GIC

Question 1

does GIC release fluoride?

Answer 1

yes

Question 2

does GIC bond to tooth?

Answer 2

yes

Question 3

what are the 2 components of GIC?

Answer 3

acid (liquid)

base (glass powder)

Question 4

during GIC setting reaction, glass and acid are reacted to give what 2 substances?

Answer 4

salt and silica gel

Question 5

name the 3 phases of GIC setting reaction?

Answer 5

dissolution
gelation
hardening

Question 6

GIC must be protected after placement, what materials can be used as protection?

Answer 6

varnishes
resins (bonding agents)
greases/gels (vaseline)

Question 7

describe the bonding mechanism of GIC?

Answer 7

chelation between carboxyl groups in cement and calcium on tooth surface

Question 8

give some poor qualities of GIC?

Answer 8

poor tensile strength
lower compressive strength than composite 
poorer wear resistance than composite
lower hardness than composite
higher solubility than composite

Question 9

list some good qualities of GIC?

Answer 9

good thermal properties
no setting contraction
less susceptible to staining than composite once set
fluoride release
lower elastic modulus

Question 10

how does GIC release fluoride?

Answer 10

absorbs fluoride during brushing then releases fluoride once ambient conc falls

Question 11

list some uses of GIC?

Answer 11

dressing
fissure sealant
temporary filling
luting
orthodontic cement
restorations
base/lining

Question 12

the addition of resin to GIC improves which qualities?

Answer 12

light curing
improved physical properties
better aesthetic