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154 FILLING TEETH.

INTRODUCING THE FILLING.

Having, in all the steps for the preparation of the
cavity, made thorough work, the next thing to be
accomplished is the introduction and consolidation of
the filling. The manner of performing this part of
the work will be governed by the kind of material

employed, and also, somewhat, by the form of the
particular material, as well as the method adopted.
Some materials, as gold, for instance, may be used in
three or four different forms, each involving a princi-
ple peculiar to itself; and each of these forms is
susceptible of being used in different ways. It is
proposed to describe, as clearly and concisely as
possible, the various methods of filling that have
been found efficient. This is the more important since
different operators differ in their election of methods
some preferring one, others another; the result of
mere choice, habit or some peculiar fitness.

The first method for consideration is that of filling
with ordinary non-adhesive gold foil. The principles
applicable to the use of this kind of foil also obtain in
the use of foils of other metals. Gold is used far more
than any thing else. The common, and, indeed, the
almost universal method of using foil, in the early
periods of the profession, was in the form of a roll, or