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30 Cards in this Set
- Front
- Back
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The person who discovered x-rays while working with cathode ray tubes was: a. W.J. Morton b. W.H. Rollins c. Wilhelm Roentgen d. F. Gordon Fitzgerald |
c. Wilhelm Roentgen |
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Of the following uses of dental radiographs, which is the primary benefit to the patient?
a. Detection b. Confirmation c. Localization d. Documentation of change |
a. Detection |
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Which film size is also called the narrow anterior film?
a. size 0 b. size 1 c. size 2 d. size 3 e. size 4 |
b. size 1 |
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The number of BWX films necessary, is based on which of the following?
a. The curvature of the arch b. The number of teeth present in the posterior areas c. The size of the film used d. All of the above e. A and B only |
d. All of the above |
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Which component of the x-ray film provides a stable support for the emulsion? a. Film base b. Adhesive layer c. Gelatin d. Halide crystals |
a. Film base |
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The latent image is stored by the _______ in the dental x-ray film.
a. Gelatin b. Film base c. Adhesive layer d. Silver halide crystals |
D. Silver halide crystals
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Which of the following statements about duplicating film is false? a. It is not exposed to x-rays b. It may be placed intraorally or extraorally c. It is used in the darkroom d. It is used to make copies of radiographs |
b. It may be placed intraorally or extraorally |
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Which of the following is the correct sequence of film composition - from external to internal?
a. Protective layer, film emulsion, adhesive layer, film base b. Film base, film emulsion, adhesive layer, protective layer c. Protective layer, film base, adhesive layer, film emulsion d. Protective layer, adhesive layer, film emulsion, film base |
a. Protective layer, film emulsion, adhesive layer, film base |
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The tube side of the dental film packet:
a. Has the flap used to open the dental film b. Is solid white c. Should face the patient's face d. Is color coded |
B. Is solid white
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The purpose of __________ is to chemically reduce the exposed, energized silver halide crystals into black metallic silver.
a. Developer b. Fixer c. Rinsing d. Washing |
A. Developer
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Where is the BEST place a box of OPENED extraoral films be stored?
a. In a well ventilated area b. Outside the darkroom c. In the darkroom d. None of the above |
C. In the darkroom
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What is the function of the gelatin in the film emulsion?
a. Suspends the silver halide crystals on the film base b. Helps absorb the fixing solution c. Absorbs radiation, allowing it to come into contact with the silver halide crystals d. Provides the stable support for the film |
a. Suspends the silver halide crystals on the film base |
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Which of the following components is the same in both the developer and the fixer?
a. Acidifier b. Hardening agent c. Accelerator d. Preservative |
D. Preservative
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Which of the following film packet layers protects the film from the back-scatter radiation?
a. Paper film wrapper b. Lead foil sheet c. Outer package wrapper d. None of the above |
B. Lead foil sheet
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The aggregates of ___________ that make up the latent image center in the crystal.
a. Film emulsion b. Bromine atoms c. Neutral silver atoms d. Gelatin |
C. Neutral silver atoms
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Which of the following conditions contribute to faster film speed?
a. Double sided emulsion b. The presence of radiosensitive dyes c. Larger silver halide crystals d. All of the above |
D. All of the above
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The film emulsion is hardened during?
a. Development b. Fixation c. Drying d. Washing |
B. Fixation
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Reticulation of the film is most commonly caused by:
a. Static electricity b. Extreme temperature changes c. Insufficient fixing time d. Air bubbles |
B. Extreme temperature changes
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The central ray of the beam should be directed perpendicular to the curve of the arch and through the contacts to help avoid?
a. Cone cuts b. Elongation c. Overlap d. Foreshortening |
C. Overlap
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#1 Foreshortening is caused by excessive vertical angulation. #2 Elongation is caused by excessive vertical angulation.
a. Both statements are true b. Both statements are false c. Statement #1 is true and statement 2 false d. Statement #1 is false and statement 2 true |
c. Statement #1 is true and statement 2 false |
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During processing, unexposed silver halide crystals are removed from the film emulsion by which of the following? a. Elon b. Hydroquinone c. Sodium thiosulfate d. Potassium bromide e. Sodium carbonate |
C. Sodium thiosulfate
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Which of the following solutions is responsible for softening the emulsion during processing?
a. Acetic acid b. Sodium carbonate c. Sodium thiosulfate d. Sodium sulfite |
B. Sodium carbonate
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An unexposed radiograph will appear:
a. Completely clear b. Completely dark c. Partially dark (fogged) d. None of the above |
A. Completely clear
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With ____________, images appear stretched and distorted.
a. Film creasing b. Film bending c. Tubehead movement d. Patient movement |
B. Film bending
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The fixing agent is commonly called?
a. Clearing agent b. Gelatin agent c. Neutralizing agent d. Preservative |
A. Clearing agent
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True or False
It is necessary to maintain an adequate distance of 4ft. or more and not exceed 2-3 min. under safelight illumination when unwrapping x-ray film for developing. |
True |
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Which of the following is the largest intra-oral film? a. Size 4 b. Size 3 c. Size 2 d. Size 1 |
A. Size 4
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The first step in manual film processing is?
a. Development b. Rinsing c. Fixation d. Washing e. Drying |
A. Development
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An interproximal examination is ________?
a. called a bitewing x-ray b. Used to examine in-between teeth and crestal bone c. Both A and B d. None of the above |
C. Both A and B
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A periapical examination is used to examine the ________. a. Interproximal areas b. Apex of the tooth only c. The entire tooth d. The crown of the tooth |
C. The entire tooth |
