Unverified85% confidenceDecision RuleTime unknown
膨胀型（PTFE/膨体）牙线遇水膨胀，适合牙缝较大或牙龈萎缩人群，牙缝紧密者应选UHMWPE高强度细线（直径≤0.15mm）避免塞不进
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85%
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Long-term
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Unverified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88% similarUnverified牙缝正常或偏窄者选PTFE（特氟龙）膨体线，不易起毛断裂；牙缝较大者选膨胀式尼龙线（如含蜡海绵线），进缝后膨胀更贴合清洁面87% similarUnverified膨胀型（PTFE或海绵状）牙线遇唾液后变宽，清洁面积大且不易嵌塞，适合牙缝较宽者；但穿过紧密接触点较困难86% similarUnverified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86% 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85% similar
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