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Operative II E3 Flashcards

1
Q

3 general types of materials for Inlays/Onlays:

A

Direct composites

Indirect composites

Indirect Ceramics

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2
Q

Advantages to Direct Composites:

Disadvantages

A

Less cost/time, simple technique, repairable

Tech. sensitive, isolation, matls not fully set

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3
Q

Advantages to Indirect Composites:

Disadvantages:

A

Control contours, Better Wear resist, repairable, flexible

Cost/time, isolation

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4
Q

Advantages to Indirect Ceramics:

Disadvantages:

A

Control contours, Best wear resist, better bond to enamel

Most cost/time, brittle, isolation, NOT repairable

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5
Q

Indirect Composite Advantages are ______ physical/chemical properties

______ polymerization shrinkage

Predictably better ______

*also great esthetics and matl advancements

A

increased

Zero

contacts/contours

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6
Q

Indirect Composites are _______, improving pretty much all properties over Direct Composites

A

Silanated

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7
Q

A big advantage to Indirect Composites is that they are compatible with what?

A

Enamel

*Ceramics can be abrasive

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8
Q

What has better plaque resistance, composite or ceramics?

A

Ceramics

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9
Q

Describe Steps to make Indirect Composite - chairside:

A

Prep

Impression

Silicone die (Mach III)

*make composite on silicone die

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10
Q

4 Steps Lab takes to make Indirect Composite:

after Prep/Impression

A

PVS Impression

Model poured

Separating liquid

Composite placed

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11
Q

When building up an Indirect Composite, mark borders of die red and add what?

A

Color, Dentin shades in layers, then Enamel shades

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12
Q

Trim an Indirect Composite build up (on die) with what?

Then add…

Then is the final ______ cycle

A

diamond burs

stains

polymerization

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13
Q

Final polymerization of Indirect Composites is done under what?

why?

A

Vacuum

Increases hardness and polishability

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14
Q

Describe Mechanical Retention method for Delivering Indirect Composites?

A

Roughen internal surface

Sandblast

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15
Q

Describe Mechanical/Chemical retention method for Delivering Indirect Composites?

A

SiO2 impregnation

Silane

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16
Q

T/F

The fastest growing segment of the dental Tx market is All ceramic restorations - annual growth of 20%

A

True

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17
Q

All Ceramic CAD crowns have similar success rate to what?

A

PFM

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18
Q

List 4 all ceramic matls of increasing strength

A

Hand condensation

Silica CAD blocks

LiDisilicate (Emax)

Zirconia alumina

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19
Q

Ceramics are durable but ________

A

Brittle

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20
Q

T/F

Ceramics are more costly than gold

A

False

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21
Q

Ceramics have low _______ strength

A

Edge

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22
Q

3 General Ceramic choices:

w/ 3 specific products

A

High glass (silica - highly esthetic)

Low Glass (LiDisilicate - Emax)

No glass (Zirconium)

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23
Q

MCC’s (PFMs) are weak when…

A

hand layered

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24
Q

What is the main advantage of a Monolithic Restoration matl vs. a Layered?

A

Chipping can occur along layer lines.

*milled ceramic blocks are monolithic

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25
Emax (LiDisilicate) has what intrinsic property allowing for increased flexural strength?
Large crystals
26
LiDisilicate wears similarly to what?
Enamel
27
What product is milled in a softer Blue State? After milling, what is done?
IPS Emax CAD Sintered, glazed, recrystallized into stronger structure
28
What all ceramic product is pressed into a Lost Wax Casting?
IPS Emax Press
29
Zirconia is very opaque, durable, can be made thinner,, wears _____ heavily, and is not ______, therefore there is little _______
Enamel Etchable Bonding
30
What is the advantage to bonding an all ceramic restoration?
Micro-mechanical bonding AND Chemical bonding via Silane coupler
31
Would you use Bond or Cement for all ceramics?
Bond
32
Should Posts be bonded or cemented?
Bonded - reduces fracture
33
Bonded ceramics allow us to be more_______ b/c of micromechanical bonding and Chemical bonding via silane coupler
Conservative w/ preps
34
All ceramic preps are similar to what 2 preps?
Zirconia/Gold
35
T/F | Zirconia can be bonded
False
36
List 3 prep designs for All Ceramics in increasing strength:
Full Wall defect (one wall) Inlay (MOD) Full Onlay (MOD and both L and F cusps reduced)
37
Where are the margins (in the Hood region) in All Ceramic Inlay/Onlay preps? The Box margins are what? All axial _____ All other walls ______ Facial and lingual walls diverge ____ degrees per side
Supragingival Butt Joint Margins Converge Diverge 6-8 degrees
38
Onlay prep - Functional cusp reduction: Non-functional cusp reduction:
1. 5 - 2.0 mm | 1. 5 mm
39
Onlay Isthmus width minimum:
1.5 mm
40
The milling software will ______ the inside of a crown prep if there are sharp angles, etc
Over mill *so it will seat
41
The milling software will _____ the marging
Under mill *so will not seat
42
T/F | Best to have a roller coaster effect on Onlay preps
True
43
T/F | There is no retention/resistance form in on Onlay prep
True *modern bonding allows for this
44
The butt joint in bonding an Onlay should be ____ degrees
80-90
45
Why is a 2nd plane of reduction important to in a Ceramic Onlay prep?
maintains thickness of restoration - avoids fracture
46
ACC prep design (Crown!) Anterior incisal: Posterior fissure: Posterior cusp:
1. 5 mm 1. 5 mm 2. 0 mm
47
What shouldn't you use on Provisionals for All ceramic Onlays?
No eugenol
48
CAD CAM takes the place of what 3 traditional lab steps?
Models, dies, wax ups
49
Before Isolate/Bond an Onlay:
Try in
50
HF acid only works on _______ So, wouldn't work on what?
Glass Zirconia
51
3 Bonding materials, starting with the best one:
Total Etch bonding resins Self Etch bonding resins Glassionomers
52
What bonding system allows for the most conservative, highly tapered prep? 1 Brand name?
Total Etch Nexus III
53
What would you use Glass-Ionomer bonding system with?
Zirconia
54
After try-in, what has the Ceramic Onlay been contaminated with?
salivary phospholipid biofilm
55
Zirconia has a strong affinity to bind with what?
phosphate
56
To clean after Try In, use ultrasound for ___ minutes and Ivoclean for ___ seconds
2 minutes 20 secs
57
T/F | Ivoclean creates a larger surface by adding small metal oxide particles and has a high affinity for proteins
True
58
Pre-bonding, what not to use with Silica based ceramics?
Sandblasters
59
Only use sandblasters with what?
Zirconia
60
Do not clean the inside of a ceramic with _____ to remove biofilm Use _____ to before applying Silane agent
phosphoric acid Ethyl alcohol
61
What product has added dopants to Zirconia for better translucency?
BruxZir
62
How long should Silane be applied? Keep excess within the ____ of the crown
60 secs margins
63
In a Selective Etch Technique, etch enamel margins only _____ secs Use ______ Lastly apply 1 layer of ______
20 CHS SE primer
64
Tack cure CAD restoration for how long? Then remove doughy flash with what? Final cure how long?
1 second floss 60 secs
65
What is recommended post cementation?
Radiographs *find IP resin flash
66
Total etch systems are what generations? Self etch systems are what generations?
4th, 5th 6th, 7th
67
4th Gen has how many steps? 5th gen?
3 - Etch, primer, bond 2 - Etch, primer/bond
68
What is the 4th Gen system we used?
Optibond FL
69
All in One Self Etch systems (6th gen), what can be lowered enough to etch undercut enamel? What is retained? What might be entrapped into the hybrid layer?
pH Smear layer - this is a con Water
70
T/F | 6th gen systems are Prompt L-Pop, One-Up Bond F
True
71
The single component system (7th gen) is convenient and less technique sensitive but has what disadvantages?
Smear layer retained Water absorbed into resin
72
T/F | There is no pH incompatibility with resin cements
True
73
Bonding Adhesive systems remove the smear layer with what?
pre conditioning gel
74
Everything we restore eventually fails due to what?
Hydrostatic pressure
75
Dentin Bonding Primers denature what?
Collagen
76
Resins have what relationship with water?
Hydrophobic
77
Because Intertubular dentin is the majority of Dentin Bonding, seal with what to avoid water/hydrostatic pressure? *peritubular dentin more mineralized
GI liner
78
What is in the smear layer? Can you rinse it away?
Debris, bacteria NO
79
What removes the smear layer? What bonding system does not?
Etch and rinse steps Self etch
80
What binds the restorative matl to normal dentin?
Hybrid layer
81
T/F | Over time water trees develop
True
82
What activity increases hydrolysis of Collagen, causes Gap Separation?
MMP
83
What can you decrease MMP wit to increase bonding longevity?
CHX
84
T/F | Polymerization shrinkage can lead to restoration failure
True
85
Bonded resin surface / un-bonded resin surface
C factor
86
What does a high C factor mean?
more shrinkage/strain
87
T/F | Composite curing pulls away from the tooth
True
88
The filler in Optibond solo plus makes it milky and does what?
Increases elasticity
89
Why don't you wet your instrument with a bonding agent during placement?
Resins contain HEMA - will discolor composite
90
For deep restorations, what 4 steps?
Liner Etch Gluma - 20 secs Optibond solo plus - 15 secs
91
Gluma is a ________ made specifically for ______
desensitizer dentin
92
T/F | Gluma is made from glutaraldehyde
True
93
Research reveals the 2 most important things to do when curing are:
Correct light placement Finger rest
94
4 curing light systems by cure time (start with fastest)
Lasers Xenon Plasma Arc Metal Halide LED
95
3 ways to reduce internal stresses:
soft-start polymerization Incremental additions Stres breaking liner
96
A modified flowable composite that can fill the entire gingival and pulpal floor before being cured: *up to 4 mm
Bulk Fill Composites
97
If Bulk Fill is the new paradigm, why are we still doing layered technique? 3 reasons
Wear resistance is poor Shrinkage greater than conventional composites (increases C factor) Microleakage greater
98
What is the main advantage to Bulk Fill (up to 4mm) technique?
Best marginal adaption
99
T/F | Best technique is still to use Flowable 1st, then add layers - will get best marginal adaption
True
100
What are the BioActive restoratives?
Giomers
101
Giomers have a surface property that does what?
Is bio-reactive *neutralizes acids, etc
102
T/F | The future may be Giomers with Surface Sealers with nano-fillers
True
103
Each tooth should appear ____ times narrower than its mesial neighbor from the frontal view _____ in California
1. 618 | 1. 4
104
The top of the smile line:
Zenith
105
Face height is the Rule of...
1/3rds
106
Lower Face height is the rule of ...
2. 3rds | * upper lip 1/3, lower lip to chin 2/3
107
T/F | Youthful teeth have Prikymata and Mamelons
True
108
T/F | A rounded face will have wider teeth proportionally and a longer face will have narrower teeth proportionally
True
109
Esthetic inclinations: CI's LI's: Canines:
vertical mesially inclined vertical
110
T/F | Primary planes align with the long axis of the tooth and have a slight mesial prominence
True
111
T/F | With a normal smile, pts maxillary incisal edge should just lightly touch or miss lower lip
True
112
T/F | The Zenith of each tooth should be slightly distal to the center
True
113
Tx sequence basics Perio Health: Caries Control: TMJ/Occlusal Stability: Specialty Tx: Color: Fixed/removeable Tx: Ceramics: Composites: Maintenance:
Phase 1 Phase 1 Phase 2 Phase 2 Phase 3 Phase 4 Phase 5 Phase 5 Phase 6
114
The Smear Layer may reduce dentin permeability be as much as ___%
86
115
What bur creates a very thick smear layer?
Diamond

Tim's Cards (140 decks)

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