Adhesives and Dental Cements Flashcards
material that bonds 2 surfaces; area must be clean and dry
adhesives
seeping/leaking of bacteria between the tooth and restoration
micro leakage
heating/cooling causing expansion or contraction
percolation
roughens surface so adhesive has something to stick to (35-37% orthophosphoric acid for 15 to 30 secs)
etching
harder to bond to than enamel so usually have more steps
dentin
hold/glue to the tooth surface and protect dentin or pulp
cements
what are examples of cements
luting agents, liners, bases, restorations, perio packs, fill root canals, cement ortho appliances
what is the luting consistency
1” string
adhesion = ____________ = less caries, sensitivity, stain, damage from percolation
no microleakage
thin; secondary dentin formation, reduces dentinal sensitivity, protects pulp (chemical)
liners
what are examples of liners
calcium hydroxide or glass ionomers
thicker to replace dentin protects pulp (thermal)
bases
what are examples of bases
glass ionomers
IRM (ZOE with reinforcement material)
temporary filling
ZOE
temporary cement
COE (Zinc Oxide MINUS eugenol)
perio packs
rarely used: seals tubules under amalgams
cavity varnish
adheres to dentin, enamel, and metal; strong luting cement; good compressive strength; release fluoride
zinc polycarboxylate pros
short working time
zinc polycarboxylate cons
promotes secondary dentin formation and releases fluoride
calcium hydroxide
fluoride releasing restorative material made with silver and glass ionomer
cermet
does not release fluoride; does not chemically bond to the tooth; irritating to the pulp because it is very acidic; produces heat
zinc phosphate cons
very very strong
zinc phosphate pros
when you see “phosphate” what should you remember
etch=acidic=bad
what’s the #1 choice for cement type
glass ionomer
considered an excellent liner or base; release fluoride; bonds well to the tooth structure and to composite resins; high biocompatibility; good thermal insulators, similar thermal expansion to tooth structure; low solubility
glass ionomers pros
need very dry surface
glass ionomer cons
glass ionomer + composite
composer
what does ZOE stand for
zinc oxide eugenol
obtudent effect = sedative; antimicrobial properties
ZOE pros
only used as temp cement; does not adhere to enamel and dentin; shouldn’t be used under resin
ZOE cons
what cements are fluoride releasing
cermet, composer, glass ionomers, zinc polycarboxylate, ZOE, calcium hydroxide
what cements do not release fluoride
zinc phosphate
