Operative Dentistry, School of Dentistry, Federal University of Santa Catarina, Florianopolis, SC, Brazil.
J Dent. 2012 Jul;40 Suppl 1:e35-9. doi: 10.1016/j.jdent.2012.01.011. Epub 2012 Feb 1.
To evaluate the influence of tooth bleaching on the opalescence properties of enamel.
Color of 38 specimens was determined by colorimetric analysis before and after bleaching in the reflectance and transmittance modes. The results were described as CIELab color coordinates. The Opalescent Parameter (OP) was calculated as the difference in yellow-blue color coordinate (CIE Δb*) and red-green color coordinate (CIE Δa*) between the reflected and transmitted colors.
Mean OP value of the specimens was 18.9 (±1.6) before bleaching and 16.1 (±1.0) after bleaching.
Bleaching decreases the OP of the specimens (p>0.001). OP decrease was correlated with differences in b* color coordinate in the transmittance mode.
评估牙齿漂白对牙釉质乳光性能的影响。
采用反射和透射模式，在漂白前后通过比色分析确定 38 个样本的颜色。结果以 CIELab 颜色坐标表示。乳光参数（OP）计算为反射和透射颜色之间的黄-蓝颜色坐标（CIE Δb*）和红-绿颜色坐标（CIE Δa*）的差异。
漂白前标本的平均 OP 值为 18.9（±1.6），漂白后为 16.1（±1.0）。
漂白降低了标本的 OP（p>0.001）。OP 降低与透射模式下 b*颜色坐标的差异相关。
