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2022, vol. 150, br. 5-6, str. 254-260
Uticaj natrijum-hipohlorita na pojavu korozije rotirajućih Ni-Ti instrumenata - SEM analiza
aUniverzitet u Beogradu, Stomatološki fakultet, Klinika za bolesti zuba i endodonciju
bUniverzitet u Beogradu, Stomatološki fakultet

e-adresamedojevic.milica@gmail.com
Ključne reči: korozija; rotirajući Ni-Ti instrumenti; skenirajuća elektronska mikroskopija (SEM)
Sažetak
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.
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O članku

jezik rada: engleski
vrsta rada: originalan članak
DOI: 10.2298/SARH210321035J
primljen: 21.03.2021.
revidiran: 27.03.2022.
prihvaćen: 29.03.2022.
objavljen onlajn: 01.04.2022.
objavljen u SCIndeksu: 08.07.2022.
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