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Morphological and Morphometric Study of Infraorbital Foramen in South Indian Population

Haobam Rajajee Singh, Suganthy Rabi .

Abstract


Background: The knowledge about the infraorbital foramen (IOF) is important to avoid iatrogenic injury to the infraorbital nerve during maxillofacial surgeries. This study aims to observe the shape, position and size of IOF and to measure its distance from surgically important bony landmarks.

Materials and Methods: A total of 50 dry skulls were studied for the shape, position and size of the IOF. Its distance from infraorbital margin, lateral margin of the piriform aperture and alveolar border was measured.

Results: The IOF was oval in 76%, circular in 26%, triangular in 12% and D-shaped in 2% of the skulls studied. Accessory IOF were present in 10%. Bony projection close to the upper margin of the IOF was seen in 40%. IOF was seen in line with the 2nd premolar on the right side in 82% and in line with the 1st molar on the left side in 72%. The mean distance of the IOF from infraorbital margin was 6.27± 1.60 mm on the right and 5.96 ± 1.60 mm on the left; from the alveolar border 25.23 ± 3.78 mm on the right and 23.99 ± 3.84mm on the left and from the lateral margin of piriform aperture was 13.81± 1.95 mm on the right and 11.55 ± 1.61mm on the left side. The mean transverse diameter of the IOF on the right was 2.76 ± 0.9 mm and 3.03 ± 0.65 mm on the left and the vertical diameter was significantly higher on the right (3.09 ± 0.61mm) when compared to the left (2.82 ± 0.68 mm).

Conclusion: The data provided in this study would help the anaesthetist to do successful regional nerve block during midfacial surgeries in South Indian population.

 


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References


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