Throughout your life you will have two sets of teeth: primary or "baby" teeth, and secondary or permanent teeth. At age six to eight months, the primary teeth appear; all 20 are in place by age three.
Permanent teeth will begin to grow around age six, and except for wisdom teeth, are all present between ages twelve and fourteen. The next teeth to grow in are the twelve-year molars, and finally the wisdom teeth. Wisdom teeth typically begin breaking through from age seventeen and on. The total number of permanent teeth is 32, though few people have room for all 32 teeth. This is why wisdom teeth are usually removed.
The front teeth are called incisors, the sharp "fang" teeth are canines; the next side teeth are referred to as pre-molars or bicuspids and the back teeth are molars. The second set of teeth are the ones we keep for life, so it is vital that they are brushed and flossed regularly and that periodic check-ups by a dentist are followed.