Department of Oral Biomaterials and Technology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan.
Arch Oral Biol. 2010 Apr;55(4):300-8. doi: 10.1016/j.archoralbio.2010.02.009. Epub 2010 Mar 24.
Colour modification of tooth enamel has proven successful, but it is unclear how various bleaching applications affect micro-structural integrity of the whitened enamel. To investigate the internal structural integrity of human intact tooth enamel with the application of two commonly used whitening regimes (in-office power bleaching with 35% hydrogen peroxide and home bleaching with 10% carbamide peroxide), evaluations were performed on teeth of identical colour classification. After the bleaching applications, the enamel mineral density was quantified and visualised with micro-computed tomography. The micro-structural differences between the whitened tooth enamel samples were distinctive, though the colour parameter changes within the samples were equivalent. Home bleaching achieved colour modification by demineralisation, whereas in-office bleaching depended on redistribution of the minerals after treatment and subsequent enhanced mineralisation.
牙齿珐瑯质的颜色修饰已被证明是成功的，但目前尚不清楚各种漂白应用如何影响漂白后的珐瑯质的微观结构完整性。为了研究两种常用的漂白方案（诊室用 35%过氧化氢动力漂白和家庭用 10%过氧化脲漂白）对人完整牙珐瑯质内部结构完整性的影响，对颜色分类相同的牙齿进行了评估。漂白应用后，使用微计算机断层扫描对珐瑯质的矿物质密度进行量化和可视化。尽管样品内的颜色参数变化相当，但漂白后的牙珐瑯质样本之间的微观结构差异明显。家庭漂白通过脱矿质来实现颜色修饰，而诊室漂白则依赖于治疗后矿物质的再分布和随后的增强矿化。
