JAMES R. GLIDEWELL DENTAL CERAMICS, INC.
|JAMES R. GLIDEWELL DENTAL CERAMICS, INC. Patent applications|
|Patent application number||Title||Published|
|20140109797||Method For Manufacturing Coloring Ceramics Via Colloidal Dispersion Followed By Conventional Pressing Techniques - 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.||04-24-2014|
|20140106956||Dental Investment Material - 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° 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° 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.||04-17-2014|
|20140101869||Dental Ceramic Coloring Liquids - 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.||04-17-2014|
|20130338813||Chair Side Mill For Fabricating Dental Restorations - Apparatus for producing finished dental restorations at the dentist's chair side from 3D CAD data. These restorations may be manufactured from ceramics, metals and polymers via subtractive means i.e. milling and grinding. A polar compact mechanism has been employed with the implementation of an inverse kinematic transform in the machine control to allow Cartesian programming. The margin following tool path is very computationally intensive and requires many minutes of calculation time and numerical control programs in excess of 10 mb for a typical restoration. Conventionally this would require the user to wait several minutes before running the machine which would increase the wait time for both the patient and the doctor. This problem is solved by allowing the program to be generated in parallel with the machine in the process of actually cutting the restoration.||12-19-2013|
|20130316306||Method And Apparatus For Preparing A Zirconia Dental Restoration In One Appointment - A method and apparatus that permits a dentist to provide a patient with a monolithic zirconia restoration (i.e., crown) in one office visit. The dentist is provided with a kit of various near net shape (NNS) components of various shapes and shades, chair-side software, and a chair-side milling machine to convert a selected kit component into a finished, fully contoured restoration in about one hour or less. Each such kit component may be, for example, a fully sintered zirconia NNS component having an integral mandrel at a precise location and orientation to minimize the amount of milling time.||11-28-2013|
|20130316305||Method and Apparatus for Preparing a Ceramic Dental Restoration in One Appointment - 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.||11-28-2013|
|20130313738||Method Of Fabricating High Light Transmission Zirconia Blanks For Milling Into Natural Appearance Dental Appliances - 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.||11-28-2013|
|20130244206||PATIENT-SPECIFIC SYSTEM FOR RESTORING MISSING DENTITION - A patient-specific system for restoring missing dentition may include surgical components including a dental implant drilling guide adapted to the patient's dental anatomy, dental implant, drills required to place said implant, and drilling depth and sequence instructions specific to the patient. Further, the system includes a patient-specific healing abutment to form a customized emergence profile, an impression coping with the same emergence profile, a provisional abutment with the same emergence profile, a final abutment with the same emergence profile, a provisional crown or bridge, and a final crown or bridge. The crown or bridge may be screw or cement retained.||09-19-2013|
|20130231239||Method For Coloring Ceramics Via Collidal Dispersion - 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.||09-05-2013|
|20130122469||Indirect Restoration Technology - Dental restorations such as crowns, are made from lithium silicate glass ceramic that is heated and pressed onto a metal substrate, the latter being shaped to an impression or scan of the area of the mouth to receive the restoration. The metal substrate is made from an alloy selected to exhibit a coefficient of thermal expansion which is slightly greater than the CTE of the lithium silicate. In a preferred embodiment, the CTE of the lithium silicate glass ceramic is in the range of 11.5 to 12.5 and the alloy is selected to have a CTE of 12 to 13.5. A palladium tin alloy provides that CTE in the preferred embodiment.||05-16-2013|
Patent applications by JAMES R. GLIDEWELL DENTAL CERAMICS, INC.