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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Multi-walled carbon nanotubes/graphene oxide hybrid and nanohydroxyapatite composite: A novel coating to prevent dentin erosion

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Author(s):
Nahorny, Sidnei ; Zanin, Hudson ; Christino, Vinie Abreu ; Marciano, Fernanda Roberta ; Oliveira Lobo, Anderson ; Silva Soares, Luis Eduardo
Total Authors: 6
Document type: Journal article
Source: Materials Science & Engineering C-Materials for Biological Applications; v. 79, p. 199-208, OCT 1 2017.
Web of Science Citations: 10
Abstract

To date is emergent the development of novel coatings to protect erosion, especially to preventive dentistry and restorative dentistry. Here, for the first time we report the effectiveness of multi-walled carbon nanotube/graphene oxide hybrid carbon-base material (MWCNTO-GO) combined with nanohydroxyapatite (nHAp) as a protective coating for dentin erosion. Fourier transform Raman spectroscopy (FT-Raman), scanning electron (SEM), and transmission electron (TEM) microscopy were used to investigated the coatings and the effect of acidulated phosphate fluoride gel (APF) treatment on bovine teeth root dentin before and after erosion. The electrochemical corrosion performance of the coating was evaluated. Raman spectra identified that: (i) the phosphate (v(1)PO(4)(3-)) content of dentin was not significantly affected by the treatments and (ii) the carbonate (v(1)CO(3)(2-)) content in dentin increased when nHAp was used. However, the nHAp/MWCNTO-GO composite exposited lower levels of organic matrix (C-H bonds) after erosion compared to other treatments. Interesting, SEM micrographs identified that the nHAp/MWCNTO-GO formed layers after erosive cycling when associate with APF treatment, indicating a possible chemical bond among them. Treatments of root dentin with nHAp, MWCNTO-GO, APF\_MWCNTO-GO, and APF nHAp/MWCNTO-GO increased the carbonate content, carbonate/phosphate ratio, and organic matrix band area after erosion. The potentiodynamic polarization curves and Nyquist plot showed that nHAp, MWCNT-GO and nHAp/MWCNT-GO composites acted as protective agents against corrosion process. Clearly, the nHAp/MWCNTO-GO composite was stable after erosive cycling and a thin and add-resistant film was formed when associated to APF treatment. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 14/21587-2 - Development of supercapacitors devices from graphene, carbon nanotubes and diamonds
Grantee:Hudson Giovani Zanin
Support type: Scholarships in Brazil - Young Researchers
FAPESP's process: 11/17877-7 - Development of new polymeric scaffolds by electrospinning technique with incorporation of vertically aligned carbon nanotubes and nanohidroxyapatite for bone tissue regeneration
Grantee:Anderson de Oliveira Lobo
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 13/11192-8 - Application of nanobiomaterials in the prevention of dental erosion
Grantee:Luís Eduardo Silva Soares
Support type: Regular Research Grants
FAPESP's process: 14/02163-7 - Development of supercapacitors devices from graphene, carbon nanotubes and diamonds
Grantee:Hudson Giovani Zanin
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 15/09697-0 - Electrospinning of novel functional nanobiomaterials based on peptides and bottlebrush polymers for tissue engineering
Grantee:Anderson de Oliveira Lobo
Support type: Scholarships abroad - Research
FAPESP's process: 13/20825-4 - Study of the growth of diamond-like carbon films containing incorporated titanium dioxide nanoparticles
Grantee:Vinie de Abreu Christino
Support type: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 11/20345-7 - Study of nanoparticle-incorporated diamond-like carbon films for biomedical applications
Grantee:Fernanda Roberta Marciano
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 15/50093-0 - Brazil and UK collaboration for energy storage and supply
Grantee:Hudson Giovani Zanin
Support type: Regular Research Grants
FAPESP's process: 16/00575-1 - Functional biomembranes based on peptides and bottlebrush polymers to tissue engineering
Grantee:Fernanda Roberta Marciano
Support type: Scholarships abroad - Research