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COHESR^ GOLD IN THE MAKING OF FILLINGS BY CLASSES 133

ceased to progress because of the cleanliness of such surfaces, due
to the lack of the egress of food substances.
The Last Portions of Gold. After leaving contact point the last
portions of gold are added to restore normal contour or as near that
condition as occlusion and articulation will permit giving special
care to complete covering of the cavo-surface angle at all points.
Filling Class Two With Matrix in Position. This maj- be done,
and is advised by some operators, who advance the theory of addi-
tional condensation due to the presence of the substitute for the
missing wall.
When the matrix is used it should not be adjusted till the gin-
gival cavo-surface angle is covered. It should be thoroughly wedged

Fig. n.—Burnishi!\g back excess gold foil in covering the gingival margin.
at the gingival. The matrix should be removed just before the gold
has been built to the height of contact point.
The Use of the Separator in Class Two. In cases where prelim-
inary separation has not been made, a mechanical separation should
be adjusted and tightened at short intervals to the full extent of
safety. This will permit of better and more thorough finishing of
contact point as the slight space resulting will be taken up, upon
the removal of the separator.

Class Three. Proximal in the Six Anterior Not Involving the Angle.
Starting the Gold, in cavities class three, is the same in large or
small cavities. The gold is first condensed into the wedge-shaped
convenience angle farthest from the viewpoint of the operator which
is the gingivo-axio-lingual angle. The gold is kept in this triangular