Effect of remaining dentin thickness on microtensile bond strength of current adhesive systems

Abstract

The purpose of this study was to evaluate the effect of remaining dentin thickness (RDT) on the bond strength of current adhesive systems. Third molars were randomly allocated among four groups depending on the adhesive system used: Clearfil SE Bond ONE (SE1), G-Bond PLUS (GB), BeautiBond (BB), and Clearfil Mega Bond (MB). Bonded specimens were stored in water at 37°C for 24 h. Teeth were then sectioned perpendicular to the adhesive interface to produce beams. After measuring RDT of each beam, microtensile bond strength test was carried out using a universal testing machine at a crosshead speed of 1 mm/min. All data were analyzed by linear regression analysis. Bond strengths of one-step self-etch materials used in this study increased with an increase in RDT. In contrast, that of two-step self-etch adhesive system was not affected by RDT.

Effect of different remaining dentin thickness and long term water storage on dentin bond strength

“…Subsequently, CLEARFIL AP-X resin composite (Kuraray Noritake Dental) was applied onto the bonded dentin surface. After storage in 37°C water for 24 h, the teeth in each group were sectioned perpendicularly to the adhesive interface to produce beams, using an Isomet diamond saw under water for cooling as previously reported 1) . Each tooth yielded 2-4 beams (cross-sectional area: 1×1 mm).…”

“…Several factors are known to affect the performance of adhesive materials. One important factor is the dentin depth or remaining dentin thickness (RDT) [1][2][3][4] . The RDT has been shown recently to have a significant effect on the microtensile bond strengths (µTBS) 1) .…”

“…One important factor is the dentin depth or remaining dentin thickness (RDT) [1][2][3][4] . The RDT has been shown recently to have a significant effect on the microtensile bond strengths (µTBS) 1) . Furthermore, the bond strengths of one-step self-etch adhesive materials were shown to have a correlation with the RDT in short term water storage, whereas the two-step self-etch materials were not affected by RDT 1) .…”

Evaluation of Micro-Tensile Bond Strength of New Composite Resins With Dentin. An In Vitro Study

“…(25) This agreement with Yoshida et al (26), Oznurhan et al in (16) whose found that with total-etch adhesive system the major elements that contribute to bond strength are intratubular resin-tag into demineralized intertubular dentine. This might be more difficult to happen in deep dentin because of the smaller amount of intertubular dentin to form the hybrid layer ,therefore deep dentin is more porous and retains more water within its enlarged tubule openings, which may avoid appropriate lateral bonding of the resin tags This disagreement with Ting et al (27) who reported that that the bond strength of one-step self-etch adhesive materials increased with increasing remaining dentin thickness (RDT), whereas that of two-step selfetch material was not affected by RDT. This may be due to different materials and methods.…”

Influence of ethanol-wet dentin, adhesive mode of application, and aging on bond strength of universal adhesive

“…Their roots were cut close to the cementum-enamel junction, and the buccal surface was grounded using 600-grit sandpaper (SiC, Fepa-P), resulting in a minimum dentin area of 6 × 6 mm. 15 The specimens were embedded in self-curing acrylic resin (Jet Classic, São Paulo, SP, Brazil) with the dentin surface facing down. The smear layer was standardized using an automated polishing device (Autopol, Panambra, São Paulo, SP, Brazil) with 600-grit sandpaper (SiC Fepa-P) under constant water irrigation at 300 rpm for 30 s, in accordance with ISO / TS11405:2015.…”