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FILLING TEETH 89

advantage. Right-angle force applied directly to
tlie labial wall, the cutting edge, and the floor of the
cavity, is now resorted to, still continuing to turn
the gold over the labial wall. Obtuse-angle, right-
angle, and corkscrew pluggers will all be found
useful at these parts, and hand pressure will be
found needful in very many of these cavities that
are opened into, and filled from, the lingual surface.
Working by reflection in the mouth mirror is usually
a convenience, and often a necessity, in these cases.
It is also frequently a convenience to force a pellet
of non- cohesive gold into the angle or pit at the
cutting edge, and this often secures a better adapta-
tion at the bottom of the angle or pit. In filling these
cavities from the labial surface, the method of pro-
cedure is very similar, except that if a starting pit
is used, it should be drilled at the cervico-lingual
angle, and the foundation worked across to the
cervico-labial angle. The labial wall becomes what
the lingual wall was when filling from the back, and
vice versa, and the preparation of the cavity, and the
packing of the gold, is regulated accordingly. A mallet
can generally be easily and accurately used from the
labial surface, and the force applied in any direction,
as the exigencies of the case demand. The careful
turning over of the gold will take place at the lingual
instead of at the labial wall. Unless a very wide