Dental RaDiology exam with answeRs 100%
CoRReCt
Radiation ✔✔ Electromagnetic rays that travel as waves of energy through space.
Radiology ✔✔ Science of radiation as used in medicine.
Radiograph ✔✔ Image produced on photosensitive film by exposing film to x-rays and
processing.
Radiation ✔✔ Electromagnetic rays that travel as waves of energy through space.
X-Radiation "X-Ray" ✔✔ High energy ionizing electromagnetic radiation.
What are the two techniques for taking a periapical radiograph? ✔✔ Paralleling - preferred
method using long axis of tooth as focal point AKA Extension-cone parallelling (XCP) & Bisecting
angle
What are the two types of Paralleling devices? ✔✔ Anterior XCP and Posterior XCP
Interproximal BWXs are used to reveal ..... ✔✔ Interproximal caries, certain pulp conditions,
overhanging restorations, improperly fitting crowns, recurrent caries beneath restorations,
resorption of the alveolar bone.
How many films are typically used in the Navy for BWX? ✔✔ 3
FMX (Full Mouth X-Ray) series consists of ..... ✔✔ 18 films - 7 Max, 7 Man, 4 BWX films.
, Occlusal Radiographs are used when ✔✔ fractures of the jaw or gross pathological conditions
are suspected. Holds 2 x-ray films which allow for 2 different developing times allowing
comparision.
Digital radiography uses an electronic sensor and ✔✔ computerized imaging system that
produces x-ray images almost instantly on a computer monitor.
Digital radiography uses dental film. T/F ✔✔ False - it uses a digital sensor which produces x-ray
images instantly on computer.
What are the advantages of digital imaging? ✔✔ Gray scale resolution for increased accuracy,
reduced radiation (50%-80%), faster images, lower equipment costs (no film or processing
costs).
Disadvantages of digitial imaging are: ✔✔ Initial setup costs, quality of images (arguable),
sensor size (some patients find them bulky), Infection control (sensor must protected because it
cannot be heat steralized)
Faulty radiographs are cause by.... ✔✔ incorrect: kVp, mA, time setting, processing procedures,
positioning of film packet and tube head.
Additionaly causes of faulty radiographs are: ✔✔ No Image, Light Image, Dark image, partial
image, blurred image, fogged image, streaked or stained film, reticulation, crescent-shaped
lines, herringbone image, black areas, white spots, foreign object image
FM contains how many PA and BWXs? ✔✔ 14 PAs and 2 to 4 Bitewings
CoRReCt
Radiation ✔✔ Electromagnetic rays that travel as waves of energy through space.
Radiology ✔✔ Science of radiation as used in medicine.
Radiograph ✔✔ Image produced on photosensitive film by exposing film to x-rays and
processing.
Radiation ✔✔ Electromagnetic rays that travel as waves of energy through space.
X-Radiation "X-Ray" ✔✔ High energy ionizing electromagnetic radiation.
What are the two techniques for taking a periapical radiograph? ✔✔ Paralleling - preferred
method using long axis of tooth as focal point AKA Extension-cone parallelling (XCP) & Bisecting
angle
What are the two types of Paralleling devices? ✔✔ Anterior XCP and Posterior XCP
Interproximal BWXs are used to reveal ..... ✔✔ Interproximal caries, certain pulp conditions,
overhanging restorations, improperly fitting crowns, recurrent caries beneath restorations,
resorption of the alveolar bone.
How many films are typically used in the Navy for BWX? ✔✔ 3
FMX (Full Mouth X-Ray) series consists of ..... ✔✔ 18 films - 7 Max, 7 Man, 4 BWX films.
, Occlusal Radiographs are used when ✔✔ fractures of the jaw or gross pathological conditions
are suspected. Holds 2 x-ray films which allow for 2 different developing times allowing
comparision.
Digital radiography uses an electronic sensor and ✔✔ computerized imaging system that
produces x-ray images almost instantly on a computer monitor.
Digital radiography uses dental film. T/F ✔✔ False - it uses a digital sensor which produces x-ray
images instantly on computer.
What are the advantages of digital imaging? ✔✔ Gray scale resolution for increased accuracy,
reduced radiation (50%-80%), faster images, lower equipment costs (no film or processing
costs).
Disadvantages of digitial imaging are: ✔✔ Initial setup costs, quality of images (arguable),
sensor size (some patients find them bulky), Infection control (sensor must protected because it
cannot be heat steralized)
Faulty radiographs are cause by.... ✔✔ incorrect: kVp, mA, time setting, processing procedures,
positioning of film packet and tube head.
Additionaly causes of faulty radiographs are: ✔✔ No Image, Light Image, Dark image, partial
image, blurred image, fogged image, streaked or stained film, reticulation, crescent-shaped
lines, herringbone image, black areas, white spots, foreign object image
FM contains how many PA and BWXs? ✔✔ 14 PAs and 2 to 4 Bitewings
