In this study, we aimed to analyze the variability in the size and localization of infraorbital foramen (IOF) with respect to the surrounding anatomical bony landmarks using the three-dimensional computed tomography (3D-CT) with the volume rendering and evaluate these morphometric parameters in relation to the gender and side. The cranial CT scans of 60 living adult subjects, without any trauma or malformation of facial bones were included in the study. Data of the subjects were collected in the Center of Radiology, Clinical Center Nis, Serbia. Measurements included the transverse and vertical diameter of the IOF foramen, the distance from IOF to facial midline, the distance to lateral margin of the piriform aperture, the distance to infraorbital margin and the distance to maxillary alveolar border. All measurements were done bilaterally and performed with a digital coordinate caliper. Obtained results were statistically analyzed. Observation of 120 hemi-skulls revealed that the IOF was present in all of them. The mean transverse diameter of the IOF was 2.81 ± 0.69 mm and the mean vertical diameter was 3.41 ± 0.88 mm. The IOF was located at an mean distance 26.17 ± 1.69 mm from facial midline, 14.99 ± 1.30 mm from the lateral margin of the piriform aperture, 9.06 ± 1.01 mm below the IOM and 28.22 ± 2.78 mm above the maxillary alveolar border. Statistically significant difference was found between males and females for the distance from IOF to PA (p < 0.05). These morphometric characteristics may have important implications for the surgical and local anesthetic planning.

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