OBJECTIVE:This study was to investigate the accidental swallowing of fluoride toothpastes in young children during their toothbrushing and then to discuss the security of fluoride toothpastes used by young children.METHODS:The accidental ingesting of fluoride toothpastes in 180 young children aged 3-6 years old was assayed with fluoride-specific electrode.RESULTS:Among the 180 children invited to join the test,the average amount of the ingestion of fluoride toothpastes was 0.053g.The average swallowing ratio was 26.163%.The maximums presented in the group aged 3.0 to 3.9years old were 0.082g and 30.348%;respectively.CONCLUSION:Young children swallow a quantity of toothpaste on the brush during toothbrushing inevitably.It may result in the excessive daily fluoride ingestion which includes the fluoride ingestion from toothpaste,food and surroundings.So the incidence of fluorosis will increase certainly.