Study of the nanoporous CHAP photoluminiscence for developing the precise methods of early caries detection

International Conference on Mechanical Engineering and Applied Composite Materials

机械制造;材料科学

Goloshchapov, D.^1 ; Seredin, P.^1 ; Minakov, D.^2 ; Domashevskaya, E.^1

Department of Solid State Physics and Nanostructures, Voronezh State University, Voronezh, Russia^1

Department of Physical and Mathematical Sciences, Voronezh State University, Voronezh, Russia^2

关键词: Apatite structures;    Carbonate-substituted hydroxyapatite;    Dental enamels;    Dental tissues;    Luminescence characteristics;    Mineral component;    Nanocrystalline surfaces;    Nanocrystallines;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/307/1/012027/pdf
DOI  :  10.1088/1757-899X/307/1/012027

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This paper deals with the luminescence characteristics of an analogue of the mineral component of dental enamel of the nanocrystalline B-type carbonate-substituted hydroxyapatite (CHAP) with 3D defects (i.e. nanopores of ∼2-5 nm) on the nanocrystalline surface. The laser-induced luminescence of the synthesized CHAP samples was in the range of ∼515 nm (∼2.4 eV) and is due to CO3groups replacing the PO4group. It was found that the intensity of the luminescence of the CHAP is caused by structurally incorporated CO3groups in the HAP structure. Furthermore, the intensity of the luminescence also decreases as the number of the above intracentre defects (CO3) in the apatite structure declines. These results are potentially promising for developing the foundations for precise methods for the early detection of caries in human solid dental tissue.