Term
| What is the receptor for not digital x-rays? |
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Definition
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Term
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Definition
| A picture or likliness of an object |
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Term
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Definition
| Something that responds to a stimulus |
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Term
| What are the 4 components that make up film? |
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Definition
1.Film base(innermost layer)
2.Adhesive layer
3.Film emulsion
4.Protective Layer(outermost layer) |
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Term
| How thick is the film base? |
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Definition
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Term
| What is the function of the film base? |
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Definition
| Provides strength and stable support for the delicate emulsion |
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Term
| What is the function of the adhesive layer? |
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Definition
| Attaches the emulsion to the base |
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Term
| What is the layer of film that is sensitive to x-ray photons? |
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Definition
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Term
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Definition
| A homogenous coating with a mixture of gelatin and silver halide crystals attached to both sides of the film base |
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Term
| What is film emulsion made of? |
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Definition
| gelatin and halide crystals |
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Term
| What is gelatin used for? |
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Definition
| Used to suspend and disperse millions of microscopic silver halide crystals over the film base |
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Term
| What do the halide crystals do? |
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Definition
The silver halide crystals absorb radiation during exposure and store the energy
*gives whites and blacks* |
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Term
| What is the function of the protective layer? |
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Definition
| A thin coating over the emulsion to protect the emulsion from damage |
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Term
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Definition
| Stored energy forms a pattern known as the latent image, before you process the film |
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Term
| What produces the latent image? |
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Definition
| silver halide crystals contain various levels of stored energy, depending on the density of the objects in the area exposed |
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Term
| When can the latent image be seen? |
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Definition
| When chemical processing takes place to produce a visible image |
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Term
| What happens to silver bromide crystals when photons strike the emulsion? |
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Definition
| some are exposed and other are not |
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Term
| What happens to exposed crystals and the silver bromine atoms? |
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Definition
| The become ionized and the silver bromine atoms are separated |
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Term
| What are the three types of film? |
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Definition
1.intraoral
2.extraoral
3.duplicating |
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Term
| What does intraoral film packaging do? |
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Definition
| used to protect the film from light and moisture, light seals the film |
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Term
| What information does the box of film give you?(6 things) |
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Definition
1.Type of film
2.film speed
3.film size
4.number of films per packet
5.total number of films enclosed
6.expiration date |
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Term
| What does the film speed tell you? |
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Definition
| size of the bromide crystals |
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Term
| What are the four components of intraoral film packaging? |
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Definition
1.X-ray film
2.paper film wrapper
3.lead foil sheet
4.outer package wrapping |
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Term
| When is a double film packet used? |
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Definition
| When duplicate radiographs are indicated |
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Term
| What is a paper film wrapper? |
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Definition
A black protective sheet to cover the film and protect it from light
-looks and feels like black construction paper |
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Term
| Where is the lead foil sheet located? |
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Definition
| behind the film wrapped in black protective paper |
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Term
| What does the foil sheet do? |
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Definition
| shields the film from back(scattered) radiation that creates film fog |
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Term
| What has a pattern that is visible on a reversed film? |
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Definition
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Term
| WHat is the outer package wrapping made of and what is its purpose? |
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Definition
| Soft vinyl or paper to seal the contents and protect them from light or moisture |
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Term
| What is the "tube" side of film? |
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Definition
the front side that faces tubehead during exposure.
-raised bump on this side |
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Term
| What does the color code of the label side tell you about the film? |
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Definition
| if it is one or two film and its speed |
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Term
| What are the three types of intraoral film? |
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Definition
1.Periapical
2.Bite-wing
3.Occlusal |
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Term
| What is periapical film used for? |
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Definition
| To examine entire tooth and 2mm of supporting bone |
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Term
| What is bite wing film used for? |
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Definition
| to examine the crowns of the maxillary and mandibular teeth on one film, want open contacts |
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Term
| What is an occlusal film used for? |
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Definition
| to exam large areas of the maxilla or mandible, identify developing teeth |
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Term
| What are the different intraoral film sizes? |
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Definition
| 0,1,2,3(don't use anymore),4 |
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Term
| What sizes are used in periapical film and for who/where? |
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Definition
0: used for small children
1: used for anterior teeth in adults
2: standard film, used for anterior and posterior teeth in adults |
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Term
| What sizes are used in bite-wing film and for who/where? |
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Definition
0: used for posterior teeth in small children
1: positioned vertically to examine anterior teeth in adults
2: used horizontally or vertically to examine posterior teeth in adults |
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Term
| What purpose did size 3 film serve? Why is it no longer recommended? |
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Definition
| Used in bite-wing to show all posterior teeth on one side of the arch but no longer recommended because you were unable to achieve open contacts for both premolars and molars |
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Term
| What size is used in occlusal film? |
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Definition
| 4: used to examine large areas of the maxilla or mandible, almost 4 times the size of standard #2 film |
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Term
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Definition
| The amount of radiation required to produce a radiograph of standard density |
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Term
| What is film speed determined by?(3) |
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Definition
1.the size of the silver halide crystals
2.the thickness of emulsion
3.the presence of special radio sensitive dyes |
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Term
| Does fast film require more or less radiation exposure? |
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Definition
| the faster the film speed is, the less radiation is needed |
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Term
| What are the speeds available for intraoral film? Which is no longer available? What do we use? |
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Definition
| D and F are avalaible, E film is no longer on the market, we use F |
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Term
| F film speed requires how much percent of the exposure time as D speed film? |
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Definition
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Term
| What is extraoral film and what is it used form? |
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Definition
| film used outside of the mouth used to examine large areas of the skull or jaws |
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Term
| What are the two types of extraoral film? |
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Definition
1.Panoramic
2.Cephalometric |
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Term
| What does panoramic film capture? |
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Definition
| wide view of upper and lower jaws |
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Term
| What does cephalometric film capture? |
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Definition
| bony and soft tissue areas in the profile(from the side) |
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Term
| What are the two types of extraoral film? |
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Definition
1.Screen film
2.Nonscreen film |
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Term
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Definition
| -requires use of a screen in a cassette with phosphors for exposure |
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Term
| What is screen film sensitive to? |
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Definition
| sensitive fluorescent light rather than direct exposure to radiation |
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Term
| What are the two lights that some screen films are sensitive to? |
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Definition
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Term
| What is nonscreen film? Is it used in dentistry? |
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Definition
| does not require the use of a screen, it is exposed directly to x-rays, not used in dentistry |
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Term
| What are two things screen films are used with? |
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Definition
| intensifying screen and cassettes |
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Term
| What do intensifying screens do? |
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Definition
| transfers x-ray energy into visible light, this exposes the screen film and |
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Term
| What is the film in screen film sensitive to? |
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Definition
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Term
| What are the two types of lights that screen film could be sensitive to? |
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Definition
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Term
| What is nonscreen film sensitive to? |
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Definition
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Term
| Is nonscreen film used in dentisty? |
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Definition
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Term
| Which type of extraoral film requires the use of a cassette? |
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Definition
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Term
| What do intensifying screens do? |
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Definition
| transfers x-ray energy into visible light, this visible light exposes the film |
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Term
| What is screen film secured in a cassette with? |
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Definition
| between two intensifying screens |
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Term
| What do intensifying screens look like and what are they covered with? |
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Definition
| smooth plastic sheet coated with fluorescent crystals called phosphors |
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Term
| What are the two types of intensifying screens? |
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Definition
1.calcium tungstate screen
2.rare earth screen |
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Term
| What color are calcium tungstate screens? |
|
Definition
| have phospors that emit blue light |
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Term
| What color are rare earth screens? |
|
Definition
| have phosphors that emit green light |
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Term
| Which type of intensifying screen requires less radiation? |
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Definition
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Term
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Definition
| houses the film and intensifying screens, it is light tight and holds the intensifying screens in contact with the film |
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Term
| What happens if in a cassette that the intensifying screen and film aren't in contact? |
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Definition
| the image will lack sharpness |
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Term
| Why do cassettes have a plastic front cover? |
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Definition
| to allow photons to pass through it |
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Term
| Why do cassettes have a metal back cover? |
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Definition
| to reduce scatter radiation |
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Term
| What is the cassette marked with for orientation? |
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Definition
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Term
| What is duplication film used for? |
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Definition
| to make copies of the original, used for referrals and for the submission of insurance claims |
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Term
| The longer duplicating film is exposed the ? the film will be. |
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Definition
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Term
| Where is the emulsion located on duplicating film? |
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Definition
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Term
| If duplicating film exposed to x-rays? How is it exposed? |
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Definition
| no, must use duplicator equipment and white light to expose it |
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|
Term
| What are three things that film is effected by? |
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Definition
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|
Term
| Where should film be stored? |
|
Definition
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