On the wear inspection and endurance recovery of Nitinol endodontic files

• Autorzy: Hryniewicz T. , Rokosz K.

Warianty tytułu

PL

Kontrola zużycia i poprawa jakości nitinolowych wierteł endodontycznych

• Języki publikacji: EN

Abstrakty

EN

The aim of this study was to reveal the effects of operation of endodontic rotary files during a normal use and the possibilities for their endurance recovery. The effect of magnetoelectropolishing on the basic surface, and mechanical properties of Nitinol endodontic rotary files has been also studied. The investigation covered surface interferometry measurements, and SEM studies referred to two groups of endodontic instruments: ready-to-use and/or as-received (AR) tools, and magnetoelectropolished (MEP) instruments, meaning treated by electropolishing in a magnetic field. Overall, magnetoelectropolished (MEP) instruments indicated significantly better surface characteristics than those as-received (AR). Our earlier studies have revealed several better and improved surface characteristics of Nitinol samples treated with MEP in comparison with those electropolished under standard EP conditions and as-received (AR) ones. Specifically it has been found that magnetoelectropolishing MEP process may improve the surface, corrosion, and fatigue characteristics of Nitinol samples. When viewing the as-received (AR) instruments with SEM, and measuring the instrument treated surface by interferometry, the evidences of milling grooves, cracks, pits, and metal rollover were observed, contrary to the endodontic file surface after magnetoelectropolishing (MEP). The MEP process has improved most of surface characteristics, having beneficial effects in prolonging the fatigue life of samples. The benefits of MEP process are likely to be caused by a reduction in surface irregularities and essential changes in surface film properties.

PL

W pracy ukazano warunki pracy i sposoby zużycia nitinolowych narzędzi endodontycznych oraz możliwości poprawy ich trwałości / jakości. Badania obejmowały SEM i interferometrię narzędzi uszkodzonych w procesie powiększania kanału zębnego, oraz narzędzi po magnetoelektropolerowaniu (MEP). Zużycie narzędzi następuje głównie w wyniku zmęczenia materiału i zależy od ukształtowania kanału zębnego. Wstępne badania wykazują, że proces MEP, poprzez zmiany w warstwie wierzchniej, poprawia mechaniczne właściwości Nitinolu.

Słowa kluczowe

EN

Endodontic rotary files; nitinol; magnetoelectropolishing; SEM; interferometry

PL

wiertła endodontyczne; nitinol; magnetoelektropolerowanie; SEM; interferometria

• Wydawca: Wydawnictwo PAK
• Czasopismo: Pomiary Automatyka Kontrola
• Rocznik: 2009
• Tom: R. 55, nr 4
• Strony: 247--250
• Opis fizyczny: Bibliogr. 24 poz., rys.

Twórcy

autor

Hryniewicz T.

autor

Rokosz K.

• Wydział Mechaniczny, Politechnika Koszalińska,

Bibliografia

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