Numerical investigation on stress intensity around Bone-Implant interface by 3-Dimensional FEA and experimental verification by optical technique

Dhatrak, Pankaj; Shirsat, Uddhav; Sumanth, S.; Deshmukh, Vijay

doi:10.1016/j.matpr.2020.06.097

Cited by 17 publications

(6 citation statements)

References 23 publications

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“…Optimisation studies are a tool that allows for a refined selection of dental implants based on geometric parameters which will improve stress distribution at the bone-implant interface thus enhancing the probability of a successful osseointegration. 4,[10][11][12] The traditional procedure involves the evaluation of several models, each with a specific combination of parameters and then a comparison of the model results to the desired target. The model that yields results closest to the target is therefore defined as the best option.…”

Section: Resultsmentioning

confidence: 99%

“…4 Optimisation studies have been proposed as a method of enhancing implant design to improve stress distribution on mandibular bone. 4,[10][11][12][13] Optimisation analyses have been used to identify materials best suited for dental implants, 14 to refine implant thread design using minimisation of the equivalent von Mises stresses on peri-implant bone, 15 to determine optimal dimensions of implants for type IV bone 11 and to perfect designs of implants for use in fractured jaws. 13 The optimisation procedure combined with finite element models generally involves trials wherein several models, each one with a specific combination of parameters, are created.…”

Section: Introductionmentioning

confidence: 99%

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Novel and simplified optimisation pathway using response surface and design of experiments methodologies for dental implants based on the stress of the cortical bone

Freitas

Hernandez

Gonçalves

et al. 2021

Proc Inst Mech Eng H

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Dental implants are widely used as a long-term treatment solution for missing teeth. A titanium implant is inserted into the jawbone, acting as a replacement for the lost tooth root and can then support a denture, crown or bridge. This allows discreet and high-quality aesthetic and functional improvement, boosting patient confidence. The use of implants also restores normal functions such as speech and mastication. Once an implant is placed, the surrounding bone will fuse to the titanium in a process known as osseointegration. The success of osseointegration is dependent on stress distribution within the surrounding bone and thus implant geometry plays an important role in it. Optimisation analyses are used to identify the geometry which results in the most favourable stress distribution, but the traditional methodology is inefficient, requiring analysis of numerous models and parameter combinations to identify the optimal solution. A proposed improvement to the traditional methodology includes the use of Design of Experiments (DOE) together with Response Surface Methodology (RSM). This would allow for a well-reasoned combination of parameters to be proposed. This study aims to use DOE, RSM and finite element models to develop a simplified optimisation analysis method for dental implant design. Drawing on data and results from previous studies, two-dimensional finite element models of a single Branemark implant, a multi-unit abutment, two prosthetic screws, a prosthetic crown and a region of mandibular bone were built. A small number of combinations of implant diameter and length were set based on the DOE method to analyse the influence of geometry on stress distribution at the bone-implant interface. The results agreed with previous studies and indicated that implant length is the critical parameter in reducing stress on cortical bone. The proposed method represents a more efficient analysis of multiple geometrical combinations with reduced time and computational cost, using fewer than a third of the models required by the traditional methods. Further work should include the application of this methodology to optimisation analyses using three-dimensional finite element models.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel and simplified optimisation pathway using response surface and design of experiments methodologies for dental implants based on the stress of the cortical bone

Freitas

Hernandez

Gonçalves

et al. 2021

Proc Inst Mech Eng H

View full text Add to dashboard Cite

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“…In order to replicate masticatory loading and horizontal movement of the mandible, three load cases were considered to find the stresses generated at the implant-bone interface. 40,41,43 All the implant models were subjected to three loading conditions: a 100 N masticatory load (vertical load) along the vertical axis, a 40 N lateral load perpendicular to the implant axis and a 100 N oblique load at 45° to the implant axis. All three loading conditions were applied on the crown surface shown in Figure 4(a).…”

Section: Methodsmentioning

confidence: 99%

“…The crown was meshed using linear shell elements (S3R/S4R) with a 0.5 mm average size. 35,39,40 The implant-bone interface was meshed with finer mesh to improve the accuracy while solving. FE models' convergence was verified to achieve a balance between the accuracy of FE results and computing resources.…”

Section: Finite Element Modellingmentioning

confidence: 99%

“…FE models' convergence was verified to achieve a balance between the accuracy of FE results and computing resources. 40 The mesh size of the elements was varied to monitor the highest value of equivalent stresses (von Mises stresses) generated in the implant-bone assembly, and when the variation was less than 5%, the convergence criterion based on the mesh size was said to be met as shown in Table 1. Based on the convergence criteria (Figure 3) the number of nodes and elements for bone and implants model have been summarised in Table 2.…”

Section: Finite Element Modellingmentioning

confidence: 99%

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Influence of surface coatings on the stress distribution by varying friction contact at implant-bone interface using finite element analysis

Dhatrak

Kurup

Khasnis

2023

Proc Inst Mech Eng H

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The present work aims to evaluate the effect of various surface coatings of titanium dental implants by varying the friction coefficient (µ) at the interface between the dental implant and jawbone using finite element analysis (FEA) methods and to provide a comparative analysis between the various surface coatings and implant designs. An accurate model of the dental implant prosthetics consisting of the hard (cortical) and the soft (cancellous) bone, with the various titanium dental implant designs was modelled using a 3D CAD software, and the FE mesh model was generated using HyperMesh 13.0. Three coatings having different coefficient of friction values were selected: Titanium Nitride (TiN) with a friction coefficient of 0.19, Titanium Oxide (TiO2) with a friction coefficient of 0.30 and Zirconium Nitride (ZrN) with a coefficient of friction of 0.49. The non-linear static stress analysis was conducted under three different loading conditions (vertical, lateral and oblique loading) using a CAE solver. The present study showed that surface coatings with high friction coefficients generated lower stresses in the cancellous bone while generating higher stresses in the cortical bone. However, for dental implants having microthreads in their neck region, surface coatings with a high coefficient of friction generated lower stresses at the interface between the cortical bone and the implant. The FEA results indicate that selecting suitable surface coatings would significantly decrease the stresses developed at the bone-implant interface, and future studies should conduct in vivo trials to validate the FEA results obtained.

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Evaluating the Feasibility of Short Dental Implants as Alternatives to Long Dental Implants in Mandibular Bone: A Finite Element Study

Deshmukh,

Dhatrak

2024

J Biomed Mater Res

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This study uses finite element analysis to investigate the potential application of shorter dental implants as a substitute for longer implants in the lower jaw (mandible). FEA allows the evaluation of the stress patterns around the implant‐bone interface, a critical factor for successful osseointegration. Ten models were generated, encompassing five long (L1‐L5) and five short implant models (S1‐S5) with variations in diameter and length. Hypermesh software was utilized to meticulously prepare the FEA models, ensuring accurate mesh generation. The FEA simulations were conducted under four distinct loading scenarios (100 N occlusal load, 40 N lateral load, 100 N oblique at 30°, and 100 N oblique at 45°) to realistically mimic the forces exerted during biting, using an ABAQUS CAE solver. The results revealed that the von Mises stress generated within the short implant models was demonstrably lower compared to their long implants. Additionally, a significant drop in stress was observed with increasing the diameter of the short implants, to a certain diameter range. These findings suggest the potential for successful substitution of long implant model L4 with short implant model S4 due to the demonstrably lower stress values achieved. Furthermore, the data indicates the possibility of utilizing short implant models S3 and S5 as alternatives to long implant models L3 and L5, respectively. These observations hold significant promise for evaluating the feasibility of replacing long implants with shorter variants, potentially leading to a reduction in implant‐related failures.

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Numerical investigation on stress intensity around Bone-Implant interface by 3-Dimensional FEA and experimental verification by optical technique

Cited by 17 publications

References 23 publications

Novel and simplified optimisation pathway using response surface and design of experiments methodologies for dental implants based on the stress of the cortical bone

Novel and simplified optimisation pathway using response surface and design of experiments methodologies for dental implants based on the stress of the cortical bone

Influence of surface coatings on the stress distribution by varying friction contact at implant-bone interface using finite element analysis

Evaluating the Feasibility of Short Dental Implants as Alternatives to Long Dental Implants in Mandibular Bone: A Finite Element Study

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