PMID: 11317393Apr 25, 2001Paper

Ability of adhesive systems to seal dentin surfaces: an in vitro study

The Journal of Adhesive Dentistry
S BouillaguetH Sano

Abstract

The objective of this study was to evaluate the ability of three adhesive systems to seal dentin by measuring the permeability of dentin before and after bonding procedures. Thirty-six flat dentin surfaces were prepared from human extracted teeth and connected to a fluid-filled system for permeability measurements. The hydraulic conductance of the flat occlusal surface of dentin was measured by the filtration technique, before and after application of ScotchBond MP Plus, Prime & Bond 2.0, and All-Bond 2. Bonding procedures were followed by P-50 resin composite application. The specimens were then perfused with silver nitrate to permit morphologic localization of microleakage pathways using SEM. The results showed that the best dentin seal was produced by All-Bond 2, followed by Prime & Bond 2.0, and ScotchBond MP Plus. However, none of the three bonding systems tested was able to totally prevent the passage of fluid across the dentin in every specimen. When observed with SEM, each adhesive system exhibited different patterns of leakage. The inability of all three materials to create a perfect seal in vitro raises concerns about the ability of these adhesive systems to provide completely sealed restorations in vivo. However, bec...Continue Reading

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