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PHYSIOGNOMY AND THE SAVING OF TEETH. 831
With differences in temperament, compare general shape and size of
the eyes, brows, ears, and teeth.
Other features are so subject to change in the processes of natural
growth and development that they cannot be relied upon to furnish
legitimate data. For instance, the nose may change in a few years
of late youthful development from one originally small and short
and over the nasal bones decidedly depressed—to a form different in
every particular.
When neither parent presents the same unsym metrical relations that
promise to prevail in the child, the cause may be a union of the large
teeth of one parent with the small jaws of the other.
When the teeth of the parents are decidedly dissimilar in size, it
may be possible, as before stated, to determine with certainty from
which parent the teeth of the child are inherited, and when the teeth
and jaws of the other parent are small and other features are similar
to those of the child, it indicates a union of undiluted types.
All these things are of the utmost importance in determining the
impropriety of extracting certain teeth to reduce an apparent abnormal
protrusion, which may in time become symmetrical in its relation by
the natural growth of the jaws and other features ; and also the equally
culpable error of saving teeth, or the failure to extract teeth, whose
very presence in the arch obliges Nature to reproduce a parental
deformity, or produce an acquired deformity, by an effort to sustain the
large teeth of one parent in conjunction with the small jaws of the
other.
For a child with an abnormal upper protrusion similar to Figs. 886
and 887, with teeth prominent and crowded in an arch which does not
Fig. 886. Fig. 887.
admit of correcting by a lateral expansion, extract the first bicuspids as
early as possible, even before their eruption is completed, together with
the deciduous canines—imless it be one of those very rare instances
where the first permanent molars cannot be saved.
PHYSIOGNOMY AND THE SAVING OF TEETH. 831
With differences in temperament, compare general shape and size of
the eyes, brows, ears, and teeth.
Other features are so subject to change in the processes of natural
growth and development that they cannot be relied upon to furnish
legitimate data. For instance, the nose may change in a few years
of late youthful development from one originally small and short
and over the nasal bones decidedly depressed—to a form different in
every particular.
When neither parent presents the same unsym metrical relations that
promise to prevail in the child, the cause may be a union of the large
teeth of one parent with the small jaws of the other.
When the teeth of the parents are decidedly dissimilar in size, it
may be possible, as before stated, to determine with certainty from
which parent the teeth of the child are inherited, and when the teeth
and jaws of the other parent are small and other features are similar
to those of the child, it indicates a union of undiluted types.
All these things are of the utmost importance in determining the
impropriety of extracting certain teeth to reduce an apparent abnormal
protrusion, which may in time become symmetrical in its relation by
the natural growth of the jaws and other features ; and also the equally
culpable error of saving teeth, or the failure to extract teeth, whose
very presence in the arch obliges Nature to reproduce a parental
deformity, or produce an acquired deformity, by an effort to sustain the
large teeth of one parent in conjunction with the small jaws of the
other.
For a child with an abnormal upper protrusion similar to Figs. 886
and 887, with teeth prominent and crowded in an arch which does not
Fig. 886. Fig. 887.
admit of correcting by a lateral expansion, extract the first bicuspids as
early as possible, even before their eruption is completed, together with
the deciduous canines—imless it be one of those very rare instances
where the first permanent molars cannot be saved.
