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FILLING TEETH 35
from " Principles and Practice of Filling Teeth,"' by
—
Dr. C. N. Johnson, page 172, first edition: "The
chief distinction in this connection between foil
and crystal gold is that foil demands care, and so
expresses itself at every turn, while the other
demands equal or greater care, but seems con-
stantly to give the impression that it does not."
Crystal gold should be carefully torn up or
separated into smaller pieces with fine-pointed foil
carriers or tweezers, or with needles set in handles
cutting it up, even with a razor, compresses it in an
undesirable manner. Within reasonable limits the
looser the texture of this gold the better— the
No. 1 Watts' crystal gold in the block or cake
form, for instance, is the most satisfactory form of
this particular make. Different makes or pre-
parations of crystal gold vary somewhat in their
working properties, and admitting that some makes
may be better than others, it may easily happen
that an operator will prefer a certain preparation
merely because its Avorking properties suit his fancy.
Any attempt to institute a comparison between
the various forms of crystal gold that are now manu-
factured would demand a large number of carefully
carried out experiments, in the absence of which
the writer does not feel justified in expressing an
opinion in these " Notes " as to their relative merits.
FILLING TEETH 35
from " Principles and Practice of Filling Teeth,"' by
—
Dr. C. N. Johnson, page 172, first edition: "The
chief distinction in this connection between foil
and crystal gold is that foil demands care, and so
expresses itself at every turn, while the other
demands equal or greater care, but seems con-
stantly to give the impression that it does not."
Crystal gold should be carefully torn up or
separated into smaller pieces with fine-pointed foil
carriers or tweezers, or with needles set in handles
cutting it up, even with a razor, compresses it in an
undesirable manner. Within reasonable limits the
looser the texture of this gold the better— the
No. 1 Watts' crystal gold in the block or cake
form, for instance, is the most satisfactory form of
this particular make. Different makes or pre-
parations of crystal gold vary somewhat in their
working properties, and admitting that some makes
may be better than others, it may easily happen
that an operator will prefer a certain preparation
merely because its Avorking properties suit his fancy.
Any attempt to institute a comparison between
the various forms of crystal gold that are now manu-
factured would demand a large number of carefully
carried out experiments, in the absence of which
the writer does not feel justified in expressing an
opinion in these " Notes " as to their relative merits.
