Influence of Geometric Design Variable and Bone Quality on Stress Distribution for Zirconia Dental Implants-A 3D Finite Element Analysis

摘要

This study aims to investigate the effects of variable thread pitch on stress distribution in bones of different bone qualities under two different loading conditions (Vertical, and Horizontal) for a Zirconia dental implant. For this purpose, a three dimensional finite element model of the mandibular premolar section and three single threaded implants of 0.8 mm, 1.6 mm, 2.4 mm pitch was designed. Finite element analysis software was used to develop the model and three different bone qualities (Type II, Type III, and Type IV) were prepared. A vertical load of 200 N, and a horizontal load of 100 N was applied at the abutment surface. The von-Mises stress criterion was used to analyze the results. The crestal bony-region of the mandibular section was subjected to maximum von-Mises stresses for all bone qualities. The outcome of this study indicates that, horizontal loading had more influence on stress distribution than vertical loading, regardless of the bone qualities and pitch values. Varying the dental implant pitch does not cause any decrease in stress distribution in bone, when the bone density decreased. The study concluded that implants with minimum pitch values induced lesser stress values at the implant-bone interface.