Glass ionomer is a clear, translucent dental filling material used primarily in dentistry for adhesion to tooth enamel and lapping cement, with other applications such as for anchoring brackets for bridges and veneers. Glass-ionomers are made by reacting between a solution of polyacrylamide and a binder. The resulting material is nearly identical to the active ingredient found in the mineral quartz. There are a variety of glass ionomer products available. They can be used for filling, bonding, pressing, and bonding as well as whitening, curing, restoring, and covering crowns.
Most glass ionomer products are clear, but there are a few resin-based sealants available. Resin-based sealants come in two forms: soluble and insoluble. Soluble glass ionomer sealants are water or oil-soluble. To apply, brush resin-based sealants on to the teeth and leave to dry. Brush again after an hour or two to make sure the resin is fully absorbed into the enamel. Resin-based sealants are best used on severely discolored or stained teeth, as plaque may build up or even settle on areas not covered by the resin-based sealant.
Glass Ionomer Cement
Ionic resin-based sealants are often used for restorations and fillings on teeth that have been damaged by chipping, cracking, or acids. These types of restorations are most appropriate for low-visibility situations, such as on dentures or bonded slips. Ionic-cure restorations, which include crown cap and composite restorations, are more suitable for patients’ teeth than are acrylic-based sealants. Ionic-cure sealants do not bond to tooth-colored materials. However, they can be used on colored materials if mixed with clear glass ionomer solutions.
For applications that require adhesion to a surface, the most commonly used type of glass ionomer is the oil-based (ethylene-butyl) glass ionomer. It is the strongest form and bonds readily with other materials. Because of its great strength and compatibility with many solvents, glass ionomers are often used as binding agents for adhesive coatings, gaskets, rubber and plastic parts, and many other applications. There is also the glass ionomer tetra-acids, which provide a more rigid bond than their solvent-based equivalents. Glass tetra-acids are used for applications requiring high-impact resistance, since they form a nearly impermeable layer against impact.
Glass gics have the ability to restore veneer, chips, and cracks in teeth and surrounding areas. Since it can strengthen cement, this additive is often used as an adhesive to repair damaged teeth during the filling process. Pics can also be used as teeth whiteners, making them appropriate for use on sensitive, soft, or healing teeth. They can also remove stains from stained glassware, as well as dark pigments and residues from shellfish shells. Many glass companies make it a practice to carefully test products before using them on customers, to make sure there will not be any adverse reactions due to glass particles. For example, some companies place glass electrodes on patients’ foreheads to test color reaction before applying them to their teeth.
Glass ionomers can be used as tooth coloured fillings in a number of applications. They can be used as partial dentures in filling cavities, since they can fill up to two-thirds of the space between teeth. They are also good in filling crowns and chips. The only disadvantage of these composite fillings is that the procedure does take time, and they cannot be applied to teeth that are badly decayed. Porcelain composite fillings are often used to correct dental crowns and chips, since they are less expensive and tend to last longer than other methods of tooth filling.