Finite element analysis on the deformation of maxillary sinus mucosa after closed maxillary sinus augmentation

doi:10.3969/j.issn.2095-4344.2013.50.010

Abstract

Abstract:

BACKGROUND: How to avoid iatrogenic maxillary sinus mucosal perforation after closed maxillary sinus augmentation.
OBJECTIVE: To compare the influence of maxillary sinus mucosa at different thicknesses on the mucosal perforation in closed maxillary sinus augmentation operation by using finite element analysis.
METHODS: Three finite element models of maxillary sinus mucosa at different thicknesses of 0.3 mm, 0.5 mm, 0.8 mm respectively and implant with 4.2 mm diameter were established in the SHELL63 units. ANSYS finite
element analysis software was used to evaluate maxillary sinus mucosal deformation by the simulated closed maxillary sinus augmentation surgery. Differences of Von Mises maximum stress values of mucosa surface were calculated according to the non-linear large-deformation theory.
RESULTS AND CONCLUSION: When maxillary sinus mucosa height was increased from 1 mm to 5 mm, the large deformation was observed in the center of mucosa center. The maximum stress curve slope was shifted mild between 1-4 mm deformation, while shifted abruptly after 4 mm. There was no difference in the value of Von Mises maximum stress values between three maxillary sinus mucosa at 0.3 mm, 0.5 mm, 0.8 mm thickness, when the lift height was increased from 1 mm to 5 mm (P > 0.05). Maxillary sinus mucosa are faced with a higher risk of mucosal perforation and elastic elongation when maxillary sinus height is increased more than 4 mm. Maxillary sinus mucosa at 0.3-0.8 mm thickness are faced the similar risk of mucosal perforation in closed maxillary sinus augmentation operation within 5 mm. While more considerations should be paid on patients with less than 0.3 mm maxillary sinus mucosa thickness.

中国组织工程研究杂志出版内容重点：组织构建；骨细胞；软骨细胞；细胞培养；成纤维细胞；血管内皮细胞；骨质疏松；组织工程

全文链接：

Key words: maxillary sinus, augmentation, finite element analysis, dental implants, stress, physics

CLC Number:

R318

Liu Xiao-fang, Hu Ling-ling, Song Guang-bao, Shao Long-quan, Liu Da-lie, Zhang Jin-cai. Finite element analysis on the deformation of maxillary sinus mucosa after closed maxillary sinus augmentation[J]. Chinese Journal of Tissue Engineering Research, doi: 10.3969/j.issn.2095-4344.2013.50.010.

Figures/Tables 5

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