Dental sealants are used to protect the chewing surfaces of back teeth from decay. They are acrylic-like substances which create a barrier against the bacteria which are always in the mouth and always depositing acid excretions on the teeth and gums. Sealants bond to the tooth enamel and cover all the tiny fissures and pits where bacteria would otherwise settle and thrive.
At what age do babies walk? Most babies take their first steps sometime between 9 and 12 months and are walking well by the time they're 14 or 15 months old. Don't worry if your child takes a little longer, though. Some perfectly normal children don't walk until they're 16 or 17 months old.
By the time he is around 8 months, he will start learning how to stand. He will try to pull himself upright by holding on to furniture. The normal age range when a child starts walking is 9 to 15 months, and most children start walking just after the age of one - between 13 to 14 months. So if your 14 month child cannot walk, but can crawl, sit, stand, there is no cause for concern.