of the upper first premolar were obtained and the areas with the highest concentration of stress were emphasized. Results: In the model with the tooth intact, stress values were higher than the admissible ones in the simulation of the excessive vertical loading, normal horizontal loading and excessive horizontal loading. Stress was found in the buccal cusp area and in the cervical area, mainly on the buccal side of the tooth. In the models with horizontal occlusal tooth wear, stress values were higher than the admissible ones in the simulation of the excessive vertical loading. Stress was found in the cervical area. In the models with oblique occlusal tooth wear, stress values were higher than the admissible ones in the simulation of the normal and excessive horizontal loading. Stress was found mainly in cervical area, on the buccal side of the tooth. Conclusions: The most harmful loads were the heavy vertical ones and the horizontal ones, no matter the magnitude.

Modifications of the Dental Hard Tissues in the Cervical Area of Occlusally Overloaded Teeth Identified Using Optical Coherence Tomography

“…The effects of occlusal overloads highlighted in the form of dental wear (attrition and NCCL) [23,24], in the form of dental fissures and in the form of disorders of trophicity of the dental pulp [25,26] are also discussed in other publications [27].…”

“…There are other studies in literature that focused on the association between occlusal wear and the presence of lesions in the cervical area of the respective teeth. Most studies are performed by Finite Element Analysis (FEA) and show that the less the occlusal morphology is affected by wear, the higher the stress concentration in the cervical areas of the teeth, especially on the buccal surfaces [23,24].…”

The Stresses and Deformations in the Abfraction Lesions of the Lower Premolars Studied by the Finite Element Analyses: Case Report and Review of Literature

“…A brief description of the included articles in this study is presented in Table 6, and the results and conclusions related to those articles are shown in Table 7 [24][25][26][27][28][29][30][31][32][33][34]. Table 6.…”

“…Table 6. Brief description of included articles in the study [24][25][26][27][28][29][30][31][32][33][34]. The intact extracted lower premolar scan images were studied with two-dimensional FEM.…”

“…The deformation of the tooth below the paraxial load was approximately 10 times greater than below the axial load. 10 Stănuşi, A. et al [33] 2020…”