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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Effect of partially demineralized dentin beneath the hybrid layer on dentin-adhesive interface micromechanics

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Author(s):
Anchieta, Rodolfo Bruniera [1, 2] ; Machado, Lucas Silveira [2, 3] ; Sundfeld, Renato Herman [3] ; Reis, Andre Figueiredo [4] ; Giannini, Marcelo [5] ; Luersen, Marco Antonio [6] ; Janal, Malvin [7] ; Rocha, Eduardo Passos [1] ; Coelho, Paulo G. [2]
Total Authors: 9
Affiliation:
[1] Sao Paulo State Univ, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, Aracatuba, SP - Brazil
[2] NYU, Coll Dent, Epidemiol & Hlth Promot, New York, NY - USA
[3] Sao Paulo State Univ, Aracatuba Dent Sch, Dept Restorat Dent, Aracatuba, SP - Brazil
[4] Univ Guarulhos, Sch Dent, Dept Operat Dent, Guarulhos, SP - Brazil
[5] Univ Estadual Campinas, Piracicaba Dent Sch, Dept Restorat Dent, Piracicaba, SP - Brazil
[6] Univ Tecnol Fed Parana, Curitiba, Parana - Brazil
[7] NYU, Coll Dent, Dept Biomat & Biomimet, New York, NY - USA
Total Affiliations: 7
Document type: Journal article
Source: JOURNAL OF BIOMECHANICS; v. 48, n. 4, p. 701-707, FEB 26 2015.
Web of Science Citations: 7
Abstract

Objective: To investigate the presence of non-infiltrated, partially demineralized dentin (PDD) beneath the hybrid layer for self-etch adhesive systems, and its effect on micromechanical behavior of dentin-adhesive interfaces (DAIs). This in-vitro laboratory and computer simulation study hypothesized that the presence of non-infiltrated PDD beneath the hybrid layer does not influence the mechanical behavior of the DAI of self-etch adhesive systems. Methods: Fifteen sound third molars were restored with composite resin using three adhesive systems: Scotchbond Multipurpose (SBMP), Clearfil SE Bond (CSEB) and Adper Promp L-Pop (APLP). The thickness and length of all DAIs were assessed using scanning electron microscopy, and used to generate three-dimensional finite element models. Elastic moduli of the hybrid layer, adhesive layer, intertubular dentin, peritubular dentin and resin tags were acquired using a nano-indenter. Finite element software was used to determine the maximum principal stress. Mixed models analysis of variance was used to verify statistical differences (P < 0.05). Results: Elastic moduli and morphology were found to differ between the adhesive systems, as well as the presence and extension of PDD. Significance: Both self-etch adhesive systems (APLP and CSEB) had PDD. The DAI stress levels were higher for the one-step self-etch adhesive system (APLP) compared with the etch-and-rinse adhesive system (SBMP) and the self-etch primer system (CSEB). (C) 2014 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/07012-1 - Nanomechanical properties and micromechanical evaluation of dentin/adhesive interface after hydrolytic degradation: a nanoindentation and tridimensional finite element analyses
Grantee:Rodolfo Bruniera Anchieta
Support Opportunities: Scholarships abroad - Research Internship - Doctorate
FAPESP's process: 10/12926-7 - Nanomechanical properties and micromechanical evaluation of dentin/adhesive interface after hydrolytic degradation: nanoidentation and tridimensional finite element analyses
Grantee:Rodolfo Bruniera Anchieta
Support Opportunities: Scholarships in Brazil - Doctorate