School of Dentistry, Potiguar University (Laureate International Universities), Natal, Brazil.
Acta Odontol Scand. 2012 Jul;70(4):337-43. doi: 10.3109/00016357.2011.654261. Epub 2012 Feb 9.
This study evaluated the impact of bleaching teeth using blends of a CPP-ACP paste (MI Paste; MI) and carbamide/hydrogen peroxides in different proportions on surface properties of bleached enamel.
Ninety bovine incisors were bleached with 7.5% hydrogen peroxide (HP), 16% carbamide peroxide (CP), MI and blends of HP or CP:MI at three proportions (1:1, 2:1, 1:2). Hardness and roughness were measured at baseline and after bleaching. Enamel morphology was evaluated by Scanning Electron Microscopy (SEM). The data were analyzed by two-way ANOVA for repeated measurements and Tukey's test.
Most of the samples bleached with MI in combination with peroxides presented increased hardness and roughness which were associated to mineral deposition, as observed by SEM images. Blends with higher fractions of MI did not offer superior benefits.
The use of a CPP-ACP paste mixed to carbamide/hydrogen peroxides can decrease adverse side-effects from tooth bleaching on an enamel surface.
本研究评估了使用 CPP-ACP 糊剂（MI Paste；MI）和不同比例的脲基/过氧化物混合物对漂白牙釉质表面性能的影响。
90 颗牛切牙用 7.5%过氧化氢（HP）、16%过氧化脲（CP）、MI 以及 HP 或 CP:MI 的三种比例（1:1、2:1、1:2）混合物进行漂白。在漂白前后测量硬度和粗糙度。用扫描电子显微镜（SEM）评估牙釉质形态。采用重复测量的双因素方差分析和 Tukey 检验对数据进行分析。
用 MI 与过氧化物联合漂白的大多数样本硬度和粗糙度增加，SEM 图像显示这与矿物质沉积有关。含有较高 MI 比例的混合物并没有带来更好的效果。
在牙釉质表面，使用 CPP-ACP 糊剂与脲基/过氧化物混合使用可以减少牙齿漂白的不良反应。
