Orthodontic expansion screw

Details Orthodontic expansion screw Orthodontic expansion screw

1978-03-20

1982-08-31

Mancene, Gene

Dentistry

Orthodontics

By device having means to apply outwardly directed force

A61C 700

Patent

active

043470548

ABSTRACT:
An orthodontic expansion screw is provided having two screw bodies which are displaceable relative to each other by a screw spindle. A guide pin disposed parallel to the spindle is attached to an attachment section of one of the screw bodies and engages a guide bore of the second screw. The screw spindle has threaded sections of counter-rotating threads which engage threaded bores in the screw bodies; such opposed sections extend from an actuating section to which attached. The second screw body has a guide portion which extends from the second screw body portion. The first screw body has a threaded body portion extending from the attachment section whereby maximum separation of the screw bodies is permitted by virtue of the extended threaded bore.

REFERENCES:
patent: 3800420 (1974-04-01), Quaknine
patent: 3832778 (1974-09-01), Wallshein
patent: 3835540 (1974-09-01), Biederman
patent: 3921294 (1975-11-01), Wallshein
patent: 4026023 (1977-05-01), Fisher
patent: 4107843 (1978-08-01), Spino et al.
Dental Labor, German periodical, 7-1972, pp. 27-31.

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