Page 158 - My FlipBook

146 MECHANICAL DENTISTRY AND METALLURGY.
The placing" of this wire requires some skill, but is, how-
ever, easily understood. To prevent oxidation the wire can
be gold-plated. The wire should be taken out every two or
three days and slightly expanded, then replaced. This ap-
pliance is shown in Figs. 104 and 105.

Fig. 1 04.

Protrusion of the Upper Jaw.—One of the simplest and
most efficient methods of reduction in superior protrusion
is that given by Dr. Angle. It consists of anchor-bands
(D, Fig. 106) for the molar teeth, with long tubes soldered

to their buccal surfaces to receive the wire bow-spring,
which rests in front in notched projections upon bands
cemented to the central incisors. At the center of the bow-
spring is soldered a short tube, having upon its labial sur-