Novel Organofunctional Silane Coatings on Silica-Coated Ti

J.P. Matinlinna, J.K.H. Tsoi
The University of Hong Kong, HK

Keywords: titanium, silane, silica-coating, AFM, XPS


This in vitro study characterizes a developed novel silane system method to produce coatings on Ti. Hydrophobic coatings are needed in prosthetic dentistry to promote durable adhesion between luting resin cements and coated Ti surfaces. Silane blends may contribute to significantly higher bond strengths than functional silanes alone. We have previously shown that the novel silane system blend with 1.0 vol% of 3-acryloxypropyltrimethoxysilane + 0.3 vol% bis-1,2-(triethoxysilyl)ethane produced in vitro the highest shear bond strength after artificial aging. The silane primers were prepared of 3-acryloxypropyltrimethoxysilane and bis-1,2-(triethoxysilyl)ethane (in four different concentrations) and diluted in acidified ethanol-water solvent. The contact angles, surface free energies and critical surface tensions were assessed and the chemical compositions of treated surfaces were analyzed using X-photoelectron spectroscopy. A commercially available preactivated dental silane were used as the controls. Novel silane + silica coatings were successfully developed and optimized. We may conclude that: 1. the novel silane system was developed and optimized successfully; 2) The surface characterization showed nearly full coverage of silane coatings on titanium surface without compromising the surface roughness. 3) Such hydrophobic coatings may have huge potential for durable restoration bonding i dentistry.