Bleaching effect on bonding performance of composite to enamel

IF 2 3区工程技术 Q2 ANATOMY & MORPHOLOGY Microscopy Research and Technique Pub Date : 2024-06-05 DOI:10.1002/jemt.24627

Milan Miljkovic, Stefan Dacic, Vladimir Mitic, Milica Jovanovic, Marija Andjelkovic-Apostolovic

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Abstract

This study aimed to assess the effects of dental bleaching on the immediate shear bond strength (SBS) of composite to enamel. Different bleaching methods and time intervals between bleaching and composite restoration were examined. A total of 45 enamel specimens were divided into three groups (n = 15) based on the applied bleaching protocol: in-office (A), at-home (B), and unbleached control (C). Groups A and B were then subdivided into three time intervals until bonding: 1, 3, and 7 days. The composite was bonded to enamel using self-etch adhesive technique and submitted to SBS testing. The enamel surface and adhesive interface were observed under scanning electron microscope (SEM). The highest average SBS was measured in the control (unbleached) group (31.1 ± 3.4). A significant difference in SBS was found between the control and in-office bleaching (p < .001), as well as between control and at-home bleaching (p = .034), while the difference between in-office and at-home bleaching methods was insignificant. In relation to the waiting period, a significant reduction in SBS (p < .001) was found 1 day post-bleaching. The weakest marginal sealing to enamel under SEM was observed also 1 day after bleaching. Both bleaching methods significantly reduced the SBS of composite to enamel, especially immediately after the bleaching procedure. Reduction in SBS is temporary and 3-day waiting period seems to be sufficient to reverse the adverse effects of bleaching.

Research Highlights

SBS of composite to enamel is significantly reduced by bleaching procedures, especially immediately after bleaching.
The reduction in SBS is temporary and reversible by delaying the restoration for a minimum of 3 days.

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漂白对复合材料与珐琅质粘接性能的影响。

本研究旨在评估牙齿漂白对复合材料与珐琅质的即时剪切粘接强度（SBS）的影响。研究考察了不同的漂白方法以及漂白与复合树脂修复之间的时间间隔。根据漂白方案的不同，总共 45 个珐琅质样本被分为三组（n = 15）：诊室漂白组（A）、居家漂白组（B）和未漂白对照组（C）。然后将 A 组和 B 组细分为三个时间间隔，直至粘合：1、3 和 7 天。使用自酸蚀粘接技术将复合材料粘接到牙釉质上，并进行 SBS 测试。在扫描电子显微镜（SEM）下观察牙釉质表面和粘合界面。对照组（未漂白）的平均 SBS 值最高（31.1 ± 3.4）。对照组和诊室漂白组的 SBS 有明显差异（p

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来源期刊

Microscopy Research and Technique 医学-解剖学与形态学

CiteScore

5.30

自引率

20.00%

发文量

233

审稿时长

4.7 months

期刊介绍： Microscopy Research and Technique (MRT) publishes articles on all aspects of advanced microscopy original architecture and methodologies with applications in the biological, clinical, chemical, and materials sciences. Original basic and applied research as well as technical papers dealing with the various subsets of microscopy are encouraged. MRT is the right form for those developing new microscopy methods or using the microscope to answer key questions in basic and applied research.