Influence of Model Discretization Density in FEM Numerical Analysis on the Determined Stress Level in Bone Surrounding Dental Implants

Żmudzki, J.; Walke, W.; Chladek, W.

doi:10.1007/978-3-540-68168-7_64

Cited by 10 publications

(5 citation statements)

References 11 publications

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“…However, FEA results are sensitive to mesh quality with tendency to overestimation of maximal value of stresses around the dental implant neck because of the presence of the singular point at the margin of bone contacted with the implant [24]. The better manner of estimation of an implant solution is to show the zone of destruction or the zone exposed to atrophy from overloading.…”

Section: Discussionmentioning

confidence: 99%

Full Contoured Tooth-Implant Supported 3-Pointic All-Ceramic Denture During Occlusal Load Transfer in Lateral Region

Żmudzki¹,

Malara²,

Chladek³

2016

Archives of Metallurgy and Materials

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Implant and a tooth supported dentures are avoided by dentists because of uneven distribution of occlusal loads between a stiffer implant and a more pliable tooth. The hypothesis was that a 3-point all-ceramic bridge supported on a natural second premolar tooth and a two-pieces typical implant bears safely mastication loads. The finite element analysis showed that the implant splinted by all-ceramic zirconium bridge with the second premolar was safe under lateral mastication load, but there was found an overload at wide zone of bone tissue around the implant under the load of 800 N. The patients can safely masticate, but comminution of hard food should be avoided and they should be instructed that after such an indiscretion they need to contact a dental professional, because, in spite of integrity of the prosthesis, the bone tissue around the implant may fail and there is a hazard of intrusion of the tooth.

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Section: Discussionmentioning

confidence: 99%

Full Contoured Tooth-Implant Supported 3-Pointic All-Ceramic Denture During Occlusal Load Transfer in Lateral Region

Żmudzki¹,

Malara²,

Chladek³

2016

Archives of Metallurgy and Materials

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“…According to many researchers [36,37], these stress results at singularity points cannot be considered to evaluate the strength of the endodontic file. To get around this issue, Żmudzki [32] proposes to exclude the stress results at these points and then extrapolate the extreme value from the stress values in the remaining nodes. Following this idea, Figure 10b shows a plot of the evolution of the von Mises stress along the observed edge.…”

Section: Interpretation Of the Results Of The Stress Analysismentioning

confidence: 99%

“…The resulting FE models were analyzed using ABAQUS [31] (Dassault Systèmes Simulia Corp, Providence, RI, USA). As suggested by Żmudzki [32,33], the convergence of the mesh can be assessed by means of an error energy norm E. In this error estimator, the stress vector σ σ σ and the averaged stress vector σ * σ * σ * are used to determine a stress error vector ∆σ ∆σ ∆σ:…”

Section: Mesh Convergence Studymentioning

confidence: 99%

Computerized Generation and Finite Element Stress Analysis of Endodontic Rotary Files

et al. 2021

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Introduction: The finite element method has been extensively used to analyze the mechanical behavior of endodontic rotary files under bending and torsional conditions. This methodology requires elevated computer-aided design skills to reproduce the geometry of the endodontic file, and also mathematical knowledge to perform the finite element analysis. In this study, an automated procedure is proposed for the computerized generation and finite element analysis of endodontic rotary files under bending and torsional conditions. Methods: An endodontic rotary file with a 25mm total length, 0.25mm at the tip, 1.20mm at 16mm from the tip, 2mm pitch and squared cross section was generated using the proposed procedure and submitted for analysis under bending and torsional conditions by clamping the last 3mm of the endodontic rotary file and applying a transverse load of 0.1N and a torsional moment of 0.3N·cm. Results: The results of the finite element analyses showed a maximum von Mises stress of 398MPa resulting from the bending analysis and a maximum von Mises stress of 843MPa resulting from the torsional analysis, both of which are next to the encastre point. Conclusions: The automated procedure allows an accurate description of the geometry of the endodontic file to be obtained based on its design parameters as well as a finite element model of the endodontic file from the previously generated geometry.

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“…The smaller the element size, the more accurate the analysis results. However, in certain cases, a smaller element size produces a higher calculation value compared to actual value obtained from the experiments [26]. In this situation, a limit must be set on the percentage error of the results obtained from calculations to determine the appropriate element size [27].…”

Section: Mesh Sensitivity Analysismentioning

confidence: 99%

Effect of Mesh Sensitivity and Cohesive Properties on Simulation of Typha Fiber/Epoxy Microbond Test

et al. 2020

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The microbond test for natural fibers is difficult to conduct experimentally due to several challenges including controlling the gap distance of the blade, the meniscus shape, and the large data spread. In this study, a finite element simulation was performed to investigate the effects of the bonding characteristics in the interface between the fiber and matrix on the Typha fiber/epoxy microbond test. Our aim was to obtain the accurate mesh and cohesive properties via simulation of the Typha fiber/epoxy microbond test using the cohesive zone model technique. The axisymmetric model was generated to model the microbond test specimen with a cohesive layer between the fiber and matrix. The cohesive parameter and mesh type were varied to determine the appropriate cohesive properties and mesh type. The fine mesh with 61,016 elements and cohesive properties including stiffness coefficients Knn = 2700 N/mm3, Ktt = 2700 N/mm3, and Kss = 2700 N/mm3; fracture energy of 15.15 N/mm; and damage initiation tnn = 270 N/mm2, ttt = 270 N/mm2, and tss = 270 N/mm2 were the most suitable. The cohesive zone model can describe the debonding process in the simulation of the Typha fiber/epoxy microbond test. Therefore, the results of the Typha fiber/epoxy microbond simulation can be used in the simulation of Typha fiber reinforced composites at the macro-scale.

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Influence of Model Discretization Density in FEM Numerical Analysis on the Determined Stress Level in Bone Surrounding Dental Implants

Cited by 10 publications

References 11 publications

Full Contoured Tooth-Implant Supported 3-Pointic All-Ceramic Denture During Occlusal Load Transfer in Lateral Region

Full Contoured Tooth-Implant Supported 3-Pointic All-Ceramic Denture During Occlusal Load Transfer in Lateral Region

Computerized Generation and Finite Element Stress Analysis of Endodontic Rotary Files

Effect of Mesh Sensitivity and Cohesive Properties on Simulation of Typha Fiber/Epoxy Microbond Test

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