Page 320 - My FlipBook

316 PIVOT TEETH. —

with the artificial crown ; and this latter should

never press against the tooth, on either side of it;
indeed, it is better that there be a small interval on

each side.
When the crown is in its proper position, the hole
in the root and that in the crown do not always have
precisely the same direction ; in which case, a pivot
will be required, having a curvature according to the
variation ; and the extent and direction of such in-
flection, should be carefully observed while adjusting
the crown with the trying pivot. The pivot is to be
neatly and accurately fitted into the crown first, and
then the length of it required for the root, ascertained

with the gauge represented in Fig. 60. This gauge

Fig. 60.

consists of a wire of a size freely to enter the pivot-hole,
having a little slide with a flange attached. By in-
troducing this wire into the pivot-hole, the slide is
pressed back, and the depth of the hole indicated at
once. The pivot is then cut off accordingly, and
dressed to the proper size and inclination, and gently
pressed to its place with the thumb and fingers.
Before being introduced, however, it may be wrapped
with gold foil, which will serve to protect the dentine