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Operative II > Class II Composite Prep > Flashcards

Class II Composite Prep Flashcards

1
Q

Is composite or amalgam newer?

A

Composite

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2
Q

What are the 4 indications for composite?

A

Esthetics
Light occlusal contacts
Smaller restorations
Isolation

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3
Q

Does a composite prep usually end up smaller than amalgam?

A

Yes

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4
Q

Does composite support occlusion?

A

No

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5
Q

What are the 7 contraindications to composite?

A 
Heavy occlusal forces
Occlusal contacts entirely on composite
Restorations extending to root surface
Deep subgingival margins
Diet
Poor oral hygiene
Unable to isolate
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6
Q

Is there more or less fluid in the deeper portions of the dentin?

A

More fluid

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7
Q

What is the huge advantage to composite?

A

Bonding

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8
Q

enamel ground with a bur has ____ suface area

A

Increased surface area

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9
Q

Layer of debris from when the tooth is cut

A

Smear layer

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10
Q 
◦Prepares the tooth
◦Removes smear layer
◦INCREASES RETENTION
◦Steps:
◦Apply 30-40% phosphoric acid on enamel
◦15 seconds
◦rinse
A

Acid Etching

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11
Q

____ acid etch pattern:

◦Most common, “honeycomb”◦Dissolution of prism CORES

A

Type 1

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12
Q

What portion of the tooth has the highest bonding strength?

A

Occlusal third

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13
Q

What portion of the tooth has the lowest bonding strength?

A

Cervical third

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14
Q 
Advantages of \_\_\_\_\_\_
Esthetic 
Conserves tooth structure
Bonding◦Reduced microleakage and recurrent decay◦Increased retention
No metal
◦No mercury arguments from patients
◦No corrosion
◦No galvanic shockCan be economical
◦Vs. crowns and inlays/onlays
Preparation may be more forgiving
◦RESTORATION IS NOT!!!
A

Composite

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15
Q 
Disadvantages of \_\_\_\_\_
Low modulus of elasticity
Porous
More technique sensitive placement
More time-consuming placement
Microleakage
May stick to instrument, resulting in voids
Can’t place in bulk
Expensive compared to amalgam
A

Composite

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16
Q

Is composite more or less flexible

A

More flexible; Low modulus

17
Q

SHould you ever bevel dentin?

A

NO

18
Q

____ is the term used to describe the stiffness of a material

A

Modulus of elasticity

19
Q 
The following are places to place \_\_\_\_\_\_\_
Enamel margins
◦Especially gingival margin-vulnerable if margin is on dentin, cementum, or sides of enamel rods
◦Ends of enamel rods is ideal
Premolars or small molars
◦Ideal preparations 
Interim restoration
◦Before crown is placed
Preventative resin restoration
Cingulum rest preparations for RPD
A

Composite restorations

20
Q

Conservative Technique
◦Place composite in carious occlusal pits
◦Seal remaining pits and fissures

A

Preventative resin restoration

21
Q

What is the main reason for beveling cavosurface margins at gingival?

A

Greater surface area for bonding

22
Q

Is Eugenol or Copalite used in composite restorations?

A

No

23
Q

A physical mixture of materials

A

Composite

24
Q

If there is more filler in a composite, there is _____ strength

A

MOre strength

25
Q

_______ composites
◦Less concern over esthetics, more concerned with strength
◦More filler= more strength
◦=less esthetic

A

Posterior composites

26
Q

_____ composites:
Increased size of particles
Stronger
Less aesthetic

A

Macrofill

27
Q

____ composites:
Smaller sizes
Less strength
More aesthetic leading to a better polish

A

Microfill

28
Q

____ composites:

mix of micro and macro fill

A

Hybrid

29
Q

______ composites:
◦Particles size 0.005-0.01 micrometers
◦This is what we’re most commonly talking about when we say “composites”

A

Nanofill

30
Q

_____ composite:
◦Smaller particles, fewer particles◦Inferior strength and wear resistance
◦Great for using at gingival margin
◦Low elastic modulus
◦Sometimes used for Class V
◦Currently some products being marketed as bulk-fill
-More flexible

A

Flowable

31
Q

What is the most important thing when placing a composite?

A

Isolation

32
Q

Is breaking the buccal contact necessary on composite prep?

A

No

33
Q

Which 2 contacts must be broken on a class 2 composite prep?

A

Lingual and gingival

34
Q

Where should a flare be placed on a composite restoration of a max pm?

A

Facial

Operative II (11 decks)

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