Finite element analysis of stress concentration between surface coated implants and non surface coated implants - An in vitro study

Ts Satyanarayana,E Subramanyam,R Akula,T Illango,V Mutyala,R Rai

doi:10.4317/jced.55915

Abstract

BackgroundTo determine qualitative comparison in stress distribution between surface coated implants and non surface coated implants using 2 different lengths and vertical, oblique, and lateral forces.Material and Methods3 dimensional finite element study was carried out at first molar site with 4 surface coated and 4 non surface coated implants using mimic 8.11, solid edge 2004, hypermesh 9.0, and ansys12.1 software.ResultsThe pattern of stress distribution was almost similar between vertical and oblique loading but varied with lateral loads between surface coated and non surface coated implants. As the length of the implants increased stress concentration had no significant variation between surface coated and non surface coated implants, but had a tendency to increase at the abutment and abutment screw on all 3 forces.ConclusionsAmong the surface coated and non surface implants the pattern of stress distribution was similar signifying that surface coating of implants had no significant role in stress distribution using 3d finite element analysis and within the limitations of this study. Key words:Surface coating, non surface coating, implants, stress and bone.

Highlights

Significant progress has been made in the clinical use of oral and maxillofacial implants over the past three decades
Abutment type has significant influence on the stress distribution because of different load transfer mechanisms and the differences in size of contact area between the abutment and implant Heoung jae et al have concluded that the internal hex abutment generated the least von mises stress for all the loading condition so straight abutments with internal hex were used in this study (13)
Renouard et al, trying to explore the high failure rates of short implants, revealed that the surgical protocol used for short implant insertion did not include factors such as the evaluation of the bone quality and the implant surface. so surface coated commercially available tapered internal hex implants with different lengths were used in this study. -Sites of maximum and minimum stress concentration A consistent observation from all the models was concentration of maximum stress at the bone-implant interface at the level of neck of implant

Summary

Introduction

Significant progress has been made in the clinical use of oral and maxillofacial implants over the past three decades. To determine qualitative comparison in stress distribution between surface coated implants and non surface coated implants using 2 different lengths and vertical, oblique, and lateral forces. Results: The pattern of stress distribution was almost similar between vertical and oblique loading but varied with lateral loads between surface coated and non surface coated implants. As the length of the implants increased stress concentration had no significant variation between surface coated and non surface coated implants, but had a tendency to increase at the abutment and abutment screw on all 3 forces. Conclusions: Among the surface coated and non surface implants the pattern of stress distribution was similar signifying that surface coating of implants had no significant role in stress distribution using 3d finite element analysis and within the limitations of this study

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Methods

Results

Discussion

Conclusion