
Is
the
canal
filled
with
blood
or
electrolytic fluids?
CF If
the
canal
is
f
chemicals, the m
when the file tip
illed
with
blood
or
eter
sometimes
jumps
fluid.
tn
a
breaks the surface of the
return
+
S
Case,
meter
activity
will
©
normal
as
the
file
approaches
the apex.
Clean off the surface of the tooth.
CF The meter will jump off scale if the file
touches the gums.
tooth
may be covered
with
The
g debris or chemicals.
cuttin
he
file may be making contact with
The
the gums-
e
too
much
pulp left
in
Sometimes
an
accurate
measurement
cannot be
made if a large amount of pulp
is left in the canal.
There may P
the canal.
Current may be leaking through a
ur
metal prosthesis.
The
meter
may
jump
if
current
leaks
through a metal prosthesis to the gums or
periodontal tissue.
be
leaking
through
[<> Caries on proximal surfaces can result in
faces
infected
with
current
leakage
and
make accurate
measurement impossible.
Current may
proximal sur
caries.
rey
avate
APEX at a branch |
due
to
The
mete:
canal.
Current leakage
may
be
branches off the main canal.
[C7
This increases the likelihood
of
electrical
contact between the canal
and the gums.
Wash the canal with oxydol if the results
are inconsistent.
Current
leakage
due
to
crown
lowered
by
removal
of
the
tectorium.
(7 Measurement is sometimes impossible in
this case.
The
apex
may
be
surrounded
by
a
pustule.
The
file
f
(7
(FP
Clean or replace the file holder.
broken.
Il
Meter does
Only when very near the apex. )
The
canal m-
Meter will
react correctly when file passe
through apical constriction.
The
apical
foramen
may
be
too
large.
If
the
apical
foramen
is
too
large
¢
incompletely formed, the meter may jum
suddenly when the file tip apprcaches tt
foramen.
|
Moisten the canal with oxy:
The
inside
of
the
canal
may
be
extremely dry.