TMJ/Mandible Test Flashcards
Which positioning line is perpendicular to the image receptor for a PA projection of the mandibular rami?
a.) GAL
b.) OML
c.) AML
d.) IOML
b.) OML
Which skull type is narroe from side to side?
a.) brachycephalic
b.) mesocephalic
c.) dolichocephalic
c.) dolichocephalic
Which bone of the orbit contains the tear ducts?
a.) lacrimal
b.) maxilla
c.) zygoma
d.) sphenoid
a.) lacrimal
The CR for the SMV method of the mandible enters:
a.) at the lips
b.) midway between the angle of the mandible
c.) at the acanthion
d.) 3 inches inferior to the symphisis
b.) midway between the angles of the mandible
In the axial AP (townes) mandible projection with the OML perpendicular to the IR, the central ray is:
a.) 25 to 30 degrees cephalic to the area of interest
b.) 30 degrees caudal, entering at the nasion
c.) 35 egrees caudal, entering 1 inch above the glabella
d.) perpendicular to the image receptor at the lips
c.) 35 degrees caudal, entering 1 inch above the glabella
Situation: A patient enters the ER with a possible fracture of the proximal ramus of the mandible. Which of the following routines would best diagnose this fracture?
a.) PA mandible projection, axiolateral oblique projection with a 45 degrees rotation towrads film, and submentovertex projection
b.) PA axial mandible projection, axiolateral oblique projection with no rotation and a 35 degrees AP axial projection
c.) parietoacanthial projection, axiolateral oblique projection with a 30 degree rotation toward film, and lateral facial bone projection
d.) PA mandible projection, axiolateral oblique projection with a 45 degree rotation, and 35 degree AP axial projection
b.) PA axial mandible projection, axiolateral oblique projection with no rotation, and a 35 degree AP axial projection
Why is the chin extended for an axiolateral oblique projection of the mandible?
a.) to open up the TMJ
b.) to prevent superimposition upon the cervical spine
c.) to profile the condylar process
d.) to better visualize the mentum
b.) to prevent superimposition upon the cervical spine
The ________ is located in the apex of the orbit.
a.) inion
b.) sella turcica
c.) superior orbital fissure
d.) optic nerve
d.) optic nerve
On the PA and PA axial projection for mandibular rami the patients head rests on:
a.) nose and chin
b.) nose, cheek and chin
c.) forehead, nose and cheek
d.) forehead and nose
d.) forehead and nose
The upper and lower teeth are embedded in the:
a.) symphisis menti
b.) palantine processes
c.) alveolar processes
d.) condyloid processes
c.) alveolar processes
A radiograph of a submentovertex projection reveals that the mandible is superimposed over the ethmoid and sphenoid sinsues. Which of the following modifications will eliminate this problem?
a.) perform the projection with the patient supine
b.) perform the axiolateral oblique instead of the submentovertex
c.) increase the extension of the head and neck
d.) increase the flexion of the head and neck
c.) increase the extension of the head and neck
The modified law method for TMJ requires a _________ degree rotation of the skull and a ____________ degree angle of the CR
a.) 5; 0
b.) 0; 25 to 30
c.) 10; 15
d.) 15; 15
d.) 15;15
How much skull rotation (from a lateral position) is required to place the ramus parallel to the image receptor for the axiolateral oblique projection of the mandible?
a.) 45 degrees
b.) 30 degrees
c.) none (keep the skull in lateral position)
d.) 53 degrees
c.) none (keep the skull in lateral position
The CR for PA axial projection of the mandible should be:
a.) perpendicular
b.) 35 degrees cephalic
c.) 15 degrees cephalic
d.) 20-25 degrees cephalic
d.) 20-25 degrees cephalic
Which line should be perpendicular to the IR for a modified waters positoin of the orbit?
a.) IPL
b.) LML
c.) MML
d.) OML
b.) LML
Which position will best demonstrate a fracture of the condyle of the ramus?
a.) open mouth
b.) closed mouth
b.) closed mouth
How many bones make up the calvaria and the floor of the skull?
a.) 24
b.) 8
c.) 14
d.) 22
b.) 8
In an axiolateral oblique (modified law) temporal bones position, the central ray should be at a :
a.) 15 degree caudal angle, entering approximately 1-1/2 inches superior to the uppermost EAM
b.) 30 degree caudal angle exiting through the EAM
c.) 20 degree cephalic angle, entering approximately 2 inches below the EAM
d.) 12 degree cephald angle, entering approximately 2 inches posterior to the uppermost EAM
a.) 15 degree caudal angle, entering approximately 1-1/2 inches superior to the uppermost EAM
Which of the following pertains to an AP axial (towne) cranial image obtained with the patients face rotated toward the right side?
a.) the atlas posterior arch is demonstrated within the foramen magnum
b.) the distance from the dorsum sellae to the lateral foramen magnum on the patients left side is narrower than on the right side
c.) the distance from the dorsum sellae to the lateral foramen magnum on the patients right side is narrower than on the left side
d.) the dorsum sellae is demonstrated superior to the foramen magnum
c.) the distance from the dorsum sellae to the lateral foramen magnum on the patients right side is narrower than on the left side
Ideally, the _________ should be perpendicular to the IR for an AP axial of the TMJ
a.) IOML
b.) IPL
c.) AML
d.) OML
d.) OML
A patient is unable to sufficiently hyperextend the neck for an SMV (shueller) cranial image. How should the positioning setup be adjusted for an optimal image to be obtained?
a.) align the central ray perpendicular to the IOML
b.) the iamge cannot be obtained
c.) align the central ray perpendicular to the OML
d.) extend the patients neck as far as possible, and use a perpendicluar central ray
a.) align the central ray perpendicular to the IOML
At what landmark should the CR be centered for a lateral projection of the orbit?
a.) outer canthus
b.) inferior to the outer canthus
c.) at the cheekbone
d.) midway between outer canthus and EAM
a.) outer canthus
If a patient is positioned correctly for an AP axial of the mandible, then which of the following evaluation criteria is true:
a.) there is no superimposition of rami
b.) the condyles are projected anterior to the petrous
c.) condyloid processes are seen with equal distances to the lateral borders of the cervical spine
d.) there is superimposition of rami
c.) condyloid processes are seen with equal distances to the lateral borders of the cervical spine
the gonion is: (choose all that apply)
a.) the angle of the mandible
b.) part of the temporomandibular fossa
c.) the junction of the body and the ramus
d.) also known as the mental protuberance
a.) the angle of the mandible
c.) the junction of the body and the ramus
What is the CR for the axiolateral (shueller) projection of the TMJs? (choose best 2)
1.) perpendicular
2.) 25-30 degrees caudal
3.) 25 degrees cephalad
4.) 1/2’’ anterior and 2’’ superior to upside EAM
5.) 1.5’’ superior to upside EAM
6.) 1/2’’ anterior and 1’’ superior to upside EAM
2 and 4
What is the maximum CR angulation used for the axiolateral oblique projection of the mandible?
a.) 45 degrees
b.) 25 degrees
c.) 10 to 15 degrees
d.) 30 degrees
b.) 25 degrees
The coronoid process articulates with:
a.) zygomatic bone
b.) nothing; it serves as a site for muscle attachment
c.) maxilla
d.) the temporal bone to make the TMJ
b.) nothing; it serves as a site for muscle attachment
Where does the CR exit for the PA axial projection of the mandible?
a.) nasion
b.) acanthion
c.) mentum
d.) junction of the lips
b.) acanthion
The pituitary gland (hypophysis cerebri) is associated with and protected by the _________ bone.
a.) sphenoid
b.) ethmoid
c.) temporal
d.) palantine
a.) sphenoid
The ________ portion forms the inferior and posterior part of the temporal bone walls.
a.) styloid
b.) petrous
c.) mastoid
d.) tympanic
c.) mastoid
The CR for an AP axial view of the TMJ should be centered:
a.) 3 inches above the nasion
b.) 1 inch superior to the EAM
c.) 1 inch posterior to the outer canthus
d.) at the glabella
a.) 3 inches above the nasion
The axiolateral oblique projection is used to demonstrate the mandible. How is the head positioned to demonstrate the symphisis of the mandible?
a.) true lateral
b.) 15 degrees toward the IR
c.) 45 degrees toward the IR
d.) 30 degrees toward the IR
c.) 45 degrees toward the IR
How many bones are contained in the skull?
22
Which projection best demonstrates the floor of the orbits?
a.) PA axial (caldwell) without modification
b.) parietoacathial (waters)
c.) lateral facial bones
d.) modified parietoacanthial (modified waters)
d.) modified parietoacanthial (modified waters)
Where does the CR exit for the PA projection of the mandible?
a.) junction of the lips
b.) mentum
c.) nasion
d.) acanthion
a.) junction of the lips
