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    Crystallographic texture and mineral concentration quantification of developing and mature human incisal enamel

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    Publication date
    2018-09
    Author
    Al-Mosawi, M.
    Davis, G.R.
    Bushby, A.
    Montgomery, J.
    Beaumont, Julia
    Al-Jawad, M.
    Keyword
    Dental human enamel
    Mineralization
    Human tissue
    Crystallographic texture
    Rights
    © The Author(s) 2018. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
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    Abstract
    For dental human enamel, what is the precise mineralization progression spatially and the precise timings of mineralization? This is an important question in the fundamental understanding of matrix-mediated biomineralization events, but in particular because we can use our understanding of this natural tissue growth in humans to develop biomimetic approaches to repair and replace lost enamel tissue. It is important to understand human tissues in particular since different species have quite distinct spatial and temporal progression of mineralization. In this study, five human central incisors at different stages of enamel maturation/mineralization were spatially mapped using synchrotron X-ray diffraction and X-ray microtomography techniques. From the earliest developmental stage, two crystallite-orientation populations coexist with angular separations between the crystallite populations averaging approximately 40o and varying as a function of position with the tooth crown. In general, population one had significantly lower texture magnitude and contributed a higher percentage to the overall crystalline structure, compared to population two which only contributed 20-30% but had significantly higher texture magnitude. This quantitative analysis allows us to understand the complex and co-operative structure-function relationship between two populations of crystallites within human enamel. There was an increase in the mineral concentration from the enamel-dentin junction peripherally and from the incisal tip cervically as a function of maturation time. Quantitative backscattered-electron analyses revealed that mineralization of prism cores precedes that of prism boundaries. These results provide new insights into the precise understanding of the natural growth of human enamel.
    URI
    http://hdl.handle.net/10454/16576
    Version
    published version paper
    Citation
    Al-Mosawi M, Davis GR, Bushby A et al (2018) Crystallographic texture and mineral concentration quantification of developing and mature human incisal enamel. Scientific Reports. 8: 14449.
    Link to publisher’s version
    https://doi.org/10.1038/s41598-018-32425-y
    Type
    Article
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    Life Sciences Publications

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