Inlay/Onlay preps and restorations Flashcards Preview

SP 16 - Operative final > Inlay/Onlay preps and restorations > Flashcards

Flashcards in Inlay/Onlay preps and restorations Deck (14)
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1

What are the two major materials used in Inlays/Onlays?

Metal
Ceramic

2

What are the indications for Metal In/Onlays?

Large restorations
Endo treated teeth (Esp posterior)
Teeth at risk for fracture
Dental rehab with cast metal alloys
Diastema closure and occlusal plane correction
Removable abutment

3

What are the contraindications for metal In/Onlays?

High caries rate
Young patients (large pulps)
Esthetics
Small restorations - more conservative options

4

What are the advantages of metal Inlays/Onlays?

Strength
Biocompatable
Low wear
Control of contours/contacts

5

What are the disadvantages of metal Inlays/Onlays?

Lots of apts and chair time
Temp restorations
Cost
Technique sensitive
Splitting forcaes (inlays only)

6

What makes a metal Inlays/Onlays prep different than and amalgam prep?

Wider isthmus (about 2mm)
Divergent walls
1mm interproximal clearance
45' bevel

7

What is the difference between an inlay and an onlay?

Onlays cover at least one cusp

8

What are the indications for a ceramic Inlays/Onlay?

Esthetic
Large defects
Large previous restoration

9

What are the contraindications for ceramic Inlays/Onlays?

Heavy occlusal forces
Inability to maintain a dry field
Deep subgingival prep

10

What are the advantages for ceramic Inlays/Onlays?

Improved physical properties
Variety of materials/techniques
Wear Resistance
Reduced polymerizaiton shrinkage
Support of remaining tooth structure
More precise control of contours/contacts
Biocompatability
Good tissue response
Increased auxiliary support

11

What are the disadvantages of ceramic Inlays/Onlays?

Increased cost/time
Technique sensitive
Difficult try-in/delivery
Ceramic is brittle
Wear of opposing dentition and restorations
Short clinical track record
Low potential for repairs

12

What are the different types of ceramic Inlays/Onlays?

Feldspathic porcelain
Pressed-glass
Lithium disilicate
CAD/CAM
Composite

13

How are ceramic Inlays/Onlay preps different from the metal ones?

Deeper (about 2mm)
No bevels - 90' exit angles
Less conservative than metal

14

What should the tapering be for ceramic Inlays/Onlays?

6'-10'
Over tapering causes thinner occlusal margins and increased marginal stress