Exam 3: Dental Provisional Materials Flashcards

1
Q

3 main applications of provisional materials

A
  • direct restorations
  • crowns/bridges
  • luting agents
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2
Q

calcium-hydroxide is ____

A

too weak

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3
Q

___ is never used as base material, as a luting agent, or as a temporary filling material

A

Dycal

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4
Q

materials that have been traditionally been used for temporary materials

A

zinc-oxide eugenol, non-eugenol cements

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5
Q

eugenol is a scavenger of ____; thus, eugenol-based
cements can ________ of the resin based cements resulting
in a ___ set material.

A

free radicals, compromise the polymerization, weak

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6
Q

Zinc-oxide non-eugenol is used when the provisional material will be used ________

A

in contact with other

resin-based dental materials

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7
Q

A variation of zinc oxide non-eugenol cement incorporates _______ to
reinforce the material

A

calcium sulfate (Cavit, 3M)

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8
Q

temporary crowns/bridges reasons of use: protection from

A

– thermal changes
– marginal breakage
– caries
– pulpal irritation

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9
Q

temporary crowns/bridges reasons of use: provision of

A
– pulp sedation
– tooth stability
– comfort
– function
– esthetics
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10
Q

B of BICMEP for temporary crowns/bridges

A

no excessive exothermic heat from setting, good thermal conductor

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11
Q

I of BICMEP for temporary crowns/bridges

A

capable of being easily bonded in place

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12
Q

C of BICMEP for temporary crowns/bridges

A

reasonably durable, inert to eugenol

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13
Q

M of BICMEP for temporary crowns/bridges

A

bulk = strength, rigidity

surface of material = hardness/abrasion resistance

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14
Q

E of BICMEP for temporary crowns/bridges

A

color, translucency, no staining

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15
Q

P of BICMEP for temporary crowns/bridges

A

easy to fabricate/repair, minimal dimensional changes on setting

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16
Q

3 main material types temporary crowns/bridges

A
  • acrylic resins
  • higher methacrylate resins
  • filled dimethacrylates
17
Q

_____ are almost the same as dental restorative

composites used for permanent direct restorations but with smaller amounts of fillers

A

filled dimethacrylates

18
Q
Filled dimethacrylates (FD) are more \_\_\_\_\_\_\_ as acrylic resins
(AC) and higher methacrylate (HM)
A

biocompatible as they are not as irritant

19
Q

___ types of materials are normally bonded to tooth structures using zinc oxide eugenol or noneugenol cements.

A

all

20
Q

FD is ___ than AC and HM, but the flexural strength (combination of strength and
toughness) is higher for ____ than for ____

A

harder, HM, FD and AC

21
Q

Zinc-oxide eugenol and zinc-oxide non-eugenol are the usual choice for _______

A

provisional

luting agents

22
Q

why are zinc-oxide eugenol and zinc-oxide non-eugenol are the usual choice?

A

they have limited durability because of hydrolytic degradation