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首页> 外文期刊>Journal of Physics: Conference Series >Comparison of microleakage from gingival wall restorations with and without sonically activated bulk-fill composite resins and incrementally layered composite resin: A laboratory experimental study
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Comparison of microleakage from gingival wall restorations with and without sonically activated bulk-fill composite resins and incrementally layered composite resin: A laboratory experimental study

机译：带有和不带有声波活化的块状填充复合树脂和增量层状复合树脂的牙龈壁修复体微渗漏的比较：一项室内实验研究

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摘要

One of the factors that determine the success of proximal composite restorations is a good marginal adaptation at the interface area. During polymerization, composite resin will undergo contraction which may cause gap formation between the wall cavity and restoration. The gap can cause microleakage and provide a passage for bacteria, fluid, molecules, and ions. The purpose of this study was to analyze the microleakage from gingival wall restorations with and without sonically activated bulk-fill nanohybrid composite resins and incrementally layered nanohybrid composite resins. Standardized Class II cavities were prepared on 30 extracted human upper and lower human teeth and were randomly assigned to three groups: filled with sonically activated bulk-fill composite resin, filled without sonically activate resin, and filled incrementally with resin. The specimens were stored in distilled water for 24 hours, were subjected to thermocycling, and were followed by immersion in 1% methylene blue dye for 24 hours. The teeth were sectioned longitudinally, were evaluated for microleakage under a stereomicroscope at 25x magnification, and were scored from 0–3. The Kolmogorov–Smirnov test was used to perform the statistical analysis. None of the techniques was capable of eliminating microleakage from gingival wall cavity preparations. There were no statistically significant leakage differences among the three groups.
机译：决定近端复合修复成功的因素之一是在界面区域的良好边缘适应性。在聚合过程中，复合树脂将收缩，这可能导致壁腔和修复体之间形成缝隙。间隙会引起微渗漏，并为细菌，液体，分子和离子提供通道。这项研究的目的是分析牙龈壁修复体的微渗漏，无论是否使用超声波活化的块状填充纳米混杂复合树脂和递增层状纳米混杂复合树脂。在30只拔出的人类上下颌牙齿上准备了标准化的II类腔体，并随机分为三组：用声波活化的块状填充复合树脂填充，不用声波活化的树脂填充以及逐渐用树脂填充。将样品在蒸馏水中保存24小时，进行热循环，然后将其浸入1％亚甲基蓝染料中24小时。将牙齿纵向切开，在体视显微镜下以25倍放大倍数评估微渗漏，并从0-3评分。使用Kolmogorov–Smirnov检验进行统计分析。没有一种技术能够消除牙龈壁腔准备中的微渗漏。三组之间没有统计学上显着的泄漏差异。

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