[KongchangAI]
Unverified88% confidenceDecision RuleTime unknown

声波式牙刷(振动8000-40000次/分)依靠高频振动带动流体清洁,牙龈刺激小;旋转式(如欧乐B圆头)依靠机械摩擦,除菌斑效率高但对牙龈萎缩、敏感人群刺激较大,牙龈退缩者优先选声波

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88%
Confidence
Long-term
Relevance
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