Glass Ionomer Materials

Question 1

What are 4 advantages of using a GI?

Answer 1

1. Inherent (chemical) adhesion to tooth structure
2. Fl release
3. CTE similar to tooth
4. Biocompatible

Question 2

What are the 2 ways a resin modified glass ionomer (RMGI) sets up?

Answer 2

1. Acid-base reaction

2. Light and/or chemical cure

Question 3

What are the 3 phases that a GI goes through during a setting reaction?

Answer 3

1. Ion-Leaching Phase
2. Hydrogel
3. Polysalt-gel Phase

Question 4

T/F During the Ion-leaching phase in the setting reaction of a GI, physical properties are NOT affected by depletion of Fluoride

Answer 4

True

Question 5

Traditional GI acid base reaction during the setting reaction proceeds (fast or slow?)

Answer 5

Proceeds more slowly

Question 6

How is Fluoride released from the GI particles?

Answer 6

Slow long term release

Question 7

During Fluoride release, is there a loss of physical properties of the GI?

Answer 7

No loss in physical properties

Question 8

How long does the initial burst of Fluoride last after placing the GI?

Answer 8

High early Fl release that lasts for 1-2 days

Question 9

What do the Fluoride reservoirs do?

Answer 9

Involved with uptake and re-release of Fluoride

Seen in topical fluorides

Question 10

What is the biggest concern when using a RMGI luting cement to seat an all-ceramic crown?

Answer 10

The all ceramic restoration is non reinforced and since the RMGI expands, may cause the crown to fracture.