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Integument and Alimentary systems SF2 > Teeth > Flashcards

Teeth Flashcards

1
Q

What are heterodont teeth

A

General incisors, canines, premolars, molars

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2
Q

what are diphyodont teeth?

A

a single replacement of teeth
deciduous then permanent

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3
Q

what are polyphyodont teeth

A

multiple successive sets of teeth

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4
Q

what is a gap in the teeth called?

A

diastema

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5
Q

what is the crown encased in

A

enamel

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6
Q

what is the root encased in

A

cementum

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7
Q

what is the part of the tooth between the root and the crown called?

A

neck - where the cementoenamel junction lies

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8
Q

what tooth tissue makes up the majority of the tooth?

A

dentine

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9
Q

what is the pulp cavity?

A

channel of connective tissue that goes through the root.
contains nerves and blood vessels

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10
Q

what form dentine

A

odontoblasts

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11
Q

what forms enamel

A

ameloblasts

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12
Q

what bone are teeth anchored to
and how?

A

alveolus bone
anchored by the periodontal ligaments to the socket

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13
Q

what are the 4 types of periodontium tissue

A

gingiva
cementum
alveolar bone
periodontal ligaments

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14
Q

what lines the alveolus bone

A

lamina dura bone

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15
Q

describe gingiva

A

gum - oral mucosa that covers the tooth (only visible periodontal tissue)

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16
Q

what is the working surface of the tooth?

A

occlusal surface

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17
Q

which is the least hard of the calcified tissues?

A

cementum

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18
Q

how is the cementum connected to the periodontal ligament

A

collagen fibres extend between them

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19
Q

describe odontoblast lifespand

A

have slow continuous lifespand - constant secondary dentin production

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20
Q

what type of teeth to animals with a soft diet have

A

Brachydont

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21
Q

what type of teeth to animals with rough fibrous diets have?

A

hypsodont

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22
Q

what is the difference between the clinical crown and the anatomical crown?

A

clinical is the exposed area of the tooth
anatomical is the enamel covered region

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23
Q

what is the side of the tooth that faces the next tooth called?

A

mesial

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24
Q

what is the back side of the tooth?

A

dorsal

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25
Q

what is the side of the tooth that faces the vestibule?

A

Buccal or labial

26
Q

what is the side of the tooth that faces the tongue?

A

lingual

27
Q

how are tooth sockets lined?

A

with thin lamina of compact bone.
some may be braced by spongy bone that extends into and merges with the internal compact of the jaw.

28
Q

what are the functions of incisors?

A

grasping and tearing food

29
Q

what are the functions of canines?

A

weapons
holding

30
Q

what are the functions of premolars

A

cutting and holding food inplace

31
Q

what are the functions of the molars?

A

cutting + crushing

32
Q

how many teeth do dogs have
and what is the dentition?

A

42

3 1 4 2
3 1 4 3

33
Q

how many teeth do cats have and what is the dentition?

A

30

3 1 3 1
3 1 2 1

34
Q

how many teeth do pigs have and what is the dentition?

A

44

3 1 4 3
3 1 4 3

35
Q

which teeth are not deciduous

A

molars

36
Q

how are pig teeth specialised for a harder diet?

A

cheek teeth (PM+M) have broad crowns for crushing

37
Q

what are needle teeth?

A

deciduous 3rd incisors and canines in pigs

38
Q

what are wolf teeth?

A

Maxillary 1st premolars (don’t always grow in)

39
Q

describe how the cup is formed

A

infundibulum - infolding of the enamel
horses teeth erupt constantly so the occasional surface wears down eventually exposing the secondary dentin which is yellow in colour.
this exposed dentin is called the dental star.
eventually this gets worn away leaving only the enamel spot (cup/infundibulum)

40
Q

what are peg teeth?

A

2nd incisors in lagomorphs

41
Q

what type of teeth to rabbits have

A

Aradicualr hypsodont (elodont)

42
Q

what does aradicular mean?

A

no true root

43
Q

what does radicular mean

A

true root

44
Q

what are elodont teeth?

A

constantly growing

45
Q

which of the 12 facial nerves innervates the teeth? and through which divisions?

A

trigeminal nerve
Through the maxillary and mandibular divisions

46
Q

how are upper incisor teeth innervated?

A

through infraorbital nerve branch of the maxillary nerve (through innfraorbital canal)

47
Q

how are mandibular teeth innervated?

A

inferioralveolar nerve branch of the mandibular nerve (mandibular canal)

48
Q

how are upper teeth vascularised?

A

through infraorbital artery

49
Q

how are lower teeth vascularised

A

through the inferior alveolar artery

50
Q

what is the main artery that vascularises the teeth?

A

external carotid artery

51
Q

What type of teeth do horses have

A

hypsodont
means constantly erupting

52
Q

describe deciduous incisors in horses

A

convex on the labial aspect
concave on the lingual aspect

53
Q

which dog teeth have 1 root?

A

incisors
canines
uppper + Lower 1st PM
Lower 3rd molar

54
Q

how many roots do the upper 2 + 3 PM have

A

2

55
Q

how many roots do lower 2 + 3 + 4 PM have?

A

2

56
Q

How many roots do the lower 1 + 2 molar have

A

2

57
Q

how many roots does the upper 4th PM

A

3

58
Q

How many roots does the upper molars (1+2) have?

A

3

59
Q

which of horses teeth do not have infundibulum?

A

mandibular (apart from the incisors)

60
Q

which teeth are embedded in the maxillary sinus

A

3 - 6 cheek teeth

61
Q

describe the embryology of teeth developmenn

A

bud of the permanent tooth found in the mesenchyme grows to dental papilla.
differentiate into odontoblasts then to dentine

62
Q

which germ layer(s) are the teeth derived form?

A

ectoderm and mesoderm
ectoderm = enamel

Integument and Alimentary systems SF2 (19 decks)

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