april 19 lecture

Question 1

zirconia used in single unit going to want to what?

Answer 1

use porcelain as well with it – not all that esthetic

porcelain fused to zirconia

Question 2

bond strength to zirconia and porcelain?

Answer 2

not great

Question 3

if have die and going to do zirconia what is next step?

Answer 3

we will SCAN it

Question 4

if doing ceramo-metal and have die what is next

Answer 4

wax it

marginal integrity is key

Question 5

where would you want to make sure you have porcelain on the zirconia in posterior teeth?

Answer 5

on the buccal

Question 6

phosphate bonded investment for?

Answer 6

ceramo-metal and lithium dislicate

Question 7

ring liner gives what type of expansion

Answer 7

semi-hydroscopic expansion

Question 8

hydropscopic expansion relates to?w

Answer 8

how much water added

Question 9

thermal expansion when?

Answer 9

in oven

-when go through investment

Question 10

three types of expansion

Answer 10

1. hydroscopic
2. thermal
3. setting expansion of the actual material when

Question 11

thickness of the metal coping

Answer 11

3/10 mm

Question 12

complaint with PFM

Answer 12

esthetics at the margin

Question 13

ceramics we mill cerec have to be fired in a porcelain oven?

Answer 13

YES

Question 14

oven for PFM used to

Answer 14

heat treat it and create oxide layer then after this you can add the opacifiers / internal staining

do this for PFMs or PF zirconia’s

Question 15

aspects of the Porcelain

Answer 15

1. feldspar
2. quartz
3. kaolin
4. metallic pigments

Question 16

over contour the occlusal surface and contacts when applying the porcelain?

Answer 16

yes – to compensate for the heat shrinkage

Question 17

can you fire enamic?

Answer 17

No- only polishing it