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Cutting efficiency of conventional and heat‐treated nickel–titanium rotary or reciprocating glide path instruments
Author(s) -
Pedullà E.,
Leanza G.,
La Rosa G. R. M.,
Gueli A. M.,
Pasquale S.,
Plotino G.,
Rapisarda E.
Publication year - 2020
Publication title -
international endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.988
H-Index - 119
eISSN - 1365-2591
pISSN - 0143-2885
DOI - 10.1111/iej.13224
Subject(s) - reciprocating motion , nickel titanium , materials science , mathematics , orthodontics , metallurgy , mechanical engineering , medicine , engineering , shape memory alloy , gas compressor
Aim To compare the cutting efficiency of several glide path files: HyFlex EDM Glidepath File ( HEGF ), One G ( OG ), R‐Pilot ( RP ) and WaveOne Gold Glider ( WOGG ) at different cutting inclinations. Methodology Cutting efficiency of 120 new HEGF , OG , RP and WOGG was tested at 90°, 70° and 45° inclination in relation to the sample. Depending on manufacturer instructions, instruments were tested in continuous rotation or reciprocating motion against standardized gypsum samples for 120 s using a customized apparatus. Cutting efficiency was determined by measuring the weight loss and the length of the sample cut. Data were analysed using two‐way analysis of variance and Tukey t ‐test ( P < 0.05). Results RP and WOGG had greater cutting ability than HEGF and OG in all tested angles. RP tested at 45° had significantly greater cutting efficiency than when tested at 90° and 70° ( P < 0.05). OG was not significantly different in terms of cutting ability at 90°, 70° and 45° ( P > 0.05). HEGF and WOGG had significantly greater cutting efficiency at 45° and 70° compared to 90° ( P < 0.05), with no significant difference between 45° and 70° ( P > 0.05). RP had the greatest cutting ability at all tested angles. Conclusions Reciprocating glide path instruments had greater cutting efficiency compared to those in continuous rotation. An inclined insertion (45° or 70°) increased the cutting ability of glide path files except for One G conventional NiTi files.