DE4209322A1 - Process for producing an implant with a metallic open-mesh structure at least partially covering its surface - Google Patents

Process for producing an implant with a metallic open-mesh structure at least partially covering its surface

Info

Publication number
DE4209322A1
DE4209322A1 DE4209322A DE4209322A DE4209322A1 DE 4209322 A1 DE4209322 A1 DE 4209322A1 DE 4209322 A DE4209322 A DE 4209322A DE 4209322 A DE4209322 A DE 4209322A DE 4209322 A1 DE4209322 A1 DE 4209322A1
Authority
DE
Germany
Prior art keywords
wax
mesh structure
mesh
implant
positive model
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.)
Granted
Application number
DE4209322A
Other languages
German (de)
Other versions
DE4209322C2 (en
Inventor
Olaf Ahlers
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.)
Eska Medical GmbH and Co
Original Assignee
Eska Medical GmbH and Co
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 Eska Medical GmbH and Co filed Critical Eska Medical GmbH and Co
Publication of DE4209322A1 publication Critical patent/DE4209322A1/en
Application granted granted Critical
Publication of DE4209322C2 publication Critical patent/DE4209322C2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • 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
    • A61F2002/3092—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth having an open-celled or open-pored structure
    • 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
    • A61F2/3094—Designing or manufacturing processes
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • A61F2002/30957—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using a positive or a negative model, e.g. moulds

Description

Die Erfindung betrifft eine Weiterbildung des in der deutschen Patentanmeldung P 41 28 425.9 beschriebenen Verfahrens zur Herstellung eines Implantates mit einer seine Oberfläche zumindest teilweise bedeckenden metallischen offenmaschigen dreidimensionalen Struktur.The invention relates to a further development of the German patent application P 41 28 425.9 described method for producing a Implants with a surface at least partially covering metallic open-mesh three-dimensional structure.

In dieser Druckschrift ist bereits ausgeführt, daß als Verstärkungsmittel für die Maschenwendeln verflüssigtes Wachs als Verstärkungsmittel verwendet werden kann.In this document it is already stated that as a reinforcing agent for the mesh helices liquefied wax used as a reinforcing agent can be.

Es hat sich nun herausgestellt, daß das Besprühen mit verflüssigtem Wachs nicht ganz einfach handhabbar ist. Dies insbesondere vor dem Hintergrund, daß verflüssigtes Wachs in der Praxis eine Temperatur von ca. 80°C aufweisen muß, damit es in die räumliche Tiefe der dreidimensionalen offenmaschigen Raumstruktur des Positivmodells eindringen kann. Auch ist der benötigte Druck, unter dem das verflüssigte Wachs in die Struktur eingebracht wird, kritisch.It has now been found that spraying not easy with liquefied wax is manageable. This especially before Background that liquefied wax in practice must have a temperature of about 80 ° C, so it into the spatial depth of the three-dimensional open-meshed spatial structure of the positive model can penetrate. The pressure required is also below which the liquefied wax into the structure is introduced, critically.

Vor diesem Hintergrund ist es die Aufgabe der vorliegenden Erfindung, das Verfahren gemäß der oben bezeichneten Druckschrift so weiterzubilden, daß die Oberflächenstruktur des Positivmodells mit hoher Genauigkeit bis hin zum massiven Kern des Implantats dargestellt werden kann und die Verstärkung der Maschenwendeln unproblematisch erfolgen kann. Against this background, it is the task of present invention, the method according to the above to further develop the specified publication so that the Surface structure of the positive model with high Accuracy down to the solid core of the implant can be represented and the amplification of the Mesh coils can be done without problems.  

Gelöst wird diese Aufgabe durch das Verfahren gemäß dem Anspruch 1, welches durch den Verfahrensschritt gemäß Anspruch 2 in vorteilhafter Weiterbildung durchgeführt werden kann.This task is solved by the method according to claim 1, which by the method step in an advantageous further development can be carried out.

Demgemäß findet als Verstärkungsmittel ein kaltemulgierendes Wachs Verwendung. Die Emulsion ist insbesondere in Wasser mit einer Temperatur von 20-40°C hergestellt. Nach dem Einbringen der Wachs- Wasseremulsion in die dreidimensionale offenmaschige Raumnetzstruktur des Positivmodells des Implantates scheidet sich das Wachs auf den Maschenwendeln ab und bildet die Verstärkungsschicht. Das Wasser, in dem das Wachs emulgiert ist, verdunstet bei diesem Vorgang.Accordingly, as a reinforcing agent cold emulsifying wax use. The emulsion is especially in water with a temperature of 20-40 ° C produced. After inserting the wax Water emulsion in the three-dimensional open mesh Spatial network structure of the positive model of the implant the wax separates on the mesh helices and forms the reinforcement layer. The water, in from which the wax is emulsified evaporates Process.

In Weiterbildung des Verfahrens wird die Verstärkungsschicht auf den Maschenwendeln der dreidimensionalen offenmaschigen Struktur stabilisiert durch Besprühen mit einem Kunststofflack. Dieser legt sich quasi wie ein schützender Mantel über das auf den Maschenwendeln abgeschiedene Wachs und verhindert ein Abbröckeln der Wachsschicht bei der weiteren Handhabung des Positivmodells.In a further development of the process Reinforcing layer on the mesh of the three-dimensional open-mesh structure stabilized by spraying with a Plastic paint. This is practically like an insert protective coat over that on the mesh coils deposited wax and prevents crumbling the wax layer in the further handling of the Positive model.

Die Temperaturen, bei der die Wachs-Wasseremulsion verarbeitet wird, ist unkritisch im Verhältnis zu dem Bereich der Temperaturen, unter denen flüssiges Wachs verarbeitet wird.The temperatures at which the wax-water emulsion processed is not critical in relation to the range of temperatures below which liquid Wax is processed.

Vorzugsweise wird die Wachs-Wasseremulsion hergestellt durch Einrühren von in Pulverform vorliegendem Wachs, wie er beispielsweise aus der Arzneimittelindustrie für die Herstellung von Tablettenbeschichtungen verwendet wird. Preferably the wax-water emulsion prepared by stirring in powder form Present wax, such as from the Pharmaceutical industry for the production of Tablet coatings are used.  

Als Kunststofflack kann beispielsweise Acryllack zur Stabilisierung der Verstärkungsschichten aus Wachs verwendet werden.As a plastic paint, for example, acrylic paint Stabilization of the reinforcement layers made of wax be used.

Claims (2)

1. Verfahren zur Herstellung eines Implantates mit einer seine Oberfläche zumindest teilweise bedeckenden metallischen offenmaschigen Struktur unter Anwendung eines verlorenen Positivmodells aus einem Wachsgrundkörper und einer auf diesem verhafteten offenmaschigen, aus Maschenwendeln gebildeten dreidimensionalen Maschenstruktur aus veraschbarem Material mit einer Weite jeder einzelnen Masche im Bereich von 2 bis 5 mm, bei dem die Maschenwendeln durch Besprühen mit einem veraschbaren Verstärkungsmittel verstärkt werden, nach Austrocknung des Positivmodells dieses im Ganzen mit einer keramischen Masse eingebettet wird, das Modell erhitzt wird, wobei der Wachsgrundkörper schmilzt, die Maschenstruktur mit ihrer Verstärkung verascht und die keramische Masse gebrannt wird, und bei dem in die zurückbleibenden Hohlräume Metall gegossen wird und nach dessen Erstarren die keramische Masse entfernt wird, nach der deutschen Patentanmeldung P 41 28 425, bei dem als Verstärkungsmittel ein in Wasser kaltemulgierendes Wachs verwendet wird.1. Method of making an implant with one at least partially its surface covering metallic open-mesh structure using a lost positive model from a wax base and one on top of it arrested open-meshed, from mesh coils formed three-dimensional mesh structure incinerable material with a width each single stitch in the range of 2 to 5 mm, at which the mesh coils by spraying with a incinerable reinforcing agent reinforced after drying out the positive model this as a whole with a ceramic mass is embedded, the model is heated, whereby the wax base melts, the Ashes mesh structure with its reinforcement and the ceramic mass is fired, and at the metal in the remaining cavities is poured and after its solidification the ceramic mass is removed after the German patent application P 41 28 425, in which as a reinforcing agent in water cold emulsifying wax is used. 2. Verfahren nach Anspruch 1, bei dem die die Maschenwendeln verstärkenden Wachs schichten stabilisiert werden durch ein Besprühen des Positivmodells mit einem Kunststofflack.2. The method of claim 1, wherein the Layer coils of reinforcing wax be stabilized by spraying the Positive model with a plastic paint.
DE19924209322 1991-08-27 1992-03-23 Method for producing an implant with a metallic open-mesh structure at least partially covering its surface Expired - Lifetime DE4209322C2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19914128425 DE4128425A1 (en) 1991-08-27 1991-08-27 Medical implant prodn. with open-structured metallic surfaces - by lost-wax process where open-meshed surface element is reinforced with sprayed-osilicone@ or resin material

Publications (2)

Publication Number Publication Date
DE4209322A1 true DE4209322A1 (en) 1993-09-30
DE4209322C2 DE4209322C2 (en) 1994-02-17

Family

ID=6439244

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19914128425 Granted DE4128425A1 (en) 1991-08-27 1991-08-27 Medical implant prodn. with open-structured metallic surfaces - by lost-wax process where open-meshed surface element is reinforced with sprayed-osilicone@ or resin material
DE19924209322 Expired - Lifetime DE4209322C2 (en) 1991-08-27 1992-03-23 Method for producing an implant with a metallic open-mesh structure at least partially covering its surface

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE19914128425 Granted DE4128425A1 (en) 1991-08-27 1991-08-27 Medical implant prodn. with open-structured metallic surfaces - by lost-wax process where open-meshed surface element is reinforced with sprayed-osilicone@ or resin material

Country Status (1)

Country Link
DE (2) DE4128425A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0747024A2 (en) * 1995-06-09 1996-12-11 Bristol-Myers Squibb Company Orthopaedic bearing component and method for making the same

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128425A1 (en) * 1991-08-27 1992-03-19 Eska Medical Gmbh & Co Medical implant prodn. with open-structured metallic surfaces - by lost-wax process where open-meshed surface element is reinforced with sprayed-osilicone@ or resin material
DE4214357C2 (en) * 1992-05-05 1994-02-24 Eska Medical Gmbh & Co Method for producing an implant with a metallic, open-mesh, three-dimensional structure that at least partially covers its surface
CA2142637A1 (en) * 1994-02-18 1995-08-19 Joseph M. Hoherchak Investment casting method and apparatus
DE19507637C1 (en) * 1995-03-04 1996-08-14 Ortigao Jose Flavio Dr Ramalho Biocompatible product and process for its manufacture and use of the product
DE19718886A1 (en) * 1997-05-03 1998-11-05 Bosch Gmbh Robert Process for the production of porous moldings
DE19725210C1 (en) * 1997-06-14 1998-11-05 Access Aachener Ct Fuer Erstar Method for producing metal sponge
DE10024302A1 (en) * 2000-05-17 2001-11-22 Alstom Power Nv Process for producing a thermally stressed casting
DE102004026959B3 (en) * 2004-06-02 2006-02-16 Girlich, Dieter, Dr. Process for producing metallic lattice structures

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106917A1 (en) * 1981-02-25 1982-11-25 Schuett & Grundei Med Tech IMPLANT AS A REPLACEMENT FOR SPONGIOESE BONES AND METHOD FOR THE PRODUCTION THEREOF
DE3224265A1 (en) * 1982-06-28 1984-01-05 Schütt und Grundei GmbH Medizintechnische Fabrikation, 2400 Lübeck METHOD FOR PRODUCING AN IMPLANT AS BONE REPLACEMENT
DE4128425A1 (en) * 1991-08-27 1992-03-19 Eska Medical Gmbh & Co Medical implant prodn. with open-structured metallic surfaces - by lost-wax process where open-meshed surface element is reinforced with sprayed-osilicone@ or resin material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT186028B (en) * 1949-10-13 1956-06-25 Hans Hermann Petersilie Impregnated fabric for molding and modeling plastic objects, preferably for orthopedic purposes
DK124376B (en) * 1967-01-09 1972-10-16 American Cyanamid Co Surgical prosthesis and two-component cord for its manufacture.
US4636219A (en) * 1985-12-05 1987-01-13 Techmedica, Inc. Prosthesis device fabrication
US4990163A (en) * 1989-02-06 1991-02-05 Trustees Of The University Of Pennsylvania Method of depositing calcium phosphate cermamics for bone tissue calcification enhancement
DE3928394A1 (en) * 1989-08-28 1991-03-21 Eska Medical Gmbh & Co METHOD FOR PRODUCING AN IMPLANT WITH ITS SURFACE AT LEAST PARTLY COVERING METALLIC OPEN-CELLED STRUCTURE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3106917A1 (en) * 1981-02-25 1982-11-25 Schuett & Grundei Med Tech IMPLANT AS A REPLACEMENT FOR SPONGIOESE BONES AND METHOD FOR THE PRODUCTION THEREOF
DE3224265A1 (en) * 1982-06-28 1984-01-05 Schütt und Grundei GmbH Medizintechnische Fabrikation, 2400 Lübeck METHOD FOR PRODUCING AN IMPLANT AS BONE REPLACEMENT
DE4128425A1 (en) * 1991-08-27 1992-03-19 Eska Medical Gmbh & Co Medical implant prodn. with open-structured metallic surfaces - by lost-wax process where open-meshed surface element is reinforced with sprayed-osilicone@ or resin material

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0747024A2 (en) * 1995-06-09 1996-12-11 Bristol-Myers Squibb Company Orthopaedic bearing component and method for making the same
EP0747024A3 (en) * 1995-06-09 1998-03-18 Bristol-Myers Squibb Company Orthopaedic bearing component and method for making the same

Also Published As

Publication number Publication date
DE4128425A1 (en) 1992-03-19
DE4209322C2 (en) 1994-02-17
DE4128425C2 (en) 1993-07-15

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