The susceptibility of bleached enamel to staining as measured by Quantitative Light-induced Fluorescence (QLF)
The susceptibility of bleached enamel to staining as measured by Quantitative Light-induced Fluorescence (QLF)
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DOI：
10.1111/j.1875-595x.2008.tb00350.x
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发表时间：
2008-08-01
影响因子：
3.3
通讯作者：
Higham, S. M.
中科院分区：
文献类型：
--
作者：
Adeyemi, A. A.;Pender, N.;Higham, S. M.
目的：报告使用定量光诱导荧光（QLF）来确定漂白牙釉质是否比未漂白牙釉质更容易吸收外来污渍。方法：选择无牙斑的牛牙，去除牙根，轻轻地打磨牙釉质。每颗牙齿被分成两半，每半随机分为两组（漂白或未漂白）。每半部分都使用透明的耐酸清漆创建了窗户。将38%过氧化氢凝胶应用于漂白组的暴露窗口1小时。冲洗并干燥牙齿。然后将漂白和未漂白的相同牙齿的一半安装在使用绿色棒连接到罐盖的玻璃棒上。拍摄了QLF图像。使牙齿经受人工唾液、洗必泰和茶的循环（在每种溶液中2分钟）。重复5次。在每个周期结束时拍摄QLF图像。结果如下：通过QLF在所有切片中检测染色的吸收和进展。使用配对t检验（SPSS），两组之间从基线到最终染色循环的变化没有显著差异（p > 0.05），但是随着循环的进展，组内的染色吸收存在变异性。结论：体外牙釉质漂白不会增加牙釉质对外源性染色的敏感性。
Objectives: To report the use of Quantitative Light-induced Fluorescence (QLF) to determine if there was a tendency for bleached enamel to take up extrinsic stains more than unbleached enamel. Methods: Bovine teeth devoid of stains were selected, the roots removed and enamel gently pumiced. Each tooth was sectioned into two and each half randomly assigned to two groups (bleached or unbleached). Windows were created on each half using clear acid resistant varnish. 38% Hydrogen peroxide gel was applied to the exposed windows of the bleached group for 1 hour. The teeth were rinsed and dried. Bleached and unbleached halves of the same teeth were then mounted on glass rods attached to pot lids using green stick. QLF images were taken. The teeth were subjected to a cycle of artificial saliva, chlorhexidine and tea (2 minutes in each solution). This was repeated 5 times. QLF images were taken at the end of each cycle. Results: The uptake and progression of stain was detected in all the sections by QLF Using paired t-test (SPSS) there was no significant difference between the two groups for the change from baseline to the final stain cycle (p > 0.05), however there was variability in stain uptake within the groups as the cycles progressed. Conclusion: Bleaching of enamel in vitro does not appear to increase the susceptibility of enamel to extrinsic staining.