Dentin Bonding Durability of Two-step Self-etch Adhesives with Improved of Degree of Conversion of Adhesive Resins
Dentin Bonding Durability of Two-step Self-etch Adhesives with Improved of Degree of Conversion of Adhesive Resins
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DOI：
10.3290/j.jad.a37726
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发表时间：
2017-01-01
影响因子：
3.3
通讯作者：
Tagami, Junji
中科院分区：
文献类型：
--
作者：
Sato, Kento;Hosaka, Keiichi;Tagami, Junji
目的：评价(1)不同转化率(DC)的两步法自酸蚀粘接剂的初始和长期微拉伸粘接强度；(2)各粘接树脂的弹性模量；(3)各粘接树脂的吸水性。材料和方法：两种两步法自酸蚀粘接剂，ClearfilSE Bond(CSE)和ClearfilSE Bond 2(CSE2)。用ATR/FT-IR和基于时间的光谱分析测定DC。用600目碳化硅砂纸制备24颗磨牙冠中平坦牙本质表面，进行微拉伸粘结强度(MU-TBS)测试。根据制造商的说明，将CSE和CSE2应用于牙本质表面，然后进行复合堆积。分别于储水后24小时、6个月、1年测定各时间点的MU-TBS。用三点弯曲试验测定浸水前后的弹性模量，用吸水试验测定吸水值。结果：CSE2的DC明显高于CSE。在所有储水期，CSE2的Mu-TBS均显著高于CSE。一年的蓄水降低了CSE的muTBS，但并没有降低CSE2的muTBS。两步法自酸蚀粘接剂的弹性模量显著高于CSE(p<；0.001)，吸水率明显高于CSE2。结论：两步法自酸蚀粘接剂的粘接树脂具有较高的DC，能抵抗水老化，提高树脂-牙本质粘接的初始粘结强度和耐久性。
Purpose: To evaluate (1) the initial and long-term microtensile bond strengths of two-step self-etch adhesives with different degrees of conversion (DC); (2) the elastic modulus of the respective adhesive resins; (3) the water sorption of the respective adhesive resins.Materials and Methods: Two two-step self-etch adhesives, Clearfil SE Bond (CSE) and Clearfil SE Bond 2 (CSE2) were used in this study. The DC was determined using ATR/FT-IR with a time-based spectrum analysis. Midcoronal flat dentin surfaces of 24 human molars were prepared with 600-grit SiC paper for microtensile bond strength (mu TBS) testing. CSE and CSE2 were applied to the dentin surfaces according to the manufacturer's instructions, followed by composite buildups. The mu TBS was measured after water storage for 24 h, 6 months, and 1 year. The elastic modulus (before and after 1 month of water immersion) was determined by the three-point flexural bending test and water sorption values by the water sorption test.Results: CSE2 showed significantly higher DC than CSE. The mu TBS of CSE2 was significantly higher than that of CSE in all water storage periods. One-year water storage decreased the mu TBS of CSE; however, it did not decrease that of CSE2. Regarding the polymerized adhesive resins, the elastic modulus of CSE2 was significantly higher than that of CSE before and after water immersion (p < 0.001), and the water sorption of CSE was higher than that of CSE2.Conclusions: The higher DC of adhesive resins of two-step self-etch adhesives resists water aging and improves the initial bond strengths and durability of the resin-dentin bond.