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Dental Materials > Dental Cements > Flashcards

Dental Cements Flashcards

1
Q

What is a luting agent or lute?

A

To glue two different structures together
- to hold appliances and restorations together with micromechanical and macromechanical retention

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2
Q

What are the demands of a luting agent?

A
  • Must set in the mouth
  • Must set in a matter of minutes
  • Must be biocompatible
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3
Q

What affects luted restorations?

A

oral hygiene and diet can also affect longevity- more soluble in acidic environment

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4
Q

Dental cements used as interediate base or liner must have what

A

when remaining dentin is believed to be less than 2mm thick.

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5
Q

Liner is used has?

A

used to protect pulp from chemical irritation
does not provide thermal insulation
can stimulate secondary dentin formation and or release fluoride

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6
Q

A base can ?

A

Can be used in conjunction with a liner when the base can be irritaing to the pulp
provides thermal insulation

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7
Q

When are dental cements used?

A

used in both restorative and orthodontic procedures

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8
Q

What are the primary functions of a dental cement?

A

Fill gaps between devices and tooth surfaces
secure crowns, bridges and ortho stuff

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9
Q

What are the composition of dental cements?

A

Powder: basic metal oxide of silicate
Liquid: acidic water-soluble polymer

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10
Q

What are the essential functions of dental cements?

A

luting agent
pulp protection
temporary restorations
orthodontic attachments
aesthetic applications

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11
Q

What are some water based cements?

A
  • Zinc phosphate cement: traditional used- exothermic setting
  • Glass ionomer cement : Notable for fluoride release and chemical bond
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12
Q

What are the properies of zinc phosphate cement ?

A
  • mixing heat: exothermic
  • viscosity
  • setting time
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13
Q

What are some advantages of the zinc phosphate cement?

A
  • Strength
  • Rigidity
  • Cost-effectiveness
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14
Q

What are some disadvantages?

A
  • Lack of adhesion
  • Acidity
  • Aesthetic limitations
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15
Q

Clinically how is zinc phosphate used?

A
  • Luting agent
  • dental bases
  • temporary restorations
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16
Q

What are the properties of glass ionomer cement?

A

Fluoride release
chemical adhesion
biocompatibility

17
Q

What are some advantages of glass ionomer cement?

A
  • fluoride release
  • aesthetics
  • moisture tolerance
18
Q

What are some disadvantages of glass ionomer cement?

A
  • lower tensile strength
  • less resistant to abrasion
  • sensitivity to dehydration and hydration
19
Q

Clinically how can glass ionomer be used?

A

As a base or liner
sealants and preventice resin restorations
core build-ups
used for filling in non-load bearings primary teeth and root caries (class V)

20
Q

resin-based cement properties are?

A
  • Composed of composite
  • can be self-curing, dual-curing or light curing
  • strong chemical bond
  • superior color matching
21
Q

What are the advantages of a resin-based cement?

A

strong bond
shade matching
minimal microleakage

22
Q

Clinically how are resin based cements used?

A
  • cementing porcelain, ceramic and composite inlays, onays, crowns and veneers
  • Fiber posts
  • Ortho brackets
23
Q

What are some considerations for resing-based cements?

A

technique sensitivity
moisture sensitivity

24
Q

What are polycarboxylate cement?

A

Moderate adhesive strength and biocompatibility.

25
Q

what can polycarboxylate cement be used for?

A

luting
base
ortho
tem restorations
fixing stainless steel crowns

26
Q

What are some advantages of polycarboxylate cement?

A
  • Biocompatibility- well-tolerated by dental tissues, causing only mild irritation
  • ease of use- chips easly
  • versatility
27
Q

Cement Selection Criteria are?

A
  • biocompatibility
  • Aesthetic requirements
  • mechanical properties
  • retention
  • moisture control
  • easy of use and clean up
  • solubility abd disintergration
  • thermal and chemical properties

Dental Materials (23 decks)

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