[KongchangAI]
Unverified88% confidenceDecision RuleTime unknown

3-6岁幼儿应选振动频率≤16000次/分钟的低频段声波牙刷,7岁以上可用20000-31000次/分钟;成人款普遍31000+次/分钟对儿童牙釉质刺激过强

1
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88%
Confidence
Long-term
Relevance
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