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. 2024 Jan 25;14(3):260.
doi: 10.3390/diagnostics14030260.

Spatial Position and Anatomical Characteristics Associated with Impacted Third Molars Using a Map-Reading Strategy on Cone-Beam Computed Tomography Scans: A Retrospective Analysis

Djalma Maciel de Lima  1 , Cyntia Rodrigues de Araújo Estrela  1 , Cristiane Martins Rodrigues Bernardes  1 , Lucas Rodrigues de Araújo Estrela  1 , Mike Reis Bueno  2 , Carlos Estrela  3
Affiliations

Spatial Position and Anatomical Characteristics Associated with Impacted Third Molars Using a Map-Reading Strategy on Cone-Beam Computed Tomography Scans: A Retrospective Analysis

Djalma Maciel de Lima et al. Diagnostics (Basel). .

Abstract

(1) Background: This study assessed the spatial position and anatomical features associated with impacted third molars through a map-reading strategy employing cone-beam computed tomography (CBCT). (2) Methods: The positioning of impacted third molars on CBCT was assessed using Winter's and Pell and Gregory's classifications. External root resorption in mandibular second molars was categorized according to Herman's classification. Additionally, the relationship between the mandibular third molar root apex and the mandibular canal was examined. Comparative statistical analysis was conducted using Fisher's exact test, with a significance level considered as 5%. (3) Results: The results indicated that, based on Winter's classification, 48.06 % of impacted teeth were positioned mesioangularly. Employing Pell and Gregory's classification, 43.22% of the impacted molars fell into positions B and C, with 54.2% classified as Class II. A notable 69.7% of teeth exhibited no contact between the root apex and the mandibular canal, and external root resorption in the distal aspect of the second molar was absent in 88.7% of cases. (4) Conclusions: Utilizing the map-reading strategy with CBCT scans to assess the anatomical positions and characteristics of impacted third molars enhances professional confidence and sets a standard for quality and safety in the surgical procedure for patients.

Keywords: anatomy; cone-beam computed tomography; impacted third molar; inferior third molar; mandibular canal; surgery.

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Conflict of interest statement

The authors declare no conflicts of interest. The study was developed from the retrospective analysis of a database from a private radiological clinic. The author (Mike Reis Bueno) is a radiologist and was one of the examiners of the images. We believe that the fact that the author works at the place where the information is collected does not constitute a conflict of interest.

Figures

Figure 1
Figure 1
CBCT scans showing an overview of the spatial position and anatomical characteristics related to impacted third molars (A–C).
Figure 2
Figure 2
CBCT scans showing the anatomical relationship between the root apex of the impacted third molar and the mandibular canal (A–C).
Figure 3
Figure 3
CBCT scans showing the distal side of the mandibular second molar and the possibility of root resorption associated with impacted third molar (A–D).
See this image and copyright information in PMC

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