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Distribution of Enamel Crystallite Orientation through an Entire Tooth Crown studied using Synchrotron X-Ray Diffraction

Simmons, L.M., Al-Jawad, M., Kilcoyne, Susan H. and Wood, D.J. (2011) Distribution of Enamel Crystallite Orientation through an Entire Tooth Crown studied using Synchrotron X-Ray Diffraction. European Journal of Oral Sciences, 119 (S). pp. 1-6. ISSN 0909-8836

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    Abstract

    The biomineralization of human dental enamel has resulted in a highly anisotropic and
    heterogeneous distribution of hydroxyapatite crystallites, which in combination with
    its high mineral content has resulted in one of the most durable and hardest tissues in
    the human body. In this study, we used position-sensitive synchrotron X-ray diffrac-
    tion to quantify the spatial variation in the direction and magnitude of the preferred
    orientation of enamel crystallites across a whole tooth crown. Two-dimensional syn-
    chrotron X-ray diffraction images were collected with 300 lm spatial resolution over a
    series of six sequential tooth sections obtained from a single maxillary first premolar
    and were analyzed using Rietveld refinement. Both the magnitude and the direction of
    the crystallite orientation were found to have a high spatial heterogeneity. Areas of
    high crystallite alignment were directed perpendicular to the biting surfaces, which is
    thought to meet the functional requirements of mastication. The results may assist in
    our understanding of the structure–function relationship and of the evolutionary
    development of enamel.

    Item Type: Article
    Subjects: Q Science > Q Science (General)
    Q Science > QC Physics
    Schools: School of Applied Sciences
    Related URLs:
    Depositing User: Sara Taylor
    Date Deposited: 06 Dec 2011 14:03
    Last Modified: 06 Dec 2011 15:26
    URI: http://eprints.hud.ac.uk/id/eprint/12091

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