Effects of Calcium Phosphate Precipitation Method on Acid Resistance to Apatite Powder and Bovine Tooth

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  • SUGE Toshiyuki
    Department of Conservative Dentistry, Institute of Health Biosciences, The University of Tokushima Graduate School
  • KAWASAKI Akiko
    Department of Conservative Dentistry, Institute of Health Biosciences, The University of Tokushima Graduate School
  • ISHIKAWA Kunio
    Department of Biomaterials, Faculty of Dental Science, Kyushu University
  • MATSUO Takashi
    Department of Conservative Dentistry, Institute of Health Biosciences, The University of Tokushima Graduate School
  • EBISU Shigeyuki
    Department of Restorative Dentistry and Endodontology, Division of Oral Infections and Disease Control, Osaka University Graduate School of Dentistry

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Abstract

The aims of this study were to evaluate the effects of CPP method on the crystallinity of apatite powder and on the acid resistance of bovine enamel. Crystallinity degrees of apatite powder before and after CPP treatment were measured by powder X-ray diffraction analysis. Polished bovine enamel specimens treated with CPP method or NaF were immersed in a lactic acid solution for up to five days. The demineralized depth of enamel was measured with a surface roughness analyzer. XRD peaks became sharper after the CPP treatment, indicating an increased crystallinity of the apatite powder. The demineralized depth of bovine enamel treated with CPP method was shallower than that of enamel treated with NaF. Results of this study revealed that the CPP method increased the crystallinity of apatite powder and the acid resistance of enamel. Therefore, the CPP method would be useful not only for treating dentin hypersensitivity, but also for the prevention of dental caries.

Journal

  • Dental Materials Journal

    Dental Materials Journal 27 (4), 508-514, 2008

    The Japanese Society for Dental Materials and Devices

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