1974-04-05
1976-09-07
Peshock, Robert
A61C 900
Patent
active
039785858
ABSTRACT:
The impression trays of this invention include an upper impression tray having a body which is a convoluted member having an oral plate which follows the general contours of the roof of the mouth and which provides a lingual portion adjacent the upper teeth, and buccal walls which are detachably mounted to the outer rectilinear edges of the body to form a depression in which impression compound may be disposed. This invention also includes a lower impression tray having a U-shaped body, including a trough-like portion corresponding to the base of the U-shape and to the incisors of the lower row of teeth, and a pair of mounting flanges issuing from the trough-like portion as legs of the U-shape, over the lower molar areas, and detachable buccal and lingual walls forming a trough-like depression into which the impression compound may be disposed.
REFERENCES:
patent: 981476 (1911-01-01), Rowse
patent: 2426388 (1947-08-01), Chartrand
patent: 2452866 (1948-11-01), Oertel
patent: 2802269 (1957-08-01), Stern
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