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Dental materials designed to roughen the surface of the tooth enamel (i.e., etching) to increase the adhesion of dental restorative materials. These dental materials consist of liquid acid solutions (30 to 50 percent of phosphoric acid) or gels that increase the viscosity of fillings; the etching material is usually placed in the tooth prior to using dental composites, fissures, and cavity sealants. Dental etching materials are typically supplied packed in syringe-like devices; they are used in dentists\' offices.
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