Hybrid Porous Materials for Dental Applications

Abstract

New hybrid polymer-ceramic obturation materials were developed using synthetic hydroxyapatite, two different types of ceramic particles, and a polymer with a high agglutination capacity, high abrasion resistance, and good adhesion to the dentin. Silica nano-particles of 16 nm and alumina micro-particles of 3.2 μm were used: this difference in sizes allows a better packing of the particles into the resin rendering in an improvement in the mechanical and abrasion properties. The resin reacts with the dentin and the ceramic particles improving the adhesion with the substrate and reducing the micro-filtration in the interface dentin-obturation material. Additionally, to protect the obturated dental piece again staining, a transparent and glossy dental coating with a high scratching resistance was also designed.