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The effect of different obturation methods on sealer penetration alongside apically separated rotary nickel–titanium instruments: A confocal laser scanning microscopy study
Author(s) -
Aktemur Türker Sevinç,
Uzunoğlu Özyürek Emel,
Tek Vildan
Publication year - 2020
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/jemt.23461
Subject(s) - penetration (warfare) , materials science , stereo microscope , confocal laser scanning microscopy , confocal , confocal laser scanning microscope , penetration depth , dentistry , nickel titanium , microscope , biomedical engineering , composite material , optics , medicine , mathematics , geometry , physics , operations research , shape memory alloy
The effects of different obturation techniques on calcium silicate‐based sealer penetration in the presence of apically separated rotary files were evaluated. Forty‐eight extracted mandibular incisors were used. ProTaper F2 rotary files were separated at the apical thirds. Samples were divided into four groups ( n = 12) according to obturation technique used: (a) cold lateral compaction (CLC); (b) single cone; (c) bulk‐fill (BF) without a core material; and (d) thermoplastic injection (TI). Specimens were sectioned horizontally at 1 and 3 mm from the apex and studied using a confocal scanning laser microscope. The maximum tubule penetration depth and percentage of penetration were measured. Data were statistically analyzed using parametric and nonparametric tests with a significance level of 5%. Regarding penetration depth, a significant difference was found at 1 mm ( p < .05), while no significant difference was found at 3 mm ( p > .05). At the 3 mm level, all of the obturation techniques showed similar penetration depths. Regarding penetration percentage, the values of the CLC and TI groups were statistically less when compared with the BF group at 1 and 3 mm levels, respectively ( p < .05). Under the limitations of this in vitro study, results suggest that the obturation technique may present a significant effect on sealer penetration.