Course Review - L4

Question 1

List the indications for glass ionomers:

Answer 1

1. non-carious cervical lesions and root caries
2. based to replace dentin
3. block out undercut or void
4. primary dentition- small class I or class II
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 and 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 ionomers:

Answer 3

1. lower resistance to wear compared to amalgam or resin
2. lower bond strengths compared to resin
3. shades sometimes not ideal for 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 and class V resotarations
5. indicated when any part of the gingival margin of the class II or class IV preparation has been extended past the CEJ and no 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