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aoo THE UPKRATION OF FILLING CAVITIFS.

cotton tn|)(» chariiod with })vinnce of oxceedinii,' fineness. If there are
places where tiie tape cannot he made to reach, a soft-rubher wlieel in

¥ui. 269.

Aiiproxiinal trimmers.
the handpiece of the engine and charged with the same powder may
be nscd (Fig. 270).
Fillings in the bicuspids and molars because of theii* inaccessible
position are often most difficult to finish, and for this reason should
receive unusual care. If a matrix has been used at the cervical border,
and has been made to fit the tooth perfectly at or near the gum, it
will be found that the finishing process has been simplified in a great
measure, because there is less overlapping of the gold at this ])oint.
Fig. 270.
^^W^
^'Hh

Soft-rubber disks.
The pointed files, right and left, as shown in Fig. 268, are admirably
adapted to dressing away any overlapping of gold at the cervical border.
Fio. 271.

Sandpaper dislis.
With these and the trimmers shown in Fig. 269 the general outline
of the filling may be obtained, after which the emery and corundum
tape may be used and the filling polished after the same mann(>r as