Ceramics 1- Porcelain Flashcards
1
Q
what compromises ceramic
A
crystalline
2
Q
porcelain breakdown
A
glass matrix
crystal second phse
combincation of glass and crystal
3
Q
glass is what?
A
amorphus
-
4
Q
3 main ceramic materials
A
- ceramic
- porcelain
- glass
5
Q
alumina
A
oxidized metal - alumnium
Al2O3
6
Q
crystalline alumina
A
Al2O3
repeat in a orderly manored
7
Q
zirconia - general
A
ZrO2
oxidized zirconium (metal)
8
Q
Duceram LFC aka
A
glass
9
Q
does glass have any crystalline content?
A
NO
10
Q
what is porcelain composed of
A
glass and crystals
11
Q
how much porcelain needed to block out metal / opaque
what do you need a minimum amount of reductin in PFM?
A
1.5 mm
bulky or lemon drop appearance
12
Q
smaller particle sizes do what three beneficial things?*
A
- stronger
- low wear to opposing teeth
- improved polishing/ surface finish
