scholarly journals Consequences of Peri-Implant Bone Loss in the Occlusal Load Transfer to the Supporting Bone in terms of Magnitude of Stress, Strain, and Stress Distribution: A Finite Element Analysis

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Esteban Pérez-Pevida ◽  
David Chávarri-Prado ◽  
Markel Diéguez-Pereira ◽  
Alejandro Estrada-Martínez ◽  
Oier Montalbán-Vadillo ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Bone Loss ◽  
Trabecular Bone ◽  
Dental Implants ◽  
Load Transfer ◽  
Control Model ◽  
Marginal Bone Loss ◽  
Test Models ◽  
Occlusal Load

Background and Objective. Marginal bone loss around dental implants is one of the most prevalent complication, and its biomechanical impact may be critical for treatment prognosis. The objective of this study was to evaluate the influence of marginal bone loss around dental implants in the occlusal load transfer to the bone in terms of magnitude of stress and strain and distribution of such transferred stress. Methods. Three models of a single internal connection bone level-type implant inserted into a posterior mandible bone section were constructed using a 3D finite element software: one control model without marginal bone loss and two test models, both with a circumferential peri-implant bone defect, one with a 3 mm high defect and the other one 6 mm high. A 150 N static load was tested on the central fossa at 6° relative to the axial axis of the implant. Results. The results showed differences in the magnitude of strain and stress transferred to the bone between models, being the higher strain found in the trabecular bone around the implant with greater marginal bone loss. Stress distribution differed between models, being concentrated at the cortical bone in the control model and at the trabecular bone in the test models. Conclusion. Marginal bone loss around dental implants under occlusal loading influences the magnitude and distribution of the stress transferred and the deformation of peri-implant bone, being higher as the bone loss increases.

Influence of Abutment Design on Stress Distribution in Narrow Implants with Marginal Bone Loss: A Finite Element Analysis

2021 ◽  
Vol 36 (4) ◽  
pp. 640-649
Author(s):  
Serdar Yenigun ◽  
Pinar Ercal ◽  
Elif Ozden-Yenigun ◽  
Ahmet Katiboglu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Bone Loss ◽  
Marginal Bone Loss ◽  
Element Analysis

scholarly journals Three-Dimensional Finite Element Investigation into Effects of Implant Thread Design and Loading Rate on Stress Distribution in Dental Implants and Anisotropic Bone

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6974
Author(s):  
Dawit-Bogale Alemayehu ◽  
Yeau-Ren Jeng
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Dental Implants ◽  
Loading Rate ◽  
Bone Structure ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Bone Material ◽  
Surrounding Bone ◽  
Occlusal Load

Variations in the implant thread shape and occlusal load behavior may result in significant changes in the biological and mechanical properties of dental implants and surrounding bone tissue. Most previous studies consider a single implant thread design, an isotropic bone structure, and a static occlusal load. However, the effects of different thread designs, bone material properties, and loading conditions are important concerns in clinical practice. Accordingly, the present study performs Finite Element Analysis (FEA) simulations to investigate the static, quasi-static and dynamic response of the implant and implanted bone material under various thread designs and occlusal loading directions (buccal-lingual, mesiodistal and apical). The simulations focus specifically on the von Mises stress, displacement, shear stress, compressive stress, and tensile stress within the implant and the surrounding bone. The results show that the thread design and occlusal loading rate have a significant effect on the stress distribution and deformation of the implant and bone structure during clinical applications. Overall, the results provide a useful insight into the design of enhanced dental implants for an improved load transfer efficiency and success rate.

scholarly journals Three-Dimensional Finite Element Investigation Into Effects of Implant Thread Design and Loading Rate on Stress Distribution in Dental Implants and Anisotropic Bone

2021 ◽  
Author(s):  
Dawit Bogale Alemayehu ◽  
Yeau Ren Jeng
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Dental Implants ◽  
Loading Rate ◽  
Bone Structure ◽  
Von Mises Stress ◽  
Element Analysis ◽  
Bone Material ◽  
Surrounding Bone ◽  
Occlusal Load

Variations in the implant thread shape and occlusal load behavior may result in significant changes in the biological and mechanical properties of dental implants and surrounding bone tissue. Most previous studies consider a single implant thread design, an isotropic bone structure, and a static occlusal load. However, the effects of different thread designs, bone material properties, and loading conditions are important concerns in clinical practice. Accordingly, the present study performs Finite Element Analysis (FEA) simulations to investigate the static, quasi-static and dynamic response of the implant and implanted bone material under various thread designs and occlusal loading directions (buccal-lingual, mesiodistal and apical). The simulations focus specifically on the von Mises stress, displacement, shear stress, compressive stress and tensile stress within the implant and the surrounding bone. The results show that the thread design and occlusal loading rate have a significant effect on the stress distribution and deformation of the implant and bone structure during clinical applications. Overall, the results provide a useful insight into the design of enhanced dental implants for an improved load transfer efficiency and success rate.

scholarly journals Biomechanical behavior of periodontally compromised dento-alveolar complex before and after regenerative therapy - a proof of concept

2020 ◽  
pp. 116-116
Author(s):  
Natasa Nikolic-Jakoba ◽  
Milena Barac ◽  
Ksenija Zelic ◽  
Arso Vukicevic ◽  
Gordana Jovicic ◽  
...  
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Bone Loss ◽  
Periodontal Therapy ◽  
Patient Specific ◽  
Regenerative Therapy ◽  
Biomechanical Behavior ◽  
Regenerative Periodontal Therapy ◽  
The Impact ◽  
Occlusal Load

Introduction/Objective. Finite element analysis (FEA) is mathematical method which can be used for the assessment of biomechanical behavior of dento-alveolar complex. The objective was to analyze biomechanical behavior changes of teeth and supporting tissues under occlusal load in cases of horizontal and vertical alveolar bone loss, to assess potential impact of tooth displacement and altered stress distribution on further damage, and to evaluate the impact of regenerative periodontal therapy. Methods. Three patient-specific three-dimensional-Finite-Element (3D FE) models were developed from the acquired cone beam computed tomography, comprising the patient's upper left canine, first and second premolar, and adjacent bone. Model 1 represented horizontal bone loss; Model 2 included intrabony defect along distal aspect of tooth #24. Model 3 represented situation six months after the regenerative periodontal surgery. Displacement, Von Mises, and principal stresses were evaluated through FEA, under moderate vertical occlusal load. Results. FEA demonstrated that in model with vertical bone loss significant tooth displacement was present, even though the clinically evident tooth mobility was absent. Biomechanical behavior and stress distribution of teeth and surrounding tissues under moderate occlusal load was much more altered in case with vertical bone loss in comparison with horizontal bone loss. Six months following the regenerative therapy, the values of all evaluated parameters were noticeable reduced. Conclusion. Regenerative periodontal therapy improved the biomechanical characteristics of the affected teeth and the related periodontal structures.

Finite-Element Study of Biomechanical Explanations for Bone Loss around Dental Implants

2020 ◽  
Vol 30 (1) ◽  
pp. 21-30
Author(s):  
Ali Merdji ◽  
Belaid Taharou ◽  
Rajshree Hillstrom ◽  
Ali Benaissa ◽  
Sandipan Roy ◽  
...  
Keyword(s):  
Finite Element ◽  
Bone Loss ◽  
Dental Implants ◽  
Finite Element Study ◽  
Element Study

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

2021 ◽  
pp. 095441192110253
Author(s):  
João PO Freitas ◽  
Bruno Agostinho Hernandez ◽  
Paulo J Paupitz Gonçalves ◽  
Edmea C Baptista ◽  
Edson A Capello Sousa
Keyword(s):  
Finite Element ◽  
Stress Distribution ◽  
Design Of Experiments ◽  
Cortical Bone ◽  
Response Surface ◽  
Dental Implants ◽  
Finite Element Models ◽  
Long Term Treatment ◽  
Dimensional Finite Element ◽  
Surrounding Bone

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.

scholarly journals Clinical outcomes of dental implants placed in the same region where previous implants failed due to peri-implantitis: a retrospective study

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Eduardo Anitua ◽  
Adriana Montalvillo ◽  
Asier Eguia ◽  
Mohammad Hamdan Alkhraisat
Keyword(s):  
Retrospective Study ◽  
Survival Rate ◽  
Bone Loss ◽  
Clinical Outcomes ◽  
Dental Implants ◽  
Demographic Data ◽  
High Survival ◽  
Implant Survival ◽  
Marginal Bone Loss ◽  
Bone Level

Abstract Purpose There is paucity in the studies that assess dental implants replacing failed dental implants due to peri-implantitis. This study aims to evaluate the clinical outcomes of these implants in terms of implant survival and marginal bone loss. Methods Patients in this retrospective study were selected if having one or more implants removed due to peri-implantitis and the placement and loading of dental implants in the same region from April 2010 to December 2019. Information was collected about the patient's demographic data, implant dimensions, surgical and prosthetic variables. Changes in peri-implant bone level, cumulative implant survival rate and technical complications were assessed. Results Three hundred and eighty one dental implants in 146 patients that were placed in the same position or one-tooth position mesially/distally to the site of explantation were included. The patients' mean age was 63 ± 10 years. Ninety seven patients were females and 49 were males. After a mean follow-up of 34 ± 17 months, two implants failed. The cumulative survival rate was 99%. The marginal bone loss was −0.1 ± 0.6. Immediate or delay replacement of the failed implant did not affect implant survival or marginal bone stability. All the prostheses were screw-retained and presented the following complications: ceramic chipping (3 events), resin tooth fracture (1 event) and prosthetic screw loosening (1 event). Conclusions Dental implants replacing failed implants due to peri-implantitis would be an option in the management of peri-implantitis. They showed high survival rate and marginal bone stability.

The prosthetic abutment height can affect marginal bone loss around dental implants

2018 ◽  
Vol 20 (5) ◽  
pp. 799-805 ◽  
Author(s):  
Bo-Ah Lee ◽  
Byoung-Heon Kim ◽  
Helen H.I. Kweon ◽  
Young-Taek Kim
Keyword(s):  
Bone Loss ◽  
Dental Implants ◽  
Marginal Bone Loss
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