?:definition
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Cement dental materials, whose main components are polymeric resins, designed to produce a mechanical interlocking effect upon hardening inside the mouth. These cements consist of polymethyl methacrylate, silica powder and plasticizers that are mixed together in a viscous paste immediately before use, setting to a hard mass. Resin composite cements have good esthetics, proper thermal and chemical resistance in the oral environment, mechanical strength, workability and storage stability; they also should be resistant to dissolution in oral fluids, and non-irritating to pulp and gingiva. They are used in dentists\' offices to attach ceramic or resin inlays and onlays, veneers, or metal restorations to teeth, and also can be used as cementing medium of orthodontic appliances (e.g., bands, brackets).
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