Radiology for the Dental Professional 9th Edition by Frommer - Test Bank

Radiology for the Dental Professional 9th Edition by Frommer – Test Bank

 

Instant Download – Complete Test Bank With Answers

 

 

Sample Questions Are Posted Below

 

Frommer: Radiology for the Dental Professional, 9th Edition

 

Chapter 05: Biologic Effects of Radiation

 

Test Bank

 

COMPLETION

 

1. A tissue that lies within the primary dental beam and is very radiosensitive is the ________.

 

ANS: cornea

 

REF: 82

 

2. A tissue that is near the primary beam and receives a lot of secondary radiation is the _________.

 

ANS: thyroid

 

REF: 83

 

3. Radiation damage to somatic cells is ________ passed on to succeeding generations.

 

ANS: not

 

REF: 76-77

 

4. The output of a dental x-ray machine is expressed in ________.

 

ANS: roentgen/sec

 

REF: 73

 

5. The quality factor in measuring x-radiation is ___________.

 

ANS: one

 

REF: 74

 

MULTIPLE CHOICE

 

1. Which of the following factors affects the response to radiation?

a.	dose rate
b.	total dose
c.	age
d.	cell sensitivity
e.	all of the above

 

ANS: E                    REF: 78

 

2. A free radical:

a.	is a uncharged molecule
b.	is unstable
c.	has an unpaired electron in the outer shell
d.	combines with molecules to form toxins
e.	all of the above

 

ANS: E                    REF: 71

 

3. The single largest contributor to background radiation is:

a.	medical and dental radiation
b.	radon
c.	cosmic radiation
d.	nuclear plants
e.	soil

 

ANS: B                    REF: 81

 

4. The threshold erythema dose for skin is:

a.	3000 R
b.	250 R per 14-day period
c.	100 mR per week
d.	250 mR
e.	none of the above

 

ANS: B                    REF: 82

 

5. Radiation caries is most often seen on teeth:

a.	interproximally
b.	on occlusal surfaces
c.	at the cervical area circumferentially
d.	on the incisal edges
e.	around crowns

 

ANS: C                    REF: 85

 

6. Identify this type of interaction with matter: an x-ray photon has its path altered by the atom, but no change to the atom occurs; a photon of scatter radiation is produced.

a.	no interaction
b.	Thompson scatter
c.	photoelectric effect
d.	Compton effect

 

ANS: B                    REF: 70

 

7. Identify the type of interaction with matter that occurs most frequently with dental radiation procedures:

a.	no interaction
b.	Thompson scatter
c.	photoelectric effect
d.	Compton effect

 

ANS: D                    REF: 70

 

8. Describe the event when x-ray photons directly hit critical areas with the cells and cause damage to the DNA of the cells:

a.	indirect effect
b.	ionization
c.	direct effect
d.	formation of toxins

 

ANS: C                    REF: 72

 

9. All of the following are traditional units of radiation measurement EXCEPT:

a.	roentgen
b.	gray
c.	radiation absorbed dose
d.	roentgen equivalent man

 

ANS: B                    REF: 72

 

10. Identify the time between exposure to ionizing radiation and the appearance of clinical symptoms:

a.	latent period
b.	short-term effect
c.	somatic effect
d.	genetic effect

 

ANS: A                    REF: 78

 

11. To further protect our patients from excessive exposure to radiation in dental procedures, the ADA recommends the use of:

a.	F-speed film and/or digital sensors
b.	the use of selection criteria in ordering radiographic exams
c.	rectangular collimation
d.	all of the above

 

ANS: D                    REF: 79

 

12. The total body radiation dose from a four bitewing examination utilizing E-speed film and rectangular collimation is approximately:

a.	1 hour of background radiation
b.	12 hours of background radiation
c.	2 weeks of background radiation
d.	1 month of background radiation

 

ANS: B                    REF: 81

 

13. All of the following tissues are considered radiosensitive EXCEPT:

a.	lens of the eyes
b.	thyroid gland
c.	nerve tissue
d.	reproductive cells

 

ANS: C                    REF: 82-83

 

14. Identify the largest source of artificial radiation to which the population is exposed:

a.	medical and dental radiation
b.	consumer products
c.	nuclear accidents
d.	solar radiation

 

ANS: A                    REF: 68

 

15. Human tissue is composed primarily of:

a.	water
b.	air
c.	ions
d.	toxins

 

ANS: A                    REF: 71