Page 194 - My FlipBook

i8o METHODS OF FILLING TEETH.
until the line of the tooth-neck is reached. Beyond this it becomes
to observe the caution in in order to
necessary greatest proceeding,
determine how far such enlargement may be pursued, whether or not
connected or whether or the
the canals are normally throughout, they
In 212 wherein
roots are bifurcated . Fig. is shown a first bicuspid
the canals are probably united in this way throughout, as I judge by
holding the specimen up to the light so that the canals are indicated,
and by the further fact that they emerge at a single foramen. Yet
FIG. 214. FIG. 215. FIG. 216. FIG. 217.

observe the curious distortion of the root, and it is plain that enlarge-
ment within the canals would be a procedure requiring the utmost
would be of doubtful
care, whilst complete root-filling possibility.
In is shown a tooth the roots of which are united, but
Fig. 213
examination by passage of light discloses the unmistakable fact that
the canals are bifurcated from foramina to tooth-neck. Fig. 214
would show similar canals, though here the roots also are completely
bifurcated. Either of these cases would be readily cleansed and
filled ; but Figs. 215 and 216 show conditions where this would not
as the roots are not curved.
be so simple, only bifurcated, but badly
FIG. 218. FIG. 219. FIG. 220. FIG. 221.

The obstacles thus offered are more shown in
plainly Fig. 215 than
in Fig. 216, for the reason that in the latter the worst curve could
only be seen from a different view of the tooth, the roots being bent
toward the median line of the jaw. In Fig. 217 is seen a root from
which the crown has been lost. Here we have trifurcation which pro-
duces three roots, and it is plain that the two smaller would be quite
troublesome.
The second bicuspid is usually single-rooted, though even here