Lesson 61 - Teeth and aging horses

How many deciduous incisors do horses have?

3

How many deciduous canines do horses have?

0

How many deciduous premolar do horses have?

3

How long does Di 1 take to erupt?

6 days (0-1 week)

How long does Di 2 take to erupt?

6 weeks (4-6 weeks)

How long does Di 3 take to erupt?

6 months (6-9 months)

How many permanent incisors do horses have?

3

How many permanent canines do horses have?

males have 1

How many permanent premolar teeth do horses have?

3

How many permanent molar teeth do horses have?

3

What are wolf teeth?

small premolars

Where are wolf teeth usually present?

in the upper jaw

What is the term for the space where the bit usually goes?

diastema

How to tell the difference between permanent and deciduous teeth?

permanent teeth are taller and less wide with a yellowish appearance

What is the term for the deep groove in incisor hypsodont teeth?

infundibulum (cup)

What lines the infundibulum in incisors?

infundibulum cementum

What lines the infundibulum cement in incisors?

infundibulum enamel

What is between the infundibulum enamel and the peripheral enamel in incisors?

primary dentin

What is on the outside of the hypsodont incisor tooth?

peripheral enamel and peripheral cement

What closes off the top of the hypsodont teeth?

secondary dentin

What can you see on a horse's incisor tooth at five years old?

infundibulum

What can you see on a horse's incisor tooth at 10 years old?

bottom of infundibulum and beginning of pulp cavity

What can you see on a horse's incisor tooth at 15 years old?

pulp cavity gets larger

What can you see on a horse's incisor tooth at 20 years old?

large circular pulp cavity

How does the shape of the horse's incisor change from 5 years to 20 years old?

rectangular to triangular to biangular

What protects the pulp cavity when teeth wear down?

secondary dentin

What surface is the dental cup closer to?

lingual surface

Up to what age can you see the infundibulum?

10 years

What is the dental cup?

infundibulum

What is the dental star?

pulp cavity

What surface does the dental star start closer to?

labial surface

What is the enamel spot?

spot indicating the bottom of the infundibulum

What is the enamel spot usually accompanied with?

dental star

What is a tooth in wear?

tooth that shows signs of wear but not flat yet

What is a leveled tooth?

occlusive surface is flat

What is the galvaynes groove?

vertical groove on the upper corner incisor

What is a marker for a 7 yr old?

7 year hook on the corner incisor

When does the central incisor start to wear?

1 year

When does the lateral incisor start to wear?

1.5 year

When does the corner incisor start to wear?

2 years

When do the first permanent incisors erupt?

2.5 years

When do the second permanent incisors erupt?

3.5 years

When do the third permanent incisors erupt?

4.5 years

How long does it take for a tooth to grow fully?

6 months

When do you see a full mouth?

4.5 to 5 years

If all cups are present, I1 and I2 are level, stars slightly visible, and rectangular table, how old?

5 years

3 multiple choice options

If I1 cup gone, stars visible, I1, I2, I3 level, how old?

6 years

3 multiple choice options

If I1, I2 cup gone, stars visible, rounded/oval table, hook, how old?

7 years

3 multiple choice options

If all cups are gone, dental star and enamel spot become clearer starting from I1, how old?

8 years

3 multiple choice options

If stars clear on I1 & I2, round/oval profile, how old?

9 years

3 multiple choice options

If all stars clear, more round/oval profile, galvaynes groove present, how old?

10 years

3 multiple choice options

If galvaynes groove in top of tooth with round/oval table, how old?

11 years

3 multiple choice options

If galvaynes groove down to middle of tooth, enamel spots gone, triangular table, how old?

15 years

3 multiple choice options

If galvaynes groove to the bottom of tooth and triangular table, how old?

20 years

3 multiple choice options

What shape does 24 years have?

triangular table

What shape does 30 years have?

biangular table

How many deciduous teeth are there?

24

How many permanent teeth are there?

36-44