Topographic relationship of impacted third molars and mandibular canal: correlation of panoramic radiograph signs and CBCT images

Authors

  • Eduardo Luiz Delamare
  • Gabriela Salatino Liedke Federal University of Rio Grande do Sul
  • Mariana Boessio Vizzotto Federal University of Rio Grande do Sul
  • Heraldo Luis Dias da Silveira Federal University of Rio Grande do Sul
  • Tais Weber Furlanetto de Azambuja Federal University of Rio Grande do Sul
  • Heloisa Emilia Dias da Silveira Federal University of Rio Grande do Sul

DOI:

https://doi.org/10.20396/bjos.v11i3.8641395

Keywords:

Radiography, Tomography, Third molar

Abstract

Aim: This study evaluated the proximity and relation of impacted lower third molars and mandibular canal on panoramic radiography. Methods: Radiographic signals associated with proximity of structures and Pell & Gregory and Winter classifications of 78 impacted teeth were analyzed and compared with CBCT images (gold standard). The associations between the findings were tested with Pearson’s chi-square. Results: Direct contact between structures was observed in 85% of cases of radiolucent band over roots. Conclusions: Radiolucent band over roots is the image more associated with direct contact between structures and the one that indicates lingual positioning of the canal more consistently. Some categories of Pell & Gregory and Winter classifications suggested signs of the topographic location of the mandibular canal.

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Author Biographies

Eduardo Luiz Delamare

BDS, MSc; Private practice; Porto Alegre, RS.

Gabriela Salatino Liedke, Federal University of Rio Grande do Sul

BDS, MSc; PhD Student; Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS.

Mariana Boessio Vizzotto, Federal University of Rio Grande do Sul

BDS, MSc, PhD; Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS.

Heraldo Luis Dias da Silveira, Federal University of Rio Grande do Sul

BDS, MSc, PhD; Associate Professor; Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS.

Tais Weber Furlanetto de Azambuja, Federal University of Rio Grande do Sul

BDS, MSc, PhD; Associate Professor; Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS.

Heloisa Emilia Dias da Silveira, Federal University of Rio Grande do Sul

BDS, MSc, PhD; Professor and Department Head; Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul, Porto Alegre, RS.

Published

2015-10-27

How to Cite

1.
Delamare EL, Liedke GS, Vizzotto MB, Silveira HLD da, Azambuja TWF de, Silveira HED da. Topographic relationship of impacted third molars and mandibular canal: correlation of panoramic radiograph signs and CBCT images. Braz. J. Oral Sci. [Internet]. 2015 Oct. 27 [cited 2022 Dec. 4];11(3):411-5. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641395

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