DMS summary - ceramics

Question 1

What is the composition of dental ceramics

Answer 1

Kaolin (very little)
Quarts
Feldspar (lots!) 
Metal oxides (for colour)
Glass

Question 2

What makes dental ceramic different to decorative

Answer 2

Decorative ceramics has way more kaolin and less feldspar

Question 3

What are useful properties of dental ceramics

Answer 3

reat aesthetics
Very stable chemically
Good biocompatibility
Coefficient of thermal expansion similar to dentine
Thermal diffusivity is low
Strong
Hard (a bit too hard - need to be glazed)

Question 4

What are not so useful properties of dental ceramics

Answer 4

Low tensile strength
Low flexural strength
Low fracture toughness
Undergoes static fatigue

Question 5

What copings can be used for dental ceramics

Answer 5

zirconia
alumina
metal