Analysis of stress concentration in bone–implant interface using different shapes of the implant: Porous Ti and ultra-fine grained Ti

Abstract

Background/aimsThe effect of materials that are used to make an implant is an essential factor and should be considered to predict the damage of the bone and implant. Different materials have different Young's modulus and they produce different stress concentration in bone. MethodsThree-dimensional finite element models of different implants were analyzed using Ansys workbench 12. In this study we compared porous titanium and ultra-fine grained titanium covered by Hydroxyapatite. We used 180 μm thickness of Hydroxyapatite for the ultra-fine grained titanium according to the former studies. Different shapes of the implant have been modeled and all of them showed that the ultra-fine grained titanium has lower stress concentration near bone. Results and conclusionResults show that ultra-fine grained titanium has better distribution of the interface stress, so it shows better compatibility to the bone. The effect of Hydroxyapatite as an important factor is considered. Non-linear analysis was used to evaluate the results that show that models I and III are the best models when ultra-fine grained-Ti is used.