A - Human Necessities – 61 – C
Patent
A - Human Necessities
61
C
83/1
A61C 7/00 (2006.01) A61C 7/12 (2006.01)
Patent
CA 1043595
PLASTIC ORTHODONTIC BRACKET ABSTRACT OF THE DISCLOSURE An all plastic orthodontic bracket is disclosed which is adapted to be attached directly to the labial surface of a tooth. The bracket has a quasi triangular shaped body as viewed from the facial view to minimize forces being applied to the bracket during mastication and occlusion. The apical section of the triangular shaped body is adapted to be attached to the incisal section of the tooth and the base of the triangular shaped body is adapted to be attached to the gingival section of the tooth. All surfaces of the bracket body extending from a ligature undercut over the front surface of the bracket body are smooth and convex with the exception of those surfaces defined by an archwire slot and a second slot which is perpendicular to the archwire slot. Smooth and convex bracket body surfaces substantially lessen plastic fatigue commonly found in prior art plastic ortho- dontic brackets having sharp corners. The ligature undercut is of a depth which is substantially filled by a small gauge archwire or an elastic ring. The relatively shallow depth of the ligature undercut insures that maximum bracket bulk is distributed between the archwire slot and the ligature undercut to lessen the tendency for bracket body fatigue between these points.
226217
Fischer Kenneth J.
Orlowski Jan A.
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