Page 156 - My FlipBook

144 MECHANICAL DENTISTRY AND METALLURGY.
adjusted to exert pressure upon the lingual surfaces of the
anchor bands, as in Fig's. loo and loi. Attach on each
side in the manner following: unite two short tubes at right
angles, R and D ; slip the longer one over the end of the
screw of the clamp band D; bend the end of the lever
sharply at right angles and engage it with the short tube.
Any desired degree of force may be easily gained with this
simple method of reinforcement.
Another and very excellent method of spreading the arch
is that devised by Dr. C. Heydenhauss.* The doctor's
method as he described it to the author consists first, of
capping the teeth on both sides of the mouth, from the

Fig. 102.

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cuspids back to the second molars, with continuous shell-
crowns. These crowns are constructed of one continuous
piece of gold plate, 22-carat. The cuspid teeth, however,
if they are to be forced outward, only need covering on the
palatine surface. This is all clearly shown in Fig. 102.
After the crowns are well fitted and finished, two platinized
gold bars are soldered to their palatal surface and shaped
according to the form of the palatine vault. To one side
a heavy screw-bar is soldered, while to the other a short
hollow tube, to receive the free end of the screw-bar, is
* Dentist to the Court of H. R. M., the Grand Dnkc of Sachsen-
Weimar.