Page 708 - My FlipBook

706 ORTHODONTIA AS AN OPERATIVE PROCEDURE.

ends as shown in Fijj^. G.30, a, bend one over the other, as in B,
pineh them tightly together, so as to hohl while soldering. Grasp the
band with the pliers as shown in Fig. Gol, and ajiply solder and
heat to the inside of the joint. The pliers will ])roteet the tnbe (»r

Fig. 630.

A !lf B
A, Baud fitted; D, ready fur soldering.

wire from unsoldering. The surplus ends can then be cut away, as in
making a plain band. E, in Fig. 629, shows two open bands soldered
to a long tube for making a double anchorage appliance, such as
shown in Fig. 730. D has a flat tube, which may be used as in Fig.

Fig. 631.

Soldering joint in open band.
739. F will make a retainer, like Fig. 653 or 677, while G and H

can be bent into hooks for various purposes.
The writer finds these " partly-made appliances " a great saving of
time, as a great variety of complete appliances can be made from them
while the patient is in the chair.
Figs. 745 and 746 show how an expander can be made in a similar
manner.
Force.— ^^ Constant Force."—That exerted by compressed rnl)l)cr

or a spring of clasp gold or piano wire.
" Intermittent Force."—That exerted by a scrcAV, wliich allows
periods of rest after each application ; also that exerted by compressed
wood or twisted ligatures of silk or linen.