[KongchangAI]
Unverified90% confidenceDecision RuleTime unknown

声波式(磁悬浮驱动)振动频率31000-42000次/分钟,清洁靠高频水流震荡,对牙龈刺激小;旋转式(欧乐B为代表)转速约8800次/分钟叠加脉冲,机械摩擦去渍力更强但对牙龈刺激较大,牙龈萎缩或敏感者优先选声波式

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