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b) Bleeding or the blood overflow from the apical foramen.
In this case, the blood will overflow from the root canal and reaches gingival
that the blood and the gingival will be on a conducting state which will cause an
inaccurate result while measuring. The measurement can be continued when the
bleeding is stopped [Picture 13].
c) The tooth crown is broken.
The tissue of the gingival may reach the cavity of the endo hole at the broken
point which will cause inaccuracy because of the electronic conduction. The
measurement can be continued when the crown is fixed by gypsum or other
insulators [Picture 14]
Picture12 Picture13 Picture14
d) There is a crack on the tooth root.
In this case, the crack may cause the electric leakage which will affect the
accuracy of measurement [Picture 15].
e) A retreatment to an endo which was filled with gutta-percha.
Clean the remaining material in the root canal and fill it with little normal saline
before a measurement [Picture 16].
f) There is a metal crown which has connected to the gingival.
It will cause an inaccuracy when the endo file touches metal crown [Picture 17].
