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FILLING TEETH 85
work to iiimutely describe the filling of nuuibcrs of
cavities in all sorts of positions, each of which may
present instructive peculiarities. It is intended
merely to allude to the filling of certain cavities ; for
it is presumed that an operator who has once grasped
general principles will be able to modify them as
circumstances may demand.
Cohesive Gold.—To fill a very small occlusal cavity,
or a very small cavity in any exposed position, take
a small pellet of gold, and simply press or hammer
it in. A cavity of this size may be considered as
similar to a starting pit, and filled accordingly.
Pack in other very small pellets one by one, attach-
ing them to the previously condensed gold until the
cavity is full. To fill a cavity a little larger than
this, press in a larger pellet of non-cohesive gold,
and hold it down, if necessary, with an instrument
held in the left hand, until it is packed just suffi-
ciently to stay in place without rocking. If this is
not accomplished, remove the pellet and insert
another one, pressing it to one side of the cavity,
and insert and wedge in other pellets between the
first one and the other walls of the cavity, until a
sufficient mass has been introduced to stay firmly
in place, when the whole of this gold is pressed
directly on to the floor. By the use of two in-
struments, one to hold the gold and the other to