The Skull---Facial Bones

True or False. The maxillary bones articulate with ALL other facial bones.

False. The maxillary bones articulate with ALL other facial bones EXCEPT the mandible.

Which 7 bones form parts of the orbit walls?

Formed from: 1. Frontal (roof) 2. sphenoid (roof, lateral wall) 3. zygomatic (lateral wall) 4. maxillary (floor, medial wall) 5. palatine (floor) 6. lacrimal (medial wall) 7. ethmoid (medial wall) recall these bones going in clockwise direction of orbit.

The sphenoid bone is to the cranium as the maxillary bone is to the face. Hint: one word

KEYSTONE. The maxillary bones are "keystone" bones of the face.

Name 6 structures that the maxillary bone either contains or forms. It contains 4 structures and forms part of 2 different structures. Be sure to indicate which structures it forms and which ones it contains.

Maxillary bones contain: 1. maxillary sinuses 2. alveolar margin 3. inferiomedial surface of orbit 4. infraorbital foramen Maxillary bones form: 5. part of inferior orbital fissure 6. part of hard plate

The structure of an orbit wall has what 4 things?

Orbit walls have: 1. roof 2. lateral wall 3. medial wall 4. floor

True or false? Even though the ethmoid bone articulates with the maxillary bone to form part of the medial wall of the orbit, the ethmoid bone IS NOT a facial bone. It is a cranial bone.

True. ETHMOID BONE is one of eight CRANIAL BONES, not the facial bone!

Classify each of the following facial bones as paired or unpaired bones: palatine vomer maxilla mandible zygomatic nasal lacrimal inferior nasal conchae

Unpaired bones (2): -vomer and mandible Paired bones (6): -palatine -maxillae -zygomatic -nasal -lacrimal -inferior nasal conchae

ethmoid bone articulates with the ____________ bone to form medial surface of orbit.

ethmoid bone (in orange) is articulated with maxillary bone (in purple) to form medial surface of orbit.

Relative to the sizes of other paranasal sinuses, maxillary sinuses are the _____________. What is maxillary sinusitis?

largest. swelling below orbit of maxillary sinus.

Paranasal sinuses are lined with _________________ and are ________- filled sinuses.

mucous membrane, air filled sinuses

inferiomedial surface of orbit is formed by the ___________ bone of the face.

note: in diagram, arrow is pointing to inferior orbital fissure, but the structure we are identifying is the purple bone. purple bone inside circle is part of maxillary bone that forms INFERIOMEDIAL SURFACE OF ORBIT.

Similar to a room that has a roof, walls, and floor, the ___________ wall also is composed of these things.

orbit wall

True or False. The mandible is the lower jawbone of the face. It is the largest and strongest facial bone.

true.

Which are the only 2 facial bones that are NOT paired?

vomer and mandible

Name the 4 Paranasal Sinuses and their location to one another. "para- adjacent to"

- all 4 of these sinuses are adjacent to one another 1. Frontal sinsuses 2. ethmoidal sinuses 3. sphenoid sinuses 4. maxillary sinuses Name of each sinus is embedded in type of sinus they are called.

the mandible is composed of what 2 main parts?

- lower jawbone of face -composed of 2 main parts: 1. horizontal body "body of mandible" 2. two upright rami

lacrimal bones are located ___________ of the orbit walls.

--is 1/6 paired facial bones -is located in the medial orbital walls

palatine bones

-complete posterior part of hard palate -is 1/6 paired facial bones -the maxilla bone (purple) forms other part of hard palate

nasal bones

-is 1/6 paired facial bones -form bridge of nose

zygomatic bone is a paired/unpaired facial bone? It contributes to which part of the orbit?

-is 1/6 paired facial bones -forms lateral wall of orbits.

relative to the later walls of the nasal cavity, the INFERIOR NASAL CONCHAE project ______________. This bone is considered as a paired or unpaired bone?

-is 1/6 paired facial bones -is thin, curved bones that project medially and form lateral walls of nasal cavity [note: red one above it is the middle nasal conchae, which is part of ethmoid bone]

coronoid process is part of the _________. It is "tucked underneath" the zygomatic bone.

-part of mandible

mandibular angle

-part of mandible

ramus of mandible

-part of mandible

body of mandible

-part of mandible long part of jaw. from mandibular angle to chin.

Temporomandibular joint is site where the _________ fossa articulates with the _______________. Hint: these 2 bones are in the name of the joint.

-part of mandible - interface of mandibular condyle with mandibular fossa of temporal bone.

The ___________ is the "curvature" that goes from the mandibular condyle to the mandibular foramen.

-part of mandible -Mandibular notch

alveolar margin (of mandible)

-part of mandible -are superior to mental foramen of the mandible.

mental foramen is part of the largest and strongest facial bone. Relative to the alveolar margin, the MENTAL FORAMEN is _____________.

-part of mandible -inferiolateral

mandibular foramen

-part of mandible -nerves go through here

Mandibular condyle

-part of mandible, will articulate with the temporal bone to form temporomandibular joint (TMJ).

inferior orbital fissure

-part of maxillary bone

infraorbital foramen "infra- below"

-part of maxillary bone

alveolar margin

-part of maxillary bone (upper jaw) (but note: the mandible, lower jaw, also has this too).

Name and locate the 3 orbit wall openings.

-superior orbital fissure (line between lesser and greater wing of sphenoid bone) -inferior orbital fissure (bottom slit of side-ways L in the orbit) -optic canal (also part of sphenoid bone, which is superior and anterior to sella tursica).

hard palate is formed by which 2 facial bones?

-the more anterior part of hard plate (purple) is formed of maxillary bone

Vomer, along with the mandible, is a(n) ____________ facial bone. What facial structure does it form part of?

-unpaired facial bone -forms part of inferior nasal septume

compared to the mandible, which is the lower jaw of the face, the Maxillary Bones is the _________ of the face.

-upper jaw and encompasses most of face.

What are 5 functions of the facial bones? "F.C.O.T.A"

1. form FRAMEWORK of face 2. form CAVITIES for sensory organs 3. provide OPENINGS for passage of air & food 4. hold TEETH 5. ANCHOR face muscle

What 3 things is the nasal septum composed of? Name them and their relative position to one another. septum= partition separating the nostrils.

1. septal cartilage 2. perpendicular plate (of ethmoid bone)-superior to vomer 3. vomer- inferior to perpendicular plate

How many paired facial bones are there? What are they?

6 paired facial bones: -palatine -maxillae -zygomatic -nasal -lacrimal -inferior nasal conchae

What is unique about the articulation of maxillary bones to other bones? (think: how many facial bones does the maxillary bones articulate with?)

The maxillary bone articulates with ALL bones of the face EXCEPT the mandible!