Bond Strength of Total-Etch Dentin Adhesive Systems on Peripheral and Central Dentinal Tissue: A Microtensile Bond Strength Test

Abstract

Objective The purpose of this study was to evaluate the microtensile bond strength (μ TBS) of four total-etch adhesives [Excite (EB), Prime & Bond NT (PBNT), Single Bond (SB), and One Coat Bond (OCB)] by comparing them to five self-etching adhesives (Clearfil SE Bond (CSEB), Xeno III (X III), Prompt L-Pop (PLP), AQ Bond (AQB), and Tyrian/One Step plus (TOSP)] at different dentinal areas. In addition the interface between the adhesive resins and dentin was examined using scanning electron microscopy (SEM). Methods and Materials Superficial occlusal dentin of extracted human molars was exposed and finished with wet 800-grit silicon carbide paper. A block of composite resin was then bonded to the molar samples with the above adhesives according to the manufacturers’ instructions. After 24 hours in water at 37°C, the specimens were sectioned into 1 mm thick slices and divided into two regional subgroups according to their relationship to pulp tissue using visual criteria: pulp center and pulp periphery. The slices were then trimmed for the microtensile bond test and subjected to a tensile force and crosshead speed of 1 mm/min. Two-way analysis of variance was performed for statistical analyses. In addition the bond strengths for nine adhesive systems for each dentinal area were compared using the Post-Hoc test. The resin-dentin interfaces for each adhesive system were observed under a SEM. Results Mean μ TBS ranged from (25.2 MPa) for TOSP to (48.9 MPa) for PBNT. The bond strengths of total-etch adhesive systems were not significantly different, and were higher than self-etch adhesive systems, except for CSEB (p<0.05). No significant regional difference was observed for all of the nine adhesive systems (p>0.05). SEM observation showed there is not a standard hybridization for adhesive systems. Conclusion Different dentinal areas may not exhibit as great an influence on bond strengths using new adhesive systems. Citation Yeşilyurt C, Bulucu B. Bond Strength of Total-Etch and Self-Etch Dentin Adhesive Systems on Peripheral and Central Dentinal Tissue: A Microtensile Bond Strength Test. J Contemp Dent Pract 2006 May;(7)2:026-036.

Microtensile bond strength of etch and rinse versus self-etch adhesive systems

“…Modern adhesive systems can be grouped according to their etching technique into two categories: total-etch (etch and rinse) and self-etch products (Yesilyurt and Bulucu, 2006). The first category utilizes the total-etch technique, which relies on the removal of the smear layer and exposure of the collagen matrix by acid etching, followed by the application of a self-priming agent that combines the primer and the adhesive resin into one solution (Proença et al, 2007).…”

“…Hotta et al (1998) demonstrated that bonding agent polymerization is beneficial for strong adhesion between the tooth substance and restorative resins. Bond strength measurement is one of the most effective methods for characterizing commercial dentin bonding products (Yesilyurt and Bulucu, 2006). Bond strengths are generally tested in tension or in shear (Ozer et al, 2003).…”

Effect of different adhesive systems and laser treatment on the shear bond strength of bleached enamel

“…19,20 Furthermore a durable interfacial adhesion between tooth and biomaterial is essential for an ideal restoration. 21 As a part of aesthetic treatment, sometimes vital bleaching combines with aesthetic restorative procedures. When resin composite materials are used, the treatment of the enamel prior to adhesive restorative procedure is an extremely important step to achieve adequate retention of the composite material.…”

Effects of Three Canal Sealers on Bond Strength of a Fiber Post

“…The type of adhesive system used is of the greatest importance for the quality of bonding (10,11). The use of self-etching primers in combination with resin-luting agents has been proposed for the cementation of endodontic posts to eliminate problems associated with the wet bonding technique (12,13).…”