DE202006015416U1 - Element to be used as replacement for damaged bone tissue, made of wire structure and pre-shaped for insertion - Google Patents
Element to be used as replacement for damaged bone tissue, made of wire structure and pre-shaped for insertion Download PDFInfo
- Publication number
- DE202006015416U1 DE202006015416U1 DE202006015416U DE202006015416U DE202006015416U1 DE 202006015416 U1 DE202006015416 U1 DE 202006015416U1 DE 202006015416 U DE202006015416 U DE 202006015416U DE 202006015416 U DE202006015416 U DE 202006015416U DE 202006015416 U1 DE202006015416 U1 DE 202006015416U1
- Authority
- DE
- Germany
- Prior art keywords
- augmentation component
- augmentation
- bone
- implant
- cavities
- 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.)
- Expired - Lifetime
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Classifications
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- 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
- A61F2/30721—Accessories
- A61F2/30734—Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
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- A—HUMAN NECESSITIES
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- 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
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- 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
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- A61F2/3094—Designing or manufacturing processes
- A61F2/30965—Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping
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- 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
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- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
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- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
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- 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
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- 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
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- A—HUMAN NECESSITIES
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- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/30004—Material 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
- A61F2002/30011—Material 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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- 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
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30112—Rounded shapes, e.g. with rounded corners
- A61F2002/30136—Rounded shapes, e.g. with rounded corners undulated or wavy, e.g. serpentine-shaped or zigzag-shaped
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- 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
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- 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
- A61F2002/30971—Laminates, i.e. layered products
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0004—Rounded shapes, e.g. with rounded corners
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
-
- 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
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0063—Three-dimensional shapes
- A61F2230/0069—Three-dimensional shapes cylindrical
-
- 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
- A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
- A61F2250/0023—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in porosity
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
-
- 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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00005—The prosthesis being constructed from a particular material
- A61F2310/00011—Metals or alloys
- A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Transplantation (AREA)
- Cardiology (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Physical Education & Sports Medicine (AREA)
- Manufacturing & Machinery (AREA)
- Prostheses (AREA)
Abstract
Description
Die Erfindung betrifft eine Augmentationskomponente für Knochenimplantate, insbesondere für Femur- oder Tibiaimplantate, mit einer metallischen, porösen Struktur und mit mindestens einer Öffnung für ein die Augmentationskomponente am Knochenimplantat festlegendes Befestigungselement.The The invention relates to an augmentation component for bone implants, especially for Femoral or tibial implants, with a metallic, porous structure and with at least one opening for a the augmentation component on the bone implant fixing fastener.
Bei der Implantation von Knochenimplantaten, die an Stelle des natürlichen Knochens in den Körper eingesetzt werden und Knochendefekte ausgleichen sollen, ergibt sich häufig das Problem, daß zwischen dem Knochenimplantat einerseits und dem natürlichen Knochen andererseits Defekträume verbleiben, die von dem Knochenimplantat nicht ausgefüllt und ersetzt werden können. Diese verbleibenden Knochendefekte müssen ausgefüllt werden, um eine ausreichende Stabilität zu erreichen und um das Knochenimplantat am Knochen vollflächig anlegen zu können.at implantation of bone implants in place of the natural ones Bone in the body used and compensate for bone defects, results often the problem that between the bone implant on the one hand and the natural bone on the other defective areas remain unfilled by the bone implant and can be replaced. These remaining bone defects need to be filled to a sufficient extent stability to achieve and to create the bone implant on the bone over the entire area can.
Es
ist bekannt, derartige Defekte zwischen einem Knochenimplantat und
dem Knochen durch massive, metallische Formkörper auszufüllen, sogenannte Augmentationskomponenten.
Diese können die
unterschiedlichsten Formen aufweisen, beispielsweise in Form von
Platten, Keilen, Zylindern etc. vorliegen, und sie können Öffnungen
aufweisen, durch die Befestigungsmittel, beispielsweise Schrauben, hindurchgreifen,
durch die diese Augmentationskomponenten an den entsprechenden Implantaten
festgelegt werden. (
Bei der Verwendung von Augmentationskomponenten, die aus einem metallischen Vollmaterial bestehen, kann in dem von ihnen eingenommenen Bereich keine Neubildung von Knochen einsetzen. Durch Osteolyse kann es sogar zu einer Defektvergrößerung kommen, und dies kann sich kritisch auf die Langzeitstabilität des Implantates auswirken.at the use of augmentation components consisting of a metallic Solid material can exist in the area occupied by them do not use any new bone. By osteolysis it can even come to a defect enlargement, and this can be critical to the long-term stability of the implant impact.
Neben diesen metallischen Augmentationskomponenten aus Vollmaterial werden zum Auffüllen knöcherner Defekte auch Knochenersatzmaterialien biologischen oder synthetischen Ursprungs verwendet. Bei der Verwendung von Materialien biologischen Ursprungs ist die schlechte Verfügbarkeit von Nachteil, außerdem bei autologen Implantaten die zusätzliche Belastung des Patienten durch Entnahme von Knochenmaterial aus einem anderen Körperteil. Es werden daher auch zunehmend synthetische, keramische oder metallische Knochenersatzmaterialien eingesetzt, die eine poröse Struktur aufweisen (Firmenprospekt The actipore.PLF System der Firma Biorthex, Inc., 2002). Bei den nichtmetallischen Augmentationskomponenten reicht häufig die Festigkeit im lasttragenden Bereich des Knochens nicht aus, und bei den metallischen porösen Augmentationskomponenten ergibt sich das Problem, daß bei ausreichender Festigkeit die Größe der Poren klein ist, da eine relativ große Wandstärke notwendig ist, um die mechanische Stabilität zu gewährleisten. Es steht daher nur sehr wenig Volumen für das Einwachsen des Knochens zur Verfügung.Next These metallic augmentation components are made of solid material to fill up bony Defects also bone replacement materials biological or synthetic Origin. When using materials biological Origin is the poor availability disadvantageous, as well For autologous implants, the additional burden on the patient by removing bone material from another body part. There are therefore increasingly synthetic, ceramic or metallic Bone replacement materials used that have a porous structure (Company prospectus The actipore.PLF System of Biorthex, Inc., 2002). For non-metallic augmentation components is enough the strength in the load-bearing area of the bone is not sufficient, and at the metallic porous ones Augmentation components results in the problem that when sufficient Firmness the size of the pores is small, since a relatively large Wall thickness necessary to ensure mechanical stability. It is therefore only very little volume for the ingrowth of the bone is available.
Es ist Aufgabe der Erfindung, eine gattungsgemäße Augmentationskomponente so auszugestalten, daß sie einerseits in hohem Maße lastverträglich ist und zum anderen große Volumina für das Einwachsen von Knochensubstanz zur Verfügung stellt.It It is an object of the invention to provide a generic augmentation component so that they on the one hand to a high degree is load-friendly and on the other hand great Volumes for provides the ingrowth of bone substance.
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 miteinander verbundene Hohlräume mit einer Größe zwischen 0,5 mm und 6 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 cavities with a size between 0.5 mm and 6 mm form.
Die Ausgestaltung eines dreidimensionalen Gerüstes aus miteinander verbundenen Stegen ermöglicht es, bei äußerst geringem Materialaufwand der Augmentationskomponente ein sehr stabiles Gerüst auszubilden, das auch hohe Lasten aufnehmen kann, das aber andererseits durch das Fehlen von durchgehenden Wänden und durch die Verwendung von Stegen nach Art eines Fachwerkes sehr viele Durchbrüche aufweist und somit auch relativ große Hohlräume ausbildet, die miteinander verbunden sind. Dieses fachwerkähnliche, dreidimensionale Gerüst bietet damit eine optimale Stützstruktur für die Auffüllung von Knochendefekten und bildet somit eine Leitschiene für das Einwachsen des Knochenmaterials, das den größten Teil des Defektes mit Knochensubstanz ausfüllen kann, da die metallischen Stege der Stützstruktur nur ein sehr geringes Volumen des Knochendefektes ausfüllen.The Design of a three-dimensional framework made of interconnected Stegen allows it, at extremely low Material expenditure of the augmentation component to form a very stable framework, which can also absorb high loads, but on the other hand by the absence of continuous walls and by the use of webs in the manner of a framework very many breakthroughs and thus also forms relatively large cavities, which together are connected. This truss-like, three-dimensional scaffolding thus offers an optimal support structure for the replenishment of Bone defects and thus forms a guide rail for ingrowth of the bone material, the largest part of the defect can fill with bone substance, since the metallic webs the support structure fill only a very small volume of the bone defect.
Die Stege können beispielsweise eine Dicke zwischen 0,2 mm und 2,5 mm aufweisen.The Stages can for example, have a thickness between 0.2 mm and 2.5 mm.
Die relative Dichte der Augmentationskomponente kann zwischen 0,05 und 0,5 liegen. Unter der relativen Dichte versteht man die Dichte des zellulären Materials geteilt durch die Dichte des Feststoffes, aus dem die Stege bestehen.The Relative density of the augmentation component can be between 0.05 and 0.5 lie. By relative density is meant the density of the cellular Material divided by the density of the solid from which the Bars exist.
Die Augmentationskomponente besteht aus einem körperverträglichen metallischen Werkstoff, beispielsweise aus Titan, einer Titanlegierung oder einer Kobaltlegierung.The Augmentation component consists of a biocompatible metallic material, for example titanium, a titanium alloy or a cobalt alloy.
Zusätzlich kann vorgesehen sein, daß die Stege mit einer Beschichtung versehen sind, beispielsweise mit einer resorbierbaren Kalzium-Phosphat-Schicht, die das Knochenwachstum stimuliert.In addition, it can be provided that the webs are provided with a coating at For example, with a resorbable calcium phosphate layer that stimulates bone growth.
Die Größe der Hohlräume innerhalb der Augmentationskomponente kann gleich sein, bei einer bevorzugten Ausführungsform ist jedoch vorgesehen, daß die Größe der Hohlräume innerhalb der Augmentationskomponente variiert.The Size of the cavities inside the augmentation component may be the same, in a preferred one embodiment However, it is envisaged that the Size of the cavities inside the augmentation component varies.
Dabei können über das gesamte Volumen der Augmentationskomponente Hohlräume unterschiedlicher Größe gleichmäßig verteilt sein, es ist aber auch möglich, daß sich die Größe der Hohlräume von einem Bereich der Augmentationskomponente zu einem anderen Bereich der Augmentationskomponente ändert. Dadurch ist es insbesondere möglich, die mechanischen Eigenschaften der Augmentationskomponente über ihr Volumen zu variieren, beispielsweise zur Anpassung der mechanischen Eigenschaften an die mechanischen Eigenschaften des benachbarten Knochenmaterials. Durch diese Anpassung kann vermieden werden, daß durch zu hohe Festigkeit der Augmentationskomponente das benachbarte Knochenmaterial durch Osteolyse geschädigt wird.there can about that entire volume of the augmentation component cavities different Size evenly distributed but it is also possible that yourself the size of the cavities of one area of the augmentation component to another area the augmentation component changes. This makes it possible in particular the mechanical properties of the augmentation component over it Volume to vary, for example, to adjust the mechanical Properties of the mechanical properties of the adjacent Bone material. By this adaptation can be avoided by Too high strength of the augmentation component of the adjacent bone material Osteolysis damaged becomes.
Die Größe der Hohlräume kann sich dabei beim Übergang von einem Bereich zu einem anderen Bereich allmählich oder auch sprunghaft ändern.The Size of the cavities can at the transition from one area to another area gradually or even skipily change.
Weiterhin ist es günstig, wenn die Augmentationskomponente im Bereich der Öffnung keine Hohlräume aufweist, sondern kompakt ausgebildet ist. Im Bereich der Öffnung, die der Festlegung der Augmentationskomponente an einem Implantat dient, beispielsweise durch eine die Öffnung durchsetzende Schraube, ergibt sich dadurch eine besonders hohe Festigkeit der Augmentationskomponente, die zu einer sicheren und unveränderbaren Festlegung der Augmentationskomponente an dem Implantat führt.Farther is it cheap if the augmentation component has no cavities in the region of the opening, but is compact. In the area of the opening, the laying down the augmentation component on an implant serves, for example through an opening penetrating screw, this results in a particularly high Strength of the augmentation component leading to a safe and unchangeable Fixing the augmentation leads to the implant.
Günstig ist es, wenn die Augmentationskomponente in ihren Außenabmessungen den Außenabmessungen des Knochenimplantates entspricht, an dem sie durch das Befestigungselement gehalten ist. Damit bildet die Augmentationskomponente eine Fortsetzung der Implantatteile in den jeweiligen Knochendefekt hinein.Cheap is it, if the augmentation component in its external dimensions the outside dimensions corresponds to the bone implant, to which it passes through the fastener is held. Thus, the augmentation component forms a continuation the implant parts into the respective bone defect.
Eine gitterartige Struktur, wie sie bei der beschriebenen Augmentationskomponente zu Anwendung kommt, kann an ihren Außenflächen ohne weiteres in beliebiger Form bearbeitet werden, so daß die Augmentationskomponente nicht nur an die Außenabmessungen des Knochenimplantats angepaßt werden kann, sondern auch an die genaue Struktur des auszufüllenden Knochendefektes.A lattice-like structure, as in the described augmentation component can be applied to their outer surfaces in any arbitrary Form are edited so that the Augmentation component not only to the outer dimensions of the bone implant be adjusted but also to the exact structure of the to be filled Bone defect.
Beispielsweise kann gemäß einer bevorzugten Ausführungsform die Augmentationskomponente plattenförmig ausgebildet sein als Unterlage für ein Tibiaplateau eines Tibiaimplantates.For example can according to a preferred embodiment the augmentation component may be plate-shaped as a base for a tibial plateau a tibial implant.
Die Erfindung bezieht sich auch auf ein Knochenimplantat, insbesondere ein Femur- oder Tibiaimplantat, welches mit einer Augmentationskomponente der vorstehend beschriebenen Art verbunden ist.The The invention also relates to a bone implant, in particular a femoral or tibial implant, which has an augmentation component of the type described above is connected.
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:
Die
Erfindung wird nachstehend am Beispiel eines Tibiaimplantats
Im
vorliegenden Ausführungsbeispiel
umfaßt das
Tibiaimplantat
An
der Unterseite des Tibiaplateaus
Die
Außenkontur
der Augmentationskomponente
Die
Höhe der
Augmentationskomponente
Die
Augmentationskomponente
Sie
ist aufgebaut aus einer Vielzahl von Stegen
Die
Stege können
dabei einen Durchmesser zwischen 0,2 mm und 2,5 mm aufweisen, ihre
Länge ist
so bemessen, daß die
Größe der von
ihnen ausgebildeten Hohlräume
zwischen 0,5 mm und 6 mm liegt. Es ist möglich, daß die Stege alle gleich groß und regelmäßig angeordnet
sind, so daß sich über das
Volumen der Augmentationskomponente eine gleichmäßige Verteilung von Hohlräumen gleicher Größe ergibt,
die Stege
Bei
dem in
In
einer Ebene sind eine Vielzahl derartiger Traversen
In gleicher Weise schließt sich darunter eine Ebene an, in der wieder senkrecht zu der darüberliegenden Ebene verlaufende Traversen angeordnet sind, die ebenfalls in gleicher Weise mit den darüberliegenden Traversen verbunden sind.In closes in the same way below it is a plane in which again perpendicular to the overlying Plane extending trusses are arranged, which are also in the same Way with the overlying ones Trusses are connected.
Man erhält auf diese Weise eine komplizierte und regelmäßige dreidimensionale Struktur, die unter 45° zu den jeweiligen Traversen betrachtet eine Wabenstruktur aufweist mit durchgehenden Kanälen mit einem Querschnitt in Form eines regelmäßigen Sechsecks.you receives in this way a complicated and regular three-dimensional structure, those below 45 ° to Viewed the respective trusses having a honeycomb structure with continuous channels with a cross section in the form of a regular hexagon.
Eine solche sehr komplizierte Struktur gibt der Augmentationskomponente eine große Festigkeit und erlaubt trotzdem ein vollständiges Durchwachsen mit Knochenmaterial, so daß die von Knochenmaterial durchwachsene Augmentationskomponente zum allergrößen Teil aus Knochenmaterial besteht, beispielsweise liegt der Anteil des Knochenmaterials dabei in der Größenordnung von 50% bis 95%, während das metallische Material der Augmentationskomponente nur bei 5% bis 50% liegt.A such very complicated structure gives the augmentation component a big Firmness and yet allows complete intergrowth with bone material, So that the bone augmented augmentation component to all-sized part is made of bone material, for example, the proportion of Bone material here in the order from 50% to 95% while the metallic material of the augmentation component only in 5% up to 50%.
Derartige komplexe Gitterstrukturen lassen sich beispielsweise mit einer Elektronenstrahl-Schmelzmethode schichtweise aufbauen, bei der mittels eines gesteuerten Elektronenstrahls Metallpulver schichtförmig an den Stellen aufgeschmolzen wird, an denen die Gitterstruktur durch die jeweilige Ebene hindurchläuft. Durch den schichtweisen Aufbau können auch sehr komplizierte Verläufe der Stege in der dreidimensionalen Struktur hergestellt werden, und der auf diese Weise entstehende Formkörper kann auch bereits an die Außenkontur des Implantates angepaßt werden.Such complex lattice structures can be built up in layers, for example, using an electron beam melting method in which metal powder is melted in layers at the points at which the lattice structure passes through the respective plane by means of a controlled electron beam. Due to the layered construction, very complicated progressions of the webs in the three-dimensional structure can be produced, and the resulting shape in this way Body can also be adapted to the outer contour of the implant.
Grundsätzlich ist es aber auch möglich, einen solchen Formkörper außenseitig nachzubearbeiten, um eine entsprechende Außenkontur zu erreichen.Basically but it is also possible such a shaped body externally rework to achieve a corresponding outer contour.
Während die
Augmentationskomponente
Durch
die Anpassung der Außenkontur
der Augmentationskomponente an die Außenkontur des Tibiaplateaus
erhält
man nach der Festlegung der Augmentationskomponente
Die
beschriebene komplexe dreidimensionale Gitterstruktur verleiht der
Augmentationskomponente
Claims (13)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006047663A DE102006047663A1 (en) | 2006-09-29 | 2006-09-29 | Augmentation component for bone implant is constructed on bone implant from connected bridges that form cavities between them of dimensions between 0.5 and 6 mm |
DE202006015416U DE202006015416U1 (en) | 2006-09-29 | 2006-09-29 | Element to be used as replacement for damaged bone tissue, made of wire structure and pre-shaped for insertion |
PCT/EP2007/006753 WO2008040408A1 (en) | 2006-09-29 | 2007-07-31 | Augmentation component for bone implants |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006047663A DE102006047663A1 (en) | 2006-09-29 | 2006-09-29 | Augmentation component for bone implant is constructed on bone implant from connected bridges that form cavities between them of dimensions between 0.5 and 6 mm |
DE202006015416U DE202006015416U1 (en) | 2006-09-29 | 2006-09-29 | Element to be used as replacement for damaged bone tissue, made of wire structure and pre-shaped for insertion |
Publications (1)
Publication Number | Publication Date |
---|---|
DE202006015416U1 true DE202006015416U1 (en) | 2006-11-30 |
Family
ID=39277017
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE202006015416U Expired - Lifetime DE202006015416U1 (en) | 2006-09-29 | 2006-09-29 | Element to be used as replacement for damaged bone tissue, made of wire structure and pre-shaped for insertion |
DE102006047663A Withdrawn DE102006047663A1 (en) | 2006-09-29 | 2006-09-29 | Augmentation component for bone implant is constructed on bone implant from connected bridges that form cavities between them of dimensions between 0.5 and 6 mm |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102006047663A Withdrawn DE102006047663A1 (en) | 2006-09-29 | 2006-09-29 | Augmentation component for bone implant is constructed on bone implant from connected bridges that form cavities between them of dimensions between 0.5 and 6 mm |
Country Status (2)
Country | Link |
---|---|
DE (2) | DE202006015416U1 (en) |
WO (1) | WO2008040408A1 (en) |
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WO2009022911A2 (en) * | 2007-08-16 | 2009-02-19 | Cam Implants B.V. | Prosthesis comprising an anti-micromotion bone-interfacing surface and method for the manufacture thereof |
WO2008146141A3 (en) * | 2007-05-29 | 2009-05-22 | Lima Lto Spa | Prosthetic element and relative method to make it |
RU172070U1 (en) * | 2016-10-31 | 2017-06-28 | Федеральное государственное бюджетное учреждение "Российский научный центр "Восстановительная травматология и ортопедия" имени академика Г.А. Илизарова" Минздрава России | COMBINED BIOIMPLANT |
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FR2932674B1 (en) | 2008-06-20 | 2011-11-18 | Tornier Sa | METHOD FOR MODELING A GLENOIDAL SURFACE OF AN OMOPLATE, DEVICE FOR IMPLANTING A GLENOIDAL COMPONENT OF A SHOULDER PROSTHESIS, AND METHOD FOR MANUFACTURING SUCH COMPOUND |
ES2555487T3 (en) | 2008-12-18 | 2016-01-04 | 4-Web, Inc. | Lattice lattice structure implant |
DE102010015099B4 (en) * | 2010-04-15 | 2016-03-17 | Advanced Medical Technologies Ag | Method for producing an implant |
US20110313532A1 (en) * | 2010-06-18 | 2011-12-22 | Jessee Hunt | Bone implant interface system and method |
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2006
- 2006-09-29 DE DE202006015416U patent/DE202006015416U1/en not_active Expired - Lifetime
- 2006-09-29 DE DE102006047663A patent/DE102006047663A1/en not_active Withdrawn
-
2007
- 2007-07-31 WO PCT/EP2007/006753 patent/WO2008040408A1/en unknown
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WO2009022911A2 (en) * | 2007-08-16 | 2009-02-19 | Cam Implants B.V. | Prosthesis comprising an anti-micromotion bone-interfacing surface and method for the manufacture thereof |
WO2009022911A3 (en) * | 2007-08-16 | 2009-06-11 | Cam Implants Bv | Prosthesis comprising an anti-micromotion bone-interfacing surface and method for the manufacture thereof |
RU172070U1 (en) * | 2016-10-31 | 2017-06-28 | Федеральное государственное бюджетное учреждение "Российский научный центр "Восстановительная травматология и ортопедия" имени академика Г.А. Илизарова" Минздрава России | COMBINED BIOIMPLANT |
Also Published As
Publication number | Publication date |
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WO2008040408A1 (en) | 2008-04-10 |
DE102006047663A1 (en) | 2008-04-03 |
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