Anterior cranial fossa
➢ Mental foramen is inferior to 2nd premolar tooth.
Fractures of the Maxillae and Associated Bones
Lateral Aspect of Skull
• Zygomatic arch • temporal & infratemporal regions • Temporal fossa • Mastoid process & styloid process
Inferior Aspect of Skull
Bowl-shaped floor of cranial cavity has 3 cranial fossae. Anterior cranial fossa is at the highest level, & posterior cranial fossa is at the lowest level.
skull
Cranium skeleton: unpaired: frontal, occipital, ethmoid & sphenoid bones paired: parietal, temporal bones
Facial skeleton: • maxilla, mandible,
zygomatic, nasal, lacrimal, vomer, palatine bones & inferior nasal concha甲, (hyoid bones).
Internal Aspect of Base of Skull
is formed by frontal bone anteriorly, ethmoid bone in middle, body & lesser wings of sphenoid posteriorly. Its greater part is formed by ridged orbital plates of frontal bone, which support frontal lobes of brain and form roofs of orbits.