basic tooth and periodontium :)

Question 1

what is the cervix of the tooth

Answer 1

where the crown joints the root

Question 2

what is the bottom point of the tooth

Answer 2

apex

Question 3

what is the clinical crown

Answer 3

crown seen in paitents mouth

Question 4

what is the anatomical crown

Answer 4

entire crown

gingivae overlines the cervix of the tooth

Question 5

what is enamel

Answer 5

layer of tissue which covers the anatomical crown of tooth

Question 6

what is enamel derived from

Answer 6

ectoderm cells

Question 7

what is enamel when fully formed

Answer 7

non vital acellular so cannot be repaired

Question 8

what runs through enamel tissue

Answer 8

enamel rods/prisms

Question 9

how is enamel deposited

Answer 9

increments

Question 10

what is dentine derived frm

Answer 10

ecomesenchyme

Question 11

mineralisation of dentine and enamel

Answer 11

dentine 70

enamel 96

Question 12

is dentine living or non living

Answer 12

living

Question 13

properties of dentine

Answer 13

compressive and tensile strength

acts as a cushion for enamel

Question 14

what are found within the dentine

Answer 14

dentine tubules

Question 15

what do dentine tubles contain

Answer 15

odontoblast cell processes extending from odontoblast cell bodies

Question 16

where do odontonblasts cell bodies lie

Answer 16

pulp dentine boundary

Question 17

where is dentine laid down around

Answer 17

around the tubules

Question 18

what happens to the odontoblasts in the dentine

Answer 18

remain on pulp dentine boundary in quiesent state

can be reactivated to produce new dentine

Question 19

what is the pulp

Answer 19

centre of the tooth

Question 20

what is the pulp derived from

Answer 20

ectomesechyme

Question 21

describe the pulp

Answer 21

soft vital connective tissue
odontoblast cells line the outside of the pulp
occupies pulp chamber in crown and root canals

Question 22

what covers the tooth root

Answer 22

cementum

Question 23

what is cementum derived from

Answer 23

ectomesenchyme

Question 24

mineralisation of cementum

Answer 24

55% mineral

Question 25

where is acellular cementum

Answer 25

towards the crown of the tooth

Question 26

where is cellular cementum

Answer 26

towards the apex of teh tooth

Question 27

what is found in cellular cementum

Answer 27

cementocytes in lacunae

Question 28

name the periodontal tissues

Answer 28

periodontal ligament alveolar bone gingiva

Question 29

what is PDL derived from

Answer 29

ectomesenchyme

Question 30

what is the alveolar bone

Answer 30

part of mandible and maxilla which supports the tooth roots and creaes the tooth socket

Question 31

what does the alveolar bone do

Answer 31

form anchor for PDL fibres

Question 32

what does alveolar bone respond to

Answer 32

loading

Question 33

gingivae in health

Answer 33

pale pink thick keratinised adjacent to cervix of tooth

Question 34

oral mucosa in health

Answer 34

red lines oral cavity stretches found in low abrasion areas

Question 35

type of epithelium of gingivae

Answer 35

stratified sqamous keratinised

Question 36

purpose of gingivae

Answer 36

form protective region where teeth pierce epithelium

Question 37

oral mucosa epithelium

Answer 37

stratified squamous | can be keratinised

Question 38

dentition types for humans

Answer 38

primary | permanent

Question 39

how many teeth in primary

Answer 39

``` 20 2 incisors 1 canine 2 molars ABCDE ```

Question 40

Permanent dentition

Answer 40

16 teeth

Question 41

quadrants for permanent/primary

Answer 41

1-4 | 5-8

Question 42

what does the PDL do

Answer 42

connects cementum of tooth to the - alveolar bone - adjacent teeth - gingivae

Question 43

why do fibres go in different directions

Answer 43

supports the root of the tooth within the socket | help bring the tooth back uo after pressure is allied

Question 44

what reforms during orthodontic treatment

Answer 44

PDL (apart from the end inserted into the cementum as the cementum doesnt remodel)

Question 45

composition of the PDL

Answer 45

dense fibrous tissue collagen with formative fibroblasts interspersed, neurovaualr bundles - arranged in different orientations to absorb masticatory load

Question 46

types of forces applied to the tooth

Answer 46

axially (down towards the apex) rotational tiliting