Decoding dental numbering system


Don’t understand tooth numbering on your dental treatment plan? We help you to encode the mysterious notation.

The  two digit ISO dental numbering system by the World Health Organization is a notation used by dental professionals to associate necessary dental information to a specific tooth.

ISO tooth numbering system

The designation “left” and “right” on the figure refers to the patient’s left and right. Orientation of  tooth numbering chart is “dentist’s view”, i.e. patient’s right corresponds to tooth chart’s left side.