The leakage test was carried out in the following fashion: Groups A, B, and C, as well as positive control groups had their root surface covered with paraffin wax, excepting the last three millimeters around the apex.
Los grupos A, B, C y control positivo, se cubrieron con cera parafina sobre su superficie radicular, excepto los 3 últimos milímetros alrededor del ápice.