Raman spectroscopy-multivariate analysis related to morphological surface features on nanomaterials applied for dentin coverage

Author(s)

Silva Soares, Luis Eduardo ^[1] ; Nahorny, Sidnei ^[1] ; Braga, Vivian de Faria ^[1] ; Marciano, Fernanda Roberta ^[2] ; Bhattacharjee, Tanmoy T. ^[3] ; Lobo, Anderson Oliveira ^[4]

Affiliation

^[1] Univ Vale Paraiba, Res & Dev Inst IP&D, LDAM, Sao Jose Dos Campos, SP - Brazil

^[2] UFPI Fed Univ Piaui, Dept Phys, BR-64049550 Teresina, PI - Brazil

^[3] Sir John Walsh Res Ctr, 310 Great King St, Dunedin 9016 - New Zealand

^[4] UFPI Fed Univ Piaui, Dept Mat Engn, LIMAV Interdisciplinary Lab Adv Mat, BR-64049550 Teresina, PI - Brazil

• Document type: Journal article
• Source: SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY; v. 228, MAR 5 2020.
• Web of Science Citations: 0

Abstract

Raman spectroscopy and scanning electron microscopy (SEM) were used to investigate the effect of coating materials and acidulated phosphate fluoride gel (APF) treatment on dentin before and after erosion-abrasion cycles. A multi-walled carbon nanotube/graphene oxide hybrid carbon-based material (MWCNTO-GO), nanohydroxyapatite (nHAp), or a combined composite (nHAp/MWCNTO-GO) were used as a coating. Seventy root dentin fragments obtained from 40 bovine teeth were prepared and divided into groups (n = 10): negative control, artificial saliva - C, positive control - APF; nHAp; MWCNTO-GO; APF\_nHAp; APF\_MWCNTO-GO and APF\_nHAp/MWCNTO-GO. All samples were subjected to cycles of demineralization (orange juice, pH similar to 3.7, room temperature, 1 min) followed by remineralization (saliva, 37 degrees C, 1 h). The remineralization procedures were followed by tooth brushing (150 strokes). The above cycle was repeated 3x/day for 5 days. The previous APF treatment of dentin allowed a better affinity of nHAp and MWCNTO-GO with the inorganic and organic portion of dentin, respectively. This interaction indicates the formation of a protective layer for the dentin surface and for the collagen giving possible protection against erosion. SEM micrographs illustrated the formation of a protective layer after application of the biomaterials and that it was partially or totally removed after the erosion and abrasion. Raman spectroscopy combined with multivariate analysis could distinguish samples with respect to treatment efficacy. The APF\_nHAP/MWCNT-GO composite has shown to be a promising material since it has binding characteristics both to the inorganic and organic portion of the dentin and reduced solubility. Mineral-to-matrix ratio (MMR) parameter analysis confirmed the binding capability of MWCNTO-GO-based materials to dentin. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• 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: 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: 16/00575-1 - Functional biomembranes based on peptides and bottlebrush polymers to tissue engineering
• Grantee: Fernanda Roberta Marciano
• Support type: Scholarships abroad - Research
• 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: 14/21587-2 - Development of supercapacitors devices from graphene, carbon nanotubes and diamonds
• Grantee: Hudson Giovani Zanin
• Support type: Scholarships in Brazil - Young Researchers
• FAPESP's process: 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: 14/02163-7 - Development of supercapacitors devices from graphene, carbon nanotubes and diamonds
• Grantee: Hudson Giovani Zanin
• Support type: Research Grants - Young Investigators Grants