Page 834 - My FlipBook

832 THE DEVELOPMENT OF ESTHETIC FACIAL CONTOURS.

The same is true of the lower, when there is reason to believe
there will be a disproportionate over-development of the lower dental
arch.
In the ordinary course of eruption the development and eruption of
the permanent canines are doubtless more influential than those of other
teeth in emphasizing an anterior protrusion of the central features of
the physiognomy.
In the course of their eruption they are obliged to crowd into align-
ment alone; the mesial surfaces of the roots and crowns of the first

Fk;. 888. Fig.

bicuspids—which at this time represent the immovable bases of the
arch—with the result that the incisive and intermaxillary portion of
the arch is forced forward to a more pronounced position. This move-
ment has been shown to be not impossible or difficult of attainment by
artificial force, even much later in life.
With the first bicuspids and deciduous canines removed sufficiently
early there are numberless instances when the arch, anterior to the
second bicuspids, would be diminished the
Fig. 890.
width of a bicuspid, without resort to arti-
ficial means.
By the exertion of a slight traction force
from an occipital base of anchorage the
sockets of the temporary canines will be
closed by the permanent laterals, and the
permanent canines in the course of their
eruption will be deflected into the alveoli
of the extracted bicuspids.
Figs. 888 and 889 represent one case out
of many under treatment by this method,
though not all by the occipital method.
Fig. 890 shows the position of the teeth after about two months