[KongchangAI]
Unverified90% confidenceDecision RuleTime unknown

声波式(振动式)牙刷每分钟31000-42000次振动,靠高频微震+流体动力清洁,对牙龈更温和;旋转式(如欧乐B圆头)靠机械旋转刮除,单点清洁力强但对牙龈刺激更大。牙龈敏感或有牙龈萎缩者优先选声波式

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