Tooth Forming Patents (Class 264/19)
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Patent number: 11914173Abstract: The invention relates to a reflector for a vehicle, which includes a main body having a plurality of reflection prisms arranged next to each other for each reflecting light. Each reflection prism has a reflection direction along which the reflection prism reflects the light. The main body has first reflection prisms having a first reflection direction and second reflection prisms having a second reflection direction different from the first reflection direction. The second reflection prisms form at least one symbol.Type: GrantFiled: May 8, 2019Date of Patent: February 27, 2024Assignee: Audi AGInventors: Friedrich-Uwe Tontsch, Benjamin Ettenhuber
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Patent number: 11737957Abstract: A dental curable composition capable of use as a dental material that can substitute part or all of a natural tooth, in particular, a resin material for dental cutting and machining in the field of dental care. When a block shape usable as the resin material is produced, while mechanical properties and aesthetic properties required for a crown prosthetic appliance are maintained, the dental curable composition can be molded and processed with pressure and heating while strain generated in the block is reduced and no cracks and chipping occur. The dental curable composition includes (a) a polymerizable monomer and (b) a filler in a weight ratio of 10:90 to 70:30, and 0.01 to 10 parts by weight of (c) a polymerization initiator and 0.001 to 1 part by weight of (d) a chain transfer agent being a terpenoid compound based on 100 parts by weight of the polymerizable monomer (a).Type: GrantFiled: August 30, 2018Date of Patent: August 29, 2023Assignee: SHOFU INC.Inventors: Toshiyuki Nakatsuka, Toshio Kitamura, Masanori Goto, Tomohiro Kai, Satoshi Takano, Yoshiyuki Jogetsu
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Patent number: 11622918Abstract: A preform intended for the production of a dental prosthesis. The preform includes a group of agglomerated ceramic, glass-ceramic or glass particles, such that, as volume percents: more than 40% and less than 90% of the particles of said group have a size greater than 0.5 ?m and less than 3.5 ?m, said particles hereinafter being denoted “enamel particles”, and more than 10% and less than 60% of the particles of said group have a size greater than 3.5 ?m and less than 5.5 ?m, said particles hereinafter being denoted “dentine particles.” The microstructure of the preform is such that there is an axis X, termed “axis of variation”, along which the Ve/(Ve+Vd) ratio changes continuously, Ve and Vd denoting the volume percents of enamel particles and of dentine particles, respectively. The enamel and dentine particles representing, together, more than 90% of the volume of the agglomerated particles.Type: GrantFiled: April 28, 2017Date of Patent: April 11, 2023Assignee: VITA ZAHNFABRIK H. RAUTER GMBH & CO KGInventor: Michael Sadoun
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Patent number: 11339095Abstract: The invention relates to the use of a printing sol as construction material in an additive manufacturing process for producing a 3-dim article, the printing sol comprising solvent(s), nano-sized crystalline zirconia particles in an amount from 2 to 25 vol.-% with respect to the volume of the sol, the average primary particle size of the nano-sized crystalline zirconia particles being in a range up to 50 nm, a first monomer being a polymerizable surface modification agent represented by formula A-B, with A being capable of attaching to the surface of the nano-sized crystalline zirconia particles and B being a radiation curable group, optionally a second monomer, the second monomer comprising at least one radiation curable moiety but no acidic or silane group(s), photo initiator(s). The invention also relates to a ceramic article obtainable according to such a process.Type: GrantFiled: May 26, 2016Date of Patent: May 24, 2022Assignee: 3M INNOVATIVE PROPERTIES COMPANYInventors: Helmar B. Mayr, Malte Korten, Christine M. Andres, Brant U. Kolb, Holger Hauptmann, Gallus Schechner, Michael Jahns, Kathleen M. Humpal, Melissa A. Lackey, Paul D. Pennington
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Patent number: 11319680Abstract: This invention is a novel retroreflective traffic stripe comprising an exposed top surface containing a widely spaced repeating pattern of linear light-turning prisms and a second repeating pattern of linear prisms between the light-turning prisms, over a bottom surface containing cube corner retroreflective prisms. The two types of top surface prisms are operable under dry and wet weather conditions, respectively. Both types of top surface prisms are configured to use refraction and reflection to redirect light from distant headlights into a downward direction onto the bottom surface of the traffic stripe under dry and wet weather conditions, respectively. Cube corner retroreflective prisms on the bottom surface accept the light and return it in the opposite direction.Type: GrantFiled: December 7, 2021Date of Patent: May 3, 2022Inventor: Mark Joseph O'Neill
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Patent number: 11273019Abstract: The invention relates to a method for producing a dental prosthesis from a prosthesis base and a plurality of prosthesis teeth, characterized by the following chronological steps: providing the prosthesis teeth and the prosthesis base, wherein the prosthesis base comprises a plurality of tooth sockets for locating the basal surfaces of the prosthesis teeth; applying a plastically deformable connecting means onto the tooth sockets and/or basally onto the prosthesis teeth; locating the prosthesis teeth into the tooth sockets of the prosthesis base and in this situation connecting with the aid of connecting means to the prosthesis base in such a way that the prosthesis teeth, after locating in the tooth sockets, are movable in relation to the prosthesis base, wherein the position and the alignment of the prosthesis teeth to the prosthesis base remain retained if no external force effect is exerted onto the prosthesis teeth; changing the position and/or the alignment of at least one prosthesis tooth in the proType: GrantFiled: December 17, 2015Date of Patent: March 15, 2022Assignee: Kulzer GmbHInventors: Jochen Sagolla, Helmut Redemann, Matthias Funk
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Patent number: 11259905Abstract: Disclosed herein are methods and systems for automatically spraying a glaze solution onto a dental prosthesis. The automated spray glazing system includes: a first spray gun; a controller, and a gripper configured to hold the dental prosthesis and to rotate the dental prosthesis about an axis. The controller is configured to rotate the gripper and spray a glaze solution from the first spray gun using a glazing profile based at least in part on a type of the dental prosthesis. The glazing profile is selected such that a cross-sectional thickness of a resulting-glazed material of the dental prosthesis has an average thickness range between 15 to 63 ?m and a standard deviation of less than 6 ?m when measured at locations in an upper half of the dental prosthesis.Type: GrantFiled: November 2, 2018Date of Patent: March 1, 2022Assignee: James R. Glidewell Dental Ceramics, Inc.Inventors: Bahram Bakhshaei, Jimmy Huy Nguyen
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Patent number: 11013583Abstract: A three-dimensional printed dental device formed from rapid prototyping with printable polymerizable materials, the dental device comprising a polymeric composition, wherein the polymeric composition, after curing, has at least one property of flexural strength, flexural modulus, fracture toughness, and work of fracture that is at least 20% greater in measured value at 37° C. in comparison to measured value at 23° C.Type: GrantFiled: October 23, 2018Date of Patent: May 25, 2021Assignee: DENTSPLY SIRONA Inc.Inventors: Benjamin J Sun, Dan Ammon
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Patent number: 10952932Abstract: The invention relates to a blank for producing a tooth replacement part using a CAD/CAM device, comprising a block of a sintered material. Said block of sintered material has already been presintered in a sintering furnace at an initial sintering temperature between 1000° C. and 1250° C.Type: GrantFiled: August 9, 2017Date of Patent: March 23, 2021Assignee: DENTSPLY SIRONA Inc.Inventor: Michael Bäurer
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Patent number: 10080629Abstract: 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: GrantFiled: January 8, 2015Date of Patent: September 25, 2018Assignee: RHONDIUM IP LIMITEDInventors: Simon P. McDonald, Alejandro Aubone
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Patent number: 9937024Abstract: 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: GrantFiled: July 17, 2014Date of Patent: April 10, 2018Inventor: Heinrich Steger
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Patent number: 9532930Abstract: 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: GrantFiled: April 11, 2013Date of Patent: January 3, 2017Assignee: Ivoclar Vivadent AGInventors: Peter Burtscher, Norbert Moszner, Volker Rheinberger
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Patent number: 9375290Abstract: 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: GrantFiled: March 20, 2014Date of Patent: June 28, 2016Assignee: Turn Key Dental Academy, Inc.Inventors: Arpad Ferenc Csapo, Karl Edison Hegyi
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Patent number: 9147524Abstract: 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: GrantFiled: August 30, 2011Date of Patent: September 29, 2015Assignee: General Electric CompanyInventor: Sean Michael Sweeney
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Publication number: 20150140274Abstract: Pre-sintered blanks based on lithium disilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.Type: ApplicationFiled: May 10, 2013Publication date: May 21, 2015Inventors: Harald Bürke, Christian Ritzberger, Marcel Schweiger, Volker Rheinberger
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Publication number: 20150140513Abstract: Pre-sintered blanks based on lithium metasilicate glass ceramic are described which are suitable in particular for the preparation of dental restorations.Type: ApplicationFiled: May 10, 2013Publication date: May 21, 2015Inventors: Harald Bürke, Christian Ritzberger, Marcel Schweiger, Volker Rheinberger, Diana Tauch
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Publication number: 20150125802Abstract: 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: ApplicationFiled: October 30, 2014Publication date: May 7, 2015Inventor: Nimrod TAL
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Patent number: 8973269Abstract: 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: GrantFiled: June 7, 2011Date of Patent: March 10, 2015Assignee: 3M Innovative Properties CompanyInventors: Ryan E. Johnson, Naimul Karim
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Patent number: 8973268Abstract: 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: GrantFiled: June 6, 2011Date of Patent: March 10, 2015Assignee: 3M Innovative Properties CompanyInventors: Ryan E. Johnson, Naimul Karim
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Patent number: 8945665Abstract: 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: GrantFiled: May 6, 2008Date of Patent: February 3, 2015Inventor: Uriel Yarovesky
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Publication number: 20140370464Abstract: 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: ApplicationFiled: January 21, 2013Publication date: December 18, 2014Inventors: Alain Kounga, Christoph Appert, Iwona Dziadowiec
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Publication number: 20140327166Abstract: 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: ApplicationFiled: July 23, 2014Publication date: November 6, 2014Inventors: Christopher C.Y. CHU, Slawomir BANASIAK
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Publication number: 20140319713Abstract: 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: ApplicationFiled: July 10, 2014Publication date: October 30, 2014Inventors: Mark H. Blaisdell, Todd C. Liston
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Publication number: 20140312517Abstract: 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: ApplicationFiled: September 10, 2012Publication date: October 23, 2014Applicant: OSSDSIGN ABInventors: Håkan Engqvist, Jonas Åberg
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Publication number: 20140272800Abstract: 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: ApplicationFiled: March 14, 2014Publication date: September 18, 2014Applicant: CMP INDUSTRIES LLCInventor: Devon O. HOWE
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Patent number: 8821163Abstract: 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: GrantFiled: August 3, 2010Date of Patent: September 2, 2014Assignee: Ivoclar Vivadent, Inc.Inventor: Terry Lee Culp
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Patent number: 8813364Abstract: 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: GrantFiled: December 8, 2010Date of Patent: August 26, 2014Assignee: 3M Innovative Properties CompanyInventors: Gallus Schechner, Michael Jahns
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Patent number: 8801980Abstract: 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: GrantFiled: September 6, 2007Date of Patent: August 12, 2014Assignee: Ivoclar Vivadent AGInventors: Wolfgang Wachter, Walter Pokorny, Gottfried Rohner, Robert Grünenfelder
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Patent number: 8784112Abstract: 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: GrantFiled: October 4, 2013Date of Patent: July 22, 2014Assignee: Kabushiki Kaisha ShofuInventors: Yusei Kadobayashi, Hirokazu Sato, Ryuichi Yoshimoto
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Publication number: 20140178828Abstract: 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: ApplicationFiled: April 5, 2011Publication date: June 26, 2014Inventors: Yong-min Jo, Andreas Urban
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Publication number: 20140161965Abstract: 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: ApplicationFiled: October 31, 2013Publication date: June 12, 2014Inventor: Malcolm Grenness
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Publication number: 20140138864Abstract: 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: ApplicationFiled: October 7, 2013Publication date: May 22, 2014Inventors: Manfred Thomas Plaumann, Klaus-Peter Hoffmann, Tobias Bloemker, Alexander Willner
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Publication number: 20140124969Abstract: 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: ApplicationFiled: January 10, 2014Publication date: May 8, 2014Inventors: Mark H. Blaisdell, Todd C. Liston
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Patent number: 8715546Abstract: 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: GrantFiled: June 14, 2006Date of Patent: May 6, 2014Assignee: Ernst Muehlbauer GmbH & Co. KGInventors: Bernd Detje, Hans-Dieter Höhnk, Wolfgang Carl Friedrich Mühlbauer
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Patent number: 8702425Abstract: 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: GrantFiled: September 26, 2007Date of Patent: April 22, 2014Assignee: VOCO GmbHInventor: Jan Erik Schulz-Walz
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Patent number: 8685294Abstract: 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: GrantFiled: December 17, 2004Date of Patent: April 1, 2014Assignee: Degudent GmbHInventors: Stefan Fecher, Lothar Völkl
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Patent number: 8636928Abstract: 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: GrantFiled: October 1, 2007Date of Patent: January 28, 2014Assignee: DENTSPLY International Inc.Inventors: Benjamin Jiemin Sun, Andrew Lichkus
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Publication number: 20140024003Abstract: 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: ApplicationFiled: December 9, 2011Publication date: January 23, 2014Inventors: Shigetsugu Iwaki, Kyohei Matsui
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Patent number: 8628702Abstract: 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: GrantFiled: December 20, 2006Date of Patent: January 14, 2014Assignee: Ivoclar Vivadent AGInventors: Konrad Hagenbuch, Volker Rheinberger
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Patent number: 8624167Abstract: 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: GrantFiled: March 26, 2009Date of Patent: January 7, 2014Assignee: Ivoclar Vivadent AGInventor: Diethard Bertsch
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Patent number: 8613874Abstract: 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: GrantFiled: November 10, 2010Date of Patent: December 24, 2013Inventor: Steven James Howard
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Patent number: 8572848Abstract: 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: GrantFiled: August 17, 2012Date of Patent: November 5, 2013Assignee: Seiko Epson CorporationInventors: Junichi Hayashi, Michio Ito
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Publication number: 20130224688Abstract: 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: ApplicationFiled: November 7, 2011Publication date: August 29, 2013Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Helmar Mayr, Malte Korten
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Publication number: 20130203017Abstract: 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: ApplicationFiled: March 15, 2013Publication date: August 8, 2013Applicant: SUPERCHARGED PRODUCTION S.R.L.Inventors: FABRIZIO BAMBINI, ANDREA SANTARELLI, ANGELO PUTIGNANO, MAURIZIO PROCACCINI, MONICA EMANUELLI
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Patent number: 8465681Abstract: 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: GrantFiled: October 20, 2007Date of Patent: June 18, 2013Assignee: Ivoclar Vivadent AGInventors: Rudolf Jussel, Harald Bürke
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Publication number: 20130115573Abstract: 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: ApplicationFiled: December 29, 2012Publication date: May 9, 2013Inventor: Stephan Lampl
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Patent number: 8425233Abstract: 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: GrantFiled: June 12, 2006Date of Patent: April 23, 2013Assignee: Kabushiki Kaisha ShofuInventor: Yusei Kadobayashi
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Publication number: 20130056892Abstract: 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: ApplicationFiled: June 7, 2011Publication date: March 7, 2013Applicant: 3M INNOVATIVE PROPERTIES COMPANYInventors: Ryan E. Johnson, Naimul Karim
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Publication number: 20130049241Abstract: 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: ApplicationFiled: June 22, 2011Publication date: February 28, 2013Applicant: PANASONIC CORPORATIONInventor: Masaya Tsujimoto
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Patent number: 8377500Abstract: 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: GrantFiled: January 27, 2009Date of Patent: February 19, 2013Inventor: Uriel Yarovesky