Dentistry – Orthodontics – Bracket
Patent
1995-02-21
1997-04-22
Hirsch, Paul J.
Dentistry
Orthodontics
Bracket
A61C 714
Patent
active
056224940
ABSTRACT:
This invention is directed to a plastic orthodontic appliance having projecting structure extending outwardly from a bonding base. The projecting structure includes a broadened outer extremity and undercuts proximate the outer extremity which form mechanical bonds with a bonding adhesive. In one application, a plurality of appliances in the form of slotted brackets is provided for cooperating with an archwire to apply corrective forces to a patient's teeth on which the brackets are mounted. Another aspect of the invention concerns a method of making plastic orthodontic appliances suitable for mechanical bonding. The method includes molding a plastic orthodontic appliance having undeformed projecting structure and subsequently softening and compressing the outer extremity of the projecting structure to form undercuts. In a preferred embodiment, the projecting structure is a plurality of posts.
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Andreiko Craig A.
Ludwig David L.
Hirsch Paul J.
Ormco Corporation
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