Dentin bonding performance using Weibull statistics and evaluation of acid-base resistant zone formation of recently introduced adhesives

Abstract

Dentin bonding durability of recently introduced dental adhesives: Clearfil SE Bond 2 (SE2), Optibond XTR (XTR), and Scotchbond Universal (SBU) was investigated using Weibull analysis as well as analysis of the micromorphological features of the acid-base resistant zone (ABRZ) created for the adhesives. The bonding procedures of SBU were divided into three subgroups: self-etch (SBS), phosphoric acid (PA) etching on moist (SBM) or dry dentin (SBD). All groups were thermocycled for 0, 5,000 and 10,000 cycles followed by microtensile bond strength testing. Acid-base challenge was undertaken before SEM and TEM observations of the adhesive interface. The etch-and-rinse method with SBU (SBM and SBD) created inferior interfaces on the dentin surface which resulted in reduced bond durability. ABRZ formation was detected with the self-etch adhesive systems; SE2, XTR and SBS. In the PA etching protocols of SBM and SBD, a thick hybrid layer but no ABRZ was detected, which might affect dentin bond durability.

Exposed Dentin: Influence of Cleaning Procedures and Simulated Pulpal Pressure on Bond Strength of a Universal Adhesive System

“…also more than use in “total-etch” mode, may reflect a certain superiority of this adhesive interface, e.g. resulting increased stability of the self-etch bond compared to the total-etch bond as have been reported in previous studies [25,26]. Evidently, an adhesive treatment must not only be able to provide effective, immediate bonding, but this effective bonding must also be durable.…”

Enhancement of dentin bond strength of resin cement using new resin coating materials

“…10-MDP plays several important roles to dissolve the smear layer, promote monomer penetration and chemically bond to hydroxyapatite 18) . SE2 contributes to the high quality of the hybrid layer and acid-base resistant zone at resindentin interface 19) .…”

Effect of fluoride mouthrinse on adhesion to bovine root dentin

“…It was suggested that saliva proteins could be employed to control mineral recovery of the lesion body 25) . Clearfil SE Bond is a two-step self-etch adhesive system containing MDP, which is as a functional monomer and has several important roles such as etching of tooth substrates, enhancing monomer penetration, and imparting the adhesives with potential for chemical interactions 22,[31][32][33][34] . It was reported that the chemical bonding potential of hydroxyapatite to Ca varied with the types of functional monomers used [34][35][36] .…”