Question: what are the tooth numbers?
Answer: The first thing to realize is dentists use a two-digit numbering system. So the upper right teeth begin with the number “1” (i.e. 11), the upper left teeth begin with the number “2” (i.e. 21), the lower left teeth begin with the number “3” (i.e. 31), and the lower right teeth begin with the number “4” (i.e. 41).