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798 ORTHODONTIA AS AN OPERATIVE PROCEDURE.

of the ferrules near the ends of tlu; teeth, as represented hv Fig,
824."
Fig. 825 shows another of Dr. Farrar's appliances for the same
purpose, which makes use of a labial bow for retaining the ends of

Fig. 825.

Farrar's appliance for moving roots forward.
the incisors, and omits the transpalatal jack, thus simplifying the
apparatus.
Fig. 826 shows Dr. Farrar's appliance for drawing back the roots
of upper incisors. " The crowns
are stayed by an inside rectan-
gular frame resting in U-shaped
lugs at the ends of the crowns
and braced against nuts soldered
to two anchor clamp bands on
the side teeth. The roots are
drawn back by a labial bow, at-

FiG. 827.

Farrar's appliance for moving roots back. Cross section.
tached to the clamp bands by screws. Fig. 827 shows a cross section
of such an appliance.