Dental Short Hand

dentist looking at xrayDentists use a variety of numbering systems for tooth identification. The F.D.I. (Federation Dentaire International) system is one that is generally used worldwide. This system uses two number to identify each tooth and divides the mouth into four quadrants.

The second number indicates the tooth in each quadrant beginning at 1 for central incisors to 8 for wisdom teeth. The tooth notation for the 32 permanent teeth therefore is:

For the primary (baby) teeth, the quadrants are indicated as follows:

The tooth notation for the 20 deciduous teeth therefore is: