A 3D Nonlinear Finite Element Study on Biomechanical Behavior of Dental Implants

2010 ◽  
Vol 97-101 ◽  
pp. 3263-3267
Author(s):  
Ting Wu ◽  
Wen He Liao ◽  
Ning Dai
Keyword(s):  
Finite Element ◽  
Dental Implant ◽  
Nonlinear Finite Element ◽  
Geometrical Parameters ◽  
Element Analysis ◽  
Biomechanical Behavior ◽  
Bone Stress ◽  
Implant Abutment ◽  
Bone Preservation

In this paper biomechanical behavior of dental implant and surrounding bone system are investigated under static occlusal loads through 3D nonlinear finite element analysis (FEA), taking into account the interaction of implant-bone and implant-abutment contact interfaces. Stress-based performances of four commercially-available dental implant systems are evaluated in detail, demonstrating that implant and bone stability is strongly affected by implant-abutment connection structure as well as by a number of geometrical parameters. The results also indicate that platform-switching configuration can significantly reduce the crestal bone stress peaks, which contributes to the bone preservation for long-term success.

scholarly journals Relationships of Stresses on Alveolar Bone and Abutment of Dental Implant from Various Bite Forces by Three-Dimensional Finite Element Analysis

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Xiaoning Kang ◽  
Yiming Li ◽  
Yixi Wang ◽  
Yao Zhang ◽  
Dongsheng Yu ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dental Implant ◽  
Alveolar Bone ◽  
Three Dimensional ◽  
Central Incisor ◽  
Element Analysis ◽  
Implant Abutment ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Occlusal trauma caused by improper bite forces owing to the lack of periodontal membrane may lead to bone resorption, which is still a problem for the success of dental implant. In our study, to avoid occlusal trauma, we put forward a hypothesis that a microelectromechanical system (MEMS) pressure sensor is settled on an implant abutment to track stress on the abutment and predict the stress on alveolar bone for controlling bite forces in real time. Loading forces of different magnitudes (0 N–100 N) and angles (0–90°) were applied to the crown of the dental implant of the left central incisor in a maxillary model. The stress distribution on the abutment and alveolar bone were analyzed using a three-dimensional finite element analysis (3D FEA). Then, the quantitative relation between them was derived using Origin 2017 software. The results show that the relation between the loading forces and the stresses on the alveolar bone and abutment could be described as 3D surface equations associated with the sine function. The appropriate range of stress on the implant abutment is 1.5 MPa–8.66 MPa, and the acceptable loading force range on the dental implant of the left maxillary central incisor is approximately 6 N–86 N. These results could be used as a reference for the layout of MEMS pressure sensors to maintain alveolar bone dynamic remodeling balance.

scholarly journals Biomechanical Evaluation of the Effects of Implant Neck Wall Thickness and Abutment Screw Size: A 3D Nonlinear Finite Element Analysis

2020 ◽  
Vol 10 (10) ◽  
pp. 3471 ◽  
Author(s):  
Ming-Dih Jeng ◽  
Yang-Sung Lin ◽  
Chun-Li Lin
Keyword(s):  
Finite Element ◽  
Wall Thickness ◽  
Alveolar Bone ◽  
Nonlinear Finite Element ◽  
Bone Strain ◽  
Concentrated Force ◽  
Element Analysis ◽  
Implant Abutment ◽  
Implant System ◽  
Abutment Screw

In this study, we evaluate the influence of implant neck wall thickness and abutment screw size on alveolar bone and implant component biomechanical responses using nonlinear finite element (FE) analysis. Twelve internal hexagon Morse taper implant–abutment connection FE models with three different implant sizes (diameters 4, 5, and 6 mm), secured with 1.4, 1.6, and 1.8 mm abutment screws to fit with three unilateral implant neck wall thicknesses of 0.45, 0.50, and 1.00 mm, were constructed to perform simulations. Nonlinear contact elements were used to simulate realistic interface fixation within the implant system. A 200 N concentrated force was applied toward the center of a hemispherical load cap and inclined 30° relative to the implant axis as the loading condition. The simulation results indicated that increasing the unilateral implant neck wall thickness from 0.45 to 1.00 mm can significantly decrease implant, abutment, and abutment screw stresses and bone strain, decreased to 58%, 48%, 54%, and 70%, respectively. Variations in abutment screw size only significantly influenced abutment screw stress, and the maximum stress dissipation rates were 10% and 29% when the diameter was increased from 1.4 to 1.6 and 1.8 mm, respectively. We conclude that the unilateral implant neck wall thickness is the major design factor for the implant system and implant neck wall thickness in effectively decreasing implant, abutment, and abutment screw stresses and bone strain.

Residual Ultimate Strength of Steel Plates with Longitudinal Crack and Pitting Corrosion under Axial compression: Nonlinear Finite Element Method Investigations

2020 ◽  
pp. 1-12
Author(s):  
Farzaneh Ahmadi ◽  
Ahmad Rahbar Ranji
Keyword(s):  
Finite Element ◽  
Crack Length ◽  
Ultimate Strength ◽  
Failure Modes ◽  
Great Influence ◽  
Longitudinal Crack ◽  
Nonlinear Finite Element ◽  
Geometrical Parameters ◽  
Rectangular Plates ◽  
Element Analysis

The main aim of present study was to determine the ultimate strength of cracked and corroded plates under uniform in-plane compression. Corrosion is considered as pitting-type corrosion at one side of the plate with a central longitudinal crack. Nonlinear finite element analysis using commercial computer code, ANSYS, is used to determine the ultimate strength of deteriorated plates. Different geometrical parameters, including the aspect ratio (AR) and thickness of the plate, number of pits, pit depth-to-thickness ratio, and crack length, are considered. It is found that the AR of plates have great influence on the ultimate strength of cracked-pitted plates. Because of the position and orientation of the crack, the length of central longitudinal crack has no influence on ultimate strength reduction of cracked and cracked-pitted plates. The results show that regardless of the number of pits and crack length, in thin plates where buckling controls failure modes at ultimate strength, the number of pits has less influence on reduction of the ultimate strength than thick plates where yielding controls failure mode. Also it is concluded that in rectangular plates, arrangements of pits has more effect on reduction of the ultimate strength of cracked-pitted plates than the number of pits.

Biomechanical evaluation of different implant–abutment connections, retention systems, and restorative materials in the implant-supported single crowns using 3D finite element

2021 ◽  
Author(s):  
Cleidiel Aparecido Araujo Lemos ◽  
Fellippo Ramos Verri ◽  
Pedro Yoshito Noritomi ◽  
Victor Eduardo Souza Batista ◽  
Ronaldo Silva Cruz ◽  
...  
Keyword(s):  
Finite Element ◽  
Cortical Bone ◽  
Bone Tissue ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Biomechanical Behavior ◽  
Retention System ◽  
Implant Abutment ◽  
Fixation Screw ◽  
Metal Ceramic

This is an in silico study aimed to evaluate the biomechanical influence of different implant–abutment interfaces (external hexagon and Morse taper implants), retention systems (cement- and screw-retained), and restorative crowns (metal–ceramic and monolithic) using three-dimensional finite element analysis (3D-FEA). Eight 3D models were simulated for the maxillary first molar area using InVesalius, Rhinoceros, and SolidWorks and processed using the Femap and NEi Nastran softwares. Axial and oblique forces of 200 N and 100 N, respectively, were applied on the occlusal surface of the prostheses. Microstrain and von Mises stress maps were used to evaluate the deformation (cortical bone tissue) and stress (implants/fixation screws/crowns), respectively for each model. For both loadings, Morse taper implants had lower microstrain values than the external hexagon implants. The retention system did not affect microstrain on the cortical bone tissue under both loadings. However, the cemented prosthesis displayed higher stress with the fixation screw than the external hexagon implants. No difference was observed between the metal–ceramic and zirconia monolithic crowns in terms of microstrain and stress distribution on the cortical bone, implants or components. Morse taper implants can be considered as a good alternative for dental implant rehabilitation because they demonstrated better biomechanical behavior for the bone and fixation screw as compared to external hexagon implants. Cement-retained prosthesis increased the stress on the fixation screw of the external hexagon implants, thereby increasing the risk of screw loosening/fracture in the posterior maxillary area. The use of metal–ceramic or monolithic crowns did not affect the biomechanical behavior of the evaluated structures.

Compressive Stress Relaxation and Nonlinear Finite Element Analysis of Ethylene/Acrylic Vamac® Terpolymer Elastomer (AEM)

2004 ◽  
Author(s):  
Rick D. Fong ◽  
Erol Sancaktar
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Relaxation ◽  
Compressive Stress ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Time Dependency ◽  
Element Analysis ◽  
Shape Factors

The main purpose of this paper is to investigate the time dependency of rubber viscoelastic characteristics at various shape factors (SF) and compression percentages (%), namely Compressive Stress Relaxation (CSR) and Retaining Sealing Force (RSF). Results from nonlinear Finite Element Analysis (FEA) were found corresponding with the static CSR data, which could be used for estimating long term CSR effects of particular products with similar SF and compression % and operation environments.

The Effect of Bone Modulus on the Stress Distribution in a Dental Implant: A 3D Finite Element Analysis

2002 ◽  
Author(s):  
Dinc¸er Bozkaya ◽  
Sinan Mu¨ftu¨
Keyword(s):  
Mechanical Properties ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Dental Implants ◽  
Dental Implant ◽  
Distribution Characteristics ◽  
Element Analysis ◽  
3D Finite Element

The long-term success of dental implants depends, in part, on the stress distribution created in the bone, when the implant is loaded by biting forces. In this presentation, we present our findings on the stress distribution characteristics of a dental implant by varying bone mechanical properties surrounding the implant.

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