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UPPER DENTAL AND MAXILLARY PROTRUSIONS. 813
"jumping the bite" in bringing segments 3 and 4 into more perfect
harmony with segments 1 and 2 ; yet not to be compared with that per-
fection of symmetrical contour shown by Fig. 851, where the chin and
lower lip are permitted to remain in their original harmonious position
while the end of the nose and upper lip are retruded into harmony with
the whole.
The three faces have been made exactly alike with the exception
as shown by the cross lines—of certain mechanical movements of the
profile outlines in the changeable area. In Fig. 850 the outlines of
segments 3 and 4 are forced farther forward, and in Fig. 851 segments
Fig. 851. Fig. 852.
] and 2 are carried back as they w'ould be by a retruding apparatus
attached to the teeth.
In comparing Figs. 849 and 851 the difference in esthetic effect is
quite striking, and it is one also which would seem to be hardly possible
Avith so little change in the outlines of a comparatively small area. By
cutting a piece of black paper to the exact outlines of Fig. 851 and
placing it upon Fig. 849 the real and only ditlerence in the two figures
can be plainly seen—as in Fig. 852.
AVhen such a change is produced in the features of a human face the
difference is greatly enhanced because of the harmonious perfection of
other contours not shoMU by the figures.
It is a noteworthy fact that a very little change in the peripheral
shape or position of certain bones of the face on which the features are
dependent for their character and form—a change so trifling that it could
UPPER DENTAL AND MAXILLARY PROTRUSIONS. 813
"jumping the bite" in bringing segments 3 and 4 into more perfect
harmony with segments 1 and 2 ; yet not to be compared with that per-
fection of symmetrical contour shown by Fig. 851, where the chin and
lower lip are permitted to remain in their original harmonious position
while the end of the nose and upper lip are retruded into harmony with
the whole.
The three faces have been made exactly alike with the exception
as shown by the cross lines—of certain mechanical movements of the
profile outlines in the changeable area. In Fig. 850 the outlines of
segments 3 and 4 are forced farther forward, and in Fig. 851 segments
Fig. 851. Fig. 852.
] and 2 are carried back as they w'ould be by a retruding apparatus
attached to the teeth.
In comparing Figs. 849 and 851 the difference in esthetic effect is
quite striking, and it is one also which would seem to be hardly possible
Avith so little change in the outlines of a comparatively small area. By
cutting a piece of black paper to the exact outlines of Fig. 851 and
placing it upon Fig. 849 the real and only ditlerence in the two figures
can be plainly seen—as in Fig. 852.
AVhen such a change is produced in the features of a human face the
difference is greatly enhanced because of the harmonious perfection of
other contours not shoMU by the figures.
It is a noteworthy fact that a very little change in the peripheral
shape or position of certain bones of the face on which the features are
dependent for their character and form—a change so trifling that it could
