James R. Glidewell Dental Ceramics, Inc.

Other

Talon Composites

Talon Sports

Perfect Fit Crowns, LLC

Robin A Carden

Frank A Jimenez

Thomas C Valenti

Michael John Selberis

Lauro C Cadorniga

Rodolfo Castillo

Wolfgang Friebauer

Mitchell Godfrey

Steven M Maginnis

Stephen A Ziskind

Edwin Michael First

Adam Szeremeta

Kenneth E Knapp

A dental restoration device includes a sleeve having an exterior surface and an interior pocket that is at least partially filled with a dental cement, and a crown having an exterior surface and an interior surface that is mated to the exterior surface of the crown and bonded thereto by an adhesive disposed between the exterior surface of the sleeve and the interior surface of the crown.

Method and apparatus for dental crown restorations using prefabricated sleeve-crown pairs

Methods and apparatus are disclosed to provide a patient with a monolithic ceramic dental restoration in one office visit. In some embodiments, a dentist is provided with a kit containing one or more machinable blocks, a chair-side milling machine to convert a selected machinable block into a finished dental restoration, and optionally, a scanner. Machinable blocks may have a fully sintered zirconia material solid body and a sintered zirconia mandrel. A plurality of machinable blocks may be provided in multiple shape, size, or shade selections.

Method and apparatus for preparing a ceramic dental restoration in one appointment

In a method of coloring a ceramic material, a coloring solution consisting of metallic salts is introduced to a ceramic slurry. In a slip casting process, a coloring solution consisting of metallic salts is introduced to a ceramic slurry which is cast into green state bodies. A coloring solution that may comprise for example a metallic salt, a solvent, an organic solvent such as derivatives of propylene oxides, and an acid can be introduced to the slip casting process. Such a coloring solution can be added to the slip casting process. In a method, the coloring solution is thoroughly mixed with the ceramic slurry, after which a ceramic body is cast, dried and finally subjected to a sintering process. After final sinter, the resulting ceramic body possesses an innate color that is homogenous throughout its composition. The method is especially useful for coloring zirconia ceramic material used for making dental restorations.

Method for coloring ceramics via colloidal dispersion

A colored ceramic powder is produced from a mixture of coloring solutions consisting of metallic salts that are introduced to a ceramic slurry and subsequently dried. The coloring solution may comprise for example of chosen metallic salts, a solvent, an organic solvent such as derivatives of propylene oxides, an acid and a possible binder. Once all the constituents are thoroughly mixed to a homogeneous state, the slip is dried to a powder form, which spray drying equipment can be used. The dried powder can then be subjected to an isostatic or biaxial press manufacturing process to create a green state ceramic body. Once pressed, the ceramic body can be subjected to a sintering process. After final sinter, the resulting ceramic body possesses an innate color that is homogenous throughout its composition. The method is especially useful for coloring zirconia dental restorations.

Method for manufacturing coloring ceramics via colloidal dispersion followed by conventional pressing techniques

A process for fabricating pre-sintered zirconia blanks that are then computer machined and sintered to form dental appliances having highly advantageous features. The principal steps of a preferred embodiment of that process comprise; a) preparing a ceramic slurry of zirconia powder; b) subjecting the slurry to attrition milling down to about a 5-29 nm crystallite size; c) preparing a vacuum assisted and pressure assisted slip casting mold and pouring the milled slurry into the slip-casting mold; d) after casting, excess slurry is poured from the mold and a consolidated zirconia blank is removed; e) drying the blank and pre-sintering it to form solid blanks ready for CAD/CAM machining and sintering to net shape. The attrition is run with ball bearings that are of the sample material to prevent contamination. It also is run, up to 24 hours, to break down the crystallites to overcome the high density of zirconia.

Method of fabricating high light transmission zirconia blanks for milling into natural appearance dental appliances

Methods and apparatus that permit a dentist to provide a patient with a monolithic ceramic dental restoration (e.g., crown, bridge, or the like) in one office visit. In some embodiments, a dentist is provided with a kit containing one or more near net shape (NNS) millable blanks of various shapes and shades, chair-side software, and a chair-side milling machine to convert a selected millable blank into a finished, fully contoured restoration in about one hour or less. Each such millable blank may be, for example, a dental ceramic (e.g., fully sintered zirconia, fully crystallized lithium silicate, fully crystallized lithium disilicate, or the like) NNS component. In some embodiments, the NNS component includes an integral mandrel at a precise location and orientation to minimize the amount of milling time.

Method for coloring ceramics via collidal dispersion

A process for fabricating pre-sintered zirconia blanks that are then computer machined and sintered to form dental appliances having highly advantageous features. The principal steps of a preferred embodiment of that process comprise a) preparing a ceramic slurry of binderless zirconia powder; b) subjecting the slurry to attrition milling down to about a 5-29 nm crystallite size; c) preparing a vacuum assisted and pressure assisted slip casting mold and pouring the milled slurry into the slip-casting mold; d) after casting, excess slurry is poured from the mold and a consolidated zirconia blank is removed; e) drying the blank and pre-sintering it to form solid blanks ready for CAD/CAM machining and sintering to net shape. The attrition is run with ball bearings that are of the sample material to prevent contamination. It also is run, up to 24 hours, to break down the crystallites to overcome the high density of zirconia.

Coloring in a slip casting process by which a ceramic slurry is cast into green state bodies. It is during this slip casting that a coloring solution consisting of metallic salts is introduced to the slurry and subsequently slip-cast. A coloring solution may comprise for example a metallic salt, a solvent, an organic solvent such as derivatives of propylene oxides, and an acid can be introduced to the slip casting process. Such a coloring solution can be added to the slip casting process. The solution is thoroughly mixed with the ceramic slurry, after which the ceramic body is cast, dried and finally subjected to a sintering process. After final sinter, the resulting ceramic body possesses an innate color that is homogenous throughout its composition. The method is especially useful for coloring zirconia dental restorations.

A coloring liquid especially for shading pre-sintered ceramic dental restorations, utilizes a combination of metal salt, solvent and acid to achieve natural tooth coloring of standard dental shades. By adjusting the respective ingredients, different shades can be provided and color penetration can be sufficient to preserve aesthetics in the sintered restoration even when some of the ceramic material is removed.

Dental ceramic coloring liquids

A new investment material for the pressing loss wax technique for dental glass ceramics. It has been found that the addition of fillers to a magnesium phosphate investment, specifically metal oxides with elevated melting points ranging from 1800 to 2800&#xb0; C., provides a protection barrier against the reaction between the high alkaline content of the glass ceramic and the investment during the pressing process in the range of 800 to 950&#xb0; C. Specifically, it has been found that the addition of aluminum oxide of about 2 to 5 percent of the total dry mix in combination with any of the zirconium oxide, yttrium stabilized zirconium, titanium dioxide and boron nitride in proportions of about 3.5%, enhances the barrier against a surface reaction and improves the thermal properties of the investment.

Dental investment material

Unlike conventional dental ceramic powder made by grinding, dental ceramic nanocrystals are formed by vaporization into individual particles. Tetragonal zirconia particles thus formed are not broken into pieces, and so do not transform to weaker monoclinic zirconia and weaker sintered products. The particles created by this approach can be much smaller, and dental prostheses sintered from this powder can be stronger and more realistic. For instance, the smaller size of sintered tetragonal zirconia crystals increases optical translucence by reducing scattering from birefringence, and the small average particle size and tight distribution of sizes and shapes can essentially eliminate pores in a sintered product. Cylindrical and spherical particles can be manufactured by this approach, whereas prior art dental ceramic particles were generally neither. In addition to tetragonal zirconia, various dental ceramic particles and powders can be made by this approach, which can be used to form various sintered dental prostheses.

Nano-crystalline dental ceramics

A method of production of large Ingots of neutron attenuating composites using a vacuum-bellows system allows for large cross-sectional shapes to be extruded and rolled. This method uses a vacuum-bellows technology which allows the manufacturing of large 8&#x2013;16 inch diameter ingots (50&#x2013;450 lbs. each). A variety of primary metal matrix materials can be used in this technology. High specific strength and stiffness can be achieved because the technology allows for final densities of 99% and higher. The vacuum-bellows technology allows metals and ceramics to blend and mesh together at compression pressures of 800 tons with elevated temperatures. The controlled compression movement allows for any oxide layer, on the metal, to be broken up and consolidated with the chosen ceramic particulate.

Method for fabricating high purity, high density metal matrix composite materials and the product thereof

A method of production of large Ingots of neutron attenuating composites using a vacuum-bellows system allows for large cross-sectional shapes to be extruded and rolled. This method uses a vacuum-bellows technology which allows the manufacturing of large 8&#x2013;16 inch diameter ingots (50&#x2013;450 lbs. each). A variety of primary metal matrix materials can be used in this technology. High specific strength and stiffness can be achieved because the technology allows for final densities of 99% and higher. The vacuum-bellows technology allows metals and ceramics to blend and mesh together at compression pressures of 800 tons with elevated temperatures. The controlled compression movement allows for any oxide layer, on the metal, to be broken up and consolidated with the chosen ceramic particulate. One application is to blend boron-rich ceramics and high purity (99.5&#x2013;99.99%) aluminum particulates together and produce a large ingot using this vacuum-bellows technology. The vacuum-bellows technology allows the ingot to be extruded to large cross-sectional sizes that some applications need (9&#x2013;12 width). By controlling the amount of boron-rich ceramics, by volume or weight, certain B-10 isotope areal densities can be accomplished. These B-10 isotopes attenuate neutrons in nuclear fuel. Other elements, which have high, cross-sectional Barn values can be used. These are, but not limited to, samarium and gadolinium oxides, nitrides, carbides and silicides.

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San Juan Capistrano, CA, United States of America

Robin A Carden