Exam 1.12: Panographic Radiology Viewing and Evaluating Flashcards Preview

D2: 621 Radiology > Exam 1.12: Panographic Radiology Viewing and Evaluating > Flashcards

Flashcards in Exam 1.12: Panographic Radiology Viewing and Evaluating Deck (68)
Loading flashcards...
1

What should you do to create an environment suitable for reading a pan?

Viewbox with strong illumination and reduced ambient light

Hot spot, magnifying glass, and hood are helpful too

2

What order should you evaluate in?

Bone structures
Soft Tissue Shadows
Air spaces

Teeth are last

3

What is the first bony structure to evaluate

Right Coronoid Process

4

How might the coronoid process appear in relation to the zygomatic arch

Inferior, Superimposed, or slightly above

5

How do you know if the coronoid process is usually tall

If it is more than 1 cm above the midpoint of the superior border of the arch

6

What is the term for a tall coronoid arch?

Coronoid hyperplasia

7

What type of movement is hindered by coronoid hyperplasia?

Anteriomedial translatory.....patient has trouble fully opening mouth

8

What can be suspected if the coronoid hyperplasia is only on one side?

Osteochondroma

9

What patients will you see bilateral coronoid hyperplasia on?

Teen males thanks to excess growth hormone receptors on coronoid process

10

This appears as a semilunar rarefaction just below and medial to the sigmoid notch.

Medial sigmoid depression

11

What do you examine after the coronoid process?

The condylar head of the mandible

12

How might you determine if bone pathology is due to a break or inflammatory disease?

A break would include damage to the cancellous bone
Inflammatory disease would be limited to the cortical bone

13

If you see cortical rim degeneration and the patient's blood work has elevated RA factor, IgM, and erythrocyte sedimentation rate, what would you suggest is the problem?

Rheumatoid arthritis

14

What fibrous structure covers the articular surfaces of the joint in RA?

A pannus

15

What does the pannus have that physically destroys the joint surfaces and cartilage?

The pannus is filled with macrophages, proteases, and collagenases

16

If too much of the condylar head is resorbed, it leaves a sharp residual shape...what often occurs next

Perforation of the disk
Crepitus
Fibrous adhesions
Bony ankylosis
Open bite

17

What are two rare causes of the condylar degeneration in patient's without RA?

Regional spread of a parotid gland cancer
Primary osseous or cartilaginous neoplasm

18

If we are talking about osteoarthritis as opposed to RA, in what direction would we expect to see the remodeling progressing

Anteromedially

19

Once the condylar head has flattened enough, what anatomic feature will be visible?

Osteophyte, aka bone spur

20

How will subchondral cysts show up on the image

small ovoid RLs just beneath the cortical rim

21

Where might sclerosis be found in an osteoarthritic TMJ

On the condylar head and/or the temporal bone

22

What is it called when an osteophyte breaks loose

Loose bodies

23

How do you treat osteoarthritis patients with no pain?

You don't.

With pain you give them a condylar shave procedure

24

What is the condylar fovea

Large ovoid RL on the medial aspect of condyle
Not all patients have this
Just means that the bone is thinner here and attenuated less radiation

25

What direction is more common for bifid condyles

Mediolateral

26

What section of the mandible do we look at after the condylar head?

Cortical border starting by moving down the right ramus around the inferior border, and up to the left condyle looking for fractures

27

What is the first thing you need to determine if you see a jaw fracture?

Its age

28

For the first 4-6 weeks post-fractures what can you see

Only the RL fracture line

29

5-6 weeks post fracture what can you see

Fuzzy organic callus RP superimposed over the fracture line

30

How long does it takes for the callus to completely remodel and disappear from the radiograph

1 year