Horse Teeth Lecture

Question 1

Deciduous dental formula

Answer 1

I 3/3
C 0/0
PM 3/3

(2x)

Total=24

Question 2

Permanent dental formula

Answer 2

I 3/3
C 1/1
PM 3 or 4/3
M 3/3

(2x)

Total= 4o or 42

Question 3

Pre molar explanation in permanent dental formula

Answer 3

Small “wolf tooth” may be present but doesn’t stay whole time.

Question 4

Canine teeth variability

Answer 4

Gender and breed related
Females normally lack
But islandic females have

Question 5

Growth rate of horse teeth

Answer 5

2-3 mm/yr

Question 6

Hypsodont

Answer 6

long tooth

Question 7

Lophodont

Answer 7

Cheek teeth have transverse ridges on occlusal surface called lophodont

Question 8

What causes the slanted occlusal surface. Problems?

Answer 8

Maxillary cheek teeth are wider than mandibular cheek teeth= Anisognathia

Creates sharp edges that causes clinical implications= unequal jaw.

To fix, file inside lower and outside upper

Question 9

Slanted occlusal surface causes

Answer 9

anisognathia

Question 10

T/F Lower cheek teeth has true infundibulum

Answer 10

F

No true

Question 11

T/F upper cheek teeth each have 4 infundibua

Answer 11

F

2

Question 12

Pulp horns

Answer 12

Extensions of endodontic/dental cavity and pulp system into the reserve crown.

AKA portion of crown below gum

Question 13

Pulp compartment

Answer 13

Functional unit of pulp system. May be more than one pulp compartment in a cheek tooth

Question 14

T/F Pulp compartment consists of 2 pulp horns and 2 root canal

Answer 14

F
1 PH
1RC

Question 15

Pulp cavity contains

Answer 15

a, v, n of tooth

Question 16

Reliable criteria to estimate age of horse

Answer 16

Deciduous vs permanent teeth

eruption time of deciduous teeth

Eruption time of permanent teeth

Permanent teeth coming into wear

Question 17

Less reliable criteria estimating horse

Answer 17

Disappearance of cups

Hooks

Presence of stars

Shape of incisors

Angle of mouth

Galvayne’s groove

Question 18

What criteria trumps everything in estimating horse age via teeth?

Answer 18

Eruption time

Question 19

Eruption times of deciduous incisor teeth

Answer 19

Central: 6-8 days
Intermediate: 6-8 weeks
Corner: 6-8 months

Question 20

Eruption times for permanent incisors

Answer 20

Central=2.5 yrs
Intermediate=3.5 yr
Corner=4.5 yr

Canine=3.5-5 yr

Question 21

When does wearing appear in permanent teeth?

Answer 21

1/2 yr after eruption

Question 22

Full mouth in wear at what age

Answer 22

5 yr

Question 23

Disappearance of cups dependent on

Answer 23

dirt and soil

Question 24

T/F Cups of corner incisor teeth are often incomplete near lingual surface

Answer 24

T

Question 25

Mark of the mouth/Enamel spot

Answer 25

Disappearance of the enamel ring and it’s the enamel left at the bottom of an infundibulum

Question 26

Dental stars

Answer 26

Dark stained secondary or irregular secondary/tertiary dentin that has filled pulp cavity.

Question 27

When do dental stars appear and irregular secondary/tertiary dentine

Answer 27

As early as 4.5-5 yrs in central incisors, 6 yrs in intermediate incisors, 7 yrs in corner

Centralized tan/white spot (irregular 2ary/3ary dentine) appears 8,9,10 yrs.

Question 28

Hooks

Answer 28

Upper corner incisor teeth show “hooks or notches” at 7 and 11

Question 29

Angle of the mouth

Answer 29

Profile of upper and lower incisors is approx vertical in young mouth and become more angle as aging occurs

Question 30

Shape of incisor teeth

Answer 30

Progress in shape from oval to round to finally triangular

Question 31

Galvayne’s groove

Answer 31

Dark stained cement showing on upper corner incisors from 10-30 yrs

Question 32

Upper 1st PM not always present

Answer 32

Wolf tooth

Erupts about 5-6 mo, present 80% in yearlings but only 20-40% of 3 yr/o

Question 33

Eruption bumps present

Answer 33

On mandible btwn 2-4 yrs

Question 34

T/F Dental stars are reliable

Answer 34

F

But
Central-8
Intermediate-9
Corner-10