Dental Radiology Quiz for Students

A dental assistant is preparing to take a periapical radiograph. Which step should be performed to ensure the film is positioned correctly for imaging the apex of the tooth?

• Place the film parallel to the occlusal plane

• Position the film so that the edge is 2-3 mm beyond the incisal or occlusal edge

• Center the film over the crown only

• Place the film perpendicular to the tooth

When mounting dental radiographs, which concept should be applied to correctly identify the patient’s left and right sides?

• Use the dot facing away from you

• Arrange films as if you are facing the patient

• Place all bitewing films on the left

• Ignore the orientation of the dot

A patient presents with a gag reflex during intraoral radiography. Which technique should the dental assistant apply to minimize discomfort and successfully obtain the image?

• Use a larger film size

• Distract the patient with conversation

• Place the film quickly and instruct the patient to breathe through their nose

• Ask the patient to close their eyes

Which adjustment should a dental assistant make if a radiograph appears too light after processing?

• Increase the exposure time for the next image

• Decrease the exposure time for the next image

• Use a smaller film size

• Move the x-ray tube closer to the patient

A dental assistant notices overlapping of teeth on a bitewing radiograph. Which concept should be applied to correct this error in future images?

• Increase the vertical angulation

• Adjust the horizontal angulation of the x-ray beam

• Use a larger film size

• Decrease the exposure time

When using the paralleling technique, which step ensures accurate image reproduction of the tooth and surrounding structures?

• Place the film at an angle to the tooth

• Position the film parallel to the long axis of the tooth

• Use the bisecting angle technique

• Place the film perpendicular to the occlusal plane

A dental assistant is asked to process radiographic films manually. Which concept should be applied to ensure proper development of the images?

• Immerse the film in fixer before developer

• Maintain the developer solution at the recommended temperature

• Rinse the film only after fixing

• Skip the washing step

Which step should a dental assistant take to minimize patient exposure to radiation during dental radiography?

• Use a round collimator

• Use a lead apron and thyroid collar

• Increase the exposure time

• Use a higher kVp setting

A dental assistant is reviewing a radiograph and notices a cone-cut error. Which adjustment should be made to prevent this error in future exposures?

• Center the x-ray beam over the film or sensor

• Increase the exposure time

• Use a larger film size

• Decrease the vertical angulation

When taking an occlusal radiograph, which concept should be applied to ensure the entire arch is captured?

• Use a periapical film

• Place the film flat against the occlusal surfaces

• Position the film vertically

• Use a bitewing holder