1A- Dental Anatomy

Question 1

What cells form enamel?

Answer 1

Ameloblasts

Question 2

What cells form dentine?

Answer 2

Odontoblasts

Question 3

What cells form cementum?

Answer 3

Cementoblasts

Question 4

What % of enamel is hydroxyapatite?

Answer 4

96%

Question 5

What % of enamel is proteins and water?

Answer 5

4%

Question 6

What % of dentine is hydroxyapatite?

Answer 6

70%

Question 7

What % of dentine is organic material?

Answer 7

20%

Question 8

What % of dentine is water?

Answer 8

10%

Question 9

What are the 2 notations for teeth charting?

Answer 9

1. Palmers notation

2. FDI

Question 10

How can you tell the difference between primary and permanent teeth?

Answer 10

Primary teeth are 
Smaller (except E)
Whiter 
Squarer incisors
Spacing and wear more likely 
No premolars 
Shallower fissures 
20 maximum teeth

Question 11

What permanent tooth erupts first?

Answer 11

Upper and lower 6

Question 12

When teeth are missing from an arch, what can happen to the other teeth near the gap?

Answer 12

Other teeth can move, tip/rotate to fill the space. Supporting bone is resorbed

Question 13

What is mixed dentition?

Answer 13

A combination of deciduous (primary) and permanent teeth

Question 14

How many roots do the lower permanent teeth have?

Answer 14

(1-5 = 1 root)
(6,7,8 = 2 roots)

Question 15

How many roots do the upper permanent teeth have?

Answer 15

(1,2,3,5 = 1 root)
(4 = 2 roots) 
(6,7,8 = 3 roots)