Modified triadan system
Encyclopedia
The Modified Triadan System is a scheme of dental
nomenculature that can be used widely across different animal species
. It has now gained wide acceptance and is used worldwide among veterinary surgeon
s.
Each tooth
is given a three digit number.
The first number relates to the quadrant of the mouth in which the tooth lies.
If it is a deciduous tooth that is being referred to then a different number is used as below.
The second and third numbers refer to the location of the tooth from front to back (or rostral to caudal).
This starts at 01 and goes up to 11 for many species depending on the total number of teeth.
For diagrams of the modified triadan system in dog
s see http://www.rvc.ac.uk/Review/Dentistry/Basics/triadan/dog.html.
Below is a diagram of the modified triadan system in horse
s.
Tooth
Teeth are small, calcified, whitish structures found in the jaws of many vertebrates that are used to break down food. Some animals, particularly carnivores, also use teeth for hunting or for defensive purposes. The roots of teeth are embedded in the Mandible bone or the Maxillary bone and are...
nomenculature that can be used widely across different animal species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
. It has now gained wide acceptance and is used worldwide among veterinary surgeon
Veterinary surgeon
Veterinary surgeon is a term used to describe:*The full title of a vet, who treats disease, disorder and injury in animals, in the United Kingdom and several Commonwealth countries**See also Veterinary medicine in the United Kingdom...
s.
Each tooth
Tooth
Teeth are small, calcified, whitish structures found in the jaws of many vertebrates that are used to break down food. Some animals, particularly carnivores, also use teeth for hunting or for defensive purposes. The roots of teeth are embedded in the Mandible bone or the Maxillary bone and are...
is given a three digit number.
The first number relates to the quadrant of the mouth in which the tooth lies.
- Upper Right: 1
- Upper Left: 2
- Lower Left: 3
- Lower Right: 4
If it is a deciduous tooth that is being referred to then a different number is used as below.
- Upper Right: 5
- Upper Left: 6
- Lower Left: 7
- Lower Right: 8
The second and third numbers refer to the location of the tooth from front to back (or rostral to caudal).
This starts at 01 and goes up to 11 for many species depending on the total number of teeth.
For diagrams of the modified triadan system in dog
Dog
The domestic dog is a domesticated form of the gray wolf, a member of the Canidae family of the order Carnivora. The term is used for both feral and pet varieties. The dog may have been the first animal to be domesticated, and has been the most widely kept working, hunting, and companion animal in...
s see http://www.rvc.ac.uk/Review/Dentistry/Basics/triadan/dog.html.
Below is a diagram of the modified triadan system in horse
Horse
The horse is one of two extant subspecies of Equus ferus, or the wild horse. It is a single-hooved mammal belonging to the taxonomic family Equidae. The horse has evolved over the past 45 to 55 million years from a small multi-toed creature into the large, single-toed animal of today...
s.