FDI World Dental Federation Notation - How The Codes Are Constructed

How The Codes Are Constructed

Syntax:

Sometimes a dot is inserted between quadrant code and tooth code in order to avoid ambiguity with other numbering systems.


Quadrant codes
1 upper right permanent teeth
2 upper left permanent teeth
3 lower left permanent teeth
4 lower right permanent teeth
5 upper right deciduous teeth
6 upper left deciduous teeth
7 lower left deciduous teeth
8 lower right deciduous teeth
Tooth codes
1 central incisors
2 lateral incisors
3 canines
4 1st premolars (permanent teeth) / 1st molar (deciduous teeth)
5 2nd premolars (permanent teeth) / 2nd molar (deciduous teeth)
6 1st molars (permanent teeth)
7 2nd molars (permanent teeth)
8 3rd molars (permanent teeth)

Examples:

  • "13" = permanent upper right canine
  • "32" = permanent lower left lateral incisor

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