Unilever Oral Care, Quarry Road East, Bebington, Wirral CH63 3JW, UK.
Intertek Clinical Research Services, Elm House,Oaklands Office Park, Hooton, Cheshire CH66 7NZ, UK.
J Dent. 2017 Dec;67S:S29-S33. doi: 10.1016/j.jdent.2017.08.007. Epub 2017 Aug 19.
To investigate the effects of a silica-based whitening toothpaste containing blue covarine on the colour of restorations in extracted human teeth.
Human extracted teeth were mounted in acrylic resin. A cavity was cut into the enamel surface and the specimen restored with either glass ionomer or composite dental materials. Following 4 weeks storage in water, specimens were treated with either water, red wine or a toothpaste containing blue covarine (n=10) for 24h followed by brushing with a silica-based toothpaste. Specimens were imaged with a digital imaging system at baseline, after 24h treatment and after brushing with a silica-based toothpaste. CIELAB colour parameters were determined for the restoration and the whole specimen and overall mean colour changes calculated (ΔE). Baseline and post-brushing images were compared subjectively for overall stain and staining around the restoration margin.
Red wine produced the largest ΔE values for whole specimens and for all restoration materials and the largest subjective stain scores for whole specimens and restoration margins. The red wine stain was not completely removed by brushing with a silica-based toothpaste. Comparisons of the red wine group with either the blue covarine toothpaste group or the water group were of statistical significance for all parameters (ANOVA, Tukey-Kramer, p<0.05). Following brushing with the silica-based toothpaste, specimens from the blue covarine toothpaste group were not significantly different (p>0.05) to the water group, for all restoration material types.
Exaggerated treatment with a blue covarine containing toothpaste does not significantly affect the colour of the restoration or the restoration margin of the dental materials tested versus a water alone treatment.
The silica-based blue covarine containing toothpaste does not permanently stain the restorative materials tested or their margins.
研究含有蓝 Covarine 的硅基美白牙膏对人离体牙修复体颜色的影响。
将人离体牙固定在丙烯酸树脂中。在牙釉质表面切割一个腔，并使用玻璃离子或复合牙科材料进行修复。在水中储存 4 周后，将标本分别用清水、红酒或含蓝 Covarine 的牙膏（n=10）处理 24 小时，然后用硅基牙膏刷牙。在基线、24 小时处理后和用硅基牙膏刷牙后，用数字成像系统对标本进行成像。确定修复体和整个标本的 CIELAB 颜色参数，并计算总平均颜色变化（ΔE）。对整个标本和修复体边缘周围的总染色情况进行主观比较，比较基线和刷牙后的图像。
红酒对整个标本和所有修复材料的 ΔE 值最大，对整个标本和修复体边缘的主观染色评分最大。用硅基牙膏刷牙不能完全去除红酒污渍。与蓝 Covarine 牙膏组或清水组相比，红酒组的所有参数均有统计学意义（ANOVA、Tukey-Kramer，p<0.05）。用硅基牙膏刷牙后，与清水组相比，蓝 Covarine 牙膏组的标本在所有修复材料类型上均无显著差异（p>0.05）。
与单独用水处理相比，用含蓝 Covarine 的牙膏过度处理不会显著影响测试的牙科材料修复体的颜色或修复体边缘的颜色。
含硅基蓝 Covarine 的牙膏不会永久性染色测试的修复材料及其边缘。
