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Original Research

Open Access

Micro-computed tomography (micro-CT) evaluation of root canal morphology in immature maxillary third molars

  • Krasimir Hristov1,*,
  • Ralitsa Gigova1
  • Nataliya Gateva1
  • Liliya Angelova2

1Department of Pediatric Dentistry, Faculty of Dental Medicine, Medical University of Sofia, 1431 Sofia, Bulgaria

2Department of Dental Public Health, Faculty of Dental Medicine, Medical University of Sofia, 1431 Sofia, Bulgaria

DOI: 10.22514/jocpd.2024.067 Vol.48,Issue 3,May 2024 pp.139-145

Submitted: 15 August 2023 Accepted: 26 September 2023

Published: 03 May 2024

*Corresponding Author(s): Krasimir Hristov E-mail:


The endodontic treatment of immature permanent teeth with necrotic pulp is a significant clinical challenge. The success of regenerative endodontic procedure is highly dependent on disinfection of the root canal and an accurate anatomical knowledge of the root canal. The aim of this study was to use micro-computed tomography (micro-CT) analysis to investigate the configuration of root canals in the upper permanent third maxillary molars with incomplete root development in their coronal, apical and middle third portions. Thirty immature third permanent maxillary molars were scanned using a micro-CT system. Then, we measured the diameters and areas of the root canal in the coronal, middle and apical third of the roots. The ratio between the long and short diameter of each root canal was then calculated and the canals were divided into several groups: round, oval, long oval, flat and irregular. The round configuration was not observed in the distobuccal and mesiobuccal roots in any of their anatomical regions. Oval and long oval canals predominated in the distobuccal root. The greatest variations were observed in the mesiobuccal root, with the ribbon-shaped canal predominating in the middle region and an irregular shape in the apical region. In the coronal region of the palatal canal, the round configuration predominated; in the middle third, we observed an almost equivalent distribution between round and oval configurations; apically, the oval shape predominated. In conclusion, we observed significant complexity and variation in the morphology and configuration of root canals in immature permanent molars, thus generating additional obstacles for the success of regenerative endodontics.


Immature permanent teeth; Canal anatomy; Regenerative endodontics; Apexification

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Krasimir Hristov,Ralitsa Gigova,Nataliya Gateva,Liliya Angelova. Micro-computed tomography (micro-CT) evaluation of root canal morphology in immature maxillary third molars. Journal of Clinical Pediatric Dentistry. 2024. 48(3);139-145.


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