Interim fixed resotrations Flashcards Preview

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Flashcards in Interim fixed resotrations Deck (15)
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1
Q

What are three acrylic materials?

A
  • Poly-methyl methacrylate (PMMA)
  • Poly-ethyl methacrylate (PEMA)
  • Poly-isobutyl methacrylate (PIMA)
2
Q

Acrylics are powder/liquid systems: What is the powder for and what is the liquid for?

A
  • Powder = Polymer

- Liquid = monomer

3
Q

What is Bis-Acryl?

A

-Bis-GMA resin and Acrylic

4
Q

What type of cure is used for Bis-Acryl?

A

-Dual cure

5
Q

What are the most significant deficiencies are what for a provisonal?

A
  • Exothermic
  • Polymerization shrinkage
  • Color degradation over time
6
Q

What material exhibits the greatest polymerization shrinkage?

A

-PMMA

7
Q

What material exhibits the highest exotherm?

A

-PMMA

8
Q

What are the softest temporary materials?

A
  • PEMA

- PIMA

9
Q

What temporary materials exhibit the least polymerization shrinkage?

A
  • Microfilled Bis-GMA

- Urethane DMA

10
Q

What temporary material is the most brittle and difficult to repair?

A

-Microfilled-Bis GMA (Bis-acryl)

11
Q

What is an indication for Unifast (light cured PMMA)?

A

-Routine use in single and small multiple unit situations

12
Q

What is Urethane DMA good for?

A

-All-ceramic provisionals

13
Q

What is a caution to take when making using the direct technique?

A

-Not to lock polymerized material into proximal undercuts

14
Q

In an indirect technique where do you allow the material to polymerize?

A

-Under pressure in warm water

15
Q

What is the most common temporary cements?

A

-Zinc Oxide and Eugenol