WO2007028787A1 - Prothese dentaire ceramique et son procede de production - Google Patents

Prothese dentaire ceramique et son procede de production Download PDF

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Publication number
WO2007028787A1
WO2007028787A1 PCT/EP2006/065992 EP2006065992W WO2007028787A1 WO 2007028787 A1 WO2007028787 A1 WO 2007028787A1 EP 2006065992 W EP2006065992 W EP 2006065992W WO 2007028787 A1 WO2007028787 A1 WO 2007028787A1
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WO
WIPO (PCT)
Prior art keywords
ceramic
glass
framework structure
silicate
inner framework
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PCT/EP2006/065992
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German (de)
English (en)
Inventor
Marcel Schweiger
Harald Bürke
Peter Burtscher
Volker Rheinberger
Josef Schweiger
Marlies Eichberger
Florian Beuer
Original Assignee
Ivoclar Vivadent Ag
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Priority claimed from DE102005042091A external-priority patent/DE102005042091A1/de
Application filed by Ivoclar Vivadent Ag filed Critical Ivoclar Vivadent Ag
Publication of WO2007028787A1 publication Critical patent/WO2007028787A1/fr

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    • 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
    • A61C13/0004—Computer-assisted sizing or machining of dental prostheses
    • 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
    • A61C13/08—Artificial teeth; Making same
    • A61C13/083—Porcelain or ceramic teeth
    • 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
    • A61C13/08—Artificial teeth; Making same
    • A61C13/087—Artificial resin teeth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00—Filling or capping teeth
    • A61C5/70—Tooth crowns; Making thereof
    • A61C5/73—Composite crowns
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C5/00—Filling or capping teeth
    • A61C5/70—Tooth crowns; Making thereof
    • A61C5/77—Methods or devices for making crowns
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/30—Compositions for temporarily or permanently fixing teeth or palates, e.g. primers for dental adhesives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/60—Preparations for dentistry comprising organic or organo-metallic additives
    • A61K6/62—Photochemical radical initiators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K6/00—Preparations for dentistry
    • A61K6/60—Preparations for dentistry comprising organic or organo-metallic additives
    • A61K6/64—Thermal radical initiators
    • 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
    • A61K6/802—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
    • 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
    • A61K6/827—Leucite
    • 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
    • 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
    • A61K6/836—Glass
    • 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
    • A61K6/838—Phosphorus compounds, e.g. apatite
    • 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
    • A61K6/84—Preparations for artificial teeth, for filling teeth or for capping teeth comprising metals or alloys
    • A61K6/844—Noble metals
    • 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
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/08—Artificial teeth; Making same
    • A61C13/083—Porcelain or ceramic teeth
    • A61C13/0835—Ceramic coating on metallic body
    • 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
    • A61C13/08—Artificial teeth; Making same
    • A61C13/09—Composite teeth, e.g. front and back section; Multilayer teeth

Definitions

  • the invention relates to dental prostheses, in particular composite crowns or composite bridges, consisting of two independent components, which are manufactured independently of one another or coordinated with each other and are interconnected by a Konnektormasse, and to a process for its preparation.
  • Ceramic dental prostheses made of metal-ceramic are currently produced in 2 different processing techniques:
  • feldspar ceramics on a metal framework (eg Vita VMK® 68 / Degudent)
  • a metal framework is first produced by casting in the Lost-Wax process.
  • the framework is modeled in wax, embedded in a casting mold and finally cast.
  • the cast object must then be fitted on the artificial tooth stump.
  • feldspar ceramic is applied to a metal framework and fired in several steps to the final shape.
  • feldspar ceramics are applied to a refractory stump and fired in several steps to the final shape. After the last firing, the refractory stump is removed using a blasting process. 2. Production of a fully anatomical crown / bridge by pressing (eg IPS Empress®, IPS e.max® Press).
  • the crown or bridge is fully anatomically modeled in wax and then converted in the lost-wax process by means of pressing technique in glass ceramic. By subsequent painting and glazing, the crown is completed.
  • Electrophoretic method eg Wolceram®
  • a scaffold of oxidic ceramic (eg AI2O3) is deposited on a stump model by means of electrophoresis in defined strength. The further steps correspond to point 4.
  • Wax process eg Cercon® Ceram Express from Degudent or IPS e.max® ZirPress from Ivoclar
  • a framework structure of ZrCh is produced by CAD / CAM or copy milling. Subsequently, this framework is grown to fully anatomical shape and over-pressed in the lost-wax process with a special, on ZrO ⁇ tuned press ceramic. The crown or bridge can then be completed either by further layering of cutting / transpamasse or by painting technique.
  • Prefabricated elements for the production of dental prostheses are known from DE 103 48 369 and from DE 103 48 370. These prefabricated elements are made on the substructure with the help of a connecting material (preferably plastic) applied and aligned by the technician in the articulator and then fixed by supplying energy. Since this alignment requires a certain mobility of the superstructure on the substructure, a certain margin is required between substructure and superstructure. An adjustment in the articulator by the technician is necessary because it is prefabricated elements that are not individually made for the individual patient. This has the disadvantage that the dental technician has to invest working hours in the alignment of such elements. Furthermore, the substructure has a uniform layer thickness, with the result that the superstructure has no uniform layer thickness. The result is tensions in the superstructure, especially when using ceramic materials for the superstructure, which can lead to cracks and fractures of this superstructure. In addition, the elements mentioned are applicable only in the premolar and molar area.
  • the document DE 199 44 130 A1 describes a method for the automatic production of dental prostheses using a standardized block of material.
  • an existing scaffolding which is produced by milling, provided with a veneer, which is made of a block, is fitted on the framework of ceramic, plastic or metal and on the framework adhesive, by sintering or by diffusion processes is attached.
  • a ceramic connector mass is not mentioned.
  • a glass powder is fired as a glass intermediate layer.
  • the object of the present invention was therefore dentures, in particular composite crowns or composite bridges, consisting of at least two independent components, which no longer have the disadvantages of the cited prior art, as well as to provide methods for its production.
  • a particular aspect of the task according to the invention was to produce ceramic dental prostheses, in particular ceramic composite crowns and composite bridges, anatomically shaped by means of CAD / CAM methods for each individual patient and to specify a method for the production thereof, and the composite crowns and composite bridges thereby have strength values which are well above that previously produced in the CAD / CAM method, anatomically shaped, glass-ceramic prosthesis and at the same time have the aesthetic advantages of glass-ceramic dentures.
  • room temperature means a temperature of 20 ° C + 2 ° C.
  • composite means physical and / or chemical mixtures or compounds of polymers, copolymers or mixtures of polymers or copolymers with at least 10% by weight of one or more inorganic substances may be preferred, pigments, fillers and / or glass fibers of various inorganic substances, and/ or glass fibers of various
  • connective mass means a solid and / or liquid mass which connects two independent components with one another.
  • veneer or veneer are used synonymously in the context of the present invention.
  • CAD and CAM are understood within the scope of this invention, as used e.g. in Römpp Chemie Lexikon, 9th edition, Bandi, 1989, pages 541 and 565 are shown.
  • CAD / CAM is known in the field of motor technology, further or more precise embodiments are well known to the person skilled in the art
  • the dental prosthesis according to the present invention is produced from at least two individual components, preferably by a computer-aided method, particularly preferably by a CAD / CAM method.
  • the at least two individual components are connected to one another in a joining step, preferably by means of a connector mass.
  • the inner framework structure preferably consists of
  • (I) metal preferably titanium or gold, particularly preferably titanium or
  • (II) dental alloy in particular a non-noble metal alloy (NEM alloy) and / or a noble metal alloy (EM alloy) or
  • (III) oxide ceramic in particular Al 2 O 3, with Y 2 O 3, CeO 2, CaO and / or MgO stabilized tetragonal ZrO 2 and / or a mixture of Al 2 O 3 and stabilized ZrO 2 ceramic or glass-infiltrated oxide ceramic or
  • (IV) glass ceramic in particular lithium disilicate, feldspar, leucite, SiIi katkeramik and / or apatite or a mixture of two or more of these components.
  • the inner framework structure consists of a metal framework and / or of a high-strength framework ceramic, in particular of a metal framework and / or an oxide ceramic. Most preferred is a ZrO2 framework.
  • the outer veneer or veneer is preferably made
  • (A) glass ceramic in particular lithium disilicate, feldspar, leucite, silicate ceramic and / or apatite-containing ceramic or
  • (C) plastic in particular acrylic and / or filled composite or a mixture of two or more of these components.
  • the outer veneer is made of a silicate
  • Veneering ceramic material in particular feldspar, leucite, silicate ceramic, apatite and / or silicate glass ground. Most preferred is a lithium disilicate glass-ceramic.
  • the composite of framework and veneering is preferably carried out by means of a
  • Connector mass consisting preferably made
  • low melting means that glass or glass ceramic (i) a
  • the connector mass is liquid at room temperature or at least viscous or by a slight supply of heat, i. at most 50 ° C, to liquefy. This simplifies the processing.
  • Deformation temperature of the veneering ceramic in the minimum 50 ° C amount is not only applies to two different ceramics, not points ii and iii. For ii and iii, there is no effective melting, just a change in consistency
  • a sinterable material is preferably used as Konnektormasse.
  • sintering means a process which proceeds under certain temperature, pressure and atmospheric conditions and which brings about the transition of a collection of independent grains into a dense, mechanically strong structure whose properties correspond to those of a continuous phase.
  • connector compounds are used which can be sintered under normal pressure.
  • Konnektormasse be used which at normal pressure has a sintering temperature very close to the deformation temperature of the burn-stable lithium disilicate veneer.
  • the temperature difference should preferably be greater than 50 ° C.
  • the connector material is very particularly preferred for the connector material to crystallize during the sintering process, ie the sintering temperature is oriented at the temperature of the crystallization of the connector glass and the formation of a glass ceramic. As a result, an increase in the mechanical strength of the connector glass can be achieved, for. B.
  • Konnektormassen whose crystallization temperatures correspond to those of lithium disilicate.
  • systems which are particularly preferred according to the invention are, on the one hand, the lithium silicate systems already mentioned above which are preferably used as the veneering material and, on the other hand, the ZrO 2 -containing glasses and glass ceramics which are preferably used as the framework material. Both systems show crystallization at a temperature around 850 ° C. This also corresponds to the crystallization transformation temperature of the metasilicate or the crystallization temperature of lithium disilicate.
  • the sintering can additionally be improved by exerting a pressure on the connector mass during the sintering process itself. However, this must be done so that the pressure z. B. is generated by a weight that acts exactly in the "insertion direction" of scaffolding and veneer and a
  • glass-ceramics as inner framework structures are only released for certain indications.
  • bridge scaffolds that can be used in the frontal area, as well as single-tooth restorations.
  • Titanium, silver and gold are preferably used, the use of titanium being particularly preferred.
  • (III) Oxide Ceramics The material used for this purpose is aluminum oxide (Al 2 O 3, eg Procera) and yttria-stabilized zirconia Y-TZP, especially 3 mol% Y 2 O 3 stabilized ZrO 2 3Y-TZP (eg Ivoclar IPS e.max® ZirCAD, KaVo Everest® ZS, Degudent Cercon®, 3M ESPE Lava® or Vita Inceram® YZ).
  • Al 2 O 3 eg Procera
  • yttria-stabilized zirconia Y-TZP especially 3 mol% Y 2 O 3 stabilized ZrO 2 3Y-TZP (eg Ivoclar IPS e.max® ZirCAD, KaVo Everest® ZS, Degudent Cercon®, 3M ESPE Lava® or Vita Inceram® YZ).
  • Lithium disilicate, feldspar, leucite, silicate ceramics and / or apatite eg lithium disilicate IPS e.max® CAD and Press
  • feldspar ceramics eg IPS InLine®, IPS Classic, Vita Omega® 900, Vita® VM 13, Vita Mark ® Il Blocs, Wieland Reflex®, Degudent Duceragold®, Degudent Duceram® Kiss
  • leucite eg IPS Empress® Esthetic, IPS Empress® CAD
  • fluorapatite glass-ceramic eg Ivoclar IPS d ' Sign®, IPS e. max® Ceram, IPS e.max® ZirPress
  • solid glass ceramics of the lithium disilicate type such as IPS e.max® CAD and Press.
  • silicate glasses and / or glass ceramics with adapted sintering temperature and thermal expansion coefficient can be used, such as IPS e.max® glaze, IPS e.max® Ceram, IPS d.SIGN®, IPS Empress® Esthetic Veneer. It is also possible to use mixtures of silicate glasses and glass ceramics.
  • Variolink® Veneer Light-curing cements
  • Variolink® II dual-curing cements
  • All cements have in common that they contain 15-50% methacrylate monomer and 50-85% filler. Since the curing of the cement takes place extraorally, a hot-curing cement is also suitable in which the light-curing initiator system is replaced by a thermosetting initiator.
  • Silicate ceramic surfaces are treated with a silane primer (Monobond®S) to ensure an optimal bond between ceramic and adhesive cement.
  • a silane primer (Monobond®S)
  • metal or zirconium a metal / zirconia primer is conceivable.
  • unfilled bonding (Heliobond®) is possible for very narrow joints ( ⁇ 20 ⁇ m).
  • feldspar ceramic eg IPS InLine®, IPS Classic, Vita Omega® 900, Vita VM ® 13, Vita Mark® II Blocs, Wieland Reflex®, Degudent Duceragold®, Degu
  • Milling blocks from the material group (A) can be used for the veneering of metal frameworks.
  • Milling blocks from material group (A) can be used for the veneering of frameworks made of high-performance oxide ceramics. Preference is given to existing CAD / CAM blocks of the following silicate ceramic compositions: Ivoclar IPS e.max® CAD, Ivoclar IPS e.max® ZirPress, Ivoclar IPS e.max® Press, Ivoclar Empress® E2, Ivoclar ProCAD®, Vita Mark® II, Vita Triluxe®.
  • the dental glass ceramic may contain SiO 2, Al 2 O 3 and P 2 O 5 as main components.
  • main crystal phases of leucite, apatite and / or lithium disilicate it is also possible for further secondary crystal phases to be present in the dental glass ceramic.
  • secondary crystal phases starting from the composition of the starting glasses, such as lithium phosphate or monazite or xenotime into consideration.
  • the mixed crystal ceramics described are also compatible with other dental glass ceramics, e.g. Leucite dental glass ceramics or leucite apatite dental glass ceramics.
  • further applications of the dental glass ceramic according to the invention open up for the production of sintered glass ceramics with leucite and / or leucite-apatite glass-ceramic systems.
  • the further glasses are preferably selected from the group of opal glasses, alkali silicate glasses and / or low-temperature sintering potassium-zinc-silicate glasses and the other glass ceramics, preferably selected from the group of the deep-sintered apatite glass ceramics, the translucent apatite glass ceramics, the sinterable lithium silicate ceramics , the ZrO 2 -SiO 2 glass-ceramics and / or the leucite-containing phosphosilicate glass ceramics.
  • the xenotime-type glass-ceramics can be mixed with other glasses and / or glass-ceramics. In this case, the xenotime glass-ceramic forms the main component in, for example, an inorganic composite.
  • the glass-ceramics can be combined with a variety of other glass-ceramics to achieve the adjustment of certain optical, mechanical or thermal properties.
  • Examples of such glasses or glass ceramics can be found, for example, in DE 43 14 817 A1, DE 44 23 793 A1, DE 44 23 794 A1, DE 44 28 839 A1, DE 196 47 739 A1, DE 197 25 552 A1 and DE 100 31 431.A1
  • Such glasses and glass-ceramics are preferably derived from silicates, borates or phosphates or aluminate-silicate systems.
  • Preferred glass ceramics are derived from the following material systems: SiO 2 -Al 2 O 3 -K 2 O with cubic or tetragonal leucite crystals, SiO 2 -B 2 O 3 -Na 2 O, alkali silicates, alkali-zinc silicates, silico-phosphate systems and / or the SiO 2 -ZrO 2 G system.
  • the thermal expansion coefficient of the resulting mixed glass ceramics in a range of 7 to 20 * 10 ⁇ 6 K " 1 , measured in the range of 100 to 400 0 C can be adjusted.
  • the dental glass ceramic may contain one or more coloring or fluorescent metal oxides.
  • Acrylic blocks can be used. These are preferably made of preferably non-crosslinked polymethyl methacrylate (PMMA).
  • PMMA polymethyl methacrylate
  • Composite materials which can be used according to the invention are preferably composed of polymerized (and usually crosslinked) monomers which contain both inorganic and organic particulate or fibrous fillers.
  • the material group (C) can be used both as a short-term but also as a long-term temporary, since plastic materials in terms of appearance but also in terms of strength and Plaquestromrung the ceramic materials
  • Glass ceramic or ceramic are inferior. For a lasting supply Accordingly, such combinations are less preferred in the context of the present invention.
  • the substrate that is to say the inner framework structure
  • the adhesive cements are suitable because they can bring into the dental restoration by the fillers covering and / or fluorescent properties.
  • the dental prosthesis according to the invention is preferably divided into two separate steps, which are both carried out in a preferred embodiment by means of a computer-aided method, in particular by CAD / CAM method and both components by means of a Konnektormasse, preferably that described above Konnektormasse, Lovehegt, preferably by a sintering fire.
  • the invention is applicable both in the anterior region and in the posterior region.
  • the invention is intended both for ground tooth stumps and for implant abutments.
  • a framework in anatomically reduced form is preferably produced by means of a computer-assisted method, in particular by means of CAD / CAM technology.
  • the inner framework structure consists of metal or of a dental alloy, however, this component can also be produced in an alternative embodiment by means of a casting process, preferably by centrifugal casting.
  • the inner framework structure consists of glass ceramic (IV)
  • the inner framework structure can also be produced by hot pressing.
  • the pressing technique for the processing of glass-ceramics is a common method for many years, which generates the necessary cavities using the lost wax technique, in which then the ceramic is pressed under pressure and elevated temperatures.
  • the inner skeleton structure may be milled from a metal blank consisting of the metal (I) or the dental alloy (II). It is likewise possible to mill or grind the inner framework structure from an oxide-ceramic blank. Milling or grinding can be done in green, flake or hipped condition.
  • the framework In the edge area, the framework can be extended to the preparation margin, as well as a shortened framework is possible with a correspondingly wide groove.
  • the connectors must also meet this requirement, with a rounded design on the connector bottom to eliminate stress spikes from edges.
  • the connectors and bridge members may be designed with both a fillet and a fillet to fit the veneer to be fitted later, the fluted construction resulting in higher overall strengths of the all-ceramic composite bridges.
  • the frameworks of crowns and bridges are anatomically reduced Design, that is, the frameworks have a three-dimensional geometry, which is reduced by the wall thickness of the veneer against the fully anatomical outer shape of the restoration.
  • a glass-ceramic shoulder can be formed by the outer veneer envelope.
  • the inner framework structure is manufactured in a hocker-supporting, anatomically reduced form.
  • the framework on the side facing the tongue (lingual) and on the side facing the cheek (buccal) preferably have a groove which forms the termination for the glass-ceramic veneer in this area ,
  • the framework on the side facing the tongue (lingual) and on the side facing the cheek (buccal) preferably has a groove, which forms the conclusion for the glass-ceramic veneer in this area ,
  • the inner contour of the veneer corresponds to the outer contour of the metal framework, wherein for the joining of the two components, a joint gap on the inside of the veneer may be present, but also a gapless fit is also possible.
  • the outer shape of the veneer corresponds to the shape of the fully anatomical crown. If the outer veneer sheath is produced from a glass-ceramic block by means of CAD / CAM methods, it is also possible for large inner framework structures to produce the outer veneer in several parts. This is particularly advantageous when large (long-span) restorations must be produced and not sufficiently large glass ceramic blanks are available. It is inventively preferred if the outer veneer is made in a computer-aided process, in particular a CAD / CAM process, tailored to the outer shape of the inner framework structure or tuned.
  • the joining of the two parts takes place by means of a connector ground, preferably by the connector ground described above.
  • This is preferably a lower-melting connector compound.
  • This Konnektormasse is given in a thin-flowing consistency on the inner surface of the veneer and then placed on the framework structure with a slight pressure. This step is done on the stumps of the master model. Then the assembled parts are lifted off, the excess of the connector mass is removed and then the restoration is burned in the conventional ceramic oven (eg Ivoclar P300, Ivoclar P500, Vita Vacumat® 40, Dekema Austromat® 3001) and the occlusion is then ground in after sintering together and the restoration completed in a glaze firing.
  • the conventional ceramic oven eg Ivoclar P300, Ivoclar P500, Vita Vacumat® 40, Dekema Austromat® 3001
  • a second possibility for joining scaffolds made of oxidic high-performance ceramics as an inner framework structure and outer veneer shell is that the CAD / CAM block of silicate ceramic composition for the outer veneer shell is not completely crystallized. During the crystallization, the structure of the ceramic is rebuilt, so form, for example, acicular lithium disilicates. This causes the volume to decrease by a minimal percentage in the crystallization process (eg, IPS e.max® CAD blanks shrink by approximately 0.5% in the crystallization process).
  • the construction of the outer veneer in this case must be such that the veneer made in the pre-crystallized stage fits snugly on the framework.
  • the bonding of the outer veneer shell to the inner framework structure by means of the bonding compound takes place together with a crystallization firing of the outer veneer shell in a single sintering process in the ceramic furnace.
  • Another type of attachment of dental restorations on tooth stumps is the cementation, for example, adhesive cements (ii) can be used based on polymerizable monomers.
  • adhesive cements (ii) can be used based on polymerizable monomers.
  • the bonding systems of a primer and an adhesive wherein the primer of the adhesion mediation of at least one system (tooth stump, restoration or restoration part) with the other is used.
  • Specific examples of the pretreatment of the individual parts are:
  • Sandblasting and metal primer Metal / Zirconia Primer, Ivoclar Vivadent AG
  • Silicate (Rocatec®, 3M ESPE) and silanize
  • the connector mass can be preferred, in particular as a low-melting, thin-flowing ceramic composition, a) opaque properties, b) have translucent and transparent properties.
  • the Konnektormasse For the joining of metal framework with veneer the Konnektormasse must have an opaque color, in order to avoid a shine through the metal framework.
  • the connector mass For joining scaffolds made of oxidic high-performance ceramics with the veneer, the connector mass should have translucent and transparent properties in order to ensure the good optical properties of all-ceramic restorations. This can be achieved, for example, with IPS e.max Ceram or IPS e.max Zirliner from Ivoclar.
  • the layer thickness of the connector mass is according to the invention in the range between 0.005 and 0.2 mm, preferably between 0.01 and 0.1 mm.
  • the outer veneer is produced in a computer-aided process, in particular a CAD / CAM process, from a silicate ceramic, which is present in a pre-crystallized stage and which shrinks by a defined value in a subsequent crystallization process.
  • a Konnektormasse of a lower melting, low-viscosity ceramic composition is used, which connects the inner framework structure and the outer veneer in a sintering process in the ceramic furnace together.
  • both the inner framework structure and the outer veneer shell are each manufactured from one piece by means of CAD / CAM methods.
  • FIG. 4 cross section through ceramic composite bridge in the region of FIG. 4
  • FIG. 6 cross-section through ceramic composite crown in the posterior region with hock-supporting, anatomically reduced framework geometry
  • FIGS. 1 and 2 show a ceramic composite crown consisting of a framework 1 produced in the CAD / CAM process and a glass-ceramic veneer 3 produced in the CAD / CAM process, which are sintered together in the ceramic furnace by a low-melting connector compound 2.
  • the layer thickness d of the connector mass 2 should be between 0.01 and 0.1 mm.
  • FIGS. 3, 4 and 5 show a composite ceramic bridge which likewise comprises a framework 1 produced in the CAD / CAM process and a glass-ceramic veneer 3 produced in the CAD / CAM process, which are sintered in a conventional sintering firing process by the bonding compound 2 dental technical ceramic furnace are interconnected.
  • the framework 1 forms on the side facing the tongue (lingual) and on the side facing the cheek (buccally) a groove 8 which forms the termination for the glass-ceramic veneer in this area
  • the bridge framework also forms a lingual lingual and buccal border in the area of the pontic 7, as well as a border for the alveolar ridge (basal) 9 also bounded by the framework material which rests here against the ridge 1 0 basic veneer.
  • the anatomically reduced geometry of the framework structure 1 produced in the CAD / CAM method is recognizable, so that the glass-ceramic veneer 3 produced in the CAD / CAM method has a uniform layer thickness having.
  • This hump-assisting framework geometry 11 causes an increase in the strength of the veneer 3.

Landscapes

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

Abstract

L'invention concerne une prothèse dentaire, notamment une couronne composite ou un pont composite, constituée de deux composants indépendants de l'infrastructure (1) interne et de l'enveloppe de parement (3) externe qui sont assemblées par une matière de connexion (2). L'invention concerne également un procédé de production d'une prothèse dentaire.
PCT/EP2006/065992 2005-09-05 2006-09-05 Prothese dentaire ceramique et son procede de production WO2007028787A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102005042091A DE102005042091A1 (de) 2005-09-05 2005-09-05 Keramischer Zahnersatz und Verfahren zu dessen Herstellung
DE102005042091 2005-09-05
DE102005057410 2005-12-01
DE102005057410 2005-12-01

Publications (1)

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EP2172168A1 (fr) 2008-10-01 2010-04-07 3M Innovative Properties Company Appareil dentaire, procédé pour la fabrication d'un appareil dentaire et son utilisation
EP2298228A1 (fr) 2009-09-18 2011-03-23 Ivoclar Vivadent AG Procédé de réduction du temps d'usinage d'une ébauche dentaire en céramique
DE102009051593A1 (de) * 2009-11-02 2011-05-05 Olaf GLÜCK Haftvermittler zwischen Oxidkeramik und einem Verblendwerkstoff, insbesondere für dentale Zwecke, Verfahren zu seiner Anwendung sowie Kit zu seiner Herstellung und Applikation
DE102009046639A1 (de) * 2009-11-11 2011-05-12 BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG Verfahren zur Herstellung einer dentalen Restauration
WO2012021442A1 (fr) * 2010-08-11 2012-02-16 3M Innovative Properties Company Couronnes dentaires revêtues et leur procédé de fabrication
EP2431006A1 (fr) * 2010-09-16 2012-03-21 3M Innovative Properties Company Procédé de fabrication d'une restauration dentaire
DE102011103027A1 (de) 2010-11-08 2012-05-10 Peter NEUMEIER Verbundkrone/Verbundbrücke und Verfahren zu deren Herstellung
US8546280B2 (en) 2005-02-08 2013-10-01 Ivoclar Vivadent Ag Lithium silicate materials
US20130255850A1 (en) * 2010-12-09 2013-10-03 Vita Zahnfabrik H. Rauter Gmbh & Co. Kg Universal veneering of frameworks of dental restorations
US8557150B2 (en) 2010-04-16 2013-10-15 Ivoclar Vivadent Ag Lithium silicate glass ceramic and glass with ZrO2 content
WO2013164256A1 (fr) * 2012-05-04 2013-11-07 Ivoclar Vivadent Ag Vitrocéramique à base de disilicate de lithium et d'apatite
DE102012108153A1 (de) * 2012-09-03 2014-03-06 Ludwig-Maximilians-Universität München Rohling und Verfahren zur Herstellung einer Dentalrestauration durch substraktive Bearbeitung
US8721938B2 (en) 2009-09-30 2014-05-13 3M Innovative Properties Company Methods for making layered dental appliances
US8770975B2 (en) 2008-12-15 2014-07-08 3M Innovative Properties Company Method of making a dental restoration from a frame and a veneer
US8813364B2 (en) 2009-12-18 2014-08-26 3M Innovative Properties Company Methods for making layered dental appliances
US8834752B2 (en) 2009-09-30 2014-09-16 3M Innovative Properties Company Systems and methods for making layered dental appliances
US9039947B2 (en) 2009-09-30 2015-05-26 3M Innovative Properties Company Methods for making layered dental appliances from the outside in
US9044292B2 (en) 2010-08-11 2015-06-02 3M Innovative Properties Company Dental articles including a ceramic and microparticle coating and method of making the same
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US9232989B2 (en) 2011-10-14 2016-01-12 Ivoclar Vivadent Ag Lithium silicate glass ceramic and lithium silicate glass comprising a divalent metal oxide
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US9326835B2 (en) 2010-04-16 2016-05-03 Ivoclar Vivadent Ag Process for the preparation of dental restorations
US9370404B2 (en) 2010-08-11 2016-06-21 Bhaskar V. Velamakanni Aesthetic and abrasion resistant coated dental articles and methods of making the same
US9402699B2 (en) 2011-10-14 2016-08-02 Ivoclar Vivadent Ag Lithium silicate glass ceramic and lithium silicate glass comprising a trivalent metal oxide
US9403714B2 (en) 2011-10-14 2016-08-02 Ivoclar Vivadent Ag Lithium silicate glass ceramic and lithium silicate glass comprising a hexavalent metal oxide
US9579172B2 (en) 2007-05-15 2017-02-28 3M Innovative Properties Company Method of making a facing for a dental restoration, facing for a dental restoration, and method of making a dental restoration
US9695082B2 (en) 2011-10-14 2017-07-04 Ivoclar Vivadent Ag Lithium silicate glass ceramic and lithium silicate glass comprising a tetravalent metal oxide
US9757217B2 (en) 2012-05-11 2017-09-12 Ivoclar Vivadent Ag Pre-sintered blank for dental purposes
WO2017202869A1 (fr) 2016-05-23 2017-11-30 Bredent Gmbh & Co. Kg Procédé de fabrication de prothèse dentaire
WO2017202867A1 (fr) 2016-05-23 2017-11-30 Bredent Gmbh & Co. Kg Coque céramique pour prothèse dentaire et procédé de fabrication d'une coque céramique pour prothèse dentaire
US9878939B2 (en) 2011-10-14 2018-01-30 Ivoclar Vivadent Ag Lithium silicate glass ceramic and glass with monovalent metal oxide
EP3366260A1 (fr) * 2017-02-24 2018-08-29 STEGER, Heinrich Procédé de fabrication d'une prothèse dentaire
US10064708B2 (en) 2013-02-12 2018-09-04 Ivoclar Vivadent Ag Blank for dental purposes
US10131569B2 (en) 2014-05-13 2018-11-20 Ivoclar Vivadent Ag Method for the preparation of lithium silicate glasses and lithium silicate glass ceramics
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US10391671B2 (en) 2012-04-16 2019-08-27 Vita Zahnfabrik H. Rauter Gmbh & Co. Kg Process for producing a non-dense sintered ceramic molded body having at least two layers
US10457589B2 (en) 2015-01-30 2019-10-29 Ivoclar Vivadent Ag Lithium silicate diopside glass ceramics
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US10646310B2 (en) 2014-07-24 2020-05-12 John Fung Dental prosthesis and moulding method
DE102018128566A1 (de) * 2018-11-14 2020-05-14 Bredent Gmbh & Co. Kg Verfahren zur Anpassung einer keramischen Außenschale
CN114983600A (zh) * 2021-03-02 2022-09-02 北京大学口腔医学院 复合材料牙齿修复体及其制造方法

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EP2172168A1 (fr) 2008-10-01 2010-04-07 3M Innovative Properties Company Appareil dentaire, procédé pour la fabrication d'un appareil dentaire et son utilisation
US8865033B2 (en) 2008-10-01 2014-10-21 3M Innovative Properties Company Process for producing a dental appliance
US8770975B2 (en) 2008-12-15 2014-07-08 3M Innovative Properties Company Method of making a dental restoration from a frame and a veneer
EP2298228A1 (fr) 2009-09-18 2011-03-23 Ivoclar Vivadent AG Procédé de réduction du temps d'usinage d'une ébauche dentaire en céramique
US8834752B2 (en) 2009-09-30 2014-09-16 3M Innovative Properties Company Systems and methods for making layered dental appliances
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DE102009046639A1 (de) * 2009-11-11 2011-05-12 BEGO Bremer Goldschlägerei Wilh. Herbst GmbH & Co. KG Verfahren zur Herstellung einer dentalen Restauration
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EP2648648A1 (fr) * 2010-12-09 2013-10-16 Vita Zahnfabrik H. Rauter GmbH & Co. KG Placage universel de structures de restaurations dentaires
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