For bonding resin-based materials to enamel and dentin:
1. Tooth preparation:
Apply Primacid (#1) for 10 seconds to tooth surfaces to be restored, using a gentle brushing action with a microbrush, and rinse thoroughly.
Remove bulk water using dry cotton pledgets or suction, leaving the surface slightly damp.
Note – surface does not have to be be perfectly dry.
2. Priming surfaces:
Apply 2 coats of Engineered Primer (#2) to the surfaces to be restored using a microbrush, allowing the Primer to flow from the microbrush to the tooth surface.
Keeping an air syringe about 6 inches from the surface, apply a gentle stream of air to the primed surfaces for 10 seconds to evaporate residual solvent. Do not “blast” the surface with air.
Note: The surface should have a shiny appearance after this last step. If not observed, apply another coat and repeat brief exposure of surface to a stream of air.
3. Apply resin:
Using a new disposable Microbrush, apply a thin layer of Interfacial Resin (#3) to the surface. Use a dry microbrush to “sponge” up excess resin. Wait 15 seconds to allow the resin to mix with the Primer and then light cure (time is dependent on curing light used).
Note 1: Remove pooled resin by using a new applicator and “sponging up” excess resin.
Note 2: Do not apply a high power LED or arc light directly over the surface when curing the resin. Rather, start from a distance that is 3-4 inches away, and come down onto the surface slowly.
Apply a second thin layer of Interfacial Resin using the residual resin in the applicator first used.
Note: Do not cure the second layer after placement. Instead, place the restorative material in a thin layer over the second coat of resin – it will cure with the composite.