EP2513014A1 - Surface conditioning for improving bone cement adhesion to ceramic substrates - Google Patents

Surface conditioning for improving bone cement adhesion to ceramic substrates

Info

Publication number
EP2513014A1
EP2513014A1 EP10798305A EP10798305A EP2513014A1 EP 2513014 A1 EP2513014 A1 EP 2513014A1 EP 10798305 A EP10798305 A EP 10798305A EP 10798305 A EP10798305 A EP 10798305A EP 2513014 A1 EP2513014 A1 EP 2513014A1
Authority
EP
European Patent Office
Prior art keywords
ceramic substrate
silane coupling
coupling agent
substrate according
ceramic
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Withdrawn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
EP10798305A
Other languages
German (de)
French (fr)
Inventor
Stefan Berger
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.)
Ceramtec GmbH
Original Assignee
Ceramtec 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 Ceramtec GmbH filed Critical Ceramtec GmbH
Publication of EP2513014A1 publication Critical patent/EP2513014A1/en
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
    • C04B41/4905—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon
    • C04B41/4922—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes containing silicon applied to the substrate as monomers, i.e. as organosilanes RnSiX4-n, e.g. alkyltrialkoxysilane, dialkyldialkoxysilane
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/46—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with organic materials
    • C04B41/49—Compounds having one or more carbon-to-metal or carbon-to-silicon linkages ; Organo-clay compounds; Organo-silicates, i.e. ortho- or polysilicic acid esters ; Organo-phosphorus compounds; Organo-inorganic complexes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/28—Materials for coating prostheses
    • A61L27/34—Macromolecular materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L29/00—Materials for catheters, medical tubing, cannulae, or endoscopes or for coating catheters
    • A61L29/08—Materials for coatings
    • A61L29/085—Macromolecular materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/08—Materials for coatings
    • A61L31/10—Macromolecular materials
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/82—Coating or impregnation with organic materials
    • C04B41/84—Compounds having one or more carbon-to-metal of carbon-to-silicon linkages
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2400/00—Materials characterised by their function or physical properties
    • A61L2400/18—Modification of implant surfaces in order to improve biocompatibility, cell growth, fixation of biomolecules, e.g. plasma treatment
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00836—Uses not provided for elsewhere in C04B2111/00 for medical or dental applications
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane

Definitions

  • the present invention relates to a ceramic substrate whose surface is modified to improve bone cement adhesion.
  • the aim of the surface modification of ceramic substrates to be used as implants, for example, is to improve the adhesion of commercially available bone cements based on polymethyl methacrylate (PMMA) in order to obtain a high bond strength between substrate material and cement.
  • EP 1202702 B1 discloses a method in which the cement adhesion to an implant can be improved by a three-layer coating system on the implant.
  • the three-layer system consists of (i) a silicate layer (S1O2), (ii) a silane coupling agent and (iii) a preservative polymeric overcoat.
  • the application of the SiO 2 layer is mandatory in order to ensure the connection of the silane coupling agent to the preconditioned surface.
  • Object of the present invention was to provide a simplified compared to the prior art surface conditioning for improving the bone cement adhesion to ceramic substrates to be used, for example, as implants. This object is achieved by a substrate having the features of the main claim. Preferred embodiments are characterized in the subclaims.
  • ceramic substrates which have sufficient hydroxyl groups (OH groups) on their surface for example aluminum oxide ceramics, zirconium oxide ceramics and mixed ceramics of different zirconium oxide and aluminum oxide compositions, can be directly modified with appropriately selected and suitable silane coupling agents.
  • OH groups hydroxyl groups
  • suitable Silanhaftvernn ittler are certain silanes, preferably methoxy, ethoxy and / or chlorosilanes. These silanes react with the OH groups of the substrate surface, resulting in a covalent bond between the silane and the substrate.
  • a sterile silane coupling agent which, on the one hand, reacts with the OH groups of the substrate surface and, on the other hand, has at least one reactive group, ie the monomeric component (methyl methacrylate). of the bone cement can react.
  • Sterile silane coupling agents with reactive acrylate or methacrylate groups have proved to be preferred according to the invention for this purpose.
  • the surface preconditioned by means of suitable and sterile silane coupling agent can be brought into contact with commercially available bone cement immediately after application of the sterile silane coupling agent, resulting in a chemical reaction between the acrylate or methacrylate groups of the sterile silane coupling agent with the monomeric com
  • bone bonds form covalent bonds that ensure a strong bond between substrate and cement.
  • this composite also arises under moist conditions, for example in aqueous media.
  • cover layers based on Methyl methacrylate, polymethylnethacrylate, BisGMA (bisphenol A-glycidyl dimethacrylate), TEGDMA (ethylene glycol dimethacrylate), phenolic resins, and / or mixtures of these components.
  • the reactive double bonds contained in the protective layers react with the double bonds of the silane coupling agent so that the silane coupling agent can no longer be physically and chemically contaminated.
  • the substrate preconditioned with the adhesive and the protective layer preconditioned on the substrate may be sterilized by suitable methods and packaged in a sterile manner. Such sterilized and packaged substrates are protected against contamination and can be stored or transported for several months without loss of quality.
  • the polymeric cover layer is activated by applying bone cement to the substrate surface preconditioned with a silicone filler and the outer layer, resulting in alloying of the polymeric cover layer into the polymer network of the bone cement. This results in adherent, even in aqueous medium resistant connections between bone cement and substrate material.
  • the present invention thus relates to a ceramic substrate in which the surface of the substrate is modified with a silane coupling agent.
  • the substrate has hydroxyl groups (OH groups) on its surface;
  • the substrate is an alumina ceramic, a zirconia ceramic or a mixed ceramic of different composition of zirconia and alumina;
  • the silane coupling agent is a silane that forms a covalent bond with the OH groups of the substrate surface;
  • the silane coupling agent is selected from sterile silane coupling agents;
  • the silane coupling agent is selected from methoxy, ethoxy and / or chlorosilanes;
  • the sterile silane coupling agent reacts on the one hand with the OH groups of the substrate surface and on the other hand at least one reactive
  • the present invention furthermore relates to a ceramic substrate in which the substrate surface preconditioned with a silane coupling agent additionally has a polymeric covering layer which, after complete polymerization, fulfills a protective function of the substrate surface.
  • a ceramic substrate according to the invention with a polymeric cover layer, in which the cover layer is based on methyl methacrylate, polymethyl methacrylate, BisGMA, TEGDMA, phenolic resins and / or mixtures of these components.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Animal Behavior & Ethology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Epidemiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Vascular Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Transplantation (AREA)
  • Dermatology (AREA)
  • Medicinal Chemistry (AREA)
  • Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Biomedical Technology (AREA)
  • Materials For Medical Uses (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Prostheses (AREA)

Abstract

The invention relates to a ceramic substrate, the surface of which is modified for improving bone cement adhesion.

Description

Oberflächenkonditionierung zur Verbesserung der  Surface conditioning to improve the
Knochenzementadhäsion an keramischen Substraten  Bone cement adhesion to ceramic substrates
Die vorliegende Erfindung betrifft ein keramisches Substrat, dessen Oberfläche zur Verbesserung der Knochenzementadhäsion modifiziert ist. Ziel der Oberflächenmodifikation von keramischen Substraten, die beispielsweise als Implantate verwendet werden sollen, ist, die Adhäsion von handelsüblichen Knochenzementen basierend auf Polymethylmethacrylat (PMMA) zu verbessern, um eine hohe Verbundfestigkeit zwischen Substratmaterial und Zement zu erhalten. In der EP 1202702 B1 wird ein Verfahren offenbart, bei dem die Zementadhäsion an einem Implantat durch ein dreischichtiges Beschichtungssystem auf dem Implantat verbessert werden kann. Das dreischichtige System besteht aus (i) einer Silikatschicht (S1O2), (ii) einem Silanhaftvermittler und (iii) einer konservierenden, polymeren Deckschicht. Das Aufbringen der SiO2-Schicht ist dabei mandatorisch, um die Anbindung des Silanhaftvermittlers an die vorkonditionierte Oberfläche zu gewährleisten. The present invention relates to a ceramic substrate whose surface is modified to improve bone cement adhesion. The aim of the surface modification of ceramic substrates to be used as implants, for example, is to improve the adhesion of commercially available bone cements based on polymethyl methacrylate (PMMA) in order to obtain a high bond strength between substrate material and cement. EP 1202702 B1 discloses a method in which the cement adhesion to an implant can be improved by a three-layer coating system on the implant. The three-layer system consists of (i) a silicate layer (S1O2), (ii) a silane coupling agent and (iii) a preservative polymeric overcoat. The application of the SiO 2 layer is mandatory in order to ensure the connection of the silane coupling agent to the preconditioned surface.
Aufgabe der vorliegenden Erfindung war, eine im Vergleich zum Stand der Technik vereinfachte Oberflächenkonditionierung zur Verbesserung der Knochenzementadhäsion an keramischen Substraten, die beispielsweise als Implantate verwendet werden sollen, bereitzustellen. Diese Aufgabe wird erfindungsgemäß durch ein Substrat mit den Merkmalen des Hauptanspruchs gelöst. Vorzugsweise Ausgestaltungen sind in den Unteransprüchen charakterisiert. Object of the present invention was to provide a simplified compared to the prior art surface conditioning for improving the bone cement adhesion to ceramic substrates to be used, for example, as implants. This object is achieved by a substrate having the features of the main claim. Preferred embodiments are characterized in the subclaims.
Überraschenderweise wurde gefunden, dass keramische Substrate, die an ihrer Oberfläche ausreichend Hydroxyl-Gruppen (OH-Gruppen) besitzen, dazu zählen beispielsweise Aluminiumoxidkeramiken, Zirkonoxidkeramiken und Mischkeramiken unterschiedlicher Zusammensetzung aus Zirkonoxid und Aluminiumoxid, mit entsprechend ausgewählten und geeigneten Silanhaftvermittlern unmittelbar modifiziert werden können. Auf das vorherige Aufbringen einer SiO2-Schicht kann erfindungsgemäß verzichtet werden. Erfindungsgemä ß geeignete Silanhaftvernn ittler sind bestimmte Silane, vorzugsweise Methoxy-, Ethoxy- und / oder Chlorsilane. Diese Silane reagieren dabei mit den OH-Gruppen der Substratoberfläche, wobei eine kovalente Bindung zwischen dem Silan und dem Substrat entsteht. Surprisingly, it has been found that ceramic substrates which have sufficient hydroxyl groups (OH groups) on their surface, for example aluminum oxide ceramics, zirconium oxide ceramics and mixed ceramics of different zirconium oxide and aluminum oxide compositions, can be directly modified with appropriately selected and suitable silane coupling agents. On the previous one Applying a SiO 2 layer can be dispensed with according to the invention. According to the invention suitable Silanhaftvernn ittler are certain silanes, preferably methoxy, ethoxy and / or chlorosilanes. These silanes react with the OH groups of the substrate surface, resulting in a covalent bond between the silane and the substrate.
Die erfolgreiche Anbindung von unterschiedlichen Haftvermittlern konnte durch Bestimmung des Kontaktwinkels von Wasser sowie durch Bestimmung des Siliziumgehalts an der Substratoberfläche nachgewiesen werden. The successful attachment of different adhesion promoters could be demonstrated by determining the contact angle of water and by determining the silicon content at the substrate surface.
Zur Verbesserung der Zementadhäsion ist es weiterhin von Vorteil, einen sterilen Silanhaftvermittler zu verwenden , der zum einen m it den OH-Gruppen der Substratoberfläche reagiert und zum anderen mindestens eine reaktive Gruppe besitzt, d ie m it der monomeren Kom ponente (Methyl methacryl at) des Knochenzements reagieren kann. Als erfindungsgemäß bevorzugt haben sich hierfür sterile Silanhaftvermittler mit reaktiven Acrylat- bzw. Methacrylatgruppen erwiesen. To improve the cement adhesion, it is furthermore advantageous to use a sterile silane coupling agent which, on the one hand, reacts with the OH groups of the substrate surface and, on the other hand, has at least one reactive group, ie the monomeric component (methyl methacrylate). of the bone cement can react. Sterile silane coupling agents with reactive acrylate or methacrylate groups have proved to be preferred according to the invention for this purpose.
Die mittels geeignetem und sterilem Silanhaftvermittler vorkonditionierte Oberfläche kann unmittelbar nach Aufbringen des sterilen Silanhaftvermittlers mit handelsüblichem Knochenzement in Kontakt gebracht werden, wodurch infolge einer chemischen Reaktion zwischen den Acrylat- bzw. Methacrylatgruppen des steri l en S i l a n h aftverm ittl ers m it d en monomeren Kom pon enten d es Knochenzements kovalente Bindungen entstehen, die einen festen Verbund zwischen Substrat und Zement gewährleisten. Überraschenderweise entsteht dieser Verbund auch unter feuchten Bedingungen, beispielsweise auch in wässrigen Medien. Weiterhin ist es erfindungsgemäß möglich, auf die mit einem geeigneten Silan haftverm ittler vorkond ition ierte Substratoberfläche eine polymere Deckschicht aufzutragen, die nach vollständiger Polymerisation eine Schutzfunktion der Substratoberfläche erfüllt. Als erfindungsgemäß bevorzugt haben sich h ierbei als Schutzschichten Deckschichten auf Basis von Methylmethacrylat, Polymethylnnethacrylat, BisGMA (Bisphenol A- Glycidyldimethacrylat), TEGDMA (T ethylenglycoldimethacrylat), Phenolharze und / oder Gemische dieser Komponenten erwiesen. Dabei reagieren die in den Schutzschichten enthaltenen reaktiven Doppelbindungen mit den Doppelbindungen des Silanhaftvermittlers, so dass der Silanhaftvermittler physikalisch und chemisch nicht mehr kontaminierbar ist. The surface preconditioned by means of suitable and sterile silane coupling agent can be brought into contact with commercially available bone cement immediately after application of the sterile silane coupling agent, resulting in a chemical reaction between the acrylate or methacrylate groups of the sterile silane coupling agent with the monomeric com In addition, bone bonds form covalent bonds that ensure a strong bond between substrate and cement. Surprisingly, this composite also arises under moist conditions, for example in aqueous media. Furthermore, it is possible according to the invention to apply a polymeric covering layer to the substrate surface which is liable to adhesion with a suitable silane in order to fulfill a protective function of the substrate surface after complete polymerization. As preferred according to the invention, cover layers based on Methyl methacrylate, polymethylnethacrylate, BisGMA (bisphenol A-glycidyl dimethacrylate), TEGDMA (ethylene glycol dimethacrylate), phenolic resins, and / or mixtures of these components. The reactive double bonds contained in the protective layers react with the double bonds of the silane coupling agent so that the silane coupling agent can no longer be physically and chemically contaminated.
I m An sch l u ss da ra n ka n n d as m it S i l a n haftverm ittl er u nd polym erer Schutzschicht vorkonditionierte Substrat mittels geeigneten Verfahren sterilisiert und steril verpackt werden. Derartige sterilisierte und verpackte Substrate sind vor Verschmutzung geschützt und ohne Qualitätsverluste mehrere Monate lager- bzw. transportfähig. Durch Aufbringen von Knochenzement auf die mit einem S i l a n h aftverm ittl er u nd d er pol ym eren Deckschicht vorkonditionierte Substratoberfläche wird die polymere Deckschicht aktiviert, was zu einer Ein leg ierung der polymeren Decksch icht in das Polymernetzwerk des Knochenzements führt. Dabei entstehen haftfeste, auch im wässrigen Medium beständige Verbindungen zwischen Knochenzement und Substratmaterial. The substrate preconditioned with the adhesive and the protective layer preconditioned on the substrate may be sterilized by suitable methods and packaged in a sterile manner. Such sterilized and packaged substrates are protected against contamination and can be stored or transported for several months without loss of quality. The polymeric cover layer is activated by applying bone cement to the substrate surface preconditioned with a silicone filler and the outer layer, resulting in alloying of the polymeric cover layer into the polymer network of the bone cement. This results in adherent, even in aqueous medium resistant connections between bone cement and substrate material.
Die vorliegende Erfindung betrifft folglich ein keramisches Substrat, bei dem die Oberfläche des Substrats mit einem Silanhaftvermittler modifiziert ist. The present invention thus relates to a ceramic substrate in which the surface of the substrate is modified with a silane coupling agent.
Besonders bevorzugt ist ein erfindungsgemäßes keramisches Substrat, bei dem das Substrat an seiner Oberfläche Hydroxyl-Gruppen (OH-Gruppen) besitzt; das Substrat eine Aluminiumoxidkeramik, eine Zirkonoxidkeramik oder eine Mischkeramik unterschiedlicher Zusammensetzung aus Zirkonoxid und Aluminiumoxid ist; der Silanhaftvermittler ein Silan ist, das mit den OH-Gruppen der Substratoberfläche eine kovalente Bindung eingeht; der Silanhaftvermittler ausgewählt ist aus sterilen Silanhaftvermittlern; der Silanhaftvermittler ausgewählt ist aus den Methoxy-, Ethoxy- und / oder Chlorsilanen; der sterile Silanhaftvermittler zum einen mit den OH-Gruppen der Substratoberfläche reagiert und zum anderen mindestens eine reaktiveParticularly preferred is a ceramic substrate according to the invention, in which the substrate has hydroxyl groups (OH groups) on its surface; the substrate is an alumina ceramic, a zirconia ceramic or a mixed ceramic of different composition of zirconia and alumina; the silane coupling agent is a silane that forms a covalent bond with the OH groups of the substrate surface; the silane coupling agent is selected from sterile silane coupling agents; the silane coupling agent is selected from methoxy, ethoxy and / or chlorosilanes; the sterile silane coupling agent reacts on the one hand with the OH groups of the substrate surface and on the other hand at least one reactive
Gruppe besitzt, die mit der monomeren Komponente eines Knochenzements reagieren kann; der sterile Silanhaftvermittler reaktive Acrylat- bzw. Methacrylatgruppen aufweist. Weiterhin betrifft die vorliegende Erfindung ein keramisches Substrat, bei dem die mit einem Silanhaftvermittler vorkonditionierte Substratoberfläche zusätzlich eine polymere Deckschicht aufweist, die nach vollständiger Polymerisation eine Schutzfunktion der Substratoberfläche erfüllt. Has a group which can react with the monomeric component of a bone cement; the sterile silane coupling agent has reactive acrylate or methacrylate groups. The present invention furthermore relates to a ceramic substrate in which the substrate surface preconditioned with a silane coupling agent additionally has a polymeric covering layer which, after complete polymerization, fulfills a protective function of the substrate surface.
Besonders bevorzugt ist ein erfindungsgemäßes keramisches Substrat mit einer polymeren Deckschicht, bei dem die Deckschicht auf Methyl methacrylat, Polymethylmethacrylat, BisGMA, TEGDMA, Phenolharze und / oder auf Gemischen dieser Komponenten basiert. Particularly preferred is a ceramic substrate according to the invention with a polymeric cover layer, in which the cover layer is based on methyl methacrylate, polymethyl methacrylate, BisGMA, TEGDMA, phenolic resins and / or mixtures of these components.

Claims

Patentansprüche claims
Keramisches Substrat, dadurch gekennzeichnet, dass die Oberfläche des Substrats mit einem Silanhaftvermittler modifiziert ist. Ceramic substrate, characterized in that the surface of the substrate is modified with a Silanhaftvermittler.
Keramisches Substrat gemäß Anspruch 1 , dadurch gekennzeichnet, dass das Substrat an seiner Oberfläche Hydroxyl-Gruppen (OH-Gruppen) besitzt. Ceramic substrate according to claim 1, characterized in that the substrate has on its surface hydroxyl groups (OH groups).
Keramisches Substrat gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Substrat eine Aluminiumoxidkeramik, eine Zirkonoxidkeramik oder eine Mischkeramik unterschiedlicher Zusammensetzung aus Zirkonoxid und Aluminiumoxid ist. Ceramic substrate according to claim 1 or 2, characterized in that the substrate is an alumina ceramic, a zirconia or a mixed ceramic of different composition of zirconia and alumina.
Keramisches Substrat gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Silanhaftvermittler ein Silan ist, das m it den OH-Gruppen der Substratoberfläche eine kovalente Bindung eingeht. Ceramic substrate according to one or more of the preceding claims, characterized in that the silane coupling agent is a silane which forms a covalent bond with the OH groups of the substrate surface.
Keramisches Substrat gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Silanhaftvermittler ausgewählt ist aus sterilen Silanhaftvermittlern. Ceramic substrate according to one or more of the preceding claims, characterized in that the silane coupling agent is selected from sterile Silanhaftvermittlern.
Keramisches Substrat gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Silanhaftvermittler ausgewählt ist aus den Methoxy-, Ethoxy- und / oder Chlorsilanen. Ceramic substrate according to one or more of the preceding claims, characterized in that the silane coupling agent is selected from the methoxy, ethoxy and / or chlorosilanes.
Keramisches Substrat gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der sterile Silanhaftvermittler zum einen mit den OH-Gruppen der Substratoberfläche reagiert und zum anderen mindestens eine reaktive Gruppe besitzt, die mit der monomeren Komponente eines Knochenzements reagieren kann. Ceramic substrate according to one or more of the preceding claims, characterized in that the sterile silane coupling agent reacts on the one hand with the OH groups of the substrate surface and on the other hand has at least one reactive group which can react with the monomeric component of a bone cement.
8. Keramisches Substrat gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der sterile Silanhaftvermittler reaktive Acrylat- bzw. Methacrylatgruppen aufweist. 8. Ceramic substrate according to one or more of the preceding claims, characterized in that the sterile Silanhaftvermittler reactive acrylate or methacrylate groups.
9. Keramisches Substrat gemäß einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die mit einem9. Ceramic substrate according to one or more of the preceding claims, characterized in that the with a
Silanhaftvermittler gemäß einem oder mehreren der vorhergehenden Ansprüche vorkonditionierte Substratoberfläche zusätzlich eine polymere Deckschicht aufweist, die nach vollständiger Polymerisation eine Schutzfunktion der Substratoberfläche erfüllt. Silane coupling agent according to one or more of the preceding claims preconditioned substrate surface additionally comprises a polymeric cover layer, which fulfills a protective function of the substrate surface after complete polymerization.
10. Keramisches Substrat gemäß Anspruch 9, dadurch gekennzeichnet, dass die Deckschicht auf Methyl methacrylat, Polymethylmethacrylat, BisGMA, TEGDMA, Phenolharze und / oder auf Gemischen dieser Komponenten basiert. 10. Ceramic substrate according to claim 9, characterized in that the cover layer is based on methyl methacrylate, polymethyl methacrylate, BisGMA, TEGDMA, phenolic resins and / or mixtures of these components.
EP10798305A 2009-12-17 2010-12-16 Surface conditioning for improving bone cement adhesion to ceramic substrates Withdrawn EP2513014A1 (en)

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