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Flashcards in enamel Deck (15)
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1

what is the name for enamel formation?

amelogenesis

2

when does amelogenesis occur?

after the first establishment of dentine, via cells known as ameloblasts

3

what is the first stage of enamel formation?

proteins and organic matrix form partially mineralised enamel

4

what is the second stage of enamel formation?

enamel mineralisation completed

5

what type of cells are ameloblasts?

polarised columnar cells

6

is enamel formed inwards or outwards?

outwards

7

what is the basic unit of enamel?

enamel rods

8

where are enamel rods found?

running dfrom the amelodentinal junction to the surface of the tooth

9

what do enamel rods consist of?

hydroxyapaptite

10

what structure form enamel rods?

crystallites

11

what is the hydroxyapatite content of enamel?

95% weight, 90% vol

12

what is the water content of enamel?

4% weight, 5-10% vol

13

what is the organic matrix content of enamel?

1% weight, 1-2% vol

14

describe the surface of enamel

smooth, may contain pitts and fissures

15

what are pits/fissures?

deep grooves on chewing surface of teeth