Pit & Fissure Sealants

Question 1

where majority of caries occurs

Answer 1

pits and fissures of 1st permanent molars

Question 2

purpose of using pumice before placing sealants

Answer 2

• avoid moisture for longer
• better retention of sealants

Question 3

steps for PFS

Answer 3

1. cleaning
2. isolation
3. etching
4. washing
5. application of sealant
6. check for occlusal interference
7. re-evaluation

Question 4

most ideal isolation method for PFS

Answer 4

rubber dam isolation

Question 5

purpose of etching

Answer 5

• permits low viscosity resin to be applied that penetrates the roughened surface
• produces mechanical lock of resin tags when cured

Question 6

used for etching tooth

Answer 6

37% phosphoric acid

Question 7

how long tooth should be etched

Answer 7

20 seconds

Question 8

how long tooth should be re-etched when contaminated

Answer 8

15 seconds

Question 9

how long tooth should be washed after etching

Answer 9

20-40 seconds

Question 10

ideal appearance after washing of etchant

Answer 10

frosty white appearance

Question 11

avoided when careful application of sealant is done

Answer 11

incorporation of air bubbles

Question 12

technique for applying sealant

Answer 12

• apply only at the central grooves
• use microbrush to spread out the sealant

Question 13

used to remove any presence of bubbles in sealant

Answer 13

microbrush or probe

Question 14

indication of presence of bubbles

Answer 14

high # of microorganisms

Question 15

used to check for occlusal interference

Answer 15

articulating paper

Question 16

observation of sealed teeth to determine the effectiveness of the sealant

Answer 16

re-evaluation

Question 17

% of sealants that should be repeated yearly

Answer 17

5-10%

Question 18

types of sealant

Answer 18

1. resin
2. GIC

Question 19

2 types of resin sealant

Answer 19

1. filled
2. unfilled

Question 20

filled resin: characteristics

Answer 20

• high water resistance
• low penetration

Question 21

resin type:
- low viscosity
- greater penetration
- better retention
- more prone to bubbles

Answer 21

unfilled

Question 22

unfilled resin: types

Answer 22

• translucent
• opaque

Question 23

advantage of using opaque resin vs translucent

Answer 23

detect dislodgement

Question 24

GIC: characteristics

Answer 24

• continuous fluoride release
• moisture friendly

Question 25

types of GIC

Answer 25

1. low viscosity
2. high viscosity
3. resin-modified GIC

Question 26

GIC: low viscosity

Answer 26

Fuji III to Fuji VII

Question 27

GIC: high viscosity

Answer 27

HVGIC, ketac

Question 28

GIC: resin-modified GIC

Answer 28

• acid based; photoactivation
• improved physical characteristics
• less sensitivity to water
• longer working time