EP0828694A1 - Vitroceramiques micaciques translucides a resistance elevee - Google Patents

Vitroceramiques micaciques translucides a resistance elevee

Info

Publication number
EP0828694A1
EP0828694A1 EP97920506A EP97920506A EP0828694A1 EP 0828694 A1 EP0828694 A1 EP 0828694A1 EP 97920506 A EP97920506 A EP 97920506A EP 97920506 A EP97920506 A EP 97920506A EP 0828694 A1 EP0828694 A1 EP 0828694A1
Authority
EP
European Patent Office
Prior art keywords
weight
glass ceramic
glass
mica
melted
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.)
Withdrawn
Application number
EP97920506A
Other languages
German (de)
English (en)
Inventor
Michael Reise
Gerd Müller
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.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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 Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV filed Critical Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Publication of EP0828694A1 publication Critical patent/EP0828694A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/16—Halogen containing crystalline phase
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/15—Compositions characterised by their physical properties
    • A61K6/16—Refractive index
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/70—Preparations for dentistry comprising inorganic additives
    • A61K6/78—Pigments
    • 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
    • A61K6/807—Preparations for artificial teeth, for filling teeth or for capping teeth comprising ceramics comprising magnesium 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
    • A61K6/818—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
    • A61K6/831—Preparations for artificial teeth, for filling teeth or for capping teeth comprising non-metallic elements or compounds thereof, e.g. carbon
    • A61K6/833—Glass-ceramic composites

Definitions

  • the present invention relates to mica glass ceramics which, because of their mechanical properties, are suitable for a wide range of applications, and to dentures as an example thereof.
  • Mica glass ceramics are generally known for the possibility of machining them with machining processes.
  • the machinability is made possible by the tabular morphology and the good cleavage of the mica.
  • the mica crystals in glass ceramics show a wide range of compositions.
  • the interlayer position in the mica structure can with
  • mica glass ceramics enable applications in electronics (high specific resistance, low dielectric constant) and in vacuum technology (freedom from pores). Due to the biocompatible behavior of the mica glass ceramic, it is also used in medicine as a material for bone replacement. In many cases, however, the use of mica glass ceramic is hampered by the comparatively low strength of the material. Improved strength combined with good machinability, at least in the desired phases of the manufacturing process, would significantly expand the field of application of the mica glass ceramic.
  • the corresponding glass ceramic can be used as a prefabricated block in standard CAD-CAM processes in order to manufacture inlays or onlays.
  • Na 2 0 0-9% by weight with the proviso that Na 2 0 and K 2 0 together are at least approximately
  • F 2-10% by weight, which is essentially free of lithium, calcium, strontium and barium.
  • the proportion of F ⁇ is preferably 4-10% by weight.
  • “Substantially free” is intended to mean that the elements mentioned should at most be present in those proportions which are caused by the introduction of contaminants, typically in total less than 1% by weight, preferably less than 0.5% by weight.
  • the proportion of lithium should preferably be below 0.1% by weight, since, due to the small molecular weight of Li, an amount of, for example, 1% by weight of Li 2 0 already has a significant influence on the properties of the glass ceramic, in particular its hydrolytic resistance.
  • Components for coloring, fluorescence or for improving the processing properties of the glass can also be added, e.g. B.: Ce0 2 , La 2 0 3 , Mn0 2 , Fe 2 0 3 , Ti0 2 , Y 2 0 3 and B 2 0 3 in amounts up to about 5% of each component, together not more than about 10%.
  • Raw materials (oxides, fluorides, carbonates, etc.) are manufactured.
  • the batches are at 1300-1600 ° C, preferably 1400-1550 ° C for e.g. Melted in a covered crucible for 1-5 hours with stirring, poured into appropriate molds and then cooled to room temperature.
  • the subsequent transfer of the glass into a glass ceramic is carried out by continuously heating the glasses to the crystallization temperature or by heating to a temperature for nucleation and then increasing the temperature to crystallize the glasses.
  • the nucleation temperature is about 20-200 K above the transformation temperature, the time for nucleation is about 0.5-3 hours.
  • the crystallization temperature is about 200-450 K above the transformation temperature and the crystallization time is about 0.5-5 hours.
  • the strength of the glass ceramic is essentially ensured by the fine-grained mica and the conversion gain by tetragonal Zr0 2 .
  • Tetragonal Zr0 2 can be martensitically converted into the monoclinic modification. This conversion is associated with a 3-5 percent increase in volume. This puts pressure on the tip of an incoming crack and increases the strength of the material.
  • Other strengthening mechanisms of Zr0 2 are the microcrack reinforcement by the microcrack formation on spontaneously converted Zr0 2 grains and the consolidation by surface compressive stresses, which can be generated by the conversion of the near-surface tetragonal Zr0 2 into the monoclinic modification (e.g. by grinding) .
  • usable increases in strength can preferably be achieved by the presence of tetragonal ZrO 2 crystallites in the size range from about 20 to about 200 nm.
  • the mica glass ceramics according to the invention can be processed in various ways.
  • glasses to the compositions melt and pour it into a suitable mold (in the dental field, e.g. tooth crown or bridge) and then crystallize it to the glass ceramic.
  • the glass ceramic according to the invention is not only suitable for inlays and onlays like the materials of EP 0 083 828 B1; It can also be used, for example, for other dentures (crowns and bridges) because, in addition to being machinable, for example with CAD-CAM devices, it also has high mechanical strength and, with the help of suitable additives, also translucency and coloring that correspond to the enamel can have. It also has the chemical resistance required for use as a denture.
  • the new mica glass ceramics are given.
  • the compositions are given as a sample.
  • the analyzed compositions of some glasses are also given.
  • the strengths described were determined in a 4-point bending test (40 mm lower, 20 mm upper support spacing) on 3 ⁇ 4 ⁇ > 45 mm 3 large samples.
  • the workability of the samples means that they can be sawn even with the help of a commercially available hardened steel saw blade.
  • the translucency was determined qualitatively on 3 mm thick samples. "Good” here means that a black line on a white background can still be seen through a glass ceramic plate.
  • composition (% by weight)
  • composition (% by weight)

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Plastic & Reconstructive Surgery (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Glass Compositions (AREA)
  • Dental Preparations (AREA)

Abstract

L'invention concerne une vitrocéramique avec des cristaux de mica et ZrO2, qui contient: K2O 0-9 % en poids, Na2O 0-9 % en poids, à condition que Na2O et K2O représentent ensemble 4 % en poids environ, SiO2 35-60 % en poids, MgO 10-25 % en poids, Al2O3 7-30 % en poids, ZrO2 4-12 % en poids, F- 2-10 % en poids. Ladite céramique est sensiblement dépourvue de lithium, de calcium, de strontium et de baryum. L'invention concerne également le procédé de fabrication de cette céramique et son utilisation comme prothèse dentaire.
EP97920506A 1996-03-15 1997-03-13 Vitroceramiques micaciques translucides a resistance elevee Withdrawn EP0828694A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19610300A DE19610300C2 (de) 1996-03-15 1996-03-15 Hochfeste transluzente Glimmer-Glaskeramiken, Verfahren zu ihrer Herstellung und Verwendung
DE19610300 1996-03-15
PCT/DE1997/000504 WO1997034847A1 (fr) 1996-03-15 1997-03-13 Vitroceramiques micaciques translucides a resistance elevee

Publications (1)

Publication Number Publication Date
EP0828694A1 true EP0828694A1 (fr) 1998-03-18

Family

ID=7788447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97920506A Withdrawn EP0828694A1 (fr) 1996-03-15 1997-03-13 Vitroceramiques micaciques translucides a resistance elevee

Country Status (5)

Country Link
US (1) US6080692A (fr)
EP (1) EP0828694A1 (fr)
JP (1) JP2000500730A (fr)
DE (1) DE19610300C2 (fr)
WO (1) WO1997034847A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040241614A1 (en) * 1998-04-13 2004-12-02 Goldberg A. Jon Prefabricated components for dental appliances
US8814567B2 (en) 2005-05-26 2014-08-26 Zimmer Dental, Inc. Dental implant prosthetic device with improved osseointegration and esthetic features
JP5438967B2 (ja) 2005-08-30 2014-03-12 ジマー デンタル， インコーポレイテッド 改良されたオッセオインテグレーションの特徴を有する歯科用インプラント
US8562346B2 (en) 2005-08-30 2013-10-22 Zimmer Dental, Inc. Dental implant for a jaw with reduced bone volume and improved osseointegration features
JP4582028B2 (ja) * 2006-03-13 2010-11-17 石川県 快削性ガラスセラミックスの製造方法
US9149345B2 (en) 2007-08-30 2015-10-06 Zimmer Dental, Inc. Multiple root implant
US8899982B2 (en) 2008-07-02 2014-12-02 Zimmer Dental, Inc. Implant with structure for securing a porous portion
US9095396B2 (en) 2008-07-02 2015-08-04 Zimmer Dental, Inc. Porous implant with non-porous threads
US8562348B2 (en) 2008-07-02 2013-10-22 Zimmer Dental, Inc. Modular implant with secured porous portion
US8231387B2 (en) 2008-07-02 2012-07-31 Zimmer, Inc. Porous implant with non-porous threads
US20100114314A1 (en) 2008-11-06 2010-05-06 Matthew Lomicka Expandable bone implant
US9707058B2 (en) 2009-07-10 2017-07-18 Zimmer Dental, Inc. Patient-specific implants with improved osseointegration
US8602782B2 (en) 2009-11-24 2013-12-10 Zimmer Dental, Inc. Porous implant device with improved core
JP6009995B2 (ja) * 2013-06-18 2016-10-19 株式会社ノリタケカンパニーリミテド ガラスセラミック材料及びその製造方法、並びに歯科用補綴物
CN112020483A (zh) * 2019-04-02 2020-12-01 康宁股份有限公司 可化学强化的可机械加工玻璃陶瓷

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE19050T1 (de) * 1982-01-11 1986-04-15 Corning Glass Works Fleckbestaendige glimmer-zusammensetzungen und daraus hergestellte gegenstaende, insbesondere zahnersatzteile.
US4652312A (en) * 1985-11-04 1987-03-24 Corning Glass Works Glass-ceramic compositions for dental constructs
DE3730637C2 (de) * 1986-09-12 1993-11-25 Sumikin Photon Ceramics K K Verfahren zum Herstellen einer Glaskeramik
JPH0345534A (ja) * 1989-07-12 1991-02-27 Osaka Cement Co Ltd 結晶化ガラスの製造方法
US5043353A (en) * 1989-10-10 1991-08-27 Eli Lilly And Company A80789 polyether antibiotic
JPH05306141A (ja) * 1991-03-07 1993-11-19 Hoya Corp ガラスセラミックス及びそれを用いた人工歯冠
JP2828816B2 (ja) * 1991-12-27 1998-11-25 ホーヤ株式会社 ガラスセラミックスおよびその製造方法
DE4404921C2 (de) * 1994-02-16 1996-08-14 Fraunhofer Ges Forschung Verwendung einer ZrO¶2¶-haltigen Glimmerglaskeramik für Zahnkronen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9734847A1 *

Also Published As

Publication number Publication date
US6080692A (en) 2000-06-27
DE19610300C2 (de) 1998-07-02
JP2000500730A (ja) 2000-01-25
WO1997034847A1 (fr) 1997-09-25
DE19610300A1 (de) 1997-09-18

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Legal Events

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RTI1 Title (correction)

Free format text: USE OF HIGH-STRENGTH, TRANSLUCENT MICA GLASS-CERAMICS AS DENTAL REPLACEMENT

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Effective date: 20021220