COMPLETE DENTURES DENTURE REBASING

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					                               COMPLETE
DENTURES
113B

                                      DENTURE
REBASING

                                    References:



Yellow
AFP:
pages
135‐136





1.
T
or
F:_____
Rebasing
a
denture
involves
refitting
the
denture
using
a
corrective
impression
(as
in
a

reline)
and
replacing
all
the
denture
base
material
with
new
acrylic
resin.




       
       ANSWER
=
TRUE




2.
T
or
F:_____
Rebasing
can
be
done
for
those
dentures
whose
base
material
is
discolored
after
being

used
for
years,
or
for
dentures
that
have
been
repaired
several
times.



       
       ANSWER
=
TRUE


3.
T
or
F:_____
Rebasing
is
done
frequently
because
acrylic
teeth
in
most
old
dentures
show
advanced

wear
and
are
not
serviceable.
Rebasing
is
the
best
way
to
make
the
teeth
serviceable
again.



       
       ANSWER
=
FALSE
(Rebasing
does
not
restore
worn
denture
teeth,
and
is
not
done


       
       
    
       frequently)


4.
T
or
F:_____
Rebasing
an
old
denture
is
a
great
deal
quicker
than
making
a
new
one.



       
       ANSWER
=
TRUE


5.
T
or
F:_____
Rebasing
is
the
treatment
of
choice
when
the
time
factor
is
important
or
when
the

teeth
are
in
good
condition.



       
       ANSWER
=
TRUE


6.
A
rebased
denture
serves
as
the
perfect
temporary
prosthesis
while:



       a.
replacement
teeth
are
ordered
for
the
denture



       b.
a
new
denture
is
being
made.



       c.
the
patient
prepares
for
implant
surgery



       d.

the
denture
is
set
for
relining.



       
       ANSWER
=
B







7.
T
or
F:_____
Since
the
denture
base
material
is
completely
removed
in
rebasing,
there
must
be
a

means
of
maintaining
the
relationship
of
the
teeth
to
each
other
and
to
the
ridge
while
the
denture

teeth
are
without
support.



       
        ANSWER
=
TRUE


8.
Articulators
were
extensively
used
to
maintain
denture
tooth
relationships,
but
are
no
longer
used

because:




       a.
their
parts
occasionally
move
or
bend



       b.
articulators
are
not
accurate
enough
for
this
purpose



       c.
dentures
should
never
mounted
into
articulators



       d.
they
are
antiquated
now
that
face
bow
transfers
are
readily
available.



       
        ANSWER
=
A


9.
Instead
of
using
an
articulator,
tooth
relationships
are
better
maintained
by
using
a:



       a.
reline
rig
   b.
reline
articulator
   c.
reline
jig
    d.
reline
vice



       
        ANSWER
=
C


10.
From
the
list
below,
choose
the
procedures
for
using
a
reline
jig
when
doing
a
denture
rebase.



       a.
Pouring
the
cast



       b.
Flask
the
denture



       c.
Mount
the
assembly
in
the
jig



       d.
Build
an
occlusion
rim



       e.
Recover
the
denture
teeth



       
        ANSWER
=
a,
c,
e



















11.
After
the
dentist
makes
the
impression
as
described
for
a
reline,
the
next
step
in
making
a
denture

rebase
is
to:



       a.
box
and
pour
the
impression.




       b.
build
a
fresh
occlusion
rim



       c.
flask
the
denture



       d.
boil
out
the
impression



       
       ANSWER
=
A


12.
T
or
F:_____
After
boxing
and
pouring
an
impression
for
a
denture
rebase,
once
the
artificial
stone

has
set,
you
should
trim
the
cast,
and
index
the
base.
Replace
the
missing
or
broken
teeth
and
wax

them
in
position.



       
       ANSWER
=
TRUE


13.
T
or
F:_____
Once
the
teeth
are
waxed
in
position
for
a
denture
rebase,
you
may
remove
the

denture
from
the
cast,
then
separate
the
teeth
from
the
denture
base.



       
       ANSWER
=
TRUE


14.
For
rebasing
porcelain
teeth,
you
should
heat
the
teeth
and
the
adjacent
acrylic
resin
slowly
with

an
alcohol
torch
because
rapid
heating
can:



       a.
shatter
the
denture
teeth




      b.
cause
the
porcelain
teeth
to
explode



       c.
melt
the
porcelain
teeth



       d.
crack
the
teeth



       
       ANSWER
=
D



15.
To
distribute
the
alcohol
torch
heat
more
evenly,
it
is
a
good
idea
to
apply
a
thin
film
of

___________
on
the
teeth.




       
       ANSWER
=
Vaseline










16.
When
heating
acrylic
resin
with
an
alcohol
torch
for
the
purpose
of
removing
denture
teeth,
you

will
be
able
to
pry
porcelain
teeth
loose
once
the
acrylic
resin




       a.
turns
white
 
                   

                                    b.
melts
        c.
ignites
     d.
smolders



       
           ANSWER
=
A


17.
Applying
small
amounts
of
____________________
to
the
lingual
aspect
of
each
denture
tooth
to

join
them
together
as
a
unit.



       
           ANSWER
=
Baseplate
wax


18.
For
rebasing
acrylic
teeth,
you
should
use
heat
to
remove
the
base.




       
           ANSWER
=
FALSE
(you
should
not
use
heat
when
removing
acrylic
denture
teeth)


19.
Separating
acrylic
resin
denture
teeth
from
the
old
denture
base
in
three
sections;

__________________,
________________________,
and

_______________________.



       
           ANSWER
=
anterior,
right
posterior,
and
left
posterior.


20.
Circle
all
that
apply:
Separating
a
denture
base
from
acrylic
teeth
should
be
done
using:




       a.
discs




       b.
burs




       c.
abrasive
wheels



       d.
polishing
wheels



       e.
polishing
lathes



       
           ANSWER
=
A,
B,
C


21.
JEOPARDY
QUESTION:
“
When
removing
denture
base
material
from
acrylic
teeth,
all
acrylic

material
must
be
removed
from
the
denture
except
for
a
small
amount
on
the
this
portion
of
the

denture
teeth,
after
which
the
tooth
segments
are
placed
back
into
the
index.”



       
           ANSWER
=
What
are
ridgelaps?













22.
Arrange
the
steps
for
reconstructing
the
denture
base
in
wax
into
their
proper
order:



       a.
flask,
boilout,
and
recover
the
denture




       b.
Seal
the
baseplate
wax
to
the
teeth
and
to
the
cast.




       c.
Make
alternating
turns
on
the
thumb
screws,
and
close
the
top
plate
of
the
reline
jig
down

     


       



until
it
makes
contact
with
the
shoulders
of
the
posts.




       d.
Use
enough
wax
so
it
presses
down
around
the
teeth
and
up
around
the
ridge
of
the
cast



       e.
Wax
and
contour
a
denture
base
in
the
usual
manner.
When
the
wax
cools
completely,
open

 



       




the
jig
and
complete
the
wax‐up
in
the
conventional
manner.



       f.
Place
a
softened
roll
of
baseplate
wax
on
the
teeth.



       
       ANSWER
=
F,
D,
C,
B,
E,
A


23.
T
or
F:_____
Flasking,
boilout,
and
packing
procedures
for
performing
a
denture
rebase
are
the

same
as
those
for
making
a
completely
new
denture.




       
       ANSWER
=
TRUE


24.
T
or
F:_____
If
time
is
a
factor,
compression
molded,
self‐curing
resin
or
the
fluid
resin
method
of

denture
base
processing
can
be
used
to
complete
the
rebase.



       
       ANSWER
=
TRUE


25.
T
or
F:_____
Rebased
dentures
should
be
finished
and
polished
in
the
same
manner
as
a
new

denture.



       
       ANSWER
=
TRUE


26.
T
or
F:_____
If
occlusal
discrepancies
are
serious
enough
when
the
dentist
checks
the
denture
in

the
p0atient’s
mouth,
the
dentist
initiates
the
denture
remount
procedures.



       
       ANSWER
=
TRUE


				
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