Bausch-lomb Incorporated

Dentsply Sirona Inc.

Dentsply International Inc.

Heliogenesis, Inc.

Daniel M Ammon, Jr

Joseph C Salamone

Vincent Shotton

Paul L Valint, Jr

Joseph A McGee

Jay Friedrich Kunzler

Derek A Schorzman

George L Grobe, Iii

Michael G Gartley

Jeffrey George Linhardt

Benjamin Jiemin Sun

Kevin L Wilkinson

Todd Patrick Berger

Daniel J Hook

Yu-Chin Lai

Richard M Ozark

Naim Karazivan

Gary D Friends

Zhenze Hu

Md Abu Hasan

Jay F Künzler

Randall Maxwell

Roya Nicole Borazjani

Yong Gao

Adam Barantz

Ravi Sharma

Robert B Steffen

Erning Xia

Xiaoming Jin

David Paul Vanderbilt

Edmond T Quinn

Jennifer Marie Hunt

Bernard Koltisko

Ivan M Nuñez

Lynn Coullard

Analuz Mark

Slawomir Banasiak

Adam Zachary Baratz

Michael J Moorehead

Alyce K Dobie

Christopher Chu

Robert M Braun

Vicky Nemzer

Christopher Damien

Wenyan Yan

Deborah McGrath

The invention relates to methods for preparing a three-dimensional digital model of a prosthetic denture base for fabrication using a light-based three-dimensional printing apparatus. A virtual reference model of a prosthetic denture base is prepared and manipulated to establish specific spatial orientation and angular inclination with respect to the build platform surface of the printing apparatus. Methods may include performing a corrective digital scaling process on the virtual reference model in order to achieve further improvements to dimensional accuracy in the fabrication of prosthetic denture bases.

Methods of three-dimensional printing for fabricating a dental appliance

The invention is related to a shaded porcelain system that contains two types of veneering porcelains: natural enamel/dentin body and opal enamel, as well as stain & glaze porcelain, with CTE that are compatible to and which can be used for veneering a dental prosthesis made of 1) lithium disilicate-based glass-ceramic substructure that is formed by hot pressing or CAD/CAM machined process or 2) YTZP zirconia-based ceramic substructure that is formed by CAD/CAM machined process in order to improve overall esthetics of final prosthesis.

Shade-coordinated, veneering porcelain system for dental prostheses

A three-dimensional printed dental device formed from rapid prototyping with printable polymerizable materials, the dental device comprising a polymeric composition, wherein the polymeric composition, after curing, has at least one property of flexural strength, flexural modulus, fracture toughness, and work of fracture that is at least 20% greater in measured value at 37&#xb0; C. in comparison to measured value at 23&#xb0; C.

Three dimensional fabricating material systems and methods for producing layered dental products

A rotatable endodontic file for cleaning/shaping a tooth root canal that includes an elongated shaft having a proximal end portion, a distal end and a tapered working portion having a rotational axis, the working portion extending from the proximal portion to the distal end; the external surface of the shaft working portion having a plurality of parallelogram-shaped cross sections along the working portion.

Endodontic instruments

An ophthalmic device is disclosed that is a polymerization product of a monomeric mixture comprising: (a) a major amount of one or more non-silicone-containing hydrophilic monomers; (b) a crosslinking agent mixture comprising (i) one or more first crosslinking agents containing at least two ethylenically unsaturated reactive end groups, wherein the at least two ethylenically unsaturated reactive end groups are (meth)acrylate-containing reactive end groups and (ii) one or more second crosslinking agents containing at least two ethylenically unsaturated reactive end groups wherein at least one of the ethylenically unsaturated reactive end groups is a non-(meth)acrylate reactive end group, and (c) one or more hydrophilic polymers or copolymers comprising one or more hydrophilic units and a thio carbonyl thio fragment of a reversible addition fragmentation chain transfer ('RAFT') agent wherein the ophthalmic device has an equilibrium water content of at least about 45 weight percent.

Ophthalmic devices

This invention designs and builds multiple layers (two layers or more) of millable dental blocks or disks for milling of various dental devices, specifically denture base blocks or disks of denture base material, where milled teeth cavities to receive artificial denture tooth materials to form final dental devices, such as partial and full dentures. This invention also designs and builds multiple layers (two layers or more) of millable denture base or denture blocks or disks comprised of denture base or/and denture tooth materials to form final dental devices, such as partial and full dentures. A method for manufacturing a layered denture is provided. The invention provides a multiple layered denture base block (or disk) for milling a denture base. The invention also provides a multiple layered denture block (or disk) for milling a denture. Highly shape adjustable or shape memory polymer layer(s) may be used in these multiple layered forms. Different layer of material has different mechanical and physical properties to meet different need, which provide added benefits to the patients, dental professional and dental laboratory.

Multiple layered denture block and/or disk

A method for manufacturing a nonlinear superelastic file comprising the steps of: providing a superelastic file having a shaft and a file axis; providing a fixture including a file groove being defined by one or more displacement members, the file groove configured for receiving the shaft; inserting at least a portion of the shaft into the fixture along the file groove, the portion of the shaft including a first portion of the shaft; contacting the first portion of the shaft with a first displacement member of the one or more displacement members such that the first portion of the shaft is displaced from the file axis thereby forming a first offset portion of the shaft; heating the portion of the shaft while inserted in the fixture to a temperature of at least about 300&#xb0; C. for a time period of at least about 1 minute to shape-set the portion of the shaft thereby forming a shape-set nonlinear file.

Endodontic instruments and methods of manufacturing thereof

A multi-directional handpiece that includes a motor drive extending along and configured for rotation about a body axis, the motor drive having: a motor gearing at a proximal end of the motor drive; and a file gearing in engagement with the motor gearing for transferring the rotational and axial movement to a workpiece; and a housing for the workpiece; and wherein through rotation of the motor drive, the workpiece moves in an axial oscillating motion while being rotated.

Multi-directional handpiece

This invention designs and builds multiple layers (two layers or more) of various dental devices, specifically denture base or denture, where printed multiple layered denture base with teeth cavities to receive artificial denture tooth materials to form final dental devices, such as partial and full dentures. It can also print denture teeth. This invention also designs and prints multiple layers (two layers or more) of denture base with artificial denture teeth to form final dental devices, such as partial and full dentures. A method for manufacturing a layered denture is provided. The invention provides a multiple layered denture base materials for printing a denture base. The invention also provides a multiple layered denture tooth materials for printing artificial denture teeth. Highly shape adjustable or shape memory polymer layer(s) may be used in these multiple layered denture base forms. Different layer of material has different mechanical and physical properties to meet different need, which provide added benefits to the patients, dental professional and dental laboratory.

Three-dimensional fabricating material systems and methods for producing layered dental products

An endodontic instrument for cleaning/shaping a tooth root canal that includes an elongated shaft composed of a porous material, the shaft having a proximal end portion, a distal end and a tapered working portion having an external surface and a rotational axis, the working portion extending from the proximal end portion to the distal end.

Instruments and coatings formed from a porous material

An adhesion promoter for endodontic sealant compositions for filling and sealing a root canal.

Compositions for endodontic procedures

The present invention is directed to a dental composition, and specifically to an improved composition for endodontic instruments useful for filling root canals or sealing.

Compositions for endodontic instruments

A rotatable endodontic file for cleaning/shaping a tooth root canal, comprising: an elongated shaft having a proximal end portion, a distal end and a tapered working portion having a rotational axis, the working portion extending from said proximal portion to said distal end; the external surface of said shaft working portion having a plurality of at least two spirals, a parallelogram-shaped cross section that has an axis of rotation that is asymmetric such that the center of mass (centroid) is not along the file axis.

A method for manufacturing at least one nonlinear file including the steps of deforming at least a portion of a linear file away from a file axis and heat-treating the deformed file to shape-set the nonlinear file.

Process for producing a shape memory spiral rotary file

Growing community of inventors

Rochester, NY, United States of America

Daniel M Ammon, Jr