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29 Cards in this Set
- Front
- Back
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Which increases sensitivity of the radiographic film?
a. increased gel thickness b. sulfer particles c. decreased surface area of the silver bromide d. metallic silver particles e. b & d |
E
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The film layer that contains the silver halide crystals is
a. the base b. protective layer c. emulsion d. top coat e. adhesive |
C
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Maxillary left molar periapical is taken and mounted correctly the embossed dot should appear in the _________ corner of the film.
a. upper right b. lower right c. upper left d. lower left |
B
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Increasing the temperature of the developing solution
a. will produce a lighter radiograph b. dissolve the emulsion c. require decrease in the developing time d. will not change quality of the film e. make the film more brittle |
C
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You have a new patient who is 55 years old. He has extensive restorations and complains of pain in the right maxillary area. What radiographs should we take?
a. FMRS b. Bitewings c. Bitewings and selected periapicles d. Periapicals in the area of the pain e. Do a complete medical history and oral exam and then decide |
E
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Tungsten is an excellent element for generating x-rays because
a. tiny atoms on many tightly held valence electrons b. its melting point is arond 1500 degrees Celcius c. has a large nucleus d. has a high vapor pressure e. none of the above |
C
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During the process of fixation
a. the silver bromide crystals are oxidized b. unexposed silver bromide crystals are dissolved c. bromide ions precipitate forming potassium bromide d. the silver accumlates around sensitivity specks |
B
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Which electrons have the greatest binding energy to the nucleus?
a. J shell electrons b. M shell c. L shell d. Q shell |
C
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If you increase the mAmp from 5-15, which of the following
a. the number of electrons will be tripled b. the mean energy level of the x-ray will be increased c. the image will be sharper d. the number of electrons getting to the film will not change e. the image will be lighter |
A
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Which of the following is not characteristic of dental x-rays?
a. they are photons of energy b. they travel below the speed of light c. their wavelength is 0.1-0.001 nm d. their energy level ranges from 34-60 keV |
E
unsure of answer C |
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You are seeing a patient who is 22 years old who has been to a dentist for several years. A FMRS was taken at the last visit. You see several open margins and old amalgam restorations and discoloration of the enamel. The patient has fair oral hygien. What radiographs should be taken?
a. FMRS b. Selected PA's c. 4 Bitewings d. 2 Bitewings e. No radiographs because you will replace the amalgams |
C
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Which of the following is not electromagnetic radiation?
a. microwaves b. UV light c. Cosmic rays d. Alpha particles e. Infared light |
D
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Which of the following statements is incorrect?
a. the key interproximal space for PR bitewing is between the 1st & 2nd PM b. the last erupted teeth should be represented full clinical crown for a BW, and full tooth for PA c. the key interproximal space for a molar PA is between the 1st & 2nd molar d. the embossed dot should always be placed into the slot of the film holder e. never bend the film |
A
D? |
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A beta particle is
a. 2 protons b. 2 protons & 2 neutrons c. 2 electons d. 1 election e. 1 electron & 1 neutron |
D
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Which is not a characteristic of an x-ray photon?
a. travels in a wavelike motion b. travels at 186,000 m/s in a vacuum c. causes ionization in matter d. has mass equal to its density |
D?
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The number of electrons generated in an x-ray is determined by
a. the kilovoltage used b. the distance between the filament and target c. the mAmp used d. the size of the focusing cup e. the step up transformer |
C
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Which of the following will affect the mean energy level of the beam?
a. increasing the time b. holding down the button longer c. increasing the kVP setting d. decreasing the size of the effective focal spot e. decreasing the time |
C
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Radiopaque tissues
a. little of the x-rays b. absorbs x-rays more fully c. are hollow regions d. are cysts e. none of the above |
B
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What is the order for taking radiographs?
1. put on gloves 2. wash your hands 3. place plastic blue covers on surfaces you will touch 4. put on a mask 5. place lead apron on patient a. 1,3,5,2,4 b. 5,4,2,1,3 c. 2,5,3,4,1, d. 3,5,2,4,1 e. 1,4,3,5,2 |
D
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What percentage of electrons are converted to x-ray at the anode?
a. 1% b. 2% c. 10% d. 45% e. 99% |
A?
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Drawing from the information you have learned in radiology, if you were to have a child in the chair, what change would you have?
a. increase kVp b. decrease exposure time c. increase mA d. no change is necessary e. ask an upperclassman |
B
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How many electrons does Tungsten have in its M orbit?
a. 36 b. 27 c. 18 d. 9 e. 64 |
C?
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How many premolar radiographs are in a FMRS?
a. 6 b. 8 c. 4 d. 0 e. 2 |
A
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Energy in the form of photons or quanta, has no mass and travels at the speed of light?
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Electromagnetic radiation.
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At high speed he electron approaches the nucleus of an atom and begins to slow down and thus releasing energy. Energy released is proportional to how close the electron passes to the nucleus.
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Bremsstrahlung interactions.
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A radiographic term labeling the cortical bone surrounding the root of the tooth forming the socket.
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Lamina Dura
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When a high speed electron collides with an orbital election the orbital electron is displaced. An electron from a higher orbital will drop down to fill in the vacancy and in doing so releases the energy characteristic for that orbital change.
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Characteristic radiation
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This is the approved method for taking radiographs. The film, object and cone are alligned parallel to each other.
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Paralleling technique
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The release of electron from the filament by heating the filament.
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Thermoionic emission
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