sealants Flashcards
sealants
organic polymer (resin) that flows into the pits and fissure and bonds to the enamel mainly by mechanical retention
patients who would find sealants helpful
high risk caries or incipient caries
xerostomia patients
ortho patients
when can you not place a sealant
when a large cavity is in the pits and fissures
ideal teeth for placing sealants
- newly erupted
- occlusal contour
caries history - other restos
on both perm and prim teeth
contradictions of sealants
radiographic evidence of interproximal dental caries
pits and fissures are well coalesced (not too deep)
allergy to material
criteria for sealant materials
- can be prolonged vines to enamel
- free flowing, low viscosity
- biocompatible with oral tissues
- simple application
- low solubility
3 types of sealants
filled
unfilled
fluoride releasing filled
what is the difference between filled and unfilled
filled has stuff added to prevent from wearing down, unfilled does not
how are sealants are identified how
by its method of polymerization and by colour
what are the majority of sealants in a clinic made of
Bis-GMA (bisphenol A-glycidyl methylate)
fillers of filled content
glass and quartz
fluoride releasing sealant material purpose
enhance caries resistance by enhancing remineralization of incipient caries at base of pit or fissure
self cured
cured by a chemical reaction
light cured
cured by a curing light
colours of sealants
clear
tinted
opaque
purpose of sealants
- to seal off pits and fissures
- to prevent bacteria from collecting in the deep areas
- to fill pits and fissure as deep as possible
how should sealant material be stored
cool, dry, dark area
purpose of acid etch
to produce irregularities or micropores in the enamel
to allow resin to penetrate and to bind in mechanical locking
how is retention of sealants obtained
acid etching
when would you use a dry angle for isolation
maxillary because of salivary glands
when would you have to use acid etch twice
if you use a polishing device that uses sodium bicarbonate
how long should etch stay on the tooth
15-30 seconds
kinds of isolation that can be used during sealant procedures
cotton roll
dry angles
dental dam
what polishing tip and paste is used for sealants
pumice paste and bristle brush tip
how long can retention of sealants stay for
years ideally 5 years
retention factors during placement of sealants depend on
precision technique
exclusion if moisture contamination
why would a sealant procedure fail
miss a step during the procedure or failure to keep the tooth dry
