[KongchangAI]
Unverified80% confidenceTradeoffTime unknown

金属芯外包橡胶涂层,比纯金属芯对牙釉质和牙龈刺激小,但与纯尼龙/硅胶刷相比仍偏硬,牙龈敏感者可能仍感不适

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80%
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Long-term
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