Oral Radiology

, Volume 34, Issue 2, pp 143–150 | Cite as

Root and canal morphology of mandibular premolars using cone-beam computed tomography in a Chilean and Belgian subpopulation: a cross-sectional study

  • Eugenia Pedemonte
  • Carolina Cabrera
  • Andrés Torres
  • Reinhilde Jacobs
  • Alexandra Harnisch
  • Valeria Ramírez
  • Guillermo Concha
  • Andrés Briner
  • Claudia Brizuela
Original Article



To describe mandibular premolar root and canal morphology and its variability in Chilean and Belgian samples using cone-beam computed tomography.


A cross-sectional and descriptive study was conducted. A total of 402 mandibular premolars were examined using cone-beam computed tomography images of Chilean and Belgian patients. Premolars that met the inclusion criteria were studied in relation to the number of roots, number of canals, root canal configuration, presence of C-shaped configuration, tooth length, and root length.


The mandibular first premolar frequently presented with one root (94% Chilean; 100% Belgian), as did the mandibular second premolar (99% Chilean; 98% Belgian). One canal was present in 69% of Chilean, and 83% of Belgian mandibular first premolars, and in 95% of Chilean and 91% of Belgian second premolars. A type I root canal configuration was found in 69% of Chilean and 83% of Belgian first premolars and in 95% of Chilean and 92% of Belgian second premolars.


The anatomical parameters analyzed in the Chilean and Belgian samples are similar. However, it should be noted that there are anatomical variations in mandibular premolars.


Anatomy Cone-beam computed tomography Dental pulp cavity Premolar Root canal 


Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflicts of interest.

Human rights statements and informed consent

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions. Informed consent was obtained from all patients for being included in the study.


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Copyright information

© Japanese Society for Oral and Maxillofacial Radiology and Springer Japan KK 2017

Authors and Affiliations

  • Eugenia Pedemonte
    • 1
  • Carolina Cabrera
    • 1
  • Andrés Torres
    • 2
  • Reinhilde Jacobs
    • 2
  • Alexandra Harnisch
    • 1
  • Valeria Ramírez
    • 1
  • Guillermo Concha
    • 1
  • Andrés Briner
    • 1
  • Claudia Brizuela
    • 1
  1. 1.Department of EndodonticsUniversidad de los Andes, Facultad de Odontología. MonsLas CondesChile
  2. 2.Department of Imaging and PathologyUniversity of LeuvenLouvainBelgium

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