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FORMS OF PULP CHAMBERS AND CANALS 447

mates in form that of the tooth itself. The opening of the canal is
seen to be almost circular, and in the central axis of the tooth.
Upper Lateral Incifor.—The chamber of the lateral incisor (Fig. 405)
has a similar form ; the canal exhibits a tendency to diverge from the
Fig. 406. Fig. 407. Fig. 408.

Upper lateral incisors (Ottolengui).
straight line toward the apical end (see Figs. 406-408). The entrance
to the canal is nearly oval.
Upper Canine.—The chamber of the upper canine is large and open
and has an elliptical canal entrance (Fig. 409j. The root of this tooth
Fig. 409. Fig. 410. Fig. 411.

Upper canines.
may also deflect from the line of the general axis. In rare cases a
bifurcation of the root is seen (Figs. 410, 411).
Fig. 414.

Upper first bicuspids.
The upper first bicuspid very commonly exhibits a bifurcation of
the roots which may extend to any distance toward the crown (Fig. 412).
At its entrance the pulp canal has a dumb-bell form, the handle of the
dumb-bell being much attenuated. The distinct canals may begin
almost at the base of the chamber, or be evident only near the apices