At present, the commonly used ceramic adhesives in clinical practice can be Machinable Glass Ceramic Block mainly divided into 4 categories: resin adhesives, glass ionomer adhesives, resin plus glass ionomer adhesives, and phosphate adhesives. Among them, resin adhesives mainly rely on chemical adhesion and mechanical fitting, glass ionomer adhesives are physical and mechanical bonding, and phosphate adhesives mainly rely on mechanical fitting and retention. Among them, resin-based adhesives dominate.
Ceramic surface treatment can improve the bonding force with resin. Common ceramic surface treatment is mainly divided into mechanical method and chemical method. Generally speaking, sandblasting, etching technology and silane coupling agent are the most common methods. However, since zirconia ceramics are polycrystalline ceramics without a glass matrix, the acid etching effect is limited. ingredients to improve its mechanical locking and Machinable Glass Ceramic Plate chemical bonding properties.
(1) Sandblasting: Grinding or sandblasting will make the surface change from four-direction monoclinic, so that the content of monoclinic zirconia crystals increases sharply. The process in which high-speed moving alumina particles strongly impact the surface of zirconia in order to form a rough and wet bonding surface. A number of experiments have proved that sandblasting with 50μm alumina particles under a pressure of less than 0.25MPa is the most suitable choice, which can improve the strength and durability of the bond between the zirconia all-ceramic and the resin adhesive.
(2) Coupling agent: The firm bonding between the various interfaces is achieved through covalent bonds. At present, there are mainly bases containing 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) Machinable Glass Ceramic Bar components. There are two types of paints and silane primers.
(3) Laser etching: Improve the micro-mechanical properties of the zirconia all-ceramic surface, which is beneficial to form a micro-mechanical connection between the zirconia surface and the resin, and improve the bonding effect of the zirconia all-ceramic.
What surface treatment can zirconia ceramics do?
2022 07/26