3D Micro-CT Analysis of Void and Gap Formation in Curved Root Canals

N. Şimşek, A. Keleş, F. Ahmetoğlu, L. Akinci, K. Er

European Endodontic Journal. 2017; 2:22-27


OBJECTIVE: This study used microcomputed tomography (micro-CT) to compare the volumes of voids and gaps in curved root canals instrumented and filled using various techniques.

METHODS: Twenty extracted mandibular first molars with two curved mesial root canals were used. Root canals were instrumented using a self-adjusting file (SAF) or Revo-S file system. For standardization, mesio- buccal canals were instrumented with SAF and mesiolingual canals were instrumented with Revo-S in each root. The canals were divided into four experimental groups (n=10 in each). The canals were then filled via cold lateral compaction (CLC) or a thermoplasticized injectable technique (TT) using gutta-percha and AH Plus root canal sealer. The roots were scanned with a micro-CT, and the volumes of the voids and gaps were calculated using three-dimensional (3D) micro-CT images. Data were analyzed using unpaired t- and Krus- kal-Wallis tests. A value of P < 0.05 was considered significant.Results: None of the tested techniques provided void- or gap-free fillings. Nevertheless, the SAF showed more gap formation than the Revo-S, and TT showed higher gap formation in all experimental groups. These differences, however, were not statistically significant (p>0.05).

CONCLUSION: The SAF and Revo-S rotary file systems yielded comparable results. No statistically significant difference was found between the results of the various instrumentation and filling techniques.


The full article is available online: European Endodontic Journal

simsek obturation eej 2017


Additional Info

  • ReDent Nova’s note:

    This research only examined the gaps in the filling, and did not take into account the debris-packed areas, as was done in previous researches (De Deus et al., J Endod 2013). Such packed debris is potentially infected, and has higher potential damage than the cement-filled gaps in the obturation itself.

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