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Cutting efficiency of heat‐treated nickel–titanium single‐file systems at different incidence angles
Author(s) -
Pedullà Eugenio,
La Paglia Pietro,
La Rosa Giusy Rita Maria,
Gueli Anna Maria,
Pasquale Stefania,
Jaramillo David E.,
Forner Leopoldo,
Lo Savio Fabio,
La Rosa Guido,
Rapisarda Ernesto
Publication year - 2021
Publication title -
australian endodontic journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.703
H-Index - 34
eISSN - 1747-4477
pISSN - 1329-1947
DOI - 10.1111/aej.12462
Subject(s) - reciprocating motion , bonferroni correction , calipers , mathematics , significant difference , block (permutation group theory) , orthodontics , materials science , dentistry , statistics , engineering , mechanical engineering , medicine , geometry , gas compressor
Cutting efficiency of Reciproc R25 (REC) and Reciproc blue R25 (REB) at different inclinations was evaluated. Sixty new files were tested at 90°, 70° and 45° of inclination in relation to the sample ( n = 10), using a customised machine. All files were activated in reciprocation against standardised gypsum blocks for 120 s. Cutting efficiency was determined by measuring the block weight loss with an analytical balance and measuring the length of the block surface cut using a digital calliper. Data were statistically analysed (two‐way ANOVA, Bonferroni t‐test) with the significance level set at P < 0.05. There was no difference for REC among the tested angles. REB had no statistical difference between 90° and 70°; however, its cutting efficiency significantly increased at 45°. There was a significant difference between REC and REB at 45° only. Under these conditions, increased file inclination to 45° and blue heat treatment improved cutting efficiency of reciprocating files.