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Dental Health and Disease (DHD) > 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
GIC - summary?
Composite > GIC mechanically but F release | Need protection from moisture contamination and desiccation
26
ZPC - constituents?
Zinc oxide + poly(acrylic acid)
27
ZPC - mechanical properties?
Lower modulus of elasticity and less likely to fracture under heavy load
28
ZPC - indications?
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
ZPC - summary?
Non-toxic to pulp | Bond chemically to dentine
30
ZPC - key advantages?
Bonds tissue and resto material | Long-term durabilty
31
ZPC - key disadvantages?
Hard mixing Opaque Hard manipulation ill-defined set
32
ZOE - constituents?
Zinc oxide + eugenol -> Zinc eugenolate
33
ZOE - presentations?
Power/liquid | Paste/paste
34
ZOE - reinforced with?
Temporary cement EBA-reinforced Zinc Oxide Eugenol cement Ortho-ethoxybenzoic acid (EBA)
35
ZOE - key advantages?
Needs to be used in 2mm to function as base Bactericidal Bland sedative Reduces leakage and pulpal inflammation
36
ZOE - key disadvantages?
``` May contains air voids Never place on vital pulp - cytotoxic Mechanical retention Poor interaction with resin composite Opaque ```
37
ZOE - indications?
``` Temporary restorations Base Temporary luting Long-term temporary restorations Root end filling Endodontic sealer Impression material Long-term temporisation ```
38
ZOE - contraindications?
``` Temporary restorations in non-retentive cavities Direct on pulp Under/With resin composite Definitive luting Exposure to oral fluids ```
39
Compomer - constituents?
Dimethacrylate and difunctional resin monomer containing both carboxyl and methacrylate groups
40
Compomer - mechanical properties?
Lower compressive, flexural strengths and elastic moduli compared to composite
41
Compomer - bonding?
Intermediate bonding system
42
Compomer - key advantages?
``` Release F (much lower than GIC/RMGIC) Less wear resistance than composite ```
43
Compomer - key disadvantages?
Staining from oral fluids
44
Compomer - indications?
``` C III - strong and aesthetic CV - flexible for abfraction lesions Fissure sealants - flowable Luting - metal based and indirect restorations Resto deciduous (bonding) ```
45
Compomer - contraindications?
``` 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
CaOH cement - base vs lining?
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
CaOH - indications?
Lining
48
CaOH - constituents?
CaOH + salicylate ester forming Ca disalicylate complex
49
CaOH - mechanical properties?
Weakest material Deforms Thin sections only
50
CaOH - key advantages?
Formation of reparative (tertiary) dentine | Forms physical barrier over exposed pulp allowing material to seal tubules
51
CaOH - key disadvanatges?
``` Low compressive strength No adhesion to dentine Local irritation Exothermic reaction Shrinkage ```
52
CaOH - indications?
Deep cavity over pulpal floor | Indirect and direct pulp capping
53
Ca3SiO5 - physical properties?
Compressive and hardness to dentine Flexural modulus as dentine High dimensional stability Doesn't discolour
54
Ca3SiO5 - indications?
``` 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
Ca3SiO5 - contraindications?
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
Composite - constituents?
Resin + filler bound together by a silane coupling agent
57
Composite - key advantages?
``` Aestehtics Minimally invasive Command set Repaired Bonded to enamel and dentine Reduced microleakage Lowe thermal conductivity ```
58
Composite - key disadvantages?
``` 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
Composite - presentation?
Universal - all applications Flowable - for ultraconservative restorations Packable - posterior situations
60
Universal composite - indications?
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
Universal composite - contraindications?
Aesthetics are critical Moisture control can't be achieved Inadequate enamel
62
Flowable composite - mechanical properties?
``` Compared to universal: Less compressive strength Less wear resistant Greater shrinkage Lower modulus of elasticity (increased flexibility) ```
63
Flowable composite - indications?
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
Flowable composite - contraindications?
High stress situations (edges and cusps) Resto of anything greater than small C I Any C II Moisture control can't be achieved
65
Packable composite - mechanical properites?
Increases fracture resistance | Increased void risk
66
Packable composite - indications?
Posterior use
67
Bulk fill composite - mechanical properties?
``` Good wear resistance Strength Sculptable Good radiodensity Good adaptation for cavity Fewer voids Increased modulus of elasticity Reduced shrinkage Bond resin-based materials ```
68
Bulk fill composite - disadvantages?
Less compressive, decreased hardness and decreases wear resistance
69
Bulk fill composite - indications?
``` 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 ```

Dental Health and Disease (DHD) (23 decks)

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