FDI World Dental Federation notation

For crystallographic notation system, see Hermann–Mauguin notation.

FDI World Dental Federation notation is widely used by dentists internationally to associate information to a specific tooth.

Developed by the FDI World Dental Federation, World Dental Federation notation is also known as ISO 3950 notation.

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.

Table of codes

X-ray of the teeth and jaw showing the normal permanent teeth. The last two teeth on the patient's left (the dentist's right), 28 and 38 - the maxillary and mandibular third molars (popularly the upper and lower wisdom teeth) are severely impacted.

FDI two-digit notation

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
48	47	46	45	44	43	42	41	31	32	33	34	35	36	37	38
patient's lower right								patient's lower left
Deciduous teeth (baby teeth)
upper right								upper left
			55	54	53	52	51	61	62	63	64	65
			85	84	83	82	81	71	72	73	74	75
lower right								lower left

Codes, names, and usual number of roots: (see chart of teeth at Wikipedia entry: Universal Numbering System)

• 11 21 51 61 maxillary central incisor 1
• 41 31 81 71 mandibular central incisor 1

• 12 22 52 62 maxillary lateral incisor 1
• 42 32 82 72 mandibular lateral incisor 1

• 13 23 53 63 maxillary canine 1
• 43 33 83 73 mandibular canine 1

• 14 24 maxillary first premolar 2
• 44 34 mandibular first premolar 1

• 15 25 maxillary second premolar 1
• 45 35 mandibular second premolar 1

• 16 26 54 64 maxillary first molar 3
• 46 36 84 74 mandibular first molar 2

• 17 27 55 65 maxillary second molar 3
• 47 37 85 75 mandibular second molar 2

• 18 28 maxillary third molar 3
• 48 38 mandibular third molar 2

How the codes are constructed

Syntax: <quadrant code><tooth code>

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

See also

• Dental notation
• Universal numbering system
• Palmer notation

External links

• Dr.Bunn page on dental notations.

• FDI Two-Digit Notation, hosted on the FDI World dental Federation website. Page accessed April 1, 2007.
• ISO 3950:2009 Dentistry — Designation system for teeth and areas of the oral cavity