The average three-year old child should have twenty deciduousor baby teeth. He should have six teeth at the end of his first year, twelve when eighteen months old, sixteen when he is two, and all twenty by the time he is two and half years of age.

If during pregnancy his mother’s diet lack calcium, there may be some delay in this time that his teeth push their way through the gums. Disease such as syphilis will also interfere with the normal development and appearance of teeth.

In adult there are thirty-two permanent teeth. The first of these begin to come through when a child is six or seven years old. This permanent teeth, growing in from below, usually push out the decidouous or baby teeth. By the time person is twenty five he should have all his teeth.

How good this teeth are will largely depend on his diet. Also, how much sugar he has been allowed to have, and the kind of care he has given the teeth during his growing years are of great importance.