The modified triadan system is a scheme of
dental nomenclature that can be used widely across different animal
species. It is used worldwide among
veterinary surgeons.
Each
tooth is given a three digit number.
The first number relates to the quadrant of the mouth in which the tooth lies:
# upper right
# upper left
# lower left
# lower right
If it is a deciduous tooth that is being referred to, then a different number is used:
- upper right
- upper left
- lower left
- lower right
The second and third numbers refer to the location of the tooth from front to back (or
rostral
Rostral may refer to:
Anatomy
* Rostral (anatomical term), situated toward the oral or nasal region
* Rostral bone, in ceratopsian dinosaurs
* Rostral organ, of certain fish
* Rostral scale, in snakes and scaled reptiles
Other uses
* Rostral colu ...
to
caudal
Caudal may refer to:
Anatomy
* Caudal (anatomical term) (from Latin ''cauda''; tail), used to describe how close something is to the trailing end of an organism
* Caudal artery, the portion of the dorsal aorta of a vertebrate that passes into the ...
). This starts at 01 and goes up to 11 for many species, depending on the total number of teeth.
References
*
* {{cite web , title=Modified triadan system: tooth numbering in the dog , url=https://www.rvc.ac.uk/Review/Dentistry/Basics/triadan/dog.html , publisher=eMedia Unit RVC , accessdate=2018-12-04 , date=2002
Mammal anatomy
Horse anatomy
Zoology