Page 291 - My FlipBook

TEACHING MODELS
259

Fig. 294.—Another view of Dr. Atwater's model and instruments. Typical
cavities of decay are seen, while the instrumentation incident to the preparation of a
cavity on a molar will be noticed.
The various pathological conditions incident to
the formation of a cavity through the process of caries (such as partially affected
dentm, the bacterial zone, leathery decay, brown caries, ptomaines and food debris)
are imitated on these models.'

Fig. 295.—Another view of the model used in the University of Southern California,
Dental Department.