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50 Cards in this Set
- Front
- Back
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A beam of energy that has the power to penetrate substances and record image shadows on photographic film
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X-Ray
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A picture on film produced by the passage of x-rays through an object or body
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Radiograph
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Something that occupies space and has weight
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Matter
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The art and science of making radiographs by the exposure of film to x-rays
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Radiography
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A form of energy carried by waves or a stream of particles
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Radiation
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A high energy radiation produced by the collision of a beam of electrons with a metal target in an x-ray tube
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X-radiation
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The portion of a processed radiograph that is dark or black; readily permits the passage of the x-ray beam and allows more x-rays to reach the film
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Radiolucent
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The portion of the processed radiograph that is light or white; this type of structure is one that resists the passage of the x-ray beam and limits the amount of x-rays that reach the film
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Radiopaque
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The capacity for doing work
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Energy
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Name 4 reasons why we need radiographs of patients teeth
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1) Can see underneath tissue and the height of bone between each tooth
2) Detect cavities, disease, cysts, trauma 3) Detect unerupted teeth, impacted teeth 4)Check growth and development |
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This type of film is intraoral and shows around the apex of the tooth (shows very tip of root and the crown)
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Periapical
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The most common type of film that shows decay and cavities and has a wing/tab that the patient bites on, also shows the crowns of the molar and premolar on one side of the mouth
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Bitewing
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Inside the mouth
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Intraoral
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Outside the mouth
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Extraoral
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Two bitewings together
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Bitewing series
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This type of film is considered a complete mouth of full mouth survey
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Bitewing
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This term refers to the head
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cephalometric
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This type of film takes a picture of the roof of a childs mouth-shows new and baby teeth
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Occlusal
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The dental feild only uses what type of film?
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Non-screen
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Name the 3 types of nonscreen films
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bitewing, periapical, occlusal
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Screens in film that change to blue light and green light
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FIlm placed within a casette
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An extraoral film that looks beyond the teeth
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Panoramic
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The purpose of a screen film is to what?
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Shorten the exposure time
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Name 3 examples of radioluscent structures
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Pulp, dentin, blood vessels
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Name 3 types of radiopaque structures
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Gold crowns, enamel, calculus, bone supporting tooth
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X-rays were discovered in what year and by who
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1895, Whilhelm Roentgen
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The first dental radiograph had an exposure time of how long
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25 min
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Name 3 reasons why Whilelem Roentgen's discovery of X-rays were noteable
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1) Many scientists had already discovered x-rays without knowing
2) Won Nobel Peace prize 3) Discovered by accident |
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This man discovered the first x-ray unit and suffered a burn to his hand while experimenting
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Dr. Rollins
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This man made the first dental radiograph by placing a glass photographic plate wrapped in black paper and rubber and put in his mouth
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Dr. Walkoff
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This man was credited for the 1st practical use of dental radiographs
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Dr. Kells
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This electrical engineer developed the first hot-cathode x-ray tube (a high vaccuum tube that had a tungsten filament) and became the prototype for all modern x-ray tubes
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William D. Coolidge
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The simplest form of matter
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Atom
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The nucleus of an atom contains what 2 things
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protons and neutrons
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This type of atom has a negative charge
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electron
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In order for an atom to be stable, what needs to happen
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protons need to equal the number of electrons
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The # of protons = the _____
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atomic number
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#Protons+#of Neutrons = what
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Atomic mass
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The binding energy of electron shells is measured in what
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Kiloelectronvolts (kev)
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The K shell holds how much (kev) kiloelectronvolts
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69.5
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Does the binding energy need to be stronger that 69.5 in the K shell to displace the shell?
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Yes
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Ionization is the loss of what
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an electron
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A neutral atoms is when __=__
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P=E
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An atom that loses an electron is called what
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Ion
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Ionization is the production of what
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A positive and negative ion
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If an atom is unstable does it always stay this way?
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No, they dont want to be unstable
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Moving from one orbit to another (being displaced not lost)
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Excitation
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Is excitation a major or minor change
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minor
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Is ionization a major or minor change
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Major
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In order for ionization to occur, there needs to be enough energy to overcome what?
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The binding energy of the electron shell
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