Objective To longitudinally observe the preventive effect of pit and fissure sealants,fluorogel,fluorinated foam,and oral health instruct(OHI) on preventing caries in the first permanent molar of the second grade children(7 to 8 years old) in Quanzhou,so as to find the best method for preventing the first permanent molar caries prevention in schools. Methods Totally 1 768 second-grade children in 5 schools were selected by cluster random sampling method in Quanzhou city area in 2017 to check the eruption of the first permanent molar and caries. Students in five schools were divided into five groups,including control group(n=313),OHI group(n=421),fluoride protective paint group(n=267),fluoride-containing foam group(n=438) and pit and fissure sealing group(n=329) . The anti-caries effects of five primary schools were compared in two years. Results Finally 1 748 children from five primary schools completed the two-year observational study,and the follow-up rate was 98.87%. After two-year intervention,new decayed, missing of filled teeth(DMFT) and new decayed, missing of filled surface(DMFS) in fluoride protective paint group were higher than those in other four groups,which were lowest in pit and fissure sealing group,and the difference was significant(P<0.05). Conclusion The four preventive methods have different effects on the prevention of caries on the first permanent molars of children aged 7 to 8 years,of which pit and fissure sealing has the best effect.
Key words
first permanent molar /
pit and fissure sealing /
caries prevention /
longitudinal study
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