SKULL THE BONY ORAL CAVITY INFRATEMPORAL AND PTERYGOPALATINE FOSSAE Dr. Andrea D. Székely Associate Professor Semmelweis University Department of Anatomy, Histology and Embryology Budapest OBJECTIVES • Learn the divisions of the skull (viscerocranium + neurocranium) • Learn the bony components of viscerocranium one by one, memorizing the surfaces, parts, grooves and foramina • Compose the boundaries of the viscerocranial cavities/spaces by using the previously acquired knowledge • Learn the mandible and maxilla together with their connections – they form the osseous boundary, together with the palatine bones, of the oral cavity • Find the interface (i.e. bones) shared between viscerocranium and neurocranium with respect to the spaces (infratemporal and pterygopalatine fossae) enclosed between them • LEARN ALL THE CONNECTIONS (http://semmelweis.hu/anatomia/files/2014/04/Connections-of-the-Skull.pdf) TOPOGRAPHICAL RELATIONS - VISCEROCRANIUM The facial skeleton (=viscerocranium) comprises the facial bones BOUNDARIES OF THE OSSEOUS ORAL CAVITY ANTERI ANTERIOR OR ANTERIOR OR Alveolar process + teeth Hard palate BOUNDERIES OF THE OSSEOUS ORAL CAVITY HARD PALATE MAXILLA, PALATINE BONES MANDIBLE MAJOR COMPONENTS Ramus Angle Body Serves for - muscle attachments - conduit for neurovascular bundles - holds the teeth THE SIZE OF THE ORAL CAVITY CHANGES DURING THE ENTIRE LIFE POSITION OF THE INFRATEMPORAL FOSSA INFERIOR VIEW OF THE INFRATEMPORAL FOSSA BOUNDERIES OF THE INFRATEMPORAL FOSSA MANDIBLE AND ZYGOMATIC ARCH ARE MISSING FROM THE IMAGE BOUNDERIES OF THE INFRATEMPORAL FOSSA ANTERIOR maxillary tuberosity inferior orbital fissure POSTERIOR temporomandibular joint SUPERIOR infratemporal surface (greater wing) squamous part of temporal EXTERNAL ramus of mandible coronoid process INTERNAL lateral plate of pterygoid pterygomaxillary fissure (and… the carotid vagina, tensor veli palatini, levator veli palatini, pharyngeal muscles) CONNECTIONS OF THE INFRATEMPORAL FOSSA Infratemporal fossa WHERE (TO/FROM) Pterygomaxillary fissure pterygopalatine fossa Inferior orbital fissure orbit (anterolateral part) Foramen ovale middle cranial fossa Foramen spinosum middle cranial fossa Petrotympanic (Glaserian) fissure tympanic cavity Alveolar foramina upper posterior teeth POSITION OF THE INFRATEMPORAL AND PTERYGOPALATINE FOSSAE BOUNDARIES OF THE PTERYGOPALATINE FOSSA CONNECTIONS OF THE PTERYGOPALATINE FOSSA Pterygomaxillary fissure Anterior Posterior Inferior orbital fissure Sphenopalatine foramen Greater and lesser palatine foramina Pterygoid canal Foramen rotundum (Posterior superior alveolar foramina Palatovaginal canal ) CONNECTIONS OF THE PTERYGOPALATINE FOSSA Pterygopalatine fossa WHERE (TO/FROM) Pterygoid (Vidian) canal external skull base Greater and lesser palatine canals (greater and lesser palatine foramina) oral cavity Inferior orbital fissure orbit (posteromedial part) Pterygomaxillary fissure infratemporal fossa Foramen rotundum middle cranial fossa Sphenopalatine foramen common nasal meatus PTERYGOPALATINE FOSSA 1. X RAY (CT) IMAGES HORIZONTAL SECTION FRONTAL SECTION PTERYGOPALATINE FOSSA 2. X RAY (CT) IMAGES PTERYGOPALATINE FOSSA 3. X RAY (CT) IMAGES PTERYGOPALATINE FOSSA 4. X RAY (CT) IMAGES Thank you very much for your attention!.