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      A finite element analysis for a comparative evaluation of stress with two commonly used esthetic posts

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          Abstract

          Objectives:

          The objective of this study was to evaluate stress distribution in the dentin and alveolar bone created by load application on simulated endodontically treated teeth with two different esthetic posts.

          Materials and Methods:

          A finite element model was made and elastic moduli and poissons ratio of all the materials fed to the software. For both the models, a 100N force was applied on the lingual surface of the tooth at an angle of 45°. Stress concentration and distribution were evaluated and noted down for both the posts.

          Results:

          Finite element method revealed that Glass fibre post had homogenous distribution of stress whereas in zirconia post the stress was concentrated in the post.

          Conclusion:

          The present findings suggest that glass fibre post should be used in well-conserved radicular tooth structure and Zirconia post is indicated in weakened and grossly destructed tooth structure.

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          Fibre-based post systems: a review.

          Chelsea D. Ricketts, Ken Bateman, Ian Saunders (2003)
          This article presents a review of published literature examining fibre-based endodontic post systems. A MEDLINE search was carried out for any articles in dental journals pertaining to fibre-based post systems. Wherever possible articles cited were obtained from the journals and where this was not possible abstracts were obtained. Where no abstract was available the article was not considered for evaluation. Articles were reviewed by a single observer and subject to meeting inclusion criteria were included in the review. Fifty-nine articles were considered suitable for inclusion. Articles were divided into categories and a subjective description of the articles was made. Review indicated that (1) most published literature on fibre-based posts took the form of laboratory analyses; (2) evidence for carbon-fibre posts far exceeds that for quartz-fibre posts; (3) laboratory evidence was contradictory and could not be used to inform practice reliably; (4) few clinical studies have been carried out though these have suggested fibre based posts may be clinically appropriate for restoration of the endodontically treated tooth; and (5) controlled prospective clinical trials evaluating fibre-based posts should be undertaken to inform use for clinical practice.
          Article 0 comments Cited 33 times – based on 0 reviews     Review now
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            Restoration of the endodontically treated tooth.

            Robert J Robbins (2002)
            It has been the purpose of this article to provide a rationale for the restoration of endodontically treated teeth. Treatment recommendations have been made in the areas of post design, placement technique, cements, core materials, and definitive restorations, based on a review of the clinical and laboratory data.
            Article 0 comments Cited 24 times – based on 0 reviews     Review now
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              Stress distribution in a post-restored tooth using the three-dimensional finite element method.

              S Guidotti, L Boschian Pest, M Gagliani … (2006)
              Clinicians are opting ever more frequently for restorative materials which have an elastic modulus similar to that of dentin when reconstructing endodontically treated teeth. Metallic posts, which are capable of causing dangerous and non-homogenous stresses in root dentin, are slowly being abandoned. Ideal posts may be those made of various types of fibre (carbon, mineral and glass) and which are adhesively luted into the canal. Among the different methods for evaluating the mechanical behaviour of posts in root canals (progressive loads and photo-elastic technique) the finite element method (FEM) presents many advantages. The aim of this paper is to evaluate, utilizing three-dimensional analysis of the finite elements, what the effect of material rigidity, depth of insertion and post diameter could be on the stress distribution in the different components of the single tooth-post-core reconstruction unit. The results of the FEM analyses, expressed as the distribution of Von Mises stress values, has allowed us to conclude that (i) fibreglass-reinforced composite distributes stress better than titanium alloy or stainless steel; (ii) fibreglass-reinforced composite posts should be inserted as deeply as possible (but maintaining 5-6 mm of gutta-percha apical seal); (iii) fibreglass-reinforced composite post diameter does not affect stress distribution, therefore, as much radicular dentin as possible should be preserved.
              Article 0 comments Cited 19 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (nlm-ta): Eur J Dent
                Journal ID (iso-abbrev): Eur J Dent
                Journal ID (publisher-id): EJD
                Title: European Journal of Dentistry
                Publisher: Medknow Publications & Media Pvt Ltd (India )
                ISSN (Print): 1305-7456
                ISSN (Electronic): 1305-7464
                Publication date (Print): Oct-Dec 2013
                Volume: 7
                Issue: 4
                Pages: 419-422
                Affiliations
                [1 ]Department of Prosthodontics, SDM College of Dental Sciences and Hospital, Dharwad, Karnataka, India
                Author notes
                Correspondence: Dr. Prajna P. Shetty Email: Prajna.shetty21@ 123456gmail.com
                Article
                Publisher ID: EJD-7-419
                DOI: 10.4103/1305-7456.120668
                PMC ID: 4053665
                PubMed ID: 24932115
                SO-VID: 622cf06e-6385-4bd1-9071-7bfb529bc6f8
                Copyright © Copyright: © European Journal of Dentistry
                License:

                This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Categories
                Subject: Original Article

                ScienceOpen disciplines: Dentistry
                Keywords: esthetic post,finite element analysis,glass fiber post,stress analysis,stress distribution,zirconia post
                Data availability:
                ScienceOpen disciplines: Dentistry
                Keywords: esthetic post, finite element analysis, glass fiber post, stress analysis, stress distribution, zirconia post

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