Imaging Sci Dent.
2021 Mar;51(1):17-25. 10.5624/isd.20200132.
Directions of mandibular canal displacement in ameloblastoma: A computed tomography mirrored-method analysis
- Evangelista K
1 - Cardoso L2
- Toledo 2
- Gasperini G2
- Valladares-Neto J2
- Soares Cevidanes LH3
- Oliveira Ruellas ACd3
- Garcia Silva MA4
- Affiliations
-
- 1Department of Orthodontics, School of Dentistry, Federal University of Goiás, Goiânia, Brazil
- 2University Clinical Hospital, Federal University of Goiás, Goiânia, Brazil
- 3Department of Orthodontics and Pediatric Dentistry, School of Dentistry, University of Michigan, Ann Arbor, MI, USA
- 4Department of Stomatological Sciences, School of Dentistry, Federal University of Goiás, Goiânia, Brazil
- KMID: 2527047
- DOI: http://doi.org/10.5624/isd.20200132
Abstract
- Purpose
This study was performed to investigate mandibular canal displacement in patients with ameloblastoma using a 3-dimensional mirrored-model analysis.
Materials and Methods
The sample consisted of computed tomographic scans of patients with ameloblastoma (n=10) and healthy controls (n=20). The amount of mandibular canal asymmetry was recorded as a continuous variable, while the buccolingual (yaw) and supero-inferior (pitch) directions of displacement were classified as categorical variables. The t-test for independent samples and the Fisher exact test were used to compare groups in terms of differences between sides and the presence of asymmetric inclinations, respectively (P<0.05).
Results
The length of the mandibular canal was similar on both sides in both groups. The ameloblastoma group presented more lateral (2.40±4.16 mm) and inferior (−1.97±1.92 mm) positions of the mental foramen, and a more buccal (1.09±2.75 mm) position of the middle canal point on the lesion side. Displacement of the mandibular canal tended to be found in the anterior region in patients with ameloblastoma, occurring toward the buccal and inferior directions in 60% and 70% of ameloblastoma patients, respectively.
Conclusion
Mandibular canal displacement due to ameloblastoma could be detected by this superimposed mirrored method, and displacement was more prevalent toward the inferior and buccal directions. This displacement affected the mental foramen position, but did not lead to a change in the length of the mandibular canal. The control group presented no mandibular canal displacement.
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