Akademik Veri Yönetim Sistemi
EANS 2025, Vienna, Avusturya, 5 - 09 Ekim 2025, ss.208, (Özet Bildiri)
This study aimed to anatomically define the endoscopic transorbital(ETO) transconjunctival approach to access the pterygopalatine fossa(PPF). Methods This study was conducted using 5 formalin-fixed,silicone-injected human cadaver heads at the Bahçes¸ehir University Faculty of Medicine Rhoton Anatomy Laboratory.A total of 10 PPFs on both orbits of these cadavers were examined using the ETO transconjunctival approach.Endoscopic dissections were performed using a 0-degree Olympus endoscope,recorded with a fiberoptic cable, light source,camera system,and a digital video recording system. Results The surgical technique consisted of three steps:1.Orbital Conjunctival Stage:An incision was made in the infraorbital region through a transconjunctival approach,followed by subperiosteal dissection extending posteriorly.2.Orbitomaxillary Stage:Osteotomy was performed with posterior compression on the infraorbital floor, revealing the orbitomaxillary segment of the infraorbital nerve(ION) and allowing entry into the maxillary sinus.3.Pterygopalatine Stage: The posterior maxillary wall was removed, exposing the PPF.The pterygopalatine segment of the ION was revealed,and other anatomical structures in the region were identified.The distance from the inferior orbital rim to the distal end of the infraorbital canal(surface to depth) was measured as an average of 21.8 ± 1.6mm.The course of the ION branch and CN V2 from the inferior orbital rim to the foramen rotundum(FR)was calculated as an average of 47.3 ± 4.4mm. The minimum amount of posterior maxillary wall that needed to be removed to access the ION transitioning to CN V2 within the PPF was recorded as 12.7 ± 3.5mm vertically and 11.9 ± 1.5mm horizontally(Table 1). Conclusions The ETO transconjunctival method has been shown to be an alternative approach to other techniques in selected cases for accessing the PPF.Its major advantages include a lower risk of complications and a more straightforward approach compared to other methods.Due to the limited number of anatomical and clinical studies in the literature on this topic,there is a particular need for new and extensive anatomical cadaver series.