Altunsoy Mustafa, Botsali Murat Selim, Korkut Emre, Kucukyilmaz Ebru, Sener Yagmur
Department of Pediatric Dentistry, Faculty of Dentistry, Sifa University , Izmir , Turkey.
Acta Odontol Scand. 2014 Nov;72(8):874-9. doi: 10.3109/00016357.2014.919664. Epub 2014 May 21.
The aim of this study was to evaluate the effect of different surface treatments on the microtensile bond strength (μTBS) and shear bond strength (SBS) of resin-modified glass ionomer cement (RMGIC) to dentin.
Fifty-two extracted human molars were flattened to obtain dentin surfaces. For SBS assessment 40 teeth were divided into four groups according to their surface treatments (acid etching, Er:YAG laser QSP mode, Er:YAG laser MSP mode and control-SiC) (n = 10). A plastic cylinder was placed over the differently treated dentin surfaces and RMGIC was placed into the rings and polymerized. Twelve teeth were used for the μTBS test. The treated dentin surfaces described above were restored with 4 mm high RMGIC and light cured; then, the specimens were sectioned into serial sticks (n = 15) and μTBS and SBS were tested for failure in a testing machine with a 1 mm/min crosshead speed. The data were analyzed by one-way ANOVA and Tukey HSD tests (α = 0.05).
Acid etching showed significantly higher SBS than the other groups (p < 0.05). Er:YAG QSP and MSP-treated groups showed higher SBS values than the control group, but the difference was not statistically significant (p > 0.05). Er:YAG MSP showed the highest μTBS value followed by acid etching, whereas the control group exhibited the lowest value (p < 0.05) and the differences between the control group and Er:YAG QSP were not significant (p > 0.05).
The application of Er:YAG MSP mode and acid etching to dentin can be used for improving the bond strength of RMGIC.
本研究旨在评估不同表面处理对树脂改性玻璃离子水门汀（RMGIC）与牙本质之间的微拉伸粘结强度（μTBS）和剪切粘结强度（SBS）的影响。
将52颗拔除的人类磨牙磨平以获得牙本质表面。为进行SBS评估，根据表面处理方式（酸蚀、铒钇铝石榴石激光QSP模式、铒钇铝石榴石激光MSP模式和对照组 - 碳化硅）将40颗牙齿分为四组（n = 10）。在不同处理的牙本质表面放置一个塑料圆柱体，将RMGIC放入环中并聚合。12颗牙齿用于μTBS测试。用4毫米高的RMGIC修复上述处理过的牙本质表面并光固化；然后，将标本切成连续的小棒（n = 15），并在十字头速度为1毫米/分钟的测试机上测试μTBS和SBS的失效情况。数据采用单因素方差分析和Tukey HSD检验进行分析（α = 0.05）。
酸蚀组的SBS显著高于其他组（p < 0.05）。铒钇铝石榴石激光QSP和MSP处理组的SBS值高于对照组，但差异无统计学意义（p > 0.05）。铒钇铝石榴石激光MSP组的μTBS值最高，其次是酸蚀组，而对照组的值最低（p < 0.05），对照组与铒钇铝石榴石激光QSP组之间的差异不显著（p > 0.05）。
将铒钇铝石榴石激光MSP模式和酸蚀应用于牙本质可用于提高RMGIC的粘结强度。
