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Resto 2 > Lec 6 Liners and Bases > Flashcards

Lec 6 Liners and Bases Flashcards

1
Q

Material applied to the inside of the floor/wall of a cavity, for protection of the pulp.

A

Liner

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2
Q

Used beneath permanent restorations to enhance recovery of injured pulp or to protect it from thermal shock, galvanic shock, mechanical trauma, microleakage, and toxic substances in some restorations.

A

Base

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3
Q

A material usually placed in thin layers (~0.5mm) on exposed dentine or pulp within a cavity preparation.

A

Dental liners

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4
Q

Purpose of ________:
* Formation of secondary dentine
* Pulpal medication
* Thermal protection
* Barrier to chemical irritants (which might be diffusing out of the restoration or oral fluids > That may penetrate leaky tooth restoration)

A

liners

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5
Q

3 materials used as liners?

A

1) Calcium hydroxide
2) Glass ionomer
3) Zinc oxide eugenol (ZOE)

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6
Q

A material applied in thicker layers within the cavity preparation.

A

Dental base

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7
Q

Purpose of ______:
* Provides thermal protection for the pulp
* Mechanical support for the overlying restoration (by distributing stress evenly across the underlying dentinal surface)
* Provides resistance during amalgam condensation (in areas where dentine over the pulp is thin)
* Blocks out undercuts.

A

bases

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8
Q

5 materials used for bases?

A

1) Glass ionomer
2) Zinc polycarboxylate
3) Zinc phosphate
4) Zinc oxide eugenol
5) Flowable resin

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9
Q

A strong alkali with a slightly bitter alkaline taste, produced by the reaction of calcium oxide with water.

A

Calcium hydroxide

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10
Q

Used to place the cement (calcium hydroxide) on the prepared tooth.

A

Ball tip end applicator

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11
Q

3 uses of calcium hydroxide?

A
  • Liner
  • Root canal sealer
  • Pulp-capping agent
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12
Q

Uses of _________?:
* Liner
* Root canal sealer
* Pulp-capping agent

A

Calcium hydroxide

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13
Q

3 dispensing forms of calcium hydroxide?

A
  1. Single paste form
  2. Powder form
  3. Two paste form
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14
Q
  • Light cured, stronger than 2 pastes form
  • Setting time is controllable.
A

Single paste form

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15
Q

Mix with distilled water to form a paste mixture.

A

Powder form

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16
Q
  • Mix it like ZOE.
  • Suspended in a chloroform solution of a resinous material and they have a common solvent, the aqueous methyl cellulose, a volatile substance.
  • Has a very short setting time less than 30 seconds; dries up fast.
A

Two paste form

17
Q
  • Has antimicrobial property.
  • Has a basic pH (11), acting as an irritant, leading to formation of reparative dentin.
A

Calcium hydroxide

18
Q

A powder-liquid product where the powder is a silicate glass that contains calcium, aluminum, and fluoride.

A

Glass-ionomer cement (GIC)

19
Q

The liquid in GIC?

A

polyacrylic acid

20
Q

2 dispensing forms of GIC?

A

Powder
Liquid

21
Q

Anticariogenic and makes cement translucent.

A

Fluoro - Aluminosilicate Glass

22
Q

Are adhesive tooth colored anticariogenic restorative materials.

A

Glass-ionomer cement (GIC)

23
Q

— Has an ability to bond to tooth structure.
— Causes reduction in recurrent caries due to the release of fluoride.
— Reduction in the problems associated with microleakage. This has been attributed to its antimicrobial properties.

A

Glass-ionomer cement (GIC)

24
Q

These materials should not be used as direct pulp-capping agents, since they will cause a persistent inflammatory pulpal response.

A

Glass-ionomer cement (GIC)

25
Q

Powder or liquid?

Fluoro - Aluminosilicate Glass

A

Powder

26
Q

Powder or liquid?

Tartaric Acid

A

Liquid

27
Q

Powder or liquid?

Itaconic Acid

A

Liquid

28
Q

Powder or liquid?

Water with Citric/Maleic Acid

A

Liquid

29
Q

Aqueous solution of polyacrylic acid and copolymer-chemical bonding.

A

Liquid form (GIC)

30
Q

Improves the handling characteristic by increasing the working time and shortening the setting time.

A

Tartaric Acid

31
Q

Decreases the viscosity and reduces the setting time.

A

Itaconic Acid

32
Q

Removes smear layer for better adhesion.

A

Water with Citric/Maleic Acid

33
Q

GIC:
- The ______ is dispensed later to prevent increased viscosity by water loss on exposure to the environment.
- The first increment is added to the liquid and mixed using a ____ motion for ___ seconds within a limited area on the mixing pad.
- The second increment is added to adjust the __________.
- The resultant mixture should have a ______ surface.

A
  • liquid
  • folding; 15 seconds
  • consistency
  • glossy
34
Q

The powder of is divided into how many equal increments?

A

Two (2)

Resto 2 (13 decks)

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