sealants

Question 1

sealants

Answer 1

organic polymer (resin) that flows into the pits and fissure and bonds to the enamel mainly by mechanical retention

Question 2

patients who would find sealants helpful

Answer 2

high risk caries or incipient caries
xerostomia patients
ortho patients

Question 3

when can you not place a sealant

Answer 3

when a large cavity is in the pits and fissures

Question 4

ideal teeth for placing sealants

Answer 4

• newly erupted
• occlusal contour
  caries history - other restos
  on both perm and prim teeth

Question 5

contradictions of sealants

Answer 5

radiographic evidence of interproximal dental caries

pits and fissures are well coalesced (not too deep)

allergy to material

Question 6

criteria for sealant materials

Answer 6

• can be prolonged vines to enamel
• free flowing, low viscosity
• biocompatible with oral tissues
• simple application
• low solubility

Question 7

3 types of sealants

Answer 7

filled
unfilled
fluoride releasing filled

Question 8

what is the difference between filled and unfilled

Answer 8

filled has stuff added to prevent from wearing down, unfilled does not

Question 9

how are sealants are identified how

Answer 9

by its method of polymerization and by colour

Question 10

what are the majority of sealants in a clinic made of

Answer 10

Bis-GMA (bisphenol A-glycidyl methylate)

Question 11

fillers of filled content

Answer 11

glass and quartz

Question 12

fluoride releasing sealant material purpose

Answer 12

enhance caries resistance by enhancing remineralization of incipient caries at base of pit or fissure

Question 13

self cured

Answer 13

cured by a chemical reaction

Question 14

light cured

Answer 14

cured by a curing light

Question 15

colours of sealants

Answer 15

clear
tinted
opaque

Question 16

purpose of sealants

Answer 16

• to seal off pits and fissures
• to prevent bacteria from collecting in the deep areas
• to fill pits and fissure as deep as possible

Question 17

how should sealant material be stored

Answer 17

cool, dry, dark area

Question 18

purpose of acid etch

Answer 18

to produce irregularities or micropores in the enamel

to allow resin to penetrate and to bind in mechanical locking

Question 19

how is retention of sealants obtained

Answer 19

acid etching

Question 20

when would you use a dry angle for isolation

Answer 20

maxillary because of salivary glands

Question 21

when would you have to use acid etch twice

Answer 21

if you use a polishing device that uses sodium bicarbonate

Question 22

how long should etch stay on the tooth

Answer 22

15-30 seconds

Question 23

kinds of isolation that can be used during sealant procedures

Answer 23

cotton roll
dry angles
dental dam

Question 24

what polishing tip and paste is used for sealants

Answer 24

pumice paste and bristle brush tip

Question 25

how long can retention of sealants stay for

Answer 25

years ideally 5 years

Question 26

retention factors during placement of sealants depend on

Answer 26

precision technique
exclusion if moisture contamination

Question 27

why would a sealant procedure fail

Answer 27

miss a step during the procedure or failure to keep the tooth dry