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Flashcards in Test 2 Deck (21):
0

Determines the application and the retention of the appliance

Film thickness

1

Consistency of the cement

Viscosity

2

Luting agents

Cements

3

Three basic types of cements

Water based
Resin based
Oil based

4

Do not bond well, low film thickness. In general they rely on acid base setting reaction, and some release fluoride.

Water based

5

High bond strength, many use adhesives, some have monomers or use primers so that they will bond to dental alloys (metals) and ceramics

Resin based

6

Primarily used for Luting restorations, most contain eugenol, but there are some oil free cements. These are thicker and have lower mechanical properties

Oil based

7


Glass ionomer cements, zin phosphate, zinc polycarboxylate

Water based cements

8

An acid based reaction, initial set during the first 3 hours, can continue for 48 hours

Water based cements setting time

9

Bond chemically to enamel and dentin, mixing can be on a glass slab or paper pad. Working time approx 2 minutes

Water based cements

10

Resin modified glass ionmer cement

Known as "hybrid ionomers",
- both self and light cured

11

Used for permanent celebration, ceramic-metal crowns, bridges, metal inlays, onlays, can also be used for liners and bases
**material of choice; strongest and least soluble of the cements**

Resin modified glass ionomer cement

12

Zinc polyacrylate cements

- known as zinc polycarboxylate
- setting time can be extended by using a glass slab + temperature
- working time 2.5-6 minutes
- will bind directly to tooth structure
- not too strong

13

Uses of zinc polyacrylate

Metal inlays, Luting, crowns, and for bases

14

Zinc phosphate

The liquid has an acid in it which begins the setting reaction when you start mixing
*** uses an exoteric reaction
*** glass slab only because of acid

15

Mixing for zinc phosphate

Must be on a cool glass slab, no slowly, small portions at a time

16

Can be light or self cute
Have high strength and release fluoride

Copomers

17

Oil based cements

Zinc oxide eugenol
Non eugenol cements
- do not have great strength
- do have a sedative effect on dentin

18

Different types of oil based cements

Type 1- temporary cement
Type 2- permanent cement
Type 3- filling materials and bases
Type 4- cavity liners

** setting time ranges from 15 minutes to 12 hours

19

Cavity varnished (copalite)

- acts as a barrier against irritants
-reduces oral fluid into dentin
- do not bond on tooth
- many are used with zinc phosphate cement
- not used with composite Restorations

20

Uses of a cavity liner/base

To create a secondary dentin when applied to pulp exposures
- heat/cold protection