Pit & Fissure Sealants Flashcards
(28 cards)
where majority of caries occurs
pits and fissures of 1st permanent molars
purpose of using pumice before placing sealants
- avoid moisture for longer
- better retention of sealants
steps for PFS
- cleaning
- isolation
- etching
- washing
- application of sealant
- check for occlusal interference
- re-evaluation
most ideal isolation method for PFS
rubber dam isolation
purpose of etching
- permits low viscosity resin to be applied that penetrates the roughened surface
- produces mechanical lock of resin tags when cured
used for etching tooth
37% phosphoric acid
how long tooth should be etched
20 seconds
how long tooth should be re-etched when contaminated
15 seconds
how long tooth should be washed after etching
20-40 seconds
ideal appearance after washing of etchant
frosty white appearance
avoided when careful application of sealant is done
incorporation of air bubbles
technique for applying sealant
- apply only at the central grooves
- use microbrush to spread out the sealant
used to remove any presence of bubbles in sealant
microbrush or probe
indication of presence of bubbles
high # of microorganisms
used to check for occlusal interference
articulating paper
observation of sealed teeth to determine the effectiveness of the sealant
re-evaluation
% of sealants that should be repeated yearly
5-10%
types of sealant
- resin
- GIC
2 types of resin sealant
- filled
- unfilled
filled resin: characteristics
- high water resistance
- low penetration
resin type:
- low viscosity
- greater penetration
- better retention
- more prone to bubbles
unfilled
unfilled resin: types
- translucent
- opaque
advantage of using opaque resin vs translucent
detect dislodgement
GIC: characteristics
- continuous fluoride release
- moisture friendly
