A child's primary teeth, sometimes called "baby teeth," are as important as the permanent adult teeth. Primary teeth typically begin to appear when a baby is between age 6 months and 1 year. Primary teeth help children chew and speak. They also hold space in the jaws for permanent teeth that are growing under the gums.
The ADA recommends that a dentist examine a child within six months after the first tooth comes in and no later than the first birthday. A dental visit at an early age is a "well-baby checkup" for the teeth. Besides checking for tooth decay and other problems, the dentist can show you how to clean the child's teeth properly and how to evaluate any adverse habits such as thumbsucking.
When teeth first come in, some babies may have sore or tender gums. Gently rubbing your child's gums with a clean finger, a small, cool spoon or a wet gauze pad can be soothing. You can also give the baby a clean teething ring to chew on. If your child is still cranky and in pain, consult your dentist or physician. Most children have a full set of 20 primary teeth by the time they are 3.