smear layer

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A thin layer of organic and inorganic debris compacted onto the dentinal or enamel surface of a cavity which has undergone instrumentation. It can be removed with a conditioner or by means of the acid-etch technique. Its presence can influence the adhesion of a bonded restoration. In endodontic therapy it may be removed with citric acid and sodium hypochlorite or ethylene diamine tetraacetic acid (EDTA), a chelating agent, along with sodium hypochlorite to dissolve the organic portion.

Subjects: Dentistry.

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