Name the bones of the skull.
Frontal Parietal Occipital Temporal Zygomatic Mandible Sphenoid Maxilla Ethmoid Nasal
Name the bones of the orbit.
Roof: frontal B. and lesser wing of the sphenoid B.
Floor: perpendicular plate of the palatine B, orbital surface of the maxilla B., and the zygomatic B.
Medial Wall: frontal process of the maxilla B., lateral mass of the ethmoid B., and the lacrimal B.
Lateral Wall: zygomatic process of the frontal B., greater wing of the sphenoid B., and the orbital surface of the zygomatic B.
What are the four fontanelles of the fetal skull?
Anterior, Sphenoid, Mastoid, and Posterior fontanelles
What bones are involved in the anterior fontanelle?
both frontal bones and both parietal bones
What bones are involved in the sphenoid fontanelle?
frontal bones, parietal bone, sphenoid bone and temporal bone
What bones are involved in the mastoid fontanelle?
parietal bone, occipital bone and temporal bone
What bones are involved in the posterior fontanelle?
2 parietal bones and the occipital bone
Blue Box: What is a Le Fort I Fx?
- horizontal Fx of the maxilla
- passes superior to the maxillary alveolar process
- crosses the bony nasal septum
- possibly involves the pterygoid plates of the sphenoid
Blue Box: What is a Le Fort II Fx?
- passes from the posterolateral part of maxillary sinus
- superomedially through the infraorbital foramen
- goes to bridge of nose
- entire cental part of face separated from cranium
Blue Box: What is a Le Fort III Fx?
- horizontal fx passes through the superior orbital fissure
- passes through ethmoid and nasal bones
- extends laterally through greater wings of sphenoid
- extends through frontozygomatic sutures
-fx of zygomatic arches causes maxillae and zygomatic bones to separate from cranium
Blue Box: Surgical Access to Cranial Vault and Bone Flaps
- the periosteum has poor osteogenic properties
- bone is wired/plated while healing
- heals best when flap incorporates overlying tissue
