The first primary teeth to begin to erupt through the gums are the two bottom front teeth. You will notice this when your baby is about 6-10 months old. Next to follow will be the 4 upper front teeth and the remainder of your baby's teeth will appear periodically. They will usually appear in pairs along the sides of the jaw until the child is about 2 1/2 years old. At around 2 1/2 years old your child should have all 20 teeth.
Between the ages of 5 and 6 the first permanent teeth will begin to erupt. This process can continue until approximately age 21 if you count wisdom teeth.
Adults have 28 permanent teeth, or up to 32 if you include third molars (or wisdom teeth).
Baby teeth are important as they not only hold space for permanent teeth but they are important to chewing, biting, speech and appearance.
For this reason it is important to maintain a healthy diet and daily hygiene.