Water sorption/solubility of self-etching dentin bonding agents
Water sorption/solubility of self-etching dentin bonding agents
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DOI：
10.1016/j.dental.2010.03.001
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发表时间：
2010-07-01
期刊：
影响因子：
5
通讯作者：
Saito, Takashi
中科院分区：
文献类型：
--
作者：
Ito, Shuichi;Hoshino, Tomohiro;Saito, Takashi
目标.本研究的目的是比较三个单步自酸蚀胶粘剂与两步自酸蚀底漆胶粘剂系统的吸水性/溶解性、转化率和微拉伸粘结强度。溶剂从粘合剂蒸发的重量测定。除去挥发性溶剂后，将树脂浇铸成圆盘并聚合。一半的圆盘在水中孵育，而另一半在十六烷中孵育。重复测量吸水性10天，然后干燥2.5天至恒重。使用FTIR光谱法进行转化百分比。粘接后24 h测量微拉伸粘接强度。所有的粘合剂在4分钟的强制通风后损失了20-30%的重量，除了Fluorobond II没有损失重量。所有储存在水中的树脂表现出时间依赖性增加的吸水性和溶解度。储存在十六烷中的树脂表现出非常低的吸附性和溶解性。Absolute 2（20.7%）的吸水率最高，Fluorobond Shake One（10.2%）居中，Clearfil S-3（8.9%）和Fluorobond II（7.5%）最低。转化百分比范围从Absolute 2的68.3%下限到Clear的87.4%上限。l S-3。两步自蚀刻底漆粘合剂（Fluorobond II）给出了任何测试粘合剂中最低的吸水性和最低的溶解度。在十六烷中孵育的树脂盘的SEM观察结果看起来与未孵育的对照相似。在人工唾液中孵育的树脂片表面覆盖着矿物微晶。单瓶自酸蚀粘合剂显示出比两步自酸蚀粘合剂更高的吸水性/溶解性。预计前一种产品的功能不会像后一种产品那样好。(C)2010年牙科材料学院。由爱思唯尔有限公司出版。保留所有权利。
Objectives. The purpose of this study was to compare the water sorption/solubility, percent conversion and microtensile bond strength of three single-step self-etching adhesives with those of a two-step self-etching primer adhesive system.Methods. Solvent evaporation from the adhesives was determined gravimetrically. After removal of volatile solvents, the resins were cast into disks and polymerized. One-half of the disks were incubated in water while the other half were incubated in hexadecane. Repeated measurements of water sorption were made for 10 days followed by drying for 2.5 days to a constant weight. Percent conversion was done using FTIR spectroscopy. Microtensile bond strengths were measured 24 h after bonding.Results. All of the adhesives lost 20-30% of their weight after 4 min of forced air except for Fluorobond II which lost no weight. All resins stored in water exhibited a time-dependent increase in water sorption and solubility. The resins stored in hexadecane showed very low sorption and solubility. Water sorption was highest for Absolute 2 (20.7%), intermediate for Fluorobond Shake One (10.2%) and lowest for Clearfil S-3 (8.9%) and Fluorobond II (7.5%). Percent conversions ranged from a low of 68.3% for Absolute 2 to a high of 87.4% for Clear. l S-3. The two-step self-etching primer adhesive (Fluorobond II) gave the lowest water sorption and lowest solubility of any of the tested adhesives. SEM observations of resin disks incubated in hexadecane looked similar to unincubated controls. Incubating resin disks in artificial saliva covered the surfaces of the resins with mineral crystallites.Significance. Single bottle self-etching adhesives show higher water sorption/solubilities than two-step self-etching adhesives. The former products would not be expected to function as well as the latter products. (C) 2010 Academy of Dental Materials. Published by Elsevier Ltd. All rights reserved.