Zinc oxide eugenol is used as
a liner.
a base under composite restorations.
a permanent cements.
an insulating base material.
an insulating base material.
Rationale: an insulating base material-zinc oxide eugenol can be used under amalgam restorations as an insulating base material. Because of the eugenol (clove oil) content, it is not compatible with composite materials. It is not strong enough to be used as a permanent cement or thin enough to be used as a liner.
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