Dental Radiology Trivia Questions
.
- 1.The harmful effects of radiation on human tissues are
- A.
Immediately exhibited
- B.
Insignificant
- C.
Usually acute
- D.
Cumulative
- E.
Painful
- 2.The protective lead apron must be impregnated with how much lead?
- A.
0.20 mm
- B.
0.22 mm
- C.
0.25 mm
- D.
0.30 mm
- E.
0.35 mm
- 3.You have a patient who had read articles describing the hazards of medical/dental radiation and is not sure about letting you take X-rays on her. Based on what you now know, how could you explain the procedures in a way that would be reassuring?
- A.
You are using a lead apron and lead thyroid shield.
- B.
You are using the long cone paralleling technique.
- C.
You take radiographs only when a need is indicated by clinical examination, not nased on an arbitrary time schedule.
- D.
Both a and b
- E.
All of the above
- 4.What do filters do in the X-ray beam?
- A.
Increase density and short waves
- B.
Reduce density
- C.
Reduce exposure time
- D.
Correct the size of the beam
- E.
Reduce patient radiation dose and remove the long waves
- 5.The X-ray photons generated by the dental X-ray machine have
- A.
The same energy and wavelengths.
- B.
Many different wavelengths
- C.
Only a few energies capable of penetrating dense tissue
- D.
Many different speeds
- E.
None of the above
- 6.What is the recommened collimation of the radiation beam at the patient's skin surface?
- A.
1.5 inches
- B.
2.75 inches
- C.
3.75 inches
- D.
2.75 cm
- E.
Both b and d
- 7.What does the ALARA concept stand for?
- A.
As low as reasonably achievable
- B.
As little as radiation is allowable
- C.
As low as radiation is around
- D.
As long as reasonably allowable
- E.
None of the above
- 8.Which of the following devices is an example of personnel monitoring?
- A.
Film badge
- B.
Pocket dosimeter
- C.
Film ring
- D.
Both a and c
- E.
A, b, and c
- 9.The transfer of energy as it passes through matter is called
- A.
Reproduction
- B.
Cumulative
- C.
Mutation
- D.
Absorption
- E.
Energize
- 10.What is it called when a lead disc is used for the elimination of the peripheral portion of the X-ray beam?
- A.
Filtration
- B.
Collimation
- C.
Elongation
- D.
Ionization
- E.
Absorption
- 11.Which molecular changes occur in a living organsim being struck by photons?
- A.
Molecules break into smaller pieces.
- B.
New bonds form within molecules.
- C.
Molecular bonds are disrupted.
- D.
New bonds form between new molecules.
- E.
All of the above
- 12.What is the correct vertical angulation used when taking a bitewing radiograph?
- A.
0 degrees
- B.
+10 degrees
- C.
-10 degrees
- D.
+30 degrees
- E.
+5 degrees
- 13.In the bisecting the andle technique, where is the vertical angel of the central beam directed?
- A.
Parallel to the film
- B.
Perpendicular to the line bisecting the angel made by the film and the side of the tounge
- C.
Parallel to the long axis of the tooth
- D.
Perpendicular to the line bisecting the angle made by the long axis of the tooth and the film
- E.
Both b and d
- 14.What is true of a full-mouth X-ray series?
- A.
Always has periapical and bitewings
- B.
Has a minimum of 20 films
- C.
Can be replaced by a panoramic film
- D.
Varies in need and number of films according to selection criteria and mouth size
- E.
Both a and d
- 15.In dental radiography, what infection control procedures are included?
- A.
Sterilization
- B.
Disinfection
- C.
Anitspetic agents
- D.
Both a and b
- E.
All of the above
- 16.What is the safest postion for an operator while exposing an intraoral film?
- A.
Behind the head of the X-ray unit
- B.
Behind a lead barrier
- C.
At a 45 degree angle to the opposite side of the patient's head
- D.
Both b and c
- E.
All of the above
- 17.What does immersing the contaminated exposed film packet in a disinfecting solution do?
- A.
Disinfects it
- B.
Destroys the image
- C.
Takes too long
- D.
Makes the images clearer
- E.
None of the above
- 18.What nees to happen wheeen exposing a full-mouth set of radiographs?
- A.
The PID need not be covered with a barrier if gloves are worn
- B.
A film dispenser should be used
- C.
Unexpected film should be kept on the counter in the room
- D.
The exposure button should be covered with a plastic barrier
- E.
None of the above
- 19.Where in the X-ray head does thermionic emission take place?
- A.
Tungsten target
- B.
Tungsten filament
- C.
Step-down transformer
- D.
PID
- E.
Both a and b
- 20.Which radiographic technique records the most accurate image of crowns, roots, and supporting structures?
- A.
Bitewing film
- B.
Panoramic film
- C.
Periapical film
- D.
Occlusal film
- E.
Extraoral film
- 21.The bicuspid/premolar bitewing radiograph should be placed to include which of the following anatomic structures?
- A.
All of the mandibular cuspid
- B.
The distal half of the mandibular cuspid
- C.
The distal half of the maxillary cuspid
- D.
The mesial half of the maxillary first premolar
- E.
The distal half of the mandibular first molar
- 22.What is the primary diagnotic use of a bitewing radiograph?
- A.
Check for unerupted teeth
- B.
Register the appearance of supporting structures such as bone and soft tissue
- C.
Show a crown preparation, placement, and residual excess cement.
- D.
Check the length of the canal for endodontic procedures.
- E.
Check for interproximal decay and crestal bone levels.
- 23.The size-1 film would most likely be used to radiograph which of the following areas on an adult patient?
- A.
Incisors and cuspids
- B.
Maxillary bicuspids
- C.
Mandibular bicuspids if the floor of the mouth is too shallow
- D.
Mandibular bicupids
- E.
Both a and c
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