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252 INFECTIONS OF THE PERI-APICAL TISSUES

of root canals and infected apical tissues, although it is still
in a state of experimentation. Its principal disadvantages
seem to be its marked tendency to produce irritation and an

excessive flow of lymph. Until additional work is done
with it, and its place is more definitely fixed, in the treatment
of these conditions, the author cannot recommend its use.
However, a brief description of the technic of its manipula-

tion is herewith given.
A per cent solution of the salt in chlorosane (chlorinated
5
paraffin) is recommended by Herman Prinz. Dichloramin-T
solutions deteriorate very rapidly, consequently, only fresh
solutions should be used and these should be kept in glass-
stoppered, amber-colored bottles, which protect them from

the light. The solutions should be kept away from heat,
light and contaminating substances of all kinds. To pre-
pare an ounce of the preparation, 25 gr. of dichloramiii-T

are added to i oz. of chlorosane, the mixture thoroughly
shaken, and the bottle placed in a pan of very hot water,
when, at the end of 15 minutes, complete solution usually
results. A few drops of the preparation should be removed
from the container with a glass rod and placed on a glass
tray ready for use.
Now, after opening the pulp chamber and canals, and

thorough drying under aseptic precautions, carry the solu-
tion into the canals on an absorbent point. Do not use
broaches for this purpose, as metals produce contamination

of the liquid. With a pumping motion, thoroughly moisten
the canals, and, in case of periapical complications, force the
solution through the apical foramen into the infected area.
The use of the warm air blast from a chip blower or hot air
syringe helps to further diffuse the oily liquid into the finer
ramifications of the canal or through the apical foramen.

A fresh point carrying the dichloramin-T solution is now