Dentition 1

Question 1

outer layer tooth

Answer 1

enamel - formed by ameloblasts, acellular, cannot regenerate

Question 2

second layer of tooth

Answer 2

dentine - formed by odontoblasts

Question 3

middle part of tooth

Answer 3

pulp cavity

Question 4

ligament attaching teeth to mouth

Answer 4

periodontal ligament

Question 5

epithelium lining the gum

Answer 5

stratified squamous

Question 6

formation of secondary dentine

Answer 6

odontoblasts recede from newly formed dentine and remain as layer on surface of pulp cavity. produces secondary dentine throughout life, reducing size of pulp cavity
it is darker in colour than primary dentine

Question 7

tertiary dentine occurs

Answer 7

at sites of injury

Question 8

cementum

Answer 8

calcified connective tissue
outer lining of tooth socket in brachydont
cover hypsodont teeth
produced throughout life

Question 9

which part of tooth contains nerves, lymphatic and blood vessels

Answer 9

pulp cavity

Question 10

4 things that make up periodontum

Answer 10

periodontal ligament, gingiva, alveolar bone,

anchors tooth in skull and provides support for biting

Question 11

gingiva

what epithelium is it made of?

Answer 11

oral mucosa covering alveolar processes of jaw and neck of teeth
keratinised stratified squamous

Question 12

alveolar bone

Answer 12

bone lining socket
thin white line appearing on radiographs
is called lamina dura

Question 13

innervation of teeth

Answer 13

CN V

Question 14

what division are upper and lower teeth supplied by?

Answer 14

upper = maxillary/superior alveolar 
lower = mandibular/inferior alveolar

Question 15

diphyodont

Answer 15

two sets of teeth - deciduous and then permanent

Question 16

heterodont

Answer 16

different types of specialised teeth

Question 17

dental formula of standard mammal

Answer 17

incisors - 3U 3L
canines - 1U 1L
premolars - 4U 4L
molars - 3U 3L

Question 18

hypsodont

Answer 18

high long crowned with unerupted crown beneath gum in all but very old animals. root shorter than crown

Question 19

brachydont

Answer 19

low/short crowned
all crown erupted by adulthood
root longer than crown

Question 20

aradicular/elodont

Answer 20

grow throughout life and never develop true roots

always hypsodont

Question 21

radicular/anelodont

Answer 21

true anatomical root
don’t grow throughout life
can be hypsodont or brachydont

Question 22

clinical crown

Answer 22

exposed part of tooth regardless of structure

Question 23

anatomical crown

Answer 23

portion of tooth covered by enamel

Question 24

mesial

Answer 24

surface touching tooth in front

Question 25

occlusal

Answer 25

masticatory surface

Question 26

carnivores are

Answer 26

radicular brachydonts

Question 27

eruption times for deciduous and permanent teeth in dogs and cats

Answer 27

dogs - 6 weeks, 7 months

cats - 6 weeks, 6 months

Question 28

normal oral pH dogs and cats and how it’s maintained

Answer 28

7.5

saliva mechanically washed teeth and has some antifungal and antiviral actions

Question 29

prognathism

Answer 29

lower jaw too long (brachycephalic)

Question 30

brachygnathism

Answer 30

lower jaw too short

dolichocephalic

Question 31

3 stages of periodontal disease

Answer 31

1. gingivitis
2. early periodontitis - gingiva and periodontal ligament
3. further breakdown of support tissues, tooth mobility and tooth loss

advanced disease can lead to formation of oronasal fistulas in upper dental arcade

Question 32

plaque

Answer 32

biofilm covering teeth

Question 33

formation of calculus

Answer 33

inorganic substances from saliva deposited into plaque form calculus

Question 34

pig dentition

Answer 34

lower incisors point forward
canines (tusks) open rooted and grow whole life males
females roots close at 2
teeth get larger caudally
very tubercular surface for crushing food
do not have deciduous dentition until 18 m/o