Plastic bracket with adhesive primer layer and methods of making

Details Plastic bracket with adhesive primer layer and methods of making Plastic bracket with adhesive primer layer and methods of making

1992-09-04

1994-03-22

Wilson, John J.

Dentistry

Orthodontics

Bracket

A61C 300

Patent

active

052958248

ABSTRACT:
Plastic orthodontic brackets having an adherent acrylic adhesive primer layer on the bonding surface thereof are disclosed, as well as methods of making such brackets. Primed plastic orthodontic brackets which are shelf-stable and which obviate the need for the chairside primers commonly used by clinicians are contemplated. In a method of the present invention, a solvating mixture of solvents and acrylic monomers is applied to the bonding surface of a plastic bracket and allowed to attack (solvate) and diffuse into the plastic substrate. Thereafter the bracket is heated to volatilize the solvents and lower molecular weight monomers to thereby leave a coating or layer of acrylic material which is predominantly monomeric and is at least partially embedded in the plastic bracket. This coating acts as a primer for acrylic cements and enhances the bonding between the plastic orthodontic bracket and the tooth surface to which it is applied using acrylic adhesive cements which are themselves well known in the art.

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M. N. Coreil et al., "Shear Bond Strength of Four Orthodontic Bonding Systems", pp. 126-129.

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