all ceramic crowns

Question 1

ACC or MCC has better esthetics?

Answer 1

ACC

Question 2

rank from strongest to weakest:

glass-ceramic

porcelain/mostly glassy

glass/crystalline ceramic composite

dense sintered polycrystalline ceramics

Answer 2

strongest = dense sintered polycrystalline ceramics

glass/crystalline ceramic compoiste

glass-ceramic

weakest = porcelain (mostly glassy)

Question 3

how to increase strength of ceramics

Answer 3

increase crystalline content, decrease glassy phase

increase thickness

Question 4

draw back to increasing crystalline content of ceramics

Answer 4

opacity

Question 5

draw back to increasing thickness of ceramics

Answer 5

take away more tooth

Question 6

Y-TZP

Answer 6

strongest ceramic

zenostar

Question 7

eMax is what type of ceramic

Answer 7

lithium disilicate glass-ceramic

Question 8

Empress is what type of ceramic

Answer 8

leucite unforced glass ceramic

Question 9

rank from strongest to weakest: eMax, empress, zenostar

Answer 9

zenostar

emax

empress

Question 10

what type of ceramic should you use for premolars and molars

Answer 10

non silica based

(dense sintered polycrystalline ceramics, glass/crystalline ceramic composite)

zirconia!

Question 11

what type of ceramic should you use for anteriors

Answer 11

silica based

glass ceramic

primarily glass

EMAX!!

Question 12

three techniques for crown fabrication

Answer 12

full contour monolithic

minimal cutback

full cutback with opaque core

Question 13

method of crown fabrication depends on….

Answer 13

translucency and strength of ceramic material ordered

Question 14

do we mill or press emax

Answer 14

press

Question 15

for minimal cutback, what sort of translucency is required

Answer 15

at least moderate translucency

Question 16

for eMax does translucency effect strength

Answer 16

no

Question 17

larger shade changes require…..

Answer 17

more opacity

tell lab desired shade and stump shade

Question 18

full contour crown fabrication requires what translucency of material

Answer 18

must be translucent

Question 19

what material is used for full contour crown fabrication

Answer 19

emax I think

Question 20

which material shrinks by 20% when you bake it

Answer 20

zirconia

Question 21

anterior teeth crown fabrication technique

Answer 21

minimal cutback zirconia

add veneer porcelain for incisal details

Question 22

how to remove material from zirconia crowns

Answer 22

dialite zr kit (diamonds)

Question 23

how to add contacts to zirconia crowns

Answer 23

add low fusion porcelain

Question 24

what type of crowns can you add contact to

Answer 24

Zr and LDS

Question 25

do you need silane treatment for non silica based crowns

Answer 25

no

Question 26

what type of cement for non silica based crowns

Answer 26

phosphate esters based or RMGI cement

Question 27

how to prepare surface of silica based crowns before cementing

Answer 27

HF etch surface

apply silane

Question 28

what type of cement for silica based crowns

Answer 28

resin based

TE or SE

Question 29

how to minimize surface flaws in LDS crowns

Answer 29

polish after adjustments

etch internal surface

DONT GRIND INTERNAL SURFACE

Question 30

how to minimize surface flaws in Zr crowns

Answer 30

polish after adjustments

clean internal surface (dont etch)

DO NOT GRING INTERNAL SURFACE

Question 31

how to minimize stress on crowns

Answer 31

increase thickness

caution with bruxing for any ceramic