Interim fixed resotrations

Question 1

What are three acrylic materials?

Answer 1

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

Question 2

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

Answer 2

• Powder = Polymer

- Liquid = monomer

Question 3

What is Bis-Acryl?

Answer 3

-Bis-GMA resin and Acrylic

Question 4

What type of cure is used for Bis-Acryl?

Answer 4

-Dual cure

Question 5

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

Answer 5

• Exothermic
• Polymerization shrinkage
• Color degradation over time

Question 6

What material exhibits the greatest polymerization shrinkage?

Answer 6

-PMMA

Question 7

What material exhibits the highest exotherm?

Answer 7

-PMMA

Question 8

What are the softest temporary materials?

Answer 8

• PEMA

- PIMA

Question 9

What temporary materials exhibit the least polymerization shrinkage?

Answer 9

• Microfilled Bis-GMA

- Urethane DMA

Question 10

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

Answer 10

-Microfilled-Bis GMA (Bis-acryl)

Question 11

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

Answer 11

-Routine use in single and small multiple unit situations

Question 12

What is Urethane DMA good for?

Answer 12

-All-ceramic provisionals

Question 13

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

Answer 13

-Not to lock polymerized material into proximal undercuts

Question 14

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

Answer 14

-Under pressure in warm water

Question 15

What is the most common temporary cements?

Answer 15

-Zinc Oxide and Eugenol