DEN205 Final Flashcards
Which electrons have the greatest binding energy ?
a. N-Shell
b. M-Shell
c. K-Shell
d. L-Shell
Which describes the primary radiation?
a. Radiation that exits the tube-head
b. Radiation that is created when x-rays that come in contact with matter.
c. Radiation that has been deflected from its path by the interaction with matter.
d. None of the above.
What is the most common cause of unnecessary radiation exposure?
a. Having kVp set too high
b. Using slow speed film
c. Taking an FMX every three years
d. Taking radiographs just because “the patient is due”
Which type of scatter occurs the most often with dental radiographs?
a. Coherent
b. Compton
c. Photoelectric
d. Secondary
If you have a patient thats needs a retake on the mandibular right pre- molars because of overlapping. When you view the image, the overlap is more visible on the mesial of the film compared to the distal of the film. What do you need to correct this error on your next exposure?
a. Correct the vertical angulation, decrease the vertical angulation
b. Correct horizontal angulation, direct the PID more toward the distal
c. Correct horizontal angulation, direct the PID more toward the mesial
d. Correct the vertical angulation, increase the vertical angulation
What is the portion of a dental image that appears dark or black termed?
a. dense
b. radiopaque
c. radiolucent
d. transparent
What is the Maxillary landmark that consist of bony, scroll-shaped plates in the walls of the nasal cavity?
a. nasal conchae
b. nasal sinus
c. nasal septum
d. nasal spine
What is the concept and acronym that states that all exposure to radiation must be kept to a minimum and must protect the operator and patients?
a. As Low As Radiations Allow
b. As Low As Reasonably Achievable
c. Applies Less Accepted Radiation Act
d. Allow Low As Radiation Applies
When exposing an x-ray, what is the name of the location where the x-rays are produced with in the machine?
a. Negative, Cathode
b. Negative Anode
c. Positive Cathode
d. Positive Anode
If an operator is wearing a personal monitoring device, the purpose would be?
a. It monitors how much radiation is given off by nearby sources other than the x-ray machine.
b. It monitors how much radiation is in the entire office.
c. It monitors the quantity of x-rays an operator would take in one 24-hour period.
d. It monitors how much radiation and operator is being exposed to in a given timeline.
What is the penetrating x-ray beam that exits the tube head called?
a. secondary radiation
b. scatter radiation
c. characteristic radiation
d. primary beam
When using an Antiseptic hand wash how long would you wash your hands for?
a. 15 seconds
b. 30 to 40 seconds
c. 25 seconds
d. 60 seconds
What is required when preparing a patient for digital x-ray exposure?
a. adjusting the head rest
b. placement of lead apron
c. adjusting the height of the dental chair
d. all the above
When using the guidelines according to ADA, how should each patient be treated?
a. As potentially infectious
b. As not being a source of infection
c. As infectious based on their suspicious medical history
d. As source of non-communicable disease
Which one of these is a critical instrument?
a. XCP Rinn Ring
b. PID
c. Forceps
d. Sensor
Which statement best describes ionization?
a. The proton in the nucleus exchanges an electron with the neutron, which creates energy.
b. A positive electron exchanges its positiveness for a proton.
c. Electrons are bundled together to create more energy.
d. When an atom loses a negative electron.
Which of the following statements is true of dental images and the patients record?
a. The dental record must include documentation of the number and type of dental images exposed.
b. It is advised to keep patient dental images in a file separate from patient charts.
c. Dental images are an option rather than an integral part of the dental record.
d. Dental images may be discarded when outdated.
Which of the following areas or surfaces on the x-ray machine must be covered or disinfected? 1 = control panel, 2 = exposure button, 3= tube-head, 4= PID
a. 2 only
b. 2, 3, and 4
c. 1, 2, and 3
d. 1, 2, 3, and 4
What is the current MPD for occupationally exposed dental personnel?
a. 2 rad/yr.
b. 5.0 rem/yr.
c. 3.0 rem/yr.
d. 7.0 rem/yr.
The Snap-a Ray, Rinn XCP, Stabe, Precision, and Bite Blocks are all examples of what?
a. film
b. view boxes
c. receptor holders
d. types of dental x-ray machines
In Dental radiography, the term _________ is used to describe the mean energy or penetrating power of the x-ray beam.
a. quantity
b. intensity
c. wavelength
d. quality
When exposing an x-ray which of the following structures would appear the most radiopaque?
a. metallic restorations
b. dental pulp
c. air space
d. periodontal ligament space
The 3 major elements that make up the x-ray machine are:
a. Vacuum tube, high-voltage power source and collimator
b. PID, collimator and operating panel
c. Tube-head, PID and vacuum tube
d. Control panel, high-voltage power source and collimator
When the contrast is too low on a dental image. Tell me what would you need to adjust in order to increase the contrast?
a. increase kV
b. Decrease mA
c. Decrease kV
d. Increase mA
The ALARA concept expresses which of the following:
a. All exposure to radiation must be kept to a minimum
b. Both patient and operator should be protected from unnecessary exposure
c. Both A and B
d. None of the above
Which of the following does a film badge monitor?
a. Total office staff radiation exposures
b. Patient exposures
c. Natural radiation exposures
d. Radiographer’s daily occupational radiation exposures
