Dentsply International Inc.

University of Chicago

Dentsply Sirona Inc.

Argonne National Laboratory

Carolyn M Primus

James L Gutmann

Steven R Jefferies

Miklos M Breuer

Arun S Wagh

Michael C Anderson

Michael C Alpern

A dental composition comprising: a) about 1 to about 80% by weight of particulate material including: (i) calcium silicate, calcium aluminate, tetracalcium aluminoferrite, calcium phosphate, calcium sulfate, silica, alumina, calcium oxide, calcium hydroxide, or mixtures thereof; wherein the particulate material has an average particle size of less than 40 microns; and b) about 1 to about 50% by weight liquid carrier including: (i) water-soluble polymer, and (ii) water.

Methods of treatment of the dental pulp and filling root canals using water-based material

A dental composition comprising: a) about 1 to about 80% by weight of particulate material including: (i) calcium silicate, calcium aluminate, tetracalcium aluminoferrite, calcium phosphate, calcium sulfate, silica, alumina, calcium oxide, calcium hydroxide, or mixtures thereof; and b) about 1 to about 50% by weight liquid carrier including: (i) water-soluble polymer, (ii) surfactant, the surfactant is selected from the group consisting of alkyl sulfates, alkyl ether sulfates, and sarcosinates, and mixtures thereof; and (iii) water; wherein the particulate and liquid carrier being mixed together to form a hydrate gel material that can harden.

Improved compositions comprising a mixture of particulate materials with water-based liquids containing water-soluble polymers and surfactants are provided. Examples of particulate powders include mixtures of calcium silicate, calcium aluminate, calcium sulfate, and hydroxyapatite. Examples of water-soluble polymers include polyvinyl alcohols, polyvinyl pyrrolidone, partially hydrolyzed polyvinyl acetates, polyacrylic acid, and polymethacrylic acid. Surfactants such as sodium dodecyl sulfate are added to the composition to interact with the polymeric materials. The compositions are particularly suitable for sealing and obturating dental root canals and root apices. The composition provides a stable barrier to bacterial and fluid leakage in the root canal system of a tooth. In addition, the compositions help promote the growth of new bone and tissue surrounding the root-tip area or dentin tissue that covers an injured or amputated pulp.

Improved methods for indirect bonding of orthodontic appliances, such as brackets, to the tooth surfaces of dental patients are provided. The methods use a transfer tray to accurately position the brackets on the tooth surfaces. Preferably, the tray is made of an ethylene vinyl acetate copolymer (EVA)/siloxane material. The brackets are coated with a protective coating to prevent them from becoming embedded in the tray. Preferably, a translucent, blue-tinted coating is used to cover the brackets. Dental restorative materials are used to bond the brackets to the teeth. The transfer tray is then removed from the mouth, while the appliances remain firmly bonded to the tooth surfaces.

Methods for indirect bonding of orthodontic appliances

A white, substantially non-iron containing dental material formed from Portland cement. The material may be a dental cement, dental restorative or the like.

Dental material

Improved compositions comprising a mixture of gutta-percha and a hydraulic material containing calcium silicate, calcium aluminate, calcium phosphate, and calcium sulfate compounds are provided. Preferably, the composition includes hydroxylapatite mineral. The composition is particularly suitable for obturating and sealing dental root canals. The composition should provide a stable barrier to bacterial and fluid leakage in the root canal system of a tooth. In addition, the composition should help promote the growth of new bone and tissue surrounding the root tip area.

Gutta-percha compositions for obturating dental root canals

The present invention is directed to magnesium phosphate ceramics and their methods of manufacture. The composition of the invention is produced by combining a mixture of a substantially dry powder component with a liquid component. The substantially dry powder component comprises a sparsely soluble oxide powder, an alkali metal phosphate powder, a sparsely soluble silicate powder, with the balance of the substantially dry powder component comprising at least one powder selected from the group consisting of bioactive powders, biocompatible powders, fluorescent powders, fluoride releasing powders, and radiopaque powders. The liquid component comprises a pH modifying agent, a monovalent alkali metal phosphate in aqueous solution, the balance of the liquid component being water. The use of calcined magnesium oxide as the oxide powder and hydroxylapatite as the bioactive powder produces a self-setting ceramic that is particularly suited for use in dental and orthopedic applications.

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Bradenton, FL, United States of America

Carolyn M Primus