Journal article
Effect of pH and application times of a meta-phosphoric acid on resin-dentin bonding properties
International journal of adhesion and adhesives, Vol.74, pp.107-114
04/2017
DOI: 10.1016/j.ijadhadh.2016.10.014
Abstract
To evaluate the effect of different pHs of 40% meta phosphoric acid (MPA) in comparison with a conventional 37% ortho-phosphoric acid under different application times in terms of resin-dentin bond strength (μTBS), nanoleakage (NL) and the dentin-etching pattern.
Ninety-six molars were randomly assigned into 12 experimental conditions according to the combination of the independent variables: Acid [37% ortho-phosphoric acid (OPA), 40% meta-phosphoric acid (MPA) in the following pHs – 0.5, 1 and 2] and Application Time [7, 15 and 30s]. After restorations, specimens were sectioned into resin–dentine beams (0.8mm2) tested under tension (0.5mm/min). Selected beams from each tooth were used for NL evaluation. The dentin-etching pattern of the OPA and MPA was examined under a scanning electron microscop. Acid vs application time data were subjected to two-way ANOVA and Tukey's test (α=0.05)
MPA pH 0.5 showed μTBS means similar to OPA, independently the application time (p>0.05). A statistically higher NL was observed for OPA in comparison with MPA, regardless the application time (p<0.03). When MPA pH 0.5 was applied at the different times, the demineralised substrate showed presence of minerals along dentin surface.
The use of 40% meta-phosphoric acid with pH 0.5 is an alternative acid-etching agent with similar immediate bond strength and lower nanoleakage than the traditional 37% ortho-phosphoric acid.
Details
- Title: Subtitle
- Effect of pH and application times of a meta-phosphoric acid on resin-dentin bonding properties
- Creators
- Andres Felipe Millan Cardenas - Universidade Estadual de Ponta GrossaFabiana Suelen Figueredo de Siqueira - Universidade Estadual de Ponta GrossaMatheus Coelho Bandeca - Centro Universitário do MaranhãoVictor Pinheiro Feitosa - Universidade Federal do CearáAlessandra Reis - Universidade Estadual de Ponta GrossaAlessandro D. Loguercio - Universidade Estadual de Ponta GrossaJoão Carlos Gomes - Universidade Estadual de Ponta Grossa
- Resource Type
- Journal article
- Publication Details
- International journal of adhesion and adhesives, Vol.74, pp.107-114
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.ijadhadh.2016.10.014
- ISSN
- 0143-7496
- eISSN
- 1879-0127
- Language
- English
- Date published
- 04/2017
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984655348202771
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