FDI World Dental Federation notation (also "FDI notation" or "ISO 3950 notation") is the world's most commonly useddental notation (tooth numbering system).[1][2] It is designated by theInternational Organization for Standardization as standardISO 3950 "Dentistry — Designation system for teeth and areas of the oral cavity".[3]
The system is developed by theFDI World Dental Federation. It is also used by theWorld Health Organization, and is used in most countries of the world except theUnited States (which uses theUNS).
The system uses two numbers to define each tooth. One to specify the quadrant, and one to specify the tooth within that quadrant.
Orientation of the chart is traditionally "dentist's view", i.e. patient's right corresponds to notation chart left. The designations "left" and "right" on the chart below correspond to the patient's left and right.
| Permanent teeth | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| patient's upper right | patient's upper left | ||||||||||||||
| 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| patient's lower right | patient's lower left | ||||||||||||||
| 48 | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 |
| Deciduous teeth (baby teeth) | |||||||||||||||
| upper right | upper left | ||||||||||||||
| 55 | 54 | 53 | 52 | 51 | 61 | 62 | 63 | 64 | 65 | ||||||
| lower right | lower left | ||||||||||||||
| 85 | 84 | 83 | 82 | 81 | 71 | 72 | 73 | 74 | 75 | ||||||
Codes, names, and usual number of roots: (see chart of teeth atUniversal Numbering System)
The syntax is the quadrant code followed by the tooth code. Sometimes a dot is inserted between the quadrant code and tooth code in order to avoid ambiguity with other numbering systems, especially theUNS.
| 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 |
| This is set by going clockwise from the dentist's view. | |
| 1 | central incisors |
| 2 | lateral incisors |
| 3 | canines / cuspids |
| 4 | 1st premolars / bicuspids (permanent teeth) / 1st molar (deciduous teeth) |
| 5 | 2nd premolars / bicuspids (permanent teeth) / 2nd molar (deciduous teeth) |
| 6 | 1st molars (permanent teeth) |
| 7 | 2nd molars (permanent teeth) |
| 8 | 3rd molars / wisdom teeth (permanent teeth) |
| This is defined by counting from the center outward. | |
Examples:
