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Anatomy > Deep Head (Teeth, Tongue, TMJ) > Flashcards

Deep Head (Teeth, Tongue, TMJ) Flashcards

1
Q

CN responsible for motor innervation to muscles of the rostral 2/3rds of the tongue

A

CN V3: trigeminal - mandibular nerve

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2
Q

CN responsible for sensory innervation to tastebuds of the rostral 2/3rds of the tongue

A

CN 7: facial nerve

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3
Q

what nerve provides innervation to the muscles of the caudal 1/3 of the tongue (motor)

A

CN XII: hypoglossal nerve

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4
Q

what nerve provides sensory innervation of tastebuds to the caudal 1/3 of the tongue

A

CN IX (9): glossopharyngeal nerve

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5
Q

what spaces does the tongue occupy

A

occupies much of the oral cavity, some of the oropharynx

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6
Q

Describe follate papillae in ruminants

A

absent

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7
Q

are filiform papillae mechanical or sensory

A

mechanical

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8
Q

are fungiform papillae sensory or mechanical

A

sensory (taste)

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9
Q

what are the 3 kinds of sensory papillae that make up the taste buds

A

fungiform, follate, vallate

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10
Q

which two papillae are scattered all over the tongue

A

fungiform and filiform

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11
Q

lentiform papillae are modified ______ papillae

A

filiform

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12
Q

where are vallate papillae mostly found

A

towards the base of the tongue

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13
Q

where are foliate papillae typically found

A

on lateral surface, caudal aspect of tongue

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14
Q

describe conical papillae

A

caudally oriented, filiform papillae

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15
Q

clinical significance of the lingual fossa

A

can collect food but becomes easily infected

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16
Q

which species have a lingual fossa

A

Ox and sheep

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17
Q

which species do not have a lingual fossa

A

dogs, cat, pig, horse

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18
Q

The extrinsic muscles of the tongue connect it to _____

A

bone

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19
Q

The styloglossus muscle connects the tongue to the ______

A

Stylohyoid bone

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20
Q

which muscle elevates the tongue

A

mylohyoideus

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21
Q

T/F: the mylohyoideus muscle is an extrinsic muscle of the tongue

A

F: technically not an extrinsic muscle

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22
Q

name 3 tooth tissues

A

enamel, cementum, dentine

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23
Q

describe enamel

A

acellular - irreplaceable, one-time coating, present at eruption
hard - wears away with tooth wear
only on crown - erupted above gum line

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24
Q

describe cementum

A

softest - of the three tooth tissues
Cellular (like bone)
- covers root

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25
Q

describe dentine

A
  • ivory
  • lies deep to enamel
  • cellular (like bone)
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26
Q

which tooth tissue has collagenous attachments that secure the tooth in alveolus

A

cementum

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27
Q

what is the only type of cell present in the pulp cavity

A

odontoblasts

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28
Q

role of odontoblasts

A

make dentine

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29
Q

what lines the inner layer of the pulp cavity

A

layer of odontoblasts which recede away from dentine as its made

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30
Q

what is contained within the pulp cavity

A
  • contains CT
    blood supply
    innervation (pain)
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31
Q

crown

A

exposed part of the tooth

32
Q

root

A

embedded part of tooth

33
Q

neck

A

demarcation between the crown and the root

34
Q

describe the location of the neck of the tooth

A

where enamel dives down below gum line/ where cementum overrides enamel

35
Q

brachydont

A

low crowned - enamel part of tooth almost completely exposed with eruption (only a bit of reserved crown)
simple - not folded, no complex occlusal surface

36
Q

Hypsodont

A

high crowned - enamel portion dives deep into gums, lots of crown in reserve, as tooth continues to erupt more crown will be exposed
complex - folded layers

37
Q

what types of tooth tissue are exposed at the tooth surface in developed hypsodont teeth

A

enamel, dentine and cementum

38
Q

in what kinds of species are hypsodont teeth common in?

A

herbivores

39
Q

define diphydont

A

animal with two sets of teeth, initial deciduous (baby teeth) followed by permanent

39
Q

define thecodont

A

teeth fixed in sockets/ alveolus in jaw –> most mammals
(can be brachydont or hypsodont tooth in socket)

40
Q

what is the benefit of having 3 dental tissue types exposed

A

wear at different rates, good for grinding food

40
Q

what is different about the roots in equine molars

A

teeth have multiple roots

41
Q

what CN innervates the teeth

A

CN V –> trigeminal nerve (gives sensation of pain

42
Q

define polyphydont

A

constant replacement of teeth (ex. sharks)

43
Q

describe the path of the trigeminal nerve after it exits the maxillary foramen

A

after the trigeminal nerve exits the maxillary foramen, it becomes the maxillary branch of the trigeminal nerve will exit the infraorbital foramen to and give off fibers that innervate the upper incisors and canines

44
Q

describe the path of the trigeminal nerve after it enters the maxillary foramen

A

trigeminal –> enters maxillary foramen –> become maxillary branch of trigeminal –> exits the infraorbital foramen –> gives off fibers that innervate upper incisors and canines

45
Q

describe the path of the mandibular branch of the trigeminal nerve

A

mandibular branch of trigeminal enters mandibular foramen –> becomes inferior alveolar nerve –> gives off fibers that innervate lower teeth and and also exits mental foramen –> becomes mental nerve that innervate lower incisors and canines

46
Q

incisors

A

adapted for cutting, embedding in the incisive bone or mandible

47
Q

canines (cuspid) teeth are embedded….

A

at the junction of incisive and maxilla/mandible

48
Q

describe premolars

A

teeth with deciduous precurssors, embedded in the maxilla/mandible

49
Q

do molars have deciduous precursors

A

generally no, only erupt as permanent teeth

50
Q

where are molars embedded

A

embedded in the maxilla/mandible

51
Q

dog dental formula for deciduous teeth

A

313 (3 incisors, 1 canine, 3 premolars)
313 (3 incisors, 1 canine, 3 premolars)

52
Q

describe the diastema in canine

A

caudal to canine teeth, rostral to premolar 4 –> premolars 1,2,3 do not touch

53
Q

describe the diastema in the ox

A

between incisors and premolars

54
Q

describe the difference in teeth in the upper vs lower jaw of the ox

A

upper jaw: no incisors, no canines
lower: incisors but no canines

55
Q

dental formula of canine permanent teeth

A

3142 (3I, 1C, 4P, 2M)
3143 (3I, 1C, 4P, 3M)

56
Q

describe how the dental quadrants are classified in the triadan system

A

first digit = quadrant of mouth
second and third digit = tooth placement
100 = upper right
200 = upper left
300 = lower left
400 = lower right

deciduous teeth:
500 = upper right
600 = upper left
700 = lower left
800 = lower right

57
Q

describe wolf teeth in horses

A

vestigial premolar, inconsistently present , small and often removed

58
Q

T/F: horses have multiple roots to their teeth

A

true!

59
Q

describe tooth replacement in horses

A

deciduous teeth will still be in place as “caps”, some resorption of root will take place –> eventually fall out and permanent teeth migrate into place

60
Q

do the upper and lower premolar articulate in dogs

A

no! where diastema is

61
Q

what upper jaw tooth articulates with M1 of the lower jaw in canine

A

P4 - Carnassial tooth

62
Q

what are M1 and M2 of the upper jaw in canine also classified as

A

bunodont/ crushing teeth, smooth edges

63
Q

what ar P4 and M1 classified as in the lower jaw of canine

A

selodont/ cutting teeth, sharp edges

64
Q

occlusal surface

A

contacts tooth in opposite jaw

65
Q

mesial surface

A

“in between” surfaces of teeth, closer to midline

66
Q

distal surface

A

in between surfaces of teeth farthest from midline

67
Q

describe the teeth in a horse up to 4 years old

A

teeth are in wear, complex surface, “cups” are formed

68
Q

describe teeth in a 5 year old horse

A

level, infundibulum is fully outlined (food can be packed into infundibulum cup)

69
Q

describe teeth in 7 year old horses

A

cup is gone, no more cementum, still some infundibulum and tooth is becoming more angular

70
Q

describe teeth in a 10 year old horse

A

round, enamel spot and dental star (secondary dentine), tooth more rounded and infundibulum completely gone

71
Q

describe the teeth in a 17 year old horse

A

triangular, enamel spot gone, dental star is all that is left

72
Q

at what age does incisor 3 erupt in a horse

A

4.5 years old

73
Q
A

Anatomy (41 decks)

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