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Insights Into the Morphological Structure of Remineralized Dentin Obtained by Synchrotron Radiation and Micro-Pixe Publisher



Karrari SZ1 ; Afarideh H1 ; Kermanshah H2 ; Aquilanti G3 ; Agha Aligol D4 ; Shahidi Z2 ; Pollastri S3 ; Oliveira De Souza D3
Authors
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Authors Affiliations
  1. 1. Department of Energy Engineering and Physics, Amirkabir University of Technology, Tehran, Iran
  2. 2. Department of Restorative Dentistry, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Elettra—Sincrotrone Trieste, Strada Statale 14—km 163, 5 in AREA Science Park, TS, Basovizza, 34149, Italy
  4. 4. Van de Graaff Laboratory Physics and Accelerators Research School, Tehran, Iran

Source: Journal of Materials Science Published:2023


Abstract

This in vitro study has evaluated the effect of OrthoMTA as a commercially available dental bioactive cement on artificial demineralized dentine through indirect pulp capping (IPC), using complementary analysis techniques. The concentration of elements in de/remineralized regions and ions diffusion has been observed using synchrotron radiation X-ray fluorescence (SR-XRF) and micro-proton-induced X-ray emission (µ-PIXE) images, respectively. The model compounds (Ca10(PO4)6(OH)2) and calcium phosphate were compared using X-ray absorption near-edge structure (XANES) measurements on de/remineralized dentin regions. XANES analysis showed that the calcium environment at remineralized dentin has a structure with mixed features between HA and calcium phosphate, showing that effectively OrthoMTA application can recover the Ca species of the original tooth. Our results show that the use of OrthoMTA, in addition to being used in direct pulp capping, can also be used on the surface of artificial demineralized dentin for remineralization of affected dentin which extends its application in IPC procedures. © 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.