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Operative Midterm 2 > Adhesives, sealants, cements, liners, bases, and waxes > Flashcards

Adhesives, sealants, cements, liners, bases, and waxes Flashcards

1
Q

What is sealant material?

A

BisGMA-TEGDMA system but no filler

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2
Q

I sealant bonding chemical or mechanical?

A

Mostly mechanical

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3
Q

What physical feature of enamel provides the majority of retention?

A

Microtags

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4
Q

Why is the oxygen inhibition layer important to consider when dealing with sealants?

A

Oxygen interferes with radical polymerization, the surface of VLC materials are often uncured

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5
Q

Adhesive layer has what character?

A

Has both hydrophilic and hydrophobic character

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6
Q

Describe adhesive failure.

A

The adhesive fails to hold the composite to the dentin

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7
Q

Describe cohesive failure.

A

The adhesive holds to the dentin and composite but the adhesive separates from itself

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8
Q

Describe structural failure.

A

The dentin or composite fails

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9
Q

What is a smear layer?

A

Ground collagen and HA that is adhered to a surface; this interferes with bonding

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10
Q

What are the 4 traditional steps for dentin bonding?

A

Etch, prime, adhesive, and restoration

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11
Q

What is the composition of typical dentin etch?

A

30% H3PO4

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12
Q

What is the primer?

A

A hydrophobic monomer used to stabilize the dentin. (keeps collagen fibers from collapsing)

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13
Q

Glass-ionomers can be used as what?

A

Cements and bases

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14
Q

Zinc oxide eugenol (ZOE) can be used as what?

A

Cement, liner, and a base

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15
Q

Calcium hydroxide can be used as what?

A

Liner and a base

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16
Q

What are cements used for?

A

Binding restorations of appliances to tooth structure

17
Q

What are 4 water based cements?

A

Glass-ionomers, resin modified glass-ionomers, zinc phosphate, and zinc polyacrylate

18
Q

What are two resin based cements?

A

Composites and compomers

19
Q

What is an oil based cement?

A

Zinc oxide eugenol

20
Q

What is a liner?

A

A relatively thin layer of material used to protect the dentin from residual reactants that diffuse out of the restoration or oral fluids that may penetrate leaky restoration interface

21
Q

What are three kinds of liners?

A

Solution liners, suspension liners, and cement liners

22
Q

What is the thickness of a solution liner?

A

2-5 micrometers

23
Q

What is the thickness of a suspension liner?

A

20-25 micrometers

24
Q

What is the thickness of a cement liner?

A

200-1000 micrometers

25
Q

What is indirect pulp capping?

A

When a preparation is <0.5mm to the pulp calcium hydroxide liner is applied

26
Q

What is direct pulp capping?

A

When a preparation exposes pulp a dentist would place a direct pulp cap (calcium hydroxide liner)

27
Q

Calcium hydroxide liners stimulate what biologic process?

A

Reparative dentin is stimulated by this

28
Q

How does CaOH work?

A

Releases hydroxide ions (pH>11) and when ionized in low concentration odontoblast formation is stimulated

29
Q

What are three sedative restoration materials?

A

Reinforced zinc oxide eugenol, resin modified glass ionomers (RMGI), and glass ionomers (GI)

30
Q

ZOE has what that acts as obtundant (dulls pain)?

A

Oil of clove

31
Q

Why use a liners and bases?

A

To protect the pulp and minimize post-op sensitivity; acts as thermal and chemical barrier, controls inflammation of the pulp, and controls fluid movement

32
Q

What are the advantages of glass ionomer?

A

Adheres to tooth structure, fluoride release, proven clinical record or retention (better than composite), dimensionally stable, and biocompatable

33
Q

What are the disadvantages of glass ionomer?

A

Slow setting, early dissolution, optical properties, stain resistance, and poor physical properties

34
Q

What are five properties of waxes?

A

Temporary materials, should melt at lower temperatures, be carveable, burn off, and be dimensionally stable

Operative Midterm 2 (5 decks)

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