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BDS4 > Restorative tutorial > Flashcards

Restorative tutorial Flashcards

1
Q

Why do we use GI luting cement?

A
  • Cheap
  • Fluoride release
  • Self adhesive to the tooth
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2
Q

How does GI set?

A

Self-cured

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3
Q

When would you use a GI cement?

A
  • Metal ceramic crowns and bridges
  • Metal posts
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4
Q

How does RMGIC compare to GIC ?

A
  • RMGIC has a shorter setting time
  • RMGIC has a longer working time
  • RMGIC has a higher compressive and tensile strength
  • RMGIC has decreased solubility
  • RMGIC has a better bond strength to tooth
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5
Q

How does it set RMGIC set?

A

Self cure or dual cure

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6
Q

When would you use RMGIC?

A

MCC
metal posts

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7
Q

Describe the properties of composite luting cements

A
  • technique sensitive
  • need good moisture control
  • need to be used with a dentine bonding agent
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8
Q

What would you use with a composite luting cement when cementing a ceramic restoration?

A

Silane coupling agent

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9
Q

With what do etch a porcelain?

A

Hydrofluoric Acid

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10
Q

What does composite luting cement need to be cement to cement non precious metal ?

A

MDP or 4-Meta + metal surface need sandblast metal surface

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11
Q

Describe the different curing systems for composite luting cements?

A
  • Self-cured
  • Light-cured
  • Dual-cured
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12
Q

When would you use a dual cure composite luting cement?

A
  • Ceramic crowns and onlays
  • Composite Onlays
  • Fibre posts
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13
Q

When would you use a light cured composite resin luting cement?

A
  • Veneers as it sets on demand and allow for longer working time
  • good for cementing multiple units
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14
Q

When would you use a self-adhesive composite resin?

A

In resin retained bridges

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15
Q

What do we mean by anaerobic self cure ?

A
  • Only sets when oxygen is not in contact with the cement
  • It starts setting when there is close contact between two surfaced
  • Contains MDP
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16
Q

When would you use a self-etching composite resin cement?

A

Fibre posts
ceramic ,composite and porcelain indirect restorations

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17
Q

When do you place a post?

A

When there is not enough coronal tooth structure to support a core in order to retain the crown ( in an endodontically treated tooth)

18
Q

Why is placing a post in posterior teeth not advised?

A
  • Posts work better in straight canals , posteriors have curved ones which can lead to perforations
19
Q

What would you place in posterior teeth instead of a post?

A
  • Nayyar core which is an amalgam core
  • Onlay
20
Q

What is the ideal dimensions of post length?

A
  • It needs to extend beyond the level of the alveolar bone
  • At least 1:1 height ratio to crown
  • 3-5mm of GP must be in the canal apically
21
Q

What are the ideal dimensions of post width?

A
  • Less than 1/3d of the diameter of the root
22
Q

ferrule ideal dimensions?

A

1-1.5mm circumferential dentine

23
Q

3 post materials?

A
  • Metal - gold , SS , brass and titanium
  • Ceramics - alumina and zirconia
  • Fibre - glass, quartz and carbon
24
Q

4 disadvantages of metal posts?

A
  • Poor aesthetics
  • root fracture
  • corrosion
  • nickel sensitivity
25
Q

1 advantages of metal posts?

A

radiopaque on radiographs

26
Q

3 advantages of ceramic posts?

A
  • high flexural strength
  • high fracture toughness
  • good aesthetics
27
Q

2 disadvantages of ceramic posts?

A
  • difficult retrievability
  • root fracture is common
28
Q

4 advantages of fibre posts?

A
  • Flexible
  • Similar properties to dentine
  • good aesthetics
  • retrievable
  • bonds to dentine by DBA
29
Q

1 disadvantage of fibre posts?

A

Radiolucent on radiographs

30
Q

2 advatages of parallel posts?

A
  • High strength
  • good retention
31
Q

2 disadvantages of parallel posts?

A
  • Corrosion of SS
  • less conservative to the tooth and may cause perforations during preparation
32
Q

What is the advantage of threaded posts?

A
  • high retention
33
Q

disadvantage of threaded post?

A

High stress generated in the canal causing fracture

34
Q

How do explain why you are placing a post?

A
  • It is the last thing that can be done to the tooth other than extraction to keep it in place as we are placing the post to make the tooth stronger to withstand the crown on top of it
35
Q

What are the associated risks with placing posts? (6)

A
  • Restoration failure
  • Root fracture - occlusal load can be the issue
  • Post fracture
  • Risk of debonding
  • Perforation
  • limited future treatment -
36
Q

If a patient has a history of deep pocketing or swelling and the tooth has been RCT , what other might cause this other than pariapical pathology?

A
  • Root fracture
  • Lateral perforation
37
Q

What other clinical tests would you do beyond SOCRATES?

A
  • Tender to percussion
  • Sinus
  • Pocket depth
  • Mobility
  • Sensibility test - ECT and EPT
  • Tooth slooth and transillumination (for fracture)
38
Q

Would you take sensibility testing for root treated teeth?

A

NO

39
Q

When would you use a bitewings radiograph?

A
  • Caries
  • Endodontic status
  • Periodontal bone loss (not advanced)
  • Restorations overhangs
40
Q

When would you use a periapical radiograph?

A
  • Caries
  • Periodontal bone loss
  • Restoration overhangs
  • Endodontic status
  • PA pathology
41
Q

When would you use OPT (full or half)

A
  • Periodontal bone loss
  • Endodontic status
  • PA pathology
  • Wisdom tooth
  • assessment
  • TMJ

BDS4 (68 decks)

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