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01-06-2018 | Original Article

Radiographic study of mandibular third molars: evaluation of the position and root anatomy in Brazilian population

Authors: Marcelo Bonifácio da Silva Sampieri, Francisca Lívia Parente Viana, Camila Lopes Cardoso, Márcia Ferreira Vasconcelos, Maria Helena Ferreira Vasconcelos, Eduardo Sanches Gonçales

Published in: Oral and Maxillofacial Surgery | Issue 2/2018

Abstract

Objectives

The root anatomy and position of mandibular third molars are important factors in assessing the level of difficulty of surgical removal procedures. In this light, this study aims to identify the most frequent position and the root anatomy of mandibular third molars.

Methods

The study sample comprised 1205 mandibular third molars from 710 panoramic radiographs evaluated. Regarding the position, all of them were based on Pell and Gregory’s and Winter’s classifications. The root anatomy was classified according to the type and number of roots, as well as the presence of laceration, fusion, or divergence. Gender and the quadrant were also considered. Following an interexaminer analysis, a statistical analysis was performed using the Kappa test.

Results

The results showed that the IA (40.3%) and mesioangular (53.8%) position was predominant in mandibular third molars. Regarding the anatomy, the most common were two roots (98.3%), of the conical simple type (88.9%), with absence of laceration (89.2%), divergence (84%), and fusion (80%).

Conclusion

The present study showed that the most prevalent mandibular third molar type in Brazilian patients was the IA and mesioangular position, with simple root anatomy. The result of this study can assist oral surgeons to better plan and assess the level of difficulty of surgical removal procedures.

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Title: Radiographic study of mandibular third molars: evaluation of the position and root anatomy in Brazilian population
Authors: Marcelo Bonifácio da Silva Sampieri
Francisca Lívia Parente Viana
Camila Lopes Cardoso
Márcia Ferreira Vasconcelos
Maria Helena Ferreira Vasconcelos
Eduardo Sanches Gonçales
Publication date: 01-06-2018
Publisher: Springer Berlin Heidelberg
Published in: Oral and Maxillofacial Surgery / Issue 2/2018
Print ISSN: 1865-1550
Electronic ISSN: 1865-1569
DOI: https://doi.org/10.1007/s10006-018-0685-y

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Springer Medicine

Radiographic study of mandibular third molars: evaluation of the position and root anatomy in Brazilian population

Abstract

Objectives

Methods

Results

Conclusion

Keynote webinar | Spotlight on sleep in brain health

Springer Medicine

Abstract

Objectives

Methods

Results

Conclusion

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