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INTERDENTAL SPLINTS. '31

and close tlieni in tlic usnal way. Jn \ulcanizing-, allow
the mercnry one honr to rise to 320° ¥. When this point
is reached the temperature should be kept uniform for one
hour or more.
Finishing.—When the llask is taken from the vulcanizer
and has become cold, carcfuly remove the plaster and tin-
foil from the rubber. In trimming", the rubljer should be
cut away nearly to the necks of the teeth and the edges all
Fig. 88.

nicely rounded. The opening made in the splint for feed-
ing purposes should be in front if possible, and large
enough to allow for the free passage of a feeding-tube and
should have the edges well rounded. The entire piece
should be nicely polished, and no ragged or sharp edges
left. Fig. 87 represents the completed splint. It is often
advisable to make openings through the top or side of the
splint against several teeth adjoining the fracture, so that
it can be determined when the fractured surfaces are in
place. This plan is represented in Figs. 87 and 88.