Properties of Dental Adhesives Incorporated with Boehmite Nano-particles

The incorporation of boehmite nano-particles and its effects on the mechanicalproperties and bond strength of an experimental dental adhesive were studied.An adhesive solution containing ethanol, Bis-GMA, TMPTMA, HEMA andphoto-initiator system (camphorquinone and DMAEMA) was prepared. Silanizedboehmite nano-particles were incorporated into the adhesive in different concentrationsof 0, 0.2, 0.5, 1, 2, and 5 weight percentages. The suspensions were ultrasonocated tofacilitate the nano-particle dispersion. Degree of conversion of the adhesive under visiblelight irradiation was determined using FT-IR spectroscopy. Depth of cure, diametraltensile strength, flexural strength, and micro-shear bond strength of the adhesives weremeasured. Scanning electron electron microscopy was utilized to observe the fracturesurface topography.