Page 741 - My FlipBook

SEVERAL TEETH IN MALPOSITION. 739

the case. The cut shows the manner of attaching rubber bands by
M'hich teeth may be drawn forward. The bow should be from yg ^^
i"
of an inch in advance of the teeth to be moved, and may be elongated
from time to time by hammering the sides on the beak of an anvil.
By attaching rubber bands or twisted ligatures to the plate, teeth may
be drawn into the arch, as shown in Fig. 712, B. By stretching rubber
bands or twisted ligatures from either the wire or plate to hooks such
as shown in Fig. 712, A, teeth may be rotated. For such purpose it
is in some cases best to solder hooks on both labial and lingual surfaces
of a band, and thus apply force from wire and plate at the same time.
By attaching a rubber band at that part of the wire which emerges
from the plate (Fig. 712), a tooth may be drawn backward along the
ridge. If the wire extends near to the cutting edge, an incisor may be

Fig. 712.

Plate and wire bo'iv lor moving teeth lu all positions
extruded by ligating a rubber band at the neck and extending it to the
bow, or by applying a twisted ligature in the same manner. In some
cases it is necessary to ligate the plate firmly to temporary molars or
bicuspids. This has a wider range of use than any other single appli-
ance, for with it teeth may be moved outward or inward, rotated or
elongated, or the arch may be spread. (See Fig. 712, A, B, C, I).)
It is, however, much less stable and much more uncleanly than are
many other appliances attached directly to the teeth.
The same movements may be made with the bows shown in Fig. 713.
Bands are cemented on one or two teeth on each side of the mouth, pre-
ferably two for stability, in which case the bands should be soldered
together. Tubes are soldered on both buccal and lingual sides of the
bands. In these tubes are inserted wire bows, screw-cut on the ends
and supplied with nuts. One bow extends around the labial and the
other around the lin