Mesoscale structure of human and mouse enamel

ORAL

Abstract

We recently discovered that apatite exhibit X-ray linear dichroism [1,2] at the Ca L-edge, an effect that enables Polarization-dependent Imaging Contrast (PIC) mapping [3,4] of apatite, to quantitatively measure and display nanocrystal orientations. Here we present PIC maps revealing unexpected and unprecedented observations in the structure and orientation of crystals in human and mouse dental enamels, at the mesoscale, that is, between 10 nm and 10 µm.
1. MA Marcus et al. ACS Nano in press 2017, DOI:10.1021/acsnano.7b05044
2. CA Stifler et al. PRL under review 2017
3. PUPA Gilbert et al. PNAS 108, 2011. DOI: 10.1073/pnas.1107917108
4. PUPA Gilbert et al. EPSL 460, 2017. DOI: http://dx.doi.org/10.1016/j.epsl.2016.11.012

*Supported by NSF grant DMR-1603192 and DOE grant DE-FG02-07ER15899

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Presenters

  • Pupa Gilbert

    • Department of Physics, Chemistry, and Geoscience, University of Wisconsin-Madison
    • Department of Physics, University of Wisconsin-Madison
    • Department of Physics, University of Wisconsin–Madison
    • Physics, Chemistry, Geoscience, Univ of Wisconsin
    • Departments of Chemistry, Materials Science, and Geoscience, University of Wisconsin-Madison
    • University of Wisconsin-Madison
    • Univ of Wisconsin, Madison

Authors

  • Pupa Gilbert

    • Department of Physics, Chemistry, and Geoscience, University of Wisconsin-Madison
    • Department of Physics, University of Wisconsin-Madison
    • Department of Physics, University of Wisconsin–Madison
    • Physics, Chemistry, Geoscience, Univ of Wisconsin
    • Departments of Chemistry, Materials Science, and Geoscience, University of Wisconsin-Madison
    • University of Wisconsin-Madison
    • Univ of Wisconsin, Madison

  • Elia Beniash

    • Oral Biology, School of Dental Medicine, UPitt

  • Cayla Stifler

    • Department of Physics, University of Wisconsin-Madison
    • Department of Physics, University of Wisconsin–Madison
    • Physics, Chemistry, Geoscience, Univ of Wisconsin

  • Chang-Yu Sun

    • Department of Physics, University of Wisconsin-Madison
    • Department of Physics, University of Wisconsin–Madison
    • Physics, Chemistry, Geoscience, Univ of Wisconsin
    • University of Wisconsin-Madison

  • Hajime Yamazaki

    • Department of Biomineralization, The Forsyth Institute

  • Henry Margolis

    • Department of Biomineralization, The Forsyth Institute