Unverified85% confidenceDecision RuleTime unknown
乳牙牙缝普遍较紧密，应选择线径0.10-0.15mm的超细扁线（PTFE/特氟龙材质），普通成人牙线较粗易卡在乳牙间难以拉出
1
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85%
Confidence
Long-term
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Unverified牙缝紧密者（正常/挤压式牙缝）应选含蜡牙线或PTFE线材，直径0.05mm以下更易滑入，无蜡线在紧牙缝易起毛断裂93% similarUnverified牙缝紧密（正常/拥挤牙列）应选PTFE（特氟龙/膨体）材质超细牙线，直径≤0.5mm且截面扁平，尼龙线易卡断残留；牙缝较大或有牙周袋人群应选膨胀型（Expanding）牙线或牙线+牙缝刷组合91% similarUnverified儿童牙缝普遍较窄，应选择线径≤0.5mm的超细牙线或膨胀型（PTFE）牙线，普通蜡质牙线线径0.6-0.8mm易卡顿并把邻面推开91% similarUnverified牙缝较小或牙齿排列紧密（正畸后/天生密集）应选PTFE（特氟龙）单丝线材，直径0.05mm以下且不易毛刺卡断；避免蜡质尼龙膨体线，后者遇窄缝易卡顿断丝90% similarUnverified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89% similar
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