Frequency of accessory mental foramen and anatomical variability of mental nerve anterior loop in a Peruvian population: A retrospective cone-beam computed tomography study.

  • José Heberth Tofiño-Medina Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú.
  • Luis Ernesto Arriola-Guillén Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú./Division of Orthodontics and Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú. 
  • Yalil Augusto Rodríguez-Cárdenas Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú.
  • Aron Aliaga-Del Castillo Department of Orthodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil.
  • Gustavo Armando Ruíz-Mora Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú./Division of Orthodontics, Faculty of Dentistry, Universidad Nacional de Colombia, Bogotá D.C, Colombia.
  • María Eugenia Guerrero Medico-Surgical Department, Faculty of Dentistry, Universidad Nacional Mayor de San Marcos, Lima, Perú./ Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú.

Abstract

Objective: To evaluate the frequency of accessory mental foramen (AMF) and anatomical variants of the mental nerve anterior loop using cone-beam computed tomography (CBCT) in a Peruvian population. Material and methods: This retrospective cross-sectional study evaluated 80 hemi-mandibles from 40 subjects using CBCT. The sample included 38 females and 42 males, with an average age of 25±4.45 years. A 3D multi-planar reconstruction was performed to identify the location and presence of accessory mental foramina, their morphological characteristics (oval or circular), their position with respect to the mental foramen (MF), anterior loop (AL) path and other anatomical landmarks including lengths and angles. Statistical analyses included chi square and t-tests. The significance level was p<0.05. Results: The frequency of AMF was 17% and the average distance AL-MF was 4.76±1.97mm. The measurements of the anterior border of AL and MF to the inferior mandibular border showed significant differences according to the sex (p<0.001 and p=0.009, respectively). Conclusion: The AMF prevalence was approximately 17%. There is no association between the AMF position and its morphology, sex or side evaluated. The distances from the anterior border of the AL and from the inferior border of the MF to the inferior mandibular border were greater in males. These findings should be considered when planning implant or mini-implant placement in this region.

Author Biography

Gustavo Armando Ruíz-Mora, Division of Oral and Maxillofacial Radiology, School of Dentistry, Universidad Científica del Sur, Lima, Perú./Division of Orthodontics, Faculty of Dentistry, Universidad Nacional de Colombia, Bogotá D.C, Colombia.

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Published
2020-09-15
How to Cite
TOFIÑO-MEDINA, José Heberth et al. Frequency of accessory mental foramen and anatomical variability of mental nerve anterior loop in a Peruvian population: A retrospective cone-beam computed tomography study.. Journal of Oral Research, [S.l.], v. 9, n. 3, p. 202-211, sep. 2020. ISSN 0719-2479. Available at: <http://www.joralres.com/index.php/JOR/article/view/joralres.2020.037>. Date accessed: 03 dec. 2020. doi: https://doi.org/10.17126/joralres.2020.037.
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Articles