Exam 3: Dental Provisional Materials Flashcards
3 main applications of provisional materials
- direct restorations
- crowns/bridges
- luting agents
calcium-hydroxide is ____
too weak
___ is never used as base material, as a luting agent, or as a temporary filling material
Dycal
materials that have been traditionally been used for temporary materials
zinc-oxide eugenol, non-eugenol cements
eugenol is a scavenger of ____; thus, eugenol-based
cements can ________ of the resin based cements resulting
in a ___ set material.
free radicals, compromise the polymerization, weak
Zinc-oxide non-eugenol is used when the provisional material will be used ________
in contact with other
resin-based dental materials
A variation of zinc oxide non-eugenol cement incorporates _______ to
reinforce the material
calcium sulfate (Cavit, 3M)
temporary crowns/bridges reasons of use: protection from
– thermal changes
– marginal breakage
– caries
– pulpal irritation
temporary crowns/bridges reasons of use: provision of
– pulp sedation – tooth stability – comfort – function – esthetics
B of BICMEP for temporary crowns/bridges
no excessive exothermic heat from setting, good thermal conductor
I of BICMEP for temporary crowns/bridges
capable of being easily bonded in place
C of BICMEP for temporary crowns/bridges
reasonably durable, inert to eugenol
M of BICMEP for temporary crowns/bridges
bulk = strength, rigidity
surface of material = hardness/abrasion resistance
E of BICMEP for temporary crowns/bridges
color, translucency, no staining
P of BICMEP for temporary crowns/bridges
easy to fabricate/repair, minimal dimensional changes on setting
3 main material types temporary crowns/bridges
- acrylic resins
- higher methacrylate resins
- filled dimethacrylates
_____ are almost the same as dental restorative
composites used for permanent direct restorations but with smaller amounts of fillers
filled dimethacrylates
Filled dimethacrylates (FD) are more \_\_\_\_\_\_\_ as acrylic resins (AC) and higher methacrylate (HM)
biocompatible as they are not as irritant
___ types of materials are normally bonded to tooth structures using zinc oxide eugenol or noneugenol cements.
all
FD is ___ than AC and HM, but the flexural strength (combination of strength and
toughness) is higher for ____ than for ____
harder, HM, FD and AC
Zinc-oxide eugenol and zinc-oxide non-eugenol are the usual choice for _______
provisional
luting agents
why are zinc-oxide eugenol and zinc-oxide non-eugenol are the usual choice?
they have limited durability because of hydrolytic degradation
