Screw device for orthodontic treatment

Details Screw device for orthodontic treatment Screw device for orthodontic treatment

2007-02-06

2007-02-06

O'Connor, Cary E. (Department: 3732)

Dentistry

Orthodontics

Means to transmit or apply force to tooth

C433S174000

Reexamination Certificate

active

10885580

ABSTRACT:
A screw device for orthodontic treatment comprises a screw-body part, a platform part integrally formed with the screw-body part, and a head part. The head part is detachable from and exposed outside the screw-body part and is operatable to hook a spring (or rubber band) for orthodontic treatment. Since the head part is detachable, various types of head parts can be chosen to attach on the same platform part and screw-body part for performing different orthodontic treatments. Cost to manufacture the screw device is lower, and flexibility and convenience to use the screw device are higher. The threads of the screw-body part are divided into at least a first thread portion located near to the platform part and a second thread portion located away from the platform part. The threads of the first thread portion are designed to have relatively narrower width and smaller pitch, while the threads of the second thread portion have wider width and larger pitch.

REFERENCES:
patent: 5306142 (1994-04-01), Richards
patent: 5588838 (1996-12-01), Hansson et al.
patent: 5697779 (1997-12-01), Sachdeva et al.
patent: 6312259 (2001-11-01), Kvarnstrom et al.
patent: 2002/0182560 (2002-12-01), Park et al.

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