Deck 16: Oral Radiography

Question 1

Which sequence promotes infection control during film exposure?

A) Place the lead apron, wash and dry hands, seat the patient, don gloves
B) Wash and dry hands, don gloves, place the lead apron, seat the patient
C) Seat the patient, place the lead apron, wash and dry hands, don gloves
D) Don gloves, seat the patient, place the lead apron, wash and dry hands

Answer 1

Seat the patient, place the lead apron, wash and dry hands, don gloves

Question 2

Which is associated with incorrect vertical angulation?

A) Cone cut
B) Foreshortening
C) Overlapped contacts
D) Radiolucent shadow

Answer 2

Foreshortening

Question 3

The image receptors in a solid-state digital imaging system:

A) can be wireless or wired with a fiberoptic cable
B) are thin flexible plates coated with phosphor crystals
C) absorb x-ray electrons and release this energy as light
D) are scanned to convert the latent image into a digital image

Answer 3

can be wireless or wired with a fiberoptic cable

Question 4

Which is the most common film holder used to position and hold the dental x-ray film?

A) Snap-A-Ray
B) Rinn XCP
C) SUPA foam blocks
D) Adhesive bite tabs

Question 5

Bite-wing radiographs are NOT used to detect:

A) abscessed teeth
B) periodontal disease
C) interproximal caries
D) pathologic pulpal conditions

Question 6

Which party owns the dental radiographs?

A) Patient or legal guardian
B) Insurance company
C) Dentist
D) State

Question 7

The correct assembly of XCP for an anterior exposure is:

A) blue
B) yellow
C) red
D) green

Question 8

The exposure of dental radiographs should be documented in the chart to include the:

A) type of film holder used
B) processing method and temperatures of solutions
C) time the radiographs were exposed
D) number and type of radiographs exposed

Question 9

The most frequently used film size for adult intraoral imaging is size:

A) 0
B) 2
C) 3
D) 4

Question 10

Which film placement guideline is legitimate?

A) Posterior films are placed vertically
B) Tabbed side of the film packet faces the teeth
C) Film is centered over the areas to be examined
D) Identification dot is positioned to the distal (dot to distal)

Question 11

Which is NOT true regarding infection control in dental radiography?

A) Barriers should be used on all surfaces that cannot be easily cleaned and disinfected.
B) Barriers are placed over switches to prevent electrical shorts.
C) Barriers do not need to be used, because spatter of blood and saliva is unlikely.
D) Barriers that cover the film packet are removed before entering the darkroom.

Question 12

The paralleling technique is preferred in the presence of which anatomic anomaly?

A) Long lingual frenum
B) Large mandibular tori
C) Shallow palate
D) Small mouth

Question 13

To correct an elongated image on a radiograph, the vertical angulation needs to be:

A) increased
B) decreased
C) lowered
D) flattened

Question 14

Informed consent for radiographic exposure includes:

A) assigning legal ownership for the impending radiographs
B) explaining the risks and benefits of dental radiographs
C) positioning the patient before exposing the radiographs
D) documenting the information obtained by the radiographs

Question 15

Incorrect horizontal angulation of the PID results in:

A) elongation
B) foreshortening
C) blurred images
D) overlapped contact areas

Question 16

How many bite-wing films are usually taken for an adult patient?

A) Two
B) Four
C) Six
D) Eight

Question 17

The bite-wing film shows:

A) unerupted teeth
B) impactions and supernumerary teeth
C) the crowns of maxillary and mandibular teeth
D) the entire tooth plus 3 to 4 mm beyond the apices

Question 18

Which is NOT a use for panoramic radiographs in dentistry?

A) Location of impacted teeth
B) Diagnosis of decay, periodontal disease, or periapical lesions
C) Detection of lesions and fractures of the jaw
D) Observation of tooth eruption patterns

Question 19

Which is the correct order of steps in manual processing?

A) Fix, rinse, develop, and wash
B) Develop, rinse, fix, and wash
C) Wash, fix, develop, and rinse
D) Rinse, develop, wash, and fix

Question 20

Occlusal views are best suited to which purpose?

A) Diagnosing recurrent dental caries
B) Guiding endodontic and oral surgery procedures
C) Viewing the crowns of both arches on one film
D) Locating fractures of the maxilla or mandible

Question 21

Match each anatomic landmark with the type of exposure on which it would be visible.

Upper molar exposure

A)Median palatine suture
B)Maxillary sinus
C)Mental foramen
D)Mylohyoid ridge and ramus
E)Zygomatic process

Question 22

A plastic bag or _____ is used to carry contaminated films to the processing area.

Question 23

Which teeth should be seen on a premolar bite-wing radiograph?

Question 24

Which positioning error produces a white shadow over the middle of a panoramic radiograph?

Question 25

The American Dental Association (ADA) recommends mounting radiographs with the dot ____.

Question 26

The panoramic film is placed in a ____ to protect it from light.

Question 27

Which positioning error creates a distorted panoramic image?

Question 28

The film/sensor is placed in a ________ position for anterior projections.

Question 29

When exposing a molar bite-wing radiograph, the ____________ molar should be centered.

Question 30

The most critical error on bite-wing radiographs is caused by incorrect _________.

Question 31

Which positioning error produces a blurred panoramic image?

Question 32

What is the preferred method of infection control when using a digital sensor?

Question 33

When using films with a plastic barrier, how should the protective barrier be removed?

Question 34

Which positioning error superimposes a radiolucent shadow over the apices of the maxillary teeth on a panoramic radiograph?

Question 35

Which describes the most effective way to erase a phosphor storage plate (PSP)?

A) Leave the PSP in a lightproof drawer or safe-box for 8 to 12 hours before reusing
B) Set the PSP, phosphor side up, on a paper towel in the darkroom under a red safelight
C) Place the phosphor side of the PSP on a bright dental view box for 1 to 2 minutes
D) Submerge the PSP in ultrasonic cleaner solution and process for 5 minutes

Question 36

Image plates are protected from scratching and contamination by using ____.

Question 37

Match each anatomic landmark with the type of exposure on which it would be visible.

Upper cuspid/premolar exposure

A)Median palatine suture
B)Maxillary sinus
C)Mental foramen
D)Mylohyoid ridge and ramus
E)Zygomatic process

Question 38

Which advantage is associated with panoramic radiography?

A) Reduced radiation exposure
B) Improved affordability
C) Exceptional image sharpness
D) Minimal distortion

Question 39

Film fog occurs when the:

A) film is placed backwards in the film holder
B) patient, film, or tubehead moves during exposure
C) film packet bends, enabling improper angulation of the central ray
D) dental film is stored in a room where radiographic procedures are performed

Question 40

Conventional film is placed so that the raised dot is facing the ______. (Answer with acronym.)

Question 41

An intraoral film is composed of a black paper wrapper.

Question 42

A panoramic image is an extraoral x-ray that the dentist uses to view the entire dentition and related structures on a single large film.

Question 43

One of the disadvantages of using digital radiographs is the slow speed at which the image is recorded on the computer.

Question 44

A complete full-mouth series can consist of as few as 10 films and as many as 18 films.

Question 45

Match each anatomic landmark with the type of exposure on which it would be visible.

Upper anterior exposure

A)Median palatine suture
B)Maxillary sinus
C)Mental foramen
D)Mylohyoid ridge and ramus
E)Zygomatic process

Question 46

In developing films in digital radiography, the solution temperatures are an important factor.

Question 47

The longer the duplicating film is exposed to light, the darker the film will become.

Question 48

Match each anatomic landmark with the type of exposure on which it would be visible.

Lower molar exposure

A)Median palatine suture
B)Maxillary sinus
C)Mental foramen
D)Mylohyoid ridge and ramus
E)Zygomatic process

Question 49

The sensor used in digital radiography must be sterilized in the autoclave after each use.

Question 50

When using the paralleling technique, the film must be positioned parallel to the long axis of the tooth in a film holder placed away from the teeth and toward the middle of the mouth.

Question 51

The most common causes of automatic processor breakdown are the failure to keep the rollers clean and inadequate replenishing of chemicals.

Question 52

Units with a daylight loading capability have the advantage of not requiring a darkroom.

Question 53

The role of the computer in digital radiography is to store the incoming electronic signal and convert it from the sensor to shades of gray that are viewed on the computer monitor.

Question 54

The point of entry refers to the placement of the film packet in relation to the film holder.

Question 55

The latent image on a film becomes visible after the film is processed in a darkroom.

Question 56

Automatic film processing significantly reduces processing time.

Question 57

The temperature of the developer in an automatic processor must range from 50° F to 75° F.

Question 58

Match each anatomic landmark with the type of exposure on which it would be visible.

Lower premolar exposure

A)Median palatine suture
B)Maxillary sinus
C)Mental foramen
D)Mylohyoid ridge and ramus
E)Zygomatic process

Question 59

Digital radiography exposure times are 50% to 80% less than conventional radiography times.