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CHAPTER XXI.
MANIPULATION OF COHESIVE GOLD IN THE MAKING OF
FILLINGS BY CLASSES.

Class One. Pit and Fissure.

, This class of cavities is the easiest of all in that they are sur-
rounded by solid walls of dentine with generally only one wall miss-
ing, which is the means of access to the cavity.
Starting the Filling. In the case of a small pit cavity it is gen-
erally well to start with a piece of gold that is sufficiently large to
more than cover the internal wall and condense the greater portion
with a rather large plugger point using hand pressure alone on this
piece. "With occlusal cavities the inner wall is the pulpal wall.
When the cavity is in an axial surface it is the axial wall.
A second pellet of gold may be added and condensed in the same
way. The mallet force should now be used on a smaller plugger
point going entirely around the cavity close to the walls holding the
shaft of the plugger at an angle of about 12 degrees centigrade to
the wall against which the condensing is being done.
In Occlusal Cavities the condensing should be in the central por-
tion first; then next to the distal wall; then along the buccal and
lingual walls and lastly the mesial wall. This plan of procedure
pertains to each separate layer of gold as it is applied when treat-
ing simple occlusal pits.
In Buccal Cavities the order of stepping is : first, center ; second,
gingival; third, distal; fourth, mesial; fifth, occlusal.
When the Cavity Has a Long Irregular Outline caused by the
following out of one or more rather long fissures the plan is the same,
except that the most distant arm of the cavity is filled first, allow-
ing the gold to gradually build toward the operator's viewpoint,
covering the base wall, portion by portion, with the plugger point
always at the given angle to this base wall, which permits of the
use of mallet force after the first pieces of gold have been securely
anchored along the disto-pulpal line angle.

Class Two. Proximal Cavities in Bicuspids and Molars.
Beginning the Filling. There are three distinct methods of start-
ing a filling of cohesive gold in this class of cavities. It is well if
both gingival point angles are sharpened to a convenience angle. It
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