Effect of preconditioning cobalt and nickel based dental alloys with Bacillus sp. extract on their surface physicochemical properties and theoretical prediction of Candida albicans adhesion.
Identifieur interne : 000005 ( Main/Exploration ); précédent : 000004; suivant : 000006Effect of preconditioning cobalt and nickel based dental alloys with Bacillus sp. extract on their surface physicochemical properties and theoretical prediction of Candida albicans adhesion.
Auteurs : Mounyr Balouiri [Maroc] ; Samira Bouhdid [Maroc] ; Moulay Sadiki [Maroc] ; Wessal Ouedrhiri [Maroc] ; Hassan Barkai [Maroc] ; Omar El Farricha [Maroc] ; Saad Koraichi Ibnsouda [Maroc] ; El Houssaine Harki [Maroc]Source :
- Materials science & engineering. C, Materials for biological applications [ 1873-0191 ] ; 2017.
Abstract
Biofilm formation on dental biomaterials is implicated in various oral health problems. Thus the challenge is to prevent the formation of this consortium of microorganisms using a safe approach such as antimicrobial and anti-adhesive natural products. Indeed, in the present study, the effects of an antifungal extract of Bacillus sp., isolated from plant rhizosphere, on the surface physicochemical properties of cobalt and nickel based dental alloys were studied using the contact angle measurements. Furthermore, in order to predict the adhesion of Candida albicans to the treated and untreated dental alloys, the total free energy of adhesion was calculated based on the extended Derjaguin-Landau-Verwey-Overbeek approach. Results showed hydrophobic and weak electron-donor and electron-acceptor characteristics of both untreated dental alloys. After treatment with the antifungal extract, the surface free energy of both dental alloys was influenced significantly, mostly for cobalt based alloy. In fact, treated cobalt based alloy became hydrophilic and predominantly electron donating. Those effects were time-dependent. Consequently, the total free energy of adhesion of C. albicans to this alloy became unfavorable after treatment with the investigated microbial extract. A linear relationship between the electron-donor property and the total free energy of adhesion has been found for both dental alloys. Also, a linear relationship has been found between this latter and the hydrophobicity for the cobalt based alloy. However, the exposure of nickel based alloy to the antifungal extract failed to produce the same effect.
DOI: 10.1016/j.msec.2016.09.083
PubMed: 27987667
Affiliations:
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C, Materials for biological applications</title><idno type="eISSN">1873-0191</idno><imprint><date when="2017" type="published">2017</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Biofilm formation on dental biomaterials is implicated in various oral health problems. Thus the challenge is to prevent the formation of this consortium of microorganisms using a safe approach such as antimicrobial and anti-adhesive natural products. Indeed, in the present study, the effects of an antifungal extract of Bacillus sp., isolated from plant rhizosphere, on the surface physicochemical properties of cobalt and nickel based dental alloys were studied using the contact angle measurements. Furthermore, in order to predict the adhesion of Candida albicans to the treated and untreated dental alloys, the total free energy of adhesion was calculated based on the extended Derjaguin-Landau-Verwey-Overbeek approach. Results showed hydrophobic and weak electron-donor and electron-acceptor characteristics of both untreated dental alloys. After treatment with the antifungal extract, the surface free energy of both dental alloys was influenced significantly, mostly for cobalt based alloy. In fact, treated cobalt based alloy became hydrophilic and predominantly electron donating. Those effects were time-dependent. Consequently, the total free energy of adhesion of C. albicans to this alloy became unfavorable after treatment with the investigated microbial extract. A linear relationship between the electron-donor property and the total free energy of adhesion has been found for both dental alloys. Also, a linear relationship has been found between this latter and the hydrophobicity for the cobalt based alloy. However, the exposure of nickel based alloy to the antifungal extract failed to produce the same effect.</div></front></TEI><affiliations><list><country><li>Maroc</li></country></list><tree><country name="Maroc"><noRegion><name sortKey="Balouiri, Mounyr" sort="Balouiri, Mounyr" uniqKey="Balouiri M" first="Mounyr" last="Balouiri">Mounyr Balouiri</name></noRegion><name sortKey="Barkai, Hassan" sort="Barkai, Hassan" uniqKey="Barkai H" first="Hassan" last="Barkai">Hassan Barkai</name><name sortKey="Bouhdid, Samira" sort="Bouhdid, Samira" uniqKey="Bouhdid S" first="Samira" last="Bouhdid">Samira Bouhdid</name><name sortKey="El Farricha, Omar" sort="El Farricha, Omar" uniqKey="El Farricha O" first="Omar" last="El Farricha">Omar El Farricha</name><name sortKey="Harki, El Houssaine" sort="Harki, El Houssaine" uniqKey="Harki E" first="El Houssaine" last="Harki">El Houssaine Harki</name><name sortKey="Ibnsouda, Saad Koraichi" sort="Ibnsouda, Saad Koraichi" uniqKey="Ibnsouda S" first="Saad Koraichi" last="Ibnsouda">Saad Koraichi Ibnsouda</name><name sortKey="Ouedrhiri, Wessal" sort="Ouedrhiri, Wessal" uniqKey="Ouedrhiri W" first="Wessal" last="Ouedrhiri">Wessal Ouedrhiri</name><name sortKey="Sadiki, Moulay" sort="Sadiki, Moulay" uniqKey="Sadiki M" first="Moulay" last="Sadiki">Moulay Sadiki</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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