Dentistry – Orthodontics – Means to transmit or apply force to tooth
Reexamination Certificate
2007-07-17
2007-07-17
Wilson, John J (Department: 3732)
Dentistry
Orthodontics
Means to transmit or apply force to tooth
Reexamination Certificate
active
11028698
ABSTRACT:
A torqued archwire for use in an edgewise orthodontic bracket system. The archwire is substantially rectangular in cross-section, is made of titanium-based alloy and has a plurality of segments, including an anterior segment which is sized to cooperate with brackets attached to a person's central and lateral teeth. Positive torque is built into this anterior segment, with substantially the same positive torque being used across the entire length of the segment. Extending from the respective ends of the anterior segment are a pair of transition segments, in which the torque built into the archwire is approximately zero. Posterior segments of the archwire, which extend distally from the transition segments, each have a negative built-in torque, with substantially the same negative torque being used across the entire lengths of these segments. For ease of reference by an orthodontist, the “active” anterior segment of the archwire is laser etched or colored with non-toxic ink.
REFERENCES:
patent: 2566414 (1951-09-01), Henry
patent: 4037324 (1977-07-01), Andreasen
patent: 4818226 (1989-04-01), Berendt et al.
patent: 5017133 (1991-05-01), Miura
patent: 5137446 (1992-08-01), Yamauchi et al.
patent: 5259760 (1993-11-01), Orikasa
patent: 5464347 (1995-11-01), Allesee
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patent: 6036489 (2000-03-01), Brosius
patent: 6736637 (2004-05-01), Bond
Highland Metals brochure which has entries on high torque NiTi arches (date uncertain, but prior to Feb. 28, 1994).
3M Unitek Catalog No. 16-851 9312, p. 5-13 which has entries on permachrome Henry Ideal Arches and permachrome Pretorqued, Preformed Edgewise Archwires (date uncertain, but believed to be Dec. 1993 due to “9312” designator in catalog number).
TP Orthodontics, Inc. 1995 Catalog, p. 85 which has an entry on stainless steel pretorqued archwire.
Ortho Specialties website page on S.E.T. Anterior Pre-Torqued Nickel Titanium Archwires (date uncertain, but prior to Jan. 4, 2004).
Materials from Wonder Wire regarding its Dual-Dimension Arches (date uncertain, but earliest fax header dated Apr. 22, 1995).
Leydig , Voit & Mayer, Ltd.
Wilson John J
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