Indian Journal of Dental Research

ORIGINAL RESEARCH
Year
: 2009  |  Volume : 20  |  Issue : 2  |  Page : 153--158

Influence of different post design and composition on stress distribution in maxillary central incisor: Finite element analysis


Natercia R Silva, Carolina G Castro, Paulo CF Santos-Filho, Gisele R Silva, Roberto E Campos, Paulo Vinicins Soares, Carlos Jose Soares 
 Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlandia, Uberlandia, Minas Gerais, Brazil

Correspondence Address:
Carlos Jose Soares
Department of Operative Dentistry and Dental Materials, School of Dentistry, Federal University of Uberlandia, Uberlandia, Minas Gerais
Brazil

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°. 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«SQ» 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«SQ» external configuration.


How to cite this article:
Silva NR, Castro CG, Santos-Filho PC, Silva GR, Campos RE, Soares PV, Soares CJ. Influence of different post design and composition on stress distribution in maxillary central incisor: Finite element analysis.Indian J Dent Res 2009;20:153-158


How to cite this URL:
Silva NR, Castro CG, Santos-Filho PC, Silva GR, Campos RE, Soares PV, Soares CJ. Influence of different post design and composition on stress distribution in maxillary central incisor: Finite element analysis. Indian J Dent Res [serial online] 2009 [cited 2014 Apr 23 ];20:153-158
Available from: http://www.ijdr.in/article.asp?issn=0970-9290;year=2009;volume=20;issue=2;spage=153;epage=158;aulast=Silva;type=0