Page 49 - My FlipBook

FILLING TEETH 33

The writer has made considerable use in his
practice of A. J. Watts' crystal gold during
eighteen years, and has always found it to be
an excellent and reliable preparation. He has
also used several of the more modern productions,
and finds some of them appear to be very good
preparations. A good make of crystal gold is a
fascinating kind of gold to use, and although one
who is accustomed to foil may at first fail to
satisfy himself, it will be found that a familiarity
with the material rapidly causes any difiiculties of
manipulation to disappear, and one soon forgets
that its use was ever attended with difficulty or
disappointment. It is very important, however, to
realise that it is extremely easy to make bad fillings
with crystal gold, and that those preparations which
possess the property of " staying in place" in a.
cavity without rocking or balling up, no matter how
large the piece may be, or how carelessly it may be
placed in position, lend themselves particularly well
to imperfect work. If a crystal gold filling is to be
welded into a coherent mass (and. the very struc-
ture of this gold particularly demands this) and well
adapted to the cavity walls, it must be worked with
as much care and thoroughness as cohesive foil. All
the rules that apply to foil fillings apply with equal
if not greater force to crystal golds, with the excep-
c