Dentsply Research & Development Corp.

Dentsply International Inc.

Scott E Shaffer

Andrew Murray Lichkus

Louis H Tateosian

Mark A Latta

Benjamin Jiemin Sun

Wayne C Bollinger

A method for light-curing polymerizable materials to form a dental device is provided. A light-curing apparatus having at least one integrated lighting and heating source, a curing volume, and a temperature controller, preferably a fan, is used in the method. The light source and temperature controller are used to heat a first polymerizable material to temperatures within a first temperature range. A second polymerizable material is applied on or adjacent to the first polymerizable material. The light source and temperature controller are used to heat the second polymerizable material to temperatures within a second temperature range. The first temperature range has a first midpoint and the second temperature range has a second midpoint. The first midpoint temperature is at least 10&#xb0; C. apart from the second midpoint temperature. The system is particularly suitable for making dental devices such as full dentures, removable partial dentures, relines of full and partial dentures, nightguards, and occlusal splints.

Light curing system and method

A process for producing an artificial tooth comprising: injection molding polymerizable material into a mold to form an outer external polymeric layer. Then injection molding polymerizable material into the mold to form an inner polymeric layer applied on the first external layer. Then injection molding polymerizable material into the mold to form a solid core applied on the inner external layer.

Prosthetic teeth and method of making therefor

A method of forming dental products, such as dentures, denture relines, dental crowns, dental bridges and dental restorative materials, temporary crown, temporary bridge, provisional crown or provisional bridge, from two polymerizable paste compositions each having a complimentary component of a free radical catalyst system and a polymerizable acrylic compound. One of these paste compositions includes an oxidizing agent and a stabilizer and the other includes a reducing agent as components of a redox catalyst system for free radical polymerization. These paste compositions are mixed in a static mixer to form a polymerizing paste composition, which is then shaped into a dental prosthesis. A handheld mixing dispenser useful in carrying out this method, includes a static mixing conduit, and two containers enclosing the polymerizable paste compositions. The static mixing conduit encloses a static mixing member. The containers are adapted to be connected in fluid flow communication with the static mixing conduit. In the paste composition which includes the reducing agent a photoinitiator may be preferably included. Each container is sufficiently oxygen permeable to maintain inhibition of polymerization of the polymerizable paste composition therein for at least 12 months at 23.degree. C.

Method and dispenser for making dental products

A dental prosthesis includes polymeric material formed by heat curing a polymerizable composition having at least 5 percent by weight of at least one polymerizable Monomer having at least one acrylic moiety and a gram molecular weight of at least 200. The polymeric material is preferably formed by heat curing and has an unnotched Izod impact strength of at least 2.5 and more preferably at least 3.0 ft.lb/in as measured by a Modified ASTM D256, and a flexural fatigue life of at least 20,000 flexes to failure at 0.1 inch deflection. Preferably the polymerizable monomer has a vapor pressure less than 5 mm Hg at 23.degree. C. A method of making a denture is provided which includes molding and polymerizing the polymerizable composition to form a denture. Preferably the polymerizable composition includes polymerizable compounds made up of at least 5 percent by weight of the acrylic Monomer having a gram molecular weight of at least 300 and less than 5 percent by weight of Volatile compounds and less than 2 percent by weight of Low Molecular Weight acrylic compounds having a gram molecular weight of less than 200.

Growing community of inventors

Jacobus, PA, United States of America

Scott E Shaffer