DE10357960B4 - Height-adjustable intervertebral implant - Google Patents
Height-adjustable intervertebral implant Download PDFInfo
- Publication number
- DE10357960B4 DE10357960B4 DE10357960.5A DE10357960A DE10357960B4 DE 10357960 B4 DE10357960 B4 DE 10357960B4 DE 10357960 A DE10357960 A DE 10357960A DE 10357960 B4 DE10357960 B4 DE 10357960B4
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- Prior art keywords
- intervertebral implant
- contact surfaces
- helical
- groove
- contact
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/442—Intervertebral or spinal discs, e.g. resilient
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
- A61F2/4465—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages having a circular or kidney shaped cross-section substantially perpendicular to the axis of the spine
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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- Engineering & Computer Science (AREA)
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- Neurology (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Prostheses (AREA)
Abstract
Zwischenwirbelimplantat (1) mit
einem ersten Teil (10) und einem zweiten Teil (20) mit aneinander angrenzenden Kontaktflächen (12, 22) und
einer Führungseinrichtung (15, 25), die ein Verschieben des ersten Teils (10) und des zweiten Teils (20) relativ zueinander durch Gleiten der Kontaktflächen (12, 22) aufeinander von einer ersten Stellung (A) aus, bei der das erste Ende (13) des ersten Teils (10) dem ersten Ende (23) des zweiten Teils gegenüberliegt, in Richtung auf eine zweite Stellung (B) hin, bei das erste Ende (13) des ersten Teils (10) dem zweiten Ende (24) des zweiten Teils und das zweite Ende (14) des ersten Teils (10) dem ersten Ende (23) des zweiten Teils gegenüberliegt, führt, dadurch gekennzeichnet, dass
ein Steigungswinkel (α) der Kontaktflächen (12, 22) abhängig von dem verwendeten Material und der Oberflächenbeschaffenheit der beiden Kontaktflächen so ausgebildet ist, dass eine Selbsthemmung zwischen dem ersten Teil (10) und dem zweiten Teil (20) wirksam ist, und
die Führungseinrichtung (15, 25) in Form einer Nut-Steg-Verbindung ausgebildet ist.Intervertebral implant (1) with
a first part (10) and a second part (20) with adjoining contact surfaces (12, 22) and
guide means (15, 25) for displacing the first part (10) and the second part (20) relative to each other by sliding the contact surfaces (12, 22) towards each other from a first position (A) at which the first end (13) of the first part (10) faces the first end (23) of the second part, towards a second position (B), at the first end (13) of the first part (10) faces the second end (24). of the second part and the second end (14) of the first part (10) is opposite the first end (23) of the second part, characterized in that
a pitch angle (α) of the contact surfaces (12, 22) is formed depending on the material used and the surface finish of the two contact surfaces so that a self-locking between the first part (10) and the second part (20) is effective, and
the guide device (15, 25) is designed in the form of a groove-web connection.
Description
Die vorliegende Erfindung bezieht sich auf ein höheneinstellbares Zwischenwirbelimplantat.The present invention relates to a height adjustable intervertebral implant.
Zwischenwirbelimplantate werden insbesondere nach der Entfernung einer Bandscheibe eingesetzt, um den Zwischenraum zwischen den Wirbelkörpern zu stabilisieren.Intervertebral implants are particularly used after the removal of an intervertebral disc to stabilize the space between the vertebral bodies.
Ein solches Zwischenwirbelimplantat ist in der
Es ist auch ein einstückig ausgebildetes bananenförmig gekrümmtes Zwischenwirbelimplantat bekannt. Dieses ist jedoch in seiner Höhe nicht verstellbar. Ein Zwischenwirbelimplantat entsprechend den Merkmalen im Oberbegriff des Anspruchs 1 ist aus der
Die Aufgabe der vorliegenden Erfindung besteht darin, ein höhenverstellbares Zwischenwirbelimplantat bereitzustellen, das besonders für einen minimalinvasiven Einsatz geeignet ist.The object of the present invention is to provide a height-adjustable intervertebral implant, which is particularly suitable for minimally invasive use.
Die Aufgabe wird gelöst durch ein Zwischenwirbelimplantat gemäß Anspruch 1. Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.The object is achieved by an intervertebral implant according to
Bei diesem Zwischenwirbelimplantat kann durch eine Verschiebung zwischen dem ersten Teil und dem zweiten Teil durch Gleiten der Kontaktflächen aufeinander die Einbauhöhe verändert werden.In this intervertebral implant can be changed by sliding the contact surfaces on each other, the installation height by a shift between the first part and the second part.
Dadurch, dass die Gleitbewegung zwischen dem ersten Teil und dem zweiten Teil vorzugsweise schrauben- bzw. wendelförmig verläuft, ist das Zwischenwirbelimplantat besonders für den minimalinvasiven Einsatz geeignet.Because the sliding movement between the first part and the second part is preferably helical or helical, the intervertebral implant is particularly suitable for minimally invasive use.
Durch den vorzugsweise vorgesehenen Endanschlag wird eine Gleitbewegung zwischen dem ersten Teil und dem zweiten Teil über eine Endposition hinaus verhindert.The preferably provided end stop prevents sliding movement between the first part and the second part beyond an end position.
Durch die vorzugsweise vorgesehene Selbsthemmung wird ein unbeabsichtigtes Verschieben zwischen dem ersten Teil und dem zweiten Teil verhindert.By the preferably provided self-locking unintentional movement between the first part and the second part is prevented.
Weitere Merkmale und Zweckmäßigkeiten der Erfindung ergeben sich aus der Beschreibung von Ausführungsbeispielen anhand der beigefügten Zeichnungen.Further features and advantages of the invention will become apparent from the description of embodiments with reference to the accompanying drawings.
Von den Figuren zeigen:From the figures show:
Im folgenden wird mit Bezug auf
Wie aus
Wie am besten aus
Wie am besten aus
Die erste und zweite Oberfläche (
Zum Einstellen der gewünschten Höhe des Zwischenwirbelimplantats
Wie am besten aus
Zum Einsetzen des Zwischenwirbelimplantates
Als Material für das Zwischenwirbelimplantat ist vorzugsweise Titan vorgesehen. Alternativ dazu können auch andere körperverträgliche Metalle oder Legierungen oder Kunststoffe wie z. B. PEEK oder PTFE verwendet werden.Titanium is preferably provided as material for the intervertebral implant. Alternatively, other biocompatible metals or alloys or plastics such. As PEEK or PTFE can be used.
Im Folgenden sind Abwandlungen des oben beschriebenen Zwischenwirbelimplantats beschrieben.Variations of the intervertebral implant described above are described below.
In der in
In einer weiteren abgewandelten Ausführungsform sind der Steg
In weiteren abgewandelten Ausführungsformen ist die Steg-Nut-Verbindung T-förmig, rechteckig, quadratisch oder in Form einer anderen formschlüssigen Verbindung ausgebildet.In further modified embodiments, the web-groove connection is T-shaped, rectangular, square or formed in the form of another positive connection.
In einer weiteren abgewandelten Ausführungsform ist die Steg-Nut-Verbindung nicht als Abschnitt einer Schrauben- bzw. Wendellinie ausgebildet, sondern gerade.In a further modified embodiment, the web-groove connection is not formed as a section of a helical line, but straight.
In einer weiteren abgewandelten Ausführungsform ist die äußere Form des ersten und/oder zweiten Teils nicht kreisbogenförmig ausgebildet. Es reicht, dass die die Steg-Nut-Verbindung als Abschnitt einer Schrauben- bzw. Wendellinie oder gerade ausgebildet ist.In a further modified embodiment, the outer shape of the first and / or second part is not formed in a circular arc. It is sufficient that the web-groove connection as a section of a helical or spiral line or straight is formed.
In einer weiteren abgewandelten Ausführungsform sind die Kontaktflächen des ersten und/oder zweiten Teils aufgeraut und/oder stufig gefräst.In a further modified embodiment, the contact surfaces of the first and / or second part are roughened and / or milled in stages.
In einer weiteren abgewandelten Ausführungsform sind die Oberflächen des ersten und/oder zweiten Teils ohne Rillen ausgebildet.In a further modified embodiment, the surfaces of the first and / or second part are formed without grooves.
Claims (10)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
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DE10357960.5A DE10357960B4 (en) | 2003-12-09 | 2003-12-09 | Height-adjustable intervertebral implant |
DE502004010737T DE502004010737D1 (en) | 2003-12-09 | 2004-10-14 | Height-adjustable intervertebral implant |
EP04024537A EP1541096B1 (en) | 2003-12-09 | 2004-10-14 | Height adjustable intervertebral implant |
KR1020040097337A KR101153469B1 (en) | 2003-12-09 | 2004-11-25 | Height-adjustable intervertebral implant |
JP2004353526A JP4499541B2 (en) | 2003-12-09 | 2004-12-07 | Intervertebral implant |
US11/009,224 US7618458B2 (en) | 2003-12-09 | 2004-12-09 | Height-adjustable intervertebrae implant |
US12/606,857 US20100049325A1 (en) | 2003-12-09 | 2009-10-27 | Height-adjustable intervertebrae implant |
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DE10357960.5A DE10357960B4 (en) | 2003-12-09 | 2003-12-09 | Height-adjustable intervertebral implant |
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DE10357960B4 true DE10357960B4 (en) | 2015-09-03 |
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DE10357960.5A Expired - Fee Related DE10357960B4 (en) | 2003-12-09 | 2003-12-09 | Height-adjustable intervertebral implant |
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