Page 221 - My FlipBook

FILLING BY CLASSES AND MODIFICATIONS. 217

is requisite to give these fillings a perfect finish, on
account of the irregularity of surface, this, in many

instances, being both convex and concave. As a
material for filling these cavities, adhesive gold is
much to be preferred. Indeed, in many of them it
is impossible, with non-adhesive gold, to make a per-
fect filling, because they have no general embracing
form. In such cases, the filling should be introduced
from the palatal side of the tooth.
2d Mod.—The labial wall of the cavity broken.
The fractures of this wall are of various forms, and

in extent corresponding with the amount of decay
and the friability of the enamel. There is sometimes
the triangular notch, extending far toward the middle
of the tooth; and sometimes there are two or three
small notches; and still in other cases, almost the
whole of the wall will be broken away from the point

to the neck of the tooth. When there is simply a
notch in the enamel, it is important for the appear-
ance of the tooth to fill it up; and when there is any
prospect of success, the remaining portion of the wall
being retained, the operation is to be performed as
already described for the palatal wall. It will, how-
ever, in many cases, be necessary to cut away part of
the remaining portions of the wall, leaving the general
form of the border somewhat circular; though the notch

form, in some instances, is not wholly obliterated.