Morphometric evaluation of the depth of the forame/canal/groove infra orbitary (FIO/CIO/SIO)

Abstract

Introduction. The infra-orbital foramen (FIO)/infra-orbital canal (CIO)/infra-orbital groove (SIO) complex is an anatomical formation through which the infra-orbital nerve (NIO) travels, a structure that is considered important to approach orbital floor surgery in orbital “blow out” fractures. Objective. To investigate the morphometric differences and the prevalence of the depth of the CIO/SIO complex in dry skulls, and to point out the importance of these variations in the surgical practice of nerve and face injuries. Method. 15 adult skulls (30 sides) were used, from which depth measurements of the FIO/CIO/SIO complex were taken. The study was carried out at the Metropolitan University of Santos with the aid of a digital caliper. Results. Small variations were observed among depth measurements, with a minimum value of 17.13mm and a maximum value of 37.08mm. With the average of 27.243±4.729723mm. Conclusion. Accurate knowledge of the anatomy of the infraorbital region is essential for a safer and more effective surgery to correct fractures of the orbital floor, with a view to preserving vision and aesthetics. In this way, postoperative complications can be reduced, and the best result can be provided.