Physical properties of modern reciprocal endodontic systems and fatigue failure testing in simulated clinical conditions

0551283 - FZÚ 2022 RIV CH eng J - Journal Article
Jusku, A. - Tomáštík, Jan - Václavek, Lukáš - Jirásek, P. - Harvan, L. - Holík, P. - Čtvrtlík, Radim
Physical properties of modern reciprocal endodontic systems and fatigue failure testing in simulated clinical conditions.
Applied Sciences-Basel. Roč. 11, č. 23 (2021), č. článku 11160. E-ISSN 2076-3417
R&D Projects: GA TA ČR TN01000038
Institutional support: RVO:68378271
Keywords : cyclic fatigue * endodontic instruments * nanoindentation * roughness
OECD category: Dentistry, oral surgery and medicine
Impact factor: 2.838, year: 2021
Method of publishing: Open access

Instrument fracture ranks among the most crucial complications during the endodontic treatment of a tooth. In order to better understand the practical limits of the instrument, the relation between the cyclic fatigue resistance and physical properties such as hardness, modulus of elasticity, creep and surface roughness were explored. Cyclic fatigue testing in an artificial root canal at intracanal temperature, nanoindentation and 3D microscopy were used for evaluation of four commonly used thermomechanically treated NiTi endodontic instruments (Unicone Plus 6/025, Unicone 6/025, Reciproc Blue R25 and WaveOne Gold Primary). Cyclic fatigue results were analyzed using the Kruskal–Wallis, Mann–Whitney and Bonferroni corrections. The wear resistance of Unicone 6/025 instruments was significantly lower compared to all other instruments (p [removed] 0.05).

Permanent Link: http://hdl.handle.net/11104/0326713