X-ray or gamma ray systems or devices – Photographic detector support – Dental
Patent
1989-11-16
1991-06-04
Westin, Edward P.
X-ray or gamma ray systems or devices
Photographic detector support
Dental
378169, 378173, 378187, A61B 614, G03B 4202, G03B 4204
Patent
active
050220659
ABSTRACT:
This invention relates to an x-ray film holder for intra-oral photographing, comprising a holder head (2) with three slots (10, 11, 12) intended to hold films in different positions and to be inserted in the mouth-cavity of the patient with a film in any of the said slots, and a handle (1) comprising at least a substantially flat bite portion, so that the occlusion plane will be lying on each side of said flat portion. The three slots in the holder head consist of a first slot (10) for a lying film (FIG. 2A) for so called bite-wing exposure, where crowns as well as the border portion of the bone in one of both the jaws are visible on the developed picture, a second slot (11) for an upraised film (FIG. 2B) for so called upraised bite-wing exposure, where crowns as well as the border portion of the bone in both the jaws are visible on the developed picture, and a third slot (12) for so called apical pictures (FIG. 2C) where crown as well as root- and jaw-bone is visible on the developed picture but nothing of the other jaw.
REFERENCES:
patent: 2786947 (1957-03-01), Lieberman
patent: 3356845 (1967-12-01), Bergendal
patent: 3777141 (1973-12-01), Eggen
patent: 4251732 (1981-02-01), Fried
patent: 4295050 (1981-10-01), Linden
Westin Edward P.
Wong Don
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