Horse Teeth Lecture Flashcards

1
Q

Deciduous dental formula

A

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

(2x)

Total=24

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2
Q

Permanent dental formula

A

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

(2x)

Total= 4o or 42

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3
Q

Pre molar explanation in permanent dental formula

A

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

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4
Q

Canine teeth variability

A

Gender and breed related
Females normally lack
But islandic females have

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5
Q

Growth rate of horse teeth

A

2-3 mm/yr

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6
Q

Hypsodont

A

long tooth

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7
Q

Lophodont

A

Cheek teeth have transverse ridges on occlusal surface called lophodont

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8
Q

What causes the slanted occlusal surface. Problems?

A

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

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9
Q

Slanted occlusal surface causes

A

anisognathia

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10
Q

T/F Lower cheek teeth has true infundibulum

A

F

No true

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11
Q

T/F upper cheek teeth each have 4 infundibua

A

F

2

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12
Q

Pulp horns

A

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

AKA portion of crown below gum

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13
Q

Pulp compartment

A

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

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14
Q

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

A

F
1 PH
1RC

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15
Q

Pulp cavity contains

A

a, v, n of tooth

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16
Q

Reliable criteria to estimate age of horse

A

Deciduous vs permanent teeth

eruption time of deciduous teeth

Eruption time of permanent teeth

Permanent teeth coming into wear

17
Q

Less reliable criteria estimating horse

A

Disappearance of cups

Hooks

Presence of stars

Shape of incisors

Angle of mouth

Galvayne’s groove

18
Q

What criteria trumps everything in estimating horse age via teeth?

A

Eruption time

19
Q

Eruption times of deciduous incisor teeth

A

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

20
Q

Eruption times for permanent incisors

A

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

Canine=3.5-5 yr

21
Q

When does wearing appear in permanent teeth?

A

1/2 yr after eruption

22
Q

Full mouth in wear at what age

23
Q

Disappearance of cups dependent on

A

dirt and soil

24
Q

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

25
Mark of the mouth/Enamel spot
Disappearance of the enamel ring and it's the enamel left at the bottom of an infundibulum
26
Dental stars
Dark stained secondary or irregular secondary/tertiary dentin that has filled pulp cavity.
27
When do dental stars appear and irregular secondary/tertiary dentine
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.
28
Hooks
Upper corner incisor teeth show "hooks or notches" at 7 and 11
29
Angle of the mouth
Profile of upper and lower incisors is approx vertical in young mouth and become more angle as aging occurs
30
Shape of incisor teeth
Progress in shape from oval to round to finally triangular
31
Galvayne's groove
Dark stained cement showing on upper corner incisors from 10-30 yrs
32
Upper 1st PM not always present
Wolf tooth | Erupts about 5-6 mo, present 80% in yearlings but only 20-40% of 3 yr/o
33
Eruption bumps present
On mandible btwn 2-4 yrs
34
T/F Dental stars are reliable
F But Central-8 Intermediate-9 Corner-10