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37 Cards in this Set
- Front
- Back
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_____________shows a type of occlusal radiographic technique that shows a large area, although image may be distorted
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Topographic projection
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One Use of topographic include
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a supplementary radiographic technique used in conjunction w/bwx and periapicals
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Also used when ______areas of the mand. and max. must be ___________
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large
visulized |
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Preferred when area of intrest is larger than__________or when placement of periapical film is too__________for patient
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periapical film
difficult |
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Topographic is used to locate _____and_________ in the buccolingual dimensions
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objects
pathological(diseases)conditions |
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Right angle or cross sectional projections: the central ray is directed at ___________to film
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90 degrees
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Right angle or cross sectional are used for localizing in__________dimensions
EXample gives 3rd dimension of impacted molars |
buccolingual
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Topographic angulation varies from________to________
Used for large___________areas |
45-75
pathological |
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Topograpic:
Film is placed with _________side facing the________to be exposed |
white
arch |
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Topographic:
The film is placed in the mouth between the________ ______of the mand and max teeth |
occlusal surfaces
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The film is stabilized when patient__________on film
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bites down
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Patient prep before topographic:there are 5
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explain radiographic procedure
postion patient upright adjust headrest to support head lead apron w/thyroid collar remove all objects from mouth |
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Equipment prep: there are 3
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Set exposure factors on xray unit according to recommendationsof film manufacturer
Either a short (8in)or long (16in)PID maybe used w/occlusal technique Maxillary right angle occlusal film PID is at 90 degree angle |
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Max Right angle is used to visualize
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palate
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Max. Topographic occlusal projection, central ray is directed at ___to_______ to___________
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50-60
bride of nose |
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Max Occlusal topographic projection is used to visulize the________and the__________on maxilla
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palate
anterior teeth |
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Posterior Topographic occlusal projection, The point of entry corresponds to the __________of the ________and vertical angulation is about__________
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apices
premolars 55 degrees |
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Mand Right angle projection is used to examine the_________and______aspects of mand
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buccal
lingual |
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Mand right angle is also used to locate ____________or_____________in the floor of mouth
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foreign bodies
salivary stones |
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Mand Topographic occlusal projection used to examine the ___________of mand
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anterior teeth
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Extra oral projections
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a radiograph placed outside the mouth during xray exposure
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Extra Oral is used if patient cannot
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open his mouth to place film packet intraorally
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Extra oral is also used to _________areas of_________or_______
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enlarge
skull jaw |
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Film screen combinations give_______detail than intraoral
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less
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Extral oral is useful in diagnosing ________or_________
useful in diagnosing large items |
caries
periodontal bone loss |
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You want to take ________if there is bone loss
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vertically
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Intensyifying screens:there are 4
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Requires fewer xrays to expose film
Active ingredients are xray absorbing crystals called phosphors Loss of image detail must be careful with screens,not to be scratched or damage them |
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Extra oral is _________sensitive than intraoral
Processed the same as intraoral but must be careful of________ |
more
safelight |
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Digital radiography,
used to record radiograpghic images. No______________ Uses an___________and______________that produces xray images almost instantly on a computer monitor |
No film or processing chemistry used
Uses an electronic sensor and computerized imaging system |
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A method used in capturing radiographic image using sensor is placing it
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a sensor placed in mouth
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Radiation exposure on digital
Typical sensor is ________sensitvie to xrays then conventional film |
more
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Exposure times are ________to_______% less than that required for controversial radiography using E speed film
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50-80
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An __________ _______is a small detector that is placed in mouth of patient and used to capture radiograpic image
Note there is wired and wireless |
Intraoral sensor
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Direct Digital Imaging components include___________,____________,_____________
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xray machine
intraoral sensor computer monitor |
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Digital advantages
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Images produced in seconds
acceptable resolution Lower radiation dose No chemical process pateint understands easy storage/retrieval images can be pritned |
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Digital disadvantages
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Costly 10-15,000
Unknown life span Cannot be sterilized discomfort to patient rigid |
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Storage phosphor image is another type of digital system it is a wireless digital.
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reuseable imaging plate coated w/phosphors
can be used instead of sensor |
