Dental radiographic apparatus for photographing entire jaws
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United States of America Patent
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Sep 4, 1990
Issued Date -
N/A
app pub date -
Jun 5, 1989
filing date -
Nov 12, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A dental radiographic apparatus for photographing the entire jaws in which the apparatus includes a rotary arm having an X-ray source at one end and an X-ray film cassette at the other end thereof and operating in the manner that a path of movement of X-ray beam with respect to the dental arch describes a symmetrically extending approximately triangular envelope projecting toward the front tooth region of the dental arch by sequentially shifting the center of rotation of the X-ray beam irradiated from the X-ray source upon the X-ray film cassette, the apparatus being characterized in that it comprises a means for changing the straight-line distance on the medial line of the human body between the apex and receding points of limit of the envelope.
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