Superseded88% confidenceCautionTime unknown
牙齿严重色素沉着（四环素牙、氟斑牙）不建议依赖美白牙膏，其只能去除外源性着色，内源性变色需口腔科冷光美白或贴面处理
1
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88%
Confidence
Long-term
Relevance
-
First Seen
This knowledge claim has been superseded by newer content
美白牙擦本质是靠物理摩擦（含微磨料如三聚磷酸钠或硅胶颗粒）擦除牙齿表面着色，只能去除外源性色渍（茶渍、烟渍、咖啡渍），对牙齿内源性发黄（四环素牙、氟斑牙、天生偏黄）完全无效Sources
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