FGP were cleansed with a gauze previously soaked in alcohol 72 ethanol during 15 seconds to remove any grease-contaminated substance which might be present in the posts.
Los PFV se limpiaron con una gasa embebida en alcohol etanol a 72° por 15 seg para retirar cualquier sustancia grasosa de los mismos, se secó y se colocó una capa de silano por 1 min.