Tooth Forming Patents (Class 264/19)
  • Patent number: 10080629
    Abstract: A dental restorative device is shown as comprising a first cured or hardened layer in the form of an occlusal surface of the tooth being restored and a second uncured dental composite layer joined to the first layer enabling a dental professional to perform direct dental restoration procedures with results replicating indirect direct dental restoration procedures. A system comprising the multi-layered dental restorative device and packaging provides for sufficient support and protection of the uncured second layer and facilitates positioning and finishing of the dental restorative device by cooling the uncured portions to a rigid state while in the packaging, positioning the dental restorative device, and modifying the second layer to fit, curing the second layer and permanently placing the fully cured and hardened dental crown on the tooth being restored.
    Type: Grant
    Filed: January 8, 2015
    Date of Patent: September 25, 2018
    Assignee: RHONDIUM IP LIMITED
    Inventors: Simon P. McDonald, Alejandro Aubone
  • Patent number: 9937024
    Abstract: An axially elongate dental machining portion includes a machining region machinable by a dental machining device, and a fixing region for fixing the axially elongate dental machining portion to a holder of the dental machining device. In the fixing region is a fixing projection oriented transversely relative to a longitudinal axis. In a condition of the machining portion being mounted in the holder, the fixing projection bears against a holding nose positioned in complementary relationship on the holder. The machining region has a machinable surface which has a maximum spacing relative to the longitudinal axis, measured normal to the longitudinal axis, and the fixing projection has a maximum spacing relative to the longitudinal axis, measured normal relative to the longitudinal axis, that is greater than the maximum spacing of the machinable surface relative to the longitudinal axis.
    Type: Grant
    Filed: July 17, 2014
    Date of Patent: April 10, 2018
    Inventor: Heinrich Steger
  • Patent number: 9532930
    Abstract: The invention relates to a composition with at least one polymerizable binder, wherein the composition contains a photoinitiator mixture which contains (a) at least one diacylgermanium compound of general formula (I) in which R1, R2 independently of each other are a linear C1-4-alkyl, or C2-4-alkenyl radical, which can be substituted by one or more polymerizable groups; R3, R4 independently of each other are in each case H, halogen, a branched or linear C1-4-alkyl or —O—C1-4-alkyl radical; R5, R6, R7 independently of each other are in each case H, halogen, a linear C1-20-alkyl, -alkenyl, -alkoxy or -alkenoxy radical, which can be interrupted by one or more —O—, —S— or —NR8— radicals and substituted by one or more polymerizable groups; and R8 independently is in each case H, a C1-20-alkyl, -alkenyl, -alkoxy or -alkenoxy radical, (b) at least one ?-diketone and (c) at least one accelerator, as well as the use of the composition for example for producing a filling composite.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: January 3, 2017
    Assignee: Ivoclar Vivadent AG
    Inventors: Peter Burtscher, Norbert Moszner, Volker Rheinberger
  • Patent number: 9375290
    Abstract: A method for dental restoration that includes disposing a flowable and curable tooth restoration composition into an open cavity of a stent that defines contours of a final design model of a patient's teeth and includes an interproximal contact that has been thinned along an interproximal contact zone but not separated, seating the stent on the patient's teeth such that the flowable and curable tooth restoration composition fills a space between at least one tooth to be restored and the stent, initiating curing of the flowable and curable tooth restoration composition in the stent such that the composition bonds to the at least one tooth to be restored and forms at least one restored tooth and removing the stent from the patient's teeth to expose the at least one restored tooth.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: June 28, 2016
    Assignee: Turn Key Dental Academy, Inc.
    Inventors: Arpad Ferenc Csapo, Karl Edison Hegyi
  • Patent number: 9147524
    Abstract: A magnet is disclosed. The magnet includes a plurality of layers such that a first layer includes a ferromagnetic material comprising iron and a rare earth element; and a second layer includes an alkaline earth metal fluoride and a rare earth oxide. A method of preparing a magnet and an article including the magnet are disclosed. The method includes disposing a first layer including a ferromagnetic material and disposing a second layer over the first layer.
    Type: Grant
    Filed: August 30, 2011
    Date of Patent: September 29, 2015
    Assignee: General Electric Company
    Inventor: Sean Michael Sweeney
  • Publication number: 20150140274
    Abstract: Pre-sintered blanks based on lithium disilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.
    Type: Application
    Filed: May 10, 2013
    Publication date: May 21, 2015
    Inventors: Harald Bürke, Christian Ritzberger, Marcel Schweiger, Volker Rheinberger
  • Publication number: 20150140513
    Abstract: Pre-sintered blanks based on lithium metasilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.
    Type: Application
    Filed: May 10, 2013
    Publication date: May 21, 2015
    Inventors: Harald Bürke, Christian Ritzberger, Marcel Schweiger, Volker Rheinberger, Diana Tauch
  • Publication number: 20150125802
    Abstract: An orthodontic device including positioning aligner, devices allowing incremental movement of teeth and continuous tooth movements appliances is described herein. In particular, it provides an appliance including at least one shell for receiving at least one tooth for repositioning, the shell including a tooth receiving cavity, in which, during use, the tooth may sit; and further including a wire receiving member for receiving a connecting wire, and an anchor. It also provides methods of making and using such appliances.
    Type: Application
    Filed: October 30, 2014
    Publication date: May 7, 2015
    Inventor: Nimrod TAL
  • Patent number: 8973268
    Abstract: A method of making a multi-chromatic dental appliance. A first article can be formed of a first material based on a first digital surface representation having a desired outer shape of the dental appliance. A portion of the first article can then be removed to form an outer layer of the dental appliance comprising a cavity dimensioned to accommodate an inner layer. A second article can be formed by filling the cavity of the first article with a second material. The second material can have at least one different optical property than the first material. The second article can be further processed, as desired. For example, a desired inner shape of the dental appliance can be formed in the second article. Such a desired inner shape can be based on a second digital surface representation of a dental object configured to receive the dental appliance.
    Type: Grant
    Filed: June 6, 2011
    Date of Patent: March 10, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Ryan E. Johnson, Naimul Karim
  • Patent number: 8973269
    Abstract: A method of making a biometric dental appliance. A first article can be formed of a first material based on a first digital surface representation having a desired outer shape of the dental appliance. A portion of the first article can then be removed to form an outer layer of the dental appliance comprising a cavity dimensioned to accommodate an inner layer. A second article can be formed by filling the cavity of the first article with a second material. The second material can have at least one different structural and/or optical property than the first material. The second article can be further processed, as desired. For example, a desired inner shape can be formed in the second article. Such a desired inner shape can be based on a second digital surface representation of a dental object configured to receive the dental appliance.
    Type: Grant
    Filed: June 7, 2011
    Date of Patent: March 10, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Ryan E. Johnson, Naimul Karim
  • Patent number: 8945665
    Abstract: A process for making a dental restoration includes forming a dental restoration base, selecting a decal representing a natural oral cavity characteristic, and attaching the selected decal to the base. Thereafter, the decal and the dental restoration base are conditioned to create a finished dental restoration having desired oral cavity color and characteristics such as teeth, enamel, dentin, crazing lines, stains, veins, blood vessels, bony coloration, hyper-calcification, mucosal tissue or gum tissue. In an alternative embodiment, the process may include placing a sealant over the decal and at least a portion of the dental restoration base. Additionally, a secondary decal may be attached over the sealant, followed by glazing the secondary decal.
    Type: Grant
    Filed: May 6, 2008
    Date of Patent: February 3, 2015
    Inventor: Uriel Yarovesky
  • Publication number: 20140370464
    Abstract: A process for preparing a prosthetic element comprising a glass-ceramic body. including the steps of a) providing a basic body comprising an amorphous glass phase and containing the components of the glass-ceramic body to be prepared, and b) transferring energy to the basic body to induce conversion of a starting phase of the material of the basic body into at least one crystalline phase in a confined region. According to the invention, energy is transferred to the confined region of the basic body by laser irradiating said region with a laser beam having a wavelength of at least 500 nm.
    Type: Application
    Filed: January 21, 2013
    Publication date: December 18, 2014
    Inventors: Alain Kounga, Christoph Appert, Iwona Dziadowiec
  • Publication number: 20140327166
    Abstract: A dental prosthesis, typically formed in a press to metal process, includes application of a porcelain composition sufficient to form a veneer on a dental prosthesis supporting metal structure, the composition having an integrated tooth-like translucency providing an aesthetic appearance. The composition is formed of a dentin frit and an enamel frit, typically sintered into a desired ingot shape including an amount of composition sufficient to veneer the prosthesis. The porcelain composition is a component of a kit that includes opaquers, other porcelains and stains useful in finishing to provide an aesthetic prosthesis.
    Type: Application
    Filed: July 23, 2014
    Publication date: November 6, 2014
    Inventors: Christopher C.Y. CHU, Slawomir BANASIAK
  • Publication number: 20140319713
    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. The casting jig includes an opening through the bottom surface through which an elongate handle may be inserted, allowing a temporary abutment to be coupled into the distal end of the elongate handle, so that the abutment is disposed in the well, held in place by the handle, as it is used as a core about which the anatomical healing cuff body is formed. A crown forming jig for forming an inexpensive, chair-side prepared bis-acrylic temporary crown that may be easily and quickly installed over the anatomical healing cuff body is also disclosed.
    Type: Application
    Filed: July 10, 2014
    Publication date: October 30, 2014
    Inventors: Mark H. Blaisdell, Todd C. Liston
  • Publication number: 20140312517
    Abstract: Refrigerated hydraulic cement compositions comprise a mixture of (a) ?-tricalcium phosphate powder, (b) monocalcium phosphate comprising monocalcium phosphate anhydrous (MCPA), monocalcium phosphate monohydrate (MCPM), or a combination thereof, wherein a 0.1 g/ml saturated aqueous solution of the monocalcium phosphate has a pH less than 3.0, (c) non-aqueous water-miscible liquid, and (d) an aqueous hydrating liquid. The aqueous hydrating liquid is included in an amount of about 1-50 volume percent, based on the combined volume of the non-aqueous water-miscible liquid and the aqueous hydration liquid, and the refrigerated hydraulic cement composition is storage stable for greater than one day, without setting. Methods of forming hardened cements in vivo and/or for forming implants for use in vivo employ the hydraulic cement compositions.
    Type: Application
    Filed: September 10, 2012
    Publication date: October 23, 2014
    Applicant: OSSDSIGN AB
    Inventors: Håkan Engqvist, Jonas Åberg
  • Publication number: 20140272800
    Abstract: Dental prostheses and methods for making them are disclosed. In one embodiment, a method comprises a sequence of steps including milling a cavity in a block of a coping material, filling the cavity with a green ceramic material, milling a portion of the green ceramic material away to leave a layer of green ceramic material on an occlusal surface formed in the coping material, milling the underside of the block of coping material to form the coping with green ceramic material, and sintering the coping with green ceramic material to complete the prosthesis. The milling steps may be performed by a computer-controlled mill. The computer may execute a CAD-CAM program that includes data from a three dimensional model of a tooth that is to receive the prosthesis. The dental prosthesis may be a dental crown or a dental bridge.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Applicant: CMP INDUSTRIES LLC
    Inventor: Devon O. HOWE
  • Patent number: 8821163
    Abstract: Colorless dental compositions for restoring the enamel layer of a tooth are disclosed. The colorless enamel compositions are combined with pigmented dentin compositions to provide a true color match and natural esthetics. Methods that utilize the compositions in placement/build-up techniques in direct restorations are also disclosed.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: September 2, 2014
    Assignee: Ivoclar Vivadent, Inc.
    Inventor: Terry Lee Culp
  • 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
  • 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: 8784112
    Abstract: The present invention relates to a tooth which is used in a dental arch model with which dental students can experience dental works in the oral cavity and practice treatments. More specifically, the present invention relates to a tooth composition for formation trainings such as abutment tooth formation and cavity preparation. Since conventionally used dental arch models have a grinding sensation different from a natural tooth, dental students having completed formation trainings such as abutment tooth formation and cavity preparation by using these conventional models are frequently puzzled to have different grinding and handling properties upon dental works in the oral cavity in practice. That is, these conventional dental arch models are largely different from a natural tooth in grinding sensation including slipperiness and easiness in grinding.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: July 22, 2014
    Assignee: Kabushiki Kaisha Shofu
    Inventors: Yusei Kadobayashi, Hirokazu Sato, Ryuichi Yoshimoto
  • Publication number: 20140178828
    Abstract: The present disclosure relates to methods comprising: producing a real model, comprising a reproduction of at least sections of at least two tooth crowns of teeth in a jaw and contains bracket reproductions or brackets associated with the reproductions of the tooth crowns; and producing at least two trays by producing at least one impression of the real model, wherein the trays each comprise an impression of at least one tooth crown part of the at least two tooth crowns and at least one bracket part of the at least two bracket reproductions or brackets, wherein the at least one bracket part, viewed from the occlusal surface of the associated tooth crown, extends vertically to at most the end of the wire guide and/or the end of the first undercut of the bracket and/or bracket reproduction, which is arranged after the upper wing in the view from the occlusal surface.
    Type: Application
    Filed: April 5, 2011
    Publication date: June 26, 2014
    Inventors: Yong-min Jo, Andreas Urban
  • Publication number: 20140161965
    Abstract: A method for preparing a 3-D impression or replica of small objects. It is particularly aimed at the dental field and provides improved optical texture of an impression or replica of a small object to enable imaging by photogrammetry. A composition useful in the method comprises a liquid curable polymer; macroparticles having a size greater than about 1 ?m in diameter and microparticles present in a size range of less than about 1 ?m such that the macroparticles and microparticles are present in a ratio in the range of between 5:1 and 15:1 (by volume); wherein the impression or replica formed from the composition has a surface particle distribution effective to allow imaging by photogrammetry.
    Type: Application
    Filed: October 31, 2013
    Publication date: June 12, 2014
    Inventor: Malcolm Grenness
  • Publication number: 20140138864
    Abstract: The present invention relates to a kit for indirect production of composite inlays, comprising a polymerizable material for production of a dental model, a polymerizable material for production of an inlay, a polymerizable material for luting of a crosslinked and non-sand-blasted, non-silanized, non-etched, non-primed and non-roughened composite inlay, the surfaces of which have been fully polymerized, in the cavity. Also disclosed is a polymerizable material for increasing the bond strength between the polymerizable material for luting of a crosslinked non-sand-blasted, non-silanized, non-etched, non-primed and non-roughened composite inlay, the surfaces of which have been fully polymerized, in the cavity, and the hard substance of the tooth, and an acid solution for surface etching of the hard substance of the tooth. The invention further relates to methods for producing a composite inlay.
    Type: Application
    Filed: October 7, 2013
    Publication date: May 22, 2014
    Inventors: Manfred Thomas Plaumann, Klaus-Peter Hoffmann, Tobias Bloemker, Alexander Willner
  • Publication number: 20140124969
    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: Application
    Filed: January 10, 2014
    Publication date: May 8, 2014
    Inventors: Mark H. Blaisdell, Todd C. Liston
  • Patent number: 8715546
    Abstract: The process for producing tooth replacement parts is characterized in that curable tooth replacement material is introduced into a first mold of part of the human dentition, a positive model produced from a second mold is pressed into this material and the tooth replacement material remaining after the pressing-in is allowed to cure to form the tooth replacement part(s).
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: May 6, 2014
    Assignee: Ernst Muehlbauer GmbH & Co. KG
    Inventors: Bernd Detje, Hans-Dieter Höhnk, Wolfgang Carl Friedrich Mühlbauer
  • Patent number: 8702425
    Abstract: A temporary supraconstruction for a dental implant or a core for a temporary supraconstruction for a dental implant, characterized in that it includes a material having a modulus of elasticity of less than 300 MPa, preferably in the range of from 15 to 20 MPa.
    Type: Grant
    Filed: September 26, 2007
    Date of Patent: April 22, 2014
    Assignee: VOCO GmbH
    Inventor: Jan Erik Schulz-Walz
  • Patent number: 8685294
    Abstract: Method of producing a dental ceramic structure by digitizing a model or partial model of the prosthesis to be produced and generating a CAD data set, cutting each section of the muffle based on the CAD data set to form the cavity, pressing the ceramic into the cavity by way of at least one sprue, removing the hardened ceramic from the cavity with the sprue or flash and removing the sprue or flash based on the CAD data set.
    Type: Grant
    Filed: December 17, 2004
    Date of Patent: April 1, 2014
    Assignee: Degudent GmbH
    Inventors: Stefan Fecher, Lothar Völkl
  • Patent number: 8636928
    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: Grant
    Filed: October 1, 2007
    Date of Patent: January 28, 2014
    Assignee: DENTSPLY International Inc.
    Inventors: Benjamin Jiemin Sun, Andrew Lichkus
  • Publication number: 20140024003
    Abstract: Provided are a tooth model having parts corresponding to tartar formed uniformly and a method of manufacturing the tooth model. A tooth model (10) used for dental training comprises a main body having a tooth crown (11) molded to look like the shape of a tooth and a tooth root (12), and protrusions (13) seamlessly formed on the surface of the main body, and the main body and the protrusions (13) are composed of the same material. The protrusions (13) and the main body of the tooth model (10) can be integrally molded. Therefore, the repeated use of the common molding die allows the parts corresponding to tartar to be formed uniformly.
    Type: Application
    Filed: December 9, 2011
    Publication date: January 23, 2014
    Inventors: Shigetsugu Iwaki, Kyohei Matsui
  • Patent number: 8628702
    Abstract: A supporting paste containing a component (A) which loses water in a temperature range between 110° C. and 1100° C., a component (B) which is geometrically stable at temperatures between 110° C. and 1100° C., solvent and auxiliary agents. Also, the preparation of such a supporting paste and to its use in particular in the field of dental technology.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: January 14, 2014
    Assignee: Ivoclar Vivadent AG
    Inventors: Konrad Hagenbuch, Volker Rheinberger
  • 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
  • Patent number: 8613874
    Abstract: A method of forming a temporary tooth by fusing a plurality of polymer pellets. The plurality of pellets are fused and molded into the shape of a tooth. Additionally, the formed tooth shape comprises of a adapter shape that allows the formed tooth to be secured to the adjacent teeth of the space of the missing tooth.
    Type: Grant
    Filed: November 10, 2010
    Date of Patent: December 24, 2013
    Inventor: Steven James Howard
  • 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: 20130224688
    Abstract: In one aspect the present disclosure relates to a process for producing a dental article comprising at least two parts, Part A (e.g. coping) and Part B (e.g. veneer), Part A and Part B each having a 3-dim. structure and an outer and an inner surface, the outer surface of Part A having a shape which essentially corresponds to the shape of the inner surface of Part B, Part B comprising a material with a porous section and being produced with the aid of a rapid-prototyping technique, the process comprising a first heating step, wherein Part A is serving as support structure for Part B during said heating step.
    Type: Application
    Filed: November 7, 2011
    Publication date: August 29, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Helmar Mayr, Malte Korten
  • Publication number: 20130203017
    Abstract: A dental implant apparatus including an implant having an external threaded wall adapted to be implanted in a patient's bone, said implant being provided with a cylindrical axial cavity having an internal thread accessible from a first end. The dental implant apparatus further includes a screw comprising a threaded stem adapted to be helicoidally coupled with the internal thread of said cavity of the implant, wherein said screw is a single piece made entirely of a NdFeB (Neodymium-Iron-Boron) compound comprising silicon.
    Type: Application
    Filed: March 15, 2013
    Publication date: August 8, 2013
    Applicant: SUPERCHARGED PRODUCTION S.R.L.
    Inventors: FABRIZIO BAMBINI, ANDREA SANTARELLI, ANGELO PUTIGNANO, MAURIZIO PROCACCINI, MONICA EMANUELLI
  • 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: 20130115573
    Abstract: A dental veneer made from a composite comprising at least one organic binder, preferably with methacrylate, and inorganic solid particles as fillers. Methods for manufacturing the dental veneer include curing the composite with heat and light under pressure followed by laser treating the facial surface of the veneer to form a smoother facial surface. Filler particles at the facial surface of the veneer can be melted and/or coalesced together to form a continuous glass surface, which is more natural looking and better resembles natural tooth material as compared to ceramic veneers or other composited veneers lacking surface treatment.
    Type: Application
    Filed: December 29, 2012
    Publication date: May 9, 2013
    Inventor: Stephan Lampl
  • Patent number: 8425233
    Abstract: A tooth to be used in a jaw tooth model which allows students under dental training to experience oral works and therapeutic practices. More particularly, the present invention relates to a tooth to be used for experiencing morphological studies in the formation of an anchor tooth, the formation of a cavity and so on, particularly a tooth to be used in a jaw tooth model provided with standards for evaluating tooth formation, a method of producing the same, and an apparatus for confirming tooth formation to be used in a jaw tooth model which is provided with standards for evaluating tooth formation.
    Type: Grant
    Filed: June 12, 2006
    Date of Patent: April 23, 2013
    Assignee: Kabushiki Kaisha Shofu
    Inventor: Yusei Kadobayashi
  • Publication number: 20130056892
    Abstract: A method of making a biometric dental appliance. A first article can be formed of a first material based on a first digital surface representation having a desired outer shape of the dental appliance. A portion of the first article can then be removed to form an outer layer of the dental appliance comprising a cavity dimensioned to accommodate an inner layer. A second article can be formed by filling the cavity of the first article with a second material. The second material can have at least one different structural and/or optical property than the first material. The second article can be further processed, as desired. For example, a desired inner shape can be formed in the second article. Such a desired inner shape can be based on a second digital surface representation of a dental object configured to receive the dental appliance.
    Type: Application
    Filed: June 7, 2011
    Publication date: March 7, 2013
    Applicant: 3M INNOVATIVE PROPERTIES COMPANY
    Inventors: Ryan E. Johnson, Naimul Karim
  • Publication number: 20130049241
    Abstract: The present invention provide the dental molded product for milling having the excellent aesthetic quality, compatibility for machine and moldability from the moldable composition. The dental molded product for milling in the present invention was obtained by curing the moldable composition which includes a polymerizable monomer, a polymerization initiator, a first spherical inorganic filler and a second spherical inorganic filler. An average particle size of the first spherical inorganic filler is in the range of 0.2 to 10 micro m. A content of the first spherical inorganic filler is in the range of 50 to 85 mass %. An average particle size of the second spherical inorganic filler is in the range of 0.005 to 0.1 micro m. A content of the second spherical inorganic filler is in the range of 1 to 18 mass %.
    Type: Application
    Filed: June 22, 2011
    Publication date: February 28, 2013
    Applicant: PANASONIC CORPORATION
    Inventor: Masaya Tsujimoto
  • Patent number: 8377500
    Abstract: A process for making a dental restoration includes forming an image which represents a natural oral cavity characteristic. The image may be formed on a computer by an artist or by capturing a photograph of an oral cavity. The computer-based image may be modified with a computer-aided software program. Thereafter, the image is printed as a decal and attached to the dental restoration base. The decal and the dental restoration base are conditioned by a high intensity light or by being fired together in an oven in order to create a finished dental restoration having the desired oral cavity color and characteristics.
    Type: Grant
    Filed: January 27, 2009
    Date of Patent: February 19, 2013
    Inventor: Uriel Yarovesky
  • Patent number: 8366978
    Abstract: A method for determining a sintering shrinkage of a pre-sintered body. The method includes providing a green preform with at least one design feature. The green-preform is pre-sintered to form a white body. At least one change in the at least one design feature with the pre-sintering is recorded. An expected sintering shrinkage to a dense-sintered component is determined using the recorded change.
    Type: Grant
    Filed: November 5, 2007
    Date of Patent: February 5, 2013
    Assignee: Metoxit AG
    Inventors: Stefan Koebel, Wolfram Weber
  • Publication number: 20130017514
    Abstract: A method of manufacturing a ceramic primary crown including mixing a source material including zirconia or alumina that configures a frame of a primary crown, a polymer for reducing viscosity and applying ductility upon injection molding, and a toner for providing the same or similar color as baby teeth, heating the polymer contained in the mixed source material to have ductility, injection molding the heated source material, extracting the polymer to reduce brittleness and increase ductility with respect to the injection-molded matter, removing fat to completely eliminate the polymer element from the injection-molded matter, from which the polymer is partially extracted through the polymer extraction, sintering the fat-removed body, from which the polymer is removed, to improve mechanical properties, and polishing an outer surface of the sintered body to provide gloss, and performing barrel-finishing to remove a burr.
    Type: Application
    Filed: December 14, 2010
    Publication date: January 17, 2013
    Applicant: HASS CO., LTD.
    Inventors: Yong-Su Kim, Hyun-Jun Jeon, Kyung Sik Oh, Sung Ki Kim, Se-Hoon Kim, Joon Hyung Kim, Young Pyo Hong
  • 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: 20120248642
    Abstract: Lithium silicate glass ceramics and glasses are described which can advantageously be applied to zirconium oxide ceramics in particular by pressing-on in the viscous state and form a solid bond with these.
    Type: Application
    Filed: September 26, 2011
    Publication date: October 4, 2012
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Christian Ritzberger, Ricardo Dellagiacomo, Marcel Schweiger, Harald Bürke, Wolfram Höland, Volker Rheinberger
  • Publication number: 20120241991
    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: September 26, 2011
    Publication date: September 27, 2012
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Christian RITZBERGER, Wolfram HÖLAND, Marcel SCHWEIGER, Volker RHEINBERGER
  • 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: 8267695
    Abstract: The present invention relates to a tooth which is used in a dental arch model with which dental students can experience dental works in the oral cavity and practice treatments. More specifically, the present invention relates to a tooth composition for formation trainings such as abutment tooth formation and cavity preparation. Since conventionally used dental arch models have a grinding sensation different from a natural tooth, dental students having completed formation trainings such as abutment tooth formation and cavity preparation by using these conventional models are frequently puzzled to have different grinding and handling properties upon dental works in the oral cavity in practice. That is, these conventional dental arch models are largely different from a natural tooth in grinding sensation including slipperiness and easiness in grinding.
    Type: Grant
    Filed: March 30, 2007
    Date of Patent: September 18, 2012
    Assignee: Kabushiki Kaisha Shofu
    Inventors: Yusei Kadobayashi, Hirokazu Sato, Ryuichi Yoshimoto
  • 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