Corrosion kinetics and topography analysis of Ti-6Al-4V alloy subjected to different mouthwash solutions

Autor(es)

Faverani, Leonardo Perez ^{[1, 2, 3]} ; Ricardo Barao, Valentim Adelino ^[4] ; Araujo Pires, Maria Flavia ^[1] ; Yuan, Judy Chia-Chun ^[5] ; Sukotjo, Cortino ^[5] ; Mathew, Mathew T. ^[6] ; Assuncao, Wirley Goncalves ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Dent Mat & Prosthodont, BR-16015050 Sao Paulo - Brazil

^[2] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Surg, BR-16015050 Sao Paulo - Brazil

^[3] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Integrated Clin, BR-16015050 Sao Paulo - Brazil

^[4] Univ Estadual Paulista UNESP, Aracatuba Dent Sch, Dept Prosthodont & Periodontol, BR-16015050 Sao Paulo - Brazil

^[5] Univ Illinois, Coll Dent, Dept Restorat Dent, Chicago, IL 60612 - USA

^[6] Rush Univ, Med Ctr, Dept Orthoped Surg, Chicago, IL 60612 - USA

• Tipo de documento: Artigo Científico
• Fonte: Materials Science & Engineering C-Materials for Biological Applications; v. 43, p. 1-10, OCT 1 2014.
• Citações Web of Science: 12

Resumo

This study evaluated the corrosion kinetics and surface topography of Ti-6Al-4V alloy exposed to mouthwash solutions (0.12% chlorhexidine digluconate, 0.053% cetylpyridinium chloride and 3% hydrogen peroxide) compared to artificial saliva (pH 6.5) (control). Twenty Ti-6Al-4V alloy disks were used and divided into 4 groups (n = 5). For the electrochemical assay, standard tests as open circuit potential and electrochemical impedance spectroscopy (EIS) were applied at baseline, 7 and 14 days after immersion in the solutions. Scanning electron microscopy, atomic force microscopy and profilometry (average roughness - R-a) were used for surface characterization. Total weight loss of disks was calculated. Data were analyzed by ANOVA and Bonferroni's test (alpha = 0.05). Hydrogen peroxide generated the lowest polarization resistance (R-p) values for all periods (P < 0.05). For the capacitance (C-dl), similar results were observed among groups at baseline (P = 0.098). For the 7 and 14-day periods, hydrogen peroxide promoted the highest C-dl values (P < 0.0001). Hydrogen peroxide promoted expressive superficial changes and greater Ra values than the others (P < 0.0001). It could be concluded that solutions containing cetylpyridinium chloride and chlorhexidine digluconate might be the mouthwashes of choice during the post-operatory period of dental implants. However, hydrogen peroxide is counter-indicated in these situations. Further studies evaluating the dynamics of these solutions (tribocorrosion) and immersing the disks in daily cycles (two or three times a day) to mimic a clinical situation closest to the application of mouthwashes in the oral cavity are warranted to prove our results. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 11/20021-7 - O papel da nicotina, cotinina e cafeína no comportamento eletroquímico e colonização bacteriana do Ticp. um estudo in vitro
• Beneficiário: Wirley Goncalves Assuncao
• Modalidade de apoio: Auxílio à Pesquisa - Regular