Facial Bones Flashcards
Define the maxillary bones
Largest, immovable bone of the face
Both maxillary bones unite @midline and acanthion
What are the parts of the maxillary bones
Frontal process
Zygomatic process
Alveolar process
Palatine process
Infraorbital foramen
Define the frontal process
Extends upwards to attach to frontal bone
Define the zygomatic process
Where the maxillary attaches to the zygoma
Define the alveolar process
Houses the teeth
Define anterior nasal spine
Small pointed projection where the nose joins the acanthion
Define the infraorbital foramen
Inferior to infraorbital margin
Define the palatine process
Anterior 1/3 of the roof of the mouth
Aka hard palate
Define palatine bones
Horizontal portion forms the posterior 1/3 of roof of mouth
Vertical portion extends upward to the bony orbit
Against pterygoid projections
Define the zygoma
Cheek bones that attaches to the maxilla
What are the parts of the zygoma
The body ( in the center)
Frontal process makes lateral orbital margin
Zygomatic prominence
What makes the zygomatic arch
The zygoma and the zygomatic process of the temporal bone
Define nasal bones
Attaches to frontal bone and frontal process of maxillary bone
Define lacrimal bones
Part of the medial wall of the orbital cavity
Define the inferior nasal conchae
“Scroll” shaped bones that project medially from the lateral walls of the nasal cavity
Define the vomer
Inferior 1/2 of the bony nasal septum
Attaches to the perpendicular plate of ethmoid
Define the mandible
The mental “mouth” region
What are the 3 sections of the mandible
Mental region
Body
Ramus
What are the parts of the mental region
Mental protuberance
Mental point
Symphysis menti
Mental foramina
Alveolar process
What are the parts of the body
The gonion/angle
Alveolar process ( houses lower teeth)
What are the parts of the ramus
Gonion / angle
Condyle/ head
Neck
Mandibular notch
Coronoid process
What kind of joint is the TMJ (temporomandibular joint)
Hinge ( open and close mouth)
Gliding ( anterior movements)
Where is the Apex of the bony orbit located
Posterior end of the the orbit
Where is the base located on the bony orbit
The anterior end of the orbit ( orbital rim)
Where does the orbital apex lie
37 degrees towards the MSP
30 degrees superior
How many bone make up the bony orbit
7
What bones make up the outer orbit
Frontal bone ( Supra orbital margin)
Maxilla ( infraorbital margin)
Zygoma ( lateral orbital margin)
What bones make up the inner orbit
Lacrimal ( medial orbital wall posterior to frontal )
Ethmoid ( medial orbit wall posterior to lacrimal)
Sphenoid ( greater wing lateral wall posterior to zygoma & lesser wing just inferior to frontal creates optic foramen)
Palatine bone ( most posterior)
How many obit openings are there?
3
Describe the optic foramen
Round opening in the lesser wings of the sphenoid for optic nerve
Describe the superior orbital fissure
Slit like opening just inferior to optic foramen
Separates lesser and greater wings
Describe the inferior orbital fissure
Slit like opening anterior to superior orbital fissure
Between the greater wings of sphenoid and maxilla
What is a blowout fracture
Results from a direct blow to the eye
Maxillary sinus fills with fat and blood from the orbit
What is a tri-pod fracture
Results from direct impact to cheek
The zygoma separates from the frontal , temporal , and maxilla
What is a cleft palate
Incomplete union of the maxillary bone at the roof of the mouth
Results from failure of the upper lip to form
