Table 1: Experimental design.

TreatmentsDentinal 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.