Wisdom teeth is the common name for 3rd molars. We are biologically programmed to have three molars in each quadrant. However, Wisdom teeth or 3rd molars are one of the most commonly congenitally...
You need 2 sets of teeth because your "baby" primary teeth fall out around age 30. People until this day have 1 or 2 primary teeth and just receive a implant to fix it. That's why we have secondary...
Adult-sized teeth are too large for little baby-heads. Baby-sized teeth are frightfully small on adult-heads. Practice. To give the tooth fairy meaningful employment. You mean you only got two?