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本文对食用氟化食盐２至３年后停用１至４年儿童的第一恒磨牙患龋情况进行了追踪观察。结果表明：应用氟盐组儿童在停用氟盐２年内其息龋率、龋均、龋面均比相应对照组低，而停用氟盐３年后其防龋效果仍能着到趋势，但无显著性差异。全体受试者均未出现氟牙症。提示停用氟化食盐２年后应增加其他防龋措施。
In this paper, the first permanent molar dental caries in children who have been disabled for 1 to 4 years after taking fluoride salt two to three years was followed up. The results showed that children with fluoride group had less caries rate, caries per caries and caries than those of the corresponding control group within 2 years after deactivation of fluoride salt. However, after 3 years of disabled fluoride salt, the caries prevention effect could still reach the trend. But no significant difference. All subjects did not show dental fluorosis. Prompted to disable fluoride salt 2 years after the addition of other anti-caries measures.