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Characterization of bone mineral crystals in horse radius by small-angle X-ray scattering

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Abstract

The size and the orientation of the bone salt (mineral) crystals in the cranial and caudal zones in the transverse midshaft section of the equine radius were investigated by small-angle X-ray scattering (SAXS). The results are interpreted as indicating that the crystals had an elongated shape with an average thickness of T=3.79±0.20 nm in the cranial region. Their orientation was predominantly in the longitudinal direction of the bone. There was no preferential orientation within the transverse plane. The distribution of tilt angles with respect to the longitudinal direction was determined directly from the SAXS data: the average angle was about 30° for the cranial region and 45° for the caudal region. Assuming that the needle-like crystals are parallel with the collagen fibrils, the angular distribution of the crystals is in good agreement with previous measurements of collagen orientation using circularly polarized light microscopy.

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Authors and Affiliations

  1. Institut für Festkörperphysik der Universität Wien, Strudlhofg.4, A-1090, Wien, Austria

    P. Fratzl & S. Schreiber

  2. Ludwig Boltzmann-Institute for Osteology, Hanusch Hospital, Austria

    P. Fratzl

  3. 4th Medical Department, Hanusch Hospital, Austria

    P. Fratzl

  4. Department of Anatomy and Developmental Biology, University College London, WC1E 6BT, London, England

    A. Boyde

Authors
  1. P. Fratzl
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  2. S. Schreiber
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  3. A. Boyde
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Fratzl, P., Schreiber, S. & Boyde, A. Characterization of bone mineral crystals in horse radius by small-angle X-ray scattering. Calcif Tissue Int 58, 341–346 (1996). https://doi.org/10.1007/BF02509383

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  • DOI: https://doi.org/10.1007/BF02509383

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