Dentistry – Orthodontics – Means to transmit or apply force to tooth
Reexamination Certificate
2006-09-05
2006-09-05
O'Connor, Cary E. (Department: 3732)
Dentistry
Orthodontics
Means to transmit or apply force to tooth
C433S174000
Reexamination Certificate
active
07101177
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 screw device further comprises a detachable auxiliary unit which can be firmly clamped between the head part and platform part. The auxiliary unit has a hollow ring portion having a center hole, a first accessory member and a second accessory member. The size of the center hole is smaller than a flat cap of head part, such that it can be clamped between the head part and platform part.
REFERENCES:
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: 2001/0005575 (2001-06-01), Kanomi et al.
patent: 2002/0182560 (2002-12-01), Park et al.
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