Patent ID: 9554876
Date: 2017-01-31
CPC Classifications: A61C,Y10T

Claim:
1. A rectangular orthodontic arch wire appliance comprising: a connecting wire having a circular cross-section; and individual blocks having a cross-section configured to engage with an orthodontic bracket and having a through hole extending from a first side surface to a second side surface to insert the connecting wire, a top side surface, a bottom side surface, a front side surface, and a rear side surface extending between the first side surface and the second side surface, the through hole extending in a longitudinal direction, wherein the individual blocks can be fixed to the connecting wire in advance by inserting the connecting wire into the individual blocks, each of the individual blocks is contacted with neighboring individual blocks, an inner diameter of the through hole is maximum at both the first side surface and the second side surface and the inner diameter becomes gradually smaller toward a center of the through hole so that the connecting wire can be warped in the through hole when the connecting wire is bent, and a width of each of the individual blocks is maximum at a center in the longitudinal direction of the individual blocks and narrower at the front side surface or the rear side surface by chamfering corners of both the front side surface and the rear side surface of the individual blocks so that two neighboring individual blocks do not interfere with each other when the connecting wire is inserted into the individual blocks and the connecting wire is bent along a dental arch.