Resin based restorations and fissure sealants

Question 1

List materials we use in dentistry to restore teeth

Answer 1

1. Fissure sealant
2. Dental composites
3. Polyacid modified resin
4. Glass polyalkenoate
5. Resin modified polyalkenoate

Question 2

What are fissure sealants activated by?

Answer 2

Light / chemical activation

Question 3

What is dental composite activated by?

Answer 3

Light / chemical activation

Question 4

What are glass polyalkenoate activated by?

Answer 4

Chemical activation

Question 5

What is poly acid modified resin activated by?

Answer 5

Light / chemical activation

Question 6

What is Resin modified polyalkenoate activated by?

Answer 6

Light / chemical activation

Question 7

What are glass polyalkenoates also referred to as?

Answer 7

Glass ionomers or glass ionomer cements (GICs)

Question 8

Describe GIC

Answer 8

It is a composite material

Question 9

Wha are the starting material

Answer 9

Are a polyacid and ionomer glass

Question 10

What form is ionomer glass in the used by clinician?

Answer 10

As a powder and a liquid
contemporary systems have the glass and a dried polyacrylic acid packaged as the powder with the liquid being merely water.

Question 11

What happens in a GPAC reaction?

Answer 11

1. The acid dissolved forming a viscous aqueous solution with the glass dispersed through out
2. The modified glass surface becomes a silica gel
3. Reaction continues as further ions diffuse through the gel to the surface
   4.

Question 12

When does the restoration reach its full strength?

Answer 12

Approx 1 week

Question 13

During the eek before the restoration sets completely what is the restoration vulnerable to?

Answer 13

Vulnerable to desiccation which leads to surface cracks reducing surface integrity.

Question 14

How can the vulnerability be reduced during the first week following placement of the restoration?

Answer 14

can be eased by applying a coat of varnish or more frequently petroleum jelly.