The effect of warm air-blowing on the microtensile bond strength of one-step self-etch adhesives to root canal dentin

TY - JOUR

T1 - The effect of warm air-blowing on the microtensile bond strength of one-step self-etch adhesives to root canal dentin

AU - Taguchi, Keita

AU - Hosaka, Keiichi

AU - Ikeda, Masaomi

AU - Kishikawa, Ryuzo

AU - Foxton, Richard

AU - Nakajima, Masatoshi

AU - Tagami, Junji

PY - 2018/2/1

Y1 - 2018/2/1

N2 - Purpose The use of warm air-blowing to evaporate solvents of one-step self-etch adhesive systems (1-SEAs) has been reported to be a useful method. The purpose of this study was to evaluate the effect of warm air-blowing on root canal dentin. Methods Four 1-SEAs (Clearfil Bond SE ONE, Unifil Core EM self-etch bond, Estelink, BeautiDualbond EX) were used. Each 1-SEA was applied to root canal dentin according to the manufacturers’ instructions. After the adhesives were applied, solvent was evaporated using either normal air (23 ± 1 °C) or warm air (80 ± 1 °C) for 20 s, and resin composite was placed in the post spaces. The air from the dryer, which could be used in normal- or hot-air-mode, was applied at a distance of 5 cm above the root canal cavity in the direction of tooth axis. The temperature of the stream of air from the dryer in the hot-air-mode was 80 ± 1 °C, and in the normal mode, 23 ± 1 °C. After water storage of the specimens for 24 h, the μTBS were evaluated at the coronal and apical regions. The μTBSs were statistically analyzed using three-way ANOVA and Student’s t-test with Bonferroni correction (α = 0.05). Results The warm air-blowing significantly increased the μTBS of all 1-SEAs at the apical regions, and also significantly increased the μTBS of two adhesives (Estelink and BeautiDualBond EX) at coronal regions. Conclusions The μTBS of 1-SEAs to root canal dentin was improved by using warm air-blowing.

AB - Purpose The use of warm air-blowing to evaporate solvents of one-step self-etch adhesive systems (1-SEAs) has been reported to be a useful method. The purpose of this study was to evaluate the effect of warm air-blowing on root canal dentin. Methods Four 1-SEAs (Clearfil Bond SE ONE, Unifil Core EM self-etch bond, Estelink, BeautiDualbond EX) were used. Each 1-SEA was applied to root canal dentin according to the manufacturers’ instructions. After the adhesives were applied, solvent was evaporated using either normal air (23 ± 1 °C) or warm air (80 ± 1 °C) for 20 s, and resin composite was placed in the post spaces. The air from the dryer, which could be used in normal- or hot-air-mode, was applied at a distance of 5 cm above the root canal cavity in the direction of tooth axis. The temperature of the stream of air from the dryer in the hot-air-mode was 80 ± 1 °C, and in the normal mode, 23 ± 1 °C. After water storage of the specimens for 24 h, the μTBS were evaluated at the coronal and apical regions. The μTBSs were statistically analyzed using three-way ANOVA and Student’s t-test with Bonferroni correction (α = 0.05). Results The warm air-blowing significantly increased the μTBS of all 1-SEAs at the apical regions, and also significantly increased the μTBS of two adhesives (Estelink and BeautiDualBond EX) at coronal regions. Conclusions The μTBS of 1-SEAs to root canal dentin was improved by using warm air-blowing.

KW - One-step self-etch adhesive

KW - Root canal dentin

KW - Warm air-blowing

KW - Microtensile bond strength

U2 - 10.1016/j.jpor.2017.12.006

DO - 10.1016/j.jpor.2017.12.006

M3 - Article

SN - 1883-1958

JO - Journal of Prosthodontic Research

JF - Journal of Prosthodontic Research

ER -