DE102006047661A1 - Augmentation component e.g. for filling bone defects, has three-dimensional frame-work based on inter-joined webs - Google Patents

Augmentation component e.g. for filling bone defects, has three-dimensional frame-work based on inter-joined webs Download PDF

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Publication number
DE102006047661A1
DE102006047661A1 DE102006047661A DE102006047661A DE102006047661A1 DE 102006047661 A1 DE102006047661 A1 DE 102006047661A1 DE 102006047661 A DE102006047661 A DE 102006047661A DE 102006047661 A DE102006047661 A DE 102006047661A DE 102006047661 A1 DE102006047661 A1 DE 102006047661A1
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Germany
Prior art keywords
augmentation component
cavities
augmentation
size
component according
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Withdrawn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
DE102006047661A
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German (de)
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DE102006047661A8 (en
Inventor
Wilhelm Dipl.-Ing.(FH) Blömer
Richard Dr.-Ing. Dr. Zeller
Jens Dipl.-Ing. Schneider
Jens Dipl.-Ing.(Univ.) Beger
Patricia Dipl.-Ing. Graf
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.)
Aesculap AG
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Aesculap AG
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Filing date
Publication date
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Priority to DE102006047661A priority Critical patent/DE102006047661A1/en
Priority to DE202006015415U priority patent/DE202006015415U1/en
Priority to PCT/EP2007/006754 priority patent/WO2008040409A1/en
Publication of DE102006047661A1 publication Critical patent/DE102006047661A1/en
Publication of DE102006047661A8 publication Critical patent/DE102006047661A8/en
Withdrawn legal-status Critical Current

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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
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    • A61F2/3094Designing or manufacturing processes
    • A61F2/30965Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
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    • A61F2002/30011Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in porosity
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Abstract

An augmentation component (1) is structured from a three-dimensional framework (2) of inter-joined webs (3) which form inter-joined small cavities (4) having a size in the range from 0.5 mm to 6 mm, preferably 0.5 mm to 1 mm, and large cavities (6) with a size in the range from 6 mm to 20 mm, preferably from 6 mm to 10 mm.

Description

Die Erfindung betrifft eine Augmentationskomponente zur Auffüllung von Knochendefekten mit einer metallischen, porösen Struktur.The The invention relates to an augmentation component for replenishing Bone defects with a metallic, porous structure.

Es ist häufig notwendig, knöcherne Defekte durch eine sogenannte Augmentationskomponente zu überbrücken. Dabei handelt es sich um Formkörper, die in die knöchernen Defekte eingesetzt werden und die entweder als Vollmaterial das fehlende Knochenmaterial vollständig ersetzen ( US 6,387,131B1 ) oder die als poröses Material einerseits eine lasttragende Funktion übernehmen und andererseits das Einwachsen von Knochenmaterial in die Poren ermöglicht. Bekannt ist die Verwendung von Calciumphosphatkeramiken oder von resorbierbaren Polymeren, diese Substanzen haben jedoch nur eine relativ geringe Festigkeit, so daß sie nur beschränkt einsetzbar sind.It is often necessary to bridge bony defects by a so-called augmentation component. These are shaped bodies which are inserted into the bony defects and which either completely replace the missing bone material as a solid material ( US 6,387,131B1 ) or on the one hand, as a porous material take on a load-bearing function and on the other hand allows the ingrowth of bone material into the pores. The use of calcium phosphate ceramics or resorbable polymers is known, but these substances have only a relatively low strength, so that they are of limited use.

Andererseits ist es auch bekannt, metallische poröse Festkörper zu verwenden, um Knochendefekte zu überbrücken ( Firmenprospekt "The actipore PLF System", Firme Biorthex Inc., 2006 ). Dabei handelt es sich um schwammähnliche Materialien, die sehr kleine Poren aufweisen, was den vollständigen knöchernen Aufbau erschwert.On the other hand, it is also known to use metallic porous solids to bridge bone defects ( Company Prospectus "The actipore PLF System", Firme Biorthex Inc., 2006 ). These are sponge-like materials that have very small pores, which complicates the complete bony structure.

Es ist Aufgabe der Erfindung, eine gattungsgemäße Augmentationskomponente vorzuschlagen, die einerseits eine hohe Lasttragfähigkeit aufweist und die andererseits ein optimales Einwachsen von Knochenmaterial ermöglicht.It It is an object of the invention to provide a generic augmentation component to propose, on the one hand, a high load capacity On the other hand, an optimal ingrowth of bone material allows.

Diese Aufgabe wird bei einer Augmentationskomponente der eingangs beschriebenen Art erfindungsgemäß dadurch gelöst, daß die Augmentationskomponente aus einem dreidimensionalen Gerüst aus miteinander verbundenen Stegen aufgebaut ist, die untereinander verbundene kleine Hohlräume mit einer Größe in einem Bereich von 0,5 mm bis 6 mm einerseits, vorzugsweise von 0,5 mm bis 1 mm, und große Hohlräume mit einer Größe in einem Bereich von 6 mm bis 20 mm andererseits, vorzugsweise von 6 mm bis 10 mm, ausbilden.These Task is in an augmentation of the above-described Type according to the invention thereby solved, that the Augmentation component of a three-dimensional framework of each other connected webs is constructed, the interconnected small Cavities with one size in one Range of 0.5 mm to 6 mm on the one hand, preferably 0.5 mm to 1 mm, and large cavities with one size in one Range from 6 mm to 20 mm on the other hand, preferably from 6 mm to 10 mm, training.

Die kleinen Hohlräume gewährleisten eine ausreichende Festigkeit des Formkörpers, während die großen Hohlräume dazu dienen, in ihnen Knochenmaterial zu deponieren, beispielsweise autologes oder homologes Knochenmaterial. Ausgehend von diesen mit Knochenmaterial gefüllten großen Hohlräumen und von der Kontaktfläche zu den überbrückten Knochen kann das Knochenwachstum in die kleinen Hohlräume hinein erfolgen, so daß auch im Volumen des Augmentationskörpers eine größere Anzahl von Knochenwachstumszentren vorliegen, von denen aus das Knochenwachstum in die umgebenden kleinen Hohlräume erfolgen kann. Dies Kombination von kleinen Hohlräumen, die der Sicherstellung der Festigkeit dienen, und großen Hohlräumen, die als Vorratsvolumina Ausgangsstellen für das Knochenwachstum sind, führt zu einem deutlich schnelleren Durchwachsen des gesamten Gerüstes mit Knochenmaterial gegenüber Augmentationskörpern, bei denen das Einwachsen des Knochenmaterials ausschließlich von den Grenzflächen aus erfolgen kann.The small cavities guarantee a sufficient strength of the molding, while the large cavities serve to deposit bone material in them, for example, autologous or homologous bone material. Starting with these with bone material filled large cavities and from the contact surface to the bridged bones Bone growth can take place in the small cavities, so that in the Volume of the augmentation body A larger number of bone growth centers, from which bone growth into the surrounding small cavities can be done. This combination of small cavities that to ensure the firmness, and large cavities that as storage volumes are starting points for bone growth, leads to a significantly faster growing through the entire framework with Bone material opposite Augmentationskörpern, in which the ingrowth of the bone material exclusively by the interfaces can be done from.

Die Stege des Gerüstes können dabei eine Dicke in einem Bereich von 0,2 mm bis 2,5 mm aufweisen.The Webs of the scaffold can thereby have a thickness in a range of 0.2 mm to 2.5 mm.

Günstig ist es, wenn die relative Dichte der Augmentationskörper in einem Bereich von 0,05 bis 0,5 liegt. Durch den Aufbau des Gerüstes aus einzelnen Stegen ist der Volumenanteil des Gerüstmaterials gegenüber dem Volumenanteil der Hohlräume außerordentlich gering, und trotzdem läßt sich ein hohe Festigkeit erreichen. Es ist dadurch mit anderen Worten möglich, den größten Teil des Knochendefektes nach dem Einwachsen mit Knochenmaterial aufzufüllen und nicht mit dem Fremdmaterial der Augmentationskomponente.Cheap is it, if the relative density of the augmentation body in a range of 0.05 to 0.5. By building the framework of individual webs is the volume fraction of the framework material across from the volume fraction of the cavities extraordinarily small, and still can be achieve high strength. It is in other words possible, the biggest part fill the bone defect after ingrowth with bone material and not with the foreign material of the augmentation component.

Die Augmentationskomponente kann vorzugsweise aus Titan, einer Titanlegierung oder einer Cobaltlegierung bestehen.The Augmentation component may preferably be titanium, a titanium alloy or a cobalt alloy.

Es ist auch möglich, daß die Stege mit einer Beschichtung versehen sind, beispielsweise mit einer Calciumphosphatbeschichtung, die das Knochenwachstum und die Verbindung mit den Stegen fördert.It is possible, too, that the Webs are provided with a coating, for example with a Calcium phosphate coating, the bone growth and the compound promotes with the webs.

Die Größe der kleinen Hohlräume kann für das gesamte Volumen gleich sein, es ist aber auch möglich, daß die Größe der kleinen Hohlräume innerhalb der Augmentationskomponente variiert.The Size of the small cavities can for that Whole volume may be the same, but it is also possible that the size of the small cavities within the augmentation component varies.

Dabei kann sich die Größe der kleinen Hohlräume von einem Bereich der Augmentationskomponente zu einem anderen Bereich der Augmentationskomponente ändern, so daß auch die mechanische Festigkeit sich von Bereich zu Bereich ändert und optimal an den angrenzenden Knochen angepaßt werden kann.there can be the size of the small cavities from one area of the augmentation component to another area change the augmentation component, so that too the mechanical strength varies from area to area and can be optimally adapted to the adjacent bone.

Beispielsweise kann vorgesehen sein, daß sich die Größe der kleinen Hohlräume beim Übergang von einem Bereich zu einem anderen Bereich allmählich ändert, aber auch eine sprunghafte Änderung ist möglich.For example can be provided that the size of the small ones cavities at the transition gradually changing from one area to another area, but also a jumpy change is possible.

Es ist vorteilhaft, wenn ein einzelner großer Hohlraum oder eine Gruppe von mehreren großen Hohlräumen jeweils von kleinen Hohlräumen umgeben sind, so daß das Knochenwachstum ausgehend von den großen Hohlräumen nach allen Seiten in die kleinen Hohlräume hinein erfolgt. Dabei kann der Anteil der kleinen Hohlräume am Gesamtvolumen der Augmentationskomponente in einem Bereich von 50% bis 99%, vorzugsweise von 50% bis 90%, liegen, das heißt der größte Anteil des Volumens der Augmentationskomponente wird von kleinen Hohlräumen eingenommen, zwischen die großen Hohlräume eingelagert sind.It is advantageous if a single large cavity or a group of several large cavities are each surrounded by small cavities, so that the bone growth starting from the large cavities in all directions in the small cavities into it. In this case, the proportion of small cavities in the total volume of the augmentation component in a range of 50% to 99%, preferably from 50% to 90%, lie, that is, the largest proportion of the volume of the augmentation component is occupied by small cavities between the large cavities are stored.

Die großen Hohlräume können allseits von kleinen Hohlräumen umgeben sein, es ist aber auch möglich, daß die großen Hohlräume die Augmentationskomponente kanalförmig durchsetzen, in diesem Falle wird als Größe der Hohlräume deren Durchmesser angenommen. In diesem Falle kann das Knochenmaterial besonders einfach in die großen Hohlräume eingefüllt werden, außerdem kann durch diese großen Hohlräume von der Außenseite her besonders günstig verstärktes Knochenwachstum erfolgen.The huge cavities can on all sides of small cavities be surrounded, but it is also possible that the huge cavities enforce the augmentation channel-shaped, in this case is called the size of the cavities Diameter assumed. In this case, the bone material especially easy in the big ones cavities filled be, as well can through this great cavities from the outside especially favorable reinforced Bone growth done.

Die nachfolgende Beschreibung bevorzugter Ausführungsformen der Erfindung dient im Zusammenhang mit der Zeichnung der näheren Erläuterung. Es zeigen:The following description of preferred embodiments of the invention used in conjunction with the drawings for further explanation. Show it:

1: eine schematische Ansicht einer Augmentationskomponente mit einer gitterförmigen Struktur mit kleinen und großen Hohlräumen und 1 FIG. 2: a schematic view of an augmentation component with a lattice-shaped structure with small and large cavities and

2: eine vergrößerte Detailansicht der Gitterstruktur im Bereich der kleinen Hohlräume. 2 : an enlarged detail view of the lattice structure in the area of the small cavities.

Die in der Zeichnung dargestellte Augmentationskomponente 1 kann eine unterschiedliche äußere Form haben entsprechend der Form und der Größe des Knochendefektes, der von der Augmentationskomponente 1 ausgefüllt werden soll. Dabei ist es möglich, entweder vorgegebene Formen zu verwenden, beispielsweise Würfel, Quader, Platten, Zylinder, Keile etc., es ist aber auch möglich, die Augmentationskomponente 1 vor dem Einsetzen entsprechend der Form und der Größe des zu überbrückenden Knochendefektes zu formen und zwar durch Abschneiden eines entsprechend geformten und dimensionierten Formstückes von einem größeren Materialstück dieser Ausgestaltung.The augmentation component shown in the drawing 1 may have a different external shape according to the shape and size of the bone defect, that of the augmentation component 1 should be completed. It is possible to use either predetermined shapes, such as cubes, cuboids, plates, cylinders, wedges, etc., but it is also possible, the augmentation component 1 to form prior to insertion according to the shape and size of the bone defect to be bridged by cutting a correspondingly shaped and dimensioned fitting of a larger piece of material of this embodiment.

Im dargestellten Ausführungsbeispiel hat die Augmentationskomponente 1 die Gestalt eines Quaders.In the illustrated embodiment, the augmentation component 1 the shape of a cuboid.

Aufgebaut ist die Augmentationskomponente 1 als dreidimensionale Gitterkonstruktion aus Stegen 3, die gemeinsam ein dreidimensionales Gerüst 2 aufbauen. Die Stege 3 haben dabei eine Dicke zwischen 0,2 mm und 2,5 mm und eine Länge, die so bemessen ist, daß die Stege kleine Hohlräume 4 mit einer Größe zwischen 0,5 mm und 6 mm ausbilden. Die Hohlräume können dabei regelmäßig oder unregelmäßig geformt sein, mit dem Ausdruck "Größe" wird der größte Abstand von Eckpunkten des Hohlraumes bezeichnet, an dem sich Stege 3 treffen.The augmentation component is built up 1 as a three-dimensional grid construction from webs 3 , which together form a three-dimensional framework 2 build up. The bridges 3 have a thickness between 0.2 mm and 2.5 mm and a length which is dimensioned so that the webs small cavities 4 with a size between 0.5 mm and 6 mm. The cavities can be regularly or irregularly shaped, with the term "size" is the largest distance from vertices of the cavity referred to at the webs 3 to meet.

Die Stege 3 können geradlinig oder auch gebogen ausgebildet sein, sie sind an Kreuzungspunkten miteinander verbunden und bilden so ein formstabiles dreidimensionales Gerüst aus, das jedoch am Gesamtvolumen der Augmentationskomponente 1 nur einen Anteil in einem Bereich von 5% bis 50% hat.The bridges 3 may be formed straight or curved, they are connected to each other at intersections and thus form a dimensionally stable three-dimensional framework, but the total volume of the augmentation component 1 only has a share in a range of 5% to 50%.

Die Abmessungen der Stege können über das gesamte Volumen gleich sein und auch die Anordnung kann regelmäßig sein, so daß sich gleich große kleine Hohlräume 4 ergeben. Es ist aber auch möglich, daß unterschiedliche Längen und/oder Anordnungen der Stege gewählt werden, so daß sich kleine Hohlräume 4 unterschiedlicher Größe ergeben, die entweder gleichmäßig über das gesamte Volumen verteilt sind oder die ihre Größe von Bereich zu Bereich ändern, sei es allmählich, sei es sprunghaft.The dimensions of the webs can be the same over the entire volume and also the arrangement can be regular, so that the same size small cavities 4 result. But it is also possible that different lengths and / or arrangements of the webs are selected so that small cavities 4 different sizes, which are either evenly distributed over the entire volume or change their size from area to area, be it gradually, be it leaps and bounds.

Im dargestellten Ausführungsbeispiel ist eine Anordnung mit gleich langen geradlinigen Stegen 3 dargestellt, die im gesamten Volumen regelmäßig angeordnet sind, so daß alle kleinen Hohlräume 4 gleich groß sind und gleiche Formen aufweisen. Bei dem dargestellten Ausführungsbeispiel sind in einer Ebene des Gerüstes 2 nebeneinander und parallel zueinander verlaufend eine Anzahl von Querträgern 5 angeordnet, wobei jeder Querträger 5 aus aneinander anschließenden Stegen 3 gebildet wird, die abwechselnd 120° nach oben und 120° nach unten gegenüber den benachbarten Stegen 3 geneigt sind. Jeder Querträger 5 ist dadurch in aneinander anschließende Abschnitte unterteilt, die jeweils von einem Steg 3 gebildet werden, und die gegenüber der Ebene abwechselnd um 30° ansteigen und dann wieder um 30° abfallen.In the illustrated embodiment, an arrangement with the same length straight webs 3 represented, which are regularly arranged in the entire volume, so that all small cavities 4 are the same size and have the same shape. In the illustrated embodiment are in a plane of the scaffold 2 side by side and parallel to each other extending a number of cross members 5 arranged, with each cross member 5 from adjoining bars 3 is formed, alternately 120 ° up and 120 ° down from the adjacent bars 3 are inclined. Each cross member 5 is thereby divided into adjoining sections, each of which is a bridge 3 are formed, and the opposite to the plane alternately rise by 30 ° and then fall again by 30 °.

In der Ebene darunter ist die gleiche Anordnung von Querträgern 5 vorgesehen, jedoch läuft die Längsrichtung der Querträger in der darunterliegenden Ebene senkrecht zu der Längsrichtung der Querträger in der darüberliegenden Ebene. Die Anordnung ist dabei so gewählt, daß die jeweils tiefsten Punkte der Querträger 5 in der oberen Ebene die jeweils höchsten Punkte der querverlaufenden Querträger 5 in der darunterliegenden Ebene berühren, im Berührungsbereich sind die Querträger beider Ebenen miteinander verbunden. In der unter diesen beiden Ebenen angeordneten Ebene verlaufen gleich ausgebildete Querträger 5 wieder parallel zu denen in der obersten Ebene, allerdings seitlich um einen halben Abstand der Querträger versetzt zur oberen Ebene, so daß die obersten Punkte der Querträger 5 in der untersten Ebene an den unteren Punkten der Querträger in der mittleren Ebene anliegen und dort mit diesen verbunden sind. Diese Anordnung mit quer zueinander verlaufenden und seitlich jeweils um einen halben Querträgerabstand versetzten Querträgern setzt sich fort.In the plane below is the same arrangement of cross members 5 provided, however, runs the longitudinal direction of the cross member in the underlying plane perpendicular to the longitudinal direction of the cross member in the overlying plane. The arrangement is chosen so that the respective lowest points of the cross member 5 in the upper level, the highest points of the transverse cross member 5 touch in the underlying level, in the contact area, the cross members of both levels are interconnected. In the plane arranged under these two levels run the same trained cross member 5 again parallel to those in the top level, but laterally offset by half the distance of the cross member to the upper level, so that the uppermost points of the cross member 5 lie in the lowest level at the lower points of the cross member in the middle level and are connected there with these. This arrangement with transverse to each other and laterally offset by half a cross member spacing cross members continues.

Man erhält dabei eine regelmäßige Struktur, die unter einer Richtung von 45° zur Längsrichtung der Querträger in aufeinanderfolgenden Ebenen eine Wabenstruktur aufweist, also eine Struktur mit dem Querschnitt eines regelmäßigen Sechseckes.you receives doing a regular structure, the under a direction of 45 ° to Longitudinal direction of crossbeam has in successive levels a honeycomb structure, ie a structure with the cross section of a regular hexagon.

Eine solche Struktur weist ausgezeichnete Lasttrageeigenschaften auf und ein sehr geringes Volumen der Stege gemessen am Gesamtvolumen.A such structure has excellent load bearing properties and a very small volume of the bars measured on the total volume.

Die geschilderte Struktur des Gerüstes bildet den Grundaufbau der in der Zeichnung dargestellten Augmentationskomponente 1. Zusätzlich sind im Volumen der Augmentationskomponente 1 noch große Hohlräume 6 angeordnet, deren Größe in einem Bereich von 6 mm bis 20 mm liegt. Es kann sich dabei um durchgehende Kanäle handeln, wie dies im Ausführungsbeispiel der 1 dargestellt ist, oder aber auch um allseits von kleinen Hohlräumen 4 umgebene Hohlräume, die durch abweichende Länge und Anordnung der Stege 3 erzeugt werden. Die Kanäle hingegen können entweder in derselben Weise erzeugt werden oder aber auch nachträglich durch Anbringung einer Bohrung, die das Gerüst 2 durchsetzt.The described structure of the framework forms the basic structure of the augmentation component shown in the drawing 1 , In addition, in the volume of the augmentation component 1 still large cavities 6 arranged whose size is in a range of 6 mm to 20 mm. It may be continuous channels, as in the embodiment of 1 is shown, but also around all sides of small cavities 4 surrounded cavities caused by deviating length and arrangement of the webs 3 be generated. The channels, however, can be generated either in the same way or subsequently by attaching a hole that the framework 2 interspersed.

In jedem Fall werden zwischen einem oder mehreren großen Hohlräumen 6 und den sie umgebenden kleinen Hohlräumen 4 Grenzflächen ausgebildet, die offen sind und somit einen Übergang von Material aus den großen Hohlräumen 6 in die kleinen Hohlräume 4 ermöglichen.In any case, between one or more large cavities 6 and the surrounding small cavities 4 Formed interfaces that are open and thus a transition of material from the large cavities 6 in the small cavities 4 enable.

Die großen Hohlräume 6 dienen der Aufnahme von Knochenmaterial 7, dabei kann es sich um autologes oder homologes Knochenmaterial handeln. Dieses wird durch geeignete Instrumente, beispielsweise in Form von Spritzen, in die großen Hohlräume 6 eingefüllt und kann nach dem Einsetzen der Augmentationskomponente 1 in den Knochendefekt von diesen großen Hohlräumen 6 aus in die umgebenden kleinen Hohlräume 4 hinein wachsen. Dadurch wird das Einwachsen von Knochenmaterial nicht nur von den Außenflächen der Augmentationskomponente 1 eingeleitet, sondern auch von den über das Volumen der Augmentationskomponente 1 verteilten großen Hohlräumen 6 aus. Diese Anordnung führt dazu, daß auch größere Defekte schnell, vollständig und gleichmäßig mit Knochenmaterial durchbaut werden können.The big cavities 6 serve to accommodate bone material 7 , it may be autologous or homologous bone material. This is by suitable instruments, for example in the form of syringes, in the large cavities 6 filled in and can after insertion of the augmentation component 1 in the bone defect of these large cavities 6 out into the surrounding small cavities 4 grow into it. As a result, the ingrowth of bone material becomes not only from the outer surfaces of the augmentation component 1 but also from the about the volume of the augmentation component 1 distributed large cavities 6 out. This arrangement means that even larger defects can be built through bone material quickly, completely and evenly.

Die Stege der beschriebenen Augmentationskomponente 1 bestehen aus Metall, vorzugsweise aus Titan oder einer Titanlegierung, beispielsweise Ti6Al4V, oder einer Cobaltlegierung, und die Herstellung der komplizierten Gitterstruktur kann beispielsweise mittels eines Elektronenstrahlschmelzverfahrens erfolgen, bei dem Metallpulver schichtweise entsprechend der jeweils gewünschten Struktur durch den Elektronenstrahl dort aufgeschmolzen wird, wo in der jeweils bearbeiteten Schicht Teile des Gerüstes angeordnet werden sollen. Durch schichtweises Aufbauen des Gerüstes 2 in dieser Weise lassen sich auch sehr komplizierte Strukturen des Gitters realisieren, wobei die aufgeschmolzenen Metallbereiche nach dem Erstarren ein einstückiges Gitterstück mit hohen Festigkeitswerten ausbilden. Dieses Gitterstück kann außenseitig auch intraoperativ auf die geeignete Form gebracht werden, da die einzelnen Stege gekürzt werden können, so daß die Außenflächen entsprechend der gewünschten Form bearbeitet werden können.The webs of the described augmentation component 1 consist of metal, preferably titanium or a titanium alloy, for example Ti6Al4V, or a cobalt alloy, and the complicated lattice structure can be produced, for example, by means of an electron beam melting process, wherein the metal powder is melted layer by layer according to the respective desired structure by the electron beam, where in the each processed layer parts of the framework should be arranged. By layering the scaffolding 2 In this way, very complicated structures of the grid can be realized, wherein the molten metal areas after solidification form a one-piece lattice piece with high strength values. This lattice piece can be externally also intraoperatively brought to the appropriate shape, since the individual webs can be shortened so that the outer surfaces can be processed according to the desired shape.

Die einzelnen Stege des Gerüstes können zusätzlich beschichtet werden, beispielsweise mit einer Calciumphosphatbeschichtung, die das Einwachsen von Knochensubstanz erleichtert und somit zu einer innigen Verbindung der eingewachsenen Knochensubstanz und des Gerüstes 2 führt. Die mechanischen Eigenschaften des Gerüstes 2 können durch geeignete Größe der kleinen Hohlräume 4 und durch geeignete Anordnung der Stege 3 so eingestellt werden, daß sie den mechanischen Eigenschaften des benachbarten Knochenmaterials entsprechen, so daß eine Osteolyse aufgrund zu hoher Festigkeitswerte der Augmentationskomponente 1 entgegengewirkt werden kann. Dabei spielt selbstverständlich auch die Anordnung und die Größe der großen Hohlräume 6 eine Rolle, die so groß und so in der Augmentationskomponente 1 verteilt ausgebildet werden, daß einerseits die gewünschte mechanische Festigkeit erreicht wird und daß andererseits das Einwachsen von Knochenmaterial von möglichst vielen Zentren aus gefördert wird, um auf diese Weise eine rasche und gleichmäßige Ausbreitung des Knochenmaterials im gesamten Volumen der Augmentationskomponente 1 zu erreichen.The individual webs of the framework can be additionally coated, for example with a calcium phosphate coating, which facilitates the ingrowth of bone substance and thus to an intimate connection of the ingrown bone substance and the framework 2 leads. The mechanical properties of the scaffold 2 can by suitable size of the small cavities 4 and by suitable arrangement of the webs 3 be adjusted so that they correspond to the mechanical properties of the adjacent bone material, so that an osteolysis due to high strength values of the augmentation component 1 can be counteracted. It goes without saying that the arrangement and the size of the large cavities plays 6 a role that is so big and so in the augmentation component 1 be formed distributed, on the one hand, the desired mechanical strength is achieved and, on the other hand, the ingrowth of bone material from as many centers is promoted to in this way a rapid and uniform spread of the bone material throughout the volume of the augmentation 1 to reach.

Claims (12)

Augmentationskomponente zur Auffüllung von Knochendefekten mit einer metallischen, porösen Struktur, dadurch gekennzeichnet, daß die Augmentationskomponente (1) aus einem dreidimensionalen Gerüst (2) aus miteinander verbundenen Stegen (3) aufgebaut ist, die untereinander verbundene kleine Hohlräume (4) mit einer Größe in einem Bereich von 0,5 mm bis 6 mm einerseits, vorzugsweise von 0,5 mm bis 1 mm, und große Hohlräume (6) mit einer Größe im Bereich von 6 mm bis 20 mm andererseits, vorzugsweise von 6 mm bis 10 mm, ausbilden.Augmentation component for filling bone defects with a metallic, porous structure, characterized in that the augmentation component ( 1 ) from a three-dimensional framework ( 2 ) of interconnected webs ( 3 ), the interconnected small cavities ( 4 ) having a size in a range of 0.5 mm to 6 mm on the one hand, preferably from 0.5 mm to 1 mm, and large cavities ( 6 ) with a size in the range of 6 mm to 20 mm on the other hand, preferably from 6 mm to 10 mm. Augmentationskomponente nach Anspruch 1, dadurch gekennzeichnet, daß die Stege (3) eine Dicke im Bereich von 0,2 mm bis 2,5 mm aufweisen.Augmentation component according to claim 1, characterized in that the webs ( 3 ) have a thickness in the range of 0.2 mm to 2.5 mm. Augmentationskomponente nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die relative Dichte der Augmentationskomponente in einem Bereich von 0,05 bis 0,5 liegt.Augmentation component according to one of claims 1 or 2, characterized in that the relative density of the augmentation component in a range of 0.05 to 0.5. Augmentationskomponente nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Augmentationskomponente aus Titan, einer Titanlegierung oder einer Cobaltlegierung besteht.Augmentation component according to one of the preceding Claims, characterized in that the Augmentation component of titanium, a titanium alloy or a Cobalt alloy exists. Augmentationskomponente nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Stege (3) mit einer Beschichtung versehen sind.Augmentation component according to one of the preceding claims, characterized in that the webs ( 3 ) are provided with a coating. Augmentationskomponente nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die Größe der kleinen Hohlräume (4) innerhalb der Augmentationskomponente (1) variiert.Augmentation component according to one of the preceding claims, characterized in that the size of the small cavities ( 4 ) within the augmentation component ( 1 ) varies. Augmentationskomponente nach Anspruch 6, dadurch gekennzeichnet, daß sich die Größe der kleinen Hohlräume (4) von einem Bereich der Augmentationskomponente (1) zu einem anderen Bereich der Augmentationskomponente (1) ändert.Augmentation component according to claim 6, characterized in that the size of the small cavities ( 4 ) of a region of the augmentation component ( 1 ) to another area of the augmentation component ( 1 ) changes. Augmentationskomponente nach Anspruch 7, dadurch gekennzeichnet, daß sich die Größe der kleinen Hohlräume (4) beim Übergang von einem Bereich zu einem anderen Bereich allmählich ändert.Augmentation component according to claim 7, characterized in that the size of the small cavities ( 4 ) gradually changes as you move from one area to another. Augmentationskomponente nach Anspruch 7, dadurch gekennzeichnet, daß sich die Größe der kleinen Hohlräume (4) beim Übergang von einem Bereich zu einem anderen Bereich sprunghaft ändert.Augmentation component according to claim 7, characterized in that the size of the small cavities ( 4 ) changes abruptly during the transition from one area to another area. Augmentationskomponente nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß ein einzelner großer Hohlraum (6) oder eine Gruppe von mehreren großen Hohlräumen (6) jeweils von kleinen Hohlräumen (4) umgeben sind.Augmentation component according to one of the preceding claims, characterized in that a single large cavity ( 6 ) or a group of several large cavities ( 6 ) each of small cavities ( 4 ) are surrounded. Augmentationskomponente nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß der Anteil der kleinen Hohlräume (4) am Gesamtvolumen der Augmentationskomponente (1) in einem Bereich von 50% bis 99% liegt.Augmentation component according to one of the preceding claims, characterized in that the proportion of small cavities ( 4 ) on the total volume of the augmentation component ( 1 ) ranges from 50% to 99%. Augmentationskomponente nach einem der voranstehenden Ansprüche, dadurch gekennzeichnet, daß die großen Hohlräume (6) die Augmentationskomponente (1) kanalförmig durchsetzen.Augmentation component according to one of the preceding claims, characterized in that the large cavities ( 6 ) the augmentation component ( 1 ) penetrate channel-shaped.
DE102006047661A 2006-09-29 2006-09-29 Augmentation component e.g. for filling bone defects, has three-dimensional frame-work based on inter-joined webs Withdrawn DE102006047661A1 (en)

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DE102006047661A DE102006047661A1 (en) 2006-09-29 2006-09-29 Augmentation component e.g. for filling bone defects, has three-dimensional frame-work based on inter-joined webs
DE202006015415U DE202006015415U1 (en) 2006-09-29 2006-09-29 Element to be used as replacement for damaged bone tissue, made of several layers of grids and provided with large openings
PCT/EP2007/006754 WO2008040409A1 (en) 2006-09-29 2007-07-31 Augmentation component for filling in bone defects

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DE202006015415U DE202006015415U1 (en) 2006-09-29 2006-09-29 Element to be used as replacement for damaged bone tissue, made of several layers of grids and provided with large openings

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