Every child has 20 milk teeth which fall out naturally to be replaced by a new set of adult teeth. Research has shown that milk teeth and wisdom teeth are a good source of mesenchymal stem cells. They can be obtained easily and cause no harm and loss to the individual as the milk teeth are lost naturally anyways. Because every child has 20 milk teeth, there are 20 chances to obtain viable stem cells. This is unique to dental stem cell banking. Wisdom teeth are frequently removed when they cause problems. Every adult has 4 wisdom teeth, hence 4 chances to bank stem cells. Unlike embryonic stem cells, dental stem cell banking is ethical and perfectly legal. Once stem cells are obtained from teeth they can be cryo preserved for many years to retain their regenerative potential. The individual can use them when ever required. They are his/her own stem cells, hence a perfect match.