Dentition Flashcards
Characterize brachydont teeth.
a crown, neck, and well developed roots
What are the substances that brachydont teeth are made up of?
enamel, dentin, cement, pulp
What is the hardest substance in the body?
enamel
What teeth are brachydont teeth in the horse and the ruminant?
the incisors and canines in cow, and the first premolars and canine in the horse
Characterize hypsodont teeth.
teeth with a high crown and short roots
What substances are the hyposodont teeth made up of?
cement, enamel, dentin, pulp
What does it mean when a hyposodont tooth is in wear?
the tooth begins to wear off its enamel later after eruption through the gums
In the horse and ruminant, what are the hypsodant teeth?
the premolars and molars (except the first premolar in the horse)
What is the clinical tooth?
the part of the tooth that has erupted from the gum line
What is the anatomical tooth?
the whole tooth; erupted and not erupted
What are the surfaces of the teeth?
occlusal, mesial, distal, buccal, labial, and lingual
What is the occlusal surface of the tooth?
surfaces that touches the teeth on the opposite arcade
What is the mesial surface of the tooth?
the surface of the tooth that is closest to the midline
What is the distal surface of the tooth?
the surface of the tooth that is the furthest away from the midline
What is the buccal surface of the tooth?
the surface of the tooth that faces the cheek
What is the labial surface of the tooth?
the surface of the tooth that faces the lips
What is the lingual surface of the tooth?
the surface of the tooth that faces the tongue
In the horse, how do the buccal parts of both arcades interact?
the upper arcade overlaps the buccal part of the lower arcade
In the horse how do the lingual parts of both arcades interact?
the lingual part of the lower arcade overlaps the lingual part of the upper arcade
What is the deciduous dental formula of the feline?
Upper: 3-1-3 (no P1) Lower: 3-1-2 (no P1 or P2)
What is the permanent dental formula of the feline?
Upper: 3-1-3-1 (no P1) Lower: 3-1-2-1 (no P1 or P2)
What is the deciduous dental formula of the canine?
Upper: 3-1-3 (no P1) Lower: 3-1-3 (no P1)
What is the permanent dental formula of the canine?
Upper: 3-1-4-2 Lower: 3-1-4-3
What is the deciduous dental formula of the horse?
Upper: 3-0(1)-3 Lower: 3-0(1)-3
What is the permanent dental formula of the horse?
Upper: 3-1(0)-3(4)-3 Lower: 3-1(0)-3(4)-3
What is the deciduous dental formula of the ruminant?
Upper: 0-0-3 Lower: 3-1-3
What is the permanent dental formula of the ruminant?
Upper: 0-0-3-3 Lower: 3-1-3-3
Where is the canine located in the ruminant?
right next to I3, there is no diastema between the incisors and the canine
What is the deciduous dental formula of the pig?
Upper: 3-1-3 Lower: 3-1-3
What is the permanent dental formula of the pig?
Upper: 3-1-4-3 Lower: 3-1-4-3
How many total teeth do adult pigs have?
44
What is the male’s canine teeth known as and how long does it grow in the pig?
husk, it grows its entire life
How long does the female canine tooth grow in the pig?
for 2 years
Characterize canines in the horse.
they generally form in both sexes, but they are rudimentary and fail to erupt in mares
In male horses, if a canine erupts what does it look like and where do they sit?
low, laterally compressed cones within the diastemas closer to the incisors
How do the imbedded portions of the canine relate to the exposed part in the horse?
the imbedded portions are disproportionately large as compared to the exposed crowns
What is the wolf tooth?
the first premolar of the upper and lower arcade on the horse that often fails to develop; if it does then it is vestigial
What teeth are used for aging?
the lower incisors
Where does wear first occur on?
the labial edge
When does Galvyne’s groove appear and on what tooth (in the horse)?
between 10-30 years on the third upper incisor
In the horse, when does the hook appear and on what tooth?
on the upper third incisor at 7 and 11 years
In the horse, when does the first deciduous incisor erupt?
6-9 days
In the horse, when does the second deciduous incisor erupt?
6-9 weeks
In the horse, when does the third deciduous incisor erupt?
6-9 months
In the horse, when does the first permanent incisor erupt?
2.5 years
In the horse, when does the second permanent incisor erupt?
3.5 years
In the horse, when does the third permanent incisor erupt?
4.5 years
How long does it take for a tooth to wear?
6 months after eruption
In the horse, when does the cup on the permanent first incisor disappear?
6 years
In the horse, when does the cup on the permanent second incisor disappear?
7 years
In the horse, when does the cup on the permanent third incisor disappear?
8 years
If canines erupt in the horse, when will they erupt?
at 4-5(6) years
What is a dental star?
secondary dentin
What is the shape of young horse incisors?
oval sjaped
What is the shape of old horse incisors?
triangular
When is the angle of incidence more acute in the horse?
as it gets older, the angle becomes more acute
When are all deciduous incisors for cattle present?
at birth or by day 14
When are all deciduous incisors in small ruminants present?
at birth or by day 7
In cattle, when does the first permanent incisor erupt?
1.5-2 years
In cattle, when does the second permanent incisor erupt?
2-2.5 years
In cattle, when does the third permanent incisor erupt?
3-3.5 years
In small ruminants, when does the first permanent incisor erupt?
1-1.5 years
In small ruminants, when does the second permanent incisor erupt?
1.5-2 years
In small ruminants, when does the third permanent incisor erupt?
2.5-3 years
When does the canine erupt in cattle?
3.5- 4 years
When does the canine erupt in small ruminants?
3-4 years
