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Picture 12 Picture 13 Picture 14
4.1.7 The acute inflammation surrounding the apex has been gone and the infected
material has been cleaned. It is also necessary to get rid of the pulp and necrosis
tissue.
4.1.8 The following cases are not suited for a normal measurement:
a) The size of the root similar to the size of apical foramen.
In this case, the measurement result of the length of the root canal will be shorter
than its real because of the hypoplasia of the root [Picture 12].
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
