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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.)

THE EFFECT OF DENTIN PRETREATMENT ON THE MICROTENSILE BOND STRENGTH OF SELF-ADHESIVE RESIN CEMENTS

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Author(s):
Pavan, Sabrina [1] ; dos Santos, Paulo H. [2] ; Berger, Sandrine [3] ; Bedran-Russo, Ana Karina B. [1]
Total Authors: 4
Affiliation:
[1] Univ Illinois, Coll Dent, Dept Restorat Dent, Chicago, IL - USA
[2] Univ Estadual Paulista, Dept Dent Mat & Prosthodont, Aracatuba Sch Dent, Sao Paulo - Brazil
[3] Univ Estadual Campinas, Dept Restorat Dent, Dent Sch Piracicaba, Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF PROSTHETIC DENTISTRY; v. 104, n. 4, p. 258-264, OCT 2010.
Web of Science Citations: 30
Abstract

Statement of problem. Self-adhesive cements have lower bond strength than conventional resin cements that rely on the application of etch-and-rinse adhesive systems. Purpose. The purpose of this study was to evaluate the effect of tannic and polyacrylic acid on the microtensile bond strength of self-adhesive resin cements to dentin. Material and methods. Eighteen molar crowns were flattened to expose dentin and divided into 3 groups according to the dentin pretreatment: (1) control, without surface treatment; (2) 25% polyacrylic acid solution (Ketac Conditioner); (3) 20% tannic acid. Composite resin (Tescera) blocks were luted to dentin surfaces using 2 self-adhesive resin cements (RelyX Unicem or Maxcem Elite) (n=3). All specimens were stored in distilled water for 24 hours, sectioned into beams (1 mm(2)), and tested to failure using a microtensile method at a crosshead speed of 1 mm/min. The data were statistically analyzed using 2-way ANOVA and Fisher's PLSD tests (alpha=.05). Results. The polyacrylic acid significantly improved the microtensile bond strength of RelyX Unicem (14.92 +/- 4.94 MPa) when compared to the control group (8.35 +/- 1.99 MPa) and tannic acid treatment (8.38 +/- 2.67 MPa) (P<.001). Dentin surface treatment did not affect the microtensile bond strength of Maxcem Elite cemented groups (control, 8.45 +/- 3.21 MPa; polyacrylic acid, 9.53 +/- 9.95 MPa; tannic acid, 6.89 +/- 4.45 MPa). Conclusions. Dentin pretreatment with polyacrylic acid improved the microtensile bond strength of RelyX Unicem. (J Prosthet Dent 2010; 104:258-264) (AU)

FAPESP's process: 08/03213-7 - Effect of colagen cross-linkers in the adhesive interfaces: evaluation of mechanical nanoproperties
Grantee:Paulo Henrique dos Santos
Support Opportunities: Scholarships abroad - New Frontiers