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Dental Radiology 1

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Cheek side posterior
buccal
upper
maxillary (maxilla)
lower
mandibular (mandible)
dentition
teeth (the mouth in its entirety)
cheek side anterior
facial
biting surface of teeth
occlusal
tongue side bottom and usually top
lingual
tongue side occasionally upper
palatal
surface closest to the midline of mouth
mesial
surface furthest from the midline
distal
tip of the root
apex
caries
decay
film speed
the sensitivity of a film to radiation exposure
kilovoltage or kilovoltage peak (KVP)
the peak voltage used during the exposure (deal with wavelength, density, and color)
milliamperage (mA)
the intensity of the electrical current used during exposure (deal with time)
collimation
the restriction (piece inside machine) of the size and shape of the x-ray beam (creates the primary beam)
filtration
aluminum pieces in the machine used to absorb low-energy x-rays
film density
overall darkness or blackness of a radiograph
latent image
the invisible image on the film before processed
PID cone
circular part of x-ray machine, position indicating device
exposure time
effects the number of x-rays produced in a certain amount of time
inverse square law
the intensity of radiation is inversely proportional to the square of the distance from the source of radiation
paralleling techniques (XCP) dealing with PA's
film is placed parallel to the long axis of the tooth, the central ray is perpendicular to the long axis of the tooth and film holder
advantages of paralleling techniques
advantages-produces without dimensional distortion, easier to get the correct angle, able to recreate the exact angle again
bisecting techniques dealing with PA's
film is placed on an angle to bisect the long axis of the tooth, central ray is perpendicular to the long axis of the tooth and film holder
advantages of bisecting techniques
advantage-decreased exposure time, doesn't need to use film holder if patient's anatomy doesn't allow
disadvantages of paralleling techniques
disadvantages- film placement may cause patient discomfort
disadvantages of bisecting techniques
disadvantage-image distortion, difficult to get the proper angle, and unnecessary exposure