A - Human Necessities – 61 – C
Patent
A - Human Necessities
61
C
83/1
A61C 7/08 (2006.01) A61C 7/14 (2006.01)
Patent
CA 1329500
Abstract An orthodontic positioner appliance of elastomer base material is formed directly on the actual tooth attachments or coupling members during the fabrication process so as to assure accuracy of the appliance and its compliance with the exact shape and placement of the attachments or coupling members. There is provided a construction model of the patient's teeth in a desired or ideal orientation, coupling members are attached to the facial and/or lingual surfaces of the teeth in the construction model, and the positioner is formed by applying positioner material to the construction model and directly to the coupling members thereby providing an exact adaptation of the positioner material to the construction model including the coupling members and providing an exact fit between the positioner material and the coupling members so as to eliminate any void or space between the coupling members and the positioner material to assure maximum purchase on the teeth but yet be easily removed by the patient. A first form of the positioner is formed by a hand lay-up or other appropriate technique providing a positioner body in the form of an elongated strip of silicone elastomer material having a length determined by the location of the coupling members and having a width initiating near the gingival line and terminating near the patient's opposing dental arch to avoid interference in occlusion, the body having a surface facing the teeth and recesses in spaced relation along the strip for snap fitting onto the coupling members, the positioner urging the patient's teeth to an exact fit between the recesses and the coupling members so as to eliminate any void or space between the coupling members and the recesses. A second form of the positioner is formed by molding such an injection molding in a manner providing a positioner body of silicone elastomer material having an arcuate shape including a trough for receiving teeth of the dental arch, the trough having walls including surfaces having recesses in spaced relation along the trough for fitting onto the coupling members, the positioner urging the patient's teeth to an exact fit between the recesses and the coupling members so as to eliminate any void or space between the coupling members and the recesses to assure maximum purchase on the teeth but yet be easily removed by the patient. In orthodontic treatment, coupling members are attached to the surfaces of the patient's teeth in a predetermined manner, only the first positioner is installed on the patient's teeth during a portion of the day when the teeth are most likely to be visible to others, and only the second positioner is installed on the patient's teeth during the remaining portion of the day when the teeth are least likely to be visible to others. The coupling members are attached to the patient's teeth using a transfer matrix formed from the construction model with coupling members attached thereto.
613204
Abbatte Gerard P.
Breads Peter R.
Warunek Stephen P.
Willison Brian D.
Great Lakes Orthodontics Ltd.
Macrae & Co.
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