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Experimental design.
| Treatments | Dentinal permeability (Lp) evaluations |
|---|---|
| Smear layer (400 grit, wet sanding for 30 s) | Minimum Lp |
| 37% phosphoric acid (application for 30 s) | Maximum Lp (Lp 100%) |
| Product (application for 4 min) | Lp reduction |
| Citric acid solution 0.02 M pH 2.5 at 37-38°C (exposure for 1 min) | Lp variation |
Lp: Hydraulic conductance.
