post and core 2x Flashcards
non restorable criteria
no ferrule
post length greater than crown
80 too small, 120 too big
root perf, vertical fracture, vertical perio defect
guarded criteria
ferrule less than 1 mm post length = crown less than 90 file high lateral displacement forces (bruxism, long span FPD, distal extension RPD) apical seal less than 4 mm
good criteria
ferrule more than 2 mm
3/4 of root length and > crown length
greater than or equal to 100 mm file
avg/below avg lateral displacement (opposing teeth present, more anterior teeth)
when do you charge for a post space clean out
when the root canal was NOT done at OSU
is there a RUC charge in addition to P&C
no, the core is the RUC
what are the two appts needed for PC
undergrad ends for percha cleanout
CC clinic for measurement and placement of post and build up
are posts on molars common
no bc they undercut shape of pulp chamber is retentive
when can you perforate roots
cleaning out gutta percha
which drill is more dangerous GG or parapost
parapost is more aggro
what are preformed posts made out of
fiber or titanium
do you use the same drill for cast vs preformed
yeys
when is cast best
extremely tapered, funnel shaped canals
agency insurance only covers:
some only cover cast
ACC crown planned, what post?
fiber won’t produce shadow
what is less prone to dislodgement/root fracture, fiber or metal
fiber bc similar to dentin
which is easier to cement metal or fiber
metal (luting cement)
are posts retrievable
hypothetically yes bc luting cement used but not really
what will endo tell you
color (SIZE of post)
length (to which they removed gutta percha)
what drill will you use when preparing post space
the first drill that does not go to the full length of the cleaned out part of the canal. start with smallest and go until one binds
where should you cut the post down to
1 mm below prepared tooth
what happens if you leave the post too long
It will cause sparks when you try to do crown prep
what is default choice for cementing metal core
relyX luting
cementing metal steps
squirt cement into hole, lentulo FORWARD ALWAYS
helper coats post
pick up with cotton pliers and pump It into canal
what is a downfall of lentulos
can screw into gutta percha leading to separation
