Impregnation of ground, acid etched dentin in vivo, using five commercial resins

Resin impregnation of dentin was studied in vivo in 64 pairs of contralateral dentin surfaces. One of the surfaces in each pair was randomly selected to be impregnated with Concise Enamel Bond, the other with one of four commercial resins; namely Concise White Sealant, Clearfil Bonding Agent, Estilux Glaze and Uvio Seal. Before impregnation, the dentin surface was ground flat with a flat fissure bur, etched for 5 seconds with Concise Etching Liquid and compressed air desiccated for 15 seconds holding the compressed air near and parallel to the surface. A bulk of composite material was added to facilitate lateral removal of the resin. Enamel and peritubular dentin were removed with acid after extraction to enable the separation of the resin from the softened dentin. A withinpair analysis of the inner resin surfaces was conducted, based on micrographs taken in the scanning electron microscope (SEM). A good and equivalent impregnation of the dentinal tubules was obtained with all the materials except Uvio Seal. Inadequate or no impregnation at all occurred only in areas near the pulp or close to the DE-junction. Short tags, often with concave endings, were constantly obtained with Uvio Seal.