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Different corrosive effects on hydroxyapatite nanocrystals and amine fluoride-based mouthwashes on dental titanium brackets: a comparative in vitro study

Authors Lelli M, Marchisio O, Foltran I, Genovesi A, Montebugnoli G, Marcaccio M, Covani U, Roveri N

Received 21 June 2012

Accepted for publication 17 August 2012

Published 17 January 2013 Volume 2013:8(1) Pages 307—314

DOI https://doi.org/10.2147/IJN.S35245

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 5

Marco Lelli,1 Olivia Marchisio,2 Ismaela Foltran,1 Annamaria Genovesi,2 Giulia Montebugnoli,1 Massimo Marcaccio,1 Ugo Covani,2 Norberto Roveri1

1Alma Mater Studiorum, University of Bologna, Department of Chemistry, Bologna, Italy; 2University of Pisa, Istituto Stomatologico Tirreno, Lido di Camaiore, Lucca, Italy

Abstract: Titanium plates treated in vitro with a mouthwash containing amine fluoride (100 ppm F-) and another containing zinc-substituted carbonate–hydroxyapatite have been analyzed by scanning electron microscopy and atomic force microscopy to evaluate the modification of the surface roughness induced by treatment with these two different mouthwashes. The treatment with F--based mouthwash produces a roughness characterized by higher peaks and deeper valleys in the streaks on the titanium bracket surface compared with those observed in the reference polished titanium plates. This effect causes a mechanical weakness in the metallic dental implant causing bacterial growth and therefore promotes infection and prosthesis contamination. However, the in vitro treatment with a mouthwash containing zinc-substituted carbonate–hydroxyapatite reduced the surface roughness by filling the streaks with an apatitic phase. This treatment counteracts the surface oxidative process that can affect the mechanical behavior of the titanium dental implant, which inhibits the bacterial growth contaminating prostheses.

Keywords: mouthwash, titanium brackets, corrosion, hydroxyapatite, aminic fluoride

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