Chapter 11 - Sinuses/Mandible/TMJ Flashcards
Paranasal sinuses are lined with:
Mucous membrane
Paranasal sinuses are sometimes called the:
Accessory nasal sinuses
How many groups are there of paranasal sinuses
4
What are the 4 groups of paranasal sinuses
Maxillary
Frontal
Ethmoid
Sphenoid
Old term for maxillary sinuses
Antrum of Highmore
Maxillary sinuses are part of what structure
Facial bones
Where are maxillary sinuses located
Body of each maxillary bone
What sinuses are pyramid shaped
Maxillary
Maxillary sinuses have _____ _____ walls
Thin, bony
Conical projections from the __________ ___________ reach into the floor of the sinuses
Upper molars
Maxillay sinuses communicates with the ________ _______ and with each other
Nasal cavity
Nasal cavity is divided into 2 equal chambers called:
Fossae
Where is fluid or mucus in the maxillary sinuses
Nasal cavity/fossae
What sinuses are part of the cranium
Frontal sinuses
Sphenoid sinuses
Ethmoid
Where are frontal sinuses located
Posterior to the glabella
Frontal sinuses rarely become aerated before what age
6
Are frontal sinuses symmetrical
Rarely
What are the frontal sinuses separated by
Nasal septum
Do men or women have larger frontal sinuses
Men
Frontal sinuses may be singular, paired, or:
Totally absent
Where are ethmoid sinuses located
Within the lateral masses of the ethmoid bone
What are the collections in the ethmoid sinuses
Anterior
Middle
Posterior
From a lateral perspective, it looks like the _______ sinuses lie within the orbits, but are really helping to make up the ________ walls of each orbit
Anterior
Medial
Where are the sphenoid sinuses located
Sphenoid bone below the sella turcica
How are sphenoid sinuses shaped
Cube
Sphenoid sinuses are often separated by a _______
Septum
What does an air fluid level indicate in the sphenoid sinuses
Fracture
Blood or cerebral fluid in the sphenoid sinuses
Spenoid effusion
Pathways of communication which provide drainage
Osteomeatal Complex
Osteomeatal complex provides drainage for which sinuses
Frontal
Ethmoid
Maxillary
What causes sinusitis
Obstructed pathways
What are the two key passageways called of the ostemeatal complex
Infundibulum
Middle nasal meatus
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 āUā shaped notch
Ramus of the mandible
What is the notch of the ramus called
Mandibular notch
Each notch 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
How many maxillary sinuses are there
2
How many frontal sinuses are there
Usually 2
How many Ethmoid sinuses are there
Many
How many sphenoid sinuses are there
1 or 2
Purpose of paranasal sinuses
Assist in vocal resonance
Lighten the weight of skull
Produce mucus
What sinuses exhibit a definite cavity at birth
Maxillary
All paranasal sinuses communicate with each other and the:
Nasal cavity
Where is the middle nasal passageway located
Superior medial aspect of the sinus cavity
How does the large maxillary sinus drain?
Through the infundibulum passageway down through the middle nasal meatus into inferior nasal meatus
The uncinate process is part of what bone
Ethmoid bone
What does the uncinate process make up
Medial wall of the infundibulum passageway
Function of the ethmoid bulla
Received drainage from the frontal and ethmoid sinuses
How do the frontal and ethmoid sinuses drain
Into the ethmoid bulla, down through the middle nasal meatus into the inferior nasal meatus
