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BDS3 Operative Dentistry > Inlays, Onlays and Veneers > Flashcards

Inlays, Onlays and Veneers Flashcards

1
Q

What is an indirect restoration?

A

A restoration fabricated outside the mouth by a technician in a laboratory

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2
Q

Give examples of indirect restorations

A
  • crowns
  • bridges
  • posts and cores
  • inlays and onlays
  • veneers
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3
Q

What are the advantages of chair side indirect restorations?

A
  • quick
  • no temporary needed
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4
Q

What is an inlay?

A
  • an intra-coronal restoration made outside the mouth
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5
Q

What materials can be used for inlays?

A
  • gold
  • composite
  • porcelain
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6
Q

What cases would an inlay be used?

A
  • occlusal cavities
  • occlusal/interproximal caries
  • replacement of failed direct restorations
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7
Q

What are the indications for an inlay?

A
  • premolars or molars
  • occlusal restorations
  • mesio-occlusal or disto-occlusal restoration
  • MOD if kept narrow
  • low caries rate
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8
Q

What are the advantages of using an inlay over a direct restoration?

A
  • superior materials and margins
  • won’t deteriorate over time
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9
Q

What are the disadvantages of using an inlay over a direct restoration?

A
  • higher cost
  • takes more time
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10
Q

Give the dimensions for the preparation of a ceramic inlay

A
  • 1.5-2mm isthmus width
  • 1.5mm depth
  • at least 1mm shoulder or chamfer margin
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11
Q

Give the dimensions for a gold inlay prep

A
  • 1mm isthmus width
  • 1.5mm depth
  • 0.5 mm chamfer margin
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12
Q

briefly outline the temporisation and impression for an inlay

A
  • take impressions and occlusal records
  • fit temporary restoration
  • send impressions and occlusal records to lab for fabrication of restoration
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13
Q

What would you include on a lab prescription card for an inlay?

A
  • pour impressions
  • mount casts

construct restoration:
- tooth FDI notation
- material
- thickness
- shade
- characteristics

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14
Q

What cements can be used for a gold inlay?

A
  • aquacem
  • panavia
  • RMGI (RelyX)
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15
Q

What materials can be used to cement ceramic inlays?

A
  • NX3 (nexus)
  • ABC
  • Rely X unicem self adhesive cement
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16
Q

What is an onlay?

A
  • an extra coronal restoration made in lab
  • like inlays but with cuspal coverage
  • height of cusps should be reduced during preparation
17
Q

Give the indications for an onlay

A
  • sufficient occlusal tooth substance loss
  • buccal and/or palatal/lingual cusps remaining
  • remaining tooth substance weakened due to caries, pre existing restoration
  • MOD with wide isthmus
18
Q

When would a cast metal onlay or inlay be preferable to amalgam?

A
  • Higher strength needed
  • significant tooth recontouring required
19
Q

give the cases when an onlay could be used

A
  • tooth wear to increase OVD
  • fractured cusps
  • restoring root treated teeth
  • replacement of failed direct restorations
20
Q

What occlusal reductions would you make for a porcelain onlay preparation?

A
  • non working cusp = 1.5mm
  • working cusp = 2mm
    • proximal box if required = 1mm
21
Q

What occlusal reductions would you make for a gold onlay preparation?

A
  • non working cusp = 0.5mm
  • working cusp = 1mm
  • proximal box if required = 1mm
22
Q

What dimensions are required for the margins for a porcelain onlay prep?

A

1mm shoulder or chamfer

23
Q

What dimensions are required for the margins for a gold onlay prep?

A

0.5mm chamfer

24
Q

Outline what you would do during a second onlay or inlay appointment

A
  • remove temporary restoration
  • isolate, clean and dry prepared tooth
  • try in restoration, assess fit, adaptation, occlusion etc
  • address any problems if any
  • cement
  • minor occlusal adjustments if necessary
25
Q

What are the alternatives to inlays or onlays?

A

large direct restorations
- amalgam
- composite
- GI

crowns
extraction

26
Q

What is a laminate veneer?

A

A thin layer of cast ceramic that is bonded to the labial or palatal surface of a tooth with resin

27
Q

What materials can be used for a laminate veneer?

A
  • ceramic
  • composite
  • gold
28
Q

Give the indications for veneers

A
  • improve aesthetics
  • change teeth shape and/or contour
  • correct peg-shaped laterals
  • reduction or closure of proximal spaces and disastemas
  • align labial surfaces of instanding teeth
29
Q

Give intrinsic indications for veneers

A
  • non-vital teeth
  • ageing
  • trauma
  • fluorosis
  • hypoplasia or hypomineralisation
    -ameleogenesis imperfecta
  • erosion and abrasion
30
Q

What are the contraindications for veneers?

A
  • Poor OH
  • high caries rate
  • gingival recessions
  • root exposure
  • high lip lines
  • ## if extensive prep needed (>50% of surface area no longer in enamel)
31
Q

What incisal reduction level is required for a veneer preparation?

A

1-1.5mm

32
Q

What mid facial reduction level is required for a veneer prep?

A
  • 0.3mm
  • slight chamfer margin
  • within enamel
  • supra gingival or slightly subgingival
33
Q

what mid facial reduction level is required for a veneer prep?

A
  • 0.5mm
  • within enamel
34
Q

Give the name of the technique which uses minimal preparation for Veneers

A

The Gurel technique

35
Q

What cements can be used for a veneer

A
  • NX3 (Nexus)
  • ABC
  • Relyx unicem
36
Q

Outline the steps required in the first appointment for an inlay or onlay

A
  • LA
  • make reduction template
  • impression for temporary
  • tooth prep
  • make temporary
  • impressions, bite registration and record shade
  • cement temporary
37
Q

Outline the steps required in the first appointment for a veneer if tooth preparation is required

A
  • LA if necessary
  • make putty index
  • impression for temporary
  • tooth prep
  • make temporary
  • impressions, bite registration and record shade
  • cement temporary
38
Q

Outline the steps required in the 2nd appointment for veneer

A
  • remove temporary if provided
  • isolate, clean and dry prepared tooth
    -try in and assess fit, adaption and occlusion
  • address problems if any
  • cement
39
Q

Give alternatives to veneers

A
  • no treatment
  • crowns
  • direct composite restorations

BDS3 Operative Dentistry (5 decks)

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