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 + ) • 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 and together with their connections – they form the osseous boundary, together with the palatine , 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 INFERIOR VIEW OF THE BOUNDERIES OF THE INFRATEMPORAL FOSSA

MANDIBLE AND ARE MISSING FROM THE IMAGE BOUNDERIES OF THE INFRATEMPORAL FOSSA ANTERIOR POSTERIOR temporomandibular joint SUPERIOR infratemporal surface (greater wing) squamous part of temporal EXTERNAL ramus of mandible coronoid process INTERNAL lateral plate of pterygoid (and… the carotid vagina, tensor veli palatini, levator veli palatini, pharyngeal muscles) CONNECTIONS OF THE INFRATEMPORAL FOSSA

Infratemporal fossa WHERE (TO/FROM)

Pterygomaxillary fissure

Inferior orbital fissure (anterolateral part)

Foramen ovale middle

Foramen spinosum

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 Greater and Pterygoid (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

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!