9. Laminate Veneers Flashcards Preview

Fixed Prosth Final > 9. Laminate Veneers > Flashcards

Flashcards in 9. Laminate Veneers Deck (19)
Loading flashcards...
1
Q

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

A

96

enamel

2
Q

laminate veneers

preparation

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

invasive
enamel
supragingival
bonding

3
Q

three labial planes for the veener prep

  • ____
  • ____
  • ____
A

cervical
mid buccal/labial
incisal

4
Q

amount of incisal reduction: ____mm

A

1-2

5
Q

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

A

labial and incisal
palatal
occlusal or functional contacts

6
Q

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
A

50
0.7
2.0
elbows

7
Q

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
A

half-way
contact
slice

8
Q

amount of shade depends on teeth underneath > why ____ beforehnad

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

A

bleached
palatal
emergence

9
Q

laminate veneers
- preparation

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

palatal
interproximal
papilla

10
Q

laminate veneers
- preparation

take ____ for optimal color match

A

stump shade

11
Q

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

A

small

12
Q

laminate veneers
- try-in

verify shade with ____ paste

Clean

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

try-in
alcohol
phosphoric
rinse

13
Q

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
A
hydrofluoric acid
crystals
feldspathic
lithium disilic
lowering
14
Q

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

A

white-ish

ultrasonic

15
Q

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
A

mechanical

chemical

16
Q

Resin bond
ENAMEL

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

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

calcium hydroxyapatite

acid etch

17
Q

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!
A

dentin
small/entire
large

enamel
larger
indirect

phosphoric acid
phosphoric acid
combine

18
Q

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

A

light cure
discolor
limited

19
Q

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

apply ____ > 60 sec > rinse
apply ____
____ cure

A
HF acid
rinse
ultrasonic cleaner
silane coupling agent
evaporate

phosphoric acid
bonding agent
light