fluoride
mixes with
enamel
, the hard surface on teeth, to help prevent holes, or cavities, from forming.
A young man in Nebraska tries his hand at flossing in this file photo.
But young children often swallow toothpaste when they brush. The American Academy of
Pediatric
Dentistry notes that swallowing fluoridated toothpaste can cause problems. So young children should be carefully
supervised
when they brush their teeth. And only a small amount of fluoridated toothpaste, the size of a pea, should be used.
Parents often wonder what effect thumb sucking or sucking on a pacifier might have on their baby's teeth. Dental experts generally agree that this is fine early in life.
The American Academy of Family Physicians says most children stop sucking their thumb by the age of four. If it continues, the group advises parents to talk to their child's dentist or doctor. It could interfere with the correct development of permanent teeth.
Dentists say children should have their first dental visit at least by the time they are one year old. They say babies should be examined when their first teeth appear -- usually at around six months.
And that's the VOA Special English Health Report. You can read, listen and learn English with our programs at voaspecialenglish.com. I'm Karen Leggett.
难点词汇解释
infection [in'fekʃən]
最新
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25
2013-11-25