Quiz #1

Question 0

The range of useful densities seen on a dental radiograph is termed the
A) film contrast
B) subject contrast
C) scale of contrast
D) kilovoltage peak

Answer 0

C) scale of contrast

Question 1

A radiograph that has \_\_\_\_ is said to have low contrast
A) dark overall appearance
B) very light overall appearance
C) many shades of gray 
D) very dark areas and very light areas

Answer 1

C) many shades of gray

Question 2

Which of the following choices would result in an increased magnification of the radiographic image?
A) increased target-film distance
B) decreased object-film distance
C) increased object-film distance
D) both A and B

Answer 2

C) increased object-film distance

Question 3

The film emulsion is composed of a homogenous mixture of
A) calcium tungstate
B) gelatin and barium salt crystals
C) gelatin and silver halide crystals
D) primer and silver halide crystals

Answer 3

C) gelatin and silver halide crystals

Question 4

The identification dot is used to:
A) determine film orientation
B) identify whether or not a film has been exposed
C) indicate the side of the film with emulsion
D) identify whether the film is D-speed or F-speed film

Answer 4

A) determine film orientation

Question 5

What is the purpose of the lead foil sheet found within the film packet?
A) to cover the film and shield the film from light
B) to protect the film from moisture
C) to shield the film from primary radiation emitted by the X-ray tubehead
D) to shield the film from secondary backscattered radiation

Answer 5

D) to shield the film from secondary backscattered radiation

Question 6

A #\_\_ size film is a standard adult periapical film
A) 0
B) 1
C) 2
D) 3

Answer 6

C) 2

Question 7

Which of the following film speed is the fastest film currently available?
A) c-speed film
B) d-speed film
C) e-speed film
D) f-speed film

Answer 7

D) f-speed film

Question 8

Cortical bone is also referred to as
A) trabecular bone
B) spongy bone
C) cancellous bone
D) compact bone

Answer 8

D) compact bone

Question 9

\_\_\_ bone appears predominantly radiopaque, and \_\_\_ bone appears predominantly radiolucent.
A) cortical, cancellous
B) cancellous, corticala
C) trabecular, compact
D) spongy, cortical

Answer 9

D) spongy, cortical

Question 10

A \_\_\_\_ is a tubelike passageway through bone that contains nerves and blood vessels.
A) canal
B) foramen
C) fossa
D) sinus

Answer 10

A) canal

Question 11

A suture is a/n
A) movable joint between any two bones in the body
B) immovable joint between any two bones in the body
C) movable joint between two bones in the skull
D) immovable joint between two bones in the skull

Answer 11

D) immovable joint between two bones in the skull

Question 12

The \_\_\_ is a linear prominence of bone extending from the molar region downward on the internal surface of the mandible.
A) external oblique ridge
B) mylohyloid ridge
C) internal oblique ridge
D) symphysis

Answer 12

B) mylohyloid ridge

Question 13

Which of the following tooth structures is most radiopaque?
A) enamel
B) dentin
C) cementum
D) pulp

Answer 13

A) enamel

Question 14

On a  dental radiographic, the periodontal ligament space (PDL) appears as a \_\_\_ line around the root of the tooth
A) thin radiopaque 
B) thin radiolucent
C) wide radiopaque
D) wide radiolucent

Answer 14

B) thin radiolucent

Question 15

Periapical radiographs must show the entire crowns and roots of the teeth being examined as well as \_\_\_ to \_\_\_ mm beyond the root apices
A) 0.1, 0.5
B) 1.0, 2.0
C) 2.0, 3.0
D) 5.0, 5.0

Answer 15

C) 2.0, 3.0