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Title: A zinc oxide-modified hydroxyapatite-based cement facilitated new crystalline-stoichiometric and amorphous apatite precipitation on dentine.
Authors: Toledano, M
Pérez-Álvarez, M C
Aguilera, F S
Osorio, E
Cabello, I
Toledano-Osorio, M
Osorio, R
Keywords: Raman;crystallinity;dentine;hydroxyapatite;remineralization;zinc
metadata.dc.subject.mesh: Dental Cements
Materials Testing
Phosphoric Acids
Spectrum Analysis, Raman
Surface Properties
Tooth Remineralization
Zinc Oxide
Issue Date: 31-Jul-2017
Abstract: To evaluate the remineralization ability of two endodontic sealer cements. Mid-coronal dentine surfaces were subjected to: (i) 37% phosphoric acid (PA) or (ii) 0.5 mol L-1 ethylenediaminetetraacetic acid (EDTA) conditioning prior to the application of two experimental hydroxyapatite-based cements, containing sodium hydroxide (calcypatite) or zinc oxide oxiapatite respectively. Samples were stored in simulated body fluid for 24 h or 21 days. Remineralization of the dentine surfaces were studied by Raman spectroscopy (mapping with K-means cluster and hierarchical cluster analysis) was undertaken. Nanoroughness and collagen fibril width measurements were performed with an atomic force microscopy. ANOVA and Student-Newman-Keuls test were performed (α=0.05). Phosphoric acid+oxiapatite promoted both the highest dentine mineralization (P  Dentine surfaces treated with PA+oxiapatite attained the highest dentine remineralization with both crystalline-stoichiometric and amorphous apatites, at 21 days. EDTA conditioning facilitated amorphous-bulk mineral precipitation. The amorphization was more intense after using oxiapatite and provided an ion-rich environment favouring in situ dentine remineralization.
metadata.dc.identifier.doi: 10.1111/iej.12807
Appears in Collections:Producción 2020

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