Op 2 - Inlays and Onlays Flashcards by A G

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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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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Q

What are the 4 possible materials for inlays/onlays?

A

Metal
Ceramic
Resin
Metal-ceramic

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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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Q

Which inlay material would you use?

Intact B and L enamel

A

Ceramic

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Q

Which inlay material would you use?

Demand for esthetic

A

Ceramic

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Q

Which inlay material would you use?

Low caries rate

A

Ceramic
Metal

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Q

Which inlay material would you use?

Sufficient tooth structure

A

Ceramic
Metal

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Q

Which inlay material would you use?

Small carious lesion (max. 2 surfaces)

A

Metal

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Q

Which inlay material would you use?

Adequate dentinal support

A

Metal

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Q

Which inlay material would you use?

Deep subgingival prep

A

Metal

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Q

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

Bruxism (high functioning pts)

A

Ceramic

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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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Q

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

Deep subgingival preps

A

Ceramic

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Q

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

High caries index

A

Ceramic
Metal

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Q

Which inlay material is contraindicated in the following situation?

Insufficient tooth substance

A

Ceramic
Metal

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Q

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

Poor plaque control

A

Ceramic
Metal

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Q

Which inlay material is contraindicated in the following situation?

MOD carious lesions

A

Metal

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Q

Which inlay material is contraindicated in the following situation?

Poor dentin support

A

Metal

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Q

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

A

1mm

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Q

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

A

6-10

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Q

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

A

dovetail; proximal

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Q

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

A

minimal

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Q

Where should proximal grooves be on metal inlay preps?

A

Facially and lingually on axial wall

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

1-1.5mm; 0.6mm

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

45

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

90

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

Bulk material needed to prevent fracture

Are grooves needed for ceramic inlays?

NO

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

round

__________ inlays leak less than __________ inlays.

Ceramic; resin

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

Resin

What are the 2 main advantages of gold inlays?

Longevity Superior properties

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

Ceramic

Which onlay material would you use? Demand for esthetics

Ceramic

Which onlay material would you use? Intact B and L enamel for proper bonding

Ceramic

Which onlay material would you use? Short clinical crown

Ceramic

Which onlay material would you use? Low caries rate

Ceramic Metal

Which onlay material would you use? Worn or carious teeth w/ intact B and L cusps

Metal

Which onlay material would you use? MOD amalgam replacement

Metal

Which onlay material is contraindicated in the following situation? Short clinical crowns or extruded teeth

Metal

Which onlay material is contraindicated in the following situation? Lesions extending beyond B and L line angles

Metal

The following are advantages of which material? Esthetic Durable

Ceramic

The following are advantages of which material? Support of cusps High strength Longevity

Metal

The following are disadvantages of which material? Abrasive Difficult to adjust occlusion Expensive Wear of luting agent

Ceramic

The following are disadvantages of which material? Lacks retention Less conservative May display metal Expensive

Metal

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

1.3mm

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

0.8mm

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

1.5mm

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

1mm

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

1mm

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

45; functional; non-functional

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

2mm

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

1.5mm

Is there a ledge on functional cusps for ceramic onlays?

NO

Which material for inlays/onlays? Depend mainly on adhesives for retention (need more intact enamel for bonding)

Ceramic Resin

Which material for inlays/onlays? Depend on retention and resistance form

Metal

Which product can be used for a provisional inlay?

Fermit

Light cure resin temp filling material for inlay preps

Fermit

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

Fermit

Stiffer formulation for use in cusp replacement

Fermit-N