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

Ribeiro, T M C; Freire, A R; Daruge Junior, E; Botacin, P R; Prado, F B; Rossi, A C

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

Afiliación

Ribeiro TMC; Department of Biosciences, Anatomy Division, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
Freire AR; Department of Biosciences, Anatomy Division, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
Daruge Junior E; Department of Social Dentistry, Forensic Dentistry Division, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
Botacin PR; Basic Sciences Department, Araçatuba Dental School, Paulista State University - UNESP, Araçatuba, São Paulo, Brazil.
Prado FB; Department of Biosciences, Anatomy Division, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil.
Rossi AC; Department of Biosciences, Anatomy Division, Piracicaba Dental School, University of Campinas, Piracicaba, São Paulo, Brazil. rossianac01@gmail.com.

Folia Morphol (Warsz) ; 81(4): 1042-1046, 2022.

Article en En | MEDLINE | ID: mdl-34545563

RESUMEN

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 1st and the 5th 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 characterise the foramen tympanicum in computed tomography (CT) scans of the population from southeastern part of Brazil. MATERIALS AND METHODS: A total of 78 CT scans of dry human skulls (20 female and 58 male) were used, which were selected randomly regarding the ages, ranged from 15 to 100 years. 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 χ2 test 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 extremely valuable for an accurate diagnosis, treatment plan and prognosis and a thorough preoperative assessment.

Asunto(s)

Conducto Auditivo Externo; Tomografía Computarizada por Rayos X; Adolescente; Adulto; Anciano; Anciano de 80 o más Años; Femenino; Humanos; Masculino; Persona de Mediana Edad; Adulto Joven; Prevalencia; Cráneo; Articulación Temporomandibular

Palabras clave

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

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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tomografía Computarizada por Rayos X / Conducto Auditivo Externo Tipo de estudio: Prevalence_studies / Risk_factors_studies Límite: Adolescent / Adult / Aged / Aged80 / Female / Humans / Male / Middle aged País/Región como asunto: America do sul / Brasil Idioma: En Revista: Folia Morphol (Warsz) Año: 2022 Tipo del documento: Article País de afiliación: Brasil Pais de publicación: Polonia

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