DENT 1050 Chapter 22 Flashcards Preview

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Flashcards in DENT 1050 Chapter 22 Deck (28):
1

1. Which of the following describes a use of a panoramic image?
a. diagnosis of caries
b. evaluation of periodontal disease
c. evaluation of impacted molars
d. evaluation of periapical disease

c. evaluation of impacted molars

2

2. The zone in which structures are clearly demonstrated on a panoramic image is termed:
a. the focal trough
b. the rotation center
c. the ghost image
d. the midsagittal plane

a. the focal trough

3

3. Rare earth intensifying screens are recommended in panoramic imaging because:
a. rare earth screens emit a blue light
b. rare earth screens provide a more diagnostic image
c. rare earth screens require less x-ray exposure for the patient
d. the images convert faster in automatic processors

c. rare earth screens require less x-ray exposure for the patient

4

4. A thyroid collar is not recommended in panoramic imaging because:
a. it blocks the x-ray beam and obscures information
b. there is a relatively low dose of radiation the the thyroid gland in panoramic imaging
c. it is impossible to sterilize the thyroid collar
d. all of the above

a. it blocks the x-ray beam and obscures information

5

5. The imaginary line that passes from the bottom of the eye socket through the top of the ear canal is termed:
a. the midsagittal plane
b. the Frankfort plane
c. the vertebral plane
d. the orbital plane

b. the Frankfort plane

6

6. a. Panoramic b. Intraoral imaging c. both;
The receptor and the tubehead rotate around the patient.

a. Panoramic

7

7. a. Panoramic b. Intraoral imaging c. both;
This type of image is used to examine the extent of large lesions

a. Panoramic

8

8. a. Panoramic b. Intraoral imaging c. both;
The dental arches must be aligned to the focal trough

a. Panoramic

9

9. a. Panoramic b. Intraoral imaging c. both;
The tubehead contains a filament used to produce electrons and a target used to produce x-rays.

c. both

10

10. a. Panoramic b. Intraoral imaging c. both;
The collimator is a lead plate with an opening in the shape of a narrow vertical slit.

a. Panoramic

11

11. a. Panoramic b. Intraoral imaging c. both;
The collimator is a lead plate with a small, round or rectangular opening.

b. Intraoral imaging

12

12. a. Panoramic b. Intraoral imaging c. both;
The vertical angulation of the tubehead is variable.

c. both

13

13. a. Panoramic b. Intraoral imaging c. both;
A head positioner is used to position the patient's head.

a. Panoramic

14

14. a. Panoramic b. Intraoral imaging c. both;
A screen film is used.

a. Panoramic

15

15. a. Panoramic b. Intraoral imaging c. both;
A cassette holder with two intensifying screens is used.

a. Panoramic

16

16. a. Panoramic b. Intraoral imaging c. both;
The x-ray film must be loaded into a cassette in a darkroom under safelight conditions.

a. Panoramic

17

17. a. Panoramic b. Intraoral imaging c. both;
A lead apron with a thyroid collar must be placed on the patient.

b. Intraoral imaging

18

18. a. Panoramic b. Intraoral imaging c. both;
All jewelry (earrings and necklaces) must be removed before exposure.

c. both

19

19. a. Panoramic b. Intraoral imaging c. both;
The midsagittal plane must be positioned perpendicular to the floor.

c. both

20

20. a. Panoramic b. Intraoral imaging c. both;
The vertebral column must be perfectly straight.

a. Panoramic

21

21. Discuss the equipment preparations necessary before exposure of a panoramic projection.

ans

22

22. Discuss the patient preparations necessary before exposure of a panoramic projection.

ans

23

23. Discuss the patient positioning steps necessary before exposure of a panoramic projection.

ans

24

24. Give examples of Frankfort plane positioning errors, and discuss what steps can be taken to correct such errors.

ans

25

25. Discuss the advantages and disadvantages of panoramic imaging.

ans

26

26. Identify the approximate age of the patient in Figure 22-31.

ans

27

27. Identify the approximate age of the patient in Figure 22-32.

ans

28

28. Identify the approximate age of the patient in Figure 22-33.

ans