WO2004103193A1 - Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra - Google Patents

Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra Download PDF

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Publication number
WO2004103193A1
WO2004103193A1 PCT/DE2004/000834 DE2004000834W WO2004103193A1 WO 2004103193 A1 WO2004103193 A1 WO 2004103193A1 DE 2004000834 W DE2004000834 W DE 2004000834W WO 2004103193 A1 WO2004103193 A1 WO 2004103193A1
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WO
WIPO (PCT)
Prior art keywords
bearing
rod
anchoring
grooves
bearing shell
Prior art date
Application number
PCT/DE2004/000834
Other languages
German (de)
French (fr)
Inventor
Peter Metz-Stavenhagen
Original Assignee
Peter Metz-Stavenhagen
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Peter Metz-Stavenhagen filed Critical Peter Metz-Stavenhagen
Priority to EP04730817A priority Critical patent/EP1624817A1/en
Priority to DE112004001374T priority patent/DE112004001374D2/en
Priority to US10/557,127 priority patent/US20070157543A1/en
Publication of WO2004103193A1 publication Critical patent/WO2004103193A1/en

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Classifications

    • 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
    • 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
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass

Definitions

  • Anchoring element for fastening a rod of a device for setting up a human or animal spine to a vertebral bone
  • the present invention relates to an anchoring element for fastening a rod of a device for setting up a human or animal spine to a vertebral bone, with a screw and a holding element, the screw element having a spherical segment-shaped bearing element and a conically tapering threaded shaft, and wherein the holding element is one Has holder for receiving the rod and a bearing shell for receiving the bearing element of the screw element.
  • An anchoring element is known from EP 0 885 598 A2, in which the screw element is designed to be detached from the holding element.
  • a bearing element arranged on the screw element is designed in the form of a spherical segment, so that the holding element can be pivoted in all directions with respect to the screw element.
  • Such anchoring elements are often also referred to as a polyaxial screw.
  • a spring-elastic clamping element is provided between the bearing element and the holding element, which clamps against the holding element after mounting the rod in such a way that the bearing element together with the screw element is held firmly and non-slip in the current position.
  • This makes it possible to position the rod for setting up a human or animal spine in almost any position relative to the actual screw element and still achieve sufficient anchoring on the spine.
  • the arrangement of such a clamping element between the bearing element and the holding element is structurally very complex and requires a large amount of material. If you consider that such polyaxial screws are usually made of titanium, this is associated with very high costs. Proceeding from this, the object of the present invention is to create an anchoring element which has a lower material requirement and is easier to manufacture.
  • An anchoring element designed according to this technical solution has the advantage that a clamping element known from the prior art can be dispensed with due to the direct mounting of the bearing element in the bearing shell. In addition to saving the material of the very expensive titanium, this also simplifies the design, so that the anchoring element according to the invention can be produced much more cost-effectively.
  • a rod is inserted into the preferably U-shaped holder and fixed with a screwable securing element.
  • This rod presses on the spherical segment-shaped bearing element and presses it into the bearing shell. This creates an increased friction between the bearing element and the bearing shell, by means of which the holding element is held in the current position with respect to the screw element.
  • the bearing element only comes into contact with the bearing shell with part of its surface, the pressure exerted by the rod on the bearing element is sufficient to prevent the holding element from slipping against the screw element as soon as the rod is firmly fixed in the holder is.
  • the surface of the bearing element and / or the bearing shell with depressions or to roughen it, in particular on the surface of the Bearing element and / or the bearing shell to provide a number of grooves or grooves.
  • This surface design further reduces the contact surface between the bearing element and the bearing shell, so that the pressure exerted by the rod on the bearing element leads to increased surface pressure on the remaining contact surface, which ultimately leads to a higher frictional connection and reliably fixes the holding element relative to the screw element ,
  • Figure 1 is a front view of an anchoring element according to the invention with an exploded fuse element.
  • Fig. 2a the anchoring element according to FIG. 1, cut along line
  • FIG. 3 shows a top view of the anchoring element according to FIG. 1, cut along line III-III in FIG. 1;
  • FIG. 4a shows a perspective partial view of the anchoring element according to FIG. 2a
  • 4b shows a perspective partial view of the anchoring element according to FIG. 2b
  • Fig. 5 is a perspective view of the bearing element of the
  • FIG. 6a is a partially sectioned, perspective partial view of a second embodiment of an inventive
  • FIG. 6b is a partially sectioned, perspective partial view of the
  • Anchoring element according to FIG. 6a in a second position.
  • the anchoring element shown in Figures 1 to 5 is part of a device for setting up a human or animal spine.
  • This anchoring element is used to fasten a longer rod to a vertebral bone and comprises a holding element 10 with a holder 12 for receiving a rod (not shown here) and a bearing shell 14 integrally connected to the holder 12 and a screw element 16 with a conically tapered threaded shaft 18 and one integrally connected to the threaded shaft 18, spherical segment-shaped bearing element 20.
  • the thread of the threaded shaft 18 is designed, for example, as a bio thread, cancellous thread or the like, and a key receptacle 22 for an internal hexagon is provided on an upper side of the bearing element 20, so that the screw element can be easily fitted into one Vertebral body can be inserted and fixed there.
  • the holder 12 is U-shaped and comprises two coaxially arranged webs 24, 26, on the inside of which a sawtooth thread 28 is formed. This sawtooth thread 28 is described in detail in EP 0 885 598 A2.
  • a securing element designed as a grub screw 30 can be screwed into the holder 12 in the axial direction in order to fix the rod inserted into the holder 12.
  • the bearing element 20 is provided on its spherical segment surface with a number of grooves 32 which run obliquely. there the grooves 32 on one half of the bearing element 20 are oriented differently than on the opposite half of this bearing element 20.
  • FIGS. 6a and 6b A further embodiment of the anchoring element according to the invention is shown in FIGS. 6a and 6b. This differs from the first embodiment in that all the grooves 32 are arranged in opposite directions over the entire surface of the bearing element, so that a corrugation 34 is formed on the surface of the bearing element.
  • the rod is inserted into the holder 12 and held roughly with the grub screw 30 first of all.
  • the grub screw 30 is tightened so that the rod and the spine are fixed in the desired position.
  • the grub screw 30 presses on the rod (not shown here) and this in turn presses the bearing element 20 into the bearing shell 14.
  • the surface of the bearing element 20 provided with the grooves 32 or corrugations 34 is pressed into the bearing shell 14 in such a way that a very high one Surface pressure arises. By means of this high surface pressure, a> fixation of the bearing shell 14 with respect to the bearing element 20 is achieved, so that the holding element 10 is held in the desired position with respect to the screw element 16.

Abstract

The invention relates to an anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra, comprising a screwed element (16) and a retaining element, whereby the screwed element (16) has a bearing element in the form of a spherical segment and a conically-tapering threaded shaft (18) and the retaining element has a mounting (12), for housing the rod and a bearing shell (14), for housing the bearing element of the screwed element (16). According to the invention, an anchoring element with low material requirements and simple to produce can be achieved, whereby the bearing shell (14) is embodied to correspond to the bearing element such that the bearing element may be directly mounted in the bearing shell (14).

Description

Verankerungselement zur Befestigung eines Stabes einer Vorrichtung zum Einrichten einer menschlichen oder tierischen Wirbelsäule an einem WirbelknochenAnchoring element for fastening a rod of a device for setting up a human or animal spine to a vertebral bone
Die vorliegende Erfindung betrifft ein Verankerungselement zur Befestigung eines Stabes einer Vorrichtung zum Einrichten einer menschlichen oder tierischen Wirbelsäule an einem Wirbelknochen, mit einem Schraub- und einem Halteelement, wobei das Schraubelement ein kugelsegmentförmiges Lagerelement und einen sich konisch verjüngenden Gewindeschaft aufweist, und wobei das Halteelement eine Halterung zur Aufnahme des Stabes und eine Lagerschale zur Aufnahme des Lagerelementes des Schraubelementes aufweist.The present invention relates to an anchoring element for fastening a rod of a device for setting up a human or animal spine to a vertebral bone, with a screw and a holding element, the screw element having a spherical segment-shaped bearing element and a conically tapering threaded shaft, and wherein the holding element is one Has holder for receiving the rod and a bearing shell for receiving the bearing element of the screw element.
Aus dem EP 0 885 598 A2 ist ein Verankerungselement bekannt, bei dem das Schraubelement losgelöst vom Halteelement ausgebildet ist. Dabei ist ein am Schraubelement angeordnetes Lagerelement kugelsegmentförmig ausgebildet, so dass das Halteelement gegenüber dem Schraubelement in alle Richtungen schwenkbar ist. Derartige Verankerungselemente werden häufig auch als Polyaxialschraube bezeichnet.An anchoring element is known from EP 0 885 598 A2, in which the screw element is designed to be detached from the holding element. A bearing element arranged on the screw element is designed in the form of a spherical segment, so that the holding element can be pivoted in all directions with respect to the screw element. Such anchoring elements are often also referred to as a polyaxial screw.
Bei der Polyaxialschraube gemäß dem EP 0885598 A2 ist zwischen dem Lagerelement und dem Halteelement ein federelastisches Klemmelement vorgesehen, welches sich nach Montage des Stabes derart gegenüber dem Halteelement verklemmt, dass das Lagerelement zusammen mit dem Schraubelement in der derzeitigen Position fest und unverrutschbar gehalten wird. Hierdurch ist es möglich, den Stab zum Einrichten einer menschlichen oder tierischen Wirbelsäule in nahezu jeder beliebigen Position gegenüber dem eigentlichen Schraubelement zu positionieren und dennoch eine ausreichende Verankerung an der Wirbelsäule zu erreichen. Die Anordnung eines solchen Klemmelementes zwischen dem Lagerelement und dem Halteelement ist konstruktiv sehr aufwendig und erfordert einen hohen Materialeinsatz. Bedenkt man, dass solche Polyaxialschrauben in der Regel aus Titan gefertigt werden, so sind hiermit sehr hohe Kosten verbunden. Davon ausgehend liegt der vorliegenden Erfindung die Aufgabe zu Grunde, ein Verankerungselement zu schaffen, welches einen geringeren Materialbedarf hat und einfacher zu fertigen ist.In the polyaxial screw according to EP 0885598 A2, a spring-elastic clamping element is provided between the bearing element and the holding element, which clamps against the holding element after mounting the rod in such a way that the bearing element together with the screw element is held firmly and non-slip in the current position. This makes it possible to position the rod for setting up a human or animal spine in almost any position relative to the actual screw element and still achieve sufficient anchoring on the spine. The arrangement of such a clamping element between the bearing element and the holding element is structurally very complex and requires a large amount of material. If you consider that such polyaxial screws are usually made of titanium, this is associated with very high costs. Proceeding from this, the object of the present invention is to create an anchoring element which has a lower material requirement and is easier to manufacture.
Als technische Lösung dieser Aufgabe wird erfindungsgemäß ein Verankerungselement gemäß den Merkmalen des Anspruches 1 vorgeschlagen. Vorteilhafte Weiterbildungen des erfindungsgemäßen Verankerungselementes sind den Unteransprüchen zu entnehmen.An anchoring element according to the features of claim 1 is proposed as a technical solution to this problem. Advantageous developments of the anchoring element according to the invention can be found in the subclaims.
Ein nach dieser technischen Lösung ausgebildetes Verankerungselement hat den Vorteil, dass durch die direkte Lagerung des Lagerelementes in der Lagerschale ein aus dem Stand der Technik bekanntes Klemmelement verzichtet werden kann. Hierdurch wird neben einer Materialeinsparung des sehr teuren Titan auch eine konstruktive Vereinfachung erreicht, so dass das erfindungsgemäße Verankerungselement sehr viel kostengünstiger herstellbar ist.An anchoring element designed according to this technical solution has the advantage that a clamping element known from the prior art can be dispensed with due to the direct mounting of the bearing element in the bearing shell. In addition to saving the material of the very expensive titanium, this also simplifies the design, so that the anchoring element according to the invention can be produced much more cost-effectively.
Bei dem erfindungsgemäßen Verankerungselement wird in die vorzugsweise U- förmige Halterung ein Stab eingelegt und mit einem schraubbaren Sicherungselement fixiert. Dabei drückt dieser Stab auf das kugelsegmentförmige Lagerelement und presst dieses in die Lagerschale. Hierdurch entsteht zwischen Lagerelement und Lagerschale eine erhöhte Reibung, durch die das Halteelement gegenüber dem Schraubelement in der momentanen Position gehalten wird. Obwohl das Lagerelement nur mit einem Teil seiner Oberfläche an der Lagerschale zur Anlage kommt, reicht der durch den Stab über das Lagerelement ausgeübte Druck auf die Lagerschale aus, um ein Verrutschen des Halteelementes gegenüber dem Schraubelement zu verhindern, sobald der Stab fest in der Halterung fixiert ist.In the anchoring element according to the invention, a rod is inserted into the preferably U-shaped holder and fixed with a screwable securing element. This rod presses on the spherical segment-shaped bearing element and presses it into the bearing shell. This creates an increased friction between the bearing element and the bearing shell, by means of which the holding element is held in the current position with respect to the screw element. Although the bearing element only comes into contact with the bearing shell with part of its surface, the pressure exerted by the rod on the bearing element is sufficient to prevent the holding element from slipping against the screw element as soon as the rod is firmly fixed in the holder is.
In einer bevorzugten Weiterbildung hat es sich als vorteilhaft erwiesen, die Oberfläche des Lagerelementes und/oder der Lagerschale mit Vertiefungen zu versehen oder aufgeraut auszuführen, insbesondere auf der Oberfläche des Lagerelementes und/oder der Lagerschale eine Anzahl Rillen oder Nuten vorzusehen. Durch diese Oberflächengestaltung wird die Anlagefläche zwischen Lagerelement und Lagerschale weiter verringert, so dass der vom Stab auf das Lagerelement ausgeübte Druck zu einer erhöhten Flächenpressung auf der verbleibenden Kontaktfläche führt, was letztendlich zu einem höheren Kraftschluss führt und eine zuverlässige Fixierung des Halteelementes gegenüber dem Schraubelement bewirkt.In a preferred development, it has proven to be advantageous to provide the surface of the bearing element and / or the bearing shell with depressions or to roughen it, in particular on the surface of the Bearing element and / or the bearing shell to provide a number of grooves or grooves. This surface design further reduces the contact surface between the bearing element and the bearing shell, so that the pressure exerted by the rod on the bearing element leads to increased surface pressure on the remaining contact surface, which ultimately leads to a higher frictional connection and reliably fixes the holding element relative to the screw element ,
Dabei hat es sich als sehr vorteilhaft erwiesen, die Rillen oder Nuten schräg verlaufen zu lassen, insbesondere die Rillen oder Nuten auf den gegenüberliegenden Seiten des Lagerelementes gegenläufig anzuordnen. Hierdurch wird ein noch besserer Kraftschluss zwischen Lagerelement und Lagerschale bei montiertem Stab erreicht.It has proven to be very advantageous to have the grooves or grooves run obliquely, in particular to arrange the grooves or grooves in opposite directions on the opposite sides of the bearing element. This results in an even better frictional connection between the bearing element and the bearing shell when the rod is mounted.
Weitere Vorteile des erfindungsgemaßen Verankerungselementes ergeben sich aus der beigefügten Zeichnung und den nachstehend beschriebenenFurther advantages of the anchoring element according to the invention result from the attached drawing and those described below
Ausführungsformen. Ebenso können die vorstehend genannten und die noch weiter ausgeführten Merkmale erfindungsgemäß jeweils einzeln oder in beliebigen Kombinationen miteinander verwendet werden. Die erwähnten Ausführungsformen sind nicht als abschließende Aufzählung zu verstehen, sondern haben vielmehr beispielhaften Charakter. Es zeigen:Embodiments. Likewise, according to the invention, the features mentioned above and those which are explained further can be used individually or in any combination with one another. The mentioned embodiments are not to be understood as an exhaustive list, but rather have an exemplary character. Show it:
Fig. 1 eine Frontansicht eines erfindungsgemäßen Verankerungselementes mit einem explosionsartig herausgezogenen Sicherungselement; Fig. 2a das Verankerungselement gemäß Fig. 1 , geschnitten entlang LinieFigure 1 is a front view of an anchoring element according to the invention with an exploded fuse element. Fig. 2a, the anchoring element according to FIG. 1, cut along line
II - II in Fig. 1 in einer ersten Position;II - II in Figure 1 in a first position;
Fig. 2b das Verankerungselement gemäß Fig. 1 , geschnitten entlang LinieFig. 2b, the anchoring element of FIG. 1, cut along line
II - II in Fig. 1 in einer zweiten Position;II - II in Figure 1 in a second position;
Fig. 3 eine Draufsicht auf das Verankerungselement gemäß Fig. 1 , geschnitten entlang Linie III - III in Fig. 1 ;3 shows a top view of the anchoring element according to FIG. 1, cut along line III-III in FIG. 1;
Fig. 4a eine perspektivische Teilansicht des Verankerungselementes gemäß Fig 2a; Fig. 4b eine perspektivische Teilansicht des Verankerungselementes gemäß Fig 2b; Fig. 5 eine perspektivische Ansicht des Lagerelementes des4a shows a perspective partial view of the anchoring element according to FIG. 2a; 4b shows a perspective partial view of the anchoring element according to FIG. 2b; Fig. 5 is a perspective view of the bearing element of the
Verankerungselementes gemäß Fig. 1 ; Fig. 6a eine teilweise geschnittene, perspektivische Teilansicht einer zweiten Ausführungsform eines erfindungsgemäßenAnchoring element according to FIG. 1; Fig. 6a is a partially sectioned, perspective partial view of a second embodiment of an inventive
Verankerungselementes in einer ersten Position; Fig. 6b eine teilweise geschnittene, perspektivische Teilansicht desAnchoring element in a first position; Fig. 6b is a partially sectioned, perspective partial view of the
Verankerungselementes gemäß Fig. 6a in einer zweiten Position.Anchoring element according to FIG. 6a in a second position.
Das in den Figuren 1 bis 5 dargestellte Verankerungselement ist Bestandteil einer Vorrichtung zum Einrichten einer menschlichen oder tierischen Wirbelsäule. Dieses Verankerungselement dient der Befestigung eines längeren Stabes an einen Wirbelknochen und umfasst ein Halteelement 10 mit einer Halterung 12 zur Aufnahme eines hier nicht dargestellten Stabes und eine einstückig mit der Halterung 12 verbundene Lagerschale 14 und ein Schraubelement 16 mit einem sich konisch verjüngenden Gewindeschaft 18 und einem einstückig mit dem Gewindeschaft 18 verbundenen, kugelsegmentförmigen Lagerelement 20. Das Gewinde des Gewindeschaftes 18 ist beispielsweise als Biogewinde, Spongiosagewinde oder dergleichen ausgebildet und an einer Oberseite des Lagerelementes 20 ist eine Schlüsselaufnahme 22 für ein Innensechskant vorgesehen, so dass das Schraubelement in einfacher Weise in einen Wirbelkörper eingebracht und dort fixiert werden kann.The anchoring element shown in Figures 1 to 5 is part of a device for setting up a human or animal spine. This anchoring element is used to fasten a longer rod to a vertebral bone and comprises a holding element 10 with a holder 12 for receiving a rod (not shown here) and a bearing shell 14 integrally connected to the holder 12 and a screw element 16 with a conically tapered threaded shaft 18 and one integrally connected to the threaded shaft 18, spherical segment-shaped bearing element 20. The thread of the threaded shaft 18 is designed, for example, as a bio thread, cancellous thread or the like, and a key receptacle 22 for an internal hexagon is provided on an upper side of the bearing element 20, so that the screw element can be easily fitted into one Vertebral body can be inserted and fixed there.
Die Halterung 12 ist U-förmig ausgebildet und umfasst zwei koaxial angeordnete Stege 24, 26, an deren Innenseite ein Sägezahngewinde 28 ausgebildet ist. Dieses Sägezahngewinde 28 ist detailliert in der EP 0 885 598 A2 beschrieben. In der Halterung 12 kann in axialer Richtung ein als Madenschraube 30 ausgeführtes Sicherungselement eingeschraubt werden, um den in die Halterung 12 eingelegten Stab zu fixieren.The holder 12 is U-shaped and comprises two coaxially arranged webs 24, 26, on the inside of which a sawtooth thread 28 is formed. This sawtooth thread 28 is described in detail in EP 0 885 598 A2. A securing element designed as a grub screw 30 can be screwed into the holder 12 in the axial direction in order to fix the rod inserted into the holder 12.
Das Lagerelement 20 ist auf seiner kugelsegmentförmig ausgebildeten Oberfläche mit einer Anzahl Rillen 32 versehen, welche schräg verlaufen. Dabei sind die Rillen 32 auf einer Hälfte des Lagerelementes 20 anders ausgerichtet, als auf der gegenüberliegenden Hälfte dieses Lagerelementes 20.The bearing element 20 is provided on its spherical segment surface with a number of grooves 32 which run obliquely. there the grooves 32 on one half of the bearing element 20 are oriented differently than on the opposite half of this bearing element 20.
In den Figuren 6a und 6b ist eine weitere Ausführungsform des erfindungs- gemäßen Verankerungselementes dargestellt. Dieses unterscheidet sich von der ersten Ausführungsform dadurch, dass über die gesamte Oberfläche des Lagerelementes verteilt sämtliche Rillen 32 gegenläufig angeordnet sind, so dass auf der Oberfläche des Lagerelementes eine Riffelung 34 entsteht.A further embodiment of the anchoring element according to the invention is shown in FIGS. 6a and 6b. This differs from the first embodiment in that all the grooves 32 are arranged in opposite directions over the entire surface of the bearing element, so that a corrugation 34 is formed on the surface of the bearing element.
Nachdem der operierende Arzt das Schraubelement 16 mittels eines*Sechs- kantschlüssels an der gewünschten Stelle in den Wirbelknochen eingeschraubt hat, wird der Stab in die Halterung 12 eingelegt und mit der Madenschraube 30 zunächst einmal grob gehalten. Nachdem die Wirbelsäule, der Stab und das Halteelement 10 in der gewünschten Weise ausgerichtet sind, wird die Madenschraube 30 fest angezogen, so dass der Stab und die Wirbelsäule in der gewünschten Position fixiert werden. Dabei drückt die Madenschraube 30 auf den hier nicht dargestellten Stab und dieser wiederum presst das Lagerelement 20 in die Lagerschale 14. Dabei wird die mit den Rillen 32 oder einer Riffelung 34 versehene Oberfläche des Lagerelementes 20 derart in der Lagerschale 14 eingedrückt, dass eine sehr hohe Flächenpressung entsteht. Mittels dieser hohen Flächenpressung wird eine>Fixierung der Lagerschale 14 gegenüber dem Lagerelement 20 erreicht, so dass das Halteelement 10 gegenüber dem Schraubelement 16 in der gewünschten Position gehalten wird. After the surgeon has screwed the screw 16 by means of a hexagonal key * at the desired location in the vertebral bone, the rod is inserted into the holder 12 and held roughly with the grub screw 30 first of all. After the spine, the rod and the holding element 10 are aligned in the desired manner, the grub screw 30 is tightened so that the rod and the spine are fixed in the desired position. The grub screw 30 presses on the rod (not shown here) and this in turn presses the bearing element 20 into the bearing shell 14. The surface of the bearing element 20 provided with the grooves 32 or corrugations 34 is pressed into the bearing shell 14 in such a way that a very high one Surface pressure arises. By means of this high surface pressure, a> fixation of the bearing shell 14 with respect to the bearing element 20 is achieved, so that the holding element 10 is held in the desired position with respect to the screw element 16.
Bezugszeichenliste:LIST OF REFERENCE NUMBERS
10 Halteelement10 holding element
12 Halterung12 bracket
14 Lagerschale14 bearing shell
16 Schraubelement16 screw element
18 Gewindeschaft18 threaded shaft
20 Lagerelement20 bearing element
22 Schlüsselaufnahme22 key holder
24 Steg24 bridge
26 Steg26 footbridge
28 Sägezahngewinde28 sawtooth threads
30 Madenschraube30 grub screw
32 Rillen32 grooves
34 Riffelung 34 corrugation

Claims

Ansprüche: Expectations:
1. Verankerungselement zur Befestigung eines Stabes einer Vorrichtung zum Einrichten einer menschlichen oder tierischen Wirbelsäule an einem Wirbelknochen, mit einem Schraubelement (16) und mit einem Halteelement (10), wobei das Schraubelement (16) ein kugelsegmentförmiges Lagerelement (20) und einen sich konisch verjüngenden Gewindeschaft (18) aufweist, und wobei das Halteelement (10) eine Halterung (12) zur Aufnahme des Stabes und eine Lagerschale (14) zur Aufnahme des Lagerelementes (20) des Schraubelementes (16) aufweist, dadurch gekennzeichnet, dass die Lagerschale (14) korrespondierend zum Lagerelement (20) ausgebildet ist, so dass das Lagerelement (20) direkt in der Lagerschale (14) lagerbar ist.1. Anchoring element for fastening a rod of a device for setting up a human or animal spine on a vertebral bone, with a screw element (16) and with a holding element (10), wherein the screw element (16) is a spherical segment-shaped bearing element (20) and a conical Tapered threaded shaft (18), and wherein the holding element (10) has a holder (12) for receiving the rod and a bearing shell (14) for receiving the bearing element (20) of the screw element (16), characterized in that the bearing shell ( 14) is designed to correspond to the bearing element (20), so that the bearing element (20) can be stored directly in the bearing shell (14).
2. Verankerungselement nach Anspruch 1 , dadurch gekennzeichnet, dass das Lagerelement (20) und/oder die Lagerschale (14) auf seiner Oberfläche Vertiefungen oder Rauhigkeiten aufweist.2. Anchoring element according to claim 1, characterized in that the bearing element (20) and / or the bearing shell (14) has depressions or roughnesses on its surface.
3. Verankerungselement nach wenigstens einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass das Lagerelement (20) und/oder die Lagerschale (14) auf seiner3. Anchoring element according to at least one of the preceding claims, characterized in that the bearing element (20) and / or the bearing shell (14) on it
Oberfläche eine Anzahl Rillen (32) oder Nuten aufweist.Surface has a number of grooves (32) or grooves.
4. Verankerungselement nach Anspruch 3, dadurch gekennzeichnet, dass die Rillen (32) oder Nuten schräg verlaufen. Verankerungselement nach Anspruch 4, dadurch gekennzeichnet, dass die Rillen (32) oder Nuten auf gegenüberliegenden Seiten des Lagerelementes (20) oder der Lagerschale (14) gegenläufig angeordnet sind. 4. Anchoring element according to claim 3, characterized in that the grooves (32) or grooves run obliquely. Anchoring element according to claim 4, characterized in that the grooves (32) or grooves on opposite sides of the bearing element (20) or the bearing shell (14) are arranged in opposite directions.
PCT/DE2004/000834 2003-05-19 2004-05-03 Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra WO2004103193A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP04730817A EP1624817A1 (en) 2003-05-19 2004-05-03 Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra
DE112004001374T DE112004001374D2 (en) 2003-05-19 2004-05-03 Anchoring member for attaching a rod of a device for establishing a human or animal spine on a vertebral bone
US10/557,127 US20070157543A1 (en) 2003-05-19 2004-05-03 Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE20307776U DE20307776U1 (en) 2003-05-19 2003-05-19 Anchoring element for fastening a rod of a device for setting up a human or animal spine to a vertebral bone
DE20307776.8 2003-05-19

Publications (1)

Publication Number Publication Date
WO2004103193A1 true WO2004103193A1 (en) 2004-12-02

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PCT/DE2004/000834 WO2004103193A1 (en) 2003-05-19 2004-05-03 Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra

Country Status (4)

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US (1) US20070157543A1 (en)
EP (1) EP1624817A1 (en)
DE (2) DE20307776U1 (en)
WO (1) WO2004103193A1 (en)

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Also Published As

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US20070157543A1 (en) 2007-07-12
DE20307776U1 (en) 2004-09-23
DE112004001374D2 (en) 2006-04-13
EP1624817A1 (en) 2006-02-15

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