Plastic orthodontic appliance, plastic appliance mechanical bond

Details Plastic orthodontic appliance, plastic appliance mechanical bond Plastic orthodontic appliance, plastic appliance mechanical bond

1997-05-20

1998-11-03

Hirsch, Paul J.

Dentistry

Orthodontics

Bracket

433 8, A61C 716

Patent

active

058299734

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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