Module 6 Flashcards
what is the ideal isolation method for placing a fissure sealant
- rubber dam
- it is the ‘gold standard’
what are alternative methods for isolating the tooth other than rubber dam
- cotton wool rolls
- saliva ejector
- parotid shield
how is the tooth cleaned
- clean occlusal surface with pumice and water slurry = slow speed, rubber cup, brush
- rinse with 3-in-1 water spray
what etch is used for fissure sealants
- 35% ortho-phophoric acid on occlusal surface
how long is etch left on for
- 20 seconds
how is the etch removed -
- wash off with 3-in-1 water spray
- dry tooth with 3-in-1 air spray
what should the tooth surface look like after being etched
- frosted
- chalky white appearance
what is the sealant applied with
- micro-brush
- brush
- probe
- small excavator
what is the usual time for light curing the sealant
- 40 seconds
- but go off manufactures instructions
what do you check sealant for after
- air bubbles
- excess sealant
- if it can be dislodged
what od you do if there are air bubbles in the sealant
- remove part of sealant and replace
what is the term for extra sealant and how do you remove it
- ‘flash’
- common at distal interproximal
- remove with a probe of dental floss
how do you determine if the sealant can be picked off or not
- try to dislodge with a probe
- pick at the edges
- if it dislodges, repeat the procedure
how often should sealants be reviewed
- every 6 months
how often should a high risk child be reviewed radiographically
- every 6 months
how often should a moderate risk child be reviewed radiographically
- every 12 months
how often should a low risk child be reviewed radiographically
- every 24 months
when should fissure sealants be placed
- on permanent molars as early as possible after eruption
- as soon as you can gain appropriate moisture control
what are the two types of sealants
- resin based sealants
- glass ionomer sealants
which type of sealant has better retention
- resin
what is the standard prevention advice for fissure sealants for all children
- place in all pits ad fissures of permanent molars as soon as possible
- ensure buccal pits of lower first molars and palatal fissures of upper first molars
- check sealants at every recall visit for wear and tear
- top-up damaged sealant
when would you use GI sealants
- on fully erupted teeth where child is uncooperative and ensure flouride varnish application is optimal
what is the standard prevention advice for fissure sealants for high risk children
- provide standard prevention
- consider using GI on partially erupted 1st and 2nd molars until tooth is fully erupted and can give resin
- fissure seal palatal pits on upper lateral incisors, occlusal and palatal surfaces of D’s and E’s and 1st and 2nd molars
what are the options for cleaning the tooth
- wipe tooth with cotton wool pledget, clean with toothbrush but no paste, using a bristle brush with a prophy paste or gently pulling a probe through he fissures to remove debris
- use of 3-in-1 alone is not good enough
how do you check the airline is free from water
- blow air onto the mirror surface to reveal any water contamination
how far up the cusp of the tooth should be sealed with resin
- a third of the incline of the cusp
why must you not let resin to overflow into gingival sulcus
- could compromise the seal
why must you wipe the air-inhibited layer from the surface of the sealant
- children find the taste distressing
how can you tell if a clear sealant is leaking
- if there is opalescence visible at the sealant/tooth interface that usually indicates leakage and demineralisation
when can a resin sealant be difficult to place
- on a partially erupted tooth, or with a child who cooperation is limited
what is the main disadvantage of GI sealant
- retention rates are poor long-term
when should you consider using GI sealant
- when child is pre-coperative
- when resin sealant is indicated bu there are concerns about moisture control
- on a partially erupted tooth
what technique is used for GI sealants
- press finger technique
how are GI sealants placed
- place a small amount of GI on finger tip and petroleum jelly on the adjacent
- wipe tooth surface with a cotton wool roll
- firmly apply the finger tip with GI to tooth surface
- keep finger in place for 2 minutes
- place second finger in the mouth and rapidly switch fingers to allow coverage of GI with petroleum jelly before moisture contamination
what are fissure sealants
- plastic coating that are painted on to the grooves of the back teeth
what does fissure sealant do
- forms a protective layer that keeps food and bacteria from getting stuck in the tiny grooves in the teeth and causing decay
how long do sealants last
- usually last many years but need to be checked regularly to make sure the seal is intact
