Page 721 - My FlipBook

LINGUAL ERUPTION. 719

A better method of gaining room is to cement bands on the two
adjacent teeth with tubes on the labial surfaces. In these tubes insert
a Matteson spring, as shown in Fig. 651. As soon as sufficient room
Fici. 650. Fig. 651.

Compressed wood fur making room. ^Jatteson spring applied to bands.
is gained, a straight wire may be inserted in the tubes across the space.
A rubber band stretched over the malposed tooth from this wire will
soon move it into place.
Fig. 652 shows a very satisfactory modification of the above appli-
ance, using intermittent force instead of constant. A screw with two
Fig. 652.

Writer's appliance fur making room and moving touth out.
nuts on it, or one collar and one nut, is inserted in the tubes, and the
nuts screwed against the tubes. If one of the nuts is turned two or
three times a day, the teeth will soon be moved apart. The nuts will
hold the teeth apart while a rubber band or ligature passed over the
screw and the maljwsed tooth will soon draw it forward, or if the rubber
band is applied while the contiguous teeth are being spread apart, the
tooth will move forward as room is made for it.
Retainer.—The l)est retainer for a single tooth moved forward
consists of a Magill baml with a round wire soldered on its labial sur-
face. (See Fig. 653.) A muud wire is better than a flat bar, because