Influence of arch curvature and all-ceramic materials on fatigue life of fixed bridges:  a finite element analysis

doi:10.3969/j.issn.2095-4344.0778

Abstract

Abstract:

BACKGROUND: The cyclic fatigue finite element method is more useful to study the fatigue life of the prosthesis in accordance with the actual situation of the oral cavity.

OBJECTIVE: To study the all-ceramic fixed bridge fatigue life with different arch curvatures and materials.

METHODS: According to the arch curvature, four sets of models (group I, 0°; group II, 30°; group III, 60°; group IV, 90°) were set up on the basis of a digital model of all-ceramic fixed bridge. Fatigue life of each model was analyzed with different materials (In-Ceram Zirconia, Zenotec, LAVA).

RESULTS AND CONCLUSION: The stress was mostly concentrated at the join of the all-ceramic fixed bridge. It was also the most part of the stress extremum, the shortest part of fatigue life and the most easily damaged part of the material. With the increase of arch curvature, the fatigue life of Group In-Ceram Zirconia dropped from 4.6 to 1.7 years, while both Group Zenotec and Group LAVA had the fatigue life of 19.6 years. The part of minimum life was the join of the fixed bridge. These findings indicate that the expected fatigue life of In-Ceram Zirconia all-ceramic fixed bridge restoration is relatively short, which may be an inappropriate repair material in anterior and posterior positions of canine teeth. All-ceramic materials, Zenotec and Lava, can meet the clinical life expectancy under different curvatures.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: Dental Arch, Dental Porcelain, Fatigue, Finite Element Analysis, Tissue Engineering

CLC Number:

R318

Lu Xiao-feng, Ling Li, Dong Ning. Influence of arch curvature and all-ceramic materials on fatigue life of fixed bridges: a finite element analysis[J]. Chinese Journal of Tissue Engineering Research, 2018, 22(14): 2174-2178.

Figures/Tables 5

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