Page 156 - My FlipBook

152 OPERATIVE DENTISTRY

Fig. 85. Fig. 86.
Fig. 85.—A small Class Three cavity, labial aiiproach, properly prepared for a silicate filling.
Fig. 86.—A small Class Three cavity, lingual approach, properly prepared for a silicate
filling.

Fig. 87. Fig. 88.
Fig. 87.—A large Class Three cavity, labial approach, properly prepared for a silicate filling.
Note the irregular outline on the labial. This is not objectionable, for many times an ir-
regular outline hides a slight deviation from the proper color.
Fig. 88.—A large Class Three cavity, lingual approach, properly prepared for a silicate
filling. Note the fact that this cavity has two axial walls. This is a good form of preparation
in vital cases.