Page 715 - My FlipBook

Fig. 420. An outline drawing of a central incisor, with an excavated cavity exposing the pulp,
split mesio-distally to show the relations to the pulp chamber and canal to the cavity. The canal and
chamber are of such breadth as is usually found in young persons. It will be seen that it would be
difficult to pass a broach to the apex of the root canal because of the short bend that would be
required in entering the pulp chamber.
Fig. 4*21. A fissure bur is entered into the opening into the pulp chamber and the canal enlarged,
as shown, in such direction as to make the use of the broach easy. The canal is then cleaned with
nnich more ease and certainty of perfect work.