Ormco Corporation

Kerr Manufacturing Company

Kerr Corporation

Raymond F Wong

Farrokh Farzin-Nia

Mehdi Durali

Kevin Corcoran

Patrick D Kidd

Terry L Sterrett

Sammel Shahrier Alauddin

Xiangxu Chen

Duncan E Waller

Vahik Krikorian

James Lobsenz

Kevin Sean Corcoran

An single component light-curable orthodontic adhesive includes a curable resin monomer component; a quaternary curing initiator system; and filler. The orthodontic adhesive has a long working time (W) and short curing time (C). The adhesives are suitable as light-curing and may include a colorant. Suitable colorants include reversible, thermochromic dyes. The adhesive may also include a resin toughening component.

Orthodontic adhesives

An orthodontic adhesive includes a curable resin monomer component; a quaternary curing initiator system; and filler. Another orthodontic adhesive having a W/C ratio (working time to curing time ratio) of at least 10, 12, 14 or 20, includes a curable resin monomer component; a curing initiator system; and filler. The adhesives are suitable as light-curing and may include a colorant. Suitable colorants include reversible, thermochromic dyes. The adhesive may also include a resin toughening component.

Orthodontic appliances (brackets) having a pre-applied or factory applied adhesive thereon presenting a non-tacky surface are described. The brackets, which may be plastic, metal or ceramic, have a bonding base surface to which an appropriate adhesive composition is pre-applied. The adhesive, which is uncured and generally presents a tacky outer surface, is protected from deterioration or disturbance by the attachment or adherence of particles, which may form a layer, on the outer surface of the adhesive, thereby presenting a non-tacky surface. Also included are articles consisting of a container with a cover and an orthodontic bracket having pre-applied adhesive received in the container. The adhesive on the bracket in the container presents a non-tacky surface by virtue of a layer of particles secured to the otherwise tacky adhesive surface.

Orthodontic appliances (brackets) having pre-applied adhesive

The present invention is directed to orthodontic adhesive formulations, both light curable in the visible wavelength range, and self-curing, for use in the adherence of orthodontic appliances to the surface of etched human teeth. These formulations exhibit a high degree of surface wetting, an available source of leachable fluoride, low polymerization shrinkage, high physical properties and adhesion, and in the light curable embodiment, a post-curing capability.

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.

Plastic bracket with adhesive primer layer and methods of making

Orthodontic appliances are disclosed which have a base portion with a chemically active bonding surface and a protective porous mesh affixed to the bonding surface to prevent contamination thereof. Fabric-type mesh materials are contemplated for use as the protective film. The protective film is preferably inert to the orthodontic adhesives utilized to affix the bracket to a tooth.

Orthodontic appliance with protective porous film

In one aspect of the present invention, it is provided an orthodontic bracket having a base portion for attachment to a tooth. The base portion is provided with a substantially monolayer of substantially uniform size particles. The particles are secured to the bonding base through the use of an adhesive. In another aspect, there is provided a method of making an orthodontic bracket having a bonding base for attachment to the surface of a tooth, comprising the steps of:

Orthodontic bracket, method of making an orthodontic bracket, and method

An orthodontic appliance for attachment to a tooth having a ceramic engaging surface for attachment to the tooth. A single compliant layer having a plurality of openings is accrued to the engaging surface of the tooth. The appliance is attached to the surface of the tooth using a chemically active adhesive system.

Orthodontic bracket/mesh screen

An orthodontic bracket having a base portion for attachment to a tooth. The base portion is provided with a substantially monolayer of substantially uniform sized particles. The particles may have a size in the range of 5 to 200 micron.

Growing community of inventors

Chino Hills, CA, United States of America

Raymond F Wong