Dentin Bonding Agents I: Complete Classification—A Review <s> Intermediate Strong Self-etch Adhesives <s> Abstract Objectives To evaluate dentin wettability and bonding of self-etching and total-etch adhesives on smear layer-covered and smear layer-free dentin. Methods Three self-etching adhesives (Clearfil SE Bond, AdheSE and Xeno III) and one total-etch adhesive (SingleBond) were evaluated. The substrates were mid coronal smear layer-covered and smear layer-free dentin. Dentin wettability by resins was studied from contact angle measurement using sessile drop method and Axisymmetric Drop Shape Analysis (ADSA). Shear-bond strength was evaluated using a push-out technique (ad hoc design). Data were analysed with two-way ANOVA and Tukey's test. Results Similar values of dentin wettability were obtained for all adhesives tested regardless the presence of smear layer. Even though, Xeno III and AdheSE exhibited slightly lower wettability (higher contact angles values) on smear layer-free dentin. Likewise, the presence of smear layer did not affect the shear-bond strength. Total-etch adhesive obtained higher shear-bond strength than self-etching adhesives, which obtained similar values. Significance Wettability is similar between self-etching and total-etch adhesives. The smear layer affects slightly the wettability of self-etching adhesives. Shear-bond strength is not sensitive to the smear layer presence. Total-etch adhesion is stronger than self-etching adhesion. There is no clear relationship between wettability and bond strength. <s> BIB001 </s> Dentin Bonding Agents I: Complete Classification—A Review <s> Intermediate Strong Self-etch Adhesives <s> Aim: The purpose of this paper is to review the literature on the clinical effectiveness of contemporary resin-based dentin bonding agents primarily focussing on the longevity of restoration. Materials and Methods: The literature published from June 2004 up to September 2010 was reviewed for clinical trials that tested the effectiveness of dentin bonding agents in the longevity of noncarious class V restoration. Results of each study reported using the USPHS criteria for clinical assessment of restoration were included and tabulated. The American Dental Association guidelines for dentin and enamel adhesives were used as a reference to compare the performance of individual bonding agents. Kruskal-Wallis followed by Mann-Whitney U was done to compare the mean Alfa score percentage for the three categories of bonding systems [etch-and-rinse (ER), self-etch primer (SEP), and self-etch-adhesive (SEA)]. Results: A comparison of the mean Alfa score percentages revealed no difference between the ER, SEP, and SEA categories of bonding systems except for marginal adaptation where ER was found to be superior to SEA. Conclusion: The clinical effectiveness of resin-based bonding agents is comparable among the three categories. <s> BIB002
Have pH of about 1.5. They may be (i) two step, e.g. OptiBond Solo Plus; (ii) single step, e.g. Xeno IV (Dentsply Cault), iBond (Heraeus Kulzer), G-Bond (GC America). A comparison of the mean alpha score percentages revealed no difference between the etch-and-rinse, self-etch primer and self-etch-adhesive categories of bonding systems except for marginal adaptation where etch-and-rinse was found to be superior to SEA.  BIB002 Self-etching primers incorporate a significant amount of water as a solvent in order to promote the ionization of the acidic monomers. After solvent evaporation, the adhesive layer can be very thin and therefore the mechanical properties may be low. In addition, a demineralized dentin zone has been found below the hybrid layer formed by self-etching primers, which is not fully protected by the adhesive and this could jeopardize bond strength. BIB001 The increase in bond strength obtained by increasing the number of consecutive coating of adhesives (up to three coats of total-etch and two coats of self-etch) suggests that this technique might be useful in all total-etch and self-etch systems.