open access

Ahead of Print
Original article
Submitted: 2021-05-11
Accepted: 2021-08-20
Published online: 2021-09-10
Get Citation

Foramen tympanicum prevalence in the population of southeastern of Brazil: a morphological study in computed tomography scans

T. M.C. Ribeiro1, A. R. Freire1, E. Daruge Júnior1, P. R. Botacin2, F. B. Prado1, A. C. Rossi1
DOI: 10.5603/FM.a2021.0086
·
Pubmed: 34545563
Affiliations
  1. Biosciences Department, Piracicaba Dental School, University of Campinas, 901 Limeira Avenue, 13414903 Piracicaba, Brazil
  2. Department of Basic Sciences, Araçatuba Dental School, Paulista State University, UNESP, Araçatuba, Brazil

open access

Ahead of Print
ORIGINAL ARTICLES
Submitted: 2021-05-11
Accepted: 2021-08-20
Published online: 2021-09-10

Abstract

Background: The foramen tympanicum is located on the anteroinferior region of the external acoustic meatus and posteromedial to the temporomandibular joint in children between the first and the fifth year of life. It is considered an anatomical variation when it persists in adults. The aim of this study was to verify the prevalence as well as to characterize the foramen tympanicum in CT scans of the population from southeastern Brazil.

Materials and methods: A total of 78 CT scans of dry human skulls were used, which were selected randomly regarding the ages, ranged from 15 to 100 years, and composed a total of 20 female and 58 males. The foramen tympanicum was identified in the images of the axial plane and confirmed in the images of the coronal and sagittal planes. The largest diameter (in mm) was obtained. The descriptive statistics (in %), Fisher's test and chi-square test (χ2) were performed to compare the prevalence of foramen tympanicum between sexes and sides. The probability value ≤ 0.05 was defined as a level of significance. Descriptive statistics were performed to verify the mean diameter of the foramen on the right and left sides of the skulls.

Results: The prevalence of foramen tympanicum was higher in females (P = 0.0070), bilaterally, as the absolute values of females were lower in relation to males. Fisher's exact test showed that the prevalence of foramen tympanicum was significantly higher in females (45%) than in males (15.52%). On the right side, the mean axial diameter was 2.23 mm (range 0.93–3.75 mm). On the left side, the mean axial diameter was 2.22 mm (range 0.9–3.61 mm).

Conclusions: The knowledge of anatomical variations is extremally valuable for an accurate diagnosis, treatment plan and prognosis and a thorough preoperative assessment.

Abstract

Background: The foramen tympanicum is located on the anteroinferior region of the external acoustic meatus and posteromedial to the temporomandibular joint in children between the first and the fifth year of life. It is considered an anatomical variation when it persists in adults. The aim of this study was to verify the prevalence as well as to characterize the foramen tympanicum in CT scans of the population from southeastern Brazil.

Materials and methods: A total of 78 CT scans of dry human skulls were used, which were selected randomly regarding the ages, ranged from 15 to 100 years, and composed a total of 20 female and 58 males. The foramen tympanicum was identified in the images of the axial plane and confirmed in the images of the coronal and sagittal planes. The largest diameter (in mm) was obtained. The descriptive statistics (in %), Fisher's test and chi-square test (χ2) were performed to compare the prevalence of foramen tympanicum between sexes and sides. The probability value ≤ 0.05 was defined as a level of significance. Descriptive statistics were performed to verify the mean diameter of the foramen on the right and left sides of the skulls.

Results: The prevalence of foramen tympanicum was higher in females (P = 0.0070), bilaterally, as the absolute values of females were lower in relation to males. Fisher's exact test showed that the prevalence of foramen tympanicum was significantly higher in females (45%) than in males (15.52%). On the right side, the mean axial diameter was 2.23 mm (range 0.93–3.75 mm). On the left side, the mean axial diameter was 2.22 mm (range 0.9–3.61 mm).

Conclusions: The knowledge of anatomical variations is extremally valuable for an accurate diagnosis, treatment plan and prognosis and a thorough preoperative assessment.

Get Citation

Keywords

temporomandibular joint, computed tomography, anatomy, foramen tympanicum, Huschke' s foramen, tridimensional morphometry

About this article
Title

Foramen tympanicum prevalence in the population of southeastern of Brazil: a morphological study in computed tomography scans

Journal

Folia Morphologica

Issue

Ahead of Print

Article type

Original article

Published online

2021-09-10

DOI

10.5603/FM.a2021.0086

Pubmed

34545563

Keywords

temporomandibular joint
computed tomography
anatomy
foramen tympanicum
Huschke's foramen
tridimensional morphometry

Authors

T. M.C. Ribeiro
A. R. Freire
E. Daruge Júnior
P. R. Botacin
F. B. Prado
A. C. Rossi

Regulations

Important: This website uses cookies. More >>

The cookies allow us to identify your computer and find out details about your last visit. They remembering whether you've visited the site before, so that you remain logged in - or to help us work out how many new website visitors we get each month. Most internet browsers accept cookies automatically, but you can change the settings of your browser to erase cookies or prevent automatic acceptance if you prefer.

By  "Via Medica sp. z o.o." sp.k., Świętokrzyska 73, 80–180 Gdańsk, Poland

tel.:+48 58 320 94 94, faks:+48 58 320 94 60, e-mail:  viamedica@viamedica.pl