[KongchangAI]
Unverified85% confidenceTradeoffTime unknown

美白强度与牙釉质安全性成反比:见效快(1-2周明显)的洁牙粉往往RDA偏高或含过硬颗粒,长期依赖会造成不可逆磨损;温和型需持续使用4-6周才见效但可长期用

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85%
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Long-term
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