Unverified90% confidenceFactTime unknown
含活性炭的牙粉主要靠物理吸附和研磨去除表面色渍，对咖啡/茶/烟渍等外源性着色有效，但对四环素牙、氟斑牙等内源性变色几乎无效
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90%
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Long-term
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Unverified活性炭成分有一定吸附表面色素能力，对茶渍、咖啡渍等外源性着色有轻度改善，但对内源性牙齿发黄基本无效91% similarUnverified活性炭的吸附增白只对外源性色素（茶渍、烟渍、咖啡渍）有效，对四环素牙、氟斑牙等内源性变色完全无效，这类情况应选冷光美白或贴面而非牙膏88% similarUnverified对四环素牙、氟斑牙等内源性着色基本无效，仅对外源性色素（咖啡、茶渍、烟渍）有一定改善作用80% similarUnverified对茶渍、咖啡渍等外源性色素有一定去除效果，但对四环素牙、氟斑牙等内源性着色基本无效79% similarUnverified小苏打（碳酸氢钠）成分的抛光粉靠弱碱性中和口腔酸性+轻度物理摩擦去色，比活性炭对牙釉质更温和，适合每周2-3次；活性炭主要靠吸附和研磨，去色更快但颗粒不均风险高78% similar
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