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Micro‐CT assessment of the shaping ability of four root canal instrumentation systems in oval‐shaped canals
Author(s) -
Zuolo M. L.,
Zaia A. A.,
Belladonna F. G.,
Silva E. J. N. L.,
Souza E. M.,
Versiani M. A.,
Lopes R. T.,
DeDeus G.
Publication year - 2018
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.12810
Subject(s) - root canal , dentistry , computed tomographic , significant difference , orthodontics , adobe photoshop , hard tissue , instrumentation (computer programming) , dentin , materials science , computed tomography , mathematics , medicine , computer science , surgery , statistics , software , programming language , operating system
Aim To compare the shaping ability of four root canal instrumentation systems in oval‐shaped canals using micro‐computed tomographic analysis. Methodology Forty anatomically matched mandibular incisors were scanned and assigned to four groups ( n = 10), according to the canal preparation protocol: BioRace, Reciproc, Self‐Adjusting File ( SAF ) and TRUS hape systems. After canal instrumentation, the specimens were rescanned, and the registered pre‐ and postoperative datasets were examined to evaluate the percentages of accumulated hard‐tissue debris, untouched canal walls and dentine removed. Kruskal–Wallis and Mann–Whitney U ‐tests with Bonferroni correction were used to compare the variables in the groups (α = 5%). Results The preparation techniques did not affect the percentage of accumulated hard‐tissue debris ( P = 0.126). The percentage of untouched canal areas was significantly higher for BioRace (32.38%)compared to Reciproc (18.95%) and SAF (16.08%) systems (P < 0.05). Reciproc removed significantly more dentine (4.18%) than BioRace (2.21%) and SAF (2.56%) ( P < 0.05). The TRUS hape system had intermediate results for both untouched canal walls (19.20%) and dentine removed (3.77%), with no significant difference compared to BioRace, Reciproc and SAF systems. Conclusions The preparation techniques resulted in the same level of accumulated hard‐tissue debris. Compared to the other tested systems, BioRace was associated with more untouched canal walls and Reciproc produced the greatest amount of removed dentine. Although it touched more of the root canal walls, the SAF system removed less dentine, whereas TRUS hape had intermediate results for these same parameters. None of the systems tested were able to provide optimal shaping ability in oval‐shaped canals.