DENTITION
In both the upper and lower jawbones of the newborn infant there are hidden away in snug little cavities two sets of tiny teeth; the first set, or milk teeth, and the second set, or permanent teeth. These rudimentary teeth grow as the baby grows and push their way up or down from the jawbones until they finally make their appearance through the gums. The milk teeth appear in a definite way and in five definite groups.
There should be no physical disturbance at the appearance of the teeth, which is a physiological process, and it is to be deplored that all of the ills of babyhood are laid upon the teeth with the careless remark: "Oh, its his teeth!" Many, many illnesses are neglected because our inexperienced mother has been told that she can expect "anything to happen when the baby is cutting its teeth." Now, it is true that the babies of many families do have trouble in cutting their teeth, but the majority of babies cut their teeth comfortably and the first knowledge anyone has of it is the appearance of the tooth itself. As the teeth push their way nearer the surface of the gums, there is a broadening and a hardening of the gums themselves, and it is the exception rather than the rule that the baby needs any help in cutting his teeth.
Usually by the time the baby is seven months old it has two central teeth on the lower jaw (the central incisors), which constitute the first group. The second group of teeth to appear is the four upper central teeth which are all through by the time the baby is twelve months old, and are often through at ten months. Then there is a pause of from one to three months before the next teeth appear—the four anterior molars. As these four anterior molars come in, the two lateral incisors appear on the lower jaw, which now gives us, by the time the baby is fourteen or fifteen months old, four central teeth upper, four central teeth lower, and the four anterior molars, which make twelve teeth.
Another pause of two or three months and then we get the four canine, which fill in the space between the first molars and the front teeth. The canine on the upper jaw are commonly known as the eye teeth, while the canine teeth on the lower jaw are spoken of as the stomach teeth. This brings us to the age of eighteen to twenty-four months, when there is still another pause of two or three months, after which time the big teeth or the four posterior molars appear, which completes the first set of twenty teeth—the milk teeth. When baby is twenty months old the milk teeth are often all in. The complete set should appear not later than the thirtieth month.
During the life of the milk teeth the child should be taken to the dentist at least once a year, better once in six months, for all defective teeth must be properly and promptly cared for. Inexpensive but sanitary fillings should be placed in all decayed teeth, for the roots of the first teeth are very soft and infection readily spreads to the jaws and the permanent teeth and serious trouble often begins thus early.
If dentition is seriously delayed, investigation should be started concerning the general condition of the child, for this delay often accompanies ill health.
When the child is six years old, the mother should be watchful, for it is at this time that the first permanent teeth appear just behind the last molar of the milk teeth. They do not replace any of the teeth present, and many times they come through and decay without receiving any attention. It is seldom necessary to assist these milk teeth as they come through the gum, and should the gums become highly colored and swollen it is not wise to lance them, for if the teeth are not ready to come through immediately, the gum only toughens the more and makes the real cutting still more painful.
This is the time to cut down the baby's food as well as to look for other digestive disturbances, for the number of stools may increase and vomiting may occur, and by reducing the quantity and quality of the food and encouraging abundant water drinking, much trouble may be avoided. Under no circumstances urge the baby to eat when he refuses his food, when the gums seem swollen and red during the teething time. You will find that he will enjoy orange juice, pineapple juice, or prune juice. All of these digestive symptoms are simply the result of "feeling bad," and if heavy food of his regular feeding is greatly diminished he will get along much better than if fed his regular allowance of food.