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IONIC MEDICATION 253

sealed in the canal for 24 hours, at the end of which time the
treatment is repeated and the solution sealed into position

for another 24 hours. A third application is made in the same
manner on the return of the patient, and left in position for
48 hours, at the end of which time the case is ready for filling,

if all evidences of putrefaction have disappeared. Dich-
loramin-T, owing to the fact that it is an active lymphagogue,

usually produces a marked serous discharge, which, it is
claimed by the advocates of the method, is an advantage,
especially in cases of septic conditions at the root end, on
account of the increased tendency to produce efficient

drainage.
IONIC MEDICATION: (Ionization).
During the past few years ionic medication of septic root
canals and of infections of the periapical tissues has come into
some prominence. This method of treating conditions of
this nature has been recently advocated by M. L. Rhein,

Weston A. Price, George T. Fette, and Sturridge, of England.
At the present time, it may be said, that the results obtained
are not satisfactory and, unless improvements are made in

the technic of application, the method is likely to be entirely
abandoned.
The process, consists in dissociating the ions of certain
salts in solution, by means of a mild electric current, and
thus driving them into the tooth structure and apical space.

Two prominent forms of appliance for this purpose are the
Ritter and the Mcintosh ionization equipment. These
appliances consist of current regulators and indicators for
controlling, regulating and indicating the strength of the

current, a cheek electrode, to be placed on the cheek of the
patient, a tooth electrode carrying a metallic point, to be
inserted into the canal to be treated, current and motor