Nouvag TCM Endo V Mode D'emploi page 20

TCM Endo V
Build-up
Gutta percha
Crown
There may be other cases that an accurate measurement cannot be made.
4
Root Canal with blood or saliva overflowing from the
opening:
If blood or saliva over-flows from the opening of the root canal
and contacts the gums surrounding the tooth, this will result in
electrical leakage and accurate measurement cannot be
obtained. Wait for bleeding to completely stop before taking 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:
Fractured tooth will cause electrical leakage and an accurate
measurement cannot be obtained.
Re-treatment of a root filled with gutta-percha:
In this case, the gutta-percha must be completely removed
before a measurement is made. First pass a small file all the
way through the apical foramen and then fill the root canal
with a saline solution before taking measurement.
Crown or metal prosthesis touching gingival tissue:
Accurate measurement cannot be obtained if the file touches
a metal prosthesis that is touching gingival tissue. In this
case, widen the opening at the top of the crown so that the file
will not touch the metal prosthesis before taking a
measurement.
NOUVAG AG
No. 31943 35/05