audionomer

Audionomer refers to a class of dental materials historically described as a resin-containing, fluoride-releasing cement used for luting restorations and as a base or liner. The term originated from early formulations that blended glass ionomer cement chemistry with resin components to improve handling, aesthetics, and early strength while maintaining fluoride release. In contemporary terminology, these materials are often described as resin-modified glass ionomer cements or related polyacid-modified resin composites, with audionomer usage appearing mainly in older or mixed-practice literature.

Composition and mechanism

Audionomers typically combine fluoroaluminosilicate glass with an acidic liquid containing polycarboxylic acids, and may include resin monomers and cross-linking systems for curing. The resin component allows light- or dual-curing, enhancing esthetics and early strength, while the inorganic glass portion continues to release fluoride and provide chemical bonding to tooth structure. The result is a material intended to bond chemically to dentin and enamel, seal the interface, and resist dissolution in the oral environment.

Indications and handling

These materials have been used for luting crowns, buildups, inlays and onlays, as liners, or bases in various restorations. They offer fluoride release, somewhat improved aesthetics, and simpler application compared with conventional glass ionomer cements. Handling characteristics can vary by formulation and curing mode; moisture control and correct isolation are important for reliable setting and adhesion.

Advantages and limitations

Audionomers provide chemical adhesion to tooth structure and ongoing fluoride release, which can aid in caries prevention. Compared with full resin composites, wear resistance may be lower in some formulations, and strength development can depend on curing and layering. In modern practice, the terminology has largely shifted to resin-modified glass ionomer cements or compomers, with audionomer usage less common but still encountered in historical or catalog discussions.