The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 10, 1995
Filed:
Mar. 17, 1992
G Herbert Hanson, Hamilton, CA;
Hamilton Ortho Inc., Hamilton, CA;
Abstract
An arch wire of T-shape cross section in the gingival occlusal transverse plane so as to have a labial lingual extending foot and a gingival occlusal extending crossbar is operative with a bracket having a mesial distal extending arch wire slot. The crossbar is urged against the bracket body by a ligature, usually an elastic ligation loop, until its lingual surfaces, which preferably are flat and coplanar, are in full butting engagement with the slot bordering portions of the bracket labial surface, which preferably are also flat and coplanar. At this time the foot is fully inserted in the slot and the optimum relative position and attitude of the bracket and the wire is determined for both tipping and rotation by this butting engagement. The function of the foot is primarily to guide the wire into this engagement and it can therefore fit with good clearance in the slot. The wire is usually used toward the end of the procedure after initial corrections and movements have been produced using round cross section wires. This replaces the prior art system of square or rectangular wires fitting in a rectangular slot. The labial slot surface is concave, usually semi-circular, so that it cooperates effectively with the round cross section wires used in the initial stages.