The Effect of Mandible Viscoelasticity on Dynamic Stress Distribution in Osseous Tissue Adjacent to Dental Implant Publisher



Azadikhah N¹ ; Shahriari S¹ ; Parandakh A² ; Khojasteh A³ ; Khani MM^{4, 5} Show Affiliations
Source: Biomedical Engineering - Applications# Basis and Communications Published:2017

Abstract

Mandible consists considerable amount of water together with solid phase of hydroxyapatite and collagen fibrous. Such composition causes the bone tissue to exhibit time-dependent viscoelastic behavior in response to external dynamic loads for instance mastication. In this study, we aimed to evaluate the effect of mandible viscoelasticity on dynamic stress distribution in osseous tissue adjacent to dental implant with the aid of finite element analysis method. The von-Mises stress profile within the surrounding bone tissue of Titanium dental implant was investigated in two different elastic and viscoelastic models of mandible. The two models had identical boundary conditions and geometrical features but different mechanical properties. There were no obvious changes in the location of vulnerable area in both models. But in comparison with the elastic model, a considerable drop in peak stress values accompanied with a smoother stress contours was observed in the viscoelastic model. It can be concluded that the viscoelasticity of mandible plays a vital role in the evaluation of subsequent response of implanted mandible to external cyclic loads and thus in detecting the long-Term success of dental implantation. Significant reduction of stress exerted on mandible bone, particularly in the area adjacent to the location of applied force, may result in a longer fatigue life as a main index of long-Term success of dental implantation. © 2017 National Taiwan University.