Cavity varnish is
applied before base material but after cavity liner.
applied after cavity liner but before base material.
always used with composite resin materials.
never used with base material.
applied after cavity liner but before base material.
Rationale: applied after cavity liner but before base material-cavity varnish is applied in two thin coats to seal dentin tubules and reduce thermal sensitivity. It should be placed after a cavity liner to avoid sensitivity. It can be used with zinc phosphate or zinc oxide eugenol base materials but not with resin due to the incompatibility.
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