Unverified82% confidenceDecision RuleTime unknown
牙缝紧密（正畸后或天生牙列拥挤）应选未膨胀直径≤0.3mm的超细超导膜线，膨胀倍数控制在2-3倍即可，膨胀倍数过高会导致进不去或强行拉扯损伤牙龈乳头
1
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82%
Confidence
Long-term
Relevance
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Unverified牙缝紧密（正畸后或天生牙齿排列紧）应选含蜡牙线或超细PTFE牙线（线径≤0.05mm级别），无蜡棉线在紧牙缝中易起毛卡断87% similarUnverified牙签直径越细剔牙越贴合牙缝但越易折断，越粗越结实但可能撑大牙缝损伤牙龈乳头；日常剔牙选2mm左右，牙缝较宽者可选2.5mm或改用牙线87% similarUnverified牙缝宽度不足0.4mm或牙齿排列极其紧密者不建议强行使用牙间刷，应改用牙线，强行插入会损伤牙龈乳头造成牙缝变大85% similarUnverified膨胀型（expanding/spongy）牙线遇唾液会变蓬松，适合牙缝宽或牙龈退缩人群清洁较大间隙，但对紧密牙缝反而难以进入85% similarUnverified线径细（约0.15mm以下）的牙线棒更易滑入紧密牙缝，但清洁牙面接触面小；线径粗或膨胀型（遇水膨胀）清洁效率高但牙缝紧者会卡住难拉出84% similar
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