Page 204 - My FlipBook

1 88 THE TREATMENT OF TEETH
during the manipulation of the body to make this
hole it is found to be too wet, blotting-paper should
be applied until sufficient moisture is absorbed to
enable the body to be properly and easily mani-
pulated. One or more of the little balls of silex is
then picked up with the point of the brush, and placed
in the cavity that has been made in the inlay body
until it is filled up to the right height, care of course
being taken not to build up the silex too high. In
large inlays that admit of a large central cavity, the
balls of silex may be gently patted down with an
instrument, so that they crush up into a more even
mass. In very many cases, merely placing the pieces
of silex in exact position with the brush is all that is
necessary or advisable. The body is then fused,
and this will leave some of the silex projecting,
owing to shrinkage of the body. A fairly stifif
mix of the body is then carefully placed round
the margins of the matrix, and carefully worked
from the margins towards the centre and over the
silex. The object of this is to fill up the matrix and
cover over the silex without disturbing the latter.
Another fusing will perhaps still leave the top of
the silex exposed ; the same procedure is resorted
to until it is completely covered or embedded in
the fused inlay. Then the contour is built up, and
the inlay completed in the usual way. When the