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CSP3 YR5- Restorative > Dental Material Pros/Cons/Indications/Contras > Flashcards

Dental Material Pros/Cons/Indications/Contras Flashcards

1
Q

RMGIC - constituents? resin?

A

GIC + water-soluble resin and modified poly(acryclic acid)

HEMA

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2
Q

RMGIC - key advantages?

A

Seals dentinal tubules and decreases risk of microleakage
Sustained release of F (increases degrade)
Ca and collagen bonding
Long working time
Limited moisture sensitivity
Releases bacteriostatic benzoyl iodides/bromides

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3
Q

RMGIC - key disadvantages?

A 
Prone to staining with time
Shrinkage
Swelling (moisture uptake)
Exothermic on curing
Monomer leach
Benzoyl iodides/bromides cytotoxic
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4
Q

RMGIC - indications?

A

Small-sized C I
C III and V
Non-carious tooth surface loss
Only few shades available
Core build-ups (>50% tooth remaining)
Open and Closed sandwiches
Dressing (alternative to GIC for command set)
Luting***
Restore deciduous (minimally invasive and F)
Linings (seal tubules, bacteriostatic, F and radiodense)
Bonding dental amalgam
Blocking undercuts for indirect restorations (bond tissue and easy handling)

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5
Q

RMGIC - presentations?

A

Powder/liquid
Encapsulated (less voids)
Paste/paste system (increase wear resist)

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6
Q

RMGIC - summary?

A 
Limited advantages over GIC
HEMA cytotoxic
Improved F release
Mech props > GIC
Particularly for luting restorations
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7
Q

RMGIC - contraindications?

A

For direct placement on both pulpal and periradicular vital tissue

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8
Q

Amalgam - constituents?

A

Alloy + mercury

Alloy containing silver, tin and copper + mercury

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9
Q

Amalgam - key advantages?

A

Compressive strength
Early strength
Spherical alloy stronger

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10
Q

Amalgam - key disadvantages?

A

Tensile strength
Creep y1
Corrosion y1
High thermal diffusivity

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11
Q

Amalgam - indications?

A

Class I and II cavities
(Class III and V)
Cores for cast restorations

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12
Q

Amalgam - cavity design?

A 
Depth - 2mm
Rounded line angles
Cavo-surface angles 90-110
No unsupported enamel
Retention form (undercuts and slots)
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13
Q

Amalgam - benefits of bonding? bonding material?

A

Increased retention and fracture resistance
Decreased microleakage, trauma, inflammation, PostOP sensitivity, recurrent caries, cuspal deflection
Resin based composite adhesive
Little in vivo evidence

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14
Q

Amalgam - presentation?

A

Encapsulated - easier mix, dispense

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15
Q

Amalgam - adverse effects?

A 
Enamel discolouration (dentine permeability)
Amalgam tattoo (migrate to soft tissue)
Lichenoid (hypersensitivity)
Galvanic cell (2 different metals and saliva)
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16
Q

Amalgam - contraindications?

A

Pregnant women
Allergy
Aesthetics
Objection

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17
Q

Amalgam - summary?

A

Higher copper, spherical or admixed alloy performs better

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18
Q

GIC - name? constituents?

A

Glass Polyalkenoate cement

Glass and polyacrylic acid

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19
Q

GIC - mechanical properties?

A

Compressive strength = dentine

Strength increases with time

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20
Q

GIC - bonding?

A

Chemical bonding: H bond with collagen and form a Ca polyacrylate salt replacing the hydroxyapatite structure
Bonds can reform

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21
Q

GIC - indication?

A 
Intervisit endodontic material
Restore deciduous 
Atraumatic restorative technique
Tunnel preps
C III 
CV (especially nn-carious tooth loss)
Long-term temporisation/intermediate restoration
Core build-ups
PRR
Base/Liner
Dressing (non-retentive cavity or composite as final material) 
Fissure sealants
Luting (crown and bridge retainers)
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22
Q

GIC - key advantages?

A 
F release (can be replenished)
Less staning than composite (but less shade variation)
Composite > GIC for aesthetics
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23
Q

GIC - contraindications?

A

High load C I or C II
Large posterior cavities
Core build ups with little tooth
Aesthetics

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24
Q

GIC - presentation?

A

Encapsulated

Powder/liquid

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25
Q

GIC - summary?

A

Composite > GIC mechanically but F release

Need protection from moisture contamination and desiccation

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26
Q

ZPC - constituents?

A

Zinc oxide + poly(acrylic acid)

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27
Q

ZPC - mechanical properties?

A

Lower modulus of elasticity and less likely to fracture under heavy load

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28
Q

ZPC - indications?

A

Temporary restorations (especially non-retentive cavities due to chem bonding, no entering tubules and it’s a sedative)
Future restoration to be composite
Bases (seales dentine due to adhesive props but superseded by RMGIC)
Definitive luting of metallic/ceramic crowns
Cementation of ortho bands

29
Q

ZPC - summary?

A

Non-toxic to pulp

Bond chemically to dentine

30
Q

ZPC - key advantages?

A

Bonds tissue and resto material

Long-term durabilty

31
Q

ZPC - key disadvantages?

A

Hard mixing
Opaque
Hard manipulation
ill-defined set

32
Q

ZOE - constituents?

A

Zinc oxide + eugenol -> Zinc eugenolate

33
Q

ZOE - presentations?

A

Power/liquid

Paste/paste

34
Q

ZOE - reinforced with?

A

Temporary cement
EBA-reinforced Zinc Oxide Eugenol cement
Ortho-ethoxybenzoic acid (EBA)

35
Q

ZOE - key advantages?

A

Needs to be used in 2mm to function as base
Bactericidal
Bland sedative
Reduces leakage and pulpal inflammation

36
Q

ZOE - key disadvantages?

A 
May contains air voids
Never place on vital pulp - cytotoxic
Mechanical retention 
Poor interaction with resin composite
Opaque
37
Q

ZOE - indications?

A 
Temporary restorations 
Base
Temporary luting
Long-term temporary restorations
Root end filling
Endodontic sealer
Impression material 
Long-term temporisation
38
Q

ZOE - contraindications?

A 
Temporary restorations in non-retentive cavities
Direct on pulp
Under/With resin composite
Definitive luting
Exposure to oral fluids
39
Q

Compomer - constituents?

A

Dimethacrylate and difunctional resin monomer containing both carboxyl and methacrylate groups

40
Q

Compomer - mechanical properties?

A

Lower compressive, flexural strengths and elastic moduli compared to composite

41
Q

Compomer - bonding?

A

Intermediate bonding system

42
Q

Compomer - key advantages?

A 
Release F (much lower than GIC/RMGIC)
Less wear resistance than composite
43
Q

Compomer - key disadvantages?

A

Staining from oral fluids

44
Q

Compomer - indications?

A 
C III - strong and aesthetic 
CV - flexible for abfraction lesions
Fissure sealants - flowable
Luting - metal based and indirect restorations
Resto deciduous (bonding)
45
Q

Compomer - contraindications?

A 
Aesthetics  (composite better)
Core-build ups (not strong enough)
Luting ceramics (fracture risk)
C I, II and IV (fracture risk)
Inter-visit restorations (poor sealing for microleakage)
46
Q

CaOH cement - base vs lining?

A

Base:
- function as a barrier against chemical irritation, providing thermal insulation and resists forces applied during condensation of restorative material (structural forms)
Lining:
- Placed as thin coatings and their function is to provide a barrier against chemical irritation (no thermal insulation) (no structural form)

47
Q

CaOH - indications?

A

Lining

48
Q

CaOH - constituents?

A

CaOH + salicylate ester forming Ca disalicylate complex

49
Q

CaOH - mechanical properties?

A

Weakest material
Deforms
Thin sections only

50
Q

CaOH - key advantages?

A

Formation of reparative (tertiary) dentine

Forms physical barrier over exposed pulp allowing material to seal tubules

51
Q

CaOH - key disadvanatges?

A 
Low compressive strength
No adhesion to dentine
Local irritation
Exothermic reaction
Shrinkage
52
Q

CaOH - indications?

A

Deep cavity over pulpal floor

Indirect and direct pulp capping

53
Q

Ca3SiO5 - physical properties?

A

Compressive and hardness to dentine
Flexural modulus as dentine
High dimensional stability
Doesn’t discolour

54
Q

Ca3SiO5 - indications?

A 
Placed on dentine and vital pulp tissue (pulpal cell proliferation)
Deep cavities
Reversible pulpitis (dressing)
Carious or iatrogenic exposure
Trauma
Pulpotomy in primary molars
Perforation repairs
55
Q

Ca3SiO5 - contraindications?

A

Don’t layer with GIC or ZOE
Don’t etch with H3PO4 (use selective)
Need >2mm of resin composite to mask opacity
Don’t desiccate

56
Q

Composite - constituents?

A

Resin + filler bound together by a silane coupling agent

57
Q

Composite - key advantages?

A 
Aestehtics
Minimally invasive
Command set
Repaired
Bonded to enamel and dentine
Reduced microleakage
Lowe thermal conductivity
58
Q

Composite - key disadvantages?

A 
Time consuming
Hydrophobic
Photophilic
Shrinkage
Technique sensitive
Decreased longevity with higher # of surfaces
Attract more bacteria than amalgam (unless well polished)
Difficult to finish
59
Q

Composite - presentation?

A

Universal - all applications
Flowable - for ultraconservative restorations
Packable - posterior situations

60
Q

Universal composite - indications?

A

C III
C IV
Incisal non-carious tooth surface loss
Reinforcing fibres for splinting
CV where retention is by undercut (carious)
C I and C II if indicated by manufacturer

61
Q

Universal composite - contraindications?

A

Aesthetics are critical
Moisture control can’t be achieved
Inadequate enamel

62
Q

Flowable composite - mechanical properties?

A 
Compared to universal:
Less compressive strength
Less wear resistant
Greater shrinkage
Lower modulus of elasticity (increased flexibility)
63
Q

Flowable composite - indications?

A

Small C I (with enamel only or small amount of dentine perm or decid)
CV (non-carious)
Repair ditched amalgam margins
Lining material (with packable composite)
Block undercuts (inlay prep)
Enhance bond between enamel and heavily filled composite at bottom of C II box
Ceramic repairs in non-stress situations
Repair bis-acryl composite temporary restorations

64
Q

Flowable composite - contraindications?

A

High stress situations (edges and cusps)
Resto of anything greater than small C I
Any C II
Moisture control can’t be achieved

65
Q

Packable composite - mechanical properites?

A

Increases fracture resistance

Increased void risk

66
Q

Packable composite - indications?

A

Posterior use

67
Q

Bulk fill composite - mechanical properties?

A 
Good wear resistance
Strength
Sculptable
Good radiodensity
Good adaptation for cavity
Fewer voids
Increased modulus of elasticity 
Reduced shrinkage 
Bond resin-based materials
68
Q

Bulk fill composite - disadvantages?

A

Less compressive, decreased hardness and decreases wear resistance

69
Q

Bulk fill composite - indications?

A 
Direct anterior and posterior resto
Lining under direct resto
Core build ups
Splinting
Indirect resto
Resto deciduous
Fissure seal and PRR
Repair defects in ceramic resto and temporaries

CSP3 YR5- Restorative (44 decks)

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