View source for FDI World Dental Federation notation

{{Short description|World's most commonly used dental notation}}
{{for|the crystallographic notation system|Hermann–Mauguin notation}}
[[File:Teeth model front FDI Notation.jpg|thumb|FDI Notation, teeth's quadrants]]
'''FDI World Dental Federation notation''' (also "FDI notation" or "ISO 3950 notation") is the world's most commonly used [[dental notation]] (tooth numbering system).<ref>[http://www.fdiworldental.org/resources/5_0notation.html FDI Two-Digit Notation] {{webarchive|url=https://web.archive.org/web/20070401074213/http://www.fdiworldental.org/resources/5_0notation.html |date=2007-04-01 }}, hosted on the [http://www.fdiworldental.org FDI World dental Federation] {{Webarchive|url=https://web.archive.org/web/20070718012337/http://www.fdiworldental.org/ |date=2007-07-18 }} website.  Page accessed April 1, 2007.</ref><ref>{{Cite web |last=ISO (International Organization for Standardization) |title=ISO 3950:2016 |url=https://www.iso.org/standard/68292.html |access-date=2023-03-10 |website=ISO 3950:2016 Dentistry — Designation system for teeth and areas of the oral cavity |language=en}}</ref> It is designated by the [[International Organization for Standardization]] as standard '''ISO 3950''' "Dentistry — Designation system for teeth and areas of the oral cavity".<ref>[https://www.iso.org/standard/68292.html ISO 3950:2016 ''Dentistry &mdash; Designation system for teeth and areas of the oral cavity'']</ref>

The system is developed by the [[FDI World Dental Federation]]. It is also used by the [[World Health Organization]], and is used in most countries of the world except the [[United States]] (which uses the [[Universal numbering system (dental)|UNS]]).

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.

==Table of codes==
[[File:Impacted wisdom teeth.jpg|thumb|upright=2.0|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.]]

{| class="wikitable" 
|+ FDI two-digit notation
|-
! colspan=16 align="center"| [[Permanent teeth]]
|-
! colspan=8 align="center"| patient's upper right !! colspan=8 align="center"| patient's upper left
|-
|18||17||16||15||14||13||12||11||21||22||23||24||25||26||27||28
|-
! colspan="8" align="center" | patient's lower right !! colspan="8" align="center" | patient's lower left
|-
|48||47||46||45||44||43||42||41||31||32||33||34||35||36||37||38
|-
| colspan=16 align="center"|
|-
! colspan=16 align="center"| [[Deciduous teeth]] (baby teeth)
|-
! colspan=8 align="center"| upper right !! colspan=8 align="center"| upper left
|-
| || || ||55||54||53||52||51||61||62||63||64||65|| || || 
|-
! colspan="8" align="center" | lower right !! colspan="8" align="center" | lower left
|-
| || || ||85||84||83||82||81||71||72||73||74||75|| || || 
|}

{{comparison_of_dental_notations.svg}}
Codes, names, and usual number of roots: (see chart of teeth at [[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
<gallery mode="packed">
File:Zahnschema OK 1.jpg|ISO notation upper jaw (wisdom teeth removed)
File:Zahneschema UK 1.jpg|ISO notation lower jaw (wisdom teeth removed)
File:Primary dentition.jpg|ISO notation primary teeth
</gallery>

==How the codes are constructed==

''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 the [[Universal numbering system (dental)|UNS]].''

{{columns-start}}
{| class="wikitable" 
|+ 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
|-
|colspan=2|This is set by going clockwise from the dentist's view.
|}
{{column}}
{| class="wikitable"
|+ Tooth codes
|-
|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)
|-
|colspan=2|This is defined by counting from the center outward.
|}
{{columns-end}}

Examples:
*"13" = permanent upper right, 3rd tooth (canine / cuspid)
*"32" = permanent lower left, 2nd tooth (lateral incisor)

==See also==
* [[Dental notation]]
* [[Universal numbering system (dental)|Universal numbering system]]
* [[Palmer notation]]

==References==
{{reflist}}

==External links==
*[http://www.drbunn.com/faq/tooth-numbering Dr.Bunn page on dental notations].
* https://www.youtube.com/watch?v=ea7lC42BVA8
{{ISO standards}}

[[Category:Dentistry terminology|.]]
[[Category:Human mouth anatomy|*]]
[[Category:ISO standards]]