Inlays/onlays/veneers

Question 1

What are the 4 clinical stages of indirect restorations?

Answer 1

• Preparation
• Temporisation
• Impressions and occlusal records
• Cementation

Question 2

What are 2 advantages of Chairside restorations? (CAD/CAM)

Answer 2

• quick
• no temporary needed

Question 3

Describe an inlay?

Answer 3

intracoronal restoration made in lab

Question 4

3 materials for inlays?

Answer 4

• Gold
• Composite
• Porcelain

Question 5

5 indications of inlays?

Answer 5

• premolars and molars
• occlusal restorations
• mesioocclusal or disto-occlusal restorations
• Narrow MOD
• low caries rate

Question 6

What are 2 advantages of inlays over direct restorations?

Answer 6

• better material and margins
• less likely to deteriorate over time

Question 7

What are 2 disadvantages of inlays?

Answer 7

• Time
• Cost

Question 8

Describe an Onlay?

Answer 8

extra-coronal restoration made in lab

Question 9

3 materials of onlays?

Answer 9

• Gold
• Composite
• Porcelain

Question 10

2 indications for onlays?

Answer 10

• sufficient tooth substance loss
• Remaining tooth substance is weakened

Question 11

when is cast metal inlays/onlays are preferable to amalgam? 2

Answer 11

• higher strength is needed
• significant tooth recontouring is needed

Question 12

Give 4 cases where you would use an onlay?

Answer 12

• tooth wear cases to increase ovd
• fractured cusps
• restoration of root treated tooth
• replace failed direct restorations

Question 13

Why would you choose an onlay over a crown?

Answer 13

Less destructive than crowns

Question 14

Describe a veneer?

Answer 14

• A thin layer that is bonded to the labial or palatal surface of a tooth with resin
• Can be ceramic, gold or composite

Question 15

Give 5 indications of veneers?

Answer 15

• improve aesthetics
• change teeth shape or contour
• correct peg shaped laterals
• reduce or close proximal spaces and diastemas
• align labial surfaces of instanding teeth
• Enamel defects
• Discolouration

Question 16

Give 5 intrinsic causes of discolouration?

Answer 16

• non-vital teeth
• Ageing
• Trauma
• Medication - tetracycline
• Erosion and abrasoin
• Amelogenesis imperfecta

Question 17

5 contraindications to veneers?

Answer 17

• Poor OH
• High caries rate
• High lip line
• Gingival recession
• Heavy occlusal contacts

Question 18

What 3 reductions are done in preparing a tooth for veneers?

Answer 18

• Cervical reduction
• Midfacial reduction
• Incisal reduction

Question 19

Cervical reduction for veneer in mm?

Answer 19

0.3

Question 20

midfacial reduction for veneer in mm?

Answer 20

0.5

Question 21

Incisal reduction for veneer in mm?

Answer 21

1-1.5mm

Question 22

How would you prepare the margin for a veneer?

Answer 22

Chamfer margin supragingival or slightly subgingival

Question 23

4 types of veneer preparation?

Answer 23

• feathered incisal edge
• incisal bevel
• window
• overlapped incisal edge

Question 24

Give 3 alternatives to veneers?

Answer 24

• Micro-abrasion
• Resin infiltration
• Direct composite restoration

Question 25

What would you include in your veneer prep to aid retention?

Answer 25

Depth cuts

Question 26

Briefly explain the gurel technique?

Answer 26

* it is a technique for placing veneers with minimal preparation * Take impression and construct casts with wax ups of desired veneer * Construction of a vacuum formed stent on case * intra-oral mock up * prepare the mock up ( use depth cut)