9/19: Lecture 5 - Sealants Flashcards
What is the purpose of sealants?
To seal the surfaces with dental material to prevent and arrest caries in permanent molars
Where are sealants placed?
In anatomical grooves of teeth
When do you place sealants?
Soon after eruption
Where do you place sealants?
ONLY in pit and fissure areas
ONLY in non-cavitated teeth (sound enamel)
Are sealants temporary or permanent?
Temporary
What teeth are PRRs placed in?
INITIAL caries (E1 and E2 -> white spot lesions)
Where CANT PRRs extend to?
Dentin
Is PRR permanent or temporary?
Permanent
What must you do prior to placing PRR?
Remove caries
What material is used for PRR?
Bonding agent and flowable resin composite
What is a resin-based sealant made of?
UDMA or Bis-GMA monomers
How are resin based sealants polymerized?
By chemical or light activator
What sealants are most common?
Resin based
What are the pros of resin based sealants?
good retention, controlled working time, wear-resistant
What are the cons of resin-based sealants?
moisture-sensitive, need to clean/etch tooth surface prior
What is glass ionomer made of?
cement with acid-base rxn between fluoroaluminosilicate glass powder and polyacrylic acid solution
What properties does glass ionomer have?
has fluoride releasing-properties
What are the pros of glass ionomer?
moisture friendly, no need to pretreat teeth (chemical bond), releases fluoride
What are the cons of glass ionomer?
poor retention, cannot control working time (chemical rxn)
What are polyacid-modified resins made of?
resin-based material with fluoride release and adhesive property of glass ionomer
What are the pros of polyacid-modified resin?
release of fluoride and controlled working time
What are the cons of polyacid-modified resin?
lower amount of fluoride release, lower retention than resin, moisture sensitive, and requires etch prior
What is resin-modified glass ionomer made of?
glass ionomer sealants with resin component
What are the pros of resin modified glass ionomer?
similar fluoride release as GI, longer working time, less water sensitive, no etch required
What are the cons of resin modified glass ionomer?
lower retention than resin, lower wear-resistance than resin
How do you place sealants?
- Dry environment
- Clean pits and fissure with pumice and prophy brush (NO prophy paste because interfere with etching process), air abrasion, hydrogen peroxide or enameloplasty
- Place acid etch for 15 seconds, rinse, and dry (only for resin-based)
- Place material
- Light cure (resin-based)
- Check occlusion
How do you place preventative resin restorations?
- Remove caries, no numbing necessary because in enamel
- Etch for 15-20 seconds, rinse, and dry
- Place bond agent, air dry, light cure
- Place flowable resin composite
- Light cure
- Check occlusion
What are the 3 caries prevention and risk management strategies?
- Behavioral modifications
- Topical fluoride application
- Pit and fissure sealants
What are examples of behavioral modifications?
food/drink, hygiene habits, chewing gum with xylitol
What are examples of topical fluoride applications?
fluoride varnish, silver diamine fluoride
What are non-surgical caries management examples?
- Sealants
- PRR
Who can sealants be placed by?
dentist, hygienist, and assistants
What do you need to have for sealants?
Isolation
Who can PRRs be placed by?
Only dentist because have to remove caries first
