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Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Jean-François Roulet

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

Fall 2000
Volume 2 , Issue 3



Pages: 201-208
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Ability of Adhesive Systems to Seal Dentin Surfaces: An In Vitro Study.

Bouillaguet, Serge; Duroux, Benoit; Ciucchi, Bernard; Sano, Hidehiko

Purpose: The objective of this study was 10 evaluate the ability of three adhesive systems to seal dentin by measuring the permeability of dentin before and after bonding procedures. Materials and Methods: 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 nitration 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. Results: 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 m every specimen. When observed with SEM, each adhesive system exhibited different patterns of leakage. Conclusion: 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, Because [he current study applied pressure 3 to 6 times higher than physiologically normal, it is likely that the leakage represents a worst-case scenario.

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