Three-dimensional finite element analysis of different abutment angles and loads of the maxillary central incisor

doi:10.3969/j.issn.2095-4344.2015.38.024

Abstract

Abstract:

BACKGROUND: To optimize the oral implant design in the abutment angle has an important effect on bone resorption, and meanwhile, the high bite force from patients is also crucial to rebuild bone absorption.
OBJECTIVE: To optimize the model design of the maxillary anterior teeth using Ansys Workbench 13.0 software and to investigate the stress size on the cortical and cancellous bone from different angled abutments and different loads of the central incisor.
METHODS: A three-dimensional finite element model of the V-shaped cylindrical threaded implants in the maxillary bone. Abutment angle was set as 0°, 5°, 10°, 15°, 20°, 25°, 30°, and the load stress was set as 90, 105, 120, 135, 150, 165, 180, 195, 210 N. Occlusion of the central incisor was simulated on the implants, and then, buccolingual mechanical loads were loaded on the center of prostheses to observe the effects of different abutment angles and loads on the Von Mises peak stress of the maxilla and mandible.
RESULTS AND CONCLUSION: Under the influence of a single factor, when the abutment angles acted as variables, the Von Mises peak stress of the cortical and cancellous bone was respectively increased by 60.60%
and 69.30% under labial or palatal loads; when the loading stress acted as variables, the Von Mises peak stress of the cortical and cancellous bone was increased by 68.74% and 69.30% under buccolingual loads. When the loading stress was less than 150 N and the abutment angle was less than 25°, the slop of tangent for the mandible Von Mises stress response curve was -1 to 0. It seems from the mechanical analysis that the stress of cancellous bone is more susceptible to abutment angle and load stress; the optimal abutment of screwed implant should be designed to an angle less than 25° and an bite force less than 150 N.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Key words: Finite Element Analysis, Dental Implants, Dental Stress Analysis

CLC Number:

R318

Chen Xiao-xuan, Liu Guo-qiang, Xu Xin. Three-dimensional finite element analysis of different abutment angles and loads of the maxillary central incisor [J]. Chinese Journal of Tissue Engineering Research, 2015, 19(38): 6200-6204.

Figures/Tables 3

References

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