Quiz

Question 1

What is the function of teeth? (4)

Answer 1

Mastication, appearance, support, speech

Question 2

Which has the highest mineral content?
Enamel
Dentine
Cementum

Answer 2

Enamel

Question 3

Which is the hardest?
Enamel
Dentine
Cementum

Answer 3

Enamel

Question 4

Which is the toughest?
Enamel
Dentine
Cementum

Answer 4

Cementum

Question 5

From what cells does enamel form?

Answer 5

Ameloblasts

Question 6

From what cells does dentine form?

Answer 6

Odontoblasts

Question 7

From what cells does cementum form?

Answer 7

Cementoblasts

Question 8

Is enamel a living tissue?

Answer 8

No

Question 9

What problems to occlusal fissures pose?

Answer 9

Toothbrush cannot reach the deep fissure so it a prime site for caries

Question 10

How are occlusal fissure treated?

Answer 10

Applying a fissure sealant

Question 11

Where does enamel grow from?

Answer 11

The enamel dentine junction from amelobalsts

Question 12

How is enamel structured?

Answer 12

Crystalline structure

Question 13

What is pre-dentine?

Answer 13

Newly formed band of dentine found at the plural border, it is unmineralised.

Question 14

What is primary dentine?

Answer 14

Dentine formed before the completion of the root formation

Question 15

What is secondary dentine?

Answer 15

Dentine formed after the completion of the root formation

Question 16

What is tertiary dentine?

Answer 16

Dentine formed in response to an external stimuli

Question 17

What is reactionary dentine?

Answer 17

Tertiary dentine formed from original odontoblast (weak injury)

Question 18

What is reparative dentine?

Answer 18

Tertiary dentine formed from new odontoblasts after severe injury

Question 19

What is pulp made of?

Answer 19

Collagen

Question 20

What runs through the pulp and where do they enter?

Answer 20

Blood vessels and nerves

Through apical foramen

Question 21

What cells does the pulp contain?

Answer 21

Mainly fibroblasts, some odontoblasts

Question 22

What are pulp stones?

Answer 22

Calcified masses that appear in the pulp of damaged or aged teeth

Question 23

What is the general term for teeth supporting structures?

Answer 23

Periodontium

Question 24

What are the 4 tooth supporting structures?

Answer 24

Gingiva, cementum, alveolar bone and periodontal ligaments

Question 25

What are the 2 types of gingiva and where are they found?

Answer 25

Free gingiva - movable - found from the gingival margin to the gingival sulcus Attached gingiva - attached to the bone

Question 26

What is the junctional epithelium and why is it leaky?

Answer 26

It attaches the gingiva to the enamel. | It is leaky to allow fluid containing immune cells through

Question 27

Why is healthy gingiva paler than unhealthy gingiva?

Answer 27

Healthy gingiva contains more keratin to protect it against abrasion during mastication

Question 28

What is the periodontal ligament made out of?

Answer 28

Collagen fibres | When these are found in the cementum and bone they are known as Sharpay fibres

Question 29

What is the function of the periodontal ligament?

Answer 29

Resists intrusion of the teeth during mastication

Question 30

What cells does the periodontal ligament contain and what are their functions?

Answer 30

Osteoblasts form bone Cementoblasts secrete cementum Fibroblasts secrete collagen

Question 31

How is the periodontal ligament adapted for its function?

Answer 31

High cell turnover Good vascular supply (so it can heal quickly) Good innervation (so it can respond to pain)

Question 32

What are the 2 different types fo cementum and where are they found?

Answer 32

Acellular - around the root | Cellular - around the apex

Question 33

What happens to surrounding alveolar bone if a tooth is removed?

Answer 33

It is resorbed by osteoclasts

Question 34

What is the Neo-natal line?

Answer 34

A line formed in the tooth at birth to show what dentine was made before and after birth

Question 35

What is the difference between enamel thickness and EDJ scalloping in primary and permanent mention?

Answer 35

Permanent dentition has a thicker enamel and a more scalloped EDJ

Question 36

What is the main organic component of dentine?

Answer 36

Collagen

Question 37

Why are dentine and enamel harder than bone?

Answer 37

Higher mineral content

Question 38

Is cementum vascular?

Answer 38

Yes