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

Deep Head (Teeth, Tongue, TMJ) Flashcards

(75 cards)

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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
describe dentine
- ivory - lies deep to enamel - cellular (like bone)
26
which tooth tissue has collagenous attachments that secure the tooth in alveolus
cementum
27
what is the only type of cell present in the pulp cavity
odontoblasts
28
role of odontoblasts
make dentine
29
what lines the inner layer of the pulp cavity
layer of odontoblasts which recede away from dentine as its made
30
what is contained within the pulp cavity
- contains CT blood supply innervation (pain)
31
crown
exposed part of the tooth
32
root
embedded part of tooth
33
neck
demarcation between the crown and the root
34
describe the location of the neck of the tooth
where enamel dives down below gum line/ where cementum overrides enamel
35
brachydont
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
Hypsodont
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
what types of tooth tissue are exposed at the tooth surface in developed hypsodont teeth
enamel, dentine and cementum
38
in what kinds of species are hypsodont teeth common in?
herbivores
39
define diphydont
animal with two sets of teeth, initial deciduous (baby teeth) followed by permanent
39
define thecodont
teeth fixed in sockets/ alveolus in jaw --> most mammals (can be brachydont or hypsodont tooth in socket)
40
what is the benefit of having 3 dental tissue types exposed
wear at different rates, good for grinding food
40
what is different about the roots in equine molars
teeth have multiple roots
41
what CN innervates the teeth
CN V --> trigeminal nerve (gives sensation of pain
42
define polyphydont
constant replacement of teeth (ex. sharks)
43
describe the path of the trigeminal nerve after it exits the maxillary foramen
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
describe the path of the trigeminal nerve after it enters the maxillary foramen
trigeminal --> enters maxillary foramen --> become maxillary branch of trigeminal --> exits the infraorbital foramen --> gives off fibers that innervate upper incisors and canines
45
describe the path of the mandibular branch of the trigeminal nerve
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
incisors
adapted for cutting, embedding in the incisive bone or mandible
47
canines (cuspid) teeth are embedded....
at the junction of incisive and maxilla/mandible
48
describe premolars
teeth with deciduous precurssors, embedded in the maxilla/mandible
49
do molars have deciduous precursors
generally no, only erupt as permanent teeth
50
where are molars embedded
embedded in the maxilla/mandible
51
dog dental formula for deciduous teeth
313 (3 incisors, 1 canine, 3 premolars) 313 (3 incisors, 1 canine, 3 premolars)
52
describe the diastema in canine
caudal to canine teeth, rostral to premolar 4 --> premolars 1,2,3 do not touch
53
describe the diastema in the ox
between incisors and premolars
54
describe the difference in teeth in the upper vs lower jaw of the ox
upper jaw: no incisors, no canines lower: incisors but no canines
55
dental formula of canine permanent teeth
3142 (3I, 1C, 4P, 2M) 3143 (3I, 1C, 4P, 3M)
56
describe how the dental quadrants are classified in the triadan system
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
describe wolf teeth in horses
vestigial premolar, inconsistently present , small and often removed
58
T/F: horses have multiple roots to their teeth
true!
59
describe tooth replacement in horses
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
do the upper and lower premolar articulate in dogs
no! where diastema is
61
what upper jaw tooth articulates with M1 of the lower jaw in canine
P4 - Carnassial tooth
62
what are M1 and M2 of the upper jaw in canine also classified as
bunodont/ crushing teeth, smooth edges
63
what ar P4 and M1 classified as in the lower jaw of canine
selodont/ cutting teeth, sharp edges
64
occlusal surface
contacts tooth in opposite jaw
65
mesial surface
"in between" surfaces of teeth, closer to midline
66
distal surface
in between surfaces of teeth farthest from midline
67
describe the teeth in a horse up to 4 years old
teeth are in wear, complex surface, "cups" are formed
68
describe teeth in a 5 year old horse
level, infundibulum is fully outlined (food can be packed into infundibulum cup)
69
describe teeth in 7 year old horses
cup is gone, no more cementum, still some infundibulum and tooth is becoming more angular
70
describe teeth in a 10 year old horse
round, enamel spot and dental star (secondary dentine), tooth more rounded and infundibulum completely gone
71
describe the teeth in a 17 year old horse
triangular, enamel spot gone, dental star is all that is left
72
at what age does incisor 3 erupt in a horse
4.5 years old
73

Anatomy (41 decks)

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