Effects of Sodium Hypochlorite Gel and Sodium Hypochlorite Solution on Dentin Bond Strength

摘要

The aim of this study was to determine the effect of 10 percent NaOCl gel and 10 percent NaOCl solution on dentin bond strengths of four adhesive systems. One hundred eighty bovine incisors were ground to achieve a flat polished surface, then divided into 12 groups: Giuma One Bond [G1 - control; G2 - NaOCl solution; G3 - NaOCl gel]; Prime & Bond 2.1 [G4 - control; G5 - NaOCI solution; G6 - NaOCI gel]; Single Bond [G7 - control; G8 - NaOCl solution; G9 - NaOCl gel]; Prime & Bond NT [G10 - control; Gil - NaOCl solution; G12 -NaOCl gel], Dentin was etched, rinsed, and blot dried. For the experimental groups, after acid etching, 10 percent NaOCl solution or 10 percent NaOC gel was applied for 60 s, rinsed, and blot dried. Composite resin was inserted and light cured. Shear bond strengths were tested with a crosshead speed of O.Smm/min. The mean values MPa (SD) were analyzed with two-way ANOVA and Tukey's tests (a < 0.01). Ten percent NaOCl solution significantly increased Giuma One Bond strength. No effect was observed for the other adhesives. The 10 percent NaOCI gel did not affect bond strengths. Ten percent NaOCl gel was less effective on collagen removal as compared to 10 percent NaOCl solution. The influence of collagen removal on bond strength is dependent on adhesive system, where both the solvent and the monomer can influence the results.