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Citric acid passivation of titanium dental implants for minimizing bacterial colonization impact

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Punset Fuste, MiquelMés informacióMés informacióMés informació
Vilarrasa Sánchez, Javier
Nart Molina, José
Manero Planella, José MaríaMés informacióMés informacióMés informació
Bosch Canals, Begoña María
Padrós, Roberto
Pérez Antoñanzas, Román
Gil Mur, Javier
CovenanteeUniversitat Internacional de Catalunya; Barcelona Dental Institute
Document typeArticle
Defense date2021-02-12
PublisherMultidisciplinary Digital Publishing Institute (MDPI)
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
Surface topography and physical-chemical properties usually play a key-role in both osseointegration improvement and bacterial colonization reduction over the surface of dental implants. The aim of this study is to compare the chemical and bacteriological behavior of two different acid passivation surface treatments on titanium c.p. grade 3 used for dental implant manufacturing. Surface roughness was evaluated using White Light Interferometry (WLI) in order to determine different roughness parameters such as average roughness (Sa), the spacing parameter (Sm) and the hybrid parameter of surface index area (SIA). Contact angle (CA) and surface free energy (SFE) were evaluated in order to establish the surface wettability of the different groups of samples. Titanium ion-release from the different samples was also been analyzed in Hank’s solution medium at 37 °C by using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) at different immersion times. Bacterial viability adhesion assays were done using S. sanguinis (CECT 480, Spain) as a bacterial strain model of primary colonizer in oral biofilm formation. The bacteria attachment and morphology on Ti surfaces were determined using a live/dead staining method after 4 h of incubation and further analyzed by scanning electron microscope (SEM). Acid passivation surface treatments produced a statistically-significant (p < 0.05) roughness increase in all the evaluated parameters (Sa, Sm, SAI). The treatment with citric acid decreased the static contact angle (CA) and caused an increase in surface free energy (SFE) with a high polarization and oxidizing character. These physical-chemical surface characteristics obtained by means of citric acid passivation caused the bactericidal behavior as it has been proved in bacterial studies.
CitationPunset, M. [et al.]. Citric acid passivation of titanium dental implants for minimizing bacterial colonization impact. "Coatings", 12 Febrer 2021, vol. 11, núm. 2, p. 214. 
URIhttp://hdl.handle.net/2117/348296
DOI10.3390/coatings11020214
ISSN2079-6412
Publisher versionhttps://www.mdpi.com/2079-6412/11/2/214
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  • Departament de Ciència i Enginyeria de Materials - Articles de revista [513]
  • BBT - Biomaterials, Biomecànica i Enginyeria de Teixits - Articles de revista [369]
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