Exp Func Ch 59 Sealants Flashcards
Resin material applied to the pits and fissures of teeth
Dental sealants
The process of changing a simple chemical into another substance that contains the same elements
Polymerization
A technique used to open fissures before sealant is placed
Microabrasion
A sealant material that does not contain filler particles
Unfilled resin
A salt or ester or acrylic acid
Acrylate
Sealant firmly adheres to the tooth surface because of…
Sealant retention
Why is clear sealant material less desirable
More difficult to evaluate
What is the difference between filled and unfilled sealants with regard to retention rates
No difference
What is the range of shelf life of sealant materials
18-36 months
What are sealants and what do they provide
“Plastic coverings” provides mechanical barrier against cariogenic bacteria
Caries risk factors
Accumulation of plaque, cariogenic diet, history of caries, low fluoride intake, pit and fissure anatomy
Do teeth need to be fully erupted before placing sealants
No
Can you do sealants if there are caries present interproximally
No
What does frank mean
Suspicious
What type of sealant material release fluoride and is moisture tolerant
Glass ionomer
What are glass ionomer sealants a good choice for
Partially erupted, difficult to isolate transitional sealant
What do resin based sealants provide
Higher bond strengths and longer retention
Self etch technique
Clean teeth, no cleaning medium containing fluoride or oils (affects adhesion), rinse, isolate, dry, activate L-pop
How to apply L-Pop
Churning or spinning motion to applicator for 5 seconds to mix adhesive
What color should the applicator on the L-Pop be when properly activated
Light yellow tint. If not unfold and reactivate. Clear indicates improper activation
How long do you scrub adhesive onto surface to be sealed
15 seconds
How far in advance can the l-pop be activated
10 minutes
What is the highest risk period for decay after a tooth erupts
Within 3 yrs of eruption
Sealant material shouldn’t be stored near
In proximity to eugenol-containing products
Etchant contains what chemical
Phosphoric acid
Self cured sealants are supplied with two parts…
Base and catalyst
Why are sealants contraindicated on teeth with proximal decay
Sealant would break off because if filling placed to restore after sealant placed
What percent of low income children are sealants used
30
What is the most important factor in the success of a sealant
Proper placement/retention
What teeth are candidates for sealants
Teeth with deep pits and fissures preferably recently erupted teeth
What does carries risk assessment involve
Premolars/molar deep grooves of some others permanent, primary molars
Can you place a sealant over incipient lesions
Yes
What is the advantage of a tinted sealant over clear/colorless sealant
Easier to diagnose, easy to see during application and checking for retention
What is the difference between filled and unfilled sealants
Filler more wear resistant, unfilled, unfilled does not require occlusal adjustment because natural wear is sufficient filled does with possible adjustment
What technique error most commonly leads to sealant failure
Poor isolation
What item could be used in interproximal spaces to prevent the etchant from contacting adjacent teeth during the etchant procedure
Mylar matrix strips or metal matrix band
What technique can be used to clean the teeth other than using prophy paste
Air polish
What situations indicate the sealant may need to be replaced or adjusted
Too high, sealant comes off when retention checked, blocks contact area, holes
What is the benefit of a fluoride releasing sealant
Makes pit or fissure more resistant to decay if sealant lost, fluoride released from sealant creates layer at base of sealed groove to re-mineralize incipient
Pit and fissure sealants are especially useful through the carries active period Which is
6-15 years
What happens to the enamel if it is etched but not sealed
Will re-mineralize after 24 hour exposure to calcium phosphate salts in saliva
If the tooth becomes contaminated with moisture, after it is etched, what should you do
Reapply etch for five seconds and rinse again
How would you describe a pit? A fissure?
Pit=deep pocket fissure= groove
According to studies, with proper maintenance and recall appointment, what is the success rate of sealants after a decade or more
80%
Most sealant failures occur within the first
3 to 6 months
What kind of barrier do sealants provide
Mechanical barrier against cariogenic bacteria
After a sealant has been placed and before it is cured, what should you do
Illuminate bubbles with explore and used to spread the sealant
What happens to the tooth if the sealant is partially lost
Microleakage occurs and decay under the sealant
Unfilled sealants that are high after they are cured, will wear down and do not need to be adjusted
True
If a child has a tooth that hasn’t erupted yet what material would be used to place a sealant
You can’t
What kind of sealant material would be used for a transitional sealant
Glass ionomer
Is there a difference between resin base sealants and glass ionomer sealants
Resin base provides hire bond strength and longer retention, glass ionomer moisture tolerant releases fluoride
What kind of damage can a light cure cause
Retinal
