Rantala E V
Community Dent Oral Epidemiol. 1979 Aug;7(4):213-7. doi: 10.1111/j.1600-0528.1979.tb01218.x.
A total of 1345 elementary schoolchildren from grades 1-3 (aged 7-9 years) were examined and treated by community health center dentists during 1975-1977. The combined effect of fissure sealing and topical fluoride therapy with 2% NaF gel resulted over the 2 years in an increase in the proportion of caries-free permanent first molars from 50% to 81% in the 1st grade. The mean DMFS scored from the same teeth decreased from 2.8 to 0.8. In the age group born in 1968 the increment of new carious surfaces was 0.28 DFS/year with sealing and 1.13 DFS/year without.
1975年至1977年期间，社区卫生中心的牙医对1345名1至3年级（7至9岁）的小学生进行了检查和治疗。在两年时间里，窝沟封闭与2%氟化钠凝胶局部用氟疗法相结合，使一年级无龋恒第一磨牙的比例从50%提高到了81%。同一组牙齿的平均龋失补牙面数（DMFS）从2.8降至0.8。在1968年出生的年龄组中，进行窝沟封闭的新龋面增量为每年0.28个龋面（DFS），未进行窝沟封闭的为每年1.13个龋面（DFS）。
