A utilização do ácido fítico como agente condicionante de dentina

Abstract

Phytic acid (AF) is an organic acid found in cereals and plant seeds, widely used as an antioxidant and depigmenting agent. The objective was to evaluate the use of PA in different concentrations as a dentin conditioning agent in the adhesive procedure. The independent variables of the study were: phosphoric acid 37% (AF37), AF 1% (F1), AF 2% (F2), AF 3% (F3) as dentin conditioning agents, prior to the application of a conventional adhesive of two steps. Dentin flat surfaces were treated with conditioning agents - AF37 for 15 s and AFs for 60 s -, and after an active application of the adhesive system and its photoactivation, a resin plateau composed by the incremental technique was made. Then, specimens were obtained in the form of sticks, with 1mm² cross section. Microtensile tests [n = 5] (μTBS) were carried out by means of a universal mechanical testing machine and nanofiltration [n = 3] using a scanning electron microscope. the analyzes were quantitative and qualitative, respectively. For the statistical analysis of μTBS the data were submitted to the Shapiro-Wilk normality test followed by analysis of variance (ANOVA) and Tukey's post-test (p <0.05). A statistically significant difference was observed between the groups with AF at different concentrations and the AF37, with F2 and F3 showing no significant differences between them (p> 0.05). In relation to nanoinfiltration, it is possible to observe little presence of silver in the union interface treated with AF. It is concluded that FA may be a potential conditioning agent in place of AF37. However more experiments are needed to evaluate the effect of FA on the bond strength in the long term, mechanical properties of the conditioned dentin and its effect on the pulp cells.