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LARGE PROXIMAL CAVITIES ENDANGERING PULP 69
supported enamel and possibly both proximal cusps are thus un-
supported. In such cases a thin-edged carborundum wheel is placed
on the occlusal and this surface ground away for one or tAvo milli-
meters, extending as far toward the central axial line to just be-
Fig. 31. (A) First superior molar, non-vital, restoring the lingual cusps. (S) Second superior
bicuspid, non-vital, restoring the entire occlusal surface.
A B
Fig. 32.—Class Two filled. Cavities shown in Fig. 31.
yond the buccal or lingual groove, or both when both cusps are to
be removed. This grinding process is carried to a greater depth
in the region of the groove, resulting in a step which gives the fill-
ing nil occlusal surface seating.
LARGE PROXIMAL CAVITIES ENDANGERING PULP 69
supported enamel and possibly both proximal cusps are thus un-
supported. In such cases a thin-edged carborundum wheel is placed
on the occlusal and this surface ground away for one or tAvo milli-
meters, extending as far toward the central axial line to just be-
Fig. 31. (A) First superior molar, non-vital, restoring the lingual cusps. (S) Second superior
bicuspid, non-vital, restoring the entire occlusal surface.
A B
Fig. 32.—Class Two filled. Cavities shown in Fig. 31.
yond the buccal or lingual groove, or both when both cusps are to
be removed. This grinding process is carried to a greater depth
in the region of the groove, resulting in a step which gives the fill-
ing nil occlusal surface seating.
