Archives of Oral Biology
Volume 55, Issue 4 , Pages 300-308, April 2010

Micro-structural integrity of dental enamel subjected to two tooth whitening regimes

  • Reina Tanaka

      Affiliations

    • Department of Oral Biomaterials and Technology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
    • ,
  • Yo Shibata

      Affiliations

    • Department of Oral Biomaterials and Technology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan
    • Corresponding Author InformationCorresponding author. Tel.: +81 3 3784 8178; fax: +81 3 3784 8179.
    • ,
  • Atsufumi Manabe

      Affiliations

    • Division of Aesthetic Dentistry, Showa University School of Dentistry, 2-1-2 Kitasenzoku, Ohta-ku, Tokyo 145-8515, Japan
    • ,
  • Takashi Miyazaki

      Affiliations

    • Department of Oral Biomaterials and Technology, Showa University School of Dentistry, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo 142-8555, Japan

Accepted 28 February 2010.

Abstract 

Colour modification of tooth enamel has proven successful, but it is unclear how various bleaching applications affect micro-structural integrity of the whitened enamel. To investigate the internal structural integrity of human intact tooth enamel with the application of two commonly used whitening regimes (in-office power bleaching with 35% hydrogen peroxide and home bleaching with 10% carbamide peroxide), evaluations were performed on teeth of identical colour classification. After the bleaching applications, the enamel mineral density was quantified and visualised with micro-computed tomography. The micro-structural differences between the whitened tooth enamel samples were distinctive, though the colour parameter changes within the samples were equivalent. Home bleaching achieved colour modification by demineralisation, whereas in-office bleaching depended on redistribution of the minerals after treatment and subsequent enhanced mineralisation.

Keywords: Enamel, Bleach, Micro-computed tomography, Mineralisation

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PII: S0003-9969(10)00049-X

doi:10.1016/j.archoralbio.2010.02.009

Archives of Oral Biology
Volume 55, Issue 4 , Pages 300-308, April 2010

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