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Effect of a New Salivary Contaminant Removal Method on Bond Strength

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Technical Report

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Uniformed Services University of the Health Sciences Bethesda United States

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Intra-oral try-in procedures of etched glass-ceramic restorations frequently resultin salivary contamination which may decrease the bond strength of the resin cement. Numerous laboratory studies have concluded that the application of 37 phosphoric acid is an effective way to remove salivary contaminants. Ivoclean, a new product from Ivoclar Vivadent, offers an alternative to phosphoric-acid treatment. Objective The purpose of this study was to evaluate the effect of various salivary-contaminant removal methods on the shear bond strength of resin cement to hydrofluoric-acid HF etched ceramic. Methods One hundred fifty lithium disilicate blocks e.max CAD, Ivoclar were sectioned using a linear precision saw Buehler into block wafers, crystallized in a ceramic oven Programat, Ivoclar, and mounted in plastic pipe using dental stone. Specimens n15 were divided into ten groups according to the differences in ceramic preparation and cleaning procedures. The surface of the ceramic was treated with various combinations of 6 hydrofluoric acid VersaLink, Sultan, silane VersaLink, 37 phosphoric acid, or Ivoclean. Resin cement NX3, Kerr was inserted into a mold Ultradent to a height of 3mm and light cured. Specimens were stored for 24 hours in 37 degrees Celsius distilled water and then tested in shear in a universal testing machine Instron.

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  • Medicine and Medical Research

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