Department of Conservative Dentistry and Dental Research Institute, School of Dentistry, Seoul National University, Seoul, South Korea.
Clin Oral Investig. 2013 Jan;17(1):139-46. doi: 10.1007/s00784-012-0680-x. Epub 2012 Jan 27.
The purpose of this study was to determine the color of white spot lesions.
Human premolars were subjected to a pH cycling to produce artificial caries lesions and classified into groups (n = 10/group): group 1, immersion in deionized water; group 2, pH cycling without fluoride (F) application; group 3, pH cycling with immersion in 1,000 ppm NaF solution; and group 4, pH cycling with immersion in 5,000 ppm NaF solution. CIE Lab* color parameters of the tooth were determined using a spectroradiometer at baseline, after demineralization and after pH cycling. The extent of demineralization was evaluated by scanning electron microscopy (SEM) and electron microprobe analysis (EPMA).
Significant degrees of color change (ΔE*) were observed after demineralization (p < 0.05). The changes were mainly due to an increase in lightness (L*) and a decrease in yellowness (b*). F application induced a significantly large ΔE* in group 4 (p < 0.05). The color reversal after remineralization was mostly due to the recovery of L*. SEM and EPMA verified that net mineral gains occurred in the subsurface lesions.
The initially white appearance of enamel caries was a result of changes of L* and b*. F treatment partially restored the color of white spot lesions.
F-driven remineralization induced both mineral gains and esthetic enhancement of artificially produced enamel white spot lesions. The increase of L* and the decrease of b* contributed to the color changes.
本研究旨在确定白垩斑病变的颜色。
将人前磨牙进行 pH 循环以产生人工龋损病变，并分为以下几组（每组 n = 10）：第 1 组，浸入去离子水中；第 2 组，无氟（F）应用 pH 循环；第 3 组，浸入 1000 ppm NaF 溶液中 pH 循环；第 4 组，浸入 5000 ppm NaF 溶液中 pH 循环。使用分光光度计在基线、脱矿后和 pH 循环后测定牙齿的 CIE Lab*颜色参数。通过扫描电子显微镜（SEM）和电子探针分析（EPMA）评估脱矿程度。
脱矿后观察到明显的颜色变化（ΔE*）（p < 0.05）。这些变化主要是由于明度（L*）增加和黄度（b*）降低所致。第 4 组中 F 的应用导致显著较大的 ΔE*（p < 0.05）。再矿化后的颜色逆转主要归因于 L*的恢复。SEM 和 EPMA 验证了在亚表面病变中发生了净矿物质增加。
釉质龋的初始白色外观是 L和 b变化的结果。F 处理部分恢复了白点病变的颜色。
F 驱动的再矿化诱导了人工产生的釉质白点病变的矿物质增加和美观增强。L的增加和 b的减少导致了颜色变化。
