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lilSTOKY OF DENTAL SURGERY 55

ARTIFICIAL TEETH.
Faiiclianl takes up the subjeit of artificial t^uhstitutes, in wliich he enumer-
ate? "luiiiian teeth, the teetli of the walrus, liippopotanius and the oxen, also
the hones of the oxen, horses' and mules' teeth, the teeth of the rhinoceros and
the heart of the oldest and whitest ivorw" TTunian teeth and those of the

Front and side view of a "machine" or full set of teeth, united by means of a spring.

walrus are preferred by him, "because they are covered by enamel and therefore
last longer and hold their color better than all other materials."
He describes the construction of artificial teeth upon remaining roots and
their preparation pivot teeth. Tie filled the root canal with lead and prepared
the foundation for the artificial tooth which was to be placed upon this root;
then lie introduced an awl and formed a liole in the lead that had been