Effect of Er,Cr:YSGG Laser and Ascorbic Acid on the Bond Strength and Microleakage of Bleached Enamel Surface
Effect of Er,Cr:YSGG Laser and Ascorbic Acid on the Bond Strength and Microleakage of Bleached Enamel Surface
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DOI：
10.1089/pho.2018.4437
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发表时间：
2018-04-23
影响因子：
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通讯作者：
Vohra, Fahim
中科院分区：
文献类型：
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作者：
Alkhudhairy, Fahad;AlKheraif, Abdulaziz;Vohra, Fahim
背景：现有的Er，Cr：YSGG激光治疗漂白牙釉质的证据有限，且存在争议。认为Er，Cr：YSGG激光能有效地逆转漂白对牙釉质与树脂复合体粘结完整性的影响。目的：评价Er，Cr：YSGG激光对漂白牙釉质粘结强度和微渗漏的影响。材料和方法：从80个样本中，60个样本用40%过氧化氢漂白，并分为三个亚组。分别用10%抗坏血酸钠(GP A)、Er，Cr：YSGG激光(50 Hz和4.5W)(GP L)和不处理(GP B)对漂白样品进行照射。20个样品未漂白(Control-C)。采用酸洗技术，在釉质表面形成树脂复合体，并进行光聚合处理。每组10个试件以1 mm/min的十字头速度进行剪切粘结强度测试。每组10个标本用2%亚甲基蓝进行微渗漏检测。数据分析采用方差分析(ANOVA)和Tukey后多重比较检验。结果：L组粘结强度(30.83+/-1.7000)与A组(31.38+/-2.03)相近，显著高于漂白组(9.49+/-0.86)(p0.05)。结论：Er，Cr：Y-Sc-Ga-石榴石(Er，Cr：YSGG)激光处理漂白釉质对釉质粘结强度和微渗漏有明显的逆转作用。临床意义：Er，Cr：YSGG激光(50赫兹，4.5W)可恢复漂白牙釉质与树脂复合体的粘结强度。
Background: The available evidence of Er,Cr:YSGG lasers on bleached enamel is limited and controversial. It is assumed that Er,Cr:YSGG laser will be effective in reversing the effect of bleaching on adhesive bond integrity of enamel to resin composite. Objective: The study aimed to evaluate the efficacy of Er,Cr:YSGG laser on bond strength and microleakage of bleached enamel. Materials and methods: From the 80 samples, 60 samples were bleached (40% hydrogen peroxide) and divided into three subgroups. Twenty bleached samples in each subgroup were exposed to 10% sodium ascorbate (Gp A), Er,Cr:YSGG laser (50Hz and 4.5 W) (Gp L), and no treatment (Gp B), respectively. Twenty samples were not bleached (Control-C). Using etch and rinse technique, resin composite was built-up on enamel and photopolymerized. Ten specimens in each group were tested for shear bond strength at a crosshead speed of 1mm/min. Ten specimens in each group were tested for microleakage using 2% methylene blue. Data were analyzed using analysis of variance (ANOVA) and Tukey post hoc multiple comparisons test. Results: The mean bond strength of specimens in group L (30.83 +/- 1.7000) was comparable with group A (31.38 +/- 2.03) and was significantly higher than bleached specimens (9.49 +/- 0.86) (p0.05). Conclusions: Treatment of bleached enamel with erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser showed a significant reversal effect on the enamel bond strength and microleakage scores. Clinical Significance: Er,Cr:YSGG laser (50Hz, 4.5 W) treatment has the potential to restore the bond strength of bleached enamel to resin composite.