scholarly journals Applications of Finite Element in Implant Dentistry and Oral Rehabilitation

2021 ◽  
Vol 15 (1) ◽  
pp. 392-397
Author(s):  
Van V. Dam ◽  
Hai A. Trinh ◽  
Dao T. Dung ◽  
Trinh D. Hai
Keyword(s):  
Finite Element ◽  
Dental Implant ◽  
Google Scholar ◽  
Stress Distributions ◽  
Oral Rehabilitation ◽  
Bone Implant ◽  
Bone Interface ◽  
Implant Dentistry

Finite element is widely applied in dentistry to study the stress distributions on adjoining bone, the biomechanics of dental implant and bone; implant and bone interface and study its fatigue behaviors of the implant. This article presents various applications of finite element in implant dentistry. Available articles were searched and reviewed from March 1980 till September 2020 from Pubmed, Scopus, Google Scholar, and Science direct. Relevant studies were included and critically analyzed. Finite element is an important tool in implant dentistry to study the stress distributions on adjoining bone, the biomechanics of dental implant and bone; implant and bone interface, and fatigue behaviors.

Effect of the Number of Dental Implant Neck Threads in Contact With the Cortical Bone on Interface Stresses Using Finite Element Method

2013 ◽  
Author(s):  
Mohammed Moustafa Hassan ◽  
Moahamed-Tarek El-Wakad ◽  
E. M. Bakr
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Cortical Bone ◽  
Dental Implant ◽  
Stress Reduction ◽  
Tooth Loss ◽  
Shape Parameters ◽  
Great Role ◽  
Element Analysis ◽  
Bone Interface

Dental implants are a valuable, safe and predictable solution for patients suffering from tooth loss. The implant shape plays a great role in the success of dental implant, due to its effect on stress distribution in the surrounding bones. Therefore, optimizing some of implant shape parameters may improve stress distribution and consequently may lead to an increase in implant success rate. In this study, the 3D finite element analysis is used to investigate the influence of the number of threads in the neck of the implant on the implant-cortical bone interface stresses. The stress distribution along the implant-bone interface and their displacements were determined using ABAQUS/CAE 6.10 software. Overall, the stress was highest in the cortical bone at the neck of implant and lowest in the cancellous bone regardless of the number of threads in contact with cortical bone. On the other hand, reducing the number of threads in the neck resulted in a decrease in the developed stresses in both types of bones. The developed stresses around the bones decreased gradually in cortical bones and dramatically in cancellous bones when the number of threads decreased in the neck of implant. The stress reduction between the smooth neck to the fully threaded neck decreased the developed stresses by 24% in the cortical bone. However, due to improve the implant osseointegration, it is recommended to keep one or two threads in the cortical bone.

Uncertainty optimization of dental implant based on finite element method, global sensitivity analysis and support vector regression

2018 ◽  
Vol 233 (2) ◽  
pp. 232-243 ◽  
Author(s):  
Hongyou Li ◽  
Maolin Shi ◽  
Xiaomei Liu ◽  
Yuying Shi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Support Vector Regression ◽  
Dental Implant ◽  
Support Vector ◽  
Manufacturing Cost ◽  
Bone Interface ◽  
Design Variables ◽  
Uncertainty Optimization ◽  
Element Method

In this work, an uncertainty optimization approach for dental implant is proposed to reduce the stress at implant–bone interface. Finite element method is utilized to calculate the stress at implant–bone interface, and support vector regression is used to replace finite element method to ease the computational cost. Deterministic optimization based on support vector regression is conducted, which demonstrates that the method using support vector regression replacing finite element method in dental implant optimization is efficient and reliable. Global sensitivity analysis based on support vector regression is used to assign different uncertainties (manufacturing errors) to different design variables to save the manufacturing cost. Two popular uncertainty optimization methods, k-sigma method and interval method, are used for the uncertainty optimization of dental implant. The results indicate that the stress at implant–bone interface is reduced greatly considering the uncertainties in design variables with the manufacturing cost increasing a little. This approach can be promoted to other types of bio-implants.

Numerical Analysis of the Equivalent Stress at the Interface Bone/Threaded Dental Implant

2017 ◽  
Vol 34 ◽  
pp. 82-93 ◽  
Author(s):  
Yamina Chelahi Chikr ◽  
Benali Boutabout ◽  
Ali Merdji ◽  
Kheira Bouzouina
Keyword(s):  
Dental Implant ◽  
Equivalent Stress ◽  
Three Dimensional ◽  
Dental Prosthesis ◽  
Published Data ◽  
Stress Distributions ◽  
Three Dimensional Model ◽  
Element Analysis ◽  
Bone Implant ◽  
Materials Used

The purpose of this study was to develop a new three-dimensional model of an osseointegrated molar dental prosthesis and to carry out finite element analysis to evaluate stress distributions and intensities in the bone and in the components of dental prosthesis under three loads (corono-apical, distal-mesial and buccal-lingual) were applied to the top of the occlusal face of the prosthesis crown. The interfacial stresses were also determined inside and outside of the threading when the dental prosthesis system was subjected to one of three masticatory loads. All materials used in the models were considered to be isotropic, homogeneous and linearly elastic. The elastic properties, loads and constraints used in the model were taken from published data. In this study, the stress concentration occurred around the threaded dental implant neck. Thus, this area should be preserved clinically in order to maintain the bone–implant interface structurally and functionally.

scholarly journals Guided surgery in dental implant: a systematic review

2021 ◽  
Vol 2 (5) ◽  
Author(s):  
José Fernando Paschoal Guimarães ◽  
Lafayete Caruzi Junior ◽  
Elias Naim Kassis
Keyword(s):  
Systematic Review ◽  
Dental Implant ◽  
Surgical Intervention ◽  
Cone Beam ◽  
Oral Rehabilitation ◽  
Guided Surgery ◽  
The Subject ◽  
Ct Data ◽  
Implant Dentistry

Introduction: In the context of implant dentistry, dental implants represent about 1,000,000 procedures per year worldwide. Virtual implant planning systems integrate cone beam computed tomography (CT) data to assess the amount of bone and virtual models for the project of a dental implant. Objective: It presented, through a systematic review, the main considerations of guided surgery in implant dentistry through evidence from clinical studies and important systematic reviews on the subject. Methods: The research was carried out from May 2021 to June 2021 and developed based on Scopus, PubMed, Science Direct, Scielo, and Google Scholar, following the Systematic Review-PRISMA rules. The quality of the studies was based on the GRADE instrument and the risk of bias was analyzed according to the Cochrane instrument. Results: A total of 112 articles were found on guided surgery and implantology. Initially, duplication of articles was excluded. In total, 54 articles were fully evaluated and 23 were included and evaluated in this study. In the GS scenario, advances in technology have contributed to the improvement of models with favorable positioning of implants in aesthetic terms. This provides the predictability of techniques and difficulties that may be encountered during surgical intervention, reducing time and the possibility of errors, allowing for an overall reduction in the costs of oral rehabilitation. Conclusion: Guided surgery is considered accurate and reliable compared to free implant surgery. However, the learning curve is undeniable and a clinician with basic surgical skills, including conventional implant dentistry.

Stress Reduction in Bone/Dental Implant Interface Using Elastomeric Stress Absorbers

2015 ◽  
Vol 1099 ◽  
pp. 129-139
Author(s):  
A. Belarbi ◽  
B. Mansouri ◽  
G. Mehdi ◽  
Mohamed Belhouari ◽  
Zitouni Azari
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Concentration ◽  
Dental Implant ◽  
Stress Reduction ◽  
Element Analysis ◽  
Mandibular Bone ◽  
Bone Implant ◽  
As Stress

This paper focused on optimal stress distribution in the mandibular bone surrounding a dental implant and devoted to the development of a modified Osteoplant implant type in order to minimize stress concentration in the bone/implant interface. This study investigated two elastomeric stress barriers incorporated into the dental implant using 3-D finite element analysis. Overall, this proposed implant provoked lower bone/implant interface stresses due to the effect of the elastomers as stress absorbers.Key Words: Dental implant, stress absorber, elastomer, finite element method

scholarly journals A comparative finite element analysis of two types of axial and radial functionally graded dental implants with titanium one around implant-bone interface

2017 ◽  
Vol 24 (5) ◽  
pp. 747-754 ◽  
Author(s):  
Hadi Asgharzadeh Shirazi ◽  
Majidreza Ayatollahi ◽  
Alireza Karimi ◽  
Mahdi Navidbakhsh
Keyword(s):  
Finite Element ◽  
Dental Implants ◽  
Dental Implant ◽  
Functionally Graded ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Bone Interface ◽  
The Common ◽  
Von Mises ◽  
Implant System

AbstractFunctionally graded biomaterials (FGBMs) have received significant attention in the recent years as potential candidates for the next generation of dental implant improvement. This happened due to their unique advantages and their ability to satisfy the requirements of both biomechanical and biocompatibility properties simultaneously. This study was aimed to analyze the effects of two radial and axial FGBM dental implants on the stress distribution near the dental implant-bone interface under a static load using finite element method (FEM). The model was restrained on a base supporting bone and vertically loaded with a force of 100 N on the top of the abutment. In the FGBM models, the implants are made of a combination of bioceramic and biometal composition, with properties that change gradually and continuously in the radial and axial directions. The numerical results indicated that the use of both radial and axial FGBM dental implants reduced the maximum von Mises stress in the cortical and the cancellous bones in comparison with the common titanium one, which leads to faster bone regeneration and early stabilization of dental implant system. The findings of the present study may have implications not only for understanding the stresses and deformations around the implant-bone interface but also for improving the performance as well as application of FGBMs in dental implant materials.

Finite element analysis on dental implant[ndash ]supported prostheses without passive fit

2002 ◽  
Vol 11 (1) ◽  
pp. 30-40 ◽  
Author(s):  
Chatchai Kunavisarut ◽  
Lisa A. Lang ◽  
Brian R. Stoner ◽  
David A. Felton
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dental Implant ◽  
Element Analysis ◽  
Passive Fit

Finite Element Analysis of Tire/Rim Interface Forces Under Braking and Cornering Loads

1992 ◽  
Vol 20 (2) ◽  
pp. 83-105 ◽  
Author(s):  
J. P. Jeusette ◽  
M. Theves
Keyword(s):  
Finite Element ◽  
Shear Stress ◽  
Contact Pressure ◽  
Element Model ◽  
Shear Stresses ◽  
Detailed Knowledge ◽  
Stress Distributions ◽  
Element Analysis ◽  
Plane Shear ◽  
Normal Contact

Abstract During vehicle braking and cornering, the tire's footprint region may see high normal contact pressures and in-plane shear stresses. The corresponding resultant forces and moments are transferred to the wheel. The optimal design of the tire bead area and the wheel requires a detailed knowledge of the contact pressure and shear stress distributions at the tire/rim interface. In this study, the forces and moments obtained from the simulation of a vehicle in stationary braking/cornering conditions are applied to a quasi-static braking/cornering tire finite element model. Detailed contact pressure and shear stress distributions at the tire/rim interface are computed for heavy braking and cornering maneuvers.

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