Giraldes
mentions the absence of teeth in an infant of sixteen months.
Bronzet describes a child of twelve, with only half its teeth, in
whom the alveolar borders receded as in age. Baumes remarks that
he had seen a man who never had any teeth.
The anomalies of excessive dentition are of several varieties,
those of simple supernumerary teeth, double or triple rows, and
those in anomalous positions. Ibbetson saw a child with five
incisors in the inferior maxillary bone, and Fanton-Touvet
describes a young lady who possessed five large incisors of the
first dentition in the superior maxilla. Rayer notes a case of
dentition of four canines, which first made their appearance
after pain for eight days in the jaws and associated with
convulsions. In an Ethiopian Soemmering has seen one molar too
many on each side and in each jaw. Ploucquet and Tesmer have seen
five incisors and Fanchard six. Many persons have the
supernumerary teeth parallel with their neighbors, anteriorly or
posteriorly. Costa reports a case in which there were five canine
teeth in the upper jaw, two placed laterally on either side, and
one on the right side behind the other two. The patient was
twenty-six years of age, well formed and in good health.
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