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Enhancement of NiTi superelastic endodontic instruments by TiO2 coating
Diego Pinheiro Aun1, Isabella Faria da Cunha Peixoto1, Manuel Houmard2
1Department of Metallurgical and Materials Engineering, Universidade Federal de Minas Gerais, Av. Antonio Carlos, 6627, Campus Pampulha, 31270-901 Belo Horizonte, MG, Brazil.
Abstract:
Rotary nickel-titanium (NiTi) endodontic instruments were coated with a nanometric flexible TiO2 layer through dip-coating sol-gel. Control groups and coated samples of superelastic NiTi instruments model RaCe 25/0.06 (0.25mm tip-diameter, 6% conicity) were comparatively investigated with respect to the cutting efficiency, fatigue life, and corrosion resistance. Results showed an improvement in cutting efficiency for the coated samples and a high resistance to corrosion in NaClO. The coated instruments showed a better performance in fatigue life after corrosion.

