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P. 718
716 ORTHODONTIA AS AN OPERATIVE PROCEDURE.
niolnr hand. The luc^ may be easily made by properly shaping the
projeeting ends left after soldering the band. The teeth selected
for an(;h()rage should be as nearly as possibk' in line with the move-
ment desired, and it is best in many cases to solder a bar on the lingual
surface of the anchor band, so that it will rest on contiguous teeth and
thus increase the power of resistance.
Fig. 644.
,. .vjiai'
Talbot's spring with bands.
Fig. 644 shows Dr. Talbot's coiled spring, with one end inserted in
a small socket soldered to an anchor band on a molar and the other in
a socket on a band on the lateral. If the bands are thickened on one
Fig. 645.
Plate and coil spring for moving canine.
side, holes may be punched for the reception of the ends of the spring.
Piano wire may be anchored in a plate so as to force a tooth outward.
(See Fig. 634.)
In some cases the lower incisors impinge so closely upon the necks
of the upper as to leave no room for appliances unless the bite is
opened, which is seldom necessary.
