Ashcroft Alex T, Cox Trevor F, Joiner Andrew, Laucello Massimo, Philpotts Carole J, Spradbery Paul S, Sygrove Naomi J
Unilever Oral Care, Quarry Road East, Bebington, Wirral CH63 3JW, UK.
J Dent. 2008;36 Suppl 1:S26-31. doi: 10.1016/j.jdent.2008.02.007.
The aims of this study were to evaluate the effects of a novel silica-based blue covarine whitening toothpaste on the colour of anterior restoration materials.
Restoration materials (three glass ionomers, three resin composites) were cast into disks (10 mm diameter, 2 mm thick) using cylindrical moulds. Specimens were immersed in pooled whole saliva prior to exposure to staining materials via one of two protocols. CIELAB colour measurements were taken at baseline and after each stage of the procedures. In one protocol, specimens were brushed with 10 ml of 33% (w/w) silica whitening toothpaste containing blue covarine slurry in water four times, for 10 min each time, with control specimens being immersed in water or red wine for the same period. Disks were re-immersed in saliva for 2 h between cycles. In the other protocol, specimens were immersed in 20 ml of water, red wine or silica whitening toothpaste containing blue covarine slurry for 96 h with colour measurements being taken afterwards. The second protocol disks were then brushed for 2 min using a non-whitening silica paste and further colour measurements made. Colour differences were then calculated.
At the end of both protocols the disks treated with silica whitening toothpaste containing blue covarine were not significantly different from the water controls (p > 0.1) in contrast to those treated with red wine. Even prior to brushing in the second protocol, there was no significant staining from the new toothpaste compared to the water control (p > 0.1).
There was no significant staining by the silica whitening toothpaste containing blue covarine on any of these materials.
本研究旨在评估一种新型的基于二氧化硅的蓝色考瓦林美白牙膏对前牙修复材料颜色的影响。
使用圆柱形模具将修复材料（三种玻璃离子体、三种树脂复合材料）铸造成圆盘（直径10毫米，厚2毫米）。在通过两种方案之一暴露于染色材料之前，将标本浸入混合的全唾液中。在基线以及程序的每个阶段之后进行CIELAB颜色测量。在一种方案中，用10毫升含蓝色考瓦林浆液的33%（w/w）二氧化硅美白牙膏刷牙四次，每次10分钟，对照标本在相同时间段内浸入水中或红酒中。在每个循环之间，将圆盘重新浸入唾液中2小时。在另一种方案中，将标本浸入20毫升水、红酒或含蓝色考瓦林浆液的二氧化硅美白牙膏中96小时，之后进行颜色测量。然后使用非美白二氧化硅牙膏将第二种方案中的圆盘刷牙2分钟，并进一步进行颜色测量。随后计算颜色差异。
在两种方案结束时，与用红酒处理的圆盘相比，用含蓝色考瓦林的二氧化硅美白牙膏处理的圆盘与水对照相比无显著差异（p>0.1）。即使在第二种方案刷牙之前，与水对照相比，新牙膏也没有显著染色（p>0.1）。
含蓝色考瓦林的二氧化硅美白牙膏对这些材料中的任何一种都没有显著染色。
