Poldent Endostar, Instructions For Use Manual, Page: 17 / 40

16 Instructions for Use 2019-03-20
Clean
Build-up
Fracture
Branch
Gutta-Percha
Root Canal Not Suitable for Electronic Measurement
Accurate measurement cannot be obtained with the root canal conditions shown below.
There may be cases other than these where an accurate measurement cannot be made.
Root canal with a large apical foramen
Root canal that has an exceptionally large apical foramen due to a
lesion or incomplete development cannot be accurately measured;
the results will show shorter measurement than the actual length.
Root canal with blood, saliva or a chemical solution overflow-
ing from the opening
If blood, saliva, or a chemical solution overflows from the opening
of the root canal and contacts the gums, this will result in electrical
leakage and an accurate measurement cannot be obtained. Wait
for bleeding to stop completely. Clean the inside and opening of
the canal thoroughly to get rid of all blood, saliva and chemical
solutions and then make a measurement.
Broken crown
If the crown is broken and a section of the gingival tissue intrudes
into the cavity surrounding the canal opening, contact between
the gingival tissue and the file will result in electrical leakage and
an accurate measurement cannot be obtained. In this case, build
up the tooth with a suitable material to insulate the gingival tissue.
Fractured tooth
Leakage through a branch canal
Fractured tooth will cause electrical leakage and an accurate mea-
surement cannot be obtained.
A branch canal will also cause electrical leakage.
Re-treatment of a root filled with gutta-percha
The gutta-percha must be completely removed to eliminate its
insulating effect. After removing the gutta-percha, pass a small file
all the way through the apical foramen and then put a little saline
in the canal, but do not let it overflow the canal opening.