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G8 OPERATIVE DENTISTRY
bloAver, followed Avith a thorough brushing Avith a ball of cotton
and more air blasts. The filling should be immediately placed.
Large Proximal Cavities in Non-Vital Teeth.
In the management of this class of cavities, cutting for resistance
A B
Fig. 29.—Mesio-occluso-distal (M.O.D.) cavities in molar and bicuspid, vital teeth. Note
that the occlusal portion of the cavities does not show any retentive form. It is not necessary
to undercut these walls as there is ample retention in other parts of the cavity.
A B
Fig. 30.—Mesio-occluso-distal fillings. Cavities shown in Fig. 29.
to stress reaches the maximum and outline is many times materially
extended for this purpose alone.
Outline Form, With Molars. All decay and softened dentine is
removed. Often this will leave standing an entire cusp of un-
