Carter describes an example of third dentition. Lison
makes a curious observation of a sixth dentition.
Edentulousness.--We have already noticed the association of
congenital alopecia with edentulousness, but, strange to say,
Magitot has remarked that "l'homme-chien," was the subject of
defective dentition. Borellus found atrophy of all the dental
follicles in a woman of sixty who never had possessed any teeth.
Fanton-Touvet saw a boy of nine who had never had teeth, and Fox
a woman who had but four in both jaws; Tomes cites several
similar instances. Hutchinson speaks of a child who was perfectly
edentulous as to temporary teeth, but who had the permanent teeth
duly and fully erupted. Guilford describes a man of forty-eight,
who was edentulous from birth, who also totally lacked the sense
of smell, and was almost without the sense of taste; the surface
of his body was covered with fine hairs and he had never had
visible perspiration. This is probably the same case quoted in
the foregoing paragraph in regard to the anomalies of hair. Otto,
quoted by Sedgwick, speaks of two brothers who were both totally
edentulous. It might be interesting in this connection to note
that Oudet found in a fetus at term all the dental follicles in a
process of suppuration, leaving no doubt that, if the fetus had
been born viable, it would have been edentulous.
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