Dentsply Research & Development Corp.

Dentsply International Inc.

Dentsply Sirona Inc.

Ceramco Inc.

Paul D Hammesfahr

Kewang Lu

Xiaoming Jin

Chin-Teh Huang

Steven R Jefferies

Paul A Silver

Mingxin Fan

Paul Richard Pierson

John Charles Subelka

Junjie Jeffrey Sang

Gordon Brian Blackwell

Robert V Hare

Richard E Welsh

Xiuling Wang

Thomas V Kopunek

Pamela H Hare

Donald A Kapperman

John C Subelka

Paul Stephen Danielson

Ronald L Sitzema, Jr

Bernard Koltisko

Huaibing Liu

Douglas D Bennett

Qizhou Dai

Michael T O'Connor

Earl C Francis

Louis Bertrand

Gregory Pomrink

Robert C Campbell

Carolyn M Kramer Primus

Mike O'CONNOR

Jin Xiaoming

A photopolymerization accelerator composition improving color stability and controlling polymerization shrinkage stress of cured resin and/or the resulting composite paste thereby feature by tertiary twisted biphenyldiamine with the general formula I: R2 and R3 are each independently alkyl having from 1 to 5 carbon atoms; R and R1 are each independently hydrogen or halogen; alkyl, alkoxy, or alkylthio having from 1 to 18 carbon atoms; or phenyl and/or substituted phenyl alkoxy, or alkylthio having from 1 to 18 carbon atoms. It can be used in part with conventional photosensitizers and radically polymerizable monomers.

Photopolymerizable compositions featuring novel amine accelerator for improved color stability and reduced polymerization stress thereby

A photopolymerization accelerator composition improving color stability and controlling polymerization shrinkage stress of cured resin and/or the resulting composite paste thereby feature by tertiary twisted biphenyldiamine with the general formula I: R2 and R3 are each independently alkyl having from 1 to 5 carbon atoms; R and R1 are each independently hydrogen or halogen; alkyl alkoxy, or alkylthio having from 1 to 18 carbon atoms; or phenyl and/or substituted phenyl alkoxy, or alkylthio having from 1 to 18 carbon atoms. It can be used in part with conventional photosensitizers and radically polymerizable monomers.

A dental adhesive composition has an adhesive component and an activator component. The adhesive composition has a volatile organic solvent component, one or more polymerizable (meth)acrylate compounds optionally containing fillers, and a polymerization photoinitiator. The adhesive component may also be a substantially homogeneous mixture of one or more polymerizable (meth)acrylate compounds and an effective amount of a photoinitiator, without a solvent. The activator component includes an aromatic sulfinate salt and an activator component solvent. A method for adhering a restorative to a dental surface includes preparing the surface for restoration; applying a mixture of an adhesive component and an activator component to the prepared cavity, thereby forming a coated cavity surface; and, applying a direct or indirect dental restorative to the coated cavity surface.

Method and composition for adhering to tooth structure

A photopolymerizable and photocleavable (P&P) resin monomer is derived from a reactive photoresponsible moiety via various linkages to form photopolymerizable monomers and/or oligomers.

Low stress flowable dental compositions

Photopolymerizable and photocleavable resins and low shrink and low stress composite compositions

Disclosed herein are low viscosity and low stress dental compositions comprising at least one low stress polymerizable resin and at least one filler. The dental compositions described herein have high depth of cure and self-leveling characteristics and are capable of bulk application.

Low stress flowable dental composition

A self curing activator for chemical polymerization of the interface of a dental bonding agent and a self curing or dual curing dental cement or restorative, includes an aryl borate compound, a polymerizable monomer, an optional acidic compound, an amine compound which exhibits a catalytic action, an organic peroxide containing material, and a metal compound wherein said metal compound promotes the decomposition of the organic peroxide.

Self-cure activator

A composition of macrocyclic oligomer with at least one polymerizable group, (meth)acrylate, for example.

Radical polymerizable macrocyclic resin compositions with low polymerization stress

A container enclosing an applicator and a dental composition including a volatile organic solvent. The container is sealed. The volatile organic solvent is effectively retained within the container, even after storage at about 43&#xb0; C. for one week. Preferably the container is made of a copolymer of a cycloolefin and an open chain olefin.

Packaged dental composition

A composition of macrocyclic oligomer with at least one (meth)acrylate polymerizable group. A method includes preparing an activated precursor of an oligomer at pseudo high-dilution conditions. A method also includes preparing an activated precursor of an oligomer by reacting the precursor with an activated coupling agent, wherein the precursor is condensable and polymerizable.

A photopolymerizable material is exposed to light to effect curing. A portion of the material is exposed to light in a conventional manner, while at least one other portion of the material is masked from direct exposure to the light by use of a mask ( ) having at least one mask segment ( ) which either completely or at least partially blocks the light. In this manner, the polymerization stress associated with the cured materials is limited or minimized due to extended molecular relaxation promoted by this controlled or hybrid curing technique. Also according to the invention, different segments ( ) of a material to be cured ( ) are exposed to different wavelengths of light energy ( ) or one such segment ( ) is exposed to light energy while another such segment is not.

Reducing polymerization stress by controlled segmental curing

A dental composite material includes a hardenable resin matrix and a filler component. The filler component includes (a) a first plurality of preferably glass particles having an average particle size of from about 1 to about 10 micrometers; (b) a second plurality of preferably glass particles having an average particle size of from about 0.1 to about 1 micrometers; and, (c) a plurality of filler particles having an average particle size of from about 0.01 to about 0.04 micrometers. A method according to the invention includes compacting a dental composite material into a prepared tooth cavity, wherein the material has a packability index above about 300 g/mm .

Dental composite restorative material and method of restoring a tooth

A multi-component, mixing, storage and dispensing package ( ) has a housing a displaceable cavity block ( ) having at least one cavity ( ) therein. A vent spike block ( ) having at least one spike ( ) held in an opposing relation to at least one cavity ( ) is provided within the housing ( ). When cavity block ( ) is caused to move toward the vent spike block ( ) spike ( ) is caused to enter a cavity ( ). A vent ( ) is in fluid communication through the spike ( ) with a mix channel ( ) and a mixing and dispensing tip ( ).

Multi-component mixing storage and dispensing device

The invention provides dental cement compositions and methods of using them for binding hard tooth material, metal and ceramic. The cement compositions include shelf stable complexes of ethylenically unsaturated monomers reacted with cations. The cements have superior adhesion to tooth without separately acid etching dentin or enamel. Compositions of are useful as dental luting cements, liners, pit and fissure seal bases and restoratives.

Growing community of inventors

Wyoming, DE, United States of America

Paul D Hammesfahr