Dental CT evaluation of mandibular first premolar root configurations and canal variations

Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2002 Mar;93(3):328-32. doi: 10.1067/moe.2002.120055.

Abstract

Objectives: Routine dental CT scans were used to describe mandibular first premolar root configurations and canal variations.

Study design: One hundred twenty dental CT examinations were evaluated for mandibular first premolar root configurations and canal variations regarding shape of root and root canal, incidence of multiple canals, and level of bifurcation.

Results: A total of 17 teeth in 12 patients showed mesial invagination of the root of the mandibular first premolar. One root displayed 3 canals with 3 apical foramina. In 2 teeth, a single canal divided into 2 canals, but merged into 1 apical foramen. One root showing 2 root canals finally divided into 2 roots near the apex. Thirteen roots had 2 canals and 2 apical foramina. The distance from the cementoenamel junction to the level of bifurcation was between 4 and 13 mm (mean, 7.4 mm).

Conclusion: The occurrence of incidentally found mandibular first premolar root variations should be an important component of dental CT reports.

Publication types

  • Comparative Study

MeSH terms

  • Bicuspid / diagnostic imaging*
  • Dental Pulp Cavity / diagnostic imaging*
  • Humans
  • Mandible
  • Radiography, Panoramic
  • Tomography, X-Ray Computed
  • Tooth Root / diagnostic imaging*