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Micro‐ CT assessment of dentinal micro‐cracks after root canal filling procedures
Author(s) -
DeDeus G.,
Belladonna F. G.,
Silva E. J. N. L.,
Souza E. M.,
Carvalhal J. C. A.,
Perez R.,
Lopes R. T.,
Versiani M. A.
Publication year - 2017
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.12706
Subject(s) - molar , root canal , materials science , dentinal tubule , dentistry , compaction , computed tomographic , computed tomography , orthodontics , composite material , dentin , medicine , radiology
Aim To evaluate the frequency of dentinal micro‐cracks after root canal filling procedures with GuttaCore (GC), cold lateral compaction (CLC) and warm vertical compaction (WVC) techniques in mandibular molars using micro‐computed tomographic analysis. Methodology Thirty mesial roots of mandibular molars, with a type II Vertucci's canal configuration, were prepared to working length with a Reciproc R40 instrument and randomly assigned to one of the three experimental groups ( n = 10), according to the technique used for root filling: GC, CLC or WVC. The GC group was filled with a size 40 GC obturator, whilst CLC and WVC groups used conventional gutta‐percha cones. AH Plus sealer was used in all groups. The specimens were scanned at an isotropic resolution of 14.25 μm before and after root canal preparation and after root filling. Then, all pre‐ and postoperative cross‐sectional images of the roots ( n = 41 660) were screened to identify the presence of dentinal defects. Results Overall, 30.75% ( n = 12 810) of the pre‐ + post‐filling images displayed dentinal defects. In the GC, CLC and WVC groups, dentinal micro‐cracks were observed in 18.68% ( n = 2510), 15.99% ( n = 2389) and 11.34% ( n = 1506) of the cross‐sectional images, respectively. All micro‐cracks identified in the post‐filling scans were also observed in the corresponding post‐preparation images. Conclusion Root fillings in all techniques did not induce the development of new dentinal micro‐cracks.