Premium
Incidence of microcracks after preparation of straight and curved root canals with three different NiTi instrumentation techniques assessed by micro‐ CT
Author(s) -
Rödig Tina,
Krämer Juliane,
Müller Christine,
Wiegand Annette,
Haupt Franziska,
Rizk Marta
Publication year - 2019
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.12339
Subject(s) - nickel titanium , materials science , molar , root canal , dentistry , instrumentation (computer programming) , dental instruments , orthodontics , composite material , medicine , shape memory alloy , computer science , operating system
This study evaluated the effect of three different NiTi instrumentation techniques on the incidence of microcracks after the preparation of straight and curved root canals using micro‐ CT . Roots from mandibular premolars and maxillary molars ( n = 66) with the same mean canal curvatures were assigned to three groups of straight and three groups of curved roots ( n = 11). After preoperative micro‐ CT scans, root canals were prepared with Reciproc, OneShape and ProTaper Next to size 25. Specimens were scanned again, and pre‐ and post‐operative cross‐sectional images ( n = 75 263) were screened to identify the presence of dentinal microcracks. Overall, microcracks were detected in 2.97% ( n = 2236) of the cross‐sectional images. No new dentinal microcracks were observed after root canal instrumentation of straight and curved canals with the tested NiTi systems. Instrumentation with Reciproc, OneShape and ProTaper Next did not induce the formation of dentinal microcracks irrespective of canal curvature.