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2D mapping of texture and lattice parameters of dental enamel

Al-Jawad, Maisoon, Steuwer, Axel, Kilcoyne, Susan H., Shore, Roger C., Cywinski, R. and Wood, David J. (2007) 2D mapping of texture and lattice parameters of dental enamel. Biomaterials, 28 (18). pp. 2908-2914. ISSN 01429612

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Abstract

We have used synchrotron X-ray diffraction to study the texture and the change in lattice parameter as a function of position in a cross section of human dental enamel. Our study is the first to map changes in preferred orientation and lattice parameter as a function of position within enamel across a whole tooth section with such high resolution. Synchrotron X-ray diffraction with a micro-focused beam spot was used to collect two-dimensional (2D) diffraction images at 150 μm spatial resolution over the entire tooth crown. Contour maps of the texture and lattice parameter distribution of the hydroxyapatite phase were produced from Rietveld refinement of diffraction patterns generated by azimuthally sectioning and integrating the 2D images. The 002 Debye ring showed the largest variation in intensity. This variation is indicative of preferred orientation. Areas of high crystallite alignment on the tooth cusps match the expected biting surfaces. Additionally we found a large variation in lattice parameter when travelling from the enamel surface to the enamel-dentine junction. We believe this to be due to a change in the chemical composition within the tooth. The results provide a new insight on the texture and lattice parameter profiles within enamel

Item Type: Article
Subjects: Q Science > Q Science (General)
Q Science > QH Natural history > QH301 Biology
Q Science > QA Mathematics > QA76 Computer software
Schools: School of Applied Sciences
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Depositing User: Sara Taylor
Date Deposited: 19 Feb 2009 16:37
Last Modified: 29 Nov 2012 12:42
URI: http://eprints.hud.ac.uk/id/eprint/3443

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