9. Laminate Veneers

Question 1

Laminate Veneers

Review: ____% survival rate (meta analysis) after 10 years
Study: 96% survival after 21 years

• What is the best structure to bond to? ____ bc we can acid etch it.So if you take away all the enamel with your prep like you do with a crown then it’s not going to be as good. We have to preserve the enamel as much as possible

Answer 1

96

enamel

Question 2

laminate veneers

preparation

• minimally ____
• stay in ____
• ____
• follow tooth curvature
• do not need retentive preparations bc we rely on ____

Answer 2

invasive
enamel
supragingival
bonding

Question 3

three labial planes for the veener prep

• ____
• ____
• ____

Answer 3

cervical
mid buccal/labial
incisal

Question 4

amount of incisal reduction: ____mm

Answer 4

1-2

Question 5

typically do not extend prep to the palatal > keep it on the ____ aspect

high occlusal forces > may want to extend to the ____; if doing this have to make sure no ____ in the area between the ceramic and tooth

Answer 5

labial and incisal
palatal
occlusal or functional contacts

Question 6

laminate veneer
preparation

at least ____% enamel
max ____ mm labial reduction
____ incisal reduction
supra-/epigingival

• prepare ____
• • prepared in order to avoid seeing triangle of natural tooth structure

Answer 6

50
0.7
2.0
elbows

Question 7

laminate veneers
- preparation

prepare ____ into contact areas

• do not open ____ area with preparation
• after prep, slightly “____” with finishing strip or disk to create space for impression material and master cast cutting

Answer 7

half-way
contact
slice

Question 8

amount of shade depends on teeth underneath > why ____ beforehnad

large papilla > bring prep to ____ aspect and open contact completely > build up nice ____ profile

Answer 8

bleached
palatal
emergence

Question 9

laminate veneers
- preparation

alternative preparation:
open contact areas/prepare to the \_\_\_\_
to achieve better emergence profile
- open \_\_\_\_ spaces
- \_\_\_\_ missing (support needed)

Answer 9

palatal
interproximal
papilla

Question 10

laminate veneers
- preparation

take ____ for optimal color match

Answer 10

stump shade

Question 11

only bond the provisional in a ____ spot > so when remove provisional you only have to grind on that area

Answer 11

small

Question 12

laminate veneers
- try-in

verify shade with ____ paste

Clean

• ____ or aceton in ultrasonic cleaner
• ____ acid
• ____ thoroughly

Answer 12

try-in
alcohol
phosphoric
rinse

Question 13

Resin bond
HF acid etching

Feldspathic
9.5% HF 2 min

bond silica-based ceramics > ____

if using a ceramic with higher crystalline (lithium disilic or leucite-reinforced) won’t have to etch as much as the one that doesn’t have many ____ (feldspathic)

• ____ has the least amount of crystals and ____ has the most
• etching time is ____ for silica ceramics

Answer 13

hydrofluoric acid
crystals
feldspathic
lithium disilic
lowering

Question 14

Resin bond
SILICA

ultrasonic cleaning (5 min) in:

• 95% alcohol
• acetone
• distilled water

when acid etching > precipitants of salts > create a ____ layer > removed via ____ cleaning

Answer 14

white-ish

ultrasonic

Question 15

Resin bond

SILICA

Mechnical
Chemical

One step (one bottle, prehydrol.) vs. two step (two bottle, unhdryol.)

• Silane coupling agent
• gives a ____ interlocking into crevices and gives a ____ bond of the silane to the silica

Answer 15

mechanical

chemical

Question 16

Resin bond
ENAMEL

enamel
92-96% ____
1% protein
3-4% water

• enamel is mostly crystalline and that’s why we ____

Answer 16

calcium hydroxyapatite

acid etch

Question 17

Resin bond

ENAMEL & DENTIN

Self-etch

• more ____
• ____ cavity
• selective enamel etch in ____ cavities

Etch & rinse (phosphoric acid)

• more ____
• ____ restorations (selective etch)
• ____ restorations

etch and rinse: use ____ and then a bonding agent on top of that
self etch > doesn’t always use ____

• you can also ____ these!

Answer 17

dentin
small/entire
large

enamel
larger
indirect

phosphoric acid
phosphoric acid
combine

Question 18

Resin bond
COMPOSITE

light cure - insure, relyX veneer
dual cure - clearfil esthetic, variolink
self cure - panavia

composite is usually a ____ for thin veneers
dual cures tend to ____ over time
self cure only has a ____ time available

Answer 18

light cure
discolor
limited

Question 19

apply ____
____ off acid after 2 min > put in ____ to get rid of salt
apply ____
let solvents ____

apply ____ > 60 sec > rinse
apply ____
____ cure

Answer 19

HF acid
rinse
ultrasonic cleaner
silane coupling agent
evaporate

phosphoric acid
bonding agent
light