Page 751 - My FlipBook

PEOMINE^^T CANINES AND DEPRESSED LATERALS. 749

incisors backward, or rotating them, as is often necessary in such
cases.
Fig. 729.

Labial bow added tu rLtrai,tin„' appliance.

If either canine needs rotating, a rubber band will be needed on
one side of the tooth only, and
Fig. 731.
the hook may be so placed on
the band that the tooth will be
rotated while it is being drawn
back.
Prof. Angle advises the use

Fig. 730.

Stationary anchorage (Angle). Angle's drag-screw.
of the drag-screw for retracting canines, as shown in Fig. 730. By
soldering a long tube to two bands which are cemented to two teeth,
and extending the drag-screw through this tube, he reduces to a mini-
mum the possibility of the teeth tilting. This appliance is very
effective. The position in which the hook is attached to the canine
band will depend on whether it should be rotated or not in retraction.
(See Fig. 731.)
After the canines are moved to their new position the same appli-
ance may remain as a retainer. It will be found that a canine moved
into its proper place, when room has been made by extraction, will need
retention less than any other tooth.
Greater anchorage may be obtained by a plate such as shown in
Fig. 732, for it impinges upon the anterior alveolar ridge and in-