Op 2 - Inlays and Onlays Flashcards

1
Q

A fixed intracoronal restoration made outside of a tooth to correspond to the form of the prepared cavity, which is then luted into the tooth

A

Inlay

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2
Q

A restoration that restores one or more cusps and adjoining occlusal surfaces or the entire occlusal surface and is retained by mechanical or adhesive means

A

Onlay

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3
Q

What are the 3 possible materials for inlays/onlays?

A

Metal
Ceramic
Metal

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4
Q

Inlay/Onlay restorations are recommended for teeth that are missing a large portion of tooth structure due to decay or fracture, but do not
require a _________

A

crown

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5
Q

Which inlay material would you use?

Intact B and L enamel

A

Ceramic

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6
Q

Which inlay material would you use?

Demand for esthetic

A

Ceramic

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7
Q

Which inlay material would you use?

Low caries rate

A

Ceramic
Metal

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8
Q

Which inlay material would you use?

Sufficient tooth structure

A

Ceramic
Metal

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9
Q

Which inlay material would you use?

Small carious lesion (max. 2 surfaces)

A

Metal

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10
Q

Which inlay material would you use?

Adequate dentinal support

A

Metal

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11
Q

Which inlay material would you use?

Deep subgingival prep

A

Metal

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12
Q

Which inlay/onlay material is contraindicated in the following situation?

Bruxism (high functioning pts)

A

Ceramic

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13
Q

Which inlay/onlay material is contraindicated in the following situation?

Inability to obtain moisture free environment for luting

A

Ceramic

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14
Q

Which inlay/onlay material is contraindicated in the following situation?

Deep subgingival preps

A

Ceramic

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15
Q

Which inlay/onlay material is contraindicated in the following situation?

High caries index

A

Ceramic
Metal

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16
Q

Which inlay material is contraindicated in the following situation?

Insufficient tooth substance

A

Ceramic
Metal

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17
Q

Which inlay/only material is contraindicated in the following situation?

Poor plaque control

A

Ceramic
Metal

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18
Q

Which inlay material is contraindicated in the following situation?

MOD carious lesions

A

Metal

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19
Q

Which inlay material is contraindicated in the following situation?

Poor dentin support

A

Metal

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20
Q

For a metal inlay, ideal occlusal depth is _____ mm in dentin. (flat floor)

A

1mm

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21
Q

For a metal inlay, divergence of buccal & lingual walls is ________ degrees total

A

6-10

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22
Q

For a metal inlay, you should place a _________ lock to resist _________ displacement

A

dovetail; proximal

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23
Q

For a metal inlay, buccolingual extension should be as ___________ as possible

A

minimal

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24
Q

Where should proximal grooves be on metal inlay preps?

A

Facially and lingually on axial wall

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25
Q

For a metal inlay, gingival floor should be ________ mm wide and ________ mm clearance from the adjacent tooth

A

1-1.5mm; 0.6mm

26
Q

For a metal inlay, you need a gingival and occlusal bevel of _______ degrees

A

45

27
Q

For a ceramic inlays and onlays, there is NO beveling around the margins, but you should have a ________ degree butt joint

A

90

28
Q

Why is a 90 degree butt joint needed for ceramic inlays?

A

Bulk material needed to prevent fracture

29
Q

Are grooves needed for ceramic inlays?

A

NO

30
Q

For ceramic inlays, ________ all internal line angles to allow better seating of the restoration, reduce stress concentrations, and reduce voids during cementation

A

round

31
Q

__________ inlays leak less than __________ inlays.

A

Ceramic; resin

32
Q

___________ inlays are easier to add on chair-side in case of open contact

A

Resin

33
Q

What are the 2 main advantages of gold inlays?

A

Longevity
Superior properties

34
Q

Which inlay material is highly abrasive to opposing teeth? (although newer generations have shown no wear of opposing enamel)

A

Ceramic

35
Q

Which onlay material would you use?

Demand for esthetics

A

Ceramic

36
Q

Which onlay material would you use?

Intact B and L enamel for proper bonding

A

Ceramic

37
Q

Which onlay material would you use?

Short clinical crown

A

Ceramic

38
Q

Which onlay material would you use?

Low caries rate

A

Ceramic
Metal

39
Q

Which onlay material would you use?

Worn or carious teeth w/ intact B and L cusps

A

Metal

40
Q

Which onlay material would you use?

MOD amalgam replacement

A

Metal

41
Q

Which onlay material is contraindicated in the following situation?

Short clinical crowns or extruded teeth

A

Metal

42
Q

Which onlay material is contraindicated in the following situation?

Lesions extending beyond B and L line angles

A

Metal

43
Q

The following are advantages of which material?

Esthetic
Durable

A

Ceramic

44
Q

The following are advantages of which material?

Support of cusps
High strength
Longevity

A

Metal

45
Q

The following are disadvantages of which material?

Abrasive
Difficult to adjust occlusion
Expensive
Wear of luting agent

A

Ceramic

46
Q

The following are disadvantages of which material?

Lacks retention
Less conservative
May display metal
Expensive

A

Metal

47
Q

For a metal onlay, place depth grooves on functional cusps of ________ mm deep, allowing 0.2 mm for smoothing

A

1.3mm

48
Q

For a metal onlay, place depth grooves on non-functional cusps of ________ mm deep, allowing 0.2 mm for smoothing

A

0.8mm

49
Q

What is the total occlusal reduction for functional cusps for metal onlays?

A

1.5mm

50
Q

What is the total occlusal reduction for non-functional cusps for metal onlays?

A

1mm

51
Q

For a metal onlay, prepare a ________ mm ledge on the functional cusp connecting to both proximal boxes

A

1mm

52
Q

For a metal onlay, bevel of _________ degrees should be made all around the margins of the prep including ___________ and _____________ cusps

A

45; functional; non-functional

53
Q

What is the total occlusal reduction for functional cusps for ceramic onlays?

A

2mm

54
Q

What is the total occlusal reduction for non-functional cusps for ceramic onlays?

A

1.5mm

55
Q

Is there a ledge on functional cusps for ceramic onlays?

A

NO

56
Q

Which material for inlays/onlays?

Depend mainly on adhesives for retention (need more intact enamel for bonding)

A

Ceramic
Resin

57
Q

Which material for inlays/onlays?

Depend on retention and resistance form

A

Metal

58
Q

Which product can be used for a provisional inlay?

A

Fermit

59
Q

Light cure resin temp filling material for inlay preps

A

Fermit

60
Q

Easy removal, no handpiece required - remains slightly elastic and removes completely with an explorer

A

Fermit

61
Q

Stiffer formulation for use in cusp replacement

A

Fermit-N