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!