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首页> 外文期刊>International Journal of Adhesion & Adhesives >Influence of storage time on bond strength of self-etching adhesive systems to artificially demineralized dentin after a papain gel chemical-mechanical agent application
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Influence of storage time on bond strength of self-etching adhesive systems to artificially demineralized dentin after a papain gel chemical-mechanical agent application

机译：木瓜胶化学机械剂应用后，储存时间对自蚀胶体系与人工脱矿牙本质粘合强度的影响

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Objectives: The aim of this study was to evaluate the influence of storage time on the bond strength of self-etching adhesive systems to artificially demineralized dentin submitted to application of a papain-based chemical mechanical agent for carious tissue removal. Materials and Methods: Twenty-four blocks of human coronal dentin were randomly divided into 2 groups: (1) restored with a two-step self-etching adhesive system (Clearfil SE Bond); (2) restored with a one-step self-etching adhesive system (One-Up Bond F Plus). After artificial caries induction, the specimens were treated with papain-based gel, received an application of the adhesive system according to the respective group, and blocks of microhybrid resin composite measuring 5.0 mm high and 5.0 mm wide were fabricated incrementally on the tooth, which would later be cut to obtain sticks with a bond area of around 1 mm~2, for use in the microtensile tests. After this, half of the sticks obtained from each tooth were submitted to the microtensile test 24 h later, while the other half were stored in water, in an oven at 37° C for a period of 180 d. The specimens were submitted to the microtensile test in a Universal Test Machine at a speed of 0.5 mm/min. The surfaces of the fractured test specimens were examined visually under a stereoscopic loupe in order to classify the fracture type. After exploratory analysis of the data, the two-way Analysis of Variance (ANOVA) and the Tukey test were applied. The data on the fracture types were analyzed by the Exact Fisher test. Results: No statistically relevant differences were verified among the means of the microtensile bond strength values of the adhesive systems evaluated in the different storage times. Mixed and adhesive fractures types were observed for both groups. Conclusion: Storage time did not influence the bond strength of the two-step or one-step self-etching adhesive systems to artificially demineralized dentin submitted to application of a papain-based chemical mechanical agent for carious tissue removal. Both adhesive systems provided similar bond strength at different storage times.
机译：目的：本研究的目的是评估保存时间对自蚀刻胶粘剂系统对人工去矿质牙本质的粘接强度的影响，该粘接剂已应用木瓜基化学机械剂进行龋齿组织去除。材料与方法：将二十四块人类冠状牙本质随机分为2组：（1）用两步自蚀刻粘合剂系统（Clearfil SE Bond）修复; （2）使用一步式自蚀刻粘合剂系统（One-Up Bond F Plus）进行修复。经过人工龋齿诱导后，用木瓜蛋白酶凝胶对标本进行处理，并根据各自的组别应用粘合剂体系，并在牙齿上逐步制造出5.0毫米高和5.0毫米宽的微混合树脂复合材料块，随后将其切割以获得粘结面积约为1 mm〜2的棒，用于微拉伸试验。此后，将从每颗牙齿获得的棍棒的一半在24小时后进行微拉伸试验，而另一半则在37°C的烤箱中储存在水中180天。将样品在通用试验机中以0.5mm / min的速度进行微拉伸试验。在立体放大镜下目视检查断裂的试样的表面，以对断裂类型进行分类。在对数据进行探索性分析之后，应用了方差的双向分析（ANOVA）和Tukey检验。裂缝类型的数据通过精确Fisher检验进行了分析。结果：在不同储存时间下评估的胶粘剂体系的微拉伸粘合强度值的平均值之间没有统计上相关的差异。两组均观察到混合性骨折和粘连性骨折。结论：储存时间不影响两步或一步自蚀刻胶粘剂系统对人工去矿质牙本质的粘合强度，而后者已应用木瓜基化学机械剂去除龋齿组织。两种胶粘剂系统在不同的存储时间下均具有相似的粘合强度。

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