The type of radiograph that would show the whole tooth including the crown, roots, and jawline is called:
a. Bitewing x-ray
b. Periapical x-ray
c. Occlusal x-ray
d. Tomogram Correct Answer: b. Periapical x-ray
A bitewing radiograph is useful for diagnosing all of the following EXCEPT:
a. I...
RHS Exam Study Guide Questions &
Answers | Dental Assisting
The type of radiograph that would show the whole tooth including the crown, roots, and jawline is called:
a. Bitewing x-ray
b. Periapical x-ray
c. Occlusal x-ray
d. Tomogram Correct Answer: b. Periapical x-ray
A bitewing radiograph is useful for diagnosing all of the following EXCEPT:
a. Impacted tooth
b. Tooth decay
c. Periodontal bone loss
d. Gum disease Correct Answer: a. Impacted tooth
A full-mouth survey generally includes:
a. 14 periapical views and 4-6 bitewings
b. 10 periapical views and 8 bitewings
c. 14 periapical views and 4-6 bitewings and a panoramic
d. 8 periapical views and 4 bitewings Correct Answer: a. 14 periapical views and 4-6 bitewings
The best radiograph to obtain for diagnosis of temporomandibular joint (TMJ) is:
a. Panoramic
b. Periapical
c. Sialography
d. Arthrography Correct Answer: d. Arthrography
What type of radiograph is used by an orthodontist to assist with treatment planning?
a. Tomography
b. Sialography
c. Cephalometric
d. Occlusal Correct Answer: c. Cephalometric
Which of the following is a true statement regarding the use of lead aprons and thyroid collars?
a. The use of lead aprons and thyroid collars will prevent cancer from developing in the thyroid gland
b. The apron should cover from the neck to just above the patient's knees
c. Lead aprons should be cleaned thoroughly and folded in thirds between patient use
d. The thyroid collar is optional for older adults past childbearing years Correct Answer: b. The apron should cover from the neck to just above the patient's knees
Where is the most appropriate place to store dental film?
a. In a cool, dry closet b. In a refrigerator
c. In the treatment room
d. Near the x-ray machine Correct Answer: a. In a cool, dry closet
A dental assistant experiences an occupational exposure. A patient's blood has splashed into the employee's eye. Which of the following is an appropriate step to take?
a. Immediately draw blood from the patient in order to get it tested for HIV and HBV
b. Require the employee to have their blood tested immediately for HIV and HBV
c. Document the incident, including the source individual, the employee, route of exposure, and how it happened
d. Check the patient's chart and determine if risk factors are present to warrant further testing for the employee Correct Answer: c. Document the incident, including the source individual, the employee, route of exposure, and how it happened
Which of the following is FALSE regarding handwashing?
a. Alcohol-based hand gel can be used in place of soap and water on hands that are visibly dirty
b. Fingertips, thumbs, and between fingers are 3 areas that are frequently not cleaned thoroughly with handwashing
c. Alcohol-based hand gel or foam should have a concentration of 60%-95% alcohol
d. Cool water should be used to rinse hands after washing because it helps to close the pores in the skin Correct Answer: a. Alcohol-based hand gel can be used in place of soap and water on hands that are visibly dirty
A new patient has recently moved to the area and arrives for her first appointment in the dental practice. She is 6 months pregnant. She is complaining of a toothache. She does not bring dental records with her. Which of the following would be the most appropriate for obtaining dental x-
rays?
a. Obtain a full mouth survey as well as a panoramic in order to establish a baseline
b. Only x-ray the area she is complaining about using the lead apron and thyroid collar for protection
c. Hold off on any x-rays because of the pregnancy
d. Obtain a full set of bitewing x-rays to check for other areas of concern using the lead apron Correct Answer: b. Only x-ray the area she is complaining about using the lead apron and thyroid collar for protection
What is the name of the device used to monitor employees for radiation exposure?
a. Radiographometer
b. Oximeter
c. Holter monitor
d. Dosimeter Correct Answer: d. Dosimeter
For intraoral x-rays, what film speed is the fastest and reduces the amount of patient exposure to radiation?
a. A-speed
b. D-speed
c. F-speed
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