conservative porcelain veneer prep

Question 1

veneer

Answer 1

1) thin ceramic restoration bonded to front of teeth
2) change color, shape, close spaces, add length

Question 2

feldspathic porcelain

Answer 2

1) pretty but fragile

Question 3

lithium disilicate

Answer 3

stronger, less pretty

Question 4

contraindication

Answer 4

1) poor oral hygiene
2) extensive loss of enamel
3) unhealthy perio
4) unreasonable esthetic demands
5) functional concerns (posterior open bit, anterior cross bite)

Question 5

enamel preservation

Answer 5

1) remain in enamel for stength and predictable bonding

Question 6

reduction putty

Answer 6

1) falls over the bicuspids and has to cover the incisal edge
2) do not cover the lingual
3) draw line 2 mm from incisal edge
- cut incisal edge from cuspid to cuspid
4) draw lines 3 mm from cut
- cut little mouths on the putty
- only cut open one side of the putty

Question 7

prep process

Answer 7

1) depth cutting bur
- 0.3 mm
2) follow curve and contour
3) mark depth cuts with pencil
4) incisal reduction 1.5 - 2 mm
5 )join depth cuts
6 )conservative margin made with 012
- just above the gingival margin 0.5 mm
- feather margin
7) keep checking reduction with the putty
- you should have less towards the gingival
- 0.3mm - 0.7mm (incisal)

Question 8

stay in enamel

Answer 8

1) ivoclar tells you you need 0.6 of reduction
2) you only have 0.3 of enamel reduction available
- enamel is thinner at CEJ!!

Question 9

shade change

Answer 9

1) for 1st shade change
- you need 0.3 mm of veneer thickness
2) 0.2 for each additional shade change after (A3>A2>A1)
3) minimum machine thickness 0.5 mm
4) minimum definable chamfer margin 0.3 mm

Question 10

proximal reduction

Answer 10

1) maintain the contact
2) remove J lips
3) push proximal margins lingual to optimize esthetics and preserve contacts
- “wings” sweep under the contact
4) path of insertion is via buccal

Question 11

refine

Answer 11

1) the incisal and facial edge needs to be SMOOTH
- optidisc

Question 12

veener provisional

Answer 12

1) spot bond technique
2) place a small dot of etch on the mid facial, rinse, place a small amount of bonding agent on the same area, bond teeth with flowable or build up with composite (single unit)
- must be very PRECISE!!
3) shrink wrap technique
- smile design putty. place integrity into putty and place on teeth, allow integrity to set on teeth
- trim carefully
- mechanically retentive

Question 13

bonding protocol

Answer 13

1) isolation. isodry, or rubber dam
2) full bonding protocol
3) technique sensitive