Bahari Mahmoud, Savadi-Oskoee Siavash, Kimyai Soodabeh, Savadi-Oskoee Ayda, Abbasi Farhang
Assistant Professor, Dental and Periodontal Research Center and Department of Operative Dentistry, Dental Faculty, Tabriz University of Medical Sciences, Tabriz, Iran.
Professor, Department of Operative Dentistry, Dental Faculty, Tabriz University of Medical Sciences, Tabriz, Iran.
J Clin Exp Dent. 2018 Aug 1;10(8):e732-e738. doi: 10.4317/jced.54436. eCollection 2018 Aug.
Considering the differences in the filler particles between giomer and conventional composite resins and the importance of these fillers in the repair bond strength, the aim was to evaluate the effects of different etching strategies with phosphoric acid (PA) and hydrofluoric acid (HF) on the microtensile repair bond strength (µTRBS) of giomer.
Ten giomer blocks were randomly assigned into 10: 1) control; 2) 37%PA-20s; 3) 3%HF-20s; 4) 3%HF-120s; 5) 9.6%HF-20s; 6) 9.6%HF-120s; 7) 37%PA-20s + 3%HF-120s; 8) 37%PA-20s + 9.6%HF-120s; 9) 3%HF-120s + 37%PA-20s; 10) 9.6%HF-120s + 37%PA-20s. In all groups, the One-Step Plus bonding system was applied and the new giomer block was bonded to the existing giomer. After cross-sectional cutting, 18 samples were prepared from each block and the µTRBS of the samples was measured at a strain rate of 0.5 mm/min. Data were analyzed with one-way ANOVA and post hoc Tukey tests (<0.05).
The µTRBS in groups 4, 5, 6, 7, 8 and 10 were significantly higher than that in the control group (<0.05). The µTRBS in group 2 was even less than that in the control group (<0.001). The highest µTRBS was recorded in group 10, which was significantly different from those in groups 3, 4 and 9 (<0.05). In addition, the differences between group 9 and groups 6, 7 and 8 were significantly different (<0.05).
Etching with PA resulted in a decrease in µTRBS. Etching with HF, except for 3%HF-20s and HF after etching with PA, resulted in a significant increase in giomer`s µTRBS. An increase in the application time of 3%HF resulted in a significant increase in the µTRBS. Dental restoration repair, Hydrofluoric acid, Phosphoric acid, etching.
考虑到聚硅烷复合树脂与传统复合树脂的填充颗粒存在差异，且这些填料对修复粘结强度很重要，本研究旨在评估用磷酸（PA）和氢氟酸（HF）进行不同蚀刻策略对聚硅烷微拉伸修复粘结强度（µTRBS）的影响。
将10个聚硅烷块随机分为10组：1）对照组；2）37%PA蚀刻20秒；3）3%HF蚀刻20秒；4）3%HF蚀刻120秒；5）9.6%HF蚀刻20秒；6）9.6%HF蚀刻120秒；7）37%PA蚀刻20秒+3%HF蚀刻120秒；8）37%PA蚀刻20秒+9.6%HF蚀刻120秒；9）3%HF蚀刻120秒+37%PA蚀刻20秒；10）9.6%HF蚀刻120秒+37%PA蚀刻20秒。在所有组中，均应用单步加粘结系统，并将新的聚硅烷块粘结到现有的聚硅烷上。横截面切割后，从每个块中制备18个样本，并以0.5 mm/min的应变率测量样本的µTRBS。数据采用单因素方差分析和事后Tukey检验进行分析（<0.05）。
第4、5、6、7、8和10组的µTRBS显著高于对照组（<0.05）。第2组的µTRBS甚至低于对照组（<0.001）。第10组的µTRBS最高，与第3、4和9组有显著差异（<0.05）。此外，第9组与第6、7和8组之间的差异也有统计学意义（<0.05）。
用PA蚀刻会导致µTRBS降低。用HF蚀刻，除了3%HF蚀刻20秒以及PA蚀刻后再用HF蚀刻外，会使聚硅烷的µTRBS显著增加。3%HF应用时间的增加会导致µTRBS显著增加。牙齿修复、氢氟酸、磷酸、蚀刻。
