Tooth discoloration induced by dental materials

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Abstract

Tooth discoloration after endodontic treatment is frequently attributed to drugs and filling materials. In this in vitro study the staining potential of various dental materials was investigated by means of a visual method to determine tooth color. Extracted human premolars were prepared, and the following materials were introduced into the pulp cavities: Cavit, Durelon, Dycal, Fletcher's cement, IRM, AH26-silver free, gutta-percha, Duo Percha, Fuji ionomer, and zinc phosphate cement. Before the materials were applied, the original tooth color was assessed on the external buccal tooth surfaces. Further color determinations were undertaken at regular intervals for 6 months after the materials were introduced. Durelon, Fuji ionomer, Fletcher's cement, and zinc phosphate cement did not induce measurable tooth discoloration. Cavit, Dycal, gutta-percha, and IRM caused a mild stain. For the teeth filled with AH26-silver free and Duo Percha, a moderate discoloration was recorded.

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