| Influence of different post design and composition on stress distribution in maxillary central incisor: Finite element analysis. | |
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MedLine Citation:
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PMID: 19553714 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Post design and material has very important effects on dentinal stress distribution since the post placement can create stresses that lead to root fracture. MATERIALS AND METHODS: In this study we use finite element analysis (FEA) to evaluate stress distribution on endodontically treated maxillary central incisors that have been restored with different prefabricated posts. Six models were generated from the image of anatomical plate: Four metallic posts (ParaPost XH, ParaPost XT, ParaPost XP, and Flexi-Flange) and one fiberglass post (ParaPost Fiber Lux). The sixth model was a control-a sound maxillary central incisor. We used CAD software and exported the models to ANSYS 9.0. All the materials and structures were considered elastic, isotropic, homogeneous, and linear except the fiberglass post which was considered orthotropic. The values for the mechanical properties were obtained by a review of the literature and the model was meshed with 8-node tetrahedral elements. A load of 2N was applied to the lingual surface at an angle of 135 degrees. RESULTS: The stress results were recorded by shear stress and von Mises criteria; it was observed that there was no difference for stress distribution among the titanium posts in the radicular portions and into posts. There was higher stress concentration on the coronary portion with the titanium posts than with the glass fiber post. It seems that the metallic posts' external configuration does not influence the stress distribution. CONCLUSION: Fiber posts show more homogeneous stress distribution than metallic posts. The post material seems to be more relevant for the stress distribution in endodontically treated teeth than the posts' external configuration. |
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Authors:
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Natércia R Silva; Carolina G Castro; Paulo C F Santos-Filho; Gisele R Silva; Roberto E Campos; Paulo Vinicins Soares; Carlos José Soares |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Indian journal of dental research : official publication of Indian Society for Dental Research Volume: 20 ISSN: 1998-3603 ISO Abbreviation: Indian J Dent Res Publication Date: 2009 Apr-Jun |
Date Detail:
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Created Date: 2009-06-25 Completed Date: 2009-09-29 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9202990 Medline TA: Indian J Dent Res Country: India |
Other Details:
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Languages: eng Pagination: 153-8 Citation Subset: D |
Affiliation:
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Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlandia, Uberlandia, Minas Gerais, Brazil. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Aluminum Silicates
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chemistry Biomechanics Composite Resins / chemistry Computer Simulation Computer-Aided Design Crowns Dental Materials / chemistry Dental Porcelain / chemistry Dental Prosthesis Design* Dentin / physiopathology Elasticity Finite Element Analysis* Glass / chemistry Humans Incisor / physiopathology* Materials Testing Maxilla / physiopathology* Models, Biological Post and Core Technique / instrumentation* Potassium Compounds / chemistry Software Stress, Mechanical Titanium / chemistry Tooth Root / physiopathology Tooth, Nonvital / physiopathology |
| Chemical | |
Reg. No./Substance:
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0/Aluminum Silicates; 0/Composite Resins; 0/Dental Materials; 0/Filtek Z250; 0/Potassium Compounds; 0/fiberglass; 12001-21-7/Dental Porcelain; 12168-80-8/feldspar; 7440-32-6/Titanium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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