scholarly journals A Comparative Study of the Stress Distribution in Different Endodontic Post-Retained Teeth with and without Ferrule Design—A Finite Element Analysis

2011 ◽  
Vol 2011 ◽  
pp. 1-8 ◽  
Author(s):  
Lokanath Garhnayak ◽  
Hari Parkash ◽  
D. K. Sehgal ◽  
Veena Jain ◽  
Mirna Garhnayak
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Stress Distribution ◽  
Stress Reduction ◽  
Composite Resin ◽  
Element Analysis ◽  
Fiber Reinforced Composite ◽  
Nickel Chromium ◽  
Reinforced Composite ◽  
Resin Core

Purpose. To analyze the stress distribution in an endodontically treated maxillary central incisor restored with various post-core systems and assess the benefit of ferrule using finite element analysis. Material and Methods. Twelve models with metal ceramic crown were created based on the combination of three types of post-core systems (titanium post-composite resin core, nickel-chromium post-core, and fiber reinforced composite resin post-composite resin core), two varieties of posts (tapered, parallel), and with or without ferrule. 100 N load was applied in three directions and the von Mises stress was compared. Results. Ferrule made no difference in stress distribution for the titanium and nickel-chromium posts, though it showed some stress reduction in fiber-reinforced composite resin posts. Nickel-chromium cast post-core transmitted the least amount of stresses to the dentin despite producing the maximum stress. Conclusion. Incorporation of ferrule offered some degree of stress reduction in nonmetal post, and it increased the stresses within cervical dentin.

Stress Distribution Surrounding Endodontic Prefabricated Parallel Post

2015 ◽  
Vol 752-753 ◽  
pp. 39-43 ◽  
Author(s):  
Wasim M.K. Helal ◽  
Dong Yan Shi
Keyword(s):  
Finite Element Analysis ◽  
Stress Distribution ◽  
Gold Alloy ◽  
Composite Resin ◽  
Optimization Technique ◽  
Element Analysis ◽  
Fiber Reinforced Composite ◽  
Flowable Composite ◽  
Reinforced Composite ◽  
Optimum Material

<p class="p0">The identification of the optimum material of an endodontic prefabricated parallel post (EPPP) is carried out in the current study. The primary goal of the current work is to analyze the effect of post material on the stress distribution surrounding EPPP. Ten different post materials: 1-carbon fibre (CF), 2-gold alloy (GA), 3-titanium alloy (TA), 4-stainless steel (SS), 5-composite resin (CR), 6-fiber reinforced composite (FRFC), 7-carbon (C), 8-glass fiber (GF), 9-zirconia (Z), and 10-ribbond fiber+bonding agent+flowable composite (RBF) are used in the present work. In order to identify the best post material, the stress distribution surrounding EPPP with the previous materials are investigated through finite element analysis (FEA). The results obtained show that, the best material of an EPPP is GF. In this study, in order to identify the optimum material of an EPPP, the optimization technique is adopted. The results obtained show that, the optimum values of elastic modulus (E) and Poisson’s ratio (υ) equal to 63.69 GPa and 0.214115, respectively. These resulting values mean that, the optimum material of an EPPP is borosillicate glass (BG).</p>

scholarly journals Multi-Fiber-Reinforced Composites for the Coronoradicular Reconstruction of Premolar Teeth: A Finite Element Analysis

2018 ◽  
Vol 2018 ◽  
pp. 1-6
Author(s):  
Raphaël Richert ◽  
Philip Robinson ◽  
Gilbert Viguie ◽  
Jean-Christophe Farges ◽  
Maxime Ducret
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Clinical Success ◽  
Root Anatomy ◽  
Fiber Reinforced ◽  
Element Analysis ◽  
Fiber Reinforced Composite ◽  
Risk Of Fracture ◽  
Extreme Stress ◽  
Reinforced Composite

A coronoradicular reconstruction (CRR) has conventionally used a metallic inlay core (MIC) or a single-fiber-reinforced composite (sFRC) but extensive dentin removal can lead to root fracture. We propose herein a multi-fiber-reinforced composite (mFRC) based on a bundle of thin flexible fibers that can be adapted to the root anatomy without removing additional dentin. The aim of this study was to compare the mechanical behavior of the root reconstructed with mFRC, MIC, or sFRC using a finite element analysis (FEA). Models with or without a ferrule effect were created using Autodesk© software and divided into four parts: root, post, bonding composite or cement, and zirconia crown. For both models, extreme stress values (ESV), stress distribution, and risk of fracture were calculated for an oblique force (45°) of 100 N applied to the top of the buccal cusp. Results indicated that mFRC and mFRCG present a lower risk of fracture of the root and of the CRR without ferrule and thus could be valuable alternatives for premolar CRR. Further studies are necessary to evaluate the clinical success of these CRR.

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