Card Set Information
ch17 provisional restorations
how long is a provisional restoartion in the mouth?
why is a provisional used in the anteriors?
if a tooth is prepped and no provisional is placed what will happen?
tooth migration within DAYS
what happens if a provisional is too high?
results in occlusal trauma
if the provisional is overcontoured what happens?
it does not allow for self cleansing
what happens if a provisional is undercountoured?
force food into gingiva
a well _____ provisional with good ____ will protect from margin _____ and marginal ____ of bacteria and oral fluids
what can cause irritation of the periodontal tissues?
over contoured, overextended and overhanging margins
what could irriation of the periodontal tissues result in?
how long are provisional materials recommended for?
what provisional material is used for intracoronal use only?
cements (SEDATIVE filling)
what is used most often for pedo crowns?
what is the most esthetic crown?
t/f preformed crowns are used for single tooth and bridges
false! single tooth only!
SSC crowns must be _____ and ____ at contacts and margins with contouring pliers
crimped and contoured
celluloid and polymer crowns usually require what?
reline of acrylic or composite resins
what is the choice for template material of customized provisionals?
vacuum formed plastic
what type of technique uses a template of the tooth taken before the prep?
do acrylic provisionals have high or low shrinkages?
why might a pt complain about acrylic provisionals?
heat release and odor release
what must be done to the acrylic provisional to prevent heat buildup?
pump it! LOUDER! pump it!
what is done to prevent locking of the acrylic material to the tooth
t/f heat from the acrylic provisionals can kill tooth pulp
what type of provisional material has low shrinkage and heat release during curing?
what type of provisional material has good strength, less wear and biocompatible?
if a resin cement is used on a final restoration what material cannot be used as an intracoronal cement?
Zinc Oxide Eugenol ZOE
what is used for palliative sesitivity or trauma as an intracoronal cement?
zine oxide eugenol ZOE
what are the limitations of a provisional?
esthetics: imperfect color, anatomic contours and smoothness is poor
how should the pt be instructed to floss their provisional?
pull floss through not up and out
what can be used to reseat the provisional until a DDS can recement?