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24 OPERATIVE DENTISTRY
placed toAvard, and running in the same plane as, the gingivae.
Both gingival and sub-pulpal walls may be present in cases of
palp removal in mesio-occlusal, disto-occlusal, and mesio-disto-oc-
Fig. 5."—Class One cavities filled.
6.
Fig. —Class Two cavity filled.
clusal cavities when each is on a different level and the individuality
of each wall is retained.
The inside walls of a cavity are those placed toward the pulp or
root of a tooth.
