Page 322 - My FlipBook

318 PIVOT TEETH.

the wire from the canal, and it is ready to receive the
pivot with the crown attached. Some operators form
the wood pivot of such a shape as to fit into and fill
the enlarged cavity. Another method is, after the
pivot is fastened into the crown, to build round it, on
the base of this, a portion of Hill's stopping, of about
the size and form of the enlargement in the canal;

and then, the tooth being ready to insert, soften the
stopping by heat, and introduce carefully into place.
The os artificial in such cases is still better.
It frequently happens, in c::ses where the pulp
has been dead for a considerable time, that there is
more or less discharge through the canal of the root,
and a tooth is required immediately, or at least
before there is time for treatment to abate the dis-
charge. To such a condition some arrangement
must be adapted, so as not entirely to close up the
canal, and preclude the escape of pus. For this pur-
pose, a groove may be cut down the wall of the canal,
or, perhaps better, on the side of the pivot through-

out its length, for the discharge of the secretion.
Where there is irritation or liability to inflammation,
a temporary pivot of soft wood, or of hard wood
loosely fitted, should be worn ; for thus the root is
less jarred by percussion on the crown, and, if need
be, the crown and pivot can be removed.