DMS Flashcards
Name 4 metallic post materials and 4 non metallic post materials
type IV gold
titanium
cobalt chromium
stainless steel
glass fibre
carbon fibre
zirconia
fibre reinforced resins
Name additives to gutta percha
zinc oxide as a filler
waxes as plasticisers
barium as a radiopacifier
What luting cements can be used for a MCC?
glass ionomer RMGI composite resin cement zinc phosphate poly carboxylate
How would you remove a post?
ultrasonic tips to disrupt the luting cement
masseran kits to make a gully around the post
rotosonic tips to disrupt the cement
What are additives in amalgam and what are they for?
Copper - reduces tarnishing and strengthens
zinc - oxygen scavenger
How can you reduce marginal leakage in amalgam restorations?
conventional cavity varnish (copalite) bonding agent (panavia)
What are some constituents of composite?
Resin - Bis-GMA
filler - quartz
activator - benzoyl peroxide
(compressive strength, abrasion resistance, thermal expansion and setting contraction, aesthetic qualities are defined by filler)
What are some different types of composites?
macrofilled - good mech, poor aesthetics
microfilled - good aesthetics, poor mechs
nanofilled - good aesthetics, good wear
hybrid - good mechs, good aesthetics
How would you finish a composite?
microfine diamond bur and under water spray to get gross anatomy and finishing
finishing strips for interdentally
aluminioum oxide coated discs (Sof-Lex)
What are different dentine bonding agent techniques?
etch/rinse
- Three step - acid etch, prime, bond all separate
- two step - acid etch, prime/bond
Self etching
- two step - acid etch, bond
- one step - acid etch/primer/bond - good for kids
how would you bond to a metal indirect restoration?
sandblast metal surface (micromechanical retention), 4-META conditioner, composite luting agent
How woul dyou bond to a ceramic indirect restoration?
etch, silanate, and luting agent
What are uses of glass ionomers?
- luting cements (crowns/bridges/ortho bands)
- restorative cements
- liners under restorations
- light cure/dual cure
What is the setting reaction of GI?
base + polyacid –> poly salt + water
What aesthetic restorative materials are there?
composite
GI
RMGI
compomer (F-release of GI, wear resistance of comp)
giomers - comp resin, active GI particles
ceromers - indirect comp resin. high filler content
What cement would you use for a temporary restoration?
ZOE/resin bonded ZOE, GI (seals prep margins)
What cement would you use as a luting agent?
zinc phosphate
GI
polycarboxylate
composite based luting systems
What cement would you use as a liner?
RMGIC
composite resin
What would you use as a pulp cap?
hard setting CaOh or MTA
What is used as a sedative dressing?
ZOE (kalzinol, or coltisol for E free)
CaOH
what would you use for a bacteriostatic dressing?
CaOH sealed in with GI
List different elastomeric impression compounds
condensation cured silicone
addition cured silicone
poly sulfides
poly ether
List the hydrocolloid impression materials
Agar
alginate
What is alginate?
irreversible hydrocolloid impression material.
setting reaction of sodium alginate with calcium sulphate
Na alg + CaSO
What do you use to modify a stock tray?
Impression compound
What causes finning during casting?
cracks in the investment material
What are different components of PMMA?
PMMA beads, initiator (benzoyl peroxide), methacrylate monomer, cross linking agent, inhibitor (hydroquinone)
When would you use a tissue conditioner?
when relining a denture after implant placement for reduced pressure during osseeointegration
How does Zinc affect the setting of amalgam?
oxygen scavenger, causes delayed expansion
reduces creep and ditching
if exposed to water will release H2 bubbles and can cause pain
