enamel morphology Flashcards
1
Q
which enamel is more mineralised, deep or surface?
A
surface
2
Q
what is the basic unit of enamel?
A
rod/prism
3
Q
enamel rods run from _ to _
A
ADJ to surface
4
Q
what is the hydroxyapatite content of enamel?
A
95% (90% vol)
5
Q
what is the water content of enamel?
A
4% (5-10% vol)
6
Q
what is the organic matrix content of enamel?
A
1% (1-2% vol)
7
Q
crystallites are deposited at __ __ to ameolbalst membrane
A
right angles
8
Q
which shape are hydroxyapatite crystals?
A
hexagonal
9
Q
rods run a __ course
A
sinusoidal
10
Q
where may you find gnarled enamel?
A
cusps
11
Q
what are enamel tufts?
A
hypo mineralised regions due to residual matrix protein at prism boundaries
12
Q
what are enamel lamella?
A
tufts that go all the way through the rod
13
Q
what are enamel spindles?
A
odontoblast processes extending into enamel
