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Case 2
Bleeding or blood overflows from the apical foramen.
In this case, the blood will overflow from the root canal
and reaches gingival. 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 stops。
Case 3
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
Case 4
There is a crack on the tooth root
In this case, the crack may cause electric leakage which
will affect the accuracy of measurement
Case 5
A retreatment to a root canal which was filled with
gutta-percha. Clean the remaining material in the root
canal and fill it with little normal saline before a measurement