Unverified80% confidenceDecision RuleTime unknown
研磨颗粒的RDA（相对牙本质磨损值）应低于100，过高会磨损牙釉质；洁牙片中若含碳酸钙、水合硅石等中低磨损剂较安全，含小苏打（碳酸氢钠）则相对温和
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80%
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Long-term
Relevance
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Unverified清洁力（去牙菌斑）越强的牙膏摩擦剂RDA值越高，但RDA过高（>100）会磨损暴露的牙根，牙龈萎缩者应选RDA中低（≤70）的温和配方89% similarUnverified含研磨剂（如水合硅石、碳酸钙）颗粒的泡腾片RDA（相对牙本质磨损值）若标注超过100，不适合牙颈部楔状缺损或已有牙龈萎缩者，会加速根面磨损87% similarUnverified研磨剂（RDA值）越低对乳牙珐琅质越温和，儿童牙膏应选RDA≤50的低磨损配方，含二氧化硅、碳酸钙软性磨料，避免成人牙膏常见的高RDA美白配方86% similarUnverified研磨剂RDA值（相对牙本质磨损值）应低于100为安全，敏感牙齿或牙釉质薄者建议选RDA<70的低摩擦配方；抗菌牙膏若同时主打美白往往RDA偏高，二者难兼得86% similarUnverified牙龈萎缩、牙根暴露人群应选不含研磨剂或RDA值低于70的温和型牙龈膏，高研磨剂会加速磨损暴露的牙根面（牙本质硬度远低于牙釉质）85% similar
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