Anatomy based corridors to the infratemporal fossa: Implications for endoscopic approaches.

摘要: Background The infratemporal fossa (ITF) represents an area densely packed with neurovascular structures within irregular boundaries. goal of this study was to classify the ITF into zones corresponding its anatomical spaces and order in which they are encountered during endonasal approach (anteroposterior axis). Methods Six cadaveric specimens (12 sides) injected colored latex were dissected. Following endoscopic medial maxillectomy Denker's approach, a progressive exploration masticator space upper parapharyngeal completed. A classification based on well-defined ascertained. Results divided five zones: Zone 1 (retromaxillary space)-space lying between posterolateral wall maxillary sinus temporalis pterygoid muscles. 2 (superior interpterygoid space)-area including superior head lateral muscle, V3 , foramen ovale. 3 (inferior space)-includes inferior pterygoid, muscles, enclosed by these 4 (temporo-masseteric muscle (comprising fat mostly). 5 (tubopharyngeal Eustachian tube, tensor, levator veli palatini space. Conclusion can be visualized as muscles structures. This novel system is useful guide approaches ITF, while decreasing potential for injury