Evaluation of morphological variations of petrotympanic fissure using computed tomography imaging of the temporal bone

Petrotympanic fissure (PF) is important for both dentists and otolaryngologists to know the temporal anatomy well especially for pre-surgical radiological evaluations. Computed tomography (CT) is indispensable method for temporal bone imaging. The purpose of this study was to evaluate PF morphology...

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Bibliographic Details
Published in:Journal of stomatology, oral and maxillofacial surgery oral and maxillofacial surgery, 2022-11, Vol.123 (6), p.e643-e649
Main Authors: Serindere, Mehmet, Serindere, Gozde, Gunduz, Kaan, Kopuz, Cem
Format: Article
Language:English
Subjects:
Anatomy
Computed tomography
Ear, Middle - anatomy & histology
Ear, Middle - diagnostic imaging
Female
Humans
Male
Petrotympanic fissure
Radiology
Retrospective Studies
Temporal Bone - diagnostic imaging
Tomography, X-Ray Computed
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Summary:Petrotympanic fissure (PF) is important for both dentists and otolaryngologists to know the temporal anatomy well especially for pre-surgical radiological evaluations. Computed tomography (CT) is indispensable method for temporal bone imaging. The purpose of this study was to evaluate PF morphology and position using CT. CT scans of 300 patients (600 PFs) were retrospectively evaluated. PF types were recorded by dividing into 3 groups (Type 1,2 and 3). Length of the mandibular fossa (MF) and PF, vertical diameter (VD) of the PF at the MF level, midpoint and tympanic cavity (TC) level were measured. PF position types were subdivided as low, midline and high. Type 1, 2 and 3 was found in 18.7%, 51.5% and 29.8% of the cases, respectively. The mean length of the MF and PF was 18.33 mm and 3.77 mm, respectively. The mean VD of the PF at the MF level, midpoint and TC level was 1.71, 0.98 and 0.97 mm, respectively. The low, midline and high position of PF was observed 14.5%, 54.3% and 31.2% of the cases, respectively. Length of the MF and PF in males was significantly higher than females. VD of the PF at the MF level in Type 1 and Type 3 was significantly higher than type 2. In type 1,VD of the PF at the midpoint was significantly higher than type 2 and type 3. VD of the PF at the TC level in Type 1 and Type 3 was significantly higher than type 2.
ISSN:2468-7855
2468-7855
DOI:10.1016/j.jormas.2022.06.014