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radiographs are taken to benefit who?
the patient
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a diagnostic dental radiograph is one that has been properly...(3)
placed, exposed, adn processed
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exposure problems (4)
- not exposed,
- accidentally exposed to light,
- overexposed,
- underexposed
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Appearance, Cause, and correction of unexposed film
- Appearance: clear
- Cause: film not exposed due to electrical failure, malfunciton of x-ray machine, or x-ray machine not turned on
- Correction: make sure x-ray machine is on, listen for audible exposure signal
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Appearance, Cause and Correction for film exposed to light
- Appearance: black
- Cause: accidentally exposed to white light
- Correction: do not unwrap in a room with white light. check the darkroom for light leaks.
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Appearance, cause and correction for overexposed film
- Appearance: dark
- Cause: excessive exposure time, kilovoltage, or miliamperage, or a combination of factors
- correction: check exposre time, kvp, and mA settings before exposeing the film
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Appearance, cause, and correction for underexposed film
- Appearance: light
- cause: inadequate exposure time, kvp, or mA or a combination of these factors
- correction: check exposure time, kvp, adn mA settings before exposing film
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Periapical technique errors (3)
- film placement
- angulation
- beam alignment problems
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how must the edge of periapical film be placed?
parallel to the incisal or occlusal surfaces of the teeth and extend 1/8 inch beyond the inciasal or occlusal surfaces
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incorrect film placement may result from (3)
- improper placemtne of film over area of intended interest
- inadequate coverage of apical regions
- dropped film corner
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angulation problems
Vertical and horizontal
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PID alignment problems
- cone cut with film holder
- cone cut without film holder
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Technique errors with bite-wing film
- film placement
- angulation
- beam alignment problems
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Bite-wing film should show?
- Max and man. teeth
- interproximal contact areas
- crestal bone
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Where should bite-wing film be placed?
- placed over the prescribed areas
- must show occlusal plane that is postioned horizontally along the long axis of the tooth
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Where is film placed for premolar bite-wings?
front edge of the film should be aligned with the midline of the mandibular canine
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where is film placed for molar bite-wings?
postitoned so that the front edge of the film is aligned with the midline of the mandibular second premolar
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Incorrect bite-wing film placement may result in (4)
- an absence of specific teeth or tooth surfaces on a film
- a tipped occlusal plane
- overlapped interproximal contacts
- a distorted image
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Miscellaneous technique errors (6)
- film bending
- film creasing
- phalangioma
- double exposure
- patient movement
- reversed film
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images appear stretched and distorted from this error
film bending
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a thin radiolucent line appears from this error
film creasing
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The patient's finger appears on the film in this error
phalangioma
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a double image appears on the film from this error
double exposure
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blurred images appear on the film from this error
movement
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light images with a herringbone pattern appear on the film from this error
reversed film
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