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Micro-CT evaluation of voids using two root filling techniques in the placement of MTA in mesial root canals of Vertucci type II configuration

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Abstract

Objective

The present study aims to compare two mineral trioxide aggregate (MTA) placement techniques, manual compaction and ultrasonic activation of manually compacted MTA, with warm vertical compaction (WVC) for orthograde obturation of mesial root canals of mandibular first molars showing Vertucci type II root canal configuration.

Materials and methods

Thirty roots were selected according to their micro-CT scanned images. Root canals were chemomechanically prepared using Reciproc R25 and NaOCl using EndoVac. The specimens were divided into three groups according to the root canal filling technique, as manual compaction of MTA, ultrasonic activation of manually compacted MTA and WVC using gutta-percha and AH Plus (Denstply Sirona, Ballaigues, Switzerland). Percentages of voids located in apical 3 mm and remaining coronal half until the level where separate root canals re-join within filling were calculated. Data were analyzed using the Kruskal-Wallis and Dunn’s tests, and significance was set at 5%.

Results

No significant difference was found among the filling techniques regarding the percentage volume of voids at apical 3 mm (P > 0.05). At the coronal half of the isthmus, WVC produced significantly less percentage volume of voids than manual compaction of MTA (P < 0.05) and similar to ultrasonic activation group did (P > 0.05). There was no significant difference between two MTA placement techniques at the coronal half of the isthmus (P > 0.05).

Conclusions

No filling technique produced void-free fillings. The percentage of void volume was similar among groups at apical 3 mm but was different at the coronal half of the isthmus.

Clinical relevance

Warm vertical compaction and ultrasonically activated MTA fillings revealed similar quality at the isthmus area, which was superior to manually compacted MTA.

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Funding

This study was supported by the Scientific and Technological Research Council of Turkey-TUBİTAK (grant no. 114S002).

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Authors and Affiliations

  1. Department of Endodontics, Faculty of Dentistry, Ondokuz Mayıs University, Samsun, Turkey

    Ali Keleş, Cangül Keskin & İsmail Uzun

  2. Loma Linda University School of Dentistry, Loma Linda, CA, USA

    Mahmoud Torabinejad & Dongjin Sah

  3. Private Practice, Ankara, Turkey

    Hatice Alçin

Authors
  1. Ali Keleş
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  2. Mahmoud Torabinejad
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  3. Cangül Keskin
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  4. Dongjin Sah
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  5. İsmail Uzun
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  6. Hatice Alçin
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Corresponding author

Correspondence to Ali Keleş.

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Conflict of interest

The authors declare that they have no competing interests.

Ethical approval

The study was approved by the medical faculty review board of Inonu University, Malatya, Turkey.

Informed consent

For this type of study, informed consent was required. Thus, informed consent was obtained from all individual participants included to the study.

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Keleş, A., Torabinejad, M., Keskin, C. et al. Micro-CT evaluation of voids using two root filling techniques in the placement of MTA in mesial root canals of Vertucci type II configuration. Clin Oral Invest 22, 1907–1913 (2018). https://doi.org/10.1007/s00784-017-2282-0

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  • DOI: https://doi.org/10.1007/s00784-017-2282-0

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