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  • Title: [Adhesion of sealer cements to dentin with and without smear layer].
    Author: Gettleman BH, Messer HH, ElDeeb ME.
    Journal: Endodoncia; 1991; 9(2):83-91. PubMed ID: 1659858.
    Abstract:
    The influence of a smear layer on the adhesion of sealer cements to dentin was assessed in recently extracted human anterior teeth. A total of 120 samples was tested, 40 per sealer; 20 each with and without the smear layer. The teeth were split longitudinally, and the internal surfaces were ground flat. One-half of each tooth was left with the smear layer intact, while the other half had the smear removed by washing for 3 min with 17% EDTA followed by 5.25% NaOCI. Evidence of the ability to remove the smear layer was verified by scanning electron microscopy. Using a specially designed jig, the sealer was placed into a 4-mm wide x 4 mm deep well which was then set onto the tooth.
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