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PIT AND FISSURE CAVITIES 53
When the Pulp is Exposed or nearly so the operator will pro-
ceed to pulp treatment, of either devitalization or conservation,
as the case demands. This step completed outline form is again
taken up and fissures and sulcate grooves included in the cavity
outline.
Resistance and Retention Forms. As to resistance, we have only
to consider the probable stress to be sustained by the filling as
a whole and of the margins in their various localities. This will
ihvolve a study of each case in hand, as to occlusion and articula-
tion, as well as to habits of the patient in mastication. The prob-
lem of concave pulpal wall is here met in its most exasperating
A B
Fig. 19.— Large Class One cavities prepared.
form. Many times if the operator were to take the lower levels
of the pulpal wall and attempt to flatten and carry this wall lat-
erally until it could be made to meet surrounding walls at different
angles, the recessional tracts of the pulp would be crossed and ex-
posure of that organ result.
The Flattening of the Pulpal Walls Avoided. (See Fig. 19.)
This lateral cutting to flatten pulpal walls may be avoided in two
ways
First. The operator may estnblish a level higher up on the lat-
eral Avails for the creation of the base line angles, resulting in
steps. These steps should be established in places most remote
PIT AND FISSURE CAVITIES 53
When the Pulp is Exposed or nearly so the operator will pro-
ceed to pulp treatment, of either devitalization or conservation,
as the case demands. This step completed outline form is again
taken up and fissures and sulcate grooves included in the cavity
outline.
Resistance and Retention Forms. As to resistance, we have only
to consider the probable stress to be sustained by the filling as
a whole and of the margins in their various localities. This will
ihvolve a study of each case in hand, as to occlusion and articula-
tion, as well as to habits of the patient in mastication. The prob-
lem of concave pulpal wall is here met in its most exasperating
A B
Fig. 19.— Large Class One cavities prepared.
form. Many times if the operator were to take the lower levels
of the pulpal wall and attempt to flatten and carry this wall lat-
erally until it could be made to meet surrounding walls at different
angles, the recessional tracts of the pulp would be crossed and ex-
posure of that organ result.
The Flattening of the Pulpal Walls Avoided. (See Fig. 19.)
This lateral cutting to flatten pulpal walls may be avoided in two
ways
First. The operator may estnblish a level higher up on the lat-
eral Avails for the creation of the base line angles, resulting in
steps. These steps should be established in places most remote
