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LARGE PROXIMAL CAVITIES ENDANGERING PULP 67

Finish of Enamel Walls.
The enamel Avails should now be inspected, corrected for com-
plete cleavage and the proper cavo-surface angle established, us-

Fig. 27.—Large Class Two cavities in non-vital teeth restoring part of the occlusal surface for
the protection of weakened walls.

A B
Fig. 28.—Class Two filled. Cavities shown in Fig. i7.

ing for this a keen-edged chisel and a light hand Avith a planing
motion parallel with the external enamel line.
For Toilet of the Cavity use a few blasts of air from the chip