Dentistry – Orthodontics – Tool
Patent
1980-03-31
1981-07-07
Mancene, Gene
Dentistry
Orthodontics
Tool
221312A, A61C 300
Patent
active
042772362
ABSTRACT:
An orthodontic instrument is provided to permit the application of arch wire retaining elastic annular ligatures to orthodontic brackets on the labial surface of the teeth of a patient. The instrument includes a disposable cartridge which is loaded with a stack of the annular elastic ligatures, and which serves as a dispenser member, a housing for receiving the cartridge, a spring-biased pusher member slidably mounted in the housing and engaging the rear ligature of the stack to push the stack toward the forward end of the cartridge, so that the forward ligature moves along an enlarged end portion of the cartridge, a plurality of push rods extending along the cartridge under the ligatures with the ends of the push rods engaging the forward ligature, and release means for moving the cartridge reciprocally with respect to the housing so that the forward ligature may be forced over the enlarged end of the cartridge by the push rods each time the instrument is operated.
REFERENCES:
patent: 3134168 (1964-05-01), Erdmann
patent: 3137932 (1964-06-01), Erdmann
patent: 3458031 (1969-07-01), Hoffman
patent: 3861045 (1975-01-01), Canter et al.
patent: 4040187 (1977-08-01), Cardena
Beecher Keith D.
Mancene Gene
Wilson John J.
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