DE9413778U1 - Intervertebral implant - Google Patents
Intervertebral implantInfo
- Publication number
- DE9413778U1 DE9413778U1 DE9413778U DE9413778U DE9413778U1 DE 9413778 U1 DE9413778 U1 DE 9413778U1 DE 9413778 U DE9413778 U DE 9413778U DE 9413778 U DE9413778 U DE 9413778U DE 9413778 U1 DE9413778 U1 DE 9413778U1
- Authority
- DE
- Germany
- Prior art keywords
- intervertebral implant
- implant according
- contact
- support unit
- intervertebral
- 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
Links
- 239000007943 implant Substances 0.000 title claims description 51
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 239000010936 titanium Substances 0.000 claims description 3
- 238000002513 implantation Methods 0.000 claims description 2
- 244000309464 bull Species 0.000 claims 1
- 208000012287 Prolapse Diseases 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000000554 physical therapy Methods 0.000 description 2
- 201000002661 Spondylitis Diseases 0.000 description 1
- 241000950638 Symphysodon discus Species 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 210000000968 fibrocartilage Anatomy 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- HOQADATXFBOEGG-UHFFFAOYSA-N isofenphos Chemical compound CCOP(=S)(NC(C)C)OC1=CC=CC=C1C(=O)OC(C)C HOQADATXFBOEGG-UHFFFAOYSA-N 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 210000000115 thoracic cavity Anatomy 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
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- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L27/00—Materials for grafts or prostheses or for coating grafts or prostheses
- A61L27/02—Inorganic materials
- A61L27/04—Metals or alloys
- A61L27/06—Titanium or titanium alloys
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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
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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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- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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- A61F2250/006—Additional features; Implant or prostheses properties not otherwise provided for modular
- A61F2250/0063—Nested prosthetic parts
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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
- 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
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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
- A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
- A61F2310/00389—The prosthesis being coated or covered with a particular material
- A61F2310/00395—Coating or prosthesis-covering structure made of metals or of alloys
- A61F2310/00407—Coating made of titanium or of Ti-based alloys
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- Health & Medical Sciences (AREA)
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- Biomedical Technology (AREA)
- Orthopedic Medicine & Surgery (AREA)
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- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
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- Public Health (AREA)
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- Vascular Medicine (AREA)
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- Prostheses (AREA)
Description
Dreiss, Hosenthien,Dreiss, Hosenthien,
D-70188 STUTTGART PATENTANWÄLTE HANSLANGOSCHtD-70188 STUTTGART PATENT ATTORNEYS HANSLANGOSCHt
GEROKSTRASSE 6 EUROPEAN PATENT ATTORNEYS Dipl-lng. (1963-1981)GEROKSTRASSE 6 EUROPEAN PATENT ATTORNEYS Dipl.-lng. (1963-1981)
tr {0711)247961 (4 UNES) MANDATAIRES AGREES EUROPEENS UWEDREISStr {0711)247961 (4 UNITS) REPRESENTATIVES AGREE TO EUROPE'S UWEDREEISS
TELEFAX (07t1)247164 BEIM EUROPÄISCHEN PATENTAMT ZUGEUSSENE VERTRETER prof. Dr.jur, Dipl.-lng. M. Sc.FAX (07t1)247164 REPRESENTATIVES ASSIGNED TO THE EUROPEAN PATENT OFFICE Prof. Dr.jur, Dipl.-lng. M. Sc.
HEINZHOSENTHIENHEINZHOSENTHIA
lurBesucher Or.-ing. Oipl.-lng.lurVisitors Or.-ing. Oipl.-lng.
JÖRN FUHLENDORF Dipl.-lng. JÖRN FUHLENDORF Dipl.-lng.
JOSEFSTEIMLE Dip!.-Ing. JOSEFSTEIMLE Dip!.-Ing.
Anmelder:Applicant:
SCHÄFER micomed GmbH
Schuraannweg 70SCHÄFER micomed GmbH
Schuraannweg 70
D-73614 SchorndorfD-73614 Schorndorf
3967 033 S/mz 26.08.94 (WP 94/2)3967 033 S/mz 26.08.94 (WP 94/2)
Titel: ZwischenwirbelimplantatTitle: Intervertebral implant
BeschreibungDescription
Die Erfindung betrifft ein Zwischenwirbelimplantat zum Einsatz zwischen zwei Wirbelkörper einer Wirbelsäule mit einer oberen und einer unteren Anlagefläche und einer die Anlageflächen miteinander verbindenen Stützeinheit.The invention relates to an intervertebral implant for use between two vertebral bodies of a spine with an upper and a lower contact surface and a support unit connecting the contact surfaces to one another.
Die einzelnen Wirbel der Wirbelsäule weisen u.a. einen Wirbelkörper, einen Wirbelbogen, einen Dornfortsatz, zwei Querfortsätze und zwei obere und zwei untere Gelenkfortsätze auf. Die Wirbel sind über an ihren Wirbelkörpern (corpus vertebrae) anliegenden Zwischenwirbelscheiben (disci intervertebralis) miteinander verbunden. Diese Zwischenwirbelscheiben bestehen aus flüssigkeitsreichem Faserknorpel und verbinden die einzelnen Wirbelkörper miteinander. Die Größe der Zwischenwirbelscheiben nimmt vonThe individual vertebrae of the spine have, among other things, a vertebral body, a vertebral arch, a spinous process, two transverse processes and two upper and two lower articular processes. The vertebrae are connected to each other via intervertebral discs (disci intervertebralis) that are attached to their vertebral bodies (corpus vertebrae). These intervertebral discs consist of fluid-rich fibrocartilage and connect the individual vertebral bodies to each other. The size of the intervertebral discs decreases from
Postbank Stuttgart 50771-705 (BLZ 600 100 70) · Dresdner BanK Stuttgart 1919 854 00 (BLZ 600 300 00) S.W.i.F.T.-aclress DFlES DE FF SOOPostbank Stuttgart 50771-705 (bank code 600 100 70) · Dresdner BanK Stuttgart 1919 854 00 (bank code 600 300 00) S.W.i.F.T.-aclress DFlES DE FF SOO
ID: DE 147507237ID: DE 147507237
oben nach unten entsprechend der im menschlichen Körper auftretenden Belastung zu. Die Zwischenwirbelscheiben dienen als elastische Puffer und dämpfen federnd Stöße ab. Es ist bekannt, daß sich die Zwischenwirbelscheiben verlagern können oder daß der innere Gallertkern (nucleus pulposus) durch Risse im bindegewebartigen knorpeligen äußeren Ring (annulus fibrosus) austreten kann. Dabei kann die Zwischenwirbelscheibe teilweise in die Zwischenwirbellöcher (foramina intervertebralia) bzw. in den Spinalkanal eintreten. Außerdem kann dieser Prolaps medial bzw. dorsal medial oder lateral sein. Derartige Prolapse treten am häufigsten an den L4-L5, L5-S1 und C6-C7-Vertebrales auf. Werden derartige Prolapse nicht therapiert, kommt es zu irreversiblen Druckschädigungen von Nervenwurzeln oder zu Querschnittsläsionen. Sollte eine symptomatische Physiotherapie, z.B. Krankengymnastik oder Massage, keinen Erfolg versprechen, muß die discus intervertebralis operativ entfernt werden. Nun besteht die Möglichkeit der Implantation einer künstlichen Zwischenwirbelscheibe oder der Osteosynthese der beiden Wirbel über ein starres Zwischenwirbelimplantat.top to bottom in accordance with the load occurring in the human body. The intervertebral discs act as elastic buffers and absorb shocks with a spring. It is known that the intervertebral discs can become displaced or that the inner gelatinous core (nucleus pulposus) can protrude through tears in the connective tissue-like, cartilaginous outer ring (annulus fibrosus). The intervertebral disc can then partially enter the intervertebral foramina (foramina intervertebralia) or the spinal canal. In addition, this prolapse can be medial or dorsal, medial or lateral. Such prolapses occur most frequently in the L 4 -L 5 , L 5 -S 1 and C 6 -C 7 vertebrales. If such prolapses are not treated, irreversible pressure damage to nerve roots or transverse lesions occur. If symptomatic physiotherapy, eg physical therapy or massage, does not promise success, the discus intervertebralis must be surgically removed. It is then possible to implant an artificial intervertebral disc or to osteosynthesize the two vertebrae using a rigid intervertebral implant.
Aus der EP 392 076 Al ist eine künstliche Zwischenwirbelscheibe bekannt geworden, die aus einer oberen und unteren Anlagefläche und einer elastischen Zwischenschicht besteht. Aus der Anlagefläche ragen Ankerbolzen heraus, über die die künstlicheEP 392 076 Al discloses an artificial intervertebral disc that consists of an upper and lower contact surface and an elastic intermediate layer. Anchor bolts protrude from the contact surface, over which the artificial
Zwischenwirbelscheibe an den Wirbelkörpern fixiert wird. Als nachteilig hat sich herausgestellt, daß aufgrund der elastischen Zwischenschicht zwischen den beiden Anlageflächen keine optimale Synthese der beiden Wirbel erzielbar ist.The intervertebral disc is fixed to the vertebral bodies. It has been shown to be disadvantageous that due to the elastic intermediate layer between the two contact surfaces, optimal synthesis of the two vertebrae cannot be achieved.
Aus der US 5,192,327 ist ein starres Zwischenwirbelimplantat bekannt geworden, welches zur Osteosynthese ebenfalls zwischen zwei Wirbelkörper eingesetzt wird. Bei diesem Implantat müssen die beiden Wirbel auf einen vorgegebenen Abstand zueinander gebracht werden, um das Implantat einsetzen zu können. Weisen die beiden Wirbel einen zu großen Abstand auf, kann das Implantat leicht verrutschen bzw. findet keinen Halt.US 5,192,327 describes a rigid intervertebral implant that is also inserted between two vertebral bodies for osteosynthesis. With this implant, the two vertebrae must be placed at a predetermined distance from each other in order to insert the implant. If the distance between the two vertebrae is too great, the implant can easily slip or not hold.
Der Erfindung liegt daher die Aufgabe zugrunde, ein Zwischenwirbelimplantat mit dem eingangs genannten Aufbau bereitzustellen, welches einerseits einfach zwischen die Wirbelkörper einzuführen ist, welches jedoch eine optimale Abstützung der beiden anliegenden Wirbel gewährleistet.The invention is therefore based on the object of providing an intervertebral implant with the structure mentioned above, which on the one hand is easy to insert between the vertebral bodies, but which ensures optimal support of the two adjacent vertebrae.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Implantat einen modularen Aufbau aufweist und die Anlageflächen von Anlagescheiben gebildet werden, die unmittelbar vor der Implantation mit einer solchen Stützeinheit fügbar sind, daß das Implantat eine dem Einsatzort entsprechende Höhe aufweist.This object is achieved according to the invention in that the implant has a modular structure and the contact surfaces are formed by contact disks which can be joined to a support unit immediately before implantation so that the implant has a height corresponding to the location of use.
06U9906U99
06U9-9H06U9-9H
06-U9-9H·06-U9-9H·
06U9906U99
Durch den modularen Aufbau des Implantats wird der wesentliche Vorteil erzielt, daß vor dem Einbau des Implantats dieses in Einzelteilen vorliegt und erst unmittelbar vor dem Einsetzen paßgenau zusammengebaut wird. Dabei werden die Anlagescheiben mit einer Stützeinheit verbunden, die den Abstand der beiden Wirbel bestimmt. Erfindungsgemäß können also die Anlagescheiben mit einer Vielzahl von Stützeinheiten verbunden werden, so daß immer ein Implantat zur Verfügung steht, welches exakt zwischen die beiden Wirbel eingesetzt werden kann.The modular design of the implant provides the significant advantage that the implant is available in individual parts before it is installed and is only assembled to fit perfectly immediately before insertion. The contact discs are connected to a support unit that determines the distance between the two vertebrae. According to the invention, the contact discs can be connected to a large number of support units so that there is always an implant available that can be inserted exactly between the two vertebrae.
Mit dem erfindungsgemäßen Zwischenwirbelimplantat können nicht nur Zwischenwirbelscheiben ersetzt werden, es können auch ganze Wirbel überbrückt werden. Dies ist insbesondere dann erforderlich, wenn ein kompletter Wirbel aufgrund von z.B. Spondylitis operertativ entfernt worden ist. Die beiden Anlagescheiben werden mit der entsprechenden Stützeinheit auf einen Abstand eingestellt, der im wesentlichen dem operativ entfernten Wirbel und den Zwischenwirbelscheiben entspricht. Das erfindungsgemäße Zwischenwirbelimplantat dient demnach als Platzhalter für Zwischenwirbelscheiben und/oder ganzen Wirbeln.The intervertebral implant according to the invention can not only replace intervertebral discs, but also bridge entire vertebrae. This is particularly necessary if an entire vertebra has been surgically removed due to spondylitis, for example. The two contact discs are adjusted with the corresponding support unit to a distance that essentially corresponds to the surgically removed vertebra and the intervertebral discs. The intervertebral implant according to the invention therefore serves as a placeholder for intervertebral discs and/or entire vertebrae.
Bei einer Weiterbildung ist vorgesehen, daß wenigstens eine Anlagescheibe als Ring ausgebildet ist. Diese Ausgestaltung hat den Vorteil, daß das Implantat besser an denIn a further development, at least one contact disc is designed as a ring. This design has the advantage that the implant fits better to the
benachbarten Wirbel anliegt und einfacher vom Knochengewebe umwachsen werden kann.adjacent vertebrae and can be more easily surrounded by bone tissue.
Ein einfaches Fügen des erfindungsgemäßen Zwischenwirbelimplantats wird dadurch erzielt, daß die Anlagescheiben an ihren einander zugewandten Seiten Aufnahmen für die Stützeinheit aufweisen. Zusätzlich können die Anlagescheiben an ihren einander abgewandten Seiten Aufnahmen für weitere Stützeinheiten aufweisen. Auf diese Weise können nicht nur zwei sondern mehrere Anlagescheiben miteinander verbunden werden, wodurch ein turmartiges Gebilde aufgebaut werden kann. Auf diese Weise können auch mehrere Wirbel überbrückt werden.A simple joining of the intervertebral implant according to the invention is achieved in that the contact discs have receptacles for the support unit on their sides facing each other. In addition, the contact discs can have receptacles for further support units on their sides facing away from each other. In this way, not just two but several contact discs can be connected to each other, whereby a tower-like structure can be built up. In this way, several vertebrae can also be bridged.
Eine optimale Verankerung des Zwischenwirbelimplantas mit den Stirnseiten der anliegenden Wirbel wird dadurch erreicht, daß die Anlagescheiben wenigstens an ihren einander abgewandten Stirnflächen mit einer von der glatten Oberfläche abweichenden Oberflächenkontur, z.B. einer Riffelung, Verzahnung oder dgl, versehen sind. Ein Verrutschen des Implantats ist somit nahezu ausgeschlossen.Optimal anchoring of the intervertebral implant with the front sides of the adjacent vertebrae is achieved by providing the contact discs with a surface contour that differs from the smooth surface, e.g. a ribbing, serration or similar, at least on their opposite front surfaces. Slipping of the implant is thus almost impossible.
Erfindungsgemäß besteht die Stützeinheit aus mehreren Stäben. Dieser Aufbau hat den wesentlichen Vorteil, daß er relativ einfach ist, ein geringes Gewicht aufweist, von Knochengewebe leicht durchwachsen werden kann und aufgrund der einfachen Bauteile leicht zu bevorraten ist.According to the invention, the support unit consists of several rods. This structure has the significant advantage that it is relatively simple, has a low weight, can easily be penetrated by bone tissue and is easy to store due to the simple components.
Erfindungsgemäß bestehen die Aufnahmen aus insbesondere vertikalen Einsenkungen. In diese Einsenkungen werden die Stäbe der Stützeinheit eingeführt bzw. eingeschlagen und halten dort aufgrund einer Preßpassung. Der Aufbau des erfindungsgemäßen Implantats ist sehr schnell durchzuführen und die Höhe des Implantats kann durch unterschiedlich lange Stäbe exakt eingestellt werden.According to the invention, the receptacles consist of vertical recesses in particular. The rods of the support unit are inserted or driven into these recesses and are held there by a press fit. The implant according to the invention can be constructed very quickly and the height of the implant can be adjusted precisely using rods of different lengths.
Bei einer Weiterbildung ist vorgesehen, daß die Stützeinheit ein feinmaschiges Gitter insbesondere aus Titan oder körperverträglichem Kunststoff aufweist. Dieses feinmaschige Gitter fördert die Auffüllung des Implantats mit Spongiosa.In a further development, the support unit is provided with a fine-mesh grid, particularly made of titanium or biocompatible plastic. This fine-mesh grid promotes the filling of the implant with spongiosa.
Der modulare Aufbau hat den wesentlichen Vorteil, daß mehrere Stützeinheiten mit unterschiedlicher Länge, insbesondere mehrere Stäbe unterschiedlicher Länge zur Verfügung stehen, so daß nahezu jede Bauhöhe mit dem erfindungsgemäßen Implantat erzielt werden kann. Eine optimale Anpassung wird dadurch erzielt, daß die Anlagescheibe im Ventral-Dorsal-Vertikalschnitt eine Keilform aufweist. Durch diese Keilform ist eine optimale Anpassung an die benachbarten Wirbel möglich.The modular design has the significant advantage that several support units of different lengths, in particular several rods of different lengths, are available, so that almost any construction height can be achieved with the implant according to the invention. An optimal adaptation is achieved by the fact that the support disc has a wedge shape in the ventral-dorsal vertical section. This wedge shape enables an optimal adaptation to the neighboring vertebrae.
Bei einer anderen Ausführungsform stehen die Anlagescheiben parallel zueinander. Dies ist insbesondere im Thoraxbereich der Wirbelsäule von Vorteil, da dort die einzelnen Wirbel nahezu parallel aufeinander liegen.In another embodiment, the contact discs are parallel to each other. This is particularly advantageous in the thoracic region of the spine, as the individual vertebrae there are almost parallel to each other.
Weitere Vorteile, Merkmale und Einzelheiten ergeben sich aus der nachfolgenden Beschreibung, in der unter Bezugnahme auf die Zeichnung besonders bevorzugte Ausführungsbeispiele im einzelnen dargestellt sind. Dabei können die in den Ansprüchen und der Beschreibung erwähnten und in der Zeichnung dargestellten Merkmale jeweils einzeln für sich oder in beliebiger Kombination erfindungswesentlich sein. In der Zeichnung zeigen:Further advantages, features and details emerge from the following description, in which particularly preferred embodiments are shown in detail with reference to the drawing. The features mentioned in the claims and the description and shown in the drawing can each be essential to the invention individually or in any combination. The drawing shows:
Figur 1 eine Draufsicht auf das erfindungsgemäße Zwischenwirbelimplantat;Figure 1 is a plan view of the intervertebral implant according to the invention;
Figur 2 eine perspektivische Ansicht, teilweise explosiv dargestellt, des erfindungsgemäßen Zwischenwirbelimplantats;Figure 2 is a perspective view, partially exploded, of the intervertebral implant according to the invention;
Figur 3 einen Schnitt III-III gemäß Figur 2; und Figur 4 einen Schnitt IV-IV gemäß Figur 1.Figure 3 shows a section III-III according to Figure 2; and Figure 4 shows a section IV-IV according to Figure 1.
Die Figur 1 zeigt ein insgesamt mit 1 bezeichnetes ventrales Zwischenwirbelimplantat in Draufsicht, welches eine dem Querschnitt eines Wirbelkörpers angenäherte Querschnittsform aufweist. Entsprechend ist die ventrale Seite 2 des Zwischenwirbelimplantats konvex ausgebildet, wohingegen die dorsale Seite 3 eben gestaltet ist. Es ist auch denkbar, daß diese dorsale Seite 3 konkav gekrümmt ist. Es sind auchFigure 1 shows a top view of a ventral intervertebral implant, designated as a whole with 1, which has a cross-sectional shape that approximates the cross-section of a vertebral body. Accordingly, the ventral side 2 of the intervertebral implant is convex, whereas the dorsal side 3 is flat. It is also conceivable that this dorsal side 3 is concavely curved.
ringförmige oder ovale Querschnittsformen denkbar. Zwischen diesen beiden Seiten 2 und 3 ist ein Durchbruch 4 erkennbar, der ein Auffüllen des Implantats 1 mit Spongiosa fördert. Ferner sind als Sackloch 5 ausgebildete Aufnahmen 6 erkennbar, in denen eine Stützeinheit 7 (Figur 2) verankerbar ist. Insgesamt sind zehn bis zwölf derartiger Aufnahmen vorgesehen.ring-shaped or oval cross-sectional shapes are conceivable. Between these two sides 2 and 3, a breakthrough 4 can be seen, which promotes filling of the implant 1 with spongiosa. In addition, receptacles 6 designed as blind holes 5 can be seen, in which a support unit 7 (Figure 2) can be anchored. A total of ten to twelve such receptacles are provided.
In der Figur 2 ist der Aufbau des Zwischenwirbelimplantats 1 erkennbar. Dabei wird deutlich, daß die Stützeinheit 7 aus mehreren Stäben 8 besteht, die in den Aufnahmen 6 verankert werden. Die Stäbe 8 weisen im Ausführungsbeispiel der Figur 2 eine gleiche Länge auf, sie können jedoch auch unterschiedlich lang sein. Zur Verankerung der Stäbe 8 sind sowohl auf der Oberseite als auch auf der Unterseite von Anlageflächen 9 bildenden Anlagescheiben 10 Aufnahmen 6 vorgesehen.The structure of the intervertebral implant 1 can be seen in Figure 2. It is clear that the support unit 7 consists of several rods 8 that are anchored in the receptacles 6. In the embodiment of Figure 2, the rods 8 have the same length, but they can also be of different lengths. To anchor the rods 8, receptacles 6 are provided on both the top and bottom of the contact disks 10 that form contact surfaces 9.
Im Schnitt III-III, der in der Figur 3 dargestellt ist, ist deutlich erkennbar, daß die an der Oberseite sowie an der Unterseite vorgesehenen Aufnahmen 6 einander gegenüberliegen und als Sackloch 5 ausgebildet sind. In diese Aufnahmen 6 werden die Stäbe 8 eingeschlagen. Durch Verwendung mehrerer Anlagescheiben 10 kann ein turmartiger Aufbau erzielt werden.In section III-III, which is shown in Figure 3, it is clearly visible that the receptacles 6 provided on the top and bottom are opposite each other and are designed as blind holes 5. The rods 8 are driven into these receptacles 6. By using several support disks 10, a tower-like structure can be achieved.
I"::-..:"! Cj. QL5.I"::-..:"! Cj. QL 5 .
Aus den Figuren 3 und 4 ist erkennbar, daß die Stirnflächen der Anlagescheiben 10 eine Verzahnung 11 aufweisen, die einen optimalen Halt an den benachbarten Wirbeln gewährleisten. Der Einfachheit halber ist diese Verzahnung 11 in den Figuren 1 und 2 nicht dargestellt. Aus der Figur 4 ist deutlich die Keilform der Anlagescheibe 10 erkennbar. Auf diese Weise können auch winklig zueinander stehende Wirbel optimal miteinander verbunden werden.From Figures 3 and 4 it can be seen that the front surfaces of the contact disks 10 have a toothing 11, which ensures an optimal hold on the neighboring vertebrae. For the sake of simplicity, this toothing 11 is not shown in Figures 1 and 2. The wedge shape of the contact disk 10 can be clearly seen from Figure 4. In this way, even vertebrae that are at an angle to one another can be optimally connected to one another.
Durch den modularen Aufbau des erfindungsgemäßen Zwischenwirbelimplantats 1 ist gewährleistet, daß durch Verwendung von Stäben 8 mit entsprechender Länge, wobei das Implantat 1 unmittelbar vor dem Einbau zusammengebaut wird, der Freiraum zwischen den miteinander zu verbindenden Wirbeln optimal ausgefüllt wird und die restlichen Wirbel der Wirbelsäule ihre ursprüngliche Lage beibehalten können. Ein Halt der Stäbe 8 in den Aufnahmen 6 kann z.B. über eine Preßpassung, Verstemmung, Einschraubung oder dgl. erzielt werden. Durch das Vorhandensein einer Vielzahl von Aufnahmen 6 können die Stäbe 8, wobei jeweils lediglich vier oder fünf Stäbe verwendet werden, an den geeignetsten Orten eingebaut werden. In dem von den Stäben 8 umgebenen Innenraum kann ein feinmaschiges Netz oder Gitter eingebracht werden, welches die Auffüllung des Implantats 1 mit Spongiosa fördert.The modular design of the intervertebral implant 1 according to the invention ensures that by using rods 8 of the appropriate length, whereby the implant 1 is assembled immediately before installation, the free space between the vertebrae to be connected is optimally filled and the remaining vertebrae of the spine can retain their original position. The rods 8 can be held in the receptacles 6, for example, by means of a press fit, caulking, screwing or the like. The presence of a large number of receptacles 6 means that the rods 8 can be installed in the most suitable places, whereby only four or five rods are used at a time. A fine-mesh net or grid can be inserted into the interior space surrounded by the rods 8, which promotes the filling of the implant 1 with spongiosa.
Claims (15)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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DE9413778U DE9413778U1 (en) | 1994-08-26 | 1994-08-26 | Intervertebral implant |
DE4432033A DE4432033C2 (en) | 1994-08-26 | 1994-09-09 | Intervertebral implant |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE9413778U DE9413778U1 (en) | 1994-08-26 | 1994-08-26 | Intervertebral implant |
Publications (1)
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DE9413778U1 true DE9413778U1 (en) | 1996-01-04 |
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DE9413778U Expired - Lifetime DE9413778U1 (en) | 1994-08-26 | 1994-08-26 | Intervertebral implant |
DE4432033A Expired - Fee Related DE4432033C2 (en) | 1994-08-26 | 1994-09-09 | Intervertebral implant |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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DE4432033A Expired - Fee Related DE4432033C2 (en) | 1994-08-26 | 1994-09-09 | Intervertebral implant |
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DE (2) | DE9413778U1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
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DE29720022U1 (en) * | 1997-11-12 | 1998-01-15 | SCHÄFER micomed GmbH, 73035 Göppingen | Intervertebral implant |
WO1998017207A1 (en) * | 1996-10-21 | 1998-04-30 | Synthes Ag Chur | Surgical prosthetic device |
WO1998022050A1 (en) * | 1996-11-22 | 1998-05-28 | Buttermann Glenn R | Intervertebral prosthetic device |
WO1998038948A1 (en) * | 1997-03-04 | 1998-09-11 | Implico B.V. | An artefact suitable for use as a bone implant |
DE19903764A1 (en) * | 1998-01-23 | 2000-08-17 | Aesculap Ag & Co Kg | Intervertebral implant |
WO2002024122A2 (en) * | 2000-09-19 | 2002-03-28 | Sdgi Holdings, Inc. | Reinforced molded implant formed of cortical bone |
WO2003020143A1 (en) * | 2001-02-28 | 2003-03-13 | Synthes (U.S.A.) | Bilateral laminoplasty implants |
DE20117773U1 (en) * | 2001-10-31 | 2003-03-20 | Königsee Implantate und Instrumente zur Osteosynthese GmbH, 07426 Königsee | Implant to stabilize the vertebrae cervicales |
US6562072B1 (en) | 1998-01-23 | 2003-05-13 | Aesculap Ag & Co. Kg | Implant for insertion between spinal column vertebrae |
WO2004089260A1 (en) * | 2003-04-03 | 2004-10-21 | Sdgi Holdings, Inc. | Apparatus and method for supporting vertebral bodies |
EP1541095A3 (en) * | 2003-12-08 | 2006-01-04 | Depuy Products, Inc. | Implant device for cartilage regeneration in load bearing articulation regions |
US7862618B2 (en) | 2006-07-19 | 2011-01-04 | Warsaw Orthopedic, Inc. | Expandable vertebral body implants and methods of use |
US8057549B2 (en) | 2003-08-07 | 2011-11-15 | Dynamic Spine, Inc. | Apparatus and method for performing spinal surgery |
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AU9282601A (en) * | 2000-09-19 | 2002-04-02 | Sdgi Holdings Inc | Osteogenic fusion devices |
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FR2575059B1 (en) * | 1984-12-21 | 1988-11-10 | Daher Youssef | SHORING DEVICE FOR USE IN A VERTEBRAL PROSTHESIS |
CA1318469C (en) * | 1989-02-15 | 1993-06-01 | Acromed Corporation | Artificial disc |
US5192327A (en) * | 1991-03-22 | 1993-03-09 | Brantigan John W | Surgical prosthetic implant for vertebrae |
AT395524B (en) * | 1991-04-18 | 1993-01-25 | Intermeditec Ag | Spinal implant |
DE4215137A1 (en) * | 1991-06-04 | 1992-12-10 | Man Ceramics Gmbh | IMPLANT FOR SPINE PILLARS |
-
1994
- 1994-08-26 DE DE9413778U patent/DE9413778U1/en not_active Expired - Lifetime
- 1994-09-09 DE DE4432033A patent/DE4432033C2/en not_active Expired - Fee Related
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WO1998017207A1 (en) * | 1996-10-21 | 1998-04-30 | Synthes Ag Chur | Surgical prosthetic device |
US6019793A (en) * | 1996-10-21 | 2000-02-01 | Synthes | Surgical prosthetic device |
WO1998022050A1 (en) * | 1996-11-22 | 1998-05-28 | Buttermann Glenn R | Intervertebral prosthetic device |
EP1342456A1 (en) * | 1996-11-22 | 2003-09-10 | Glenn R. Buttermann | Intervertebral prosthetic device |
WO1998038948A1 (en) * | 1997-03-04 | 1998-09-11 | Implico B.V. | An artefact suitable for use as a bone implant |
DE29720022U1 (en) * | 1997-11-12 | 1998-01-15 | SCHÄFER micomed GmbH, 73035 Göppingen | Intervertebral implant |
US6562072B1 (en) | 1998-01-23 | 2003-05-13 | Aesculap Ag & Co. Kg | Implant for insertion between spinal column vertebrae |
DE19903764A1 (en) * | 1998-01-23 | 2000-08-17 | Aesculap Ag & Co Kg | Intervertebral implant |
DE19903764B4 (en) * | 1998-01-23 | 2005-03-31 | Aesculap Ag & Co. Kg | Intervertebral implant |
WO2002024122A2 (en) * | 2000-09-19 | 2002-03-28 | Sdgi Holdings, Inc. | Reinforced molded implant formed of cortical bone |
WO2002024122A3 (en) * | 2000-09-19 | 2002-07-25 | Sdgi Holdings Inc | Reinforced molded implant formed of cortical bone |
US7618460B2 (en) | 2000-09-19 | 2009-11-17 | Warsaw Orthopedic, Inc. | Reinforced molded implant formed of cortical bone |
WO2003020143A1 (en) * | 2001-02-28 | 2003-03-13 | Synthes (U.S.A.) | Bilateral laminoplasty implants |
DE20117773U1 (en) * | 2001-10-31 | 2003-03-20 | Königsee Implantate und Instrumente zur Osteosynthese GmbH, 07426 Königsee | Implant to stabilize the vertebrae cervicales |
WO2004089260A1 (en) * | 2003-04-03 | 2004-10-21 | Sdgi Holdings, Inc. | Apparatus and method for supporting vertebral bodies |
US7563281B2 (en) | 2003-04-03 | 2009-07-21 | Warsaw Orthopedic, Inc. | Apparatus and method for supporting vertebral bodies |
AU2004227832B2 (en) * | 2003-04-03 | 2010-07-08 | Warsaw Orthopedic, Inc. | Apparatus and method for supporting vertebral bodies |
AU2004227832B9 (en) * | 2003-04-03 | 2010-11-18 | Warsaw Orthopedic, Inc. | Apparatus and method for supporting vertebral bodies |
US8012213B2 (en) | 2003-04-03 | 2011-09-06 | Warsaw Orthopedic, Inc. | Apparatus and method for supporting vertebral bodies |
US8613769B2 (en) | 2003-04-03 | 2013-12-24 | Warsaw Orthopedic, Inc. | Apparatus and method for supporting vertebral bodies |
US8057549B2 (en) | 2003-08-07 | 2011-11-15 | Dynamic Spine, Inc. | Apparatus and method for performing spinal surgery |
EP1541095A3 (en) * | 2003-12-08 | 2006-01-04 | Depuy Products, Inc. | Implant device for cartilage regeneration in load bearing articulation regions |
US7666230B2 (en) | 2003-12-08 | 2010-02-23 | Depuy Products, Inc. | Implant device for cartilage regeneration in load bearing articulation regions |
US9597198B2 (en) | 2006-02-15 | 2017-03-21 | Ldr Medical | Transforaminal intersomatic cage for an intervertebral fusion graft and an instrument for implanting the cage |
US10758363B2 (en) | 2006-02-15 | 2020-09-01 | Ldr Medical | Transforaminal intersomatic cage for an intervertebral fusion graft and an instrument for implanting the cage |
US7862618B2 (en) | 2006-07-19 | 2011-01-04 | Warsaw Orthopedic, Inc. | Expandable vertebral body implants and methods of use |
DE102020103015A1 (en) | 2020-02-06 | 2021-08-12 | Aesculap Ag | Intervertebral implant |
Also Published As
Publication number | Publication date |
---|---|
DE4432033A1 (en) | 1996-02-29 |
DE4432033C2 (en) | 2002-08-08 |
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