Nešković, Jelena

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Effects of sodium hypochlorite on corrosion of the rotary nickel-titanium endodontic instruments - SEM analysis

Jovanović-Medojević, Milica; Nešković, Jelena; Popović-Bajić, Marijana; Stratimirović, Đorđe; Živković, Slavoljub

(Srpsko lekarsko društvo, Beograd, 2022) 

TY  - JOUR
AU  - Jovanović-Medojević, Milica
AU  - Nešković, Jelena
AU  - Popović-Bajić, Marijana
AU  - Stratimirović, Đorđe
AU  - Živković, Slavoljub
PY  - 2022
UR  - https://smile.stomf.bg.ac.rs/handle/123456789/3269
AB  - Introduction/Objective of this study is to use scanning electron microscopy (SEM) analysis to examine surfaces of new and same sets of Ni-Ti instruments after canal preparations, to check their suspectability to corrosion. Methods In this study, we used five different endodontic Ni-Ti instruments: K3, Mtwo, ProTaper Universal, HyFlex and BioRaCe. Instruments were analyzed before and after preparation of canals of different curvature, using SEM (150-2000 ×). Results Corrosion of the working part was observed in 5.5% of new Ni-Ti instruments of the K3 system (apical and middle segment), in 5.5% of Mtwo instruments (apical third), and in 11.1% of ProTaper Universal systems (apical and middle third). Corrosion was not observed on the new instruments of the HyFlex and BioRaCe kits. After instrumentation, disinfection, and sterilization, corrosion was observed in all sets of K3 and ProTaper Universal systems and in all HyFlex instruments of the first group. Corrosion was observed in the HyFlex system in the second group in 16.7% of instruments (apical and middle third) and in the third 83.3% in the apical and 66.7% in the middle segment. In the Mtwo set, corrosion was observed in 16.7% of instruments in the first (apical and middle third), in the second group in 33.3% of instruments in the apical part and 50% in the middle third, while in the third group, corrosion was observed in 16.7% of instruments in the middle third of instruments. Conclusion Rotary Ni-Ti instruments K3 and ProTaper Universal are susceptible to corrosion in a very high percentage. Ni-Ti systems with post-heat treatment of the working part (HyFlex) are somewhat more resistant to corrosion, while in Ni-Ti systems with electropolished surface (BioRaCe), corrosion is not observed.
AB  - Uvod/Cilj Cilj istraživanja je bio da se primenom skenirajuće elektronske mikroskopije (SEM) analiziraju površine nekorišćenih i istih setova nikl-titanijmskih (Ni-Ti) rotirajućih instrumenata nakon preparacije kanala, odnosno da se proveri njihova podložnost za pojavu korozije. Metod U istraživanje je uključeno pet različitih setova mašinskih endodontskih Ni-Ti instrumenata: K3, Mtwo, ProTaper Universal, HyFlex i BioRaCe. Instrumenti su analizirani pre upotrebe i nakon preparacije kanala različite povijenosti, pomoću SEM-a (150-2000 ×). Svaki set instrumenata je korišćen za obradu 10 kanala u tri eksperimentalne grupe (pravi, blago i izrazito povijeni kanali). Rezultati Korozija radnog dela uočena je kod 5,5% novih Ni-Ti instrumenata sistema K3 (apikalni i srednji segment), kod 5,5% Mtwo instrumenta (apikalna trećina) i kod 11,1% sistema ProTaper Universal (apikalna i srednja trećina). Korozija nije uočena na novim instrumentima HyFlex i BioRaCe setova. Nakon instrumentacije, dezinfekcije i sterilizacije korozija je primećena kod svih setova sistema K3 i ProTaper Universal i kod svih HyFlex instrumenata prve grupe. Korozija je uočena kod HyFlex sistema u drugoj grupi kod 16,7% instrumenata (apikalna i srednja trećina), a u trećoj grupi kod 83,3% instrumenata u apikalnom i 66,7% u srednjem segmentu. Kod Mtwo seta korozija je uočena kod 16,7% instrumenata u prvoj grupi (apikalna i srednja trećina), u drugoj grupi kod 33,3% instrumenata u apikalnom delu i 50% u srednjoj trećini, dok je u trećoj grupi korozija primećena kod 16,7% instrumenata u srednjoj trećini instrumenata. Zaključak Rotirajući Ni-Ti instrumenti K3 i ProTaper Universal podložni su koroziji u veoma visokom procentu. Ni-Ti sistemi sa naknadnom termičkom obradom radnog dela (HyFlex) nešto su otporniji na koroziju, dok kod Ni-Ti sistema sa elektropoliranom površinom (BioRaCe) korizija nije uočena.
PB  - Srpsko lekarsko društvo, Beograd
T2  - Srpski arhiv za celokupno lekarstvo
T1  - Effects of sodium hypochlorite on corrosion of the rotary nickel-titanium endodontic instruments - SEM analysis
T1  - Uticaj natrijum-hipohlorita na pojavu korozije rotirajućih Ni-Ti instrumenata - SEM analiza
VL  - 150
IS  - 5-6
SP  - 254
EP  - 260
DO  - 10.2298/SARH210321035J
ER  - 
@article{
author = "Jovanović-Medojević, Milica and Nešković, Jelena and Popović-Bajić, Marijana and Stratimirović, Đorđe and Živković, Slavoljub",
year = "2022",
abstract = "Introduction/Objective of this study is to use scanning electron microscopy (SEM) analysis to examine surfaces of new and same sets of Ni-Ti instruments after canal preparations, to check their suspectability to corrosion. Methods In this study, we used five different endodontic Ni-Ti instruments: K3, Mtwo, ProTaper Universal, HyFlex and BioRaCe. Instruments were analyzed before and after preparation of canals of different curvature, using SEM (150-2000 ×). Results Corrosion of the working part was observed in 5.5% of new Ni-Ti instruments of the K3 system (apical and middle segment), in 5.5% of Mtwo instruments (apical third), and in 11.1% of ProTaper Universal systems (apical and middle third). Corrosion was not observed on the new instruments of the HyFlex and BioRaCe kits. After instrumentation, disinfection, and sterilization, corrosion was observed in all sets of K3 and ProTaper Universal systems and in all HyFlex instruments of the first group. Corrosion was observed in the HyFlex system in the second group in 16.7% of instruments (apical and middle third) and in the third 83.3% in the apical and 66.7% in the middle segment. In the Mtwo set, corrosion was observed in 16.7% of instruments in the first (apical and middle third), in the second group in 33.3% of instruments in the apical part and 50% in the middle third, while in the third group, corrosion was observed in 16.7% of instruments in the middle third of instruments. Conclusion Rotary Ni-Ti instruments K3 and ProTaper Universal are susceptible to corrosion in a very high percentage. Ni-Ti systems with post-heat treatment of the working part (HyFlex) are somewhat more resistant to corrosion, while in Ni-Ti systems with electropolished surface (BioRaCe), corrosion is not observed., Uvod/Cilj Cilj istraživanja je bio da se primenom skenirajuće elektronske mikroskopije (SEM) analiziraju površine nekorišćenih i istih setova nikl-titanijmskih (Ni-Ti) rotirajućih instrumenata nakon preparacije kanala, odnosno da se proveri njihova podložnost za pojavu korozije. Metod U istraživanje je uključeno pet različitih setova mašinskih endodontskih Ni-Ti instrumenata: K3, Mtwo, ProTaper Universal, HyFlex i BioRaCe. Instrumenti su analizirani pre upotrebe i nakon preparacije kanala različite povijenosti, pomoću SEM-a (150-2000 ×). Svaki set instrumenata je korišćen za obradu 10 kanala u tri eksperimentalne grupe (pravi, blago i izrazito povijeni kanali). Rezultati Korozija radnog dela uočena je kod 5,5% novih Ni-Ti instrumenata sistema K3 (apikalni i srednji segment), kod 5,5% Mtwo instrumenta (apikalna trećina) i kod 11,1% sistema ProTaper Universal (apikalna i srednja trećina). Korozija nije uočena na novim instrumentima HyFlex i BioRaCe setova. Nakon instrumentacije, dezinfekcije i sterilizacije korozija je primećena kod svih setova sistema K3 i ProTaper Universal i kod svih HyFlex instrumenata prve grupe. Korozija je uočena kod HyFlex sistema u drugoj grupi kod 16,7% instrumenata (apikalna i srednja trećina), a u trećoj grupi kod 83,3% instrumenata u apikalnom i 66,7% u srednjem segmentu. Kod Mtwo seta korozija je uočena kod 16,7% instrumenata u prvoj grupi (apikalna i srednja trećina), u drugoj grupi kod 33,3% instrumenata u apikalnom delu i 50% u srednjoj trećini, dok je u trećoj grupi korozija primećena kod 16,7% instrumenata u srednjoj trećini instrumenata. Zaključak Rotirajući Ni-Ti instrumenti K3 i ProTaper Universal podložni su koroziji u veoma visokom procentu. Ni-Ti sistemi sa naknadnom termičkom obradom radnog dela (HyFlex) nešto su otporniji na koroziju, dok kod Ni-Ti sistema sa elektropoliranom površinom (BioRaCe) korizija nije uočena.",
publisher = "Srpsko lekarsko društvo, Beograd",
journal = "Srpski arhiv za celokupno lekarstvo",
title = "Effects of sodium hypochlorite on corrosion of the rotary nickel-titanium endodontic instruments - SEM analysis, Uticaj natrijum-hipohlorita na pojavu korozije rotirajućih Ni-Ti instrumenata - SEM analiza",
volume = "150",
number = "5-6",
pages = "254-260",
doi = "10.2298/SARH210321035J"
}
Jovanović-Medojević, M., Nešković, J., Popović-Bajić, M., Stratimirović, Đ.,& Živković, S.. (2022). Effects of sodium hypochlorite on corrosion of the rotary nickel-titanium endodontic instruments - SEM analysis. in Srpski arhiv za celokupno lekarstvo
Srpsko lekarsko društvo, Beograd., 150(5-6), 254-260.
https://doi.org/10.2298/SARH210321035J
Jovanović-Medojević M, Nešković J, Popović-Bajić M, Stratimirović Đ, Živković S. Effects of sodium hypochlorite on corrosion of the rotary nickel-titanium endodontic instruments - SEM analysis. in Srpski arhiv za celokupno lekarstvo. 2022;150(5-6):254-260.
doi:10.2298/SARH210321035J .
Jovanović-Medojević, Milica, Nešković, Jelena, Popović-Bajić, Marijana, Stratimirović, Đorđe, Živković, Slavoljub, "Effects of sodium hypochlorite on corrosion of the rotary nickel-titanium endodontic instruments - SEM analysis" in Srpski arhiv za celokupno lekarstvo, 150, no. 5-6 (2022):254-260,
https://doi.org/10.2298/SARH210321035J . .