Dental x-ray film

Question 1

cassette

Answer 1

light tight device used in extraoral radiography to hold the film and intensifying films

Question 2

duplicating film

Answer 2

type of photographic film used to make an identical copy of an intraoral radiograph
is not exposed to xrays because only used in a dark room setting

Question 3

film base

Answer 3

flexible piece of polyester plastic that is constructed to with stand heat, moisture, and chemical exposure
also provides stable support for the emulsion

Question 4

adhesive layer

Answer 4

thin layer of adhesive material that cover both sides of the film base

Question 5

emulsion

Answer 5

coating attached to both sides of the film base by adhesive layer to give film greater sensitivity

Question 6

halide crystals and two types

Answer 6

chemical compound sensitive to radiation or light in dental radiography
silver bromide and silver iodide are the two types

Question 7

protective layer

Answer 7

thin transparent coating placed over the emulsion

Question 8

film speed

Answer 8

amount of radiation required to produce a radiograph of standard density

Question 9

blue sensitivity

Answer 9

must be paired with screens that produce blue light

Question 10

green sensitivity

Answer 10

must be paired with screens that produce green light

Question 11

screened

Answer 11

film that requires the use of a screen for exposure

Question 12

non-screened

Answer 12

extraoral film that does not require the use of screens for exposure
requires more exposure time than does a screened film

Question 13

fluoresce

Answer 13

to emit visible light in the blue or green spectrum

Question 14

latent image

Answer 14

pattern of stored energy on the exposed film; invisible image produced when the film is exposed to xrays and that remains invisible until the film is processed

Question 15

calcium tungstate

Answer 15

have phosphors that emit blue light

Question 16

intensifying screen

Answer 16

device that transfers xray energy into visible light

with the use of intensifying screens, less radiation is required to expose a screen film

Question 17

rare earth screen

Answer 17

have phosphors that are not commonly found in the earth and emit green light

Question 18

what is the advantage f having 2 sides of emulsion on a film

Answer 18

gives the film greater sensitivity to xradiation

Question 19

the smaller the crystals the ____ the film speed

the larger the crystals the ____ the film speed

Answer 19

slower

faster

Question 20

film size 0

Answer 20

for children 5-7 years
used for periapicals
also used to examine the posterior teeth in small children

Question 21

film size 1

Answer 21

for anterior teeth in periapicals with someone who has a small mouth

Question 22

film size 2

Answer 22

used for periapicals
also for bite wings
this is the standard size

Question 23

film size 3

Answer 23

used in bite wings

longer film, but not recommended because can’t get the contacts open

Question 24

film size 4

Answer 24

used for occlusal
very large
4x the size of 2 size film

Question 25

green vs gray plastic coating on film

Answer 25

green=1 film

gray=2 films

Question 26

lead foil

Answer 26

protects film from back scatter

closest to the color side

Question 27

what part of the film is the picture found on

Answer 27

emulsion

Question 28

silver halide crystals absorb ____ and store ____

Answer 28

radiation; energy

Question 29

disadvantage of larger crystals

Answer 29

less detail in image

Question 30

what color does intraoral and extraoral film become when exposed to light

Answer 30

black

Question 31

duplicating has how many sides of emulsion?

Answer 31

one

Question 32

what color does duplicating film get when exposed to more light

Answer 32

gets lighter

Question 33

2 purposes of dental x-ray film processing

Answer 33

1. to convert latent image on film to visible image

2. to preserve the visible image permanently