WO2006106146A1 - Corps vert pour une partie de dent - Google Patents

Corps vert pour une partie de dent Download PDF

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Publication number
WO2006106146A1
WO2006106146A1 PCT/EP2006/061446 EP2006061446W WO2006106146A1 WO 2006106146 A1 WO2006106146 A1 WO 2006106146A1 EP 2006061446 W EP2006061446 W EP 2006061446W WO 2006106146 A1 WO2006106146 A1 WO 2006106146A1
Authority
WO
WIPO (PCT)
Prior art keywords
green body
electrode element
electrode
ceramic
bridge
Prior art date
Application number
PCT/EP2006/061446
Other languages
German (de)
English (en)
Inventor
Thomas Wiest
Stephan Dierkes
Original Assignee
BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG filed Critical BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG
Publication of WO2006106146A1 publication Critical patent/WO2006106146A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0006—Production methods
    • A61C13/001—Electrophoresis coating
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0003—Making bridge-work, inlays, implants or the like
    • A61C13/0022—Blanks or green, unfinished dental restoration parts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • A61K6/818—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising zirconium oxide
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/80—Preparations for artificial teeth, for filling teeth or for capping teeth
    • A61K6/802—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics
    • A61K6/822—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising rare earth metal oxides

Definitions

  • the invention relates to a green body for a toothed part, in particular for a bridge or a crown, and such a toothed part as well as methods for producing the green body and the toothed part.
  • a metal-ceramic crown or bridge as it is present in this classic dental prosthesis, consists of a metallic framework or coping on which a dental ceramic coating has been applied for imitating the appearance of a natural tooth by means of firing or sintering.
  • a classic way to apply this so-called delusion on the metallic body is to lecturschlickern the material with a brush.
  • a method is known to apply ceramic material by means of electrophoresis with subsequent sintering of the ceramic material. Since in electrophoresis the shape can be controlled, can thus be largely dispensed with manual processing of the workpiece before and after sintering.
  • DE 2705770 A1 discloses a method for producing crowns, bridges, etc. in dental technology by electrophoretic deposition on a base molding made of stainless metal. By electrophoresis, a layer thickness in the range of 80 to 100 microns is achieved. If a noble metal alloy is used for the basic molding, a metallic intermediate layer is applied before the electrophoretic application of the ceramic layer, in particular a zinc or tin layer by electroplating.
  • a disadvantage of the method known from DE 2705770 A1 is that the metal electrode formed by the basic molding has a negative influence on the translucency of the finished tooth part, whereby the appearance of a natural tooth is mimicked in an inadequate manner.
  • the parent article is exposed to saliva, which can lead to undesirable changes in the material and patient health problems attributed to a lack of biocompatibility of the material.
  • the optionally introduced metallic intermediate layer is not resistant to burning or sintering for the completion of the tooth part, in particular not under atmospheric conditions, whereby the mechanical properties of the bonding region of ceramic and metallic base molding are adversely affected.
  • DE 100 49 971 A1 describes a dental molding and a method for its production.
  • the dental molding according to DE 100 49 971 A1 is cap-shaped deposited on a metallic electrode, from which it is before the
  • Completion is removed from the mold.
  • the electrode is in this case modeled on the tooth stump, on which the dental molding is to be placed.
  • a ceramic material suitable for the dental field is a chemically resistant, corrosion-resistant and biocompatible material.
  • WO 99/50480 describes a method for the electrophoretic deposition of ceramic bodies in dental applications. With the method, all-ceramic tooth parts are produced, which in particular are metal-free. In this case, a ceramic green body is produced on a deposition electrode by means of electrophoretic deposition, wherein the electrode is removed from it before the sintering of the green body. However, there is no way to create bridges.
  • WO 2004/041 1 13 a method is presented in which all-ceramic tooth parts with a predetermined spatial shape, such as bridges, are generated by means of electrophoresis.
  • a conductive or conductive made platelets on a working model or a scaffolding part is arranged directly or at a distance.
  • the resulting green body contains the ceramic layer in addition to the - A -
  • conductive plates which may be made of aluminum, nylon or paper, for example. From this green body is produced by sintering, so a thermal treatment, the all-ceramic. The plate is burned out, forming a cavity, or, as in the case of aluminum, it reacts with the oxygen in the atmosphere to form an oxide, which then remains in the tooth part.
  • the primary object of the present invention is to provide a toothed part and a method for its production, in which the above-mentioned
  • the present invention relates according to a first aspect of a green body for a tooth part, in particular for a bridge, but also for example for a crown, with an electrically conductive, metallic electrode element having a melting point above 800 0 C and an electrophoretically deposited thereon coating of ceramic material, wherein the electrode element is chemically inert to a sintering and a glass infiltration of the ceramic material at least in the temperature range up to 800 0 C under atmospheric conditions and the coating has a thickness of at least 500 Dn.
  • the invention also relates to a toothed part, in particular a three- or more-membered bridge or a crown, with an electrically conductive metallic electrode element having a melting point above 800 0 C and a subsequently deposited electrophoretically and then sintered coating of ceramic material, wherein the coating has a thickness of at least 500 dn.
  • such a green body is produced according to a method having the following steps:
  • Ceramic material at least in the temperature range up to 800 0 C below
  • Atmospheric conditions is chemically inert
  • Tooth part in particular a bridge or a crown, comprising the steps: - Producing a green body for the tooth part according to the inventive method described above, and Sintering the green body to the tooth part under conditions in which the electrode element is not changed by the sintering.
  • the sintering of the green body takes place at a temperature which is below the melting point of the material of the electrode element and is selected so that the electrode element remains chemically inert and dimensionally stable during the sintering process.
  • the thermal expansion of the electrode element which accompanies the thermal treatment and is generally unavoidable is not understood here as a change.
  • atmospheric conditions By “atmospheric conditions” is meant in this text the presence of a gas composition with about 20% oxygen and possible admixtures of other reactive gases, as they are generally termed "air”. is designated, wherein the gas composition has a pressure of about 1 bar.
  • the finding underlying the invention is that it is possible to achieve the above-mentioned advantages of a full ceramic tooth part, namely the avoidance of color changes and physical incompatibilities, without the risk of weakening or damage, as in the case of the above acknowledged prior art known all-ceramic tooth parts, by providing a comparison with the further processing steps of the green body resistant electrode element is provided with a sufficiently thick ceramic coating. If the electrode element is designed in such a way that it does not react chemically during sintering and glass infiltration under atmospheric conditions, ie in the presence of oxygen and other reactive gases, such as water vapor, a weakening of the ceramic composite which otherwise accompanies such a reaction is avoided.
  • the main focus in the choice of the electrode element according to the invention is directed to the fact that a high chemical resistance and dimensional stability during sintering and a possible glass infiltration is guaranteed, so that it may come to a slight weakening of the material properties of the green body or the ceramic. Also, an effect on the optical property of the tooth part (color, translucence, etc.) is almost impossible and the question of biocompatibility does not arise when the electrode element is completed by the sintered and optionally glass-infiltrated ceramic to the outside so that no interaction can take place.
  • the electrode element consists of a foil and / or a pin or comprises a foil and / or a pin. If one considers a foil as an electrode element, then only a small amount of material is required for the electrode element, so that the production costs can be reduced, in particular in the case of cost-intensive materials, compared to solid electrode elements similar to the tooth part to be produced.
  • a film preferably has areas which in use serve for depositing connecting ceramic between the side members and the intermediate member of a bridge to be generated, and areas on which an occlusal or gingival portion of the intermediate member is deposited. An optionally existing extension of the electrode element for the gingival area can advantageously be used for contacting.
  • the electrode element is a pin or a foil whose coating with ceramic only serves as a connector between the stumps.
  • a pin has the advantage that, as a stabilizing element, it can improve the mechanical stability of the green body, which results in easier handling of the green body.
  • An advantage of the embodiment as a conductive film is that it can be achieved in the electrophoretic deposition, a spatial form of the green body, which corresponds substantially already the final desired spatial shape of the patient to be used tooth part, so that only a few reworking are necessary. As a result, effort is saved and thus achieved a cost reduction.
  • the difference of the average values of the thermal expansion coefficients of the ceramic and the electrode member in the range of 3O 0 C to 1000 0 C in the range of 0 to 2 d O "6 K" 1, preferably from 0 to 0.5 d 0 '6 K "1 , ie that the coefficients of thermal expansion are close to each other on average.”
  • the mean values of the coefficients of thermal expansion of the materials used substantially correspond, no or at most negligible Tensions in the composite due to possibly uneven thermal expansion. As a result, a weakening of the material of the green body is avoided.
  • the electrode member is made of a material having a melting point above 1000 0 C, preferably above 125O 0 C, is located.
  • the electrically conductive metallic electrode element to be used according to the invention is chemically inert up to a temperature of at least 1000 ° C., preferably 1250 ° C. under atmospheric conditions. Melting of the electrode element material is about to be avoided during sintering, which is preferably carried out at a temperature of 1000 0 C to 1250 0 C, since on the one hand with the melting volume change would be connected, which could generate stresses in the ceramic material, and on the other could distribute the melt in the ceramic material in a way that is difficult to control.
  • an electrode element consisting of one or comprising a material selected from the group consisting of: platinum, titanium, gold, tungsten, niobium, tantalum and alloys in a proportion of more than 75 weight percent of one or more of these metals , wherein those alloys are of course preferred with respect to the alloys whose melting point is above 1000 0 C or 1250 0 C and which are stable up to these temperatures.
  • a ceramic material consisting of one or comprising a material selected from the group consisting of: alumina, zirconium oxide and mixtures thereof (eg, a mixture with 69 weight percent Al 2 O 3 and 31 weight percent Ce-stabilized ZrO 2 ). These materials are particularly suitable for use in the dental field.
  • the coating has a thickness in the range of 500 microns to 5 mm, in particular for the production of intermediate bridge members preferably in the range of 1 to 3 mm, which can be achieved without an excessively long coating time that the metal electrode not through The ceramic material shines through and falsifies the natural impression of the tooth part.
  • the electrode element is arranged in the case of a three-part anterior bridge in the intermediate bridge element.
  • the use of a remaining in the green body and compared to a sintering, even under atmospheric conditions, resistant, ie in further processing - at least at temperatures up to 800 0 C - non-melting and chemically inert, electrode element is particularly suitable for an electrophoretic formation of an intermediate bridge member.
  • the coating is glass-infiltrated and / or veneered with ceramic, wherein any existing pores of the tooth part are preferably filled by the glass infiltration and / or the tooth part preferably has a natural look as possible due to the veneer.
  • At least one further electrode element for electrophoretic deposition thereon is introduced into the ceramic slurry bath with the first electrode element and the electrophoretic deposition on the first electrode element and on the at least one another electrode element is (i) started and / or terminated at different times and / or (ii) controlled so that different layer thicknesses are achieved. If the time duration or the time range in which an electrophoretic deposition is performed on the electrode elements is different, then, as in case (ii), different layer thicknesses of the respective coatings on the electrode elements can be achieved.
  • the deposition rates on the first and the further electrode elements in case (i) are controlled in such a way that the layer thicknesses do not differ despite different start and / or end of the deposition, this results in different properties of the respective coating regions.
  • a combination of different deposition rates and times is also possible.
  • the different coating areas can also be made different in thickness by applying different voltages to different electrode elements.
  • the further electrode element is a molded stump of a working model provided with a conductive surface, in particular a plaster stump provided with silver conductive paint. Due to the shape specification through the stump, a desired spatial form of the green body and thus of the tooth part produced therefrom can be achieved in a simple manner. Reference is made in this respect to the process designs according to WO 99/50480, WO 2004/041 1 13, WO 2005/023139, EP 1475462 and DE 10021437 A1, which can be used here - adjusted accordingly.
  • WO 99/50480 describes the production of a toothed part using a molding made of a hardenable moldable material provided with a conductive paint, eg silver paint or silver paint, such as gypsum or wax, or a moldable conductive polymer.
  • a conductive paint eg silver paint or silver paint, such as gypsum or wax
  • plaster stumps are rendered conductive by immersion in a concentrated saline solution and used as electrode elements.
  • DE 100 21 437 A1 describes a process for producing all-ceramic frameworks in which the stump of a Working model is coated with a film or a release agent. This coating is made electrically conductive and dipped the sump for coating in ceramic slip.
  • a membrane electrophoresis is proposed for the production of copings and crowns. This is not deposited directly on the electrode, but on a membrane, which is located in front of the electrode.
  • the first electrode element is particularly advantageously arranged in the electrophoretic deposition between two further electrode elements, in particular gypsum stumps provided with silver-conductive lacquer, wherein the electrophoretic deposition on the two further electrode elements is started after the beginning of the electrophoretic deposition on the first electrode element.
  • the electrophoretic deposition on the two further electrode elements is started after the beginning of the electrophoretic deposition on the first electrode element.
  • At least one separate deposition element is introduced into the ceramic slurry bath with a surface destabilizing the ceramic slurry, so that ceramic material is deposited on the deposition element from the ceramic slurry bath.
  • a coating on the deposition element can thus also be achieved in that the ceramic material is deposited thereon from the ceramic slurry due to the destabilizing effect of the surface of the deposition element.
  • the use of means necessary for an electrophoretic deposition can be limited to the first electrode element, which means an apparatus simplification.
  • the ceramic material preferably used in the method for producing a green body according to the invention comprises or consists of a material selected from the group consisting of: alumina, zirconia and mixtures thereof (eg, a mixture containing 69 wt% Al 2 O 3 and 31 wt% Ce-stabilized ZrO 2 ), wherein the Keramikschlickerbad comprises as suspending agent an alcohol, in particular ethanol, and / or water.
  • FIG. 1 a shows a first exemplary embodiment of a first electrode element according to the invention
  • 1 b shows a second embodiment of a first electrode element according to the invention
  • Fig. 2 shows a green body according to the invention for a three-membered bridge with two stumps in cross-section and
  • FIG. 3 shows a cross section of a toothed part according to the invention produced by sintering from the green body shown in FIG. 2.
  • Fig. 1a shows a first embodiment of a first electrode element 1 according to the invention in the form of a film.
  • the first electrode element 1 is particularly suitable for being inserted in the intermediate bridge member of a three-element bridge (not shown) at the location of an anterior tooth.
  • the first electrode element 1 has a central region in the illustration, which is partially surrounded by two arms 2a, 2b of the electrode element.
  • a central web element 3 extends between the arms 2a, 2b, so that the arms 2a, 2b form the shape of an "E" with the central web element 3.
  • the electrode element 1 for the preparation of an anterior tooth bridge is usually arranged vertically, so that the "E" lies approximately parallel to the anterior tooth surface.
  • FIG. 1 b shows a second exemplary embodiment of a first electrode element 10 according to the invention in the form of a foil.
  • the first electrode member 10 is particularly adapted to be inserted in the intermediate bridge member of a three-link bridge (not shown) at the location of a molar or premolar tooth.
  • the first electrode element 10 has a central region in the illustration, which is enclosed by a ring element 11.
  • two connecting web elements 12a, 12b are arranged, which end in their outer regions in widenings 13a, 13b.
  • a basal or ginigival web element 14 connects to the ring element 1 1.
  • the occlusal regions of the coating are deposited.
  • Connecting web elements 5a, 5b and 12a, 12b ensure during the coating that the intermediate bridge member connects the side members of the bridge.
  • the basal or gingival web elements 4, 14 provide a coating which in the tooth part of the basal or gingival
  • FIG. 2 shows a green body 20 according to the invention for a three-part bridge with two shaped stumps 22a, 22b in cross-section.
  • the green body 20 comprises as first electrode element 24 a horizontally arranged film.
  • the mold stubs used as further electrode elements 22a, 22b are made of gypsum and are each provided with a conductive surface 26a, 26b, which extends to a preparation boundary.
  • the preparation boundary is defined by protrusions 28a, 28b that encircle the shaped stumps 22a, 22b.
  • the shaped dies 22a, 22b are fixed in a manner known per se to a base plate 30, on which further means (not shown) used for the electrophoresis are arranged.
  • the first electrode element 24 is located in the region of the tooth to be replaced by the bridge between the shaped dies 22a, 22b in the region of the conductive surfaces 26a, 26b. Fabrication of the green body 20 through the coating 32 extending around the electrode member 24 and around the die stubs 22a, 22b to their respective preparation margins defined by the projections 28a, 28b will be described below.
  • the above-described prepared model consisting of mold stubs 22a, 22b and electrode element 24 (with corresponding electrical leads) is introduced into a ceramic slurry bath (not shown) in which a counterelectrode (not shown) is provided as an anode for electrophoresis.
  • the ceramic slurry contains Al 2 O 3 , corresponding to the InCeram® Alumina powder from Vita, ethanol as suspending agent, as well as a plasticizer and a binder.
  • the mixing ratio is 76g ceramic material to 18.8g ethanol.
  • the counter electrode in the ceramic slurry forms the anode, while the electrode element 24 and the die stubs 22a, 22b are used as cathodes.
  • a voltage of 20 V is applied between the counter electrode and the electrode member 24, whereby a first portion of the coating 32 is formed around the electrode member 24 by electrophoretic deposition.
  • the surfaces 26a, 26b of the die stubs 22a, 22b also receive the voltage of 20 V compared to FIG Counter electrode.
  • the electrophoresis is stopped and the resulting green body 20 is removed from the Schlickerbad.
  • the green body 20 is thermally treated together with the molding dies 22a, 22b at 200 0 C for one hour.
  • the mold stumps 22a, 22b shrink as a result of the drainage of the plaster.
  • the green body 20 can be removed from them.
  • the sintering of the green body 20 to the tooth part takes place for 2 hours at 1 12O 0 C under atmospheric conditions in which the electrode member 24, however, remains chemically inert and does not melt, so does not change.
  • FIG. 3 shows a toothed part 40 according to the invention produced by sintering from the green body 20 shown in FIG. 2 in cross-section.
  • the toothed part 40 (tripartite bridge) comprises the electrode element 24 and a ceramic layer 42 applied thereto and sintered.
  • At the positions of the shaped stumps there are recesses 44a, 44b in the toothed part 40, which reproduce the shape of the molded stumps.
  • the tooth part 40 can thus be placed on the dental stumps located in the mouth of the patient and attached thereto.
  • the electrode element 24 is completely surrounded by ceramic material 42, so that it is insulated from the outside, which is why no reactions, for example with saliva, are possible.
  • the electrode element is provided with a coating by means of electrophoresis and also remains in a sintering and glass infiltration in the green body or tooth part produced therewith. Since the electrode element undergoes no significant change in volume relative to the deposited ceramic material, only negligible stresses occur in the composite material, which do not lead to any appreciable mechanical weakening. Also, the electrode element is chemically inert, which also avoids other possible sources of attenuation.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Dentistry (AREA)
  • Molecular Biology (AREA)
  • Manufacturing & Machinery (AREA)
  • Dental Prosthetics (AREA)

Abstract

La présente invention concerne un corps vert (20) pour une partie (40) de dent, en particulier pour un bridge ou une couronne, une partie (40) de dent de ce type ainsi qu'un procédé de production du corps vert (20) et de la partie (40) de dent. L'objet de la présente invention est la mise au point d'un procédé permettant la fabrication d'un corps vert (20) ainsi que d'une partie (40) de dent, qui n'entraîne dans la mesure du possible aucun affaiblissement mécanique du produit fini, la partie (40) de dent devant être, dans son utilisation, biocompatible, résistante à la corrosion et résistante aux produits chimiques et devant imiter de manière optimale la dent naturelle lorsqu'elle est posée chez le patient. A cet effet, un corps vert (20) selon la présente invention pour une partie (40) de dent, en particulier pour un bridge ou une couronne, possède un élément électrode (24) métallique électroconducteur ayant un point de fusion supérieur à 800 °C et une couche de revêtement (32) en matière céramique déposée sur l'élément électrode par électrophorèse. L'élément électrode (24) est chimiquement inerte vis-à-vis d'un frittage et d'une infiltration de verre de la matière céramique au moins dans la plage de température allant jusqu'à 800 °C dans des conditions atmosphériques, et la couche de revêtement (32) possède une épaisseur d'au moins 500 µm.
PCT/EP2006/061446 2005-04-07 2006-04-07 Corps vert pour une partie de dent WO2006106146A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005016203A DE102005016203B4 (de) 2005-04-07 2005-04-07 Grünkörper für ein Zahnteil, Zahnteil sowie Verfahren zu deren Herstellung
DE102005016203.7 2005-04-07

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WO2006106146A1 true WO2006106146A1 (fr) 2006-10-12

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WO (1) WO2006106146A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10049971A1 (de) * 2000-10-06 2002-04-11 Wieland Edelmetalle Dentales Formteil und Verfahren zu dessen Herstellung
DE10115820A1 (de) * 2001-03-26 2002-10-17 Wieland Dental & Technik Gmbh Verfahren zur Herstellung vollkeramischer Dentalformteile
WO2004041113A1 (fr) * 2002-11-05 2004-05-21 Stefan Wolz Procede de fabrication par electrophorese d'elements dentaires entierement composes de ceramique, presentant une forme spatiale definie
EP1652491A1 (fr) * 2004-10-28 2006-05-03 BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG Procédé de fabrication d'un modèle dentaire ainsi qu'un élément de restauration, un modèle dentaire et l'utilisation d'une imprimante 3D et d'un kit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2705770B2 (de) * 1977-02-11 1980-03-06 Bego Bremer Goldschlaegerei Wilh. Herbst, 2800 Bremen Verfahren und Vorrichtung zum Aufbringen einer Grundmasse-Schicht auf einen metallischen Grundformling in der Dentaltechnik
US6059949A (en) * 1997-04-23 2000-05-09 Cerel (Ceramic Technologies) Ltd. Method of electrophoretic deposition of ceramic bodies for use in manufacturing dental appliances
DE10021437C2 (de) * 2000-05-03 2002-05-08 Stefan Wolz Verfahren zur Herstellung vollkeramischer Gerüste, insbesondere aus Alumina, in der Zahntechnik
DE10320936B4 (de) * 2003-05-09 2007-01-18 C. Hafner Gmbh + Co. Verfahren zur Herstellung keramischer Formkörper
DE10339603B4 (de) * 2003-08-28 2006-08-10 Stefan Wolz Verfahren zur Beschichtung dentaler Substrate mittels Elektrophorese

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10049971A1 (de) * 2000-10-06 2002-04-11 Wieland Edelmetalle Dentales Formteil und Verfahren zu dessen Herstellung
DE10115820A1 (de) * 2001-03-26 2002-10-17 Wieland Dental & Technik Gmbh Verfahren zur Herstellung vollkeramischer Dentalformteile
WO2004041113A1 (fr) * 2002-11-05 2004-05-21 Stefan Wolz Procede de fabrication par electrophorese d'elements dentaires entierement composes de ceramique, presentant une forme spatiale definie
EP1652491A1 (fr) * 2004-10-28 2006-05-03 BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG Procédé de fabrication d'un modèle dentaire ainsi qu'un élément de restauration, un modèle dentaire et l'utilisation d'une imprimante 3D et d'un kit

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DE102005016203A1 (de) 2006-10-12
DE102005016203B4 (de) 2010-04-08

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