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Mild and uniform deformation of maxillary sinus mucosa is an important factor that reduces the incidence of


mucosal perforation during maxillary sinus elevation by using bone condensing technology.


To compare the effects of two diameter implants on the deformation of maxillary sinus mucosa.


Three-dimensional finite element models of the maxillary sinus mucosa (thickness 0.3 mm) with two diameter implants (4.1 mm, 4.8 mm) were established in the special unit of ANSYS software. Maxillary sinus elevation operation was simulated. Von Mises stress values of mucosa surface with different lifting height was calculated according to the finite deformation theory.


The maximum stresses of all models existed in the center of the mucosa and the minimum stresses existed in the edge of the mucosa. There was no significant difference in the stress to the center of the mucosa between the two diameter implants (P > 0.05), but the stress in the edge of mucosa of the larger diameter implant (4.8 mm) was significantly less than that of the stress in the edge of the small diameter implant (4.1 mm). The larger diameter implant (4.8 mm) has less stress for augmentation of the maxillary sinus floor in the case of allowed width.


Liu XF, Hu LL, Song GB, Hou YR, Liu DL, Zhang JC. Effect of two different diameter implants on deformation of maxillary sinus mucosa: A three-dimensional finite element analysis.Zhongguo Zuzhi Gongcheng Yanjiu yu Linchuang Kangfu. 2011;15(52): 9742-9745. [http://www.crter.cn]

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