Title : Chemical gradients in human enamel crystallites.

Pub. Date : 2020 Jul

PMID : 32612224






1 Functional Relationships(s)
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1 Here we show, using atomic-scale quantitative imaging and correlative spectroscopies, that the nanoscale crystallites of hydroxylapatite (Ca5(PO4)3(OH)), which are the fundamental building blocks of enamel, comprise two nanometric layers enriched in magnesium flanking a core rich in sodium, fluoride and carbonate ions; this sandwich core is surrounded by a shell with lower concentration of substitutional defects. Magnesium carbonic anhydrase 5A Homo sapiens