Effect of Implant Length on Bone Stresses Using 3D Finite Element Analysis

Abstract

Introduction: Occlusion and biomechanics are very important considerations , which affect implant- supported prosthetics design . Finite Elements Analysis is a valuable method to analyze stresses around implants. The purpose of this research is to study the effect of implant length on bone stresses around implants, and and to comparing their values with the maximum bone-accepted values .

Materials & Methods: geometric data for lower jaw, dental implant, abutment, and the screw wrer inserted to a computer. Cosmos software was used in order to conduct finite element analysis. Then we applied a static force, which was 80 Kg vertically. 

Results: The results of this research are as follows:

1. The stresses were concentrated in the crest of alveolar bone, and they were decreased along the implant length.
2. The highest stress value was in the node 3785 (74.974, -15.791 ، -381.26), which was 418.31 kg/cm².

Conclusion: We studied stresses in the bone around implants by finite element analysis. we applied a static force 80 Kg vertically which represented the avarege bite force value in human . The results showed that stresses were concentrated around the implants in the crest of alveolar bone. And The results showed that most stress value was kg/cm² 418.31, which was less than the value accepted kg/cm² 750-1130 . Therefore, we can use dental implants safely if we apply the protocols correctly