Page 335 - My FlipBook

Fig. ir.T

Fig. IGS. Fig. IGO.

Figs. 165-169. A series for the illustration of cavity preparation in upper molars.
Fig. 165. An upper molar with a beginning- rlecav in the mesial surface. The enamel rods
have begun to fall out over a small area only ; but little burrowing in the dentin has occurred.
The tooth is a heavy, strong, short crowned molar. The person heavily muscled and the bite strong.
Fig. 106. A broad and rather flat, but well marked occlusal surface ; a fonn that gives suffi-
cient space for even a broader occlusal step than seems required for the case, without danger to
the recessional lines of the pulpal horns.
Fig. 167. The prepared cavitj-, mesial view, showing the depth of the step, which is intended
to give a strong anchorage, and the relation of the gingival wall to the gingival line.
Fig. 16S. The occlusal view of the prepared cavity, showing the mosio-distal depth of the
proximal portion. It is not deep.
Fig. 169. The finished filling, which shows best the wide outward inclination of the mesial
portion of the buccal and lingual walls.