Author:Site Editor Publish Time: 27-07-2017 Origin:Site
The zirconia surface treatment method is divided into mechanical method and chemical method. Mechanical treatment refers to the physical method of coarsening the bonding surface, increase the bonding surface area and mechanical fitting force; chemical means that by using some chemical reagents to change the nature of zirconium surface, enhance adhesion. Here we introduce the zirconia ceramic mechanical surface treatment methods.
Mechanical grinding is an all-ceramic crown to try to wear a process often. Some scholars believe that the clinical grinding process will form a residual tensile stress, accelerated restoration of aging, thus affecting the life of the restoration. Polishing reduces the stability of the ceramic, while polishing, glazing has the effect of suppressing the aging of the ceramic.
Alumina blasting technology
Alumina particles sandblasting can increase the roughness and cleanliness of the surface of zirconia ceramics, thereby increasing the mechanical retention between the ceramic and dental bodies, and with the 10-methacryloyloxydecyl phosphate (MDP ) Phosphoric acid monomer resin bonding material to produce chemical bonding, increase the adhesion between zirconia and the teeth.
Laser etching technology
Laser etching refers to the high-energy laser irradiation of zirconia ceramic to produce the surface of melting and re-quenching, resulting in the dissemination of small pits to increase the mechanical lock of zirconia and resin. Commonly used in the laser are Er: YAG laser, Nd: YAG laser and carbon dioxide (CO2) laser.
Selective osmotic etching technique
Is a new increase in zirconium surface roughness technology, the principle is in the zirconium surface coated with a layer of special silicate glass, and then heated to 750 ℃ above the glass coating melting, and along the zirconia crystal Diffusion in the boundary region promotes the sliding and splitting of the grains on the surface of zirconia. And then the use of hydrofluoric acid etching, the formation of intergranular porous three-dimensional network structure, which helps the adhesive into the gap to form a mechanical chimeric effect, increase porcelain - resin bonding strength.
NobelBond surface treatment
NobelBond is a new ceramic surface treatment technology, which has been used for bonding zirconia on the surface in recent years. The principle is to finish a pre-sintered or fully sintered zirconia scaffold surface with a slurry containing zirconia powder and stomatal form, which is sintered and the stomatal composition decomposes to form porosity on the zirconium surface.