DE3614101C1 - Pedikelschraube - Google Patents
PedikelschraubeInfo
- Publication number
- DE3614101C1 DE3614101C1 DE3614101A DE3614101A DE3614101C1 DE 3614101 C1 DE3614101 C1 DE 3614101C1 DE 3614101 A DE3614101 A DE 3614101A DE 3614101 A DE3614101 A DE 3614101A DE 3614101 C1 DE3614101 C1 DE 3614101C1
- Authority
- DE
- Germany
- Prior art keywords
- pedicle screw
- screw according
- receiving part
- receiving
- threaded shaft
- 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
Links
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
- A61B17/70—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
- A61B17/7002—Longitudinal elements, e.g. rods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7002—Longitudinal elements, e.g. rods
- A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
- A61B17/7008—Longitudinal elements, e.g. rods with a cross-section which varies along its length with parts of, or attached to, the longitudinal elements, bearing against an outside of the screw or hook heads, e.g. nuts on threaded rods
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
- A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass
-
- 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
-
- 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
- A61B17/7038—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other to a different extent in different directions, e.g. within one plane only
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Neurology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- Heart & Thoracic Surgery (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Molecular Biology (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Vascular Medicine (AREA)
- Surgical Instruments (AREA)
- Prostheses (AREA)
- Pivots And Pivotal Connections (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Description
Die Erfindung betrifft eine Pedikelschraube zur Stabilisierung von Wirbelsäulensegmenten mit einem Gewindeschaft
teil und einem kopfseitig vorgesehenen Aufnahmeteil für eine Stange.
Derartige Schrauben werden zur mono- oder multisegmentalen Stabili
sierung der Wirbelsäule verwendet.
Eine Pedikelschraube der eingangs beschriebenen Art ist aus der
DE-AS 26 49 042 bekannt. Die Schraube weist einen Gewindeteil und
einen starr damit am kopfseitigen Ende vorgesehenen Aufnahmeteil
auf. Es werden mehrere Paare solcher Schrauben jeweils in einem
Abstand voneinander beidseitig von der Wirbelsäule in die Wirbel
körper eingeschraubt. Die jeweiligen Aufnahmeteile weisen Aufnahme
schlitze auf. Durch diese Aufnahmeschlitze der rechten bzw. linken
Gruppe der Schrauben wird jeweils eine Gewindestange geführt. Mit
Hilfe von Fixierungsschrauben wird die Stange dann am jeweiligen
Aufnahmeteil fixiert. Ferner sind den Schraubenköpfen unterlegbare
und der Form der Wirbelkörper etwa angepaßte Druckverteilungsplatten
vorgesehen. Ein Nachteil dieser Lösung besteht darin, daß es sehr
schwierig ist, die Schrauben einerseits fest in die Wirbelkörper
einzuschrauben und andererseits die Schrauben in zwei Ebenen gerade
so zu stellen, daß die Achsen der Aufnahmeschlitze in den über
einander befindlichen Aufnahmeteilen so ausgerichtet sind, daß die
Gewindestange ohne Verspannung der Schrauben durch die Aufnahme
schlitze hindurch führbar ist. Schon der Versuch erfordert sehr viel
Zeit, was bei einer Operation an der Wirbelsäule ein großer Nachteil
ist. Darüber hinaus läßt sich eine so genaue Ausrichtung fast nicht
erreichen. Das Ergebnis ist, daß erhebliche Scherkräfte auf die
Gewindestangen ausgeübt werden, was dazu führt, daß in der späteren
Benutzung nach Abschluß der Operation die Stangen sogar abbrechen
könnten bzw. nicht die volle Stabilisierung ermöglichen. Die erfor
derlichen Druckverteilungsplatten sind darüber hinaus zusätzliche
bewegliche Teile, die die Operation erschweren.
Aufgabe der Erfindung ist es, eine Pedikelschraube der eingangs
beschriebenen Art zu schaffen, die das Einsetzen erleichtert und
gleichzeitig auch die Gefahren beim späteren Benutzen vermindert
bzw. ausschließt.
Diese Aufgabe wird durch eine Pedikelschraube der eingangs be
schriebenen Art gelöst, die gemäß der Erfindung dadurch gekenn
zeichnet ist, daß das Gewindeschaftteil und das Aufnahmeteil
gelenkig miteinander verbunden sind.
Durch diese Lösung wird erreicht, daß die Schraube zunächst oh
ne Rücksicht auf die Stellung des Aufnahmeteiles eingeschraubt
werden kann und das Aufnahmeteil anschließend leicht in eine
für die Aufnahme der Gewindestange erforderliche Stellung
bringbar ist. Dadurch wird die Operationszeit wesentlich ver
kürzt, und die auf die Gewindestange wirkenden Kräfte werden
wesentlich verringert.
Weitere Merkmale und Zweckmäßigkeiten der Erfindung ergeben
sich aus der Beschreibung von Ausführungsbeispielen anhand der
Figuren. Von den Figuren zeigen:
Fig. 1 eine Pedikelschraube in Explosionsdarstellung, teil
weise im Schnitt, in vergrößerter Darstellung;
Fig. 2 das Aufnahmeteil um 90° gedreht gegen die in Fig. 1
gezeigte Stellung; und
Fig. 3 die in Fig. 1 gezeigte Schraube in zusammengesetzter
Darstellung.
Die Pedikelschraube 1 weist ein Gewindeschaftteil 2 und ein
Aufnahmeteil 3 auf.
Das Gewindeschaftteil 2 weist einen in bekannter Weise ausge
bildeten Gewindeteil 4 zum Einschrauben in die Wirbelkörper
auf. Am kopfseitigen Ende des Gewindeteiles ist ein Sechskant
kopf 5 vorgesehen. An der dem Gewindeteil abgewandten Seite
schließt sich ein Ansatz 6 mit einem Außengewinde 7 an. Der An
satz 6 weist auf seiner dem Gewindeteil entgegengesetzten Seite
eine kugelsegmentförmige Ausnehmung 8 auf. Der Gewindeteil 4,
der Sechskantkopf 5, der Ansatz 6 und die Ausnehmung 8 sind in
der in Fig. 1 gezeigten Weise koaxial zueinander ausgerichtet.
Zu dem Gewindeschaftteil zugehörig ist eine Sicherungsmutter 9
vorgesehen. Dabei handelt es sich um eine Sechskantschraube,
die auf ihrer dem Gewindeschaftteil 2 zugewandten Seite eine
ein Innengewinde 10 aufweisende Ausnehmung 11 aufweist. Das In
nengewinde ist in seinen Abmessungen passend zu dem Außengewin
de 7 gewählt. An den Grund der Ausnehmung 11 schließt sich ein
kugelsegmentförmiger Abschnitt 12 an. Der Radius des Kugelseg
mentes entspricht im wesentlichen dem Radius der Ausnehmung 8.
Die offene Seite der kugelsegmentförmigen Ausnehmung ist der
Ausnehmung 8 entgegengesetzt. Auf der dem Ansatz 6 abgewandten
Seite schließt sich an die Ausnehmung 12 eine Bohrung 13 an.
Die Ausnehmung 11 mit dem Innengewinde 10, die kugelsegment
förmige Ausnehmung 12 und die Bohrung 13 sind koaxial zu
einander ausgerichtet.
Es ist ein Verbindungselement 14 vorgesehen. Dieses weist einen
kugelsegmentförmigen bzw. kugelförmigen Abschnitt 15 und einen
daran anschließenden und mit diesem einstückig ausgebildeten
zylindrischen Abschnitt 16 auf. In dem zylindrischen Abschnitt
ist eine sich senkrecht zur Achse des zylindrischen Abschnittes
erstreckende Bohrung 17 zur Aufnahme eines Sperrstiftes 18 vor
gesehen. Der Radius des Abschnittes 15 ist nahezu gleich und
nur unwesentlich kleiner als die Radien der beiden Ausnehmungen
8 und 12. Der Durchmesser des zylindrischen Abschnittes 16 ist
kleiner als der Durchmesser der Bohrung 13, so daß das Ver
bindungselement mit dem zylindrischen Abschnitt voran durch die
Ausnehmung 11 und durch die Bohrung 13 gesteckt werden kann und
aus der Bohrung 13 nach außen hervorsteht. Die Gewinde 7 und 10
sind in Abhähgigkeit von den Durchmessern der Ausnehmungen 8
und 12 und des kugelsegmentförmigen Abschnittes 15 so gewählt,
daß bei eingesetztem Verbindungselement und Aufschrauben der
Sicherungsmutter 9 in einer Stellung gerade noch eine Bewegung
des zylindrischen Abschnittes innerhalb eines Kegels um den
Mittelpunkt des kugelsegmentförmigen Abschnittes 15 möglich
ist. Das Ausmaß der Bewegung wird vorbestimmt durch das Ausmaß,
um welches die Bohrung 13 größer ist als der Außendurchmesser
des zylindrischen Abschnittes 16.
Die Sicherungsmutter 9 kann so angezogen werden, daß eine im
wesentlichen starre Verbindung zwischen Verbindungselement 14
und dem Gewindeteil 4 entsteht.
Das Aufnahmeteil 3 ist zylindrisch ausgebildet, wobei seine
Symmetrieachse mit der Symmetrieachse des Gewindeschaftteiles 2
abgeglichen ist. Auf der dem Gewindeschaftteil zugewandten Sei
te ist eine sich koaxial erstreckende Innenbohrung 19 vorge
sehen, deren Durchmesser so groß ist, daß der zylindrische Ab
schnitt 16 gerade hineinpaßt. Senkrecht zu der Richtung der In
nenbohrung 19 ist eine Querbohrung 20 vorgesehen, die in ihrer
Abmessung so ausgewählt ist, daß der Stift 18 mit Paßsitz ein
setzbar ist. Die Tiefe der Innenbohrung 19 und der Ort der
Bohrung 20 sind so gewählt, daß der zylindrische Abschnitt 16
in seinem mit der Sicherungsmutter fest montierten Zustand in
der in Fig. 2 gezeigten Weise in die Innenbohrung 19 einsetzbar
und mit dem Stift 18 festsetzbar ist. An dem der Bohrung 19 ab
gewandten Ende weist das Aufnahmeteil einen sich senkrecht zu
seiner Symmetrieachse erstreckenden Aufnahmeschlitz 21 auf, an
dessen beiden Außenseiten Versenkungen 22 und 23 vorgesehen
sind. Die Breite des Aufnahmeschlitzes 21 ist so gewählt, daß
die aufzunehmenden Gewindestangen lose durch diesen hindurch
führbar sind.
Zwischen der Sicherungsmutter 9 und dem Aufnahmeteil 3 ist noch
eine Dämpfungsscheibe 24 aus einem dämpfenden Material wie bei
spielsweise Silikon vorgesehen.
Nach einer Ausführungsform sind die Oberflächen der Ausnehmun
gen 8 und 12 und/oder des kugelsegmentförmigen Abschnittes 15
poliert oder mit einem Gleitmittel wie Teflon beschichtet, so
daß auch bei relativ festem Anschrauben der Sicherungsschraube
9 eine geringe gedämpfte Bewegung des zylindrischen Elementes
möglich ist. Nach einer anderen Ausführungsform sind die Ober
flächen rauh ausgebildet, so daß sich die Kugel im eingesetzten
Zustand mit festangezogener Sicherungsmutter 9 quasi festfrißt
und eine im wesentlichen starre Verbindung zwischen dem Verbin
dungselement 14 und dem Gewindeteil 4 entsteht.
Zum Einsetzen der Pedikelschrauben in die jeweiligen Wirbelkör
per sind die Sicherungsmuttern 9 gelöst. Nach dem Einsetzen
werden die Aufnahmeteile 3 in ihrer Richtung so ausgerichtet,
daß die Gewindestangen ohne Einwirkung von Scherkräften aus
richtbar sind. Die Gewindestangen werden dann mit jeweils in
den Versenkungen 22, 23 sitzenden Fixierschrauben fixiert. An
schließend wird die jeweilige Sicherungsmutter 9 je nach Wunsch
entweder so fest angezogen, daß sich das Verbindungselement 14
nahezu nicht mehr oder überhaupt nicht mehr bewegt und somit
eine im wesentlichen starre Verbindung zwischen Aufnahmeteil 3
und Gewindeschaftteil 2 entsteht, oder es wird nur so weit an
gezogen, daß noch eine gewünschte gedämpfte Bewegung zwischen
den beiden Teilen möglich ist.
Mit der oben beschriebenen Pedikelschraube wird somit eine um
die Symmetrieachse unbegrenzte freie Bewegung und in horizon
taler und vertikaler Richtung einer voreinstellbaren Bewegung,
die vorzugsweise bei einem Winkel von 10 bis 30° liegt,
erreicht.
Claims (10)
1. Pedikelschraube zur Stabilisierung von Wirbelsäulensegmenten
mit einem Gewindeschaftteil und einem kopfseitig vorgesehenen
Aufnahmeteil für eine Stange, dadurch gekennzeichnet, daß das
Gewindeschaftteil (2) und das Aufnahmeteil (3) gelenkig mitein
ander verbunden sind.
2. Pedikelschraube nach Anspruch 1, dadurch gekennzeichnet, daß
Gewindeschaftteil (2) und Aufnahmeteil (3) derart über ein Ge
lenk verbunden sind, daß eine Relativbewegung um eine erste
Achse möglich ist.
3. Pedikelschraube nach Anspruch 2, dadurch gekennzeichnet, daß
eine Relativbewegung um eine sich zur ersten Achse quer er
streckende zweite Achse möglich ist.
4. Pedikelschraube nach einem der Ansprüche 1 bis 3, dadurch
gekennzeichnet, daß das Gelenk arretierbar ist.
5. Pedikelschraube nach einem der Ansprüche 1 bis 4, dadurch
gekennzeichnet, daß das Gewindeschaftteil (2) und das Auf
nahmeteil (3) über ein Verbindungselement (14) miteinander ver
bunden sind.
6. Pedikelschraube nach Anspruch 5, dadurch gekennzeichnet, daß
das Verbindungselement (14) einen kugelförmigen oder kugelseg
mentförmigen Abschnitt (15) und das Gewindeschaftteil (2) eine
diesen Abschnitt aufnehmende Kugelpfanne (8) aufweisen.
7. Pedikelschraube nach Anspruch 6, dadurch gekennzeichnet, daß
das Verbindungselement (14) einen zylindrischen Abschnitt (16)
und das Aufnahmeteil (3) eine diesen aufnehmende hohlzylind
rische Ausnehmung (19) aufweisen.
8. Pedikelschraube nach Anspruch 7, dadurch gekennzeichnet, daß
der zylindrische Abschnitt (16) und das Aufnahmeteil (3) mit
einander drehfest verriegelbar sind.
9. Pedikelschraube nach einem der Ansprüche 1 bis 8, dadurch
gekennzeichnet, daß die Verbindung zwischen Gewindeschaftteil
(2) und Aufnahmeteil (3) so einstellbar ist, daß sie nahezu
starr ist.
10. Pedikelschraube nach Anspruch 9, dadurch gekennzeichnet,
daß eine den kugelförmigen Abschnitt (15) in der Kugelpfanne
(8) haltende Sicherungsschraube (9) vorgesehen ist.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3614101A DE3614101C1 (de) | 1986-04-25 | 1986-04-25 | Pedikelschraube |
ES198787105186T ES2035826T3 (es) | 1986-04-25 | 1987-04-08 | Tornillo de pediculo. |
EP87105186A EP0242708B1 (de) | 1986-04-25 | 1987-04-08 | Pedikelschraube |
AT87105186T ATE82484T1 (de) | 1986-04-25 | 1987-04-08 | Pedikelschraube. |
DE8787105186T DE3782678D1 (de) | 1986-04-25 | 1987-04-08 | Pedikelschraube. |
JP62101107A JPS62277954A (ja) | 1986-04-25 | 1987-04-23 | 茎ねじ |
KR1019870003978A KR950006929B1 (ko) | 1986-04-25 | 1987-04-24 | 페디클(pedicle)나사 |
CA000535489A CA1328591C (en) | 1986-04-25 | 1987-04-24 | Bone screw for stabilizing spinal segments |
US07/317,144 US4946458A (en) | 1986-04-25 | 1989-02-28 | Pedicle screw |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3614101A DE3614101C1 (de) | 1986-04-25 | 1986-04-25 | Pedikelschraube |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3614101C1 true DE3614101C1 (de) | 1987-10-22 |
Family
ID=6299563
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3614101A Expired DE3614101C1 (de) | 1986-04-25 | 1986-04-25 | Pedikelschraube |
DE8787105186T Expired - Lifetime DE3782678D1 (de) | 1986-04-25 | 1987-04-08 | Pedikelschraube. |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8787105186T Expired - Lifetime DE3782678D1 (de) | 1986-04-25 | 1987-04-08 | Pedikelschraube. |
Country Status (8)
Country | Link |
---|---|
US (1) | US4946458A (de) |
EP (1) | EP0242708B1 (de) |
JP (1) | JPS62277954A (de) |
KR (1) | KR950006929B1 (de) |
AT (1) | ATE82484T1 (de) |
CA (1) | CA1328591C (de) |
DE (2) | DE3614101C1 (de) |
ES (1) | ES2035826T3 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE8802112U1 (de) * | 1988-02-18 | 1989-07-13 | Howmedica Gmbh, 2314 Schoenkirchen, De | |
EP0346521A1 (de) * | 1988-06-13 | 1989-12-20 | Acromed Corporation | Einrichtung zur Stabilisierung der Wirbelsäule |
WO1991006252A1 (de) * | 1989-11-03 | 1991-05-16 | Lutz Biedermann | Knochenschraube |
Families Citing this family (485)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4887596A (en) * | 1988-03-02 | 1989-12-19 | Synthes (U.S.A.) | Open backed pedicle screw |
CH683963A5 (de) * | 1988-06-10 | 1994-06-30 | Synthes Ag | Fixateur intern. |
DE3823737A1 (de) * | 1988-07-13 | 1990-01-18 | Lutz Biedermann | Korrektur- und haltevorrichtung, insbesondere fuer die wirbelsaeule |
US5156606A (en) * | 1988-10-11 | 1992-10-20 | Zimmer, Inc. | Method and apparatus for removing pre-placed prosthetic joints and preparing for their replacement |
DE3841008A1 (de) * | 1988-12-06 | 1990-06-07 | Heinrich Ulrich | Implantat zur wirbelsaeulenkorrektur |
US5147359A (en) * | 1988-12-21 | 1992-09-15 | Zimmer, Inc. | Spinal hook body |
US5116334A (en) * | 1988-12-21 | 1992-05-26 | Zimmer, Inc. | Posterior spinal system and method |
US5074864A (en) * | 1988-12-21 | 1991-12-24 | Zimmer, Inc. | Clamp assembly for use in a spinal system |
GB2254394B (en) * | 1988-12-21 | 1993-03-17 | Bristol Myers Squibb Co | Coupler assembly |
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Also Published As
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JPH058011B2 (de) | 1993-02-01 |
KR870010327A (ko) | 1987-11-30 |
EP0242708B1 (de) | 1992-11-19 |
JPS62277954A (ja) | 1987-12-02 |
DE3782678D1 (de) | 1992-12-24 |
KR950006929B1 (ko) | 1995-06-26 |
ATE82484T1 (de) | 1992-12-15 |
ES2035826T3 (es) | 1993-05-01 |
EP0242708A2 (de) | 1987-10-28 |
CA1328591C (en) | 1994-04-19 |
US4946458A (en) | 1990-08-07 |
EP0242708A3 (en) | 1988-03-23 |
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