Patents Assigned to James R. Glidewell Dental Ceramics, Inc.
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Publication number: 20240028782Abstract: A computer-implemented method and system of virtual dental restoration design automation includes: receiving a 3D virtual dental model of at least a portion of a patient's dentition, the 3D virtual dental model comprising at least one virtual preparation tooth, the virtual preparation tooth comprising a digital representation of a physical preparation tooth prepared by a dentist; performing an automated virtual restoration design using the 3D virtual dental model; displaying virtually to the dentist one or more physical preparation tooth issues detected while performing the automated virtual restoration design; and displaying virtually to the dentist a generated virtual restoration for one or more adjustments where no physical preparation tooth issues are detected while performing the automated virtual restoration design.Type: ApplicationFiled: July 18, 2023Publication date: January 25, 2024Applicant: James R. Glidewell Dental Ceramics, Inc.Inventors: Michael J. Selberis, Sergei Azernikov, David Christopher Leeson, Maksim Malkov
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Publication number: 20240016705Abstract: A method that includes applying a liquid pre-coloring solution to a gum section of a zirconia dental prosthesis, wherein the liquid pre-coloring solution comprises erbium in an amount of at least 10 wt %, based on the total weight of the composition.Type: ApplicationFiled: June 29, 2023Publication date: January 18, 2024Applicant: James R. Glidewell Dental Ceramics, Inc.Inventors: Yan Yang, Daniel Markowitz, Thienphuc Nguyen, Andrew Schissler, Sreeram Balasubramanian
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Patent number: 11864962Abstract: A method is provided for shaping a custom dental restoration from a preform, wherein the preform comprises a preform body and a preform stem. A method is further disclosed for generating one or more nesting positions for the restoration design within the geometry of the preform body relative to the position of the preform stem. A method is further disclosed for generating machining instructions based on the selected nesting position to optimize machining for chair-side applications.Type: GrantFiled: March 7, 2022Date of Patent: January 9, 2024Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: David Leeson, Marco A. Jokada, Vaheh Golestanian Nemargrdi, Hossein Madanipour
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Publication number: 20230419441Abstract: A computer-implemented method and system compresses CT reconstruction images and can include: receiving a volumetric density file including one or more voxels; replacing one or more voxel density values below an air density value with the air density value; replacing one or more voxel density values above a material density value with the material density value; determining one or more voxels of interest; replacing one or more non-interesting voxel density values below a material surface density with the air density value; replacing one or more non-interesting voxel density values above the material surface density with the material density value; quantizing all voxels to provide a reduced volume image; and compressing the reduced volume image to provide a compressed volume image.Type: ApplicationFiled: August 25, 2023Publication date: December 28, 2023Applicant: James R. Glidewell Dental Ceramics, Inc.Inventors: Fedor Chelnokov, Grant Karapetyan
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Patent number: 11850110Abstract: A method is provided for shaping a custom anterior dental restoration from a preform, wherein the preform comprises a preform body and a preform stem. A method is further disclosed for generating one or more nesting positions for the restoration design within the geometry of the preform body relative to the position of the preform stem. A method is further disclosed for generating machining instructions based on the selected nesting position to optimize machining for chair-side applications.Type: GrantFiled: January 30, 2023Date of Patent: December 26, 2023Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: Marco Antonio Jokada, David Christopher Leeson, Vaheh Golestanian Nemagrdi, Prabhakar Thirugnanasambandam, Kenad Destanovic
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Publication number: 20230404860Abstract: A method for coloring a porous ceramic dental body that includes: applying at least one coating of a liquid coloring composition to at least a portion of a surface area of the porous ceramic dental body, the liquid coloring composition comprising: (a) at least one opaquing agent comprising a material comprising Zn, Al, Si, or a combination thereof; (b) at least one coloring agent comprising a material comprising Fe, Ni, Cu, Mn, Co, Cr, Mo, Pr, Nd, Er, Ce, Tb, or a combination thereof, (c) at least one wetting agent; and (d) at least one solvent; and sintering the coated porous ceramic dental body to obtain a fully sintered ceramic body having a density that is at least 98% of the theoretical density.Type: ApplicationFiled: June 20, 2023Publication date: December 21, 2023Applicant: James R. Glidewell Dental Ceramics, Inc.Inventors: Yan Yang, Sreeram Balasubramanian, Anna Luu
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Patent number: 11847722Abstract: A computer-implemented method and system of CT reconstruction can include receiving one or more CT projection images; performing smooth filtering on the one or more CT projection images to generate one or more smooth boundary filtered images; and back-projecting the one or more smooth boundary filtered images.Type: GrantFiled: November 30, 2020Date of Patent: December 19, 2023Assignee: James R. Glidewell Dental Ceramics, Inc.Inventor: Fedor Chelnokov
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Patent number: 11839665Abstract: A zirconia ceramic material for use in dental applications is provided comprising an yttria-stabilized zirconia material comprising from 4.5 mol % to 5.1 mol % yttria. Optionally, the zirconia ceramic has a coloring agent that may comprise one or more metals selected from terbium (Tb), chromium (Cr), erbium (Er), and cobalt (Co), and further, may, optionally, comprise alumina, which if present may be in an amount from 0 wt % to 0.25 wt %. The zirconia ceramic materials exhibit both enhanced translucency and a flexural strength of at least 800 MPa when fully sintered.Type: GrantFiled: December 9, 2019Date of Patent: December 12, 2023Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: Sreeram Balasubramanian, Tyler Arthur Gubb, Akash, Thomas C. Valenti, Yan Yang, Kevin Michael Recor
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Patent number: 11842484Abstract: A computer-implemented method and system of digitally segmenting teeth in a digital model comprises generating a panoramic image from a 3D digital model of a patient's dentition, labeling, using a first trained neural network, the panoramic image to provide a labeled panoramic image, mapping the labeled panoramic image to corresponding coarse digital surface triangle labels in the 3D digital model to provide a labeled 3D digital model, and segmenting the labeled 3D digital model to provide a segmented 3D digital model. A computer-implemented method and system of generating a panoramic image comprises determining, using a trained neural network, digital tooth bounding region(s) corresponding to digital teeth from a 2D depth map of a patient's dentition, connecting digital tooth bounding region(s) by a spline, determining sampled digital surface points from the sampled spline points; and determining associated digital surface points corresponding to each sampled digital surface point.Type: GrantFiled: January 4, 2021Date of Patent: December 12, 2023Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: Sergei Azernikov, Fedor Chelnokov, Andrey Tolstov, Sergey Nikolskiy
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Publication number: 20230394659Abstract: A computer-implemented method, system, and instructions can include receiving a reconstructed volume of an object; determining an air density and a material density from the reconstructed volume of the object; subdividing the reconstructed volume into one or more blocks, each block comprising one or more voxels; determining one or more contrast blocks within the reconstructed volume; and determining a reconstruction quality based on the number of contrast blocks in the reconstructed volume.Type: ApplicationFiled: August 4, 2023Publication date: December 7, 2023Applicant: James R. Glidewell Dental Ceramics, Inc.Inventors: Fedor Chelnokov, Grant Karapetyan
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Publication number: 20230390042Abstract: A computer-implemented method of processing a digital dental impression includes determining one or more first digital surface regions visible from a first side of the digital dental impression along an occlusion axis and one or more second digital surface regions visible from a second side of the digital dental impression along the occlusion axis, segmenting the digital dental impression into one or more digital segments and determining the one or more digital segments as a first digital segment or a second digital segment based on the majority of digital surface regions in the one or more digital segments.Type: ApplicationFiled: April 6, 2023Publication date: December 7, 2023Applicant: James R. Glidewell Dental Ceramics, Inc.Inventors: Sergey Nikolskiy, Fedor Chelnokov
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Publication number: 20230380943Abstract: Disclosed are example embodiments of a milling bur specifically designed to mill a dental prosthesis from a full-sintered zirconia blank. The milling bur comprises a milling tip configured to have a factor of safety of at least 2 by having a first coverage-percentage of grinding particles covering a surface area of the tip of the milling bur. The factor of safety is a number of times the milling bur can fully mill a dental prosthesis from a fully-sintered zirconia blank.Type: ApplicationFiled: August 3, 2023Publication date: November 30, 2023Applicant: James R. Glidewell Dental Ceramics, Inc.Inventors: Marco A. Jokada, Vaheh Golestanian Nemagrdi, Kenad Destanovic, Marshall L. Fernald, David C. Leeson
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Patent number: 11816835Abstract: Taking a digital implant or abutment level digital impression by means of intra-oral, computed tomography or other imaging method provides the restorative doctor and laboratory accurate and effective data for determining the implant position, angulation and locking feature orientation without a physical impression. Such data is correlated with a digital library to produce an output which enables design and fabrication of an accurate restorative device such as a prosthetic tooth or crown. In this way the time-consuming, costly and error prone mechanical replication of the relevant dental anatomy is obviated.Type: GrantFiled: June 21, 2021Date of Patent: November 14, 2023Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: Grant Bullis, Tao Nguyen, Greg Minzenmayer
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Publication number: 20230348647Abstract: Antimicrobial polymer composite materials are disclosed that are suitable for making oral devices used in dental applications, such as denture bases. Acrylic resin composite materials comprising antimicrobial polymers and antimicrobial fillers provide reduction in common oral microorganisms after long-term aging, with reduced release rate of antimicrobial agents from the composite material. Antimicrobial polymers are prepared from compositions comprising acrylate and/or methacrylate monomers and polymerizable quaternary ammonium silicon-containing compounds.Type: ApplicationFiled: June 29, 2023Publication date: November 2, 2023Applicant: James R. Glidewell Dental Ceramics, Inc.Inventors: Maggie Xiaoxia Liu, Bharathy Thaiyalan, Reid Baker, Nicole Lee Miller
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Publication number: 20230329843Abstract: A method for making a ceramic body comprised of a ceramic material having an inhibitory effect on bacterial growth is provided. A dental prosthesis may be made of a ceramic material that comprises a molybdenum-containing component on a portion of the prosthesis that contacts the gingival surface of a patient. In one method, a porous zirconia ceramic structure is shaped in the form of a dental prosthesis, and then infiltrated with a molybdenum-containing composition, before sintering to densify the ceramic structure.Type: ApplicationFiled: June 23, 2023Publication date: October 19, 2023Applicant: James R. Glidewell Dental Ceramics, Inc.Inventor: Jae Won Kim
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Patent number: 11787747Abstract: A ceramic body is provided that is suitable for use in dental applications to provide a natural aesthetic appearance. A colorized ceramic body is formed that has at least one color region and a color gradient region. A ceramic body is formed having at least two color regions and a color gradient that forms a transition region between two color regions. A method for making the colorized ceramic body includes unidirectional infiltration of a coloring composition into the ceramic body.Type: GrantFiled: April 12, 2021Date of Patent: October 17, 2023Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: Dongkyu Kim, Akash
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Patent number: 11771535Abstract: The present application describes an implant-supported denture device and a method for designing and manufacturing an implant-supported denture device for a patient. A method is described for designing a virtual denture and manufacturing an implant-supported functional fitting replica denture from the virtual denture. An apparatus comprising a functional fitting replica denture is prepared having denture teeth having a fit substantially similar to the final denture. The methods and apparatus described herein reduce the number of visits required to manufacture the final denture.Type: GrantFiled: June 4, 2020Date of Patent: October 3, 2023Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: David Morales, Gilbert A. Rivera, Nhung Tieu Truong Campbell
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Publication number: 20230303459Abstract: A pre-shaded ZrO2 block (e.g., a monochromatic block or polychromatic block) is sequentially infiltrated with a yttrium-containing solution at one porous surface and with water at a second porous surface to make a polychromatic/polytranslucent ZrO2 block.Type: ApplicationFiled: March 24, 2023Publication date: September 28, 2023Applicant: James R. Glidewell Dental Ceramics, Inc.Inventors: Dongkyu Kim, Rajashekharam V. Malyala
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Patent number: 11744683Abstract: A dental resin composite comprising a thermally cured composition of polymeric resin monomers and inorganic fillers that comprise at least 80 wt % total filler loading is provided. Mill blocks made from the dental resin composite and produced via free radical polymerization under high-temperature (approximately 160° C. to 220° C.) and high-pressure process (approximately 300 MPa to 560 MPa) exhibited enhanced mechanical strength and good esthetics suitable for use in CAD/CAM indirect restorations such as, inlays, onlays, crowns and bridges.Type: GrantFiled: June 18, 2020Date of Patent: September 5, 2023Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: Long Ling, Yumeng Ma
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Patent number: 11741569Abstract: A computer-implemented method and system compresses CT reconstruction images and can include: receiving a volumetric density file including one or more voxels; replacing one or more voxel density values below an air density value with the air density value; replacing one or more voxel density values above a material density value with the material density value; determining one or more voxels of interest; replacing one or more non-interesting voxel density values below a material surface density with the air density value; replacing one or more non-interesting voxel density values above the material surface density with the material density value; quantizing all voxels to provide a reduced volume image; and compressing the reduced volume image to provide a compressed volume image.Type: GrantFiled: November 30, 2020Date of Patent: August 29, 2023Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: Fedor Chelnokov, Grant Karapetyan