A Three-Dimensional Finite Element Study to Characterize the Influence of Load Direction on Stress Distribution in Bone Around Dental Implant

Abstract

This study aimed to establish a three-dimensional (3D) finite element model for variation of loading direction to identify its effects on the stress distribution generated around an implant and surrounding jawbone under biomechanical consideration. Twenty one 3D finite element cases containing the endosseous titanium implant in type II bone under three different loads i.e., 50, 100, and 200 N, with various directions from 0 to 30 degrees to the vertical axis with the increasing rate of 5 degrees were applied to analyze the stress distribution pattern in the implant and surrounding bone. For data analysis, the von Mises criterion was used. The results revealed that the oblique loading would significantly induce higher interfacial stresses compared to the vertical loading. The highest on Mises stress was observed in the implant for all the cases. An increasement of the angle of force both increased the maximum stress and worsened stress distribution patterns in the implant and supporting bone. The results suggest that under oblique load 30 the maximum von Mises stresses in the implant, cortical, and cancellous bones increase by 236%, 322%, and 22%, respectively. The findings of this study may have implications not only for understanding the stress distribution in implant and bone under various loading angles but also for determining an optimum implant for specific application in dentistry.

Biomechanical evaluation of stress distribution in subcrestal placed platform-switched short dental implants in D4 bone: In vitro finite-element model study

“…On the contrary, oblique load creates shear forces and lateral movements on the implant, thus leading to more stress on the surrounding bone. [ 29 30 ]…”

Comparative study of stress characteristics in surrounding bone during insertion of dental implants of three different thread designs: A three‐dimensional dynamic finite element study

“…According to Guan et al, different stress characteristics are produced by different sizes of implant surface contact areas (Guan, van Staden, Johnson, & Loo, 2011). Shamami et al state that the loading direction has a significant effect on the maximum stress values and stress distribution patterns in the implant/bone system (Shamami, Karimi, Beigzadeh, Derakhshan, & Navidbakhsh, 2014). Their continuous dynamic study emphasized that the size and shape of the thread geometry contacting the bone was a major factor characterizing the stress profile in the surrounding bone.…”

“…The implantation process distributes complex loading forces in various directions to the surrounding bone (Shamami, Karimi, Beigzadeh, Derakhshan, & Navidbakhsh, 2014). The loading direction has a significant effect on the maximum stress values and stress distribution patterns in the implant/bone system.…”

Three-Dimensional Finite Element Investigation Into Effects of Implant Thread Design and Loading Rate on Stress Distribution in Dental Implants and Anisotropic Bone

“…Dental implants have become increasingly common as a method for replacing missing teeth in recent decades [1][2][3][4]. However, while some studies have reported an implant success rate as high as 78-100% [5], other studies have indicated that single tooth replacement failures may occur for a variety of reasons [6], including implant surface, implant design, and bone quality factors [7] and early bone loss in the dental implant region [8]. Numerous studies have found a link between the success of dental implants, the biological tissue structure of the bone, the mechanical strength of the bone and implant, and the surgical technique employed to insert the implant [6,9,10].…”