粘结层对纳米复合树脂与牙本质微剪切粘结强度的影响。

Effect of adhesive layers on microshear bond strength of nanocomposite resin to dentin.

作者信息

Felemban Nayef H, Ebrahim Mohamed I

机构信息

Faculty of Dentistry, Taif University, Al Huwaya, Taif, Saudi Arabia.

出版信息

J Clin Exp Dent. 2017 Feb 1;9(2):e186-e190. doi: 10.4317/jced.53133. eCollection 2017 Feb.

DOI:10.4317/jced.53133

PMID:28210433

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5303315/

Abstract

BACKGROUND

Bond strength of adhesive layer can absorb unwanted stresses of polymerization shrinkage in composite resin restorations; increased microshear bond strength can prevent failure of restoration materials, the purpose of this study was to evaluate the effect of adhesive layers on microshear bond strength of nanocomposite resin to dentin.

MATERIAL AND METHODS

Two different types of adhesive systems: universal adhesive (ExciTE) and newly developed adhesive (Nano-Bond), and one type of light-cured resin restorative material (Nanocomposite resin) were used in this study. The occlusal surfaces of extracted human molar teeth were ground perpendicular to the long axis of each tooth to expose a flat dentin surface. The adhesives were applied on dentin surfaces (single application or double application). Nanocomposite resin was then placed and light cured for 40 seconds. After 24 hours of immersion in water at 37°C, then subjected to thermocycling before testing, a microshear bond test was carried out. The data were analyzed by a two-way ANOVA. For comparison between groups, Tukey's post-hoc test was used.

RESULTS

The mean bond strengths of ExciTE and Nano-Bond adhesives with a single application were 8.8 and 16.6 MPa, respectively. The mean bond strengths of ExciTE and Nano-Bond adhesives with double application were 13.2 and 21.8MPa, respectively. There were no statistically significant differences in microshear bond strengths between the single application of Nano-Bond and the double application of ExciTE adhesives.

CONCLUSIONS

Microshear bond strength increased significantly as the applied adhesive layer was doubled. Adhesive, microshear, bond, strength, nanocomposite.

摘要

背景

粘结层的粘结强度可吸收复合树脂修复体中聚合收缩产生的有害应力；提高微剪切粘结强度可防止修复材料失效，本研究旨在评估粘结层对纳米复合树脂与牙本质微剪切粘结强度的影响。

材料与方法

本研究使用了两种不同类型的粘结系统：通用粘结剂（ExciTE）和新开发的粘结剂（Nano-Bond），以及一种光固化树脂修复材料（纳米复合树脂）。将拔除的人磨牙的咬合面垂直于每颗牙齿的长轴进行研磨，以暴露出平坦的牙本质表面。将粘结剂涂覆在牙本质表面（单次涂覆或两次涂覆）。然后放置纳米复合树脂并光固化40秒。在37°C的水中浸泡24小时后，在测试前进行热循环，然后进行微剪切粘结测试。数据采用双向方差分析进行分析。为了比较各组之间的差异，使用了Tukey事后检验。

结果

ExciTE粘结剂和Nano-Bond粘结剂单次涂覆的平均粘结强度分别为8.8MPa和16.6MPa。ExciTE粘结剂和Nano-Bond粘结剂两次涂覆的平均粘结强度分别为13.2MPa和21.8MPa。Nano-Bond粘结剂单次涂覆与ExciTE粘结剂两次涂覆之间的微剪切粘结强度无统计学显著差异。