Denture Forming Patents (Class 264/17)
  • Patent number: 10687922
    Abstract: Casting jigs, methods, and kits that may be used in manufacture of anatomical healing caps. A casting jig may include a body having one or more wells within the body, each well being open at a proximal end thereof and having a negative shape corresponding to an anatomical healing cuff body of a given tooth position. Each respective anatomical healing cuff body negative shape includes an asymmetrical cross-section and an irregular surface so that an anatomical healing cuff body having said shape is configured to provide substantially custom filling of at least an emergence portion of a void where a natural tooth once emerged or should have emerged from the void (e.g., in the case of a congenitally missing tooth). The casting jig may further include a socket at a distal end of each well that is configured to receive therein a dental implant or dental implant analog.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: June 23, 2020
    Assignee: ESTHETIC IMPLANT SOLUTIONS, LLC.
    Inventors: Mark H. Blaisdell, Todd C. Liston
  • Patent number: 10603850
    Abstract: A method of molding a thermosetting resin, in particular of the epoxy resin type, in which a first mold is filled with the resin while causing the temperature of the resin to vary in application of a first temperature program, without exceeding the Tg of the resin. After the first mold has been filled, the resin is put under pressure while causing the temperature of the resin to vary in application of a second temperature program, without exceeding Tg, and a drop in the pressure exerted by the resin on the mold is detected with the instant at which this pressure presents a break of slope being identified as the instant t1. A second mold is filled with the thermosetting resin in application of the first temperature program. After the second mold has been filled, the resin is put under pressure in application of the second temperature program until an instant t2 close to t1. As from t2, the temperature of the resin is increased to exceed Tg.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: March 31, 2020
    Assignee: Safran Aircraft Engines
    Inventors: Marc-Emmanuel Techer, Raoul Jaussaud
  • Patent number: 10433939
    Abstract: This invention designs and builds multiple layers (two layers or more) of millable dental blocks or disks for milling of various dental devices, specifically denture base blocks or disks of denture base material, where milled teeth cavities to receive artificial denture tooth materials to form final dental devices, such as partial and full dentures. This invention also designs and builds multiple layers (two layers or more) of millable denture base or denture blocks or disks comprised of denture base or/and denture tooth materials to form final dental devices, such as partial and full dentures. A method for manufacturing a layered denture is provided. The invention provides a multiple layered denture base block (or disk) for milling a denture base. The invention also provides a multiple layered denture block (or disk) for milling a denture. Highly shape adjustable or shape memory polymer layer(s) may be used in these multiple layered forms.
    Type: Grant
    Filed: July 5, 2017
    Date of Patent: October 8, 2019
    Assignee: DENTSPLY SIRONA Inc.
    Inventors: Benjamin Jiemin Sun, Dan Ammon
  • Patent number: 9492252
    Abstract: A method of molding artificial teeth in denture base material comprising forming a U-shaped cavity in a block of denture base material, forming socket cavities in the bottom of the U-shaped cavity, casting a fluid artificial tooth material into the cavities, and causing the fluid tooth material to solidify into solid artificial tooth material while applying pressure. Causing the solidification may include heating the fluid tooth material. The method may include casting a liquid elastomer into a bottom portion of the U-shaped cavity following forming that cavity and prior to the forming the socket cavities, curing the liquid elastomer into a solid elastomeric cushion, and removing the cushion from the U-shaped cavity. Subsequently, the cushion may be inserted into the U-shaped cavity and contacted with the fluid tooth material. A die may then be contacted with the cushion to apply pressure to it and the fluid tooth material during curing.
    Type: Grant
    Filed: February 13, 2014
    Date of Patent: November 15, 2016
    Assignee: CMP Industries LLC
    Inventors: Richard McDermott, Devon O. Howe
  • Patent number: 9174375
    Abstract: The invention relates to a device for production of dental molded parts from a polymerizable plastic, with a flask (16) and with a heating device (40) for heating the polymerizable plastic in the flask (16). The heating device (40) is movable relative to the flask (16).
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: November 3, 2015
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfgang Wachter, Walter Pokorny, Gottfried Rohner, Robert Grunenfelder
  • Publication number: 20150111173
    Abstract: A method for making a dental restoration comprises fabricating a dental workpiece from a pre-sintered dental ceramic material; sintering the dental workpiece defining a sintered dental workpiece; applying a demineralization-inhibiting material inside the pocket or hole of the workpiece; and hardening the demineralization-inhibiting material defining a hardened demineralization-inhibiting portion with an exposed surface exposed in an opening in the sintered dental workpiece.
    Type: Application
    Filed: August 5, 2014
    Publication date: April 23, 2015
    Inventors: Yunoh Jung, Daniel Yonil Jung
  • Publication number: 20140363792
    Abstract: The invention relates to a process for preparing dental restorations, wherein a lithium silicate glass ceramic or a lithium silicate glass is used which contains at least 8.5 wt.-% transition metal oxide selected from the group consisting of oxides of yttrium, oxides of transition metals with an atomic number from 41 to 79 and mixtures of these oxides.
    Type: Application
    Filed: August 22, 2014
    Publication date: December 11, 2014
    Inventors: Christian Ritzberger, Wolfram Höland, Marcel Schweiger, Volker Rheinberger
  • Publication number: 20140300013
    Abstract: Method of forming dental articles by using relatively low sintering temperatures to achieve high density dental articles exhibiting strengths equal to and greater than about 700 MPa. Ceramic powders comprised of nanoparticulate crystallites are used to manufacture dental articles. The ceramic powders may include sintering agents, binders and other similar additives to aid in the processing of the ceramic powder into a dental article. The ceramic powders may be processed into dental articles using various methods including, but not limited to, injection molding, gel-casting, slip casting, or electroforming, hand, cad/camming and other various rapid prototyping methods. The ceramic powder may be formed into a suspension, pellet, feedstock material or a pre-sintered blank prior to forming into the dental article.
    Type: Application
    Filed: April 22, 2014
    Publication date: October 9, 2014
    Applicant: Ivoclar Vivadent AG
    Inventors: Dmitri Brodkin, Moisey Y. Gamarnik
  • Publication number: 20140272798
    Abstract: A method and apparatus for making a denture base disc that is used subsequently to form a removable denture. A vessel with an elastomeric lining is used to form the denture base disc so that the compression of the elastomeric material is approximately equivalent to the shrinkage of the denture base disc material during its polymerization. The vessel and elastomeric lining contained therein work cooperatively to cause the denture base disc to cure in a homogenous manner with consistent pressure on all sides so that residual stresses in the finished disc are minimized.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: CMP INDUSTRIES LLC
    Inventors: Richard McDERMOTT, Devon O. HOWE
  • Patent number: 8828286
    Abstract: Provided is a dental restoration conditioning apparatus including a housing formed with a liquid-tight dental restoration treating space including a liquid drain. The housing is configured with a disposable dental restoration grip including at least one resilient vacuum cup, each of the at least one vacuum cup being in fluid communication with at least one vacuum source.
    Type: Grant
    Filed: February 7, 2011
    Date of Patent: September 9, 2014
    Assignee: Naym 55 Dental Technologies Ltd.
    Inventors: Adi Alphandary, Moises Fleitman, Nitzan Bichacho, Yuval Jacobi
  • Publication number: 20140239527
    Abstract: A composition includes a light-curable viscous mixture that includes: 0-50% by weight of a poly(methyl methacrylate)/methyl methacrylate solution; 5-20% by weight of at least one kind of multifunctional aliphatic (meth)acrylate; 5-40% by weight of at least one kind of aliphatic urethane (meth)acrylate oligomer; 25-65% by weight of at least one kind of difunctional bisphenol-A dimethacrylate; 0.1 to 5% by weight of at least one kind of a photoinitiator; 0.05 to 2% by weight of at least one kind of light stabilizer; and 0.1 to 3% by weight of color pigment based on the total weight of the composition.
    Type: Application
    Filed: April 25, 2014
    Publication date: August 28, 2014
    Applicant: DENTCA, INC.
    Inventor: Jae Sik LEE
  • Patent number: 8813364
    Abstract: Methods for making a layered dental appliance. Some methods can include providing a solid structure (e.g., a die or a dental core, such as a fully sintered ceramic dental core) having a desired outer shape, and applying a first slurry to the solid structure to form a first free form layer on the solid structure. The method can further include solidifying the first free form layer on the solid structure, and machining the solidified first free form layer to a desired shape to form a first article comprising the solid structure and a first shaped layer. The method can further include applying, solidifying, and machining a second layer in a similar way to form a second article comprising the solid structure, the first shaped layer, and a second shaped layer. In some methods, the free form layers are not exposed to a high temperature prior to being machined.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: August 26, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Gallus Schechner, Michael Jahns
  • Publication number: 20140225290
    Abstract: Lithium silicate glass ceramics and glasses containing specific oxides of trivalent elements are described which crystallize at low temperatures and are suitable in particular as dental materials.
    Type: Application
    Filed: October 11, 2012
    Publication date: August 14, 2014
    Applicant: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Volker Rheinberger
  • Patent number: 8801980
    Abstract: The invention relates to a device for production of dental molded parts from a polymerizable plastic, with a flask (16) and with a heating device (40) for heating the polymerizable plastic in the flask (16). The heating device (40) is movable relative to the flask (16).
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: August 12, 2014
    Assignee: Ivoclar Vivadent AG
    Inventors: Wolfgang Wachter, Walter Pokorny, Gottfried Rohner, Robert Grünenfelder
  • Patent number: 8770975
    Abstract: A method of making a dental restoration is provided. The dental restoration comprises a frame and a veneer. An inner veneer surface and an outer frame surface are adapted to be mated with one another to form the dental restoration. The method in particular comprises steps of (a) providing an outer veneer surface; (b) determining an outer frame surface, based on the outer veneer surface; (c) determining an inner veneer surface, based on the outer frame surface; and (d) providing an inner frame surface, based on a natural tooth surface. The method may be advantageous for rapid, precise and inexpensive manufacturing of a dental restoration.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: July 8, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Josef A. Waizenegger, Till Meurer, Thomas B. Hiebel, Bastian P. Kirchner, Michael A. Kraemer
  • Publication number: 20140167300
    Abstract: Photo-curable compositions for artificial teeth and denture base and a method for manufacturing denture by a three-dimensional printing system are provided. The compositions include photo-curable organic compounds, surface modified nano-sized inorganic filler, photo-initiator, colorant, and stabilizer. The composition is in a viscous liquid state having 1500-5000 cps at ambient temperature and has a low viscosity of 50-500 cps at jetting temperature or dispensing temperature. The composition also has an excellent curing rate for three-dimensional printing. Using the compositions, denture having a distinctive denture base and a set of artificial teeth can be manufactured via an inkjet type or digital light process type three-dimensional printing according to Computer Aided Design (CAD) data.
    Type: Application
    Filed: April 18, 2013
    Publication date: June 19, 2014
    Applicant: DENTCA, Inc.
    Inventor: Jae Sik LEE
  • Publication number: 20140170591
    Abstract: A dental arch model and method for making the same is shown and described. The dental arch model includes a connector having opposite ends that connect to a respective one of the arch legs. The connector has a three-dimensional shape but does not include a surface that is both planar and parallel to the base of the arch connector along more than two thirds of the arch connector's length. In certain examples, the connector is in the shape of a prism or a trapezoid. In other examples, the connector has an upper surface that is sloped relative to the base of the arch connector. The arch connector may also include a plurality of fluid passageways for allowing fluid flow from an interior area between the inner walls of the arch connector to a location outside of the connector.
    Type: Application
    Filed: December 16, 2013
    Publication date: June 19, 2014
    Applicant: Global Filtration Systems, a dba of Gulf Filtration Systems Inc.
    Inventor: Ali El-Siblani
  • Publication number: 20140103557
    Abstract: The invention provides methods of making provisional and long-term dental restorations, particularly dental veneers, implants, crowns and bridges. A shell or restoration form made of polymerizable material having good dimensional shape-stability in its uncured condition is used to make the dental restoration. A polymerizable material is introduced into the cavity of the shell form. The outer shell and injected polymerizable material are polymerized and bond together to form a hardened crown structure. In one embodiment, the restoration can be fabricated indirectly by a dental laboratory. In another version, a dental practitioner can make the restoration chairside for a patient in a dental office.
    Type: Application
    Filed: December 18, 2013
    Publication date: April 17, 2014
    Applicant: Dentsply International Inc.
    Inventors: Benjamin Jiemin SUN, Andrew M. LICHKUS
  • Publication number: 20140023989
    Abstract: A denture system comprising: abutments coupled to the fixtures; and a denture to be detachably attached to the abutments, the denture including: a denture base; an artificial tooth supported by the denture base; a plurality of engagement piece members defining slits extending in the up-down direction; and a lid portion connecting end portions of the engagement piece members as well as closing one end of fitting hole in the up-down direction and covering an entire surface of the tip of the abutment, wherein the lid portion configures a part of the denture base, the piece member has a first surface and a second surface, and a grooved allowance portion is provided allowing the piece member to deform and spread in direction from the first surface toward the second surface.
    Type: Application
    Filed: September 24, 2013
    Publication date: January 23, 2014
    Applicant: TUM CORPORATION
    Inventor: Nariyuki BOKU
  • Patent number: 8624167
    Abstract: A device for making a muffle, with which dental restoration parts can be produced with the aid of an embedding compound, at least one press blank and a pressing device, the device having a muffle base, a tubular sleeve surrounding the muffle base and at least one muffle insert which is arranged on the muffle base and can be separated from it. At least two cylindrical press-channel forming elements (16, 18, 20) extend parallel to one another and spaced apart from one another from a flat-formed portion of the muffle insert (12), which can be burned out at least with respect to the forming elements, which elements are formed in a closed manner, and in particular with thin walls, at least on one free end face opposite from the flat-formed portion (14).
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: January 7, 2014
    Assignee: Ivoclar Vivadent AG
    Inventor: Diethard Bertsch
  • Publication number: 20130341812
    Abstract: The present disclosure relates to a dental ceramic article comprising ceramic components, the ceramic components having ZrO2 and Al2O3 and at least one component comprising Mn, Er or mixtures thereof, Al2O3 being present in an amount below about 0.15 wt.-% with respect to the weight of the ceramic article. The present disclosure relates also to kit of parts comprising a ceramic article and a colouring solution and processes for producing a dental ceramic article.
    Type: Application
    Filed: March 16, 2012
    Publication date: December 26, 2013
    Applicant: 3M Innovative Properties Company
    Inventors: Gallus Schechner, Holger Hauptmann, Rainer K. Dittmann, Hans R. Schnagl
  • Patent number: 8572848
    Abstract: A method for manufacturing a dental implant including an abutment is manufactured through the following steps. A titanium molded body production step molds a titanium molded body composition to obtain a titanium molded body having one of male and female thread portions. A ceramic molded body production step molds a ceramic molded body composition to obtain a ceramic molded body having the other thread portion which makes thread coupling with the one thread portion. An assembling step assembles the titanium molded body and the ceramic molded body together so that the one thread portion makes thread coupling with the other thread portion, to obtain an assembled body. A degreasing step degreases the assembled body. A sintering step sinters the degreased assembled body.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: November 5, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Junichi Hayashi, Michio Ito
  • Publication number: 20130249132
    Abstract: Process and systems for molding or forming products from thermosetting plastics. The system utilizes a deformable container that is placed within the cavity of the housing of the mold with the resins and initiator mixed therein. As a piston slides into the cavity, the upper edges of the container engage between the housing and the piston to seal the housing form leakage. The pressure of the piston along with heat on the housing enable the curing process to be controlled to minimize shrinkage and porosity.
    Type: Application
    Filed: February 8, 2012
    Publication date: September 26, 2013
    Applicant: Global Dental Science, LLC
    Inventor: Timothy C. Thompson
  • Patent number: 8524142
    Abstract: The invention concerns a process for producing products of individual geometry, in particular dental prostheses or dental auxiliary parts, comprising the steps of producing a plurality of products on the surface of a substrate plate by means of selective hardening, in particular by means of selective sintering or melting, in which the material is applied in successive layers, after each layer application one or more predetermined regions of the applied layer is selectively hardened by means of an energy-rich radiation and connected to one or more regions of the subjacent layer, wherein the predetermined regions are predetermined on the basis of a cross-sectional geometry of the product in the respective layer. According to the invention the successive layers are applied in layer planes oriented inclinedly relative to the surface of the substrate plate. The invention further concerns an apparatus for carrying out such a process.
    Type: Grant
    Filed: August 23, 2010
    Date of Patent: September 3, 2013
    Assignee: BEGO Medical GmbH
    Inventors: Ingo Uckelmann, Andreas Schwartz
  • Patent number: 8465681
    Abstract: The invention relates to a method for operating a press furnace, in particular for dental materials, with an embedding compound into which the preferably ceramic dental material can be introduced via a press ram (26), the speed of penetration of the press ram (26) being detected, wherein, during the pressing operation, an increase in the speed of penetration and/or a decrease is detected, and, based on this, a signal is output.
    Type: Grant
    Filed: October 20, 2007
    Date of Patent: June 18, 2013
    Assignee: Ivoclar Vivadent AG
    Inventors: Rudolf Jussel, Harald Bürke
  • Publication number: 20130101962
    Abstract: A method for making a denture comprising a base and a plurality of teeth joined thereto. The method comprises forming a first cavity in a block of a denture base material, the first cavity being formed to match the contour of natural teeth as arranged on maxillae or on a mandible; filling the first cavity with a first fluid synthetic tooth material and solidifying the first fluid synthetic tooth material into a first solid synthetic tooth material; removing a portion of the first solid synthetic tooth material to form the plurality of teeth; and removing a portion of the block of denture base material to form the denture base. The steps of the method may be implemented by a computer. An apparatus for making the denture according to certain embodiments of the method, and a denture comprised of a base and artificial teeth are also disclosed.
    Type: Application
    Filed: August 10, 2012
    Publication date: April 25, 2013
    Inventor: Devon O. HOWE
  • Publication number: 20120326343
    Abstract: Methods of producing a dental product are disclosed. Certain methods include the steps of providing a pre-sintered blank made from a green body of ceramic material, performing a machining operation on the blank, and subsequently sintering the blank to its final density in a sintering operation performed at a temperature in the range of 1300° C. to 1650° C. The pre-sintered blank that is provided may have a strength in the range of 53-107 MPa.
    Type: Application
    Filed: June 26, 2012
    Publication date: December 27, 2012
    Applicant: NOBEL BIOCARE SERVICES AG
    Inventors: Cecilia Eriksson, Petrus Brãnnvall, Lars Jörneus, Carina Berggren
  • Patent number: 8304356
    Abstract: The present invention relates to a color adapting composition used for coloring and color adapting porcelain for ceramic crown such as dental restorations and prosthetics, and aluminosilicate glass appropriate for using in a color adapting composition. More specifically, a color adapting composition for dental porcelains are prepared by blending two or more kinds of glass frits having different sintering temperatures from each other and an inorganic pigment or a colored glass obtained by previously dispersing inorganic pigments in glass.
    Type: Grant
    Filed: February 17, 2012
    Date of Patent: November 6, 2012
    Assignee: Kabushiki Kaisha Shofu
    Inventors: Yukio Fukatani, Keiji Takahashi, Ryuichi Yoshimoto
  • Publication number: 20120261848
    Abstract: The subject of the invention is a method to create removable dental prosthesis, and the dental prosthesis making thereof, which solution is suitable for quick and efficient production of removable dental prostheses.
    Type: Application
    Filed: December 22, 2010
    Publication date: October 18, 2012
    Inventor: György Haraszati
  • Patent number: 8268206
    Abstract: A method of making a dental article including a pressable body possessing a flexural strength of at least 125 MPa and flowable at about 850° C. to about 950° C. The body is composed of at least a glass matrix phase having a composition comprising Li2O and MgO.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: September 18, 2012
    Assignee: Ivoclar Vivadent, AG
    Inventors: Dmitri G. Brodkin, Anna B. Verano
  • Patent number: 8257622
    Abstract: The invention proposes a muffle with a pressing channel and at least one mold cavity that is coupled to the pressing channel via at least one connection channel. In this case, in order to increase the pressing pressure and to improve the intermixing of the blank material, it is proposed to arrange at least two blanks (18) side by side in the pressing channel (12).
    Type: Grant
    Filed: November 5, 2008
    Date of Patent: September 4, 2012
    Assignee: Ivoclar Vivadent AG
    Inventors: Harald Gritsch, Max Wörishofer, Christoph Zobler, Thomas Stampfer, Hans-Peter Foser
  • Patent number: 8252213
    Abstract: In preparing dentures, hardened mould material surrounds the denture. This mould material is adhered inside a denture flask with a housing having two separably matable portions. To remove the hardened mould material from the flask, the flask is mounted in a mould press having a shaft, with one of the portions is restrained against movement along an axis of travel of the shaft. A portion of the mould material at an end of the restrained flask portion is available for contact with the shaft along the axis of travel. A capped end of the shaft is forcefully advanced against the adhered mould material therein, thereby breaking the adhesion. After this is done, the denture flask is dismounted from the mould press and the hardened mould material is removed from the first flask portion. If necessary, the process is repeated with the other housing portion.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: August 28, 2012
    Inventor: Paul Kingsley Newton Conrad
  • Publication number: 20120202170
    Abstract: Presently described are dental implant articles, including kits, methods of making dental implant articles and methods of use. The dental implant articles (200) described herein comprise preformed dental implant abutment (210) integrated therein. The preformed dental implant abutment comprises a subgingival implant anchor-receiving end and an opposing end wherein the opposing end is permanently bonded within a sufficiently malleable dental material, which preferably comprises tooth-shaped gingival exterior surfaces (201).
    Type: Application
    Filed: October 21, 2010
    Publication date: August 9, 2012
    Inventors: Ryan E. Johnson, Naimul Karim, Roger K. Dawson
  • Patent number: 8231825
    Abstract: Methods of producing a dental product are disclosed. Certain methods include the steps of providing a pre-sintered blank made from a green body of ceramic material, performing a machining operation on the blank, and subsequently sintering the blank to its final density in a sintering operation performed at a temperature in the range of 1300° C. to 1650° C. The pre-sintered blank that is provided may have a strength in the range of 53-107 MPa.
    Type: Grant
    Filed: May 28, 2008
    Date of Patent: July 31, 2012
    Assignee: Nobel Biocare Services AG
    Inventors: Cecilia Eriksson, Petrus Brännvall, Lars Jörneus, Carina Berggren
  • Publication number: 20120175800
    Abstract: For producing a mother matrix mould of a full or partial dental prosthesis or of a temporary crown or bridge or of a permanent crown or bridge, the data of a digitalised virtual model reflecting the status of the jaw is used to generate a data set of the digital tooth set-up of the full or partial dental prosthesis or of the temporary crown or bridge or of the permanent crown or bridge, based on which a rapid manufacturing or rapid prototyping method is used to produce a functional model of the full or partial dental prosthesis or of the temporary crown or bridge or of the permanent crown or bridge that is then invested in a curable elastic impression material from which the mother matrix mould is produced after curing the elastic impression material.
    Type: Application
    Filed: August 9, 2010
    Publication date: July 12, 2012
    Applicant: HERAEUS KULZER GMBH
    Inventors: Klaus Ruppert, Mario Beyer
  • Patent number: 8206152
    Abstract: Method for producing a base part of a set of artificial teeth, or a set of artificial teeth having a base part, comprising the step of forming the base part by a rapid prototyping process, e.g. 3D lithography and, in particular, 3D laser lithography. Furthermore, the invention relates to a method of establishing a data set representing the shape of a base part of a set of artificial teeth, wherein a gum area or a model thereof is scanned and/or a model of a base part is scanned and/or the shape of the base part is simulated on a computer.
    Type: Grant
    Filed: January 3, 2008
    Date of Patent: June 26, 2012
    Assignee: Institut Straumann AG
    Inventors: Stephan Holzner, Gerhard Weber
  • Patent number: 8168113
    Abstract: A process for the preparation of a ceramic molded part from a suspension/dispersion with a solids content and a fluid content by depositing solids content at the periphery of a porous self-supporting support that is at least partially immersed in the suspension/dispersion and has the same shape as the molded part to be prepared, but with a reduced size, wherein: the solids content contains oxide-ceramic particles; the porous self-supporting support is detachably connected with a discharge in a zone that is not immersed in the suspension/dispersion; the suspension/dispersion is moved towards the porous self-supporting support by means of a positive pressure difference between a pressure prevailing in the suspension/dispersion and a pressure prevailing in the discharge; wherein the fluid content of the suspension/dispersion enters in the porous self-supporting support with depositing solids content at the periphery of the porous self-supporting support.
    Type: Grant
    Filed: October 4, 2007
    Date of Patent: May 1, 2012
    Assignee: Vita Zahnfabrik H. Rauter GmbH & Co. KG
    Inventors: Marc Stephan, Norbert Thiel, Enno Bojemüller
  • Publication number: 20120010066
    Abstract: Slip based on radically polymerizable binder, polymerization initiator and filler, which comprises (A) at least one acidic monomer of general formula I (HG-Y—)aX?Z—PG)b ??Formula I (B) photoinitiator, and (C) ceramic and/or glass ceramic particles.
    Type: Application
    Filed: June 30, 2011
    Publication date: January 12, 2012
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Urs Karl Fischer, Norbert Moszner, Volker Rheinberger, Wolfgang Wachter, Johannes Homa, Werner Längle
  • Patent number: 8034264
    Abstract: The invention relates to compositions based on ZrO2, and single- and multi-colored blanks made from oxide ceramics, and a process for their preparation, in which oxide ceramic powder is coated with a coloring substance, the coated powders are preferably graded and at least one colored powder is filled into a compression mould, the colored powder or powders are compressed to produce a shaped body, and the compressed shaped body is sintered to produce a blank, and to the use of these blanks for the preparation of dental restorations.
    Type: Grant
    Filed: May 18, 2007
    Date of Patent: October 11, 2011
    Assignee: Ivoclar Vivadent AG
    Inventors: Christian Ritzberger, Elke Apel, Wolfram Höland, Frank Rothbrust, Harald Kerschbaumer, Volker M. Rheinberger
  • Patent number: 7925374
    Abstract: A system for production of a dental crown (23, 24) includes identification equipment (2), modeling equipment (9), ordering equipment (6), and an automated production arrangement (16). The latter, as a function of one or more first information items, is arranged to effect production, by means of pressing or pressure-casting, of an integrated dental crown which is made up of two layers. The first layer comprises or consists of porcelain material, and the second layer consists of aluminum oxide, zirconium oxide, etc. The second layer forms a cap, via which the dental crown can be applied to a tooth stump (28) of a patient (1). The invention also relates to a dental replacement component consisting of the dental crown.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: April 12, 2011
    Assignee: Nobel Biocare Services AG
    Inventors: Matts Andersson, Per-Olof Karlsson, Urban Nilsson
  • Publication number: 20100283168
    Abstract: Systems and methods for setting posterior prosthetic teeth in production of upper and lower dentures feature tooth blocks each having inner and outer bodies having upper and lower rows of recesses therein corresponding maxillary and mandibular prosthetic teeth. The recesses of the inner and outer bodies conform to lingual and buccul surfaces of the prosthetic teeth respectively and are shaped and positioned to establish proper positioning of the prosthetic teeth relative to one another when clamped between the bodies. The two tooth blocks accommodate respective ones of left and right prosthetic poster teeth sets. Connection elements between the tooth blocks allow adjustment and subsequent locking of the relative positioning between the left and right teeth sets before setting on mandibular and maxillary casts in an articulator. The two tooth blocks eliminate the need to individually position posterior teeth on each side of the jaw.
    Type: Application
    Filed: May 11, 2010
    Publication date: November 11, 2010
    Inventors: Jory Brock Vandor, Gyula Victor Vandor
  • Patent number: 7811486
    Abstract: Methods of manufacturing hardenable dental articles, packaged hardenable dental articles, and methods of packaging hardenable dental articles are disclosed. In various embodiments, the manufacturing may involve molding a hardenable dental material in a mold cavity that may be lined with a mold liner. The mold body may also form the package of the hardenable dental article formed within the mold cavity. In other embodiments, the hardenable dental articles may be provided in mold cavities located in sacrificial mold bodies that may be torn, stretched, softened, dissolved, etc. to release the hardenable dental articles in the mold cavities.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: October 12, 2010
    Assignee: 3M Innovative Properties Company
    Inventors: Naimul Karim, Darin J. Meyertholen, Robert M. Biegler, Kevin M. Cummings, Lance C. Gore, James R. Kvitrud, Robert W. Peterson, Daniel T. Scott
  • Publication number: 20100216095
    Abstract: A method for creating shaded zirconium-oxide ceramics and a composition created by that method. Shaded yttrium tetragonal zirconium-oxide polycrystals are mixed to achieve a spectrum of final shaded ceramics matching the shades of human teeth. Ceramic material can be in raw form or can be milled and sintered as final product. A method for creating dental prosthetics and the dental prosthetics created by that method.
    Type: Application
    Filed: February 24, 2010
    Publication date: August 26, 2010
    Inventor: Chris Scharf
  • Patent number: 7754115
    Abstract: A ceramo-ceramic dental prosthesis is made from a patient's negative mandibular impression, including at least one working cavity having an inner surface matching the lower surface of the prosthesis to be produced and left at least by one tooth primed by the dental surgeon to be prosthetized. The method of making the prosthesis includes a step of providing a single-unit wax model used for producing by precision casting a single-unit metal model on which is mounted, by the dental technician, a ceramic, the single-unit model having previously been coated with a stripping product to avoid the adherence of the ceramic on the metal single-unit model after the ceramic is cured on the single-unit metal model.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: July 13, 2010
    Inventor: Germinal Veyrat
  • Patent number: 7670516
    Abstract: A system of manufacturing a custom set of pre-manufactured upper and lower dentures is provided. In one form, a set of master upper and lower dentures is created. The master upper and lower dentures are used to create reusable upper and lower dental matrices, respectively. These re-usable upper and lower dental matrices are repeatedly used to manufacture upper and lower pre-manufactured or standard sized dentures, respectively. Optionally, a dental patient can have these upper and lower pre-manufactured dentures custom fit or relined to fit the dental patient's mouth to form upper reline and/or lower reline pre-manufactured dentures. The dental patient can have custom fit dentures in two visits with the dentist, even two visits in the same day.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: March 2, 2010
    Assignee: Indiana Dental Prosthetics, Inc.
    Inventor: Robert L. Rusler
  • Publication number: 20100038807
    Abstract: Solid free form fabrication techniques can be utilized indirectly to manufacture substrates, dies, models, near-net shapes, shells, and wax-ups that are then used in the manufacture of dental articles. Digital light processing is the most preferred indirect method for the production of substrates. After the substrates are produced, various coating or deposition techniques such as gel casting, slip casting, slurry casting, pressure infiltration, dipping, colloidal spray deposition or electrophoretic deposition are used to manufacture the dental article.
    Type: Application
    Filed: October 28, 2009
    Publication date: February 18, 2010
    Applicant: PENTRON CERAMICS, INC.
    Inventors: Dmitri Brodkin, Carlino Panzera, Arun Prasad, Grant P. Day, Stefan Borenstein
  • Publication number: 20100015570
    Abstract: A procedure for dimensionally accurate sintering of a shaped piece manufactured from a blank of porous ceramic material, in which during the sintering, the shaped piece remains connected via at least one first connection like a rib, with a support that is manufactured from the blank. To ensure with simple procedural steps and simple design measures that the geometry does not change during sintering, the invention provides that the support is manufactured as a section of the blank that at least in sections surrounds the shaped piece by materials removal processing from the blank, and after the manufacture, the support, for one, is connected via the at least one first connection with the shaped piece, and for another, via at least one second connection with the residual blank that in sections is separated from the support.
    Type: Application
    Filed: July 17, 2009
    Publication date: January 21, 2010
    Applicant: DEGUDENT GMBH
    Inventors: Martin KUTZNER, Sarah TULLNEY
  • Publication number: 20090321971
    Abstract: Dental articles are produced using relatively low sintering temperatures to achieve high density dental articles exhibiting strengths equal to and greater than about 700 MPa. Ceramic powders comprised of nanoparticulate crystallites are used to manufacture dental articles. The ceramic powders may include sintering agents, binders and other similar additives to aid in the processing of the ceramic powder into a dental article. The ceramic powders may be processed into dental articles using various methods including, but not limited to, injection molding, gel-casting, slip casting, or electroforming, hand, cad/camming and other various rapid prototyping methods. The ceramic powder may be formed into a suspension, pellet, feedstock material or a pre-sintered blank prior to forming into the dental article.
    Type: Application
    Filed: June 24, 2009
    Publication date: December 31, 2009
    Applicant: PENTRON CERAMICS, INC.
    Inventors: Dmitri Brodkin, Moisey Y. Gamarnik
  • Publication number: 20090274993
    Abstract: A manufacturing method and dental component are provided in which first and second cast parts are used with a casting material, such as a gel slurry, to form the dental component. The first cast part can be positioned in a space of the second cast part and a gel slurry can be applied intermediate the first and second cast parts. The gel slurry can then be solidified to form a solidified gel slurry. The first cast part can then be removed together with the solidified gel slurry from the second cast part. The solidified gel slurry can then be machined to form an exterior shape corresponding to a desired exterior shape of the dental component. Finally, the solidified gel slurry can be sintered.
    Type: Application
    Filed: December 22, 2006
    Publication date: November 5, 2009
    Applicant: NOBEL BIOCARE SERVICES AG
    Inventors: Lennart Bergstrom, Erik Laarz, Erik Adolfsson, Ng Sing Boon, Matts Andersson
  • Patent number: 7579387
    Abstract: An article suitable for use as an insulating or coating material comprises a radiation-crosslinked composition comprising a polyethylene, a polypropylene and optionally an ethylene-propylene elastomer. The polyethylene component is selected from high density polyethylene (HDPE), medium density polyethylene (MDPE) and linear medium density polyethylene (LMDPE) and the polypropylene component is either a homopolymer or copolymer. The composition is predominantly based on the polyethylene component and contains the polyethylene component in an amount of at least 50 percent by weight. The article is radiation-crosslinked to a sufficient degree that it possesses thermoset properties, such that when the article is heated to a temperature above the crystalline melting point of the polypropylene homopolymer or copolymer, it is softened but does not become liquid.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: August 25, 2009
    Assignee: ShawCor Ltd.
    Inventors: Peter Jackson, Marcus P. Heydrich, Karen Schnuelle