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[Biochemical analysis of stress distribution of dental implants with different body shapes after maxillary sinus
Shu-Yu Zuo1, Xuan Wang, Hai-Wei Wu
1Department of Stomatology, Shandong Provincial Hospital affiliated to Shandong First Medical University. Jinan 250012, Shandong Province, China.
Purpose:
To compare the stress distribution of dental implants with different body shapes after maxillary sinus augmentation.
Mrthods:
Three different implant models varying in implant shape were investigated in D3-type maxilla. All materials were assumed to be linear elastic, homogenous and isotropic. An oblique force of 150 N was applied to the implant. Maximal equivalent von-Mises of supporting bone around implants were measured. All of the models were measured by Ansys Workbench 14.5. Statistical analysis was performed using SPSS 17.0 software package.
Results:
Highest stress of supporting bone emerged on the crestal cortical site around the implant neck. There was no significant difference in the maximum EQV of supporting cortical bone between different groups; the maximum EQV of supporting trabecular bone in the tapered implant group was much higher than other groups; application of grafts reduced the maximum EQV of both cortical and trabecular bone in all groups.
Conclusions:
Tampered implant can induce elevated stress distribution of the upper trabecular bone, which may promote marginal bone loss. Application of grafts after maxillary sinus augmentation could favors in reducing the stress loading of dental implants.
