Prelab sauerland skull, superficial face, and scalp Flashcards
(33 cards)
What 2 parts can the skull be divided into?
the cranium and the skeleton of the face or facial bones
how many bones are part of the skeleton of the face or facial bones?
14 bones
How many bones are there in the cranium?
8 bones
What does the cranium do?
lodges and protects the brain
In (blank) fractures, bones of the cranium and bones of the face undergo traumatic separation.
Le Fort fractuers
What are 2 complex and unpaired bones of the neurocranium?
sphenoid and ethmoid
So what are the 8 bones of the neurocranium?
frontal, 2 parietal, occipital, 2 temporal, sphenoid, ethmoid
What does the sphenoid bone look like?
a butterfly
What are all the facial bones?
2 nasal bones 2 maxillary bones 2 palantine bones 2 inferior nasal concha vomer 2 lacrimal bone 2 zygomatic bone mandible = 14 bones
What are the total number of bones in the skull (excluding the auditory ossicles)?
22
The maxillary bone (maxilla), zygomatic bone (malar bone), frontal bone, sphenoid bone, ethmoid bone, lacrimal bone all make up what?
the bones of the orbit
What is a le fort I and II fracture?
partial fracture of normally fused bones of the skull
What is a le fort III fracture?
complete dysjunction of normally fused bones of the skull
What is this:
wide variety of horizontal fractures of the maxilla, passing superior to the maxillary alveolar process (i.e superior to the roots of the upper teeth) crossing the bony nasal septum sometimes the pterygoid plates of the sphenoid bone
Le Fort I fracture
What is this:
Passes from the posterolateral parts of the maxillary sinuses and then superomedially through infraorbital structures, the lacrimal bones, the ethmoid bone, and up to the bridge of the nose. As a result, the entire
pyramidal-shaped central part of the face, including the hard palate and the maxillary alveolar processes, is separated from the rest of the cranium.
Le Fort II fracture
What is this:
This is a severe horizontal fracture that passes through the superior parts of orbit and the ethmoid and nasal bones. It extends laterally through the greater wings of the sphenoid bone and the frontozygomatic sutures. Often, the zygomatic bones and the zygomatic arches are also fractured.
This is a complete cranio-facial
dysjunction.
Le Fort III fracture
craniogacial dysjunction in le fort III fracture distorts (blank)
facial symmetry
The skull of a newborn is extremely thin and (blank)
pliable
What are the three thin and pliable bones of the skull of the newborn?
frontal, parietal, occipital
What are the three sutures of the newborn skull?
sagittal, coronal, lambdoid
What are the 2 fontanels of the newborn skull?
anterior and posterior
How can a babies skull fit through the birth canal?
the head becomes cone shaped cuz the halves of the frontal become flat, the occipital bone is drawn out and one parietal bone slightly overrides the other
When does the baby’s calvaria (skull cap) return to normal?
a few days after birth
At birth, the bones of the calvaria are smooth and (Blank). No diploe (spongy bone) is present.
unilaminar
