Novel approach to improved silanation of zirconia

Objective : The overall goal of this research was to chemically modify the surface of zirconia dental ceramics with a Si x O y seed layer to increase adhesive bonding with commercially available silanes and resin cements.

Materials and methods : Investigation focused on a novel approach to functionalize the zirconia surface with Si x O y that would promote chemical bonding with traditional organo-silanes. Planar test structures were prepared, modified, and analyzed, before and after Si–O modification using X-ray photoelectron spectroscopy (XPS). Varying thicknesses of Si x O y were deposited on ZirCAD blocks and bonded to a similar dimension composite block. Microtensile bars were prepared and subjected to tensile forces, scanning electron microscopy (SEM) was used to analyze fracture surfaces and determine failure mode.

Results : XPS analysis revealed a level of bonded Si x O y to the surface of zirconia. Microtensile bond testing revealed that a thin (2.6 nm) Si x O y modification was similar in bond strength to the porcelain control group. Other groups tested had lower strength values and higher percentages of adhesive failures.

Nov 30, 2017 | Posted by in Dental Materials | Comments Off on Novel approach to improved silanation of zirconia
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