Unverified90% confidenceDecision RuleTime unknown
牙缝紧密（正畸后或天生牙列拥挤）应选含蜡或PTFE材质牙线，直径≤0.4mm，无蜡尼龙线易在紧牙缝卡断残留纤维
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90%
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Long-term
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Unverified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93% similarUnverified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92% similarUnverified牙缝紧密（正畸或牙齿排列拥挤）优先选含蜡（waxed）细线，直径约0.4-0.5mm，蜡质涂层降低摩擦更易滑入，不易卡断；牙缝宽者可选膨胀型无蜡线或PTFE材质92% 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92% 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91% similar
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