Course Review- L4

Question 1

List the indications for glass ionomers-

Answer 1

1. non-carious cervical lesions & root caries
2. base to replace dentin
3. block out undercut or void
4. primary dentition (small class 1 or 2s)
5. permanent dentition- open or closed sandwich technique
6. liner under resin restoration
7. sealants

Question 2

List the advantages of glass ionomers:

Answer 2

1. minimal cavity preparations (sealants)
2. adhesion to enamel & dentin
3. fluoride release, recharging, possible caries inhibition
4. minimal shrinkage
5. excellent marginal seal
6. low solubility
7. acceptable esthetics
8. excellent tissue compatibility

Question 3

List the disadvantages of glass I monomers:

Answer 3

1. low resistance to wear compared to amalgam or resin
2. lower bond strengths compared to resin
3. shades sometimes not ideal to highly esthetic areas

Question 4

What are the advantages to placing glass ionomers using the SANDWICH TECHNIQUE?

Answer 4

1. minimizes gap formation at the margin due to shrinkage of the composite resin
2. less technique sensitive than composite resin
3. fluoride release provides anti-cariogenic environment
4. useful for class II & class V restorations
5. Indicated when any part of the gingival margin of the class II or Class V preparation has been extended past the CEJ an don longer has a Cavo-surface on enamel

Question 5

A restorative procedure where a layer of glass ionomer cement is placed as a base within a cavity preparation, followed by a layer of composite resin on the top:

Answer 5

glass ionomer sandwich technique

Question 6

T/F: Glass ionomers have a fluoride release component

Answer 6

true