Page 177 - My FlipBook

FILLING TEETH i6r

then find its way out at the margins, and may at
once be cleared away. It occasionally happens
that an operator is tempted to fill a cavity with
gold when the retainage is inadequate ; the filling
proceeds satisfactorily until the trimming process is
nearly completed, when the filling comes out, or
the patient may return in a few days with the
filling in her purse. If it has been at all well
condensed it may be replaced with a cement lining,
just like an inlay; it will not only stay in place
and give complete satisfaction, but will constitute
an inlay with ideal margins. If the filling comes
out before the polishing is finally completed, it may
be finished at another sitting when the 'cement is
completely set. The retention of a "gold-filling
inlay," will be completely satisfactory, owing to the
slight roughness of its interior surfaces, its close fit,
and the manner in which cement adheres to metal
as opposed to porcelain ; and if one of these
accidents occurs in a mouth in which there are
several other gold fillings, it will be impossible
to detect which is the filling that has been
cemented in.
Separation of the Teeth.—In filling cavities on
approximal surfaces, more especially if gold is to be
—
used, it is necessary particularly in the incisor
L