DE202009017789U1 - Device for posterior stabilization of the thoracolumbar spine - Google Patents

Device for posterior stabilization of the thoracolumbar spine Download PDF

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Publication number
DE202009017789U1
DE202009017789U1 DE202009017789U DE202009017789U DE202009017789U1 DE 202009017789 U1 DE202009017789 U1 DE 202009017789U1 DE 202009017789 U DE202009017789 U DE 202009017789U DE 202009017789 U DE202009017789 U DE 202009017789U DE 202009017789 U1 DE202009017789 U1 DE 202009017789U1
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abrasion
carbon composite
composite rod
resistant material
material layer
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ORTHOBION GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
    • B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
    • B60R21/20—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components
    • B60R21/203—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns
    • B60R21/2035—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit
    • B60R21/2037—Arrangements for storing inflatable members in their non-use or deflated condition; Arrangement or mounting of air bag modules or components in steering wheels or steering columns using modules containing inflator, bag and cover attachable to the steering wheel as a complete sub-unit the module or a major component thereof being yieldably mounted, e.g. for actuating the horn switch or for protecting the driver in a non-deployment situation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A61B17/7005—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/02—Inorganic materials
    • A61L31/022—Metals or alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/08—Materials for coatings
    • A61L31/10—Macromolecular materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
    • A61L31/12—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material
    • A61L31/121—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix
    • A61L31/122—Composite materials, i.e. containing one material dispersed in a matrix of the same or different material having an inorganic matrix of carbon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/12—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type
    • F01C1/123—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type with tooth-like elements, extending generally radially from the rotor body cooperating with recesses in the other rotor, e.g. one tooth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C11/00—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type
    • F01C11/002—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
    • F01D1/34—Non-positive-displacement machines or engines, e.g. steam turbines characterised by non-bladed rotor, e.g. with drilled holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/02—Adaptations for driving vehicles, e.g. locomotives
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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
    • A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/10—Fluid working
    • F04C2210/1077—Steam
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/70—Application in combination with
    • F05D2220/72—Application in combination with a steam turbine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2250/00—Geometry
    • F05D2250/40—Movement of components
    • F05D2250/41—Movement of components with one degree of freedom
    • F05D2250/411—Movement of components with one degree of freedom in rotation

Abstract

Vorrichtung zur dorsalen Stabilisierung der thorakolumbalen Wirbelsäule mit wenigstens einer polyaxialen oder monoaxialen in das Wirbelpedikel eingebrachten Schraube (5), vorzugsweise aus Titan, an deren Kopf (6) eine Klemmschraube (7) vorgesehen ist, welche einen eingelegten Carbon-Composite-Stab (2) mittels Klemmen fixiert, dadurch gekennzeichnet, dass wenigstens am Klemmbereich (3) von Klemmschraube (7) und Carbon-Composite-Stab (2) eine abriebfeste Materialschicht (1) vorgesehen ist.Device for the dorsal stabilization of the thoracolumbar spine with at least one polyaxial or monoaxial screw (5), preferably made of titanium, introduced into the vertebral pedicle, on the head (6) of which a clamping screw (7) is provided, which comprises an inserted carbon composite rod (2 ) fixed by means of clamps, characterized in that at least on the clamping region (3) of clamping screw (7) and carbon composite rod (2) an abrasion-resistant material layer (1) is provided.

Figure 00000001
Figure 00000001

Description

Die Erfindung befasst sich mit einer Vorrichtung zur dorsalen Stabilisierung der thorakolumbalen Wirbelsäule. Hierzu gibt es ein modulares System, welches ein Carbon-Composite-Stabsystem und polyaxiale und monoaxiale Titan-Schrauben umfasst. Kohlenstofffaserverstärkte Kunststoffe, wie ein Carbon-Composite-Stab, werden in der Medizintechnik insbesondere dort eingesetzt, wo hohe mechanische Festigkeiten, ein lastverteilendes Design und Röntgentransparenz gefordert werden. Bei einer solchen bekannten Vorrichtung wird in das Wirbelpedikel eine vorzugsweise aus Titan bestehende Schraube eingebracht, an deren Kopf eine Klemmschraube vorgesehen ist, welche einen eingelegten Carbon-Composite-Stab mittels Klemmen fixiert.The The invention relates to a device for posterior stabilization the thoracolumbar spine. There is a modular one for this System comprising a carbon composite rod system and polyaxial and monoaxial titanium screws. Carbon fiber reinforced Plastics, such as a carbon composite rod, are used in medical technology in particular used where high mechanical strength, a load-distributing Design and X-ray transparency are required. At a such known device is in the vortex pedestal one preferably made of titanium screw introduced at the head of a clamping screw is provided, which means an inserted carbon composite rod Fixed clamps.

In der Zeitschrift ”Deutsches Ärzteblatt” Jg. 98, Heft 20, 18. Mai 2001 , sind in einem Artikel von Hans-Georg Willert, Göttingen, im Zusammenhang mit Implantatmaterialien die Pathomechanismen der aseptischen Lockerung von Endoprothesen beschrieben. Gemäß dieser Veröffentlichung führen Mikrobewegungen an der Implantat-Knochen-Grenze zur Ausbildung eines Bindegewebsmantels, der gemeinsam mit Abriebprodukten an den Endoprothesenoberflächen eine Fremdkörperreaktion in Form einer makrophagenreichen Granulombildung auslöst. Über Zytokine wird eine Osteoklastenstimulation mit nachfolgender periprothetischer Osteolyse bewirkt. Nach diesem Artikel von Willert ist es daher oberstes Gebot, bei Implantaten Materialabrieb zu vermeiden. Ferner verschlechtern die gewebefreien Spalten in unmittelbarer Implantatumgebung und durch mechanische Irritationen erzeugte Bindegewebskapseln im Interface die Resistenz gegen Infektionen nach Stephan Perren, Research Institut und AO-Center, Davos. Durch Vermeidung einer Kontaktnekrose könnte daher das Infektionsrisiko gesenkt werden.In the Journal "Deutsches Ärzteblatt", vol. 98, no. 20, 18 May 2001 , in an article by Hans-Georg Willert, Göttingen, in connection with implant materials, the pathomechanisms of aseptic loosening of endoprostheses are described. According to this publication, micromovements at the implant-bone interface result in the formation of a connective tissue sheath which, together with abrasions on the endoprosthesis surfaces, induces a foreign body reaction in the form of macrophage-rich granuloma formation. Cytokines cause osteoclastic stimulation with subsequent periprosthetic osteolysis. According to Willert's article, it is therefore imperative to avoid material abrasion in the case of implants. Furthermore, the tissue-free gaps in the immediate implant environment and connective tissue capsules produced by mechanical irritation in the interface worsen the resistance to infection according to Stephan Perren, Research Institute and AO-Center, Davos. By avoiding contact necrosis, the risk of infection could therefore be reduced.

Nach der einleitend beschriebenen Vorrichtung zur dorsalen Stabilisierung der thorakolumbalen Wirbelsäule, bei der ein Carbon-Composite-Stab mittels einer Klemmschraube am Klemmbereich fixiert wird, treten gerade in diesem Klemmbereich Verformungen an der Oberfläche des Stabes auf. Durch die Reibung der Metallkomponenten der Schraube am Carbon-Composite-Stab werden insbesondere Carbonpartikel als Abrieb erzeugt, welche im Bereich der Stabilisierungsvorrichtung somit im Körper verbleiben.To the initially described device for dorsal stabilization the thoracolumbar spine, where a carbon composite rod is fixed by a clamping screw on the clamping area, step deformations on the surface especially in this clamping area of the staff. Due to the friction of the metal components of the screw On the carbon composite rod in particular carbon particles as Abrasion generated in the region of the stabilization device thus remain in the body.

Die Erfindung zielt daher darauf ab, unter Überwindung der zuvor geschilderten Schwierigkeiten eine Vorrichtung zur dorsalen Stabilisierung der thorakolumbalen Wirbelsäule der eingangs genannten Art bereit zu stellen, bei welcher sich abbriebbedingte Schwierigkeiten, insbesondere Fremdkörperreaktionen, vermeiden lassen.The The invention therefore aims at overcoming the previously described difficulties a device for dorsal Stabilization of the thoracolumbar spine of the beginning to provide this type, in which abbriebbedingte Difficulties, especially foreign body reactions, avoid to let.

Nach der Erfindung wird hierzu eine Vorrichtung zur dorsalen Stabilisierung der thorakolumbalen Wirbelsäule mit wenigstens einer polyaxialen oder monoaxialen, in das Wirbelpedikel eingebrachten Schraube, vorzugsweise aus Titan, an deren Kopf eine Klemmschraube vorgesehen ist, bereitgestellt, welche einen eingelegten Carbon-Composite-Stab mittels Klemmen fixiert. Diese Vorrichtung zeichnet sich nach der Erfindung dadurch aus, dass wenigstens am Klemmbereich von Klemmschraube und Carbon-Composite-Stab eine abriebfeste Materialschicht vorgesehen ist. Durch diese abriebfeste Materialschicht werden die mechanischen Eigenschaften der gesamten Vorrichtung nicht verändert, sondern lediglich im Klemmbereich die Oberfläche des Carbon-Composite-Stabes vor zu Abrieb führenden Reibungserscheinungen geschützt. Hierbei bleibt die Fixierung mittels der Klemmpassung der Klemmschraube sichergestellt, die Röntgentransparenz des Caron-Composite-Stabes bleibt erhalten, und die mechanischen Vorteile des Carbon-Materials als Implantat werden nicht beeinträchtigt. Die abriebfeste Materialschicht sorgt lediglich dafür, insbesondere ab riebbedingte Fremdkörperreaktionen im Bereich der implantierten Vorrichtung zu vermeiden.To The invention is for this purpose a device for dorsal stabilization the thoracolumbar spine with at least one polyaxial or monoaxial screw introduced into the vertebral pedicle, preferably made of titanium, at the head of a clamping screw is provided, which an inserted carbon composite rod fixed by means of terminals. This device is characterized according to the invention by that at least at the clamping area of clamping screw and carbon composite rod an abrasion resistant material layer is provided. By this abrasion-resistant Material layer will be the mechanical properties of the whole Device not changed, but only in the terminal area the surface of the carbon composite rod before to abrasion protected against signs of friction. in this connection remains the fixation by means of the clamping fit of the clamping screw ensured the X-ray transparency of the Caron composite rod remains intact, and the mechanical advantages of the carbon material as an implant are not affected. The abrasion-resistant material layer only provides, especially from rubbing-induced foreign body reactions in the area of the implanted device.

Als besonders geeignete Materialien für die abriebfeste Materialschicht haben sich Titan, Titan-Legierungen, Titan-Aluminium-Legierungen, Edelstahl, Tantal, Tantal-Legierungen, Silikon, Kunststoff, insbesondere Polyethylen, oder Kombinationen hiervon erwiesen.When particularly suitable materials for the abrasion-resistant material layer have titanium, titanium alloys, titanium-aluminum alloys, stainless steel, Tantalum, tantalum alloys, silicone, plastic, especially polyethylene, or combinations thereof.

Gemäß einer bevorzugten Ausgestaltungsform ist die abriebfeste Materialschicht in Form einer Hülse ausgebildet, welche auf den Carbon-Composite-Stab vorzugsweise aufgeschoben und dort kraftschlüssig fixiert wird. Diese Hülse, welche somit teilweise die Oberfläche des Carbon-Composite-Stabes im Klemmbereich abdeckt, bildet an diesen vorbestimmten Stellen der Vorrichtung eine wirksame schützende Hülse gegen Abrieb.According to one preferred embodiment is the abrasion resistant material layer formed in the form of a sleeve, which on the carbon composite rod preferably postponed and fixed there non-positively becomes. This sleeve, which thus partially the surface covering the carbon composite rod in the clamping area, forms on this predetermined locations of the device an effective protective Sleeve against abrasion.

Zusammenfassend ist es bei der erfindungsgemäßen Vorrichtung zur dorsalen Stabilisierung der thorakolumbalen Wirbelsäule zu Vermeidung von Abrieb, insbesondere von Kohlenstoffpartikeln, wesentlich, dass eine abriebfeste Materialschicht wenigstens an den Klemmbereichen von Schraube und Carbon-Composite-Stab vorgesehen wird. Hierdurch lassen sich in wirksamer Weise Fremdkörperreaktionen an den Endoprothesenoberflächen unterdrücken.In summary it is in the inventive device for dorsal stabilization of the thoracolumbar spine to avoid abrasion, in particular of carbon particles, essential that an abrasion resistant material layer at least provided the clamping areas of screw and carbon composite rod becomes. This effectively removes foreign body reactions at the Endoprothesenoberflächen suppress.

Die Erfindung wird nachstehend unter Bezugnahme auf die beigefügte Zeichnung an Hand eines nicht beschränkenden bevorzugten Ausführungsbeispiels näher erläutert. Darin zeigt:The Invention will be described below with reference to the attached Drawing on the basis of a non-limiting preferred Embodiment explained in more detail. It shows:

1 eine schematische Teilschnittansicht eines Ausschnitts einer Vorrichtung zur dorsalen Stabilisierung der thorakolumbalen Wirbelsäule mittels wenigstens einer Schraube und eines Carbon-Composite-Stabes; 1 a schematic partial sectional view of a section of a device for dorsal stabilization of the thoracolumbar spine by means of at least one screw and a carbon composite rod;

2 eine perspektivische Ansicht und eine Axialschnittansicht einer bevorzugten Ausführungsform einer Hülse, welche als abriebfeste Materialschicht beispielsweise bei der Anwendung nach 1 dient; 2 a perspective view and an axial sectional view of a preferred embodiment of a sleeve, which as an abrasion-resistant material layer, for example in the application of 1 is used;

3 zeigt in einer Seitenansicht und einer Querschnittsansicht eine bevorzugte Ausgestaltungsform eines Carbon-Composite-Stabes mit einer abriebfesten Materialschicht in Form einer Hülse nach 2; und 3 shows in a side view and a cross-sectional view of a preferred embodiment of a carbon composite rod with an abrasion-resistant material layer in the form of a sleeve after 2 ; and

4 zeigt in einer perspektivischen Ansicht eine weitere Ausgestaltungsform eines Carbon-Composite-Stabes mit mehreren axial beabstandet angeordneten Hülsen aus abriebfestem Material. 4 shows in a perspective view of another embodiment of a carbon composite rod having a plurality of axially spaced sleeves made of abrasion resistant material.

1 zeigt in einer Schnittansicht eine in ein nicht dargestelltes Wirbelpedikel eingesetzte Schraube 5, an deren Kopf 6 eine insgesamt mit 7 bezeichnete Klemmschraube vorgesehen ist. Diese Anordnung dient als Vorrichtung zur dorsalen Stabilisierung der thorakolumbalen Wirbelsäule. Zur Stabilisierung wird ein insgesamt mit 2 bezeichneter Carbon-Composite-Stab eingesetzt, welcher mittels der Klemmschraube 7 an einem Klemmbereich 3 fixiert wird. Wie aus 1 zu ersehen ist, ist an diesem Klemmbereich 3 eine abriebfeste Materialschicht 1 vorgesehen. Durch diese abriebfeste Materialschicht 1 lassen sich abriebbedingte Schwierigkeiten, wie Fremdkörperreaktionen an den Endoprothesenoberflächen, wirksam vermeiden. 1 shows in a sectional view a screw inserted into an unrepresented vertebral pedicle 5 , at the head 6 a total with 7 designated clamping screw is provided. This arrangement serves as a device for dorsal stabilization of the thoracolumbar spine. To stabilize a total of 2 designated carbon composite rod inserted, which by means of the clamping screw 7 at a clamping area 3 is fixed. How out 1 can be seen, is at this clamping area 3 an abrasion resistant material layer 1 intended. Through this abrasion-resistant material layer 1 Abrasion-related difficulties, such as foreign body reactions at the endoprosthesis surfaces, can be effectively avoided.

Aus 2 ist einerseits eine Längsschnittansicht und andererseits eine perspektivische Ansicht einer insgesamt in Form einer Hülse 10 ausgelegten abriebfesten Materialschicht gezeigt.Out 2 on the one hand is a longitudinal sectional view and on the other hand, a perspective view of a total in the form of a sleeve 10 designed abrasion resistant material layer shown.

Aus den Darstellungen nach 3, wobei einerseits eine Seitenansicht und andererseits eine Axialschnittansicht gezeigt ist, ist zu ersehen ist, dass die beispielsweise in 2 gezeigte Hülse 10 aus abriebfestem Material am Klemmbereich 3 des Carbon-Composite-Stabes 2 aufgeschoben und dort kraftschlüssig fixiert ist.From the illustrations after 3 , on the one hand a side view and on the other hand an axial sectional view is shown, it can be seen that the example in 2 shown sleeve 10 made of abrasion-resistant material at the clamping area 3 of the carbon composite rod 2 deferred and fixed there is non-positive.

In 4 ist in einer perspektivischen Ansicht eine weitere Ausführungsform nach der Erfindung gezeigt, wobei in Axialerstreckung eines Carbon-Composite-Stabes 2 in vorbestimmten axialen Abständen Hülsen 10 aus abriebfestem Material angeordnet sind, die den jeweiligen Klemmbereichen 3 der Klemmschrauben 7 entsprechend 1 zugeordnet sind.In 4 is shown in a perspective view of another embodiment of the invention, wherein in axial extension of a carbon composite rod 2 at predetermined axial intervals sleeves 10 made of abrasion resistant material, which are the respective clamping areas 3 the clamping screws 7 corresponding 1 assigned.

Als abriebfestes Material und insbesondere im Hinblick auf die Bio-Verträglichkeit kommen Titan, Titan-Legierungen, Titan-Aluminium-Legierungen, Edelstahl, Tantal, Tantal-Legierungen, Silikon, Kunststoff, insbesondere Polyethylen, oder Kombinationen hiervor in Betracht.When abrasion-resistant material and in particular with regard to bio-compatibility come titanium, titanium alloys, titanium-aluminum alloys, stainless steel, Tantalum, tantalum alloys, silicone, plastic, especially polyethylene, or combinations thereof.

Selbstverständlich ist die Erfindung nicht auf die voranstehend beschriebenen Einzelheiten der bevorzugten Ausführungsformen beschränkt, sondern es sind zahlreiche Abänderungen und Modifikationen möglich, die der Fachmann im Bedarfsfall treffen wird, ohne den Erfindungsgedanken zu verlassen. Insbesondere kann die abriebfeste Materialschicht 1 körperlich in beliebiger Gestalt ausgelegt werden, und es kommen auch solche Methoden in Betracht, bei denen diese abriebfeste Materialschicht 1 gezielt und gegebenenfalls auch direkt auf der Oberfläche des Carbon-Composite-Stabes 2 am vorhandenen Klemmbereich aufgebracht wird. Selbstverständlich lässt sich die abriebfeste Materialschicht 1 auch im Zusammenhang mit anderen Endoprothesen einsetzen, wenn dort mit Schwierigkeiten hinsichtlich abriebbedingter Fremdkörperreaktionen zu rechnen ist.Of course, the invention is not limited to the details of the preferred embodiments described above, but numerous modifications and modifications are possible, which will be made by those skilled in the art, if necessary, without departing from the spirit of the invention. In particular, the abrasion-resistant material layer 1 be designed physically in any shape, and there are also those methods into consideration, in which this abrasion resistant material layer 1 targeted and possibly also directly on the surface of the carbon composite rod 2 is applied to the existing clamping area. Of course, the abrasion resistant material layer can be 1 also in connection with other endoprostheses, if there is to be expected in terms of abrasion-related foreign body reactions.

ZITATE ENTHALTEN IN DER BESCHREIBUNGQUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Zitierte Nicht-PatentliteraturCited non-patent literature

  • - Zeitschrift ”Deutsches Ärzteblatt” Jg. 98, Heft 20, 18. Mai 2001 [0002] - Journal "Deutsches Ärzteblatt", vol. 98, No. 20, May 18, 2001 [0002]

Claims (4)

Vorrichtung zur dorsalen Stabilisierung der thorakolumbalen Wirbelsäule mit wenigstens einer polyaxialen oder monoaxialen in das Wirbelpedikel eingebrachten Schraube (5), vorzugsweise aus Titan, an deren Kopf (6) eine Klemmschraube (7) vorgesehen ist, welche einen eingelegten Carbon-Composite-Stab (2) mittels Klemmen fixiert, dadurch gekennzeichnet, dass wenigstens am Klemmbereich (3) von Klemmschraube (7) und Carbon-Composite-Stab (2) eine abriebfeste Materialschicht (1) vorgesehen ist.Device for the dorsal stabilization of the thoracolumbar spine with at least one polyaxial or monoaxial screw introduced into the vertebral pedicle ( 5 ), preferably of titanium, at the head ( 6 ) a clamping screw ( 7 ), which comprises an inserted carbon composite rod ( 2 ) fixed by means of clamps, characterized in that at least at the clamping area ( 3 ) of clamping screw ( 7 ) and carbon composite rod ( 2 ) an abrasion-resistant material layer ( 1 ) is provided. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die abriebfeste Materialschicht (1) aus Titan, Titan-Legierungen, Titan-Aluminium-Legierungen, Edelstahl, Tantal, Tantal-Legierungen, Silikon, Kunststoff, insbesondere Polyethylen, oder Kombinationen hiervon besteht.Apparatus according to claim 1, characterized in that the abrasion-resistant material layer ( 1 ) consists of titanium, titanium alloys, titanium-aluminum alloys, stainless steel, tantalum, tantalum alloys, silicone, plastic, in particular polyethylene, or combinations thereof. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die abriebfeste Materialschicht (1) in Form einer Hülse (10) ausgebildet ist.Device according to claim 1 or 2, characterized in that the abrasion-resistant material layer ( 1 ) in the form of a sleeve ( 10 ) is trained. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass die Hülse (10) auf den Carbon-Composite-Stab (2) aufgeschoben und kraftschlüssig fixiert ist.Device according to claim 3, characterized in that the sleeve ( 10 ) on the carbon composite rod ( 2 ) is pushed and fixed non-positively.
DE202009017789U 2009-06-25 2009-06-25 Device for posterior stabilization of the thoracolumbar spine Expired - Lifetime DE202009017789U1 (en)

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RU194566U1 (en) * 2019-07-02 2019-12-16 Федеральное государственное бюджетное учреждение «Российский научный центр «Восстановительная травматология и ортопедия» имени академика Г.А. Илизарова» Министерства здравоохранения Российской Федерации DYNAMIC INTERNAL SPINE LOCK

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