Chapter 11 - Facial Bones/Orbits/Nasal Bones Flashcards
How many facial bones are there?
14
What are the 14 facial bones
2 maxillary
2 zygomatic
2 lacrimal
2 nasal
2 nasal conchae
2 palatine
1 vomer
1 mandible
What is the largest immovable bone of the face
Maxillary
Where are the maxillary bones anchored
Below the nasal septum
What are the 3 cavities that maxilla assists with
Mouth
Nasal cavity
One orbit
What are the 4 processes projecting from the body of maxilla
Frontal
Zygomatic
Alveolar
Palatine
What are embedded in cavities along the inferior margin of the alveolar process
Eight upper teeth
What do the palatine processes form
Roof of the mouth
Congenital defect where the palatine bones do not unite
Cleft palate
What forms the posterior part of the hard palate
Palatine bones
The zygomatic bones are located _______ to the zygomatic process
Lateral
The zymomatic bones form the prominent part of the __________ and make up the lower outer portion of each ________
Cheek
Orbit
What makes up the zygomatic arch
Zygomatic bone and zygomatic process of the temporal bone
Thinnest and most delicate bones of the body
Lacrimal and nasal bones
What does lacrimal mean
Tears
Lacrimal is the size and shape of a
Fingernail
Lacrimal is located _________ on the medial side of the orbit
Anteriorly
What forms the bridge of the nose
2 nasal bones
Where are the nasal bones in comparsion to the frontal process of the maxillae
Anterior and superior
Nasal conchae project from the ________ walls of the nasal cavities
Lateral
Superior and middle nasal conchae are formed from what bone
Ethmoid
Function of nasal conchae
Break the flow of air coming in through the nose
Cleans and warms the air as it comes in contact with the mucous membrane
Location of the vertical portion of the palatine bone
Between pterygoid plate of the sphenoid bone and maxilla
Horizontal portion of the palatine bone makes up
Posterior portion of the hard palate
What does vomer mean
Plowshare
What makes up the nasal septum
Vomer and perpendicular plate of the ethmoid bone
Anteriorly the bony nasal septum is cartilaginous and called the
Septal cartilage
Where does a deviated septum usually occur
Junction between the septal cartilage and the vomer
Surface of the vomer bone is marked by:
Small furrow-like depressions for blood vessels
Where is the source of the noseblood when these is trauma to the nose
Vomer
What is the thin/horse-shaped bone
Mandible
What is the largest facial bone
Mandible
What is the only moveable bone in the skull
Mandible
Mandible is 2 bones from birth until:
1 year
Angle of the mandible is also known as
Gonion
Superior to the gonion is the
Ramus
Both mandible bodies unite to form the
Symphysis Menti
Frontal veiw of the mandible shows the
Body
The depression below the symphysis menti is the
Mentum
The very center of the mentum is the
Mental point
What serves as a passage way for nerves and blood vessels located on each half of the mandible
Mental foramen
What terminates in a “U” shaped notch
Ramus of the mandible
What is the notch of the ramus called
Mandibular notch
Each notch on the ramus has two processes, the most anterior process is the ___________ and the most posterior process is the ______
Coronoid process
Condyloid
Where does the condyloid process fit into
TM fossa of the temporal bone
What is the only moveable joint in the skull
TMJ
What shape are the orbits
Cone
Orbits - rim of the bone is called the
Base
Orbits - the point of the cone whcih is most posterior is called the
Apex
The apex of the optic bone corresponds to the
Optic foramen
Due to the shape of the orbits, when the head is in a lateral position the OML is parallel to the floor and projects superiorly at a ______ angle and medial at a _________ angle
30 degree angle
37 degree angle
How many bones is the orbit composed of
7
What bones make up the circular base of the orbit
Maxilla
Frontal
Zygomas
What bones make up the inside of the cone of the orbit
Sphenoid
Ethmoid
Lacrimal
Palatine
What are the 3 holes in the orbit
Optic foramen
Superior orbital fissure
Inferior orbital fissure
What is the optic foramen
A hole in the sphenoid bone located at the very posterior of the cone
What is the superior orbital fissure
An opening between the greater and lesser wings of the sphenoid bone located lateral to the optic foramen
Where is the inferior orbtial fissure
Located between maxilla, zygomatic bone, and the greater wing of the sphenoid
What is the small piece of bone which is a portion of the lateral wall of the optic canal
Sphenoid strut
What facial bones are located internally and not visible from the exterior skeleton
Palatine bones
Vomer
What 2 facial bones are unpaired?
Mandible
Vomer
Where is the anterior nasal spine
Upper part where the maxillae are united
What is the superior aspect of the anterior nasal spine
Acanthion
What is the air-filled cavity in the body of the maxillary bone
Maxillary sinus
What type of joint is formed by the two palatine processes
Synarthrodial
What part of the sphenoid is shown on the inferior view of the palatine bones
Pterygoid hamuli
Zygomatic bones are also knwon as
Malar bones
Inferior nasal conchae are also refered to as
Turbinates
The vomer forms what portion of the nasal septum
Inferoposterior
Where is the body of the mandible
Left angle around to right angle
What is the ridge that extends along the superior portion of the body of the mandible
Alveolar process
Flat triangular area below the symphysis menti
Mental protuberance
What ramus process cannot be palpated and does not articulate with another bone
Coronoid process
What are the two parts of the condyloid proces
Condyle/head and neck
What part of the condyloid process fits in the TM fossa
Condyle
When the mouth opens, the _______ and the _________ move forward
Condyle and fibrocartilage
TMJ is a two-part synovial joint. What divides the upper and lower portions
Artciular fibrous disk
What are the movement types of TMJ
Bicondylar
Plane (gliding)
What type of joints are the teeth with the maxilla and mandible
Fibrous
Gomphosis
What projection is used for open and closed mouth TMJ
Axiolateral (Schuller method)
Where is TMJ compared to the EAM
Anterior and slightly superior
What forms the roof of the orbit
Orbital plate of the frontal bone
What forms the lateral walls of the orbit
Zygoma
What forms the floor of the orbit
Zygoma and maxilla
What cranial nerve is the optic nerve
CN II
What cranial nerves go through the superior orbital fissure
CN III to CN VI
What cranial nerve run through inferior orbital fissure
CN V