DANB RHS

The dense radiopaque band that outlines the edge of a mandibular image is the

inferior border

What radiographic technique is recommended for a patient with a shallow palate?

bisecting

Which organization regulates the manufacturing and installation of x-ray equipment?

federal government

Which organization regulates disinfectants and chemical sterilants?

EPA (Environmental Protection Agency)

What causes light-colored radiographs?

underexposure

When taking an occlusal radiograph, the PSP packet should extend from the patient's mouth by approximately

1/8-1/4 inches

Leakage radiation is any radiation that is from what?

from the primary beam

Which radiolucency may be mistaken for caries?

cervical burnout

Which landmark is seen in a maxillary anterior periapical image?

incisive foramen

If a patient's gag reflex is stimulated during the radiographic procedure,

apply distraction techniques to divert his or her attention

Which size image receptor is used for an adult posterior periapical film?

2

The most important responsibility of the dental radiography operator is

implementing ALARA principle

How do most carious lesions appear on an image?

radiolucent

The total destruction of microorganisms and spores on reusable instruments is accomplished by

sterilization

The Frankfort Plane is an imaginary plane passing through the

external auditory meatus to the floor of the orbit

What is the time between patient exposure to radiation and the appearance of biological damage called?

latent period

What are common uses for a CBCT 3D image?

determining bone structure and tooth orientation

Contrast in a digital image is primarily controlled by

kVp

The edentulous radiographic series may include all the following EXCEPT

bitewings

Foreshortening of the maxillary radiographic image results from

increased vertical angulation

The most common radiographic exposure used to evaluate a dental implant on an adult is

periapical

Before exposing radiographs on a minor,

obtain consent from parent or legal guardian

What is the primary function of collimation?

restrict the size of the beam

Who is most susceptible to radiation damage?

infants

Which cells exposed to radiation may be associated with leukemia?

somatic

The Buccal Object Rule is used to determine if a foreign body is located in which direction?

lingual to buccal

A panoramic image appears to have a "reverse smile" when the

Frankfort plane is angled upward

What influences the sharpness of a radiograph?

focal spot size

On a computer template for an image, what is automatically labeled?

Date of image

What affects the number of x-rays being emitted from the tubehead?

ma

The most common reason for taking bitewing radiographs is to evaluate

interproximal caries

What helps decrease the exposure of the thyroid gland from the primary radiation beam?

paralleling technique

Supernumerary teeth are best detected using what type of image receptor?

panoramic

What effect can be caused when exposed to radiation?

Radiation has the potential to cause harmful biologic changes

What is the most common radiographic exposure used to detect periodontal disease?

bitewing

What are acceptable methods for processing digital sensors between patient use?

Using barriers and disinfecting with appropriate wipes

Compared to radiopaque structures, radiolucent structures

appear dark on a radiograph

To assist the patient in controlling the gag reflex,

use a distraction technique

To view an abscess on tooth #25, the best radiographic exposure is a/an

periapical

Which item best protects the dental team member from cross-contamination while exposing radiographs?

gloves

The annual maximum accumulated dose (MAD) of radiation for dental assistant is based on which of the following calculations?

Age minus 18 times 5 rems/year

Which lesions appear radiopaque?

Sclerotic bone

Which tissues is the most highly radiosensitive?

skin

On a full mouth series with eighteen images, how many anterior images are exposed?

6

ALARA is primarily concerned with the radiation that is

artificial

What affects the speed of the electrons emitted from the tubehead?

kVp

Compared to the paralleling technique, a disadvantage of the bisecting angle technique is

image distortion

The median palatal suture is visible on which images?

Maxillary anterior periapical

The most important step the dentist can take in protecting patients from x-radiation is to

properly prescribe radiographs

Which landmark is useful when mounting images of the mandibular posterior area?

mental foramen

What results in a double image on a PSP radiograph?

Exposing the same PSP twice

If a dental assistant dosimeter badge report indicates exposure to radiation, what should be done first?

Evaluate the x-ray equipment and techniques

When exposing radiographs, what is the minimum distance the operator should stand from the tube head?

6 feet

What causes elongation?

Incorrect vertical angulation

After using a lead apron on a patient, it should be

wiped with intermediate disinfectant

Which extraoral radiograph is used to evaluate impacted teeth, large lesions and fractures of the mandible?

Lateral jaw projection

What is a long-term effect of radiation?

genetic defects

According to the inverse square law, when changing the PID length from 8 to 16 inches, the beam's intensity is

1/4 as intense

Which PID reduces patient radiation exposure by up to 70 percent when compared to a round position-indicating device?

rectangular shaped

What is the purpose of a rectangular collimator?

Reduce radiation to the patient

Dental healthcare personnel can BEST shield themselves from radiation during patient exposure by standing behind

a drywall barrier

Phosphor plates are processed by using

Laser beam technology

Patients receive less radiation when using a/an

Rectangular PID

When using a 16-inch PID instead of an 8-inch PID, the exposure time must

be increased

When should gloves be worn while taking radiographs?

wear when placing receptor into the mouth

Before exposing dental radiographs on a visually impaired patient,

use touch to explain the equipment and procedure

If a patient has a cough or cold, what PPE should the operator wear while exposing digital radiographs?

Mask, eye protection, gloves

Personnel monitoring for radiation exposure is done by

wearing a dosimeter

Which measurement of force refer to the potential difference between two electrical charges?

voltage

The most commonly used radiographic exposure for a 3-year-old patient is a

bitewing

Which sequence best describes radiation injury to tissue?

Latent period, period of injury, period of recovery

What is observed on a panoramic radiograph when the patient's chin is tipped down?

Exaggerated smile

Countertops that may have been contaminated should be cleaned with an EPA-registered

intermediate level disinfectant

The degree of radiation injury can be determined by the amount of

Tissue irradiated

When placing periapical images in a template, what information helps to distinguish maxillary molar images from mandibular molar images?

The maxillary sinus outline is visible

What is the advantage of using digital radiography?

Reduces the radiation to patient

If there are no teeth to serve as guides, which landmark indicates a maxillary molar area radiograph?

tuberosity

During patient exposure, protection from radiation for the operator includes

standing behind a wall

What can cause a radiopaque artifact on a radiograph?

Metallic partial denture

Compared to a dentulous patient, radiographic exposure time on an edentulous adult patient should

decrease

Which landmark is located by the midline of the mandible?

genial tubercles

Which describes a double-ended PSP holder used for posterior and anterior teeth?

Eezee-Grip

A full mouth series of periapical images taken on an edentulous patient will consist of

six anterior and eight posterior

What prevents x-rays from escaping the tubehead?

Leaded-glass housing

What was established to address the education and certification of radiographic equipment operators?

Consumer-Patient Radiation Health and Safety Act

Which of the following should be used to prevent cross-contamination of exposure buttons?

plastic cover

To reduce patient anxiety about radiographic exposure,

take time to explain the procedure

The most common artificial radiation exposure comes from

Medical radiation

To desensitize the tissue prior to image receptor placement,

rub a finger along the tissues where the receptor touches

Prevent cross-contamination by wiping the countertop with

an EPA-approved disinfectant

When changing the 8-inch PID to a 16-inch PID, what is used to determine the intensity of the beam?

inverse square law

Which protection technique is used to minimize x-radiation exposure to the operator?

Structural shielding

The aluminum disc in the x-ray tubehead

filter out long wave x-rays from the primary beam

Processed PSP plates should be handled by the edges to prevent

scratches

Blurred radiographic images are often caused by

patient movement during exposure

What position-indicating device (PID) shape most effectively reduces patient exposure to radiation?

rectangular

When the contact area of one tooth is superimposed over the contact of another on a radiograph, it is called

overlapping

What may cause unnecessary radiation exposure to the patient?

Radiograph technique errors

Which landmark is useful when mounting images in the maxillary posterior area?

Floor of the maxillary sinus

Which radiolucent landmark is useful when mounting images in the mandibular anterior area?

lingual foramen