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WorksheetsDANB Exam Prep
Total questions: 78
Worksheet time: 39mins
Who discovered the x-ray?
Edmund Kells
Franklin McCormack
Wilhelm Roentgen
William Rillins
What is the most important use of radiography in the dental practice?
For therapy
For diagnosis
For patient education
For control of pain
Which form of radiation causes ionization of body tissue cells?
Radar
Radio
X-ray
Microwaves
What metal is used for the target in the x-ray tube?
Copper
Tungsten
Aluminum
Molybdenum
Which of these tissues are believed to have the smallest recovery rate from radiation exposure?
Bone cells
Nerve cells
Reproductive cells
Epithelial cells
During pregnancy, the greatest danger to the embryo is during?
The first trimester
The second trimester
The third trimester
The last month of pregnancy
Which of these tissues that may be in the path of dental radiation is most radiosensitive?
Alveolar bone
Oral mucosa
Lens of the eye
Enamel of the tooth
Which of these is the earliest detectable symptom of excessive radiation exposure?
Erythema
Xerostomia
Alopecia
Dysphagia
Which of these film packets is the largest?
Periapical
Inerproximal
Occlusal
Pediatric
Which of these films is best suited when the dentist requests a radiograph of a specific tooth and the surrounding structures?
Panoramic
Occlusal
Cephalometric
Periapical
Which of these is a facial landmark?
Coronoid process
Glenoid fossa
Tragus
Mylohoid line
Which of these structures appears radiolucent?
Enamel
Dental pulp
Dental pulp dentin
Alveolar bone
Which of these is not a mandibular landmark?
Incisive foramen
Lingual foramen
Coronoid process
Mental symphysis
Which of these structures appears radiopaque?
Maxillary sinus
Maxillary tuberosity
Nasal fossa
Mental foramen
Which of these structures appears most radiopaque?
Trabecular bone
Cementum
Dentin
Enamel
Which of these structures appears radiopaque?
Lamina dura
Oral mucosa
Pulp chamber
Residual cyst
Which of these structures appears radiolucent?
Impacted tooth
Chronic abscess
Calculus
Odontomas
Which of these conditions is caused by insufficient vertical angulation?
Elongation
Overlapping
Foreshortening
Cone cutting
Which of these conditions results from a failure to direct the central ray toward the middle of the film packet?
Cone cut
Foreshortening
Elongation
Overlapping
Which of these indicate that the radiograph was over exposed?
Light image
Reticulation
Dark image
Thin black lines
Which of these is not an intraoral survey?
Interproximal
Occlusal
Panoramic
Periapical
What is the result of incorrect horizontal angulation?
Elongation
Cone cutting
Foreshortening
Overlapping
What is the effect on the radiographic image if the vertical angulation is 15˚ more than is necessary?
Overlapping
Cone cutting
Foreshortening
Elongation
What is the ideal target-film distance for the paralleling technique?
7 inches
8 inches
12 inches
16 inches
Which location along the ala-tragus line is used as a point of entry for the canine exposure?
Tip of the nose
Ala of the nose
Inner canthus of the eye
Out canthus of the eye
How many standard sized films are recommended to make a full interproximal survey of the posterior teeth?
2
4
6
8
Which of these conditions would not be visible on an interproximal radiograph?
Incipient caries
Recurrent caries
Apical abscess
Alveolar crest resorption
Which of these factors will most likely reduce the usefulness of an interproximal radiograph?
Incorrect vertical angulation
Incorrect exposure time
Incorrect horizontal angulation
Vertical film placement
Which of these film sizes is known as the occlusal film?
#1
#2
#3
#4
Which of these describes the imaginary line located halfway between the long axis of the tooth and the plane of the film?
Mylohyoid line
Bisector
Focal spot
Horizontal angulation
To diagnose a Sialolith in the bartholin’s duct, which of these is the best film to use?
A periapical film
An interproximal film
An occlusal film
A panoramic film
What type of film is never used when making an edentulous survey?
Occlusal
Periapical
Panoramic
Interproximal
Which of these conditions is most frequently found during an edentulous survey?
Dental caries
Retained roots
Fractures
Abscesses
In what position should the incisors be in for a panoramic exposure?
The mandibular incisors should protrude
Edge to edge relationship
Maxillary incisors should protrude
It really doesn't matter
One of the most effective ways of protecting yourself from scatter radiation is?
Shielding
Increased kVp
Enlarging the colimator hole
Use of slow film
After the x-ray machine is turned off, x-rays continue to bounce around the room:
For a few seconds
Never they stop instantly
Depends upon the x-ray energy
Depends upon room humidity
Increasing the Kilovoltage of the x-ray machine produces:
More soft x-rays
More gamma rays
Greater colimation
Great penetration
The purpose of filtering the x-ray beam is:
To remove hard, penetration x-rays
To remove soft or low energy x-rays
To reduce the beam diameter
To strain out the electrons
Increasing the Milliamperage of the x-ray machine:
Increases the penetrating power of the x-rays generated
Increase the intensity or number of x-rays generated
Increases the filtration
None of the above
Collimation of the primary beam:
Restricts the size of the beam to the area of interest
Removes soft x-rays from the beam
Enlarges the x-ray beam
Removes hard radiation
In normal dental radiographic procedures, the principle health hazard to the operator is
from:
Direct radiation
Secondary radiation
Gamma radiation
Scatter radiation
Where is the inverted Y formation found?
Where the nasal fossa and the maxillary sinus meet
At the the Tempromandibular joint
In the maxillary molar region
None of the above
Radiographs are the property of:
The financially responsible party
The patient
The lawyer
The dentist
The cathode of the x-ray tube:
Improves the definition
Is the negative terminat
Is the positive terminal
Is quantity of electric current
What is the recommended beam diameter for the aperture located inside the collimator?
3 inches
2 feet
2 3/4 inches
4 inches
X-rays may be used as legal evidence because:
They are evidence of previous conditions
They have been bought and paid for
They are easy to read
They are a record of the age of a patient
When viewing the genial tubercles, you are observing a film in:
The maxillary cuspid
The mandibular incisive
The retromolar area
The maxillary sinus area
The mental foramen is best observed in the:
Mandibular bicuspid area
Maxillary bicuspid area
Maxillary incisive area
Mandibular incisive area
The control should be located at least how many feet from the tube head?
4 feet
6 feet
8 feet
10 feet
Collimators for the dental x-ray machine are usually made of what material?
Copper
Aluminum
Lead
Tungsten
When taking intraoral radiographs, the Sagittal plane of the patient’s head should be:
Horizontal
Parallel
Perpendicular to the floor
None of the above
A technique used to measure the operator’s exposure to radiation is:
To check the color of the operator's fingers
For the operator to ear a radiation film badge
The frequency of stomach pains
There is no way to measure an operator's exposure
The usual number of films in a complete radiographic survey:
10
18
24
30
Exposure of a radiograph on a child:
Requires less time than an adult
Requires more time than an adult
Requires the same time an adult
Should never be taken
Extraoral films are placed in rigid frames called:
Film frames skull plates
Jaw plates
Skull plates
Cassettes
Dental personnel are the same as any other radiation worker. According to the NCRP,
what is the maximum allowable cumulative dose of radiation for a calendar year?
3 rems
5 rems
10 rems
It does not matter
By using the long cone technique, it will reduce patient’s:
Radiation dose
Cost for x-rays
Latent period
Need for x-rays at a later date
What determines the atomic number of an atom?
The number of protons
The number of electrons
The number of atoms
Isotopes
When preparing a patient for a panoramic radiograph, remember to ask the patient to
remove their:
Eye glasses
Hair pins
Earrings
All of the above
When taking a panoramic radiograph, remind the patient to lift the tongue:
To the left side of the mouth
To their palate
Stay flat on their tongue
Will not matter
If the patient is positioned too far forward in the panoramic machine, it will cause:
Superimposition of the cervical spine
Wide anterior teeth
Narrow anterior teeth
Reverse smile line
What can cause a ghost image on a panoramic radiograph?
The patient smiled
Patient's chin was too far forward in the machine
Patients slumped in chair
Patient's chin was tipped too high
How many impulses in 1/6 of a second?
5
10
15
20
Removal of which of the following is required when temporarily leaving the operatory?
Protective clothing
Protective eyewear
Surgical mask
Gloves
What are standard precautions?
The concept that considers all patients to have infections with bloodborne pathogen
The use of the same infection control procedures for all types of health care facilities
The concept that considers that blood and all patients body fluids are potentially infectious
The use of only infection control procedures formally approved by a government agency
All dental professionals must use surgical masks and protective eyewear to protect the
eyes and face:
Only during surgical procedures
Whenever the high-speed handpiece is used
Whenever spatter and aerosolized sprays of blood and saliva are likely
If desired
Which of the following items indicates the highest level of killing power?
Sporicidal agent
Bacteriocidal agent
Virucidal agent
Tuberculocidal agent
The process that kills disease-causing microorganisms but not necessarily all microbial life
is defined as:
Precleaning
Sterilization
Disinfection
Cleaning
When an assistant transfers a microbe from one patient to his or her hand and then to
another patient’s mouth, this transmission is referred to as ___________.
Direct contact
Indirect contact
Airborne transmission
Droplet transmission
A hospital level disinfectant is the same as a(n):
High-level disinfectant
Intermediate-level disinfectant
Low-level disinfectant
Dental only uses dental level disinfectants
To prevent contamination of surfaces, which of the following techniques should be used?
Place utility gloves prior to placement of appropriate surface covers
Apply appropriate surface covers before the surfaces have a chance to become contaminated with patient material
Place each cover surface directly under the cassette so the entire surface is not cluttered with protective covers
Always clean the underlying protected surface with a disinfectant
__________ is considered regulated waste and requires special disposal
Human tissue
Food
Saliva-soaked gauze
Used anesthetic carpule
Before dental x-ray films are exposed, the treatment area must be prepared using:
Antiseptic
Aseptic techniques
Sterilization of critical instruments
Low-level disinfectant
Which of the following may be used for surface disinfectant in the dental office?
Idophors
Ethyl alcohol
Isopropyl alcohol
Ammonia
Which of the following best describes an intermediate-level surface disinfectant?
Sporicidal agent
Bacteriocidal agent
Virucidal agent
Tuberculocidal agent
Chemicals that destroy or inactivate most species of pathogenic microorganisms on
inanimate surfaces are called:
Disinfectants
Sterilants
Antiseptics
Antigermicidal
Which of the following is a special type of microorganism that is highly resistant to heat
and chemicals?
Yeasts
Viruses
Spores
Staphyococci
Which term describes the white areas on the processed radiograph?
Radiopaque
Dansity
Penumbra
Radiolucent
