Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
Department of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.
J Prosthodont Res. 2018 Jul;62(3):330-336. doi: 10.1016/j.jpor.2017.12.006. Epub 2018 Feb 1.
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.
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 20s, 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 5cm 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 24h, 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).
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.
The μTBS of 1-SEAs to root canal dentin was improved by using warm air-blowing.
使用热空气吹除法蒸发一步自酸蚀粘结剂系统（1-SEAs）的溶剂已被报道为一种有用的方法。本研究的目的是评估热空气吹除法对根管牙本质的影响。
使用四种 1-SEAs（Clearfil Bond SE ONE、Unifil Core EM 自酸蚀粘结剂、Estelink、BeautiDualbond EX）。每种 1-SEA 均按照制造商的说明应用于根管牙本质。涂胶后，用正常空气（23±1°C）或热空气（80±1°C）吹 20s 蒸发溶剂，然后将树脂复合材料放入桩腔。干燥器的空气（可在正常或热空气模式下使用）以距根管腔 5cm 的距离沿牙轴方向吹向根管。热空气模式下干燥器气流的温度为 80±1°C，正常模式下为 23±1°C。试件水储存 24h 后，在冠部和根尖部评估 μTBS。使用三因素方差分析和学生 t 检验（Bonferroni 校正，α=0.05）对 μTBS 进行统计分析。
热空气吹除法显著提高了所有 1-SEAs 在根尖部的 μTBS，也显著提高了两种粘结剂（Estelink 和 BeautiDualbond EX）在冠部的 μTBS。
使用热空气吹除法可提高 1-SEAs 对根管牙本质的 μTBS。
