Imaging Sci Dent.  2019 Jun;49(2):103-113. 10.5624/isd.2019.49.2.103.

Correlations between anatomical variations of the nasal cavity and ethmoidal sinuses on cone-beam computed tomography scans

Affiliations
  • 1Dental Implant Research Center, Department of Oral and Maxillofacial Radiology, Dental School, Hamadan University of Medical Science, Hamadan, Iran.
  • 2Department of Biostatistics and Epidemiology, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran.
  • 3Department of Oral and Maxillofacial Radiology, Dental School, Zanjan University of Medical Science, Zanjan, Iran. Bahar_Hekmat70@yahoo.com

Abstract

PURPOSE
Anatomical variations of the external nasal wall are highly important, since they play a role in obstruction or drainage of the ostiomeatal complex and ventilation and can consequently elevate the risk of pathological sinus conditions. This study aimed to assess anatomical variations of the nasal cavity and ethmoidal sinuses and their correlations on cone-beam computed tomography (CBCT) scans.
MATERIALS AND METHODS
This cross-sectional study evaluated CBCT scans of 250 patients, including 107 males and 143 females, to determine the prevalence of anatomical variations of the nasal cavity and ethmoidal sinuses. All images were taken using a New Tom 3G scanner. Data were analyzed using the chi-square test, Kruskal-Wallis test, and the Mann-Whitney test.
RESULTS
The most common anatomical variations were found to be nasal septal deviation (90.4%), agger nasi air cell (53.6%), superior orbital cell (47.6%), pneumatized nasal septum (40%), and Onodi air cell (37.2%). Correlations were found between nasal septal deviation and the presence of a pneumatized nasal septum, nasal spur, and Haller cell. No significant associations were noted between the age or sex of patients and the presence of anatomical variations (P>0.05).
CONCLUSION
Radiologists and surgeons must pay close attention to the anatomical variations of the sinonasal region in the preoperative assessment to prevent perioperative complications.

Keyword

Ethmoid Sinus; Cone-Beam Computed Tomography; Anatomical Variation

MeSH Terms

Cone-Beam Computed Tomography*
Cross-Sectional Studies
Drainage
Ethmoid Sinus
Female
Humans
Male
Nasal Cavity*
Nasal Septum
Orbit
Prevalence
Surgeons
Ventilation
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