Jeneric/pentron Inc.

Jeneric Industries, Inc.

Pentron Clinical Technologies, LLC

Pentron Laboratory Technologies, LLC

American Thermocraft Corporation Subsidiary of Jeneric/pentron

The Argen Corporation

Pentron Corporation

American Thermocraft Corporation

Jeneric/petron, Inc.

Gemetals Corporation

Futurdent Industries Inc.

Pentron Clincal Technologies, LLC

Arun Prasad

Ajit Karmaker

Martin L Schulman

Carlino Panzera

Gregg Daskalon

Elie Zammarieh

Weitao Jia

Grant P Day

Dmitri G Brodkin

Paul Panzera

Bruce H Alpert

Paul J Cascone

Samuel Waknine

Craig Brodersen

Michael Weston

Peter C Gable, Jr

Denise L North

Gordon S Cohen

Grant Bauer

A non-magnetic cobalt based 'noble' metal dental alloy is provided. The alloy generally contains at least 25 wt. % palladium, from 15 to 30 wt. % chromium and a balance of cobalt, where to ensure the alloy is non-magnetic the concentration of chromium in the alloy is at least 20 wt. %, or if the concentration of chromium is less than 20 wt. % the combined concentration of chromium, molybdenum, tungsten, niobium, tantalum vanadium and rhenium is greater than 20 wt. %.

Non-magnetic cobalt-palladium dental alloy

A formable fiber-reinforced composite having an inner core of fiber-reinforced composite surrounded by a sheath of fiber-reinforced composite material. The inner core of fiber-reinforced composite has a plurality of longitudinally extending fibers disposed in a resin matrix material and formed in the shape of a rod. The sheath has woven or braided fibers impregnated with a resin matrix material in the form of a sleeve. A method of manufacturing the formable fiber-reinforced composite material is provided. The longitudinally extending fibers in resin matrix material is cured to provide a solid rod. A sheath is placed around the rod. The rod with sheath is treated (e.g., heat, chemical solution, or both) to remove the resin matrix material. Thereafter, the rod and sheath are impregnated with a resin matrix material. The resin is left uncured or partially cured to provide a formable fiber-reinforced composite material. The formable material may be flattened.

Fiber-reinforced composites for dental materials

A dental post comprising a rod fabricated of fiber-reinforced composite material. The rod comprises a plurality of frustoconical sections arranged coaxially along the longitudinal axis of the rod. Preferably the rod has consistent width along the longitudinal axis wherein the frustoconical sections each have the same tapered width and same length. The number of frustoconical units per rod can vary. The frustoconical sections may vary in shape. Moreover, the rod may include a channel therein extending along the longitudinal axis thereof. The rod may also include one or more grooves extending along the surface thereof.

Fiber reinforced composite post

Dental posts and obturators are manufactured herein having a filling material applied to the apical end of the post and obturator such that the adherence strength between the filling material and the post or obturator is very high. The filling material is adhered to the post and obturator by applying one or more corona or plasma treatments to the surface of the post and obturator and thereafter applying the filling material to the surface-treated post and obturator. The surfaces of the post and obturator are modified by the corona or plasma treatments to create a highly adherent surface for the application of the filling material thereto. Dental restorations are manufactured herein wherein a veneer is applied to a dental substructure and the adherence strength of the veneer to the dental substructure is very high. The veneer is adhered to the dental substructure by applying one or more corona or plasma treatments to the surface of the dental substructure and thereafter applying the veneer to the dental substructure. The surface of the dental substructure is modified by the corona or plasma process to create a highly adherent surface for the application of the veneer thereto.

Method of manufacturing dental posts, obturators and restorations

An endodontic obturator comprising a shaft section and a filler section fabricated of the same material and formed as a single unit. A handle section may be included and may be formed integrally with the shaft section and filler section as a single unit, or may be fabricated separately and attached to the single unit containing the shaft section and the filler section. An endodontic post is provided having a post section and a filler section fabricated of the same matrix material to provide a cohesive bond between the two sections.

Endodontic obturator

A dental restoration comprising a fiber reinforced composite framework and one or more of a randomly dispersed, fiber-filled veneer, a soft particulate filled composite veneer having a strain to failure greater than that of FRC framework and/or a brittle particulate filled composite veneer having a strain to failure value less than that of the FRC framework. The fiber filled veneer is advantageously placed beneath the framework, the soft veneer is advantageously pled where tensile stresses are expected to occur, while the brittle particulate filled veneer is placed where compressive stresses are expected to occur.

Dental bridges comprising fiber reinforced frameworks with fiber or particulate reinforced veneers

Ready-to-use preshaped, prefabricated cured structural components are prepared in a variety of shapes and sizes to be used in the fabrication of dental appliances. Preferably the structural components are fabricated of a fiber-reinforced composite material or a particulate-filled composite material comprising fibers or particulate filler impregnated with a polymeric matrix. The polymeric matrix is partially or fully cured to the point of sufficient hardness to provide a ready-to-use structural component for use in the fabrication of dental appliances such as orthodontic retainers, bridges, space maintainers, tooth replacement appliances, splints, crowns, partial crowns, dentures, posts, teeth, jackets, inlays, onlays, facings, veneers, facets, implants, abutments, cylinders, and connectors.

Prefabricated components for dental appliances

Chromium-cobalt alloys useful for use with high-expansion porcelains in the fabrication of prosthetic dental appliances. The alloys herein comprise cobalt, chromium and manganese as essential components; and include one or more of aluminum, indium, gallium, tin, and germanium; and may include one or more of iron, nickel, palladium and platinum. Optional components include gold, tantalum, niobium, molybdenum, tungsten, vanadium, iridium, ruthenium, rhenium, titanium, silicon, copper, zirconium, hafnium, boron, yttrium, and rare earths metals. The alloys herein are useful with high-expansion dental ceramics and porcelains.

High expansion dental alloys

Dental restorations are fabricated using metal powder. Preferably, the metal powder is a high fusing metal and preferably, the metal powder comprises a non-oxidizing metal. The metal powder is applied to a die and is covered with a covering material such as a refractory die material preferably in the form of a flowable paste. A second covering material may be sprinkled or dusted onto the paste. The model is then dried prior to firing. After drying, the model is sintered to provide a high strength metal restoration. After sintering, the outer shell can be broken off easily with one's hand to expose the sintered coping.

Method for the manufacture of dental restorations

Dental alloys are provided having a coefficient of thermal expansion in the range from about 8 to about 18&times;10 /&deg; C. in the temperature range of 25-500&deg; C. and melting temperatures above about 800&deg; C. but below about 1500&deg; C. The alloys contain gold in combination with a small amount of chromium and/or tantalum. Other elements may also be included with the gold and chromium and/or tantalum to provide the necessary forming, melting, and mechanical properties required to manufacture the desired dental restoration.

Dental alloys

A dental restoration comprises a ceramic core material having a thin metallic layer disposed on the interior surface of the ceramic core to provide integrity to the ceramic core, eliminate bonding between the ceramic core and the patient's tooth or teeth, and provide an impervious layer on the ceramic interior to reduce infiltration of fluids into the ceramic and reduce cracking of the ceramic restoration. The metallic layer may comprise a metal, alloy or metal-matrix ceramic material. A strong, crack-resistant ceramic restoration is provided having highly aesthetic properties.

Metallization of ceramic restorations

Process for the manufacture of dental restorations using high strength ceramic components. A wax pattern is built around a high strength ceramic component on a die. The wax pattern with the high strength ceramic component is surrounded with investment material. The wax is burned out, leaving a mold with the high strength ceramic component. The mold is filled with a ceramic material, covering the high strength ceramic component, creating a dental restoration.

Growing community of inventors

Cheshire, CT, United States of America

Arun Prasad