Unit 2: Dental Formulas (Cram)

What are the two sets of teeth that develop in all domestic mammals?

1. Deciduous teeth (also called primary/baby)
2. Permanent teeth

True or false: There are more permanent teeth than there were deciduous teeth

True. Not all permanent teeth had a deciduous tooth precursor

What is wrong with this patient?

Retained deciduous teeth. Normally there is never the same tooth, in the same place, at the same time. This patient will require extractions

Why is Tofu's tooth grey?

The permanent tooth pressed on the roots of the deciduous tooth when it erupted. This cut off its nutrition, turning it grey

The teeth at the front of the mouth that are responsible for the prehension of food

Incisors (I)

The fang–like at the front of the mouth distal to the incisors. They are responsible for the grabbing and tearing of food

Canines (C)

The multi–cusped teeth just distal to the canines. Responsible for chewing the food

Premolars (P)

The name given to the upper 4th premolar in dogs and cats

Carnassial

The multi–cusped teeth distal to the premolars. Also used for the chewing of food

Molars (M)

What are the two teeth numbering systems?

1. Anatomical numering system
2. Triadan numbering system

What is the deciduous dental formula for dogs according to the anatomic numbering system?

2(Di3/3, Dc1/1, Dp3/3) = 28

What is the permanent dental formula for dogs according to the anatomic numbering system?

2(I3/3, C1/1, P4/4, M2/3) = 42

What is the deciduous dental formula for cats according to the anatomic numbering system?

2(Di3/3, Dc1/1, Dp3/2) = 26

What is the permanent dental formula for cats according to the anatomic numbering system?

2(I3/3, C1/1, P3/2, M1/1) = 30

What do the 4 quadrants indicate in the triadan system?

Remember: Work clockwise around a patient's head (imagining you're looking at the patient head on)

Quadrant 1– Upper right arcade
Quadrant 2 – Upper left arcade
Quadrant 3 – Lower left arcade
Quadrant 4 – Lower right arcade

Fill in the blank: When using the triadan numbering system it is useful to remember that the dog and cat canine and molar are always indicated by ___ and ___.

4, 9

Fill in the blank: By the time a puppy or kitten is ___ – ___ days old it should have all its deciduous teeth in

37 - 42

True or false: Half of all jaw problems is because of malpositioned deciduous teeth

True. This is why it is important to look for malpositioned teeth on examinations of puppies and kittens

At what age should most cats and dogs have all their permanent teeth in?

6 months

Write how you would indicate the fourth upper right premolar according to the anatomical numbering system

P⁴

Write how you would indicate the first lower left incisor according to the anatomical numbering system

₁I

Write how you would indicate the upper left canine according to the anatomical numbering system

¹C

Write how you would indicate the third lower right molar according to the anatomical numbering system

M₃