Dentistry – Orthodontics – Bracket
Reexamination Certificate
2007-04-17
2007-04-17
Wilson, John J (Department: 3732)
Dentistry
Orthodontics
Bracket
C433S011000
Reexamination Certificate
active
11484578
ABSTRACT:
An orthodontic bracket or convertible buccal tube for use with arch wires has the usual mesial distal extending slot having one side open to receive the wire. The open side is closed by a shutter pivoting on a pivot pin, or coaxial pins, about a mesial distal axis, the shutter being latched in slot closed position to retain the arch wire in the slot. The device includes an attitude controlling spring member consisting of an integral extension of the part of the shutter member that closes the slot, the extension being thinner and therefore of greater flexibility than the relatively rigid shutter member. The extension can be progressively thinner that the shutter member from its junction therewith to a free end that engages the arch wire in the slot. In slot closed position a portion of the integral extension is positively engaged with a surface of the device body so as to preload the spring. Also in slot closed position the integral extension is engaged by lateral walls of the device body parallel to an occlusal, gingival, labial, lingual plane to protect it against mesial or distal directed stresses applied thereto.
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patent: 2002/0034715 (2002-03-01), Hanson
Augusta Developments Inc.
Rogers Stanley J.
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