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2 24 THE TREATMENT OF PULPS

to fill. However, a realization of these anatomical conditions
should redouble the painstaking care exercised in canal
sterilizing and filling procedures.

Fig. 266.—Canal imperfectly opened Fig. 267.—Poor canal operation in
and filled in a bicuspid. the second bicuspid.

The introduction of the X-ray has resulted in great im-
provement in the methods of diagnosis and treatment of these
conditions. All roots which are to be treated and filled should

be subjected to the Roentgen ray at the beginning, and at

Fig. 268.—Imperfect canal Fig. 269.—A good canal
operations in the upper central filhng, radiographed immedi-
and lateral. ately after completion.

frequent intervals during the progress of the various proce-

dures, as well as at the completion of the root filling opera-
tion, in order that the progress of the work may be revealed
and the final results shown.