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

Results 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.