Abstract
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.
Highlights
Dental implants are commonly used to replace missing or damaged teeth in fully and partly edentulous patients [Papaspyridakos, Mokti, Chen et al (2014); Pjetursson, Thoma, Jung et al (2012)]
The purpose of the current study is to analyze the effect of distinct thread pitch and distinct bone qualities for Zirconia dental implants on stress distribution in cortical, cancellous bone using the three dimensional finite element analysis, which is a numerical tool widely used in dentistry to analyze the stresses and strains in cortical, cancellous bone and because it helps researchers to predict the stresses and strains in other regions of the implant-bone model structure
Apart from the limitations considered, the outcome of this study gives some important findings on stress distribution in the bony region for different pitch values
Summary
Dental implants are commonly used to replace missing or damaged teeth in fully and partly edentulous patients [Papaspyridakos, Mokti, Chen et al (2014); Pjetursson, Thoma, Jung et al (2012)]. In the case of osseointegrated dental implants, the static and dynamic loads are transferred directly to the nearby bone in patients treated with an implant. These kinds of loads could induce failure of the implant, a rupture in the bone and implant interface, slackening of the implant-abutment system and unwanted bone tissue resorption [Eskitascioglu, Usumez, Sevimay et al (2004)]. It is important to consider the interplay between the bone and the implant, and their connections to the nearby components for the success of osseointegration, and studying the biomechanical comportment turns out to be an CMES. It is important to understand the behavior of the bone around the implants to study the biomechanics of the dental implant
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