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PIVOT TEETH. 309

neck of the tooth, are accustomed to excise with
them the principal part of the crown at a single cut.
This method, however, is objectionable, since it

Fig. 57.

always gives too great a jar to the root, and is liable
to loosen, and, in many instances, to fracture it so as
to unfit it for the reception of the crown. But, in
every case in which an artificial crown is required,
the natural crown is very much decayed ; and, in this
condition, is very readily removed with excising for-

ceps, nipping it off in fragments, beginning where it
is weakest and thinnest, and encroaching on it till it
is all cut down—at least, as far as the forceps are
available. Yet care is necessary even in this man-
ner of using the forceps, lest the root be fractured or
too much jarred.
After such excision with the forceps, the root is to
be dressed down for the reception of the crown, with
a round, or, better, an elliptical file. But, for this