DE9107494U1 - Vertebral body replacement - Google Patents

Vertebral body replacement

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Publication number
DE9107494U1
DE9107494U1 DE9107494U DE9107494U DE9107494U1 DE 9107494 U1 DE9107494 U1 DE 9107494U1 DE 9107494 U DE9107494 U DE 9107494U DE 9107494 U DE9107494 U DE 9107494U DE 9107494 U1 DE9107494 U1 DE 9107494U1
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DE
Germany
Prior art keywords
vertebral body
body replacement
threaded rod
support element
bore
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Expired - Lifetime
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DE9107494U
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German (de)
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Individual
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Individual
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Priority to DE9107494U priority Critical patent/DE9107494U1/en
Publication of DE9107494U1 publication Critical patent/DE9107494U1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30378—Spherically-shaped protrusion and recess
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30405—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves
    • A61F2002/30411—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves having two threaded end parts connected by a threaded central part with opposite threads at its opposite ends, i.e. for adjusting the distance between both end parts by rotating the central part
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30538—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/3055—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting length
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • 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
    • A61F2250/0004—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable
    • A61F2250/0006—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable for adjusting angular orientation

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Neurology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Description

Gerhard Weber, 7238 Oberndorf
248/02Gerhard Weber, 7238 Oberndorf
248/02

12. Juni 1991 Ott/ot12 June 1991 Ott/ot

Wirbelkörperersatz 10 Vertebral body replacement 10

Dir Erfindung betrifft einen Wirbelkörperersatz gemäß der Gattung des Hauptanspruchs.The invention relates to a vertebral body replacement according to the preamble of the main claim.

Nach einer Wirbelkörper-Resektion bei Tumoren werden zur Stabilisierung und Aufrichtung der Wirbelsäule Implantate verwendet, die an die Stelle des fehlenden Wirbelkörpers treten. Damit ein Aufrichten der Wirbelsäule möglich ist, bestitzt der Wirbelkörperersatz eine verstellbare Länge.After a vertebral body resection for tumors, implants are used to stabilize and straighten the spine. These implants take the place of the missing vertebral body. To enable the spine to be straightened, the vertebral body replacement has an adjustable length.

Ein bekannter Wirbelkörperersatz besteht im wesentlichen aus einer Gewindestange, an deren beiden Enden Stützelemente aufgeschraubt sind, die durch Verdrehen entlang des Gewindestabes in ihrer Position verändert werden können. Da die gegenüberstehenden Wirbel, zwischen denen ein soleher Wirbelkörperersatz eingesetzt wird, in der Regel nicht parallel zueinander ausgerichtet sind, lassen sich die starr ausgebildeten bekannten Implantate oftmals nur schwierig zwischen den einander zugewandten DeckplattenA known vertebral body replacement essentially consists of a threaded rod, with support elements screwed onto both ends, which can be changed in position by twisting along the threaded rod. Since the opposing vertebrae between which such a vertebral body replacement is inserted are usually not aligned parallel to each other, the rigidly designed known implants are often difficult to insert between the cover plates facing each other.

der Wirbel einsetzten.
30the vortex began.
30

Der Erfindung liegt die Aufgabe zugrunde, einen Wirbelkörperersatz zur Implantation im Halswirbel- und Brustwirbelbereich zu schaffen, der auch bei zueinander geneigten, gegenüberliegenden Wirbeln problemlos implantierbar ist. 35The invention is based on the task of creating a vertebral body replacement for implantation in the cervical and thoracic vertebrae area, which can be easily implanted even in the case of opposing vertebrae that are inclined towards each other. 35

Die Lösung dieser Aufgabe erhält man durch die im AnspruchThe solution to this problem is obtained by the claim

1 angegebenen Merkmale. Die an den beiden Enden des Gewindestabes angeordneten Lagerkugeln mit einer Gewinde-Durchgangsbohrung ermöglichen es, daß das auf die Lagerkugel aufgesetzte Stützelement allseitig verschwenkbar ist und sich somit optimal an die jeweilige Neigung des anliegenden Wirbels anpassen kann.1. The bearing balls with a threaded through hole arranged at both ends of the threaded rod enable the support element placed on the bearing ball to be pivoted in all directions and can therefore be optimally adapted to the respective inclination of the adjacent vertebra.

Vorzugsweise stehen am Stützelement stirnseitig mehrere Dornen ab, die eine gute Verankerung in der jeweiligen IQ Deckplatte des Wirbels gewährleisten.Preferably, several spikes protrude from the front of the support element to ensure good anchoring in the respective IQ cover plate of the vertebra.

Der Aufnahmeraum für die Lagerkugel wird in dem Stützelement auf sehr einfache Weise durch eine Bohrung gebildet, die an der dem Gewindestab zugewandten Seite eine Verjüngung hat. Diese Verjüngung läßt sich nach Einsetzen der Lagerkugel sehr einfach durch ein Eindrücken oder Umbördeln des Öffnungsrandes der Bohrung erreichen.The space for the bearing ball is formed in the support element in a very simple way by a hole that has a taper on the side facing the threaded rod. This taper can be achieved very easily after inserting the bearing ball by pressing in or flanging the opening edge of the hole.

Die Bohrung wird vorzugsweise als Durchgangsbohrung ausgeführt, damit die Position des Endes des Gewindestabes von außen sichtbar ist. Diese Sichtkontrolle gewährleistet, daß der Gewindestab ausreichend tief in die Gewindebohrung der Lagerkugel eingeschraubt ist, damit beim Aufrichten - nach dem Einsetzen des Wirbelkörperersatzes zwischen zwei Wirbeln - genügend Gewindelänge für den Aufrichtvorgang zur Verfügung steht.The hole is preferably designed as a through hole so that the position of the end of the threaded rod is visible from the outside. This visual inspection ensures that the threaded rod is screwed deep enough into the threaded hole of the bearing ball so that when straightening - after inserting the vertebral body replacement - between two vertebrae, there is enough thread length available for the straightening process.

Der Gewindestab ist vorzugsweise in der Mitte mit einem schraubenmutterförmigen Element versehen, an dem ein Schraubwerkzeug, beispielsweise ein Schraubenschlüssel, ansetzbar ist. Zu beiden Seiten dieses schraubenmutterförmigen Elements besitzt der Gewindestab einerseits ein Linksgewinde und andererseits ein Rechtsgewinde, damit durch Drehung des Gewindestabes die an den Enden befindlichen Lagerkugeln entweder nach außen oder zueinander nach innen verstellbar sind.The threaded rod is preferably provided with a screw-nut-shaped element in the middle to which a screwing tool, for example a wrench, can be attached. On both sides of this screw-nut-shaped element, the threaded rod has a left-hand thread on the one hand and a right-hand thread on the other, so that by rotating the threaded rod, the bearing balls at the ends can be adjusted either outwards or inwards towards each other.

NS ii/ ^y^NS ii/ ^y^

Die Erfindung wird nachfolgend anhand eines in der Zeichnung dargestellten Ausführungsbeispiel näher erläutert.The invention is explained in more detail below using an embodiment shown in the drawing.

Es zeigen:Show it:

Figur 1 ein als Wirbelkörperersatz ausgebildetes Implantat, welches zwischen zwei Wirbeln einsetzbar ist, undFigure 1 shows an implant designed as a vertebral body replacement that can be inserted between two vertebrae, and

IQ Figur 2 den in Figur 1 dargestellten Wirbelkörperersatz in vergrößerter Darstellung. IQ Figure 2 shows the vertebral body replacement shown in Figure 1 in an enlarged view.

In Figur 1 ist ein Ausschnitt aus einer Wirbelsäule dargestellt, bei der eine Wirbelkörper-Resektion zwischen einem oberen Wirbel 1 und einem unteren Wirbel 2 vorgenommen worden ist. Zwischen diese beiden Wirbel 1, 2 kann der Wirbelkörperersatz 3 in die mit unterbrochenen Linien angedeutete Position 4 eingesetzt werden.Figure 1 shows a section of a spine in which a vertebral body resection has been performed between an upper vertebra 1 and a lower vertebra 2. The vertebral body replacement 3 can be inserted between these two vertebrae 1, 2 in the position 4 indicated by broken lines.

Der Wirbelkörperersatz 3 ist bezüglich sämtlicher Teile aus Metall gefertigt und besteht im wesentlichen aus einem Gewindestab 5 und zwei an dessen Ende angeordneten Stützelemten 6, 7. Die perspektivische Darstellung zeigt, daß die Stützelemente 6, 7 eine Durchgangsbohrung 8 besitzen und stirnseitig jeweils eine ringförmige Lagerfläche 9 ausgebildet ist, die von einem Flansch 10 gebildet wird. An beiden Stirnflächen 9 stehen Dornen 11 ab, die zur sicheren Verankerung in den jeweils anliegenden Deckplatten 12 der Wirbel 1, 2 vorgesehen sind. The vertebral body replacement 3 is made of metal in all its parts and consists essentially of a threaded rod 5 and two support elements 6, 7 arranged at its end. The perspective view shows that the support elements 6, 7 have a through hole 8 and an annular bearing surface 9 is formed on the front side, which is formed by a flange 10. On both front surfaces 9 there are pins 11 which are intended for secure anchoring in the respective adjacent cover plates 12 of the vertebrae 1, 2.

In den Stützelementen 6, 7 befinden sich in Figur 1 nicht sichtbare Lagerkugeln, die den Stützelementen 6, 7 eine allseitige Verschwenkbarkeit ermöglichen.In the support elements 6, 7 there are bearing balls (not visible in Figure 1) which enable the support elements 6, 7 to pivot in all directions.

In Figur 2 ist am unteren Ende des Gewindestabes 5 die Lagerkugel 13 sichtbar, die ein Durchgangsgewinde 14 hat, in welches der Gewindestab 5 mit dem unteren GewindeabschnittIn Figure 2, the bearing ball 13 is visible at the lower end of the threaded rod 5, which has a through-thread 14 into which the threaded rod 5 with the lower thread section

15 eingreift. Der untere Gewindeabschnitt 15 ist als Linksgewinde ausgebildet, während der obere Gewindeabschnitt 16 ein Rechtsgewinde hat. Am oberen Ende des Gewindeabschnitts 16 befindet sich ebenfalls eine hier nicht sichtbare Lagerkugel, die in einer Bohrung des Stützelements 6 einliegt.15 engages. The lower threaded section 15 is designed as a left-hand thread, while the upper threaded section 16 has a right-hand thread. At the upper end of the threaded section 16 there is also a bearing ball (not visible here) which lies in a hole in the support element 6.

In gleicher Weise besitzt das untere Stützelement 7 eine Bohrung 17, die als Durchgangsbohrung ausgebildet ist und die im Bereich des Flansches 10 eine Verjüngung 18 hat.In the same way, the lower support element 7 has a bore 17 which is designed as a through-bore and which has a taper 18 in the area of the flange 10.

Das Stützelement 7 wird von unten auf die Lagerkugel 13 aufgeschoben, wobei dann der obere Öffnungsrand 19 nach innen gedrückt wird, so daß sich die Bohrung 17 im Bereich des Öffnungsrandes 19 verjüngt. Der Öffnungsrand 20 bei dem Stützelement 6 ist bereits entsprechend nach innen eingedrückt bzw. gebördelt. Auf diese Weise werden die Stützelemente 6, 7 auf den Lagerkugeln 13 drehbar und allseitig verschwenkbar befestigt und sind gleichzeitig auf den Lagerkugeln axial gesichert.The support element 7 is pushed onto the bearing ball 13 from below, whereby the upper opening edge 19 is then pressed inwards so that the bore 17 tapers in the area of the opening edge 19. The opening edge 20 of the support element 6 is already pressed inwards or flanged accordingly. In this way, the support elements 6, 7 are attached to the bearing balls 13 so that they can rotate and pivot in all directions and are simultaneously secured axially on the bearing balls.

Zwischen den Gewindeabschnitten 15, 16 ist eine schraubenmutterförmige Profilierung 21 ausgebildet, die es erlaubt, einen Schraubenschlüssel zum Verdrehen des Gewindestabes anzusetzen. Durch Drehung des Gewindestabes 5 bewirken das Linksgewinde und das Rechtsgewinde, daß entweder beide Stützelemente 6, 7 sich axial nach außen oder sich gemeinsam axial zueinander nach innen bewegen. Die Lagerkugeln 13 drehen sich dabei nicht mit dem Gewindestab 5 mit, da die Lagerkugeln aufgrund der zwischen ihrer Oberfläche und der Bohrung 17 auftretenden Reibung gegen Mitdrehen ausreichend gesichert sind.Between the threaded sections 15, 16, a screw-nut-shaped profile 21 is formed, which allows a wrench to be used to turn the threaded rod. By turning the threaded rod 5, the left-hand thread and the right-hand thread cause either both support elements 6, 7 to move axially outwards or to move axially inwards together with each other. The bearing balls 13 do not rotate with the threaded rod 5, since the bearing balls are sufficiently secured against rotation due to the friction occurring between their surface and the bore 17.

Claims (1)

248/02248/02 12. Juni 1991
Ott/ot12 June 1991
Ott/ot Schut&zgr;ansprücheProtection claims 1. Wirbelkörperersatz zur Implantation im Halswirbel- und
Brustwirbelbereich mit einem Gewindestab, an dessen beiden Enden jeweils ein Stützelement angeordnet ist, wobei der
Abstand beider Stützelemente veränderbar ist,
dadurch gekennzeichnet, daß an beiden Enden des Gewindestabs (5) Lagerkugeln (13) mit einer
Gewinde-Durchgangsbohrung (14) aufgeschraubt sind, und daß auf jeder Lagerkugel (13) ein allseitig verschwenkbares
Stützelement (6, 7) gelagert ist.1. Vertebral body replacement for implantation in the cervical and
Thoracic vertebrae with a threaded rod, at each end of which a support element is arranged, whereby the
Distance between both support elements can be changed,
characterized in that at both ends of the threaded rod (5) bearing balls (13) with a
threaded through hole (14) are screwed on, and that on each bearing ball (13) a pivotable
Support element (6, 7) is mounted. 2. Wirbelkörperersatz nach Anspruch 1, dadurch
gekennzeichnet, daß jedes Stützelement (6, 7) eine stirnseitige Lagerfläche (9) mit abstehenden Dornen
(11) hat.2. Vertebral body replacement according to claim 1, characterized
characterized in that each support element (6, 7) has a front bearing surface (9) with protruding mandrels
(11) has. 3. Wirbelkörperersatz nach Anspruch 2, dadurch
gekennzeichnet, daß jedes Stützelement (6, 7) eine Bohrung (17) hat, in der die Lagerkugel (13)3. Vertebral body replacement according to claim 2, characterized
characterized in that each support element (6, 7) has a bore (17) in which the bearing ball (13) einliegt, und daß der Öffnungsrand (20) der Bohrung an der dem Gewindestab zugewandten Seite sich verjüngt.and that the opening edge (20) of the bore tapers on the side facing the threaded rod. 4. Wirbelkörperersatz nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, daß die Bohrung (17) als Durchgangsbohrung ausgeführt ist, die im Bereich der ringförmigen Lagerfläche (9) einen kleineren4. Vertebral body replacement according to one of claims 1 or 2,
characterized in that the bore (17) is designed as a through-bore which has a smaller -b--b- Durchmesser hat als der Durchmesser der einliegenden Lagerkugel (13)diameter than the diameter of the inserted bearing ball (13) 5. Wirbelkörperersatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Stützelement (6, 7) einen seitlich überstehenden Flansch (10) hat, dessen Stirnfläche die Lagerfläche bildet.5. Vertebral body replacement according to one of the preceding claims, characterized in that the support element (6, 7) has a laterally projecting flange (10), the front surface of which forms the bearing surface. 6. Wirbelkörperersatz nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Gewindestab (5) zum einen Ende hin ein Linksgewinde (15) und zum anderen Ende hin ein Rechtsgewinde (16) hat, und daß in der Mitte des Gewindestabs (5) eine schraubenmutterförmige Profilierung (21) ausgebildet ist.6. Vertebral body replacement according to one of the preceding claims, characterized in that the threaded rod (5) has a left-hand thread (15) at one end and a right-hand thread (16) at the other end, and that a screw-nut-shaped profile (21) is formed in the middle of the threaded rod (5). 91 0? 494.91 0? 494.
DE9107494U 1991-06-18 1991-06-18 Vertebral body replacement Expired - Lifetime DE9107494U1 (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9112176U1 (en) * 1991-09-30 1991-11-14 Howmedica GmbH, 2314 Schönkirchen Vertebral body spacer
EP0567424A1 (en) * 1992-04-24 1993-10-27 Bilbao Ortiz de Zarate, José Ramon Vertebral prosthesis for the substitution of a vertebra in malignant tumour surgery
FR2714283A1 (en) * 1993-12-15 1995-06-30 Ind Tech Res Inst Load detector for bone grafts. i.e. spinal vertebrae
DE4409392A1 (en) * 1994-03-18 1995-09-21 Biedermann Motech Gmbh Adjustable vertebral body
US5480442A (en) * 1993-06-24 1996-01-02 Man Ceramics Gmbh Fixedly adjustable intervertebral prosthesis
DE19519101A1 (en) * 1995-05-24 1996-11-28 Harms Juergen Height-adjustable vertebral body replacement
EP0832622A2 (en) 1996-09-26 1998-04-01 Howmedica GmbH A spinal cage assembly
WO2000033752A1 (en) * 1998-12-04 2000-06-15 Wittenstein Gmbh & Co. Kg Distraction device
EP1682050A2 (en) * 2003-10-16 2006-07-26 Patrick J. Sweeney Vertebral prosthesis
US7758648B2 (en) 2006-04-27 2010-07-20 Warsaw Orthopedic, Inc. Stabilized, adjustable expandable implant and method
US7879096B2 (en) 2006-04-27 2011-02-01 Warsaw Orthopedic, Inc. Centrally driven expandable implant
US7914581B2 (en) 2006-04-27 2011-03-29 Warsaw Orthopedic, Inc. Expandable implant, instrument, and method
US7938858B2 (en) 2003-09-15 2011-05-10 Warsaw Orthopedic, Inc. Spinal implant system
US7981157B2 (en) 2006-04-27 2011-07-19 Warsaw Orthopedic, Inc. Self-contained expandable implant and method
US8142441B2 (en) 2008-10-16 2012-03-27 Aesculap Implant Systems, Llc Surgical instrument and method of use for inserting an implant between two bones
US8142435B2 (en) 2009-02-19 2012-03-27 Aesculap Implant Systems, Llc Multi-functional surgical instrument and method of use for inserting an implant between two bones
US8182537B2 (en) 2007-10-30 2012-05-22 Aesculap Implant Systems, Llc Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
US8337559B2 (en) 2005-04-21 2012-12-25 Globus Medical, Inc. Expandable vertebral prosthesis
US8591587B2 (en) 2007-10-30 2013-11-26 Aesculap Implant Systems, Llc Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
US9005291B2 (en) 2013-07-09 2015-04-14 Nlt Spine Ltd. Orthopedic implant with adjustable angle between tissue contact surfaces
US9408712B2 (en) 2010-07-15 2016-08-09 NLT-Spine Ltd. Surgical systems and methods for implanting deflectable implants
US9737411B2 (en) 2013-12-11 2017-08-22 Nlt Spine Ltd. Worm-gear actuated orthopedic implants and methods
US9820865B2 (en) 2013-10-31 2017-11-21 Nlt Spine Ltd. Adjustable implant
US10492923B2 (en) 2014-06-25 2019-12-03 Seaspine, Inc. Expanding implant with hinged arms
US10617530B2 (en) 2011-07-14 2020-04-14 Seaspine, Inc. Laterally deflectable implant

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9112176U1 (en) * 1991-09-30 1991-11-14 Howmedica GmbH, 2314 Schönkirchen Vertebral body spacer
EP0535315A1 (en) * 1991-09-30 1993-04-07 Howmedica GmbH Vertebral spacer
EP0567424A1 (en) * 1992-04-24 1993-10-27 Bilbao Ortiz de Zarate, José Ramon Vertebral prosthesis for the substitution of a vertebra in malignant tumour surgery
DE4417629B4 (en) * 1993-06-24 2006-03-16 SDGI Holdings, Inc., Wilmington Implant for the replacement of vertebral bodies
US5480442A (en) * 1993-06-24 1996-01-02 Man Ceramics Gmbh Fixedly adjustable intervertebral prosthesis
FR2714283A1 (en) * 1993-12-15 1995-06-30 Ind Tech Res Inst Load detector for bone grafts. i.e. spinal vertebrae
DE4409392A1 (en) * 1994-03-18 1995-09-21 Biedermann Motech Gmbh Adjustable vertebral body
DE19519101B4 (en) * 1995-05-24 2009-04-23 Harms, Jürgen, Prof. Dr. Height adjustable vertebral body replacement
DE19519101A1 (en) * 1995-05-24 1996-11-28 Harms Juergen Height-adjustable vertebral body replacement
US5989290A (en) * 1995-05-24 1999-11-23 Biedermann; Lutz Height-adjustable artificial vertebral body
EP0832622A2 (en) 1996-09-26 1998-04-01 Howmedica GmbH A spinal cage assembly
WO2000033752A1 (en) * 1998-12-04 2000-06-15 Wittenstein Gmbh & Co. Kg Distraction device
US7938858B2 (en) 2003-09-15 2011-05-10 Warsaw Orthopedic, Inc. Spinal implant system
EP1682050A2 (en) * 2003-10-16 2006-07-26 Patrick J. Sweeney Vertebral prosthesis
EP1682050A4 (en) * 2003-10-16 2010-04-28 Patrick J Sweeney Vertebral prosthesis
US8337559B2 (en) 2005-04-21 2012-12-25 Globus Medical, Inc. Expandable vertebral prosthesis
US7758648B2 (en) 2006-04-27 2010-07-20 Warsaw Orthopedic, Inc. Stabilized, adjustable expandable implant and method
US7879096B2 (en) 2006-04-27 2011-02-01 Warsaw Orthopedic, Inc. Centrally driven expandable implant
US7914581B2 (en) 2006-04-27 2011-03-29 Warsaw Orthopedic, Inc. Expandable implant, instrument, and method
US7981157B2 (en) 2006-04-27 2011-07-19 Warsaw Orthopedic, Inc. Self-contained expandable implant and method
US8268004B2 (en) 2006-04-27 2012-09-18 Warsaw Orthopedic, Inc. Stabilized, adjustable expandable implant and method
US8366779B2 (en) 2006-04-27 2013-02-05 Warsaw Orthopedic, Inc. Expandable implant, instrument, and method
US8231681B2 (en) 2006-04-27 2012-07-31 Warsaw Orthopedic Self-contained expandable implant and method
US9034046B2 (en) 2007-10-30 2015-05-19 Aesculap Implant Systems, Llc Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
US10881527B2 (en) 2007-10-30 2021-01-05 Aesculap Implant Systems, Llc Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
US10806595B2 (en) 2007-10-30 2020-10-20 Aesculap Implant Systems, Llc Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
US8591587B2 (en) 2007-10-30 2013-11-26 Aesculap Implant Systems, Llc Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
US8690950B2 (en) 2007-10-30 2014-04-08 Aesculap Implant Systems, Llc Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
US10201432B2 (en) 2007-10-30 2019-02-12 Aesculap Implant Systems, Llc Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
US8182537B2 (en) 2007-10-30 2012-05-22 Aesculap Implant Systems, Llc Vertebral body replacement device and method for use to maintain a space between two vertebral bodies within a spine
US8142441B2 (en) 2008-10-16 2012-03-27 Aesculap Implant Systems, Llc Surgical instrument and method of use for inserting an implant between two bones
US8702719B2 (en) 2008-10-16 2014-04-22 Aesculap Implant Systems, Llc Surgical instrument and method of use for inserting an implant between two bones
US8142435B2 (en) 2009-02-19 2012-03-27 Aesculap Implant Systems, Llc Multi-functional surgical instrument and method of use for inserting an implant between two bones
US9408712B2 (en) 2010-07-15 2016-08-09 NLT-Spine Ltd. Surgical systems and methods for implanting deflectable implants
US12029655B2 (en) 2011-07-14 2024-07-09 Seaspine, Inc. Laterally deflectable implant
US10617530B2 (en) 2011-07-14 2020-04-14 Seaspine, Inc. Laterally deflectable implant
US9005291B2 (en) 2013-07-09 2015-04-14 Nlt Spine Ltd. Orthopedic implant with adjustable angle between tissue contact surfaces
US10149770B2 (en) 2013-07-09 2018-12-11 Seaspine, Inc. Orthopedic implant with adjustable angle between tissue contact surfaces
US9820865B2 (en) 2013-10-31 2017-11-21 Nlt Spine Ltd. Adjustable implant
US9737411B2 (en) 2013-12-11 2017-08-22 Nlt Spine Ltd. Worm-gear actuated orthopedic implants and methods
US11622866B2 (en) 2014-06-25 2023-04-11 Seaspine, Inc. Expanding implant with hinged arms
US10492923B2 (en) 2014-06-25 2019-12-03 Seaspine, Inc. Expanding implant with hinged arms

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