Efficacy of Dentin Bonding to Cervical Defects.

  • TANI Chihiro
    Department of the Operative Dentistry Showa University School of Dentistry
  • ITOH Kazuo
    Department of the Operative Dentistry Showa University School of Dentistry
  • HISAMITSU Hisashi
    Department of the Operative Dentistry Showa University School of Dentistry
  • WAKUMOTO Sadao
    Department of the Operative Dentistry Showa University School of Dentistry

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Abstract

The bonding efficacy of sclerotic dentin was determined by measuring the polymerization contraction gap width of a commercial light-activated resin composite in a cervical defect and by measuring the micro-Vicker's hardness at the dentin adhesive surface; morphological characteristics were observed using a scanning electron microscope in extracted human incisors and premolars. Contraction gap formation was completely prevented when the cavity wall was primed with 35vol% glyceryl mono-methacrylate solution after 0.5mol/L EDTA conditioning. The contraction gap width was significantly decreased when the resin composite was filled into the sclerotic dentin cavity even when priming was omitted. These results suggest that the sclerotic dentin, which is frequently observed in cervical defects, should be preserved as a substrate because it exhibits an effect of dentin priming and is suitable for bonding.

Journal

  • Dental Materials Journal

    Dental Materials Journal 20 (4), 359-368, 2001

    The Japanese Society for Dental Materials and Devices

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