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CELLULOID AS A DENTAL BASE. 75

edge of the teeth, and the other point marking permanently
the plaster, you have always in the (li\-iders so set, a gauge
for the length of any particular tooth. A convenient sub-
stitute for the dividers may be formed from a piece of wire
of convenient length, one-half the diameter of a common
excaxator, by suitably twisting its middle for a handle,^ and
its ends being sharpened, and pointing in the same direc-
tion, one or one and a half inches apart.
Thus far we proceed as we do for ordinary gold work.
\\'e will now suppose the teeth ground, leaving as much
space between the teeth and plate as the plate will admit
of. We next mark with a sharp-pointed instrument, on

Fig. 43.

the labial surface of the plate, each point where it is neces-
sary to place a loop for purposes hereinafter described.
Then apply wax to external or labial parts of the teeth and
plate, in any manner sufficient to retain the teeth in position,
remove the wax from the lingual parts of the teeth and
plate, and mark the position on the metal and solder on
loops or pins.
Pickle, dress, and polish that portion of the plate to be
exposed to view. Bend and flatten the pins, arrange the
teeth according to the articulation, waxing so as to cover
up the loops if practicable; the loops should be placed as
near the base of the teeth as possible, the celluloid forming,
when finished, a part of that general concave shape which