Numerical analysis of the biomechanical behaviour of a weakened root after adhesive reconstruction and post-core rehabilitation

Journal of Dentistry
C M A MattosS M G Guerra

Abstract

The purpose of this study was to perform a finite element analysis to determine whether adhesive reconstruction is able to restore the original biomechanical behaviour of weakened roots, in terms of fracture resistance, when compared with post/crown-restored teeth with intact roots. A three-dimensional model of a maxillary central incisor was created. The model simulated an endodontically treated tooth restored with a glass-fibre post, a composite-resin core and a metal crown (Model 1). Based on Model 1, a new volume was created in the root cervical third that represented the area where the dentine structure was lost, resulting in a structurally damaged root (Model 2). A 100N load was applied to the palatal surface at 130° from the long axis of the tooth. After processing (Ansys(®) 10.0 - Canonsburg, PA, USA), the principal normal stress data were analyzed (S1, tensile; S3, compressive). The models demonstrated a similar S1 distribution concentrated in the lingual cervical region but different S1 levels (Model 1: 28.7MPa; Model 2: 35.3MPa). The S3 distribution indicated differences in behaviour between the models (Model 1: -18 to -27MPa along the buccal root surface; Model 2: -25 to -32MPa on the post buccal surface and along t...Continue Reading

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Citations

Mar 11, 2016·Brazilian Dental Journal·Marina AmaralSelva Maria Gonçalves Guerra
Feb 6, 2014·Journal of Prosthodontics : Official Journal of the American College of Prosthodontists·Rania A AminOssama Saleh Abd El-Ghany
Apr 13, 2020·Journal of Materials Science. Materials in Medicine·Aline Batista Gonçalves FrancoAlexandre Sigrist de Martim

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