Behavior of NiTi in the presence of oral bacteria: corrosion by Streptococcus mutans.
Identifieur interne : 000305 ( Main/Exploration ); précédent : 000304; suivant : 000306Behavior of NiTi in the presence of oral bacteria: corrosion by Streptococcus mutans.
Auteurs : Loubna Bahije [Maroc] ; Hicham Benyahia ; Sakina El Hamzaoui ; Mohamed Ebn Touhami ; Rachid Bengueddour ; Wiam Rerhrhaye ; Faïza Abdallaoui ; Fatima ZaouiSource :
- International orthodontics [ 1879-680X ] ; 2011.
English descriptors
- KwdEn :
- Corrosion, Culture Media (chemistry), Dental Alloys (chemistry), Dental Plaque (microbiology), Dielectric Spectroscopy, Electric Impedance, Hydrogen-Ion Concentration, Materials Testing, Nickel (chemistry), Orthodontic Wires (microbiology), Saliva, Artificial (chemistry), Streptococcus mutans (chemistry), Streptococcus mutans (isolation & purification), Titanium (chemistry).
- MESH :
- chemical , chemistry : Culture Media, Dental Alloys, Nickel, Saliva, Artificial, Titanium.
- chemistry : Streptococcus mutans.
- isolation & purification : Streptococcus mutans.
- microbiology : Dental Plaque, Orthodontic Wires.
- Corrosion, Dielectric Spectroscopy, Electric Impedance, Hydrogen-Ion Concentration, Materials Testing.
Abstract
The aim of this study was to investigate the electrochemical behavior of nickel titanium (NiTi) orthodontic wires in a solution containing Streptococcus mutans oral bacteria. In this article, we explain our choice of bacterial species before describing the culture process in artificial saliva and the precautions needed to prevent contamination by other bacteria. The electrochemical behavior of the alloy (NiTi) was analyzed electrochemically in Ringer sterile artificial saliva and in artificial saliva enriched with a sterile broth and modified by addition of bacteria. The electrochemical procedures chosen for this study were: free corrosion potential, potentiodynamic curves and impedance spectroscopy. In this way, we were able to show that the free corrosion potential of the NiTi in the Ringer solution increases with time and then stabilizes, thus passivating the alloy. We also demonstrated that colonization of the metal surface by bacteria triggered a drop in the free corrosion potential. The electrochemical impedance findings revealed no significant difference in NiTi behavior between the two media. Finally, we observed a slight difference between the two corrosion currents in favor of the bacteria-enriched solution, in which the NiTi underwent greater corrosion. These findings demonstrate the impact of acidogenic bacteria on corrosion behavior of the NiTi wires investigated. However, further research is required, notably incorporating longer immersion times in the two media.
DOI: 10.1016/j.ortho.2010.12.001
PubMed: 21269899
Affiliations:
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Le document en format XML
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sort="Bahije, Loubna" uniqKey="Bahije L" first="Loubna" last="Bahije">Loubna Bahije</name><affiliation wicri:level="3"><nlm:affiliation>Faculté de médecine dentaire de Rabat, université Mohamed V Souissi, Rabat, Morocco. bahijeloubna@yahoo.fr</nlm:affiliation><country xml:lang="fr">Maroc</country><wicri:regionArea>Faculté de médecine dentaire de Rabat, université Mohamed V Souissi, Rabat</wicri:regionArea><placeName><settlement type="city">Rabat</settlement><region nuts="2">Rabat-Salé-Kénitra</region></placeName></affiliation></author><author><name sortKey="Benyahia, Hicham" sort="Benyahia, Hicham" uniqKey="Benyahia H" first="Hicham" last="Benyahia">Hicham Benyahia</name></author><author><name sortKey="El Hamzaoui, Sakina" sort="El Hamzaoui, Sakina" uniqKey="El Hamzaoui S" first="Sakina" last="El Hamzaoui">Sakina El Hamzaoui</name></author><author><name sortKey="Ebn Touhami, Mohamed" sort="Ebn Touhami, Mohamed" uniqKey="Ebn Touhami M" first="Mohamed" last="Ebn Touhami">Mohamed Ebn Touhami</name></author><author><name sortKey="Bengueddour, Rachid" sort="Bengueddour, Rachid" uniqKey="Bengueddour R" first="Rachid" last="Bengueddour">Rachid Bengueddour</name></author><author><name sortKey="Rerhrhaye, Wiam" sort="Rerhrhaye, Wiam" uniqKey="Rerhrhaye W" first="Wiam" last="Rerhrhaye">Wiam Rerhrhaye</name></author><author><name sortKey="Abdallaoui, Faiza" sort="Abdallaoui, Faiza" uniqKey="Abdallaoui F" first="Faïza" last="Abdallaoui">Faïza Abdallaoui</name></author><author><name sortKey="Zaoui, Fatima" sort="Zaoui, Fatima" uniqKey="Zaoui F" first="Fatima" last="Zaoui">Fatima Zaoui</name></author></analytic><series><title level="j">International orthodontics</title><idno type="eISSN">1879-680X</idno><imprint><date when="2011" type="published">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Corrosion</term><term>Culture Media (chemistry)</term><term>Dental Alloys (chemistry)</term><term>Dental Plaque (microbiology)</term><term>Dielectric Spectroscopy</term><term>Electric Impedance</term><term>Hydrogen-Ion Concentration</term><term>Materials Testing</term><term>Nickel (chemistry)</term><term>Orthodontic Wires (microbiology)</term><term>Saliva, Artificial (chemistry)</term><term>Streptococcus mutans (chemistry)</term><term>Streptococcus mutans (isolation & purification)</term><term>Titanium (chemistry)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Culture Media</term><term>Dental Alloys</term><term>Nickel</term><term>Saliva, Artificial</term><term>Titanium</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Streptococcus mutans</term></keywords><keywords scheme="MESH" qualifier="isolation & purification" xml:lang="en"><term>Streptococcus mutans</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Dental Plaque</term><term>Orthodontic Wires</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Corrosion</term><term>Dielectric Spectroscopy</term><term>Electric Impedance</term><term>Hydrogen-Ion Concentration</term><term>Materials Testing</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The aim of this study was to investigate the electrochemical behavior of nickel titanium (NiTi) orthodontic wires in a solution containing Streptococcus mutans oral bacteria. In this article, we explain our choice of bacterial species before describing the culture process in artificial saliva and the precautions needed to prevent contamination by other bacteria. The electrochemical behavior of the alloy (NiTi) was analyzed electrochemically in Ringer sterile artificial saliva and in artificial saliva enriched with a sterile broth and modified by addition of bacteria. The electrochemical procedures chosen for this study were: free corrosion potential, potentiodynamic curves and impedance spectroscopy. In this way, we were able to show that the free corrosion potential of the NiTi in the Ringer solution increases with time and then stabilizes, thus passivating the alloy. We also demonstrated that colonization of the metal surface by bacteria triggered a drop in the free corrosion potential. The electrochemical impedance findings revealed no significant difference in NiTi behavior between the two media. Finally, we observed a slight difference between the two corrosion currents in favor of the bacteria-enriched solution, in which the NiTi underwent greater corrosion. These findings demonstrate the impact of acidogenic bacteria on corrosion behavior of the NiTi wires investigated. However, further research is required, notably incorporating longer immersion times in the two media.</div></front></TEI><affiliations><list><country><li>Maroc</li></country><region><li>Rabat-Salé-Kénitra</li></region><settlement><li>Rabat</li></settlement></list><tree><noCountry><name sortKey="Abdallaoui, Faiza" sort="Abdallaoui, Faiza" uniqKey="Abdallaoui F" first="Faïza" last="Abdallaoui">Faïza Abdallaoui</name><name sortKey="Bengueddour, Rachid" sort="Bengueddour, Rachid" uniqKey="Bengueddour R" first="Rachid" last="Bengueddour">Rachid Bengueddour</name><name sortKey="Benyahia, Hicham" sort="Benyahia, Hicham" uniqKey="Benyahia H" first="Hicham" last="Benyahia">Hicham Benyahia</name><name sortKey="Ebn Touhami, Mohamed" sort="Ebn Touhami, Mohamed" uniqKey="Ebn Touhami M" first="Mohamed" last="Ebn Touhami">Mohamed Ebn Touhami</name><name sortKey="El Hamzaoui, Sakina" sort="El Hamzaoui, Sakina" uniqKey="El Hamzaoui S" first="Sakina" last="El Hamzaoui">Sakina El Hamzaoui</name><name sortKey="Rerhrhaye, Wiam" sort="Rerhrhaye, Wiam" uniqKey="Rerhrhaye W" first="Wiam" last="Rerhrhaye">Wiam Rerhrhaye</name><name sortKey="Zaoui, Fatima" sort="Zaoui, Fatima" uniqKey="Zaoui F" first="Fatima" last="Zaoui">Fatima Zaoui</name></noCountry><country name="Maroc"><region name="Rabat-Salé-Kénitra"><name sortKey="Bahije, Loubna" sort="Bahije, Loubna" uniqKey="Bahije L" first="Loubna" last="Bahije">Loubna Bahije</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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