We just learned about Dental Notation - ISO.
Another type of Dental Notation is Palmer Notation.
This uses the same idea where the number starts at the front and goes backward, but it also uses a little L shaped or corner shaped symbol (┘└ ┐┌) to show which part of the mouth the tooth is in.
So if a dentist wants to talk about the 4th tooth in the upper right part of the mouth, they would use 4┘
(from: wikipedia - palmer notation)
Kid Facts - Blast from the past: Ligament