Ferreira João C, Pires Patrícia T, de Azevedo Álvaro F, Arantes-Oliveira Sofia, Silva Mário J, de Melo Paulo R
Department of Operative Dentistry, Faculty of Dental Medicine, University of Porto, Porto, Portugal, e-mail:
Department of Operative Dentistry, Faculty of Dental Medicine, University of Porto, Porto, Portugal.
J Contemp Dent Pract. 2017 Oct 1;18(10):947-958. doi: 10.5005/jp-journals-10024-2155.
The study aimed to analyze the morphology of the dentin-resin interface yielded by two-step etch-and-rinse adhesive systems with different solvents and compositions.
A total of 32 dentine disks were prepared and randomly assigned to four groups of one-bottle etch-and-rinse adhesive systems containing different solvents: group I, Adper Scotchbond-IXT™ (ethanol/water); group II, XP-Bond™ (tertiary butanol); group III, Prime and Bond NT (acetone); and group IV, One Coat bond® (5% water). Adhesive systems were applied onto dentin disks, which were then thermal cycled, divided into two hemi-disks (n = 16), and prepared for field-emission scanning electron microscopy to examine the dentin-resin interdiffusion zone. Microphotographs were scanned and data were processed. Data were compared with analysis of variance multivariant test after Kolmogorov-Smirnov and Shapiro-Wilk tests using Statistic Package for the Social Sciences.
The adhesive layer thickness average found was group I: 45.9 ± 13.41 urn, group II: 20.6 ± 16.32 urn, group III: 17.7 ± 11.75 urn, and group IV: 50.7 ± 27.81 urn. Significant differences were found between groups I and IV and groups II and III (p < 0.000). Groups I (3.23 ± 0.53 μm) and II (3.13 ± 0.73 μm) yielded significantly thicker hybrid layers than groups III (2.53 ± 0.50 μm) and IV (1.84 ± 0.27 μm) (p < 0.003). Group III presented a less homogeneous hybrid layer, with some gaps. Tag length average was greater in groups II (111.0 ± 36.92 μm) and IV (128.9 ± 78.38 μm) than in groups I (61.5 ± 18.10 μm) and III (68.6 ± 15.84 μm) (p < 0.008).
Adhesives systems with different solvents led to significant differences in the dentin-resin interface morphology. Solvents role in adhesives bond strength should be considered together with the other adhesive system components.
The adhesive containing tertiary butanol, in addition, seems to originate a good-quality hybrid layer and long, entangled tags and also appears to have greater ability to originate microtags, which may indicate higher bond strength.
本研究旨在分析由具有不同溶剂和成分的两步蚀刻冲洗粘结系统产生的牙本质 - 树脂界面的形态。
共制备32个牙本质盘，并随机分为四组，每组使用含不同溶剂的单瓶蚀刻冲洗粘结系统：第一组，Adper Scotchbond - IXT™（乙醇/水）；第二组，XP - Bond™（叔丁醇）；第三组，Prime and Bond NT（丙酮）；第四组，One Coat bond®（5%水）。将粘结系统应用于牙本质盘，然后进行热循环，将其分成两个半盘（n = 16），并制备用于场发射扫描电子显微镜检查牙本质 - 树脂相互扩散区。扫描显微照片并处理数据。在使用社会科学统计软件包进行Kolmogorov - Smirnov和Shapiro - Wilk检验后，通过方差分析多变量检验比较数据。
发现的粘结层平均厚度为：第一组：45.9±13.41μm，第二组：20.6±16.32μm，第三组：17.7±11.75μm，第四组：50.7±27.81μm。在第一组和第四组以及第二组和第三组之间发现了显著差异（p < 0.000）。第一组（3.23±0.53μm）和第二组（3.13±0.73μm）产生的混合层明显比第三组（2.53±0.50μm）和第四组（1.84±0.27μm）厚（p < 0.003）。第三组呈现出不太均匀的混合层，有一些间隙。第二组（111.0±36.92μm）和第四组（128.9±78.38μm）的平均标签长度大于第一组（61.5±18.10μm）和第三组（68.6±15.84μm）（p < 0.008）。
具有不同溶剂的粘结系统导致牙本质 - 树脂界面形态存在显著差异。应将溶剂在粘结强度中的作用与其他粘结系统成分一起考虑。
此外，含叔丁醇的粘结剂似乎能形成高质量的混合层和长而缠结的标签，并且似乎具有更强的产生微标签的能力，这可能表明粘结强度更高。
