Effects of Prosthetic Material and Framework Design on Stress Distribution in Dental Implants and Peripheral Bone: A Three-Dimensional Finite Element Analysis

Arınç, Hakan

doi:10.12659/msm.908208

Cited by 19 publications

(31 citation statements)

References 27 publications

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“…According to results to the present study, the tapered implant body (Model B) decreased stresses in both cortical and trabecular bone compared to the cylindric design (Model A). These results are in agreement with previously published data [18,19,[26][27][28][29], indicating that tapered implants could reduce peak stress in both cortical and trabecular bone. Stress analysis was performed for various implant designs by Li Huang et al [29] using three-dimensional finite element analysis approaches.…”

Section: Discussionsupporting

confidence: 93%

Finite Element Analysis of a New Dental Implant Design Optimized for the Desirable Stress Distribution in the Surrounding Bone Region

Paracchini¹,

Barbieri

Redaelli³

et al. 2020

Prosthesis

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Dental implant macro- and micro-shape should be designed to maximize the delivery of optimal favorable stresses in the surrounding bone region. The present study aimed to evaluate the stress distribution in cortical and cancellous bone surrounding two models of dental implants with the same diameter and length (4.0 × 11 mm) and different implant/neck design and thread patterns. Sample A was a standard cylindric implant with cylindric neck and V-shaped threads, and sample B was a new conical implant with reverse conical neck and with “nest shape” thread design, optimized for the favorable stress distribution in the peri-implant marginal bone region. Materials and methods: The three-dimensional model was composed of trabecular and cortical bone corresponding to the first premolar mandibular region. The response to static forces on the samples A and B were compared by finite element analysis (FEA) using an axial load of 100 N and an oblique load of 223.6 N (resulting from a vertical load of 100 N and a horizontal load of 200 N). Results: Both samples provided acceptable results under loadings, but the model B implant design showed lower strain values than the model A implant design, especially in cortical bone surrounding the neck region of the implant. Conclusions: Within the limitation of the present study, analyses suggest that the new dental implant design may minimize the transfer of stress to the peri-implant cortical bone.

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Section: Discussionsupporting

confidence: 93%

Finite Element Analysis of a New Dental Implant Design Optimized for the Desirable Stress Distribution in the Surrounding Bone Region

Paracchini¹,

Barbieri

Redaelli³

et al. 2020

Prosthesis

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“…Upon loading the implants, maximum compressive stress has been noted at the crestal region of the cortical bone in exposed and covered thread models, and this might be attributed for the difference of materials strength [27]. However, a high stress concentration was observed at the mid-lingual region in the C, TC, TR, and LF models, representing the peak stress in the C, TC, and TR models, while the peak stress was located on the disto-lingual side, corresponding to the point where the lower flank passes to the curved thread crest in the LF model, and where the upper flank passes to the curved thread root in the UF model.…”

Section: Discussionmentioning

confidence: 99%

Biomechanical Effect of an Exposed Dental Implant’s First Thread: A Three-Dimensional Finite Element Analysis Study

et al. 2019

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Background The purpose of this study was to assess the effect of different exposure levels of a dental implant’s first thread on adjacent bone stress and strain using the finite element analysis method. Material/Methods Three-dimensional models of 2 threaded implants and abutments with a mandibular bone segment were constructed to represent the covered (C) and exposed models. In the exposed models, the implant was first placed in the bone, and rotated around its axis a quarter-turn each time to simulate 4 different levels of first thread exposure at the mid-lingual side: Upper Flank (UF), Thread Crest (TC), Lower Flank (LF), and Thread Root (TR) models. Oblique forces were applied and analysis was performed. Results Maximum compressive stress magnitude and distribution varied according to the exposed thread profile. In the exposed group, peak stress ranged from 136 MPa to 197 MPa in TC and LF models, respectively, compared to 141 MPa in C model. In LF, UF, and C models, peak stress was observed at the mid-lingual side of the crestal region, while in TC and TR models, peak stress shifted distally in accordance with thread profile. However, alveolar bone volumes which exhibited compressive microstrain levels within the physiological loading and maintenance windows were relatively close in all models. Conclusions Results suggest that the exposed thread profile influences stress and strain outcomes in the adjacent bone; however, this influence is only limited to a small region around the exposed thread.

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“…Also, the shape of implant neck and its threat pattern can change the stress distribution in cortical and cancellous bones [11]. Moreover, alongside dimensional parameters, materials utilized for construction of prosthetics have significant effects on stress distribution and stress concentration in bones [12,13]. Compared to static loads, dynamic loads are associated with more critical effects, causing higher stress within the implant structures [14].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Fatigue Life for Dental Implants Using FEM Analysis

Ziaie

Khalili

2021

Prosthesis

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The purpose of this study is to numerically analyze a 3D model of an implant under fatigue loads. A bone and a V shape implant were modeled using SolidWorks2008 software. In order to obtain an exact model, the bone was assumed as a linear orthotropic material. Mechanical loads were applied in terms of fastening torque to the abutment and mastication force applied at the top of the crown. The abutment was tightened into the implant by applying a 35 N.cm torque causing tensile stress within the abutment screw as a preload that is harmful not only for the fatigue life of the abutment, but also for the stability of the implant-abutment interface. A 700 N force at an angle of 30 degrees to the vertical direction was applied to the crown. The mechanical analysis results showed that the abutment is the critical component of the implant system in terms of fatigue failure. This is due to the fact that the tensile preloads originated from the fastening torque. The results were presented in terms of fatigue life in the abutment. Fatigue life of the abutment and implant were calculated based on the Goodman, Soderberg, Smith–Watson–Topper (SWT), and Marrow theories. According to the results of the fatigue life prediction, abutment screws may fail after about 3 × 105 cycles. The predicted results by the Goodman theory are at a very good accordance with the clinical data.

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Effects of Prosthetic Material and Framework Design on Stress Distribution in Dental Implants and Peripheral Bone: A Three-Dimensional Finite Element Analysis

Cited by 19 publications

References 27 publications

Finite Element Analysis of a New Dental Implant Design Optimized for the Desirable Stress Distribution in the Surrounding Bone Region

Finite Element Analysis of a New Dental Implant Design Optimized for the Desirable Stress Distribution in the Surrounding Bone Region

Biomechanical Effect of an Exposed Dental Implant’s First Thread: A Three-Dimensional Finite Element Analysis Study

Evaluation of Fatigue Life for Dental Implants Using FEM Analysis

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