1-4. Oral Disease, Health History, Pano

Question 1

Define voxel

Answer 1

A volume element (pixel with third size)

Question 2

Explain partial volume averaging

Answer 2

If a pixel is only partially full, it may not be fully shaded. As a result, more zoomed in images may appear choppier or not smooth

Question 3

When should providers prescribe CBCT’s?

Answer 3

When they expect diagnostic yield will benefit patient care, enhance patient safety, and significantly improve clinical outcomes?

Question 4

Three methods to staff radiation protection

Answer 4

1. Position
2. Distance
3. Shielding

Question 5

X-ray Radiation sources in an office?

Answer 5

1. Primary Beam
2. Scatter radiation
3. Background radiation

Question 6

Distance and position rules

Answer 6

6 feet away from source and between 90 degrees and 135 from source

Question 7

Difference between deterministic and stochastic

Answer 7

Deterministic - Threshold amounts and below that threshold amount no clinically significant events occur (Cataracts or hair loss)
Stochastic - All or nothing effect (all exposure matters) - Cancer

Question 8

Some examples of multilocular lesions

Answer 8

1. KOT
2. Ameloblastoma
3. Central giant cell lesion

Question 9

How to describe radiographic lesions?

Answer 9

Shape
Edge
Number
Site
Effects

Question 10

Disease with cotton wool appearance

Answer 10

Paget’s

Question 11

Disease with step ladder apparance

Answer 11

Sickle cell disease

Question 12

Disease with ground glass disease

Answer 12

Fibrous dysplasia

Question 13

Disease with sunburst pattern (3)

Answer 13

Chrondrossarcoma
Osteosarcoma
Ewing’s sarcoma

Question 14

The closer structures are to the focal trough, are they more or less defined?

Answer 14

More defined

Question 15

“Lesion” that presents in the depression of the submandibular gland

Answer 15

Stafne’s defect

Question 16

Symmetric widened PDL space

Answer 16

Scleroderma (progressive systemic sclerosis)

Question 17

What is the panoramic innominate line?

Answer 17

Superimposition of posterior surface of zygomatic of maxilla and frontal process of zygoma

Question 18

Disease - Radiolucent with scalloped borders

Answer 18

Traumatic bone cyst

Question 19

Dentigerous cyst and differentials?

Answer 19

Pericoronal radiolucency attached to CEJ of unerrupted tooth

differential is similar to ameloblastoma, residual cyst, keratocyst, myxoma

Question 20

Periapical Cemento Osseous Dysplasia

Answer 20

Multiple periapical lucency’s which mature over time and become opaque

• Middle aged black women, vital anterior teeth, no pain or expansion

Question 21

Florid Cemento Osseous dysplasia

Answer 21

Multi-quadrant intrabony lesion - no tx necessary

Question 22

Most common primary malignancy of bone in individuals less than 25 yo?

Answer 22

Osteosarcoma - swift onset of pain and swelling, widened PDL, early lucency then opacity

Question 23

Odontogenic myxoma

Answer 23

Multilocular lucency with soap bubble pattern