Effects of cleaning agents on bond strength to dentin

Abstract

The cleaning of cavity walls aims to improve adhesive restorative procedures and longevity of restorations. This study has compared the effect of three cleaning agents--sodium bicarbonate jet (Profi II, Dabi Atlante, São Paulo, Brazil); pumice paste plus a biologic detergent (Tergestesim, Probem, São Paulo, Brazil); air water spray--on the bond strength between dentin and two different adhesive systems: Clearfil SE Bond (Kuraray, Kioto, Japan) and Scotchbond Multi-Purpose Plus (3M-ESPE, São Paulo, Brazil). Six groups (n: 10) of dental fragments obtained from young adult extracted teeth were prepared, and each one received one of the listed surface cleaning techniques. After the adhesive application, a cone-shaped test body was built with AP-X (Kuraray, Kioto, Japan) or Z100 (3M-ESPE, São Paulo, Brazil) composite resins, using a Teflon matrix. The specimens were tested for tensile bond strength after one-week storage in distilled water at 37 degrees C. Two pairs of fractured specimens of each group were randomly chosen and processed for scanning electron microscopy (SEM) analysis. ANOVA test of the bond strength values showed no statistical differences among the cleaning agents and neither between their interactions with the bonding systems. Upon SEM analysis, most surfaces showed mixed fractures of adhesive and cohesive failures in bonding resin to dentin. Based on statistical and SEM analysis, it was concluded that the cleaning agents studied did not interfere with the bond strength of the adhesive systems used to dentin.

Effect of temporary cement removal methods from human dentin on zirconia-dentin adhesion

“…In addition, varying the application parameters of such agents can alter the results of the bond strength between the dentin/cement/zirconia interfaces [7]. Studies comparing the bond strength between dentin and resin cements after the use of different methods for temporary cement removal have presented diverse results 7,8,12]. The use of air-particle-abrasion with Al2O3, pumice paste and 0.12% chlorhexidine before acid etching did not significantly affect dentin bond strength, unlike the use of hydrogen peroxide and sodium bicarbonate jet, which significantly decreased the bonding [8].…”

Influence of Protease Inhibitors on Bond Degradation of Self-Etch Adhesive Systems to Caries-Affected Dentin: An <i>in Vitro</i> Study

“…Possible explanations for this phenomenon include a negative interaction of these two solutions when mixed together, or excessive moisture on the dentin surface caused by consecutive application of the two solutions. The hydrophobic monomer of Clearfil SE Bond adhesive is rendered unable to diffuse into the substrate; instead, globules form in the aqueous environment, preventing infiltration of the bonding agent and its adherence to the caries-affected dentin [44]. After 6 months, bond strength was diminished in all groups.…”

“…This may be explained by the lack of any immediate interference of sodium bicarbonate with the effects of the functional acid monomer or with the organic acids present in the primer. Another hypothesis is incorporation of sodium bicarbonate particles into the hybrid layer and smear layer [44]. However, the combination of 2% sodium bicarbonate and 2% chlorhexidine led to an immediate reduction in microtensile bond strength.…”

Changes on the color parameters of air‐abraded resin composite exposed to different colored beverages

“…Professional cleaning or oral prophylaxis is commonly used in dentistry to provide adequate tooth cleaning and to remove dental biofilm and extrinsic stains. Agents for prophylaxis include pumice paste, abrasive dentifrices, air‐powder abrasion with sodium bicarbonate, and air abrasion with aluminum oxide particles 1–3 …”

“…Agents for prophylaxis include pumice paste, abrasive dentifrices, air-powder abrasion with sodium bicarbonate, and air abrasion with aluminum oxide particles. [1][2][3] Although a previous study 2 showed that sodium bicarbonate particles are less abrasive than the other agents, some studies have demonstrated that air-powder procedures provide significant superficial alterations on composite restorations, like losing polishing because of resin matrix wear. 1,3,4 Therefore, air-powder abrasion with sodium bicarbonate might act not only by removing stains, but also increasing the surface roughness of restorative materials.…”