DE102005050560A1 - Support material useful as a scaffold material for reconstructive surgery comprises a nonwoven formed and strengthened from individual fibers according to a target three-dimensional geometry - Google Patents
Support material useful as a scaffold material for reconstructive surgery comprises a nonwoven formed and strengthened from individual fibers according to a target three-dimensional geometry Download PDFInfo
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- DE102005050560A1 DE102005050560A1 DE102005050560A DE102005050560A DE102005050560A1 DE 102005050560 A1 DE102005050560 A1 DE 102005050560A1 DE 102005050560 A DE102005050560 A DE 102005050560A DE 102005050560 A DE102005050560 A DE 102005050560A DE 102005050560 A1 DE102005050560 A1 DE 102005050560A1
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
- D04H5/04—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by applying or incorporating chemical or thermo-activatable bonding agents in solid or liquid form
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
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- 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
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/56—Porous materials, e.g. foams or sponges
-
- 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
- A61L27/50—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
- A61L27/58—Materials at least partially resorbable by the body
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/4334—Polyamides
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4374—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece using different kinds of webs, e.g. by layering webs
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
- D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Transplantation (AREA)
- Veterinary Medicine (AREA)
- Medicinal Chemistry (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Dermatology (AREA)
- Mechanical Engineering (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Prostheses (AREA)
Abstract
Description
Die Erfindung betrifft ein Trägermaterial und ein Verfahren zu seiner Herstellung, vorzugsweise für die Fertigung von dreidimensionalen textilen Trägerstrukturen, so genannten „Scaffolds", für die rekonstruktive Chirurgie nach den Merkmalen der Ansprüche 1 und 13.The The invention relates to a carrier material and a method for its production, preferably for the production of three-dimensional textile support structures, so-called "scaffolds", for the reconstructive Surgery according to the features of claims 1 and 13.
Es ist bereits bekannt, Zellen auf Trägermaterialien (Scaffolds) zu kultivieren und die so hergestellten Gewebekultur als Gewebeersatz zu verwenden. Als Trägermaterialien werden z.B. Gele, Faserstoffe, poröse Keramiken oder andere zwei- bzw. dreidimensionale Strukturen eingesetzt. Es ist bekannt, verschiedene Gewebe, wie z.B. Knorpel, die durch Verletzung, Abnutzung oder Krankheit defekt sind, mit Hilfe von gezüchteten Gewebekulturen zu therapieren. Hierzu werden körpereigene Zellen beispielsweise in dreidimensionalen Trägermaterialien eingebracht und in vitro vermehrt und das so hergestellte Material in den Körper implantiert. Die für biokompatible Implantate eingesetzten Trägermaterialien haben wesentlichen Einfluss auf die Besiedelung, das Zellwachstum und die spätere Funktion des Implantates.It is already known cells on support materials (scaffolds) to culture and the tissue culture thus prepared as a tissue replacement to use. As carrier materials are used e.g. Gels, fibrous materials, porous ceramics or other or three-dimensional structures used. It is known, different Tissue, e.g. Cartilage caused by injury, abrasion or disease are broken, with the help of bred Tissue cultures to treat. For this purpose, the body's own cells, for example introduced in three-dimensional support materials and propagated in vitro, and the material thus produced is implanted in the body. The for biocompatible implants used carrier materials have essential Influence on colonization, cell growth and later function of the implant.
Faserstoffe bieten große Oberflächen für den Kontakt mit Zellen und bilden offenporige Strukturen, die für die Versorgung der Zellen mit Nährlösung notwendig sind. Häufig kommen heute Vliesstoffe zum Einsatz, die jedoch nachteilige Inhomogenitäten in der Struktur aufweisen. So werden größere Freiräume zwischen den Fasern nur sehr langsam von Zellendurchwachsen. In Bereichen, in denen Fasern sehr dicht liegen ist die Zelldichte dagegen sehr gering. Eine Organisation der Faseranordnung in Vliesstoffen ist durch die starke Streuung in der Faserorientierung nur begrenzt möglich. Textile Flächengebilde aus Fäden sind zwar sehr gut strukturiert, aber die Abstände zwischen den Fasern sind extrem unterschiedlich. Innerhalb der Fäden, die üblicherweise aus je 20 bis 200 Fasern bestehen, liegen die Fasern extrem dicht und zwischen den Fäden bestehen oft sehr große Abstände.fibers offer great surfaces for the contact with cells and form open-pore structures responsible for the supply the cells with nutrient solution necessary are. Often Nonwovens are used today, however, the disadvantageous inhomogeneities in the Structure have. This will allow greater freedom between the fibers only very slowly from Zellendurchwachsen. In areas, in which fibers are very dense, the cell density is very high low. An organization of fiber assembly in nonwovens is limited only by the strong dispersion in fiber orientation possible. Textile fabrics made of threads Although very well structured, but the distances between the fibers are extremely different. Within the threads, usually from 20 to 200 fibers, the fibers are extremely dense and between the threads often exist very large Distances.
Trägermaterialien aus textilen Flächengebilden, insbesondere aus Vliesstoffen, Fasergeweben oder Maschenstoffen, weisen durch die überwiegend horizontale Anordnung der Fasern nur eine sehr geringe Druckstabilität auf.support materials from textile fabrics, in particular of nonwovens, fibrous fabrics or knit fabrics, show through the predominantly horizontal Arrangement of the fibers only a very low pressure stability.
Bei der Herstellung von Implantaten durch Schneiden und Prägen von zweidimensionalen Vliesen können starke Ungleichmäßigkeiten entstehen. Bei der Zellkultivierung werden homogene Vliesgebilde mit definierten Porengrößen benötigt. Vliesherstellungsverfahren sind für die Massenproduktion ausgelegt und sind für die Herstellung geringer Mengen Vlies aus hochreinen und teuren Fasern nicht geeignet.at the manufacture of implants by cutting and embossing two-dimensional nonwovens can strong inequalities arise. In cell cultivation, homogeneous web structures are formed needed with defined pore sizes. Nonwoven manufacturing techniques are for designed for mass production and are lower for manufacturing Quantities fleece from high-purity and expensive fibers not suitable.
Aus
der
Bei dem Verfahren ist der Einsatz eines dreidimensional geformten Siebes als Negativform notwendig, worauf sich die Fasern sammeln können.at The method is the use of a three-dimensionally shaped sieve necessary as a negative mold, whereupon the fibers can collect.
Aus
der
Nachteilig ist hierbei, dass die Bauteile einen reinen schalenförmigen Aufbau aufweisen. Damit sind die Bauteile zwar dreidimensional gestaltet, besitzen jedoch die gleiche Bauteildicke über den gesamten Querschnitt.adversely Here is that the components have a pure shell-like structure exhibit. Thus, the components are indeed designed in three dimensions, However, they have the same component thickness over the entire cross section.
In
Nachteilig ist hierbei, dass bei diesem Verfahren keine Fasermaterialien verwendet werden können.adversely Here is that in this process does not use fiber materials can be.
Die Aufgabe der Erfindung besteht darin, ein dreidimensionales Trägermaterial aus Fasermaterial und ein Verfahren zu dessen Herstellung anzugeben, das sich frei dimensionieren und ohne Verwendung eines Gesenks oder Vorform herstellen lässt, ohne dabei eine nachteilige Verdichtung des Fasermaterials in Kauf nehmen zu müssen.The The object of the invention is a three-dimensional support material of fibrous material and a method for its production, the dimension yourself freely and without using a die or Preforming, without a disadvantageous compaction of the fiber material in purchase to have to take.
Erfindungsgemäß wird die Aufgabe durch ein Trägermaterial mit den im Anspruch 1 genannten Merkmalen gelöst. Vorteilhafte Ausgestaltungen sind Gegenstand von anhängigen Unteransprüchen.According to the invention Task by a carrier material solved with the features mentioned in claim 1. Advantageous embodiments are the subject of pending Dependent claims.
Weiterhin wird die Aufgabe erfindungsgemäß durch ein Verfahren mit den im Anspruch 13 genannten Merkmalen gelöst. Vorteilhafte Varianten des Verfahrens sind Gegenstand von abhängigen Unteransprüchen.Furthermore, the object is achieved by a method having the features mentioned in claim 13. Advantageous variants of the method are the subject of dependent claims.
Das erfindungsgemäße Trägermaterial besteht aus regellos angeordneten Einzelfasern, die zu einem Vlies dreidimensional mit bestimmter Geometrie geformt und verfestigt sind. Abhängig vom Fasermaterial erfolgt die Verfestigung der Einzelfasern durch thermische, mechanische oder stoffschlüssige Bindetechnologien.The Inventive carrier material consists of randomly arranged single fibers, which become a fleece three-dimensionally shaped and solidified with a specific geometry are. Dependent From the fiber material, the solidification of the individual fibers by thermal, mechanical or cohesive bonding technologies.
Als Fasermaterialien werden biokompatibel synthetisch resorbierbare und/oder nicht abbaubare Fasermaterialien verwendet.When Fiber materials become biocompatible synthetically resorbable and / or non-degradable fiber materials.
Die Länge der einzelnen Fasern liegt zwischen 0,5 mm und einigen Zentimetern. Insbesondere bei Anwendung der Vernadelungstechnik zur Verfestigung des Vlieses ist der Einsatz von Fasern bis zu einer Länge von 20 cm möglich. Der Durchmesser der einzelnen Fasern beträgt zwischen 1 μm und 300 μm. Der Querschnitt der Fasern kann rund oder profiliert sein. Ebenso ist der Einsatz von gewellten und/oder geprägten Kurzfasern möglich.The Length of individual fibers is between 0.5 mm and a few centimeters. Especially when using the needling technique for solidification of the nonwoven is the use of fibers up to a length of 20 cm possible. The diameter of the individual fibers is between 1 μm and 300 μm. The cross section The fibers can be round or profiled. Likewise, the use of corrugated and / or embossed Short fibers possible.
Vorteilhaft lassen sich Hohlfasern für die Herstellung des Trägermaterials einsetzen, die weiterhin vorteilhaft poröse Wände aufweisen können.Advantageous can be hollow fibers for the production of the carrier material use, which may continue to have advantageous porous walls.
Das Trägermaterial kann vorteilhaft aus einer Mischung aus abbaubaren und nicht abbaubaren Fasern hergestellt werden, wobei die abbaubaren Fasern eine unterschiedliche Abbaukinematik aufweisen können.The support material can be advantageous from a mixture of degradable and non-degradable Fibers are made, the degradable fibers a different Can have degradation kinematics.
Die Mischung kann Fasern mit unterschiedlicher Länge und ggf. mit unterschiedlichen Faserquerschnitten aufweisen. Dabei ist es für den Erhalt eines porösen Materials von Vorteil, dass gekräuselte oder gewellte Fasern verarbeitet werden, womit sich eine regellose Anordnung und ein genügend großer Abstand zwischen den Fasern einstellt.The Mixture can fibers with different lengths and possibly with different Have fiber cross sections. It is for the preservation of a porous material advantageous that curled or corrugated fibers are processed, resulting in a random Arrangement and a sufficiently large distance between the fibers.
Bei dem Verfahren zur Herstellung des erfindungsgemäßen Trägermaterials kommt man ohne Verwendung einer Negativform oder eines Gesenks aus. Mit den Fasern wird zunächst auf einer ebenen oder unebenen Unterlage eine Schicht gebildet, die anschließend mittels einer thermischen, mechanischen oder stoffschlüssigen Bindetechnologie verfestigt wird. Der Bereich der Verfestigung ist dabei auf die zu erreichende Geometrie beschränkt. Anschließend erfolgt der Auftrag einer weiteren losen Schicht Fasermaterials, die wiederum einer Verfestigung unterzogen wird, wobei eine Verbindungsbildung mit der bereits zuvor verfestigten Schicht erfolgt.at the process for the preparation of the support material according to the invention is obtained without use a negative mold or a die. With the fibers first on a flat or uneven surface formed a layer, which then by means of solidified by a thermal, mechanical or cohesive bonding technology becomes. The area of consolidation is on the achievable Geometry limited. Subsequently the order of another loose layer of fiber material, which in turn is subjected to solidification, wherein a compound formation takes place with the previously solidified layer.
Die Abfolge der beiden Schritte wird so lange wiederholt, bis die gewünschte Geometrie des Trägermaterials erreicht worden ist. Nicht verbundene Fasern außerhalb des Verfestigungsbereiches der einzelnen losen Schichten können auf einfache Weise vom Trägermaterial mechanisch getrennt werden.The Sequence of the two steps is repeated until the desired geometry of the carrier material has been achieved. Unconnected fibers outside the solidification area of individual loose layers can in a simple way from the carrier material be mechanically separated.
Bei der Herstellung ist neben einer ebenen oder unebenen Unterlage zur Ablage der losen Schicht eine seitliche Begrenzung vorteilhaft aber nicht zwingend erforderlich. Beispielsweise bei Verwendung eines Behälters zur Herstellung des Trägermaterials lässt sich der Umgang mit den Fasern vereinfachen.at The production is in addition to a flat or uneven surface for Loose layer deposit a side border advantageous but not absolutely necessary. For example, when using a container for Production of the carrier material let yourself to make it easier to handle the fibers.
Der Auftrag der losen Schichten erfolgt vorteilhaft aus einem Vorratsbehälter mit einer Dosiereinrichtung. Eine gleichmäßige Verteilung der Faser kann durch verschiedene Mittel zum Abstreichen erreicht werden.Of the Application of the loose layers is advantageously carried out with a storage container a metering device. An even distribution of the fiber can can be achieved by different means of scraping.
Der Auftrag zusätzlicher Materialien, wie beispielsweise Klebstoff, zur Verfestigung der einzelnen Schichten erfolgt mittels einer Dosiereinrichtung, mit der sich die Schichten abscannen lassen, so dass der Auftrag des Klebstoffes der gewünschten Geometrie des Trägermaterials folgt. Die Steuerung bzw. die Scannbewegung erfolgt an Hand eines Computermodells auf Grundlage der Geometriedaten des herzustellenden Trägermaterials.Of the Order additional Materials, such as adhesive, to solidify the individual layers by means of a metering device, with the Allow the layers to scan, leaving the application of the adhesive the desired Geometry of the carrier material follows. The control or the scanning movement takes place by means of a Computer model based on the geometry data of the manufactured Support material.
Die Dosierung des Klebstoffes wird dabei so gewählt, dass im Wesentlichen eine Benetzung der losen Schicht erfolgt. Bei der Wahl einer alternativen Bindetechnologie wird analog verfahren, so dass sich beispielsweise der mechanische Verfestigungsvorgang auf den Bereich der gerade gebildeten losen Schicht beschränkt.The Dosing of the adhesive is chosen so that essentially one Wetting of the loose layer takes place. When choosing an alternative binding technology is analogous procedure, so that, for example, the mechanical Solidification process on the area of the loose layer just formed limited.
Mit Hilfe des erfindungsgemäßen Verfahrens lässt sich aus einem lose aufgeschichteten Fasermaterial mit alternierend folgenden Verfestigungsschritten ein Trägermaterial mit beliebiger dreidimensionaler Gestalt herstellen. Der dazu benötige gerätetechnische Aufwand und die Menge an verbrauchtem Fasermaterial sind gering. Die Porosität ist durch die Wahl der alternierend aufeinander folgenden Verfahrensschritte, durch die Wahl des Fasermaterials, ggf. in bestimmten Mischungen, und die Wahl der Verfestigungstechnologie genau und reproduzierbar einstellbar.With Help of the method according to the invention can be from a loosely piled fiber material with alternating following Solidification steps a carrier material produce with any three-dimensional shape. The equipment required for this purpose Effort and the amount of spent fiber material are low. The porosity is determined by the choice of the alternating successive process steps, by the choice of the fiber material, possibly in certain mixtures, and the choice of solidification technology accurate and reproducible adjustable.
Mit dem erfindungsgemäßen Verfahren lässt sich eine definierte Porosität erreichen. Porositäten um 98% über die gesamte Geometrie des Trägermaterials sind möglich. Es besteht darüber hinaus die Möglichkeit, gezielt Kavitäten und Mikrostrukturen im Trägermaterial zu erzeugten, um die Wachstumsbedingung bei einer Besiedelung mit Zellen und ggf. ein späteres Einwachsen des Implantats zu begünstigen.With the method according to the invention let yourself a defined porosity to reach. Porosities around 98% over the entire geometry of the substrate are possible. It exists about it addition the possibility targeted cavities and microstructures in the substrate to generate the growth condition in colonization with Cells and possibly a later one Ingrowth of the implant to favor.
Die Erfindung wird nachfolgend an Hand von Ausführungsbeispielen noch näher erläutert. In den Zeichnungen zeigen:The The invention will be explained in more detail with reference to exemplary embodiments. In show the drawings:
Als Fasermaterial wurden Polyamidkurzfasern (PA6.6, 1 mm, 6,7 dtex) verwendet. Zur Verfestigung der Fasern wurde ein UV aushärtender Klebstoff eingesetzt, der selbst nicht biokompatibel ist. Für biokompatible Trägermaterialien können geeignete biokompatible Klebstoffe ausgewählt und eingesetzt werden. Es können verschiedene Pharma-Gelatinen (5%ige–20%ige Lösungen) oder fibrilliertes Kollagen eingesetzt werden. Jedoch müssen sie zum Fixieren nicht erhitzt, sondern gekühlt und anschließend z. B. in einer 1%ige EDC-Lösung (N-Dimethylaminopropyl-N-ethylcarbodiimid-Hydrochlorid) in 80%igen Ethanol vernetzt werden.When Fiber material became polyamide short fibers (PA6.6, 1 mm, 6.7 dtex) used. To solidify the fibers was a UV curing Adhesive used, which is not biocompatible itself. For biocompatible support materials can suitable biocompatible adhesives are selected and used. It can various pharmaceutical gelatins (5% -20% solutions) or fibrillated collagen be used. However, you have to they are not heated to fix, but cooled and then z. B. in a 1% EDC solution (N-dimethylaminopropyl-N-ethylcarbodiimide hydrochloride) in 80% Be crosslinked ethanol.
In
Eine
Dosiereinrichtung
Nachdem
in dem Behälter
Das
unverfestigte Fasermaterial
Mit
dem Mikrodosiersystem
Alternativ
zur Steuerung der Dosiereinrichtung
Die
Herstellung einer komplizierten dreidimensionalen Geometrie wird
mit Hilfe einer CNC-Steuerung des Behälters
In
der
Eine
weitere alternative Variante zur Verfestigung des Fasermaterials
ist in
Die
In
- 11
- Trägermaterialsupport material
- 22
- Schichtlayer
- 2.12.1
- unverfestigtes Fasermaterialunconsolidated fiber material
- 2.22.2
- verfestigtes Fasermaterialsolidified fiber material
- 33
- Dosiereinrichtungmetering
- 44
- Behältercontainer
- 55
- Nadelneedle
- 66
- Laserlaser
- 77
- Optikoptics
- 88th
- Brennpunktfocus
- 99
- Faserfiber
- 1010
- Mikrodosiersystemmicro-dosing system
- 1111
- Mechanikmechanics
- 1212
- Bindepunktbinding point
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Priority Applications (1)
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DE102005050560A DE102005050560A1 (en) | 2005-10-17 | 2005-10-17 | Support material useful as a scaffold material for reconstructive surgery comprises a nonwoven formed and strengthened from individual fibers according to a target three-dimensional geometry |
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DE102005050560A DE102005050560A1 (en) | 2005-10-17 | 2005-10-17 | Support material useful as a scaffold material for reconstructive surgery comprises a nonwoven formed and strengthened from individual fibers according to a target three-dimensional geometry |
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DE102005050560A1 true DE102005050560A1 (en) | 2007-04-19 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010081832A1 (en) * | 2009-01-13 | 2010-07-22 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Biomimetic nanofiber web and method and device to manufacture the same |
DE102009015791A1 (en) | 2009-03-23 | 2010-09-30 | Technische Universität Dresden | Method for the production of a three-dimensional carrier material for the reconstructive surgery with an open porous structure, comprises loosely applying fibers in several individual layers and connecting through binding stitches |
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DE2515970A1 (en) * | 1974-04-19 | 1975-10-30 | American Cyanamid Co | COMPACT FELT |
WO1999017817A1 (en) * | 1997-10-02 | 1999-04-15 | Gore Enterprise Holdings, Inc. | Self-cohering, continuous filament non-woven webs |
EP1038508A1 (en) * | 1999-03-20 | 2000-09-27 | Aesculap AG & Co. KG | Prosthetic patch, method for its manufacture and its use in surgery |
DE19959088A1 (en) * | 1999-12-08 | 2001-06-13 | Inst Textil & Faserforschung | Medical device, process for its manufacture and use |
DE20201966U1 (en) * | 2002-02-08 | 2002-05-08 | Pelz & Co Kg W | Cotton washer, in particular for cosmetic purposes |
DE10222896A1 (en) * | 2002-05-23 | 2003-12-11 | Biotissue Technologies Ag | Process for the production of a three-dimensional and flat tissue graft |
US20040156878A1 (en) * | 2003-02-11 | 2004-08-12 | Alireza Rezania | Implantable medical device seeded with mammalian cells and methods of treatment |
EP1457552A1 (en) * | 2003-03-13 | 2004-09-15 | Technische Universität Dresden | Carrier for tissue- and cell-culture for the preparation of implants and implant containing the carrier |
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2005
- 2005-10-17 DE DE102005050560A patent/DE102005050560A1/en not_active Ceased
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DE2515970A1 (en) * | 1974-04-19 | 1975-10-30 | American Cyanamid Co | COMPACT FELT |
WO1999017817A1 (en) * | 1997-10-02 | 1999-04-15 | Gore Enterprise Holdings, Inc. | Self-cohering, continuous filament non-woven webs |
EP1038508A1 (en) * | 1999-03-20 | 2000-09-27 | Aesculap AG & Co. KG | Prosthetic patch, method for its manufacture and its use in surgery |
DE19959088A1 (en) * | 1999-12-08 | 2001-06-13 | Inst Textil & Faserforschung | Medical device, process for its manufacture and use |
DE20201966U1 (en) * | 2002-02-08 | 2002-05-08 | Pelz & Co Kg W | Cotton washer, in particular for cosmetic purposes |
DE10222896A1 (en) * | 2002-05-23 | 2003-12-11 | Biotissue Technologies Ag | Process for the production of a three-dimensional and flat tissue graft |
US20040156878A1 (en) * | 2003-02-11 | 2004-08-12 | Alireza Rezania | Implantable medical device seeded with mammalian cells and methods of treatment |
EP1457552A1 (en) * | 2003-03-13 | 2004-09-15 | Technische Universität Dresden | Carrier for tissue- and cell-culture for the preparation of implants and implant containing the carrier |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010081832A1 (en) * | 2009-01-13 | 2010-07-22 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Biomimetic nanofiber web and method and device to manufacture the same |
DE102009015791A1 (en) | 2009-03-23 | 2010-09-30 | Technische Universität Dresden | Method for the production of a three-dimensional carrier material for the reconstructive surgery with an open porous structure, comprises loosely applying fibers in several individual layers and connecting through binding stitches |
DE102009015791B4 (en) * | 2009-03-23 | 2015-09-24 | Technische Universität Dresden | Support material for reconstructive surgery and process for its preparation |
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