Unverified80% confidenceTradeoffTime unknown
线材越细（如0.05mm级细线）越易进入紧密牙缝但清洁效率低需多次拉动，粗线/含蜡宽扁线清洁面积大但牙缝紧时插不进，牙缝正常者选含蜡扁线兼顾顺滑与效率
1
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80%
Confidence
Long-term
Relevance
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Unverified线材越细（0.12-0.15mm）越易进紧牙缝但对宽牙缝清洁效率低；宽牙缝或牙缝食物嵌塞频繁者应选膨胀型/扁平宽线，比追求细线更实用92% similarUnverified线材越细清洁紧牙缝越顺滑但清洁面接触少去菌斑效率低；扁平膨胀型（进入干燥后遇唾液膨胀）线材兼顾细入缝与宽清洁，适合牙缝正常人群日常90% similarUnverified线材偏细偏柔韧，适合牙缝正常或偏紧的人群；牙缝较大者可能觉得清洁力不够，不如扁带型或粗线牙线90% 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90% similarUnverified牙缝较宽或牙龈退缩者应选膨胀型（扁平/海绵型）线材而非圆形细线，扁线接触面大清洁效率高；圆形细线更适合正常至紧密牙缝90% similar
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