Comparison between universal adhesives and two‐step self‐etch adhesives in terms of dentin bond fatigue durability in self‐etch mode

Abstract

This aim of this study was to compare universal adhesives and two-step self-etch adhesives in terms of dentin bond fatigue durability in self-etch mode. Three universal adhesives - Clearfil Universal, G-Premio Bond, and Scotchbond Universal Adhesive - and three-two-step self-etch adhesives - Clearfil SE Bond, Clearfil SE Bond 2, and OptiBond XTR - were used. The initial shear bond strength and shear fatigue strength of resin composite bonded to adhesive on dentin in self-etch mode were determined. Scanning electron microscopy observations of fracture surfaces after bond strength tests were also made. The initial shear bond strength of universal adhesives was material dependent, unlike that of two-step self-etch adhesives. The shear fatigue strength of Scotchbond Universal Adhesive was not significantly different from that of two-step self-etch adhesives, unlike the other universal adhesives. The shear fatigue strength of universal adhesives differed depending on the type of adhesive, unlike those of two-step self-etch adhesives. The results of this study encourage the continued use of two-step self-etch adhesive over some universal adhesives but suggest that changes to the composition of universal adhesives may lead to a dentin bond fatigue durability similar to that of two-step self-etch adhesives.

Influence of surface wetness on bonding effectiveness of universal adhesives in etch‐and‐rinse mode

“…Subsequently, the specimens were stored in 37°C distilled water for 24 h prior to testing. The fatigue load was applied on the stainless‐steel molds using a sine wave at a frequency of 20 Hz for 50,000 cycles or until failure occurred, following the standard methodology for this test . The initial peak load for bond fatigue‐strength testing for each of the adhesives was set at a level of approximately half of the initial bond strength for each group.…”

“…Other manufacturers later released similar universal adhesives with various distinctive characteristics, such as use with resin luting cement , use with various substrates , or shortened application times . It has also been reported that the bond durability of most universal adhesives to enamel in etch‐and‐rinse and self‐etch modes and to dentin in self‐etch mode is lower than that of two‐step self‐etch adhesives. Nevertheless, the clinical use of universal adhesives is increasing rapidly because of their versatility.…”

Comparison of enamel bond fatigue durability between universal adhesives and two-step self-etch adhesives: Effect of phosphoric acid pre-etching

“…Over the past decade, a dynamic bond strength testing that assess the bond fatigue strength of adhesive systems have been developed at the Creighton University School of Dentistry (Omaha, NE, USA) [28][29][30] . A method for dynamic bond strength testing was originally developed by Erickson et al 31,32) 33) , Barkmeier et al 34) , Takamizawa et al 35) , and Tsujimoto et al 36) at the Creighton University School of Dentistry from 2009 to 2017.…”

Can Nonthermal Plasma Improve the Adhesion between Acrylic Resin for Ocular Prostheses and Silicone‐Based Relining Material?

“…34 The visualization of the type of failure of the tensile bond strength test was performed by a single operator by means of a microscope at 32×, and the failure was classified as cohesive, adhesive, or mixed. 29,33,35 One additional specimen from each group was used for the surface characterization of the different treatment types by means of scanning electron microscopy (SEM) (JSM 6010LA; JEOL, Tokyo, Japan). The images were registered at 300×, 2000×, and 10,000× magnifications for qualitative verification of the surface treatment.…”