Teeth

Question 1

What are heterodont teeth

Answer 1

General incisors, canines, premolars, molars

Question 2

what are diphyodont teeth?

Answer 2

a single replacement of teeth
deciduous then permanent

Question 3

what are polyphyodont teeth

Answer 3

multiple successive sets of teeth

Question 4

what is a gap in the teeth called?

Answer 4

diastema

Question 5

what is the crown encased in

Answer 5

enamel

Question 6

what is the root encased in

Answer 6

cementum

Question 7

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

Answer 7

neck - where the cementoenamel junction lies

Question 8

what tooth tissue makes up the majority of the tooth?

Answer 8

dentine

Question 9

what is the pulp cavity?

Answer 9

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

Question 10

what form dentine

Answer 10

odontoblasts

Question 11

what forms enamel

Answer 11

ameloblasts

Question 12

what bone are teeth anchored to
and how?

Answer 12

alveolus bone
anchored by the periodontal ligaments to the socket

Question 13

what are the 4 types of periodontium tissue

Answer 13

gingiva
cementum
alveolar bone
periodontal ligaments

Question 14

what lines the alveolus bone

Answer 14

lamina dura bone

Question 15

describe gingiva

Answer 15

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

Question 16

what is the working surface of the tooth?

Answer 16

occlusal surface

Question 17

which is the least hard of the calcified tissues?

Answer 17

cementum

Question 18

how is the cementum connected to the periodontal ligament

Answer 18

collagen fibres extend between them

Question 19

describe odontoblast lifespand

Answer 19

have slow continuous lifespand - constant secondary dentin production

Question 20

what type of teeth to animals with a soft diet have

Answer 20

Brachydont

Question 21

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

Answer 21

hypsodont

Question 22

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

Answer 22

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

Question 23

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

Answer 23

mesial

Question 24

what is the back side of the tooth?

Answer 24

dorsal

Question 25

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

Answer 25

Buccal or labial

Question 26

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

Answer 26

lingual

Question 27

how are tooth sockets lined?

Answer 27

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.

Question 28

what are the functions of incisors?

Answer 28

grasping and tearing food

Question 29

what are the functions of canines?

Answer 29

weapons holding

Question 30

what are the functions of premolars

Answer 30

cutting and holding food inplace

Question 31

what are the functions of the molars?

Answer 31

cutting + crushing

Question 32

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

Answer 32

42 3 1 4 2 3 1 4 3

Question 33

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

Answer 33

30 3 1 3 1 3 1 2 1

Question 34

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

Answer 34

44 3 1 4 3 3 1 4 3

Question 35

which teeth are not deciduous

Answer 35

molars

Question 36

how are pig teeth specialised for a harder diet?

Answer 36

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

Question 37

what are needle teeth?

Answer 37

deciduous 3rd incisors and canines in pigs

Question 38

what are wolf teeth?

Answer 38

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

Question 39

describe how the cup is formed

Answer 39

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)

Question 40

what are peg teeth?

Answer 40

2nd incisors in lagomorphs

Question 41

what type of teeth to rabbits have

Answer 41

Aradicualr hypsodont (elodont)

Question 42

what does aradicular mean?

Answer 42

no true root

Question 43

what does radicular mean

Answer 43

true root

Question 44

what are elodont teeth?

Answer 44

constantly growing

Question 45

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

Answer 45

trigeminal nerve Through the maxillary and mandibular divisions

Question 46

how are upper incisor teeth innervated?

Answer 46

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

Question 47

how are mandibular teeth innervated?

Answer 47

inferioralveolar nerve branch of the mandibular nerve (mandibular canal)

Question 48

how are upper teeth vascularised?

Answer 48

through infraorbital artery

Question 49

how are lower teeth vascularised

Answer 49

through the inferior alveolar artery

Question 50

what is the main artery that vascularises the teeth?

Answer 50

external carotid artery

Question 51

What type of teeth do horses have

Answer 51

hypsodont means constantly erupting

Question 52

describe deciduous incisors in horses

Answer 52

convex on the labial aspect concave on the lingual aspect

Question 53

which dog teeth have 1 root?

Answer 53

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

Question 54

how many roots do the upper 2 + 3 PM have

Answer 54

2

Question 55

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

Answer 55

2

Question 56

How many roots do the lower 1 + 2 molar have

Answer 56

2

Question 57

how many roots does the upper 4th PM

Answer 57

3

Question 58

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

Answer 58

3

Question 59

which of horses teeth do not have infundibulum?

Answer 59

mandibular (apart from the incisors)

Question 60

which teeth are embedded in the maxillary sinus

Answer 60

3 - 6 cheek teeth

Question 61

describe the embryology of teeth developmenn

Answer 61

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

Question 62

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

Answer 62

ectoderm and mesoderm ectoderm = enamel