The effect of dentin pretreatment on the microtensile bond strength of self-adhesive resin cements

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-a...

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Bibliographic Details
Published in:The Journal of prosthetic dentistry 2010-10, Vol.104 (4), p.258-264
Main Authors: Pavan, Sabrina, DDS, MS, PhD, dos Santos, Paulo H., DDS, MS, PhD, Berger, Sandrine, DDS, MsC, Bedran-Russo, Ana Karina B., DDS, MS, PhD
Format: Article
Language:English
Subjects:
Acrylic Resins - pharmacology
Adhesive bonding
Adhesive strength
Analysis of Variance
Bonding strength
Cements
Composite Resins - chemistry
Composite Resins - pharmacology
Dental Bonding - methods
Dental Etching - methods
Dental Stress Analysis
Dentin
Dentin - drug effects
Dentin-Bonding Agents - chemistry
Dentin-Bonding Agents - pharmacology
Dentistry
Etching
Glass Ionomer Cements - chemistry
Glass Ionomer Cements - pharmacology
Humans
Polymers
Prosthetics
Resin Cements - chemistry
Resin Cements - pharmacology
Resins
Statistics, Nonparametric
Tannins - pharmacology
Tensile Strength - drug effects
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Summary: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 mm2 ), 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 (α=.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
ISSN:0022-3913
1097-6841
DOI:10.1016/S0022-3913(10)60134-5