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Flashcards in Provisional Acrylic Materials Deck (19):
1

What is the polymer material?

Polymethyl methacrylate

(many monomers joined to make polymer)

2

This means 1 part
This means 2 parts
This means 3 different parts

Monomer
Copolymer
Terpolymer

3

What effect does molecular weight have on polymerization?

Higher molecular weight means more polymerization

4

This property of materials can affect flow properties and water sorption

What are the 3 types?

Spatial Structure

Linear
Branched
Crosslinked

5

Which polymers (spatial structures) present better flow at high temps and absorb less water?

Crosslinked

6

This component of acylic materials contains:

Polymer beads
Initiator
Pigments
Dyes
Opacifiers
Plasticizer
Inorganic Particles

Powder

7

This component of acrylic materials contains:

Monomer
Inhibitor
Accelerator
Plasticizer
Cross linking Agents

Liquid

8

How can monomer methyl methacrylate be polymerized to polymer polymethyl acrylate

Light
Chemicals

9

In the reaction, what percent of the mixture is liquid monomer?

Polymer powder?

After polymerization you get acrylic product (polymerization is done on tooth after shaped)

25 %

75%

This combo minimizes residual monomers and expedites polymerizationY

10

Is there significant differences between light and chemical curing?

Nope, just residual monomer amounts slightly differ (chemical can have more)

11

What occurs with the material during polymerization?

Shrinkage

12

You don't want provisionals to fully set in place, during what phase do you insert it a couple times to prevent this?

Rubbery

13

methyl methacrylates (PMMA), ethyl methacrylates (PEMA), and vinyl ethylcrylates are what type of resin?

Resin composite is what type?

Acrylic

Bis-Acryl

14

What to methyl methacrylates do during polymerization that can increase pulp irritation?

They have high ____

Good ___ and ____ and _____+

Generate heat

Shrinkage

Color shades, stability, and wear resistance

15

Do ethyl methacrylates generate less or more heat than methyl methacrylates?

How do they compare with shrinkage?

Ease of use?

What is methyl methacrylates good for? Why is it bad?

Less heat from ethyl methacrylates

Less shrinkage from ethyl methacrylates

ethyl are easier to use, less damage to tissue

Color stability. High shrinkage.

16

This type of acrylic is a catalyst + base

High or low strength?

Non-brittle or brittle?

Heat/shrinkage?

Which stage does it not have?

It's expensive.

Bis-acryl

High

Brittle

Low heat and shrinkage

Putty

17

Resin composite and acrylic are good for single unit restorations, but which is good for bridges?

Which is cheaper?

They have equivalent esthetics

Which is easier to reline?

Which lasts longer?

Provisional Acrylic

Provisional Composite ( bis acrylic) is more expensive, provisional acryl is more cheaper

Provisional acrylic

Provisional acrylic

18

Which has greater shrinkage, provisional composite (bis acryl) or provisional acrylic?

What has more color stability?

Which is has greater compressive strength?

Provisional Acrylic has more shrinkage.

Provisional Acrylic has better color stability

Composite (bis acryl)

19

What does the polymerized PMMA rarely cause that the monomer causes more often?

What alternative is good for people who are sensitive to it?

Allergic reaction

Residual monomer is associated with allergic reactions

Light cured acrylic and bis acryls