Synthesis of bioactive glass-based coating by plasma electrolytic oxidation: Untangling a new deposition pathway toward titanium implant surfaces

Autor(es):Mostrar menos -

Costa, Raphael C. ^[1] ; Souza, Joao G. S. ^[1] ; Cordeiro, Jairo M. ^[1] ; Bertolini, Martinna ^[2] ; de Avila, Erica D. ^[3] ; Landers, Richard ^[4] ; Rangel, Elidiane C. ^[5] ; Fortulan, Carlos A. ^[6] ; Retamal-Valdes, Belen ^[7] ; da Cruz, Nilson C. ^[5] ; Feres, Magda ^[7] ; Barao, Valentim A. R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, UNICAMP, Piracicaba Dent Sch, Dept Prosthodont & Periodontol, Av Limeira 901, BR-13414903 Sao Paulo - Brazil

^[2] Univ Connecticut, Sch Dent Med, Oral Hlth & Diagnost Sci Dept, Div Periodontol, 263 Farmington Ave, Farmington, CT 06030 - USA

^[3] Sao Paulo State Univ, Sch Dent Araraquara, Dept Dent Mat & Prosthodont, UNESP, R Humaita 1680, BR-14801903 Araraquara, SP - Brazil

^[4] Univ Estadual Campinas, UNICAMP, Inst Phys Gleb Wataghin, Cidade Univ Zeferino Vaz, BR-13083859 Sao Paulo, SP - Brazil

^[5] Sao Paulo State Univ, UNESP, Inst Sci & Technol, Lab Technol Plasmas, Av Tres de Marco 511, BR-18087180 Sao Paulo - Brazil

^[6] Univ Sao Paulo, Dept Mech Engn, Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil

^[7] Univ Guarulhos, Dent Res Div, Dept Periodontol, Eng Prestes Maia 88, BR-07023070 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Colloid and Interface Science; v. 579, p. 680-698, NOV 1 2020.
• Citações Web of Science: 2

Resumo

Hypothesis: Although bioactive glass (BG) particle coatings were previously developed by different methods, poor particle adhesion to surfaces and reduced biological effects because of glass crystallization have limited their biomedical applications. To overcome this problem, we have untangled, for the first time, plasma electrolytic oxidation (PEO) as a new pathway for the synthesis of bioactive glass-based coating (PEO-BG) on titanium (Ti) materials. Experiments: Electrolyte solution with bioactive elements (Na2SiO3-5H(2)O, C4H6O4Ca, NaNO3, and C3H7Na2O6P) was used as a precursor source to obtain a 45S5 bioglass-like composition on a Ti surface by PEO. Subsequently, the PEO-BG coating was investigated with respect to its surface, mechanical, tribological, electrochemical, microbiological, and biological properties, compared with those of machined and sandblasted/acid-etched control surfaces. Findings: PEO treatment produced a coating with complex surface topography, Ti crystalline phases, superhydrophilic status, chemical composition, and oxide layer similar to that of 4555-6G (similar to 45.0Si, 24.5 Ca, 24.5Na, 6.0P w/v%). PEO-BG enhanced Ti mechanical and tribological properties with higher corrosion resistance. Furthermore, PEO-BG had a positive influence in polymicrobial biofilms, by reducing pathogenic bacterial associated with biofilm-related infections. PEO-BG also showed higher adsorption of blood plasma proteins without cytotoxic effects on human cells, and thus may be considered a promising biocompatible approach for biomedical implants. (C) 2020 Elsevier Inc. All rights reserved. (AU)

• Processo FAPESP: 18/04630-2 - Síntese de filme de vidro bioativo para superfície de titânio por meio de plasma eletrolítico de oxidação: análise eletroquímica e antimicrobiana em modelo de microcosmos
• Beneficiário: Raphael Cavalcante Costa
• Modalidade de apoio: Bolsas no Brasil - Mestrado