Design of Zirconia Abutments for Dental Implants by the Finite Element Analysis Approach

摘要

The purpose of this study is to use a finite element analysis approach to design a zirconia abutment for the Nobel Biocare NobelProcera NP platform that will withstand chewing forces. Various features of the abutment and abutment screw were changed to make the combination of the abutment and the implant as strong as possible. To evaluate the design, the Mohr-Coulomb and von Mises yield criteria were applied for the zirconia abutment and titanium implant, respectively. According to these criteria, a safety factor in the abutment of approximately 2 was achieved after optimization. The highest stresses in the abutment occurred in the flat face, where the abutment and implant come into contact. The prediction is that failure will occur first in the implant, which will lead to large deformation, and then in the abutment.