open access

Vol 77, No 2 (2018)
ORIGINAL ARTICLES
Published online: 2017-08-30
Submitted: 2017-06-19
Accepted: 2017-07-24
Get Citation

Examination of foramen tympanicum: an anatomical study using cone-beam computed tomography

Y. Deniz, G. Geduk, A.Z. Zengin
DOI: 10.5603/FM.a2017.0078
·
Pubmed: 28868610
·
Folia Morphol 2018;77(2):335-339.

open access

Vol 77, No 2 (2018)
ORIGINAL ARTICLES
Published online: 2017-08-30
Submitted: 2017-06-19
Accepted: 2017-07-24

Abstract

Background: The foramen tympanicum (FT) is an osseous dehiscence of the temporal bone and usually closes by the age of 5 years. The foramen is located posteromedial to the temporomandibular joint and anteroinferior of the external auditory canal. The aim of this study is to define the prevalence, location and size of the foramen.

Materials and methods: We retrospectively examined 200 cone-beam computed tomography (CBCT) images (400 ears). We used a CBCT dental imaging system (GALILEOS, Sirona Dental Systems, Bensheim, Germany) working at 15–30 mA and 98 kV. We noted size and location (unilateral and bilateral) of the present FT.

Results: Foramen tympanicum was determined in 11.5% of 200 patients (they had FT at least on one side of the head). This was bilateral in 5 (2.5%) patients. Prevalence of the FT was significintly higher in females (8%) than in males (3.5%). FT was found more frequently on the left side (7.5%) than on the right side (4%). Mean axial diameter was 1.13 mm (range 0.23–4.43 mm), and mean sagittal diameter was 1.44 mm (range 0.22–3.99 mm).

Conclusions: Considering that FT was present in 11.75% of patients, radiologists and clinicians should be aware of the possible presence of this defect. It is known that this developmental dehiscence may cause herniation of temporomandibular joint, formation of salivary otorrhea, and spread of tumour or infection to the infratemporal fossa from external auditory canal. This study showed that CBCT may be preferred for imaging these conditions. (Folia Morphol 2018; 77, 2: 335–339)

Abstract

Background: The foramen tympanicum (FT) is an osseous dehiscence of the temporal bone and usually closes by the age of 5 years. The foramen is located posteromedial to the temporomandibular joint and anteroinferior of the external auditory canal. The aim of this study is to define the prevalence, location and size of the foramen.

Materials and methods: We retrospectively examined 200 cone-beam computed tomography (CBCT) images (400 ears). We used a CBCT dental imaging system (GALILEOS, Sirona Dental Systems, Bensheim, Germany) working at 15–30 mA and 98 kV. We noted size and location (unilateral and bilateral) of the present FT.

Results: Foramen tympanicum was determined in 11.5% of 200 patients (they had FT at least on one side of the head). This was bilateral in 5 (2.5%) patients. Prevalence of the FT was significintly higher in females (8%) than in males (3.5%). FT was found more frequently on the left side (7.5%) than on the right side (4%). Mean axial diameter was 1.13 mm (range 0.23–4.43 mm), and mean sagittal diameter was 1.44 mm (range 0.22–3.99 mm).

Conclusions: Considering that FT was present in 11.75% of patients, radiologists and clinicians should be aware of the possible presence of this defect. It is known that this developmental dehiscence may cause herniation of temporomandibular joint, formation of salivary otorrhea, and spread of tumour or infection to the infratemporal fossa from external auditory canal. This study showed that CBCT may be preferred for imaging these conditions. (Folia Morphol 2018; 77, 2: 335–339)

Get Citation

Keywords

foramen tympanicum, foramen of Huschke, cone-beam computed tomography (CBCT), dental volumetric tomography

About this article
Title

Examination of foramen tympanicum: an anatomical study using cone-beam computed tomography

Journal

Folia Morphologica

Issue

Vol 77, No 2 (2018)

Pages

335-339

Published online

2017-08-30

DOI

10.5603/FM.a2017.0078

Pubmed

28868610

Bibliographic record

Folia Morphol 2018;77(2):335-339.

Keywords

foramen tympanicum
foramen of Huschke
cone-beam computed tomography (CBCT)
dental volumetric tomography

Authors

Y. Deniz
G. Geduk
A.Z. Zengin

References (22)
  1. Afghari P, Ghaffari R, Sohilipour S. Anatomical assessment of foramen tympanicum using cone beam computed tomography images. Dental Hypotheses. 2016; 7(3): 107.
  2. Akbulut N, Kursun S, Aksoy S, et al. Evaluation of foramen tympanicum using cone-beam computed tomography in orthodontic malocclusions. J Craniofac Surg. 2014; 25(2): e105–e109.
  3. Akcam T, Hidir Y, Ilica AT, et al. Temporomandibular joint herniation into the external ear canal through foramen of Huschke. Auris Nasus Larynx. 2011; 38(5): 646–649.
  4. Anson J, Donaldson JA. Surgical anatomy of the temporal one. 3rd ed. W B Saunders. Philadelphia. 1981: 122–123.
  5. Applebaum EL, Berg LF, Kumar A, et al. Otologic complications following temporomandibular joint arthroscopy. Ann Otol Rhinol Laryngol. 1988; 97(6 Pt 1): 675–679.
  6. Cecire AA, Austin BW, Ng PK. Polyp of the external ear canal arising from the temporomandibular joint: a case report. J Otolaryngol. 1991; 20(3): 168–170.
  7. Chilla R. [Otosialorrhoea - a rare case of a spontaneous salivary fistula of the external auditory canal]. HNO. 2002; 50(10): 943–945.
  8. Dalchow CV, Weber AL, Bien S, et al. Value of digital volume tomography in patients with conductive hearing loss. Eur Arch Otorhinolaryngol. 2006; 263(2): 92–99.
  9. Dalchow CV, Weber AL, Yanagihara N, et al. Digital volume tomography: radiologic examinations of the temporal bone. Am J Roentgenol. 2006; 186(2): 416–423.
  10. Dingle AF. Fistula between the external auditory canal and the temporomandibular joint: a rare complication of otitis externa. J Laryngol Otol. 1992; 106(11): 994–995.
  11. Gonzalez PN, Bernal V, Perez SI. Analysis of sexual dimorphism of craniofacial traits using geometric morphometric techniques. Int J Osteoarchaeol. 2011; 21(1): 82–91.
  12. Hawke M, Kwok P, Mehta M, et al. Bilateral spontaneous temporomandibular joint herniation into the external auditory canal. J Otolaryngol. 1987; 16(6): 387–389.
  13. Hawke M, Kwok P, Shankar L, et al. Spontaneous temporomandibular joint fistula into the external auditory canal. J Otolaryngol. 1988; 17(1): 29–31.
  14. Heffez L, Anderson D, Mafee M. Developmental defects of the tympanic plate: case reports and review of the literature. J Oral Maxillofac Surg. 1989; 47(12): 1336–1340.
  15. Kozerska M, Skrzat J, Szczepanek A. Application of the temporal bone for sex determination from the skeletal remains. Folia Med Cracov. 2015; 55(2): 33–39.
  16. Lacout A, Marsot-Dupuch K, Smoker WRK, et al. Foramen tympanicum, or foramen of Huschke: pathologic cases and anatomic CT study. Am J Neuroradiol. 2005; 26(6): 1317–1323.
  17. Mao JJ, Nah HD. Growth and development: hereditary and mechanical modulations. Am J Orthod Dentofacial Orthop. 2004; 125(6): 676–689.
  18. Prowse SJ, Kelly G, Agada F. Temporomandibular joint herniation and the foramen of Huschke: an unusual external auditory canal mass. J Laryngol Otol. 2011; 125(12): 1279–1281.
  19. Sharma PD, Dawkins RS. Patent foramen of Huschke and spontaneous salivary fistula. J Laryngol Otol. 1984; 98(1): 83–85.
  20. Tozoglu U, Caglayan F, Harorli A. Foramen tympanicum or foramen of Huschke: anatomical cone beam CT study. Dentomaxillofac Radiol. 2012; 41(4): 294–297.
  21. Wang RG, Bingham B, Hawke M, et al. Persistence of the foramen of Huschke in the adult: an osteological study. J Otolaryngol. 1991; 20(4): 251–254.
  22. Weissman JL, Hirsch BE, Chan K, et al. Dehiscent temporomandibular joint. Radiology. 1991; 180(1): 211–213.

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