[KongchangAI]
Unverified90% confidenceTradeoffTime unknown

声波式牙刷(振动频率31000-40000次/分钟)通过高频摆动带动液体清洁,对牙龈刺激小,适合牙龈敏感人群;旋转式(如欧乐B圆形刷头,8800次/分钟旋转+超声脉动)单齿包裹式清洁除菌斑效率更高,但对牙龈萎缩者易造成刺激

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