background: the purpose of this study was to evaluate the influence of three different luting protocols on shear bond strength of computer aided design/computer aided manufacturing (cad/cam) resin nanoceramic (rnc) material to dentin. materials and methods: in this in vitro study, 30 disks were milled from rnc blocks (lava ultimate/3m espe) with cad/cam technology. the disks were subsequently c...

The study of diamond surfaces is traditionally undertaken in geology and materials science. As a sample material, two natural crystals type Ia were selected, their luminescence nitrogen state was characterized. In order to etch the surface catalytic hydrogenation performed using Fe particles as an etchant. Micromorphology investigated by scanning electron laser confocal microscopy. It demonstra...

Pit and fissure sealants are safe effective preventive measures for reducing the risk of tooth decay in pediatric patients. The procedure applying is a relatively quick non-invasive process that typically involves preparation, isolation, etchant application. They used on occlusal surfaces molars premolars, which have deep grooves fissures difficult to clean. Sealants mostly applied permanent ch...

When a finite volume of an etching solution comes in contact with a disordered solid, a complex dynamics of the solid-solution interface develops. Since only the weak parts are corroded, the solid surface hardens progressively. If the etchant is consumed in the chemical reaction, the corrosion dynamics slows down and stops spontaneously leaving a fractal solid surface, which reveals the latent ...