EP1304976A2 - Corps moules pouvant etre explores par des systemes optiques - Google Patents

Corps moules pouvant etre explores par des systemes optiques

Info

Publication number
EP1304976A2
EP1304976A2 EP01971867A EP01971867A EP1304976A2 EP 1304976 A2 EP1304976 A2 EP 1304976A2 EP 01971867 A EP01971867 A EP 01971867A EP 01971867 A EP01971867 A EP 01971867A EP 1304976 A2 EP1304976 A2 EP 1304976A2
Authority
EP
European Patent Office
Prior art keywords
powder
cutlery according
cutlery
mass
pigment
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
EP01971867A
Other languages
German (de)
English (en)
Inventor
Jürgen Engelbrecht
Wolfram Ziegler
Andreas Sprafke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
R-dental Dentalerzeugnisse GmbH
S&C Polymer Silicon und Composite Spezialitaeten GmbH
Original Assignee
R-dental Dentalerzeugnisse GmbH
S&C Polymer Silicon und Composite Spezialitaeten GmbH
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 R-dental Dentalerzeugnisse GmbH, S&C Polymer Silicon und Composite Spezialitaeten GmbH filed Critical R-dental Dentalerzeugnisse GmbH
Publication of EP1304976A2 publication Critical patent/EP1304976A2/fr
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • A61K6/849—Preparations for artificial teeth, for filling teeth or for capping teeth comprising inorganic cements
    • A61K6/853—Silicates
    • 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
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/887—Compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • A61K6/889—Polycarboxylate cements; Glass ionomer cements
    • 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
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/891—Compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • A61K6/884—Preparations for artificial teeth, for filling teeth or for capping teeth comprising natural or synthetic resins
    • A61K6/891—Compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • A61K6/893—Polyurethanes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/90—Compositions for taking dental impressions
    • 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
    • A61C13/20—Methods or devices for soldering, casting, moulding or melting

Definitions

  • Molded parts that can be scanned by optical systems
  • the invention relates to a cutlery (kit of parts) that
  • a mass for the production of a shaped body b) a metal powder, a powder of a metal alloy, a powder of a pigment with a metallic effect or a powder with a layered structure, and c) optionally conventional additives.
  • the cutlery is suitable for optical recordings of morphologies and geometries of moldings with subsequent reproduction by CAD / CAM systems.
  • the invention particularly relates to cutlery for the creation of models or masses for impressions, in particular in the dental and medical field.
  • optical detection of morphologies and geometries of moldings with subsequent reproduction thereof by CAD / CA systems is known per se.
  • the optical behavior of the masses is not sufficient for photographic recording (e.g. with infrared or visible light) or for optical scanning (e.g. with laser beams) to provide sufficient information for the exact reproduction of all morphological details to reach.
  • optical scanning e.g. with laser beams
  • the object was achieved by a cutlery set for a) a composition for the production of a shaped body, b) a metal powder, a powder of a metal alloy, a powder of a pigment with a metallic effect or a powder with a layer structure, and c) if appropriate, conventional additives.
  • Shaped bodies produced with the cutlery can be photographically recorded and / or optically scanned by conventional optical systems and can be reproduced by CAD / CAM systems.
  • the cutlery according to the invention can be characterized in that components a) and b) are present as a mixture.
  • curable compositions according to the invention which are intended to lead to the desired shaped bodies to be duplicated, can vary widely depending on the intended use.
  • suitable starting masses are those which can form a body of a defined shape.
  • Masses are preferred which are suitable for the production of dental moldings. Such masses a) can also be present in the cutlery as components ai) ... a n ), preferably as components ai) and a 2 ), which are combined during the production of the moldings and reacted with one another. It can be z. B. are polymerizing, polyadditive or polycondensing systems.
  • customary materials can be used as the basis for the compositions according to the invention.
  • Such common materials are for example Gypsum, especially hard plaster, casting resins such.
  • Cements such as B. dental silicate or glass ionomer cements, unfilled or filled methacrylate systems such.
  • B. dental filling composites or provisional crown and bridge materials, ceramic mixtures, hard waxes or thermoplastics can serve as the basis for compositions according to the invention.
  • the above-mentioned starting materials are modified into products according to the invention by adding metal powders and / or powders of metal alloys and / or pigments with a metallic effect and / or powders with layer structures to the starting materials. Particularly good results are achieved if the additives are worked in intimately and homogeneously.
  • All powders of metals and metal alloys are suitable insofar as they are chemically compatible with the respective base materials. Examples are gold, silver, platinum, palladium, copper, titanium, alloys such as bronze or brass. Metals such as aluminum, magnesium and their alloys are particularly suitable because of their low density (possibly more favorable sedimentation behavior, cheaper price). It is important that these metals have a sufficiently fine grain size and a grain shape that is favorable for light reflection is present (eg in flattened form, platelets). The powders can also be advantageous in surface-coated form.
  • Suitable pigments with a metallic effect are those whose addition to a mixture can lead to a metallic appearance, but which are not themselves metals.
  • Pigments of this type are e.g. Pigments with reflective layer structures, e.g. coated or uncoated mica pigments.
  • Suitable powders with a layer structure are e.g. Graphite or molybdenum sulfide.
  • Preferred average grain sizes of these powders are those smaller than 100 ⁇ m. Particularly preferred average grain sizes are less than 20 ⁇ m. Those with average grain sizes of less than 5 ⁇ m are very particularly preferred.
  • Particularly preferred forms of the metal powder, powders of metal alloys, pigments with a metallic effect or powders with a layer structure are flake forms.
  • the metal powder, the powder of a metal alloy, the powder of a pigment with a metallic effect or powder with a layer structure e.g. more than 50% by weight, preferably more than 70% by weight and even more preferably more than 90% by weight, of lamellar structures.
  • components a) and b) can be used in a ratio of 99.8: 0.2% by weight to 60: 40% by weight, preferably in a ratio of 98: 2% by weight to 90: 10% by weight. -% present.
  • Reproduction is not only to be understood as a 1: 1-dimensional reproduction with respect to the optically measured shaped body, but also a shaped body that is reduced, enlarged, inverted (negative to positive or the like) by data transformation. The number of reproductions produced in this way is unlimited.
  • Components C can e.g. usual fillers, usual pigments or dyes, stabilizers, thixotropic, emulsifying, suspending or sedimentation-preventing additives.
  • usual fillers usual pigments or dyes, stabilizers, thixotropic, emulsifying, suspending or sedimentation-preventing additives.
  • the mass has a very low viscosity, it is advantageous to use additives which prevent sedimentation.
  • Shaped bodies which can be produced using cutlery are also provided according to the invention.
  • components a), b) and optionally c) are mixed with one another and the mixture is shaped, the mixture being e.g. can be molded into a mold.
  • Cutlery according to the invention can thus be used to produce shaped articles, in particular for producing shaped articles in Dental area, in particular for imaging tooth preparations.
  • the alginate impression is poured out of a beige addition-crosslinking model silicone ("Chairside In A Minute, Wash Material” from Roydent, USA) and the cavity is measured after hardening with the CEREC 3 SCAN.
  • the hard silicone model is suitable for creating an inlay in a direct method with composite filling material, but not for scanning the cavity and milling the appropriate inlay from a dental ceramic block using the CAD / CAM system CEREC 3 method to let.
  • Comparative example 1 is repeated. This time, before pouring out the cavity situation of the alginate impression Model silicone admixed with 2.0% titanium dioxide pigment.
  • the line image of the Cerec 3 scan image has been improved, but shows so many dropouts that the inlay cannot be produced.
  • Comparative example 1 is repeated again. But this time, before pouring out the cavitation situation of the alginate impression, 2.0% aluminum powder pigment is mixed into the model silicone, the pigment particles of which are approx. 10 ⁇ m in size and have a sheet-like structure. The measurement is carried out as in Examples 1 and 2 beforehand.
  • the line image of the Cerec 3 scan is very good, shows hardly any dropouts and if, then only very small, the image is very good, there are only slight overshoots on the edges, even steep flanks appear very good on both sides of the elongated cavity ,
  • Comparative example 1 is repeated again. Now, before pouring out the cavitation situation of the alginate impression, the addition-crosslinking model silicone 5.0% copper-zinc alloy powder is added, the pigment particles of which are approx. 8 ⁇ m in size. The measurement is carried out as in Examples 1 and 2 beforehand. The line image of the Cerec 3 scan is good, the image is significantly improved.
  • Example 2a
  • Comparative example 1 is repeated again. Now, before pouring out the cavitation situation of the alginate impression, 1.5% fine graphite powder • is added to the addition-curing model silicone. Measurements are made as in the previous examples. The line image of the CEREC 3 scan recording is very good, the line image is almost flawless and the steep hole flanks are represented by many dots.
  • the device reports that the optical properties are insufficient and does not continue to measure.
  • Parts are now formed from the same alginate, mixed with 5.0% coarser aluminum powder (25 ⁇ grain size) and again measured optically. Line images with only about 2% defects are obtained, the image is good.
  • the addition of metal powder to alginate remarkably improves the optical properties.
  • a white model plaster (Gilstone) is processed into a model and optically measured.
  • the Gilstone gypsum was mixed with 5.0% of mica coated with titanium dioxide (grain size less than 15 ⁇ ).
  • the line picture shows a little more dropouts than that of example 5, but the picture is good.

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Dental Preparations (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)

Abstract

L'invention concerne une trousse comprenant a) une matière pour produire un corps moulé; b) une poudre métallique, une poudre d'alliage métallique, une poudre de pigment à effet métallique ou une poudre à structure stratifiée et c) éventuellement des additifs classiques. Cette trousse peut s'utiliser pour produire des corps moulés, notamment dans le domaine dentaire, qui peuvent être particulièrement bien détectés par des systèmes optiques.
EP01971867A 2000-08-03 2001-08-03 Corps moules pouvant etre explores par des systemes optiques Ceased EP1304976A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10038564 2000-08-03
DE10038564A DE10038564A1 (de) 2000-08-03 2000-08-03 Durch optische Systeme abtastbare Formkörper
PCT/EP2001/009018 WO2002011678A2 (fr) 2000-08-03 2001-08-03 Corps moules pouvant etre explores par des systemes optiques

Publications (1)

Publication Number Publication Date
EP1304976A2 true EP1304976A2 (fr) 2003-05-02

Family

ID=7651646

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01971867A Ceased EP1304976A2 (fr) 2000-08-03 2001-08-03 Corps moules pouvant etre explores par des systemes optiques

Country Status (6)

Country Link
US (1) US7625442B2 (fr)
EP (1) EP1304976A2 (fr)
JP (1) JP2004505674A (fr)
AU (1) AU2001291734A1 (fr)
DE (1) DE10038564A1 (fr)
WO (1) WO2002011678A2 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7357887B2 (en) * 2004-04-08 2008-04-15 Hewlett-Packard Development Company, L.P. Identifiable structures and systems and methods for forming the same in a solid freeform fabrication system
EP1843702A1 (fr) * 2004-10-14 2007-10-17 Malcolm Grenness Composition optique amelioree pour des empreintes ou repliques de petits objets
DE102005006624A1 (de) * 2005-02-12 2006-08-24 Stefan Wolz Verfahren und Vorrichtung zur Herstellung vollkeramischer Zahnteile mit vorbestimmter Raumform mittels Elektrophorese
DE102005016728A1 (de) * 2005-04-11 2006-10-12 Dreve-Dentamid Gmbh Optimierte Silikonmaterialien für die digitale optische Datenerfassung und Weiterverarbeitung in der Medizintechnik,insbesondere im Dentalbereich
EP1806122B1 (fr) * 2006-01-05 2017-06-14 Coltène/Whaledent AG Matériau dentaire durcissable
ES2282037B1 (es) * 2006-03-08 2008-09-16 Juan Carlos Garcia Aparicio Procedimiento de fabricacion de protesis dentales removibles diseñadas digitalmente y sistema necesario para tal fin.
DE102006056451A1 (de) * 2006-11-28 2008-06-05 Kettenbach Gmbh & Co. Kg Verfahren zur Herstellung eines Dentalprodukts und scannbares Material
DE102007012298B4 (de) 2007-03-14 2009-05-14 Müller-Omicron GmbH & Co. KG Härtbare Dentalzusammensetzung zur Herstellung von Formkörpern und deren optische Erfassung
DE102007022036A1 (de) * 2007-05-08 2008-11-13 Sirona Dental Systems Gmbh Additiv zur Verbesserung der Aufnahmeeigenschaften für eine optische 3D-Vermessung, Dentalgips und Verfahren für die Herstellung eines Zahnmodells
DE102009006173A1 (de) 2009-01-26 2010-07-29 Ernst Mühlbauer Gmbh & Co. Kg Dentalmaterial
US10751262B2 (en) 2014-12-16 2020-08-25 3M Innovative Properties Company Cationically curing dental composition containing polymeric particles and use thereof
US11298210B2 (en) 2015-10-09 2022-04-12 John H. Khouri Orthodontic assembly
DE102020109280A1 (de) 2020-04-02 2021-10-07 Kulzer Gmbh Lichthärtende Zusammensetzung für die Herstellung dentaler Bauteile mit matten Oberflächen

Citations (1)

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Publication number Priority date Publication date Assignee Title
DE3638532A1 (de) * 1986-11-11 1988-05-19 Hafner C Gmbh & Co Elektrisch leitendes material zur herstellung von zahn-ersatzteilen

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US4219520A (en) * 1978-08-30 1980-08-26 Medical Evaluation Devices And Instruments Corp. Method of making thrombo-resistant non-thrombogenic objects formed from a uniform mixture of a particulate resin and colloidal graphite
DE3248357A1 (de) * 1982-12-28 1984-07-05 ESPE Fabrik pharmazeutischer Präparate GmbH, 8031 Seefeld Pulverfoermiger dentalwerkstoff, verfahren zu seiner herstellung und seine verwendung
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Also Published As

Publication number Publication date
WO2002011678A2 (fr) 2002-02-14
US7625442B2 (en) 2009-12-01
WO2002011678A3 (fr) 2002-04-18
DE10038564A1 (de) 2002-02-14
US20030162150A1 (en) 2003-08-28
AU2001291734A1 (en) 2002-02-18
JP2004505674A (ja) 2004-02-26

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