DE10130798A1 - Endoprosthesis of an intervertebral disk comprises a bent plate with a U- or V-shaped cross section and tabs for fixing screws - Google Patents

Endoprosthesis of an intervertebral disk comprises a bent plate with a U- or V-shaped cross section and tabs for fixing screws

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Publication number
DE10130798A1
DE10130798A1 DE2001130798 DE10130798A DE10130798A1 DE 10130798 A1 DE10130798 A1 DE 10130798A1 DE 2001130798 DE2001130798 DE 2001130798 DE 10130798 A DE10130798 A DE 10130798A DE 10130798 A1 DE10130798 A1 DE 10130798A1
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DE
Germany
Prior art keywords
endoprosthesis according
endoprosthesis
spring plate
tabs
bone
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Withdrawn
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DE2001130798
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German (de)
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Individual
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Individual
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Priority to DE2001130798 priority Critical patent/DE10130798A1/en
Publication of DE10130798A1 publication Critical patent/DE10130798A1/en
Withdrawn legal-status Critical Current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
    • A61F2/442—Intervertebral or spinal discs, e.g. resilient
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A61F2002/30131—Rounded shapes, e.g. with rounded corners horseshoe- or crescent- or C-shaped or U-shaped
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30159—Concave polygonal shapes
    • A61F2002/30176—V-shaped
    • 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
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • A61F2002/30571—Leaf springs
    • 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
    • A61F2002/30576—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs
    • A61F2002/30578—Special structural features of bone or joint prostheses not otherwise provided for with extending fixation tabs having apertures, e.g. for receiving fixation screws
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0013—Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/0054—V-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00179—Ceramics or ceramic-like structures
    • A61F2310/00293—Ceramics or ceramic-like structures containing a phosphorus-containing compound, e.g. apatite

Abstract

The endoprosthesis of an intervertebral disk comprises a bent plate with U- or V-shaped cross section and tabs for fixing screws.

Description

Technisches Problem der ErfindungTechnical problem of the invention

Unter dem Aspekt der steigenden Lebenserwartung der Bevölkerung nimmt insbesondere die Zahl von degenerativen Erkrankungen der Wirbelsäule zu. Im Vordergrund stehen hierbei Abnutzungserscheinungen der Bandscheiben mit erheblichen Therapiekosten. Neben der operativen Stabilisierung nach vorheriger Bandscheibenentfernung und Ersatz durch einen rigiden knöchernen und/oder Metall-Spacer (knöcherne Fusion) wurden in der zurückliegenden Zeit verschiedene Techniken zum Bandscheibenersatz vorgestellt. Der Nachteil der aktuell verfügbaren Bandscheibenprothesen bzw. Kunststoffkissen/Kunststoffspacer ergibt sich aus dem komplizierten Aufbau und der unzureichenden Fixierbarkeit im Bandscheibenzwischenraum nach Entfernung der krankhaft veränderten Bandscheibe. In der Grenzschicht zum Knochen kann es auf Grund der dynamischen Fixierung des Implantates mit permanenten Druck und Scherkräften zu keiner Osteo- Integration kommen, so dass häufig Dislokationen mit Funktionsverlust der Prothesen auftreten. Andererseits erfordert die Implantationstechnik einiger Zwischenwirbelscheibenprothesen die Eröffnung des subkortikalen Knochens, so dass es zu einer Freisetzung osteogener Faktoren und nachfolgend zur knöchernen Fusion des Bandscheibenfaches kommt. Konstruktiv bedingt sind die meisten Zwischenwirbelscheiben -Endoprothesen nur im frühen Stadium einer krankhaften Veränderungen an der Bandscheibe verwendbar, da mit Fortschreiten der Erkrankung die Begleitstrukturen (Wirbelgelenke, Bänder, Muskulatur) nachhaltig geschädigt werden. Taking into account the increasing life expectancy of the population in particular the number of degenerative diseases of the spine. In the foreground here signs of wear of the intervertebral discs with considerable therapy costs. Next surgical stabilization after previous intervertebral disc removal and replacement with a rigid bony and / or metal spacer (bony fusion) have been used in the Different techniques for intervertebral disc replacement were presented in the past. The Disadvantage of the currently available intervertebral disc prostheses or Plastic pillow / plastic spacer results from the complicated structure and the inadequate Fixability in the intervertebral disc space after removal of the pathologically changed Intervertebral disc. In the boundary layer to the bone, due to the dynamic Fixation of the implant with permanent pressure and shear forces to no osteo- Integration occur, so that often dislocations with loss of function of the prostheses occur. On the other hand, the implantation technique requires some Intervertebral disc prostheses open the subcortical bone, causing it to a release of osteogenic factors and subsequently to the bony fusion of the Intervertebral disc compartment is coming. Most intervertebral discs are of structural design - Endoprostheses only in the early stages of pathological changes to the Intervertebral disc can be used as the accompanying structures as the disease progresses (Vertebral joints, ligaments, muscles) are sustainably damaged.

Lösung des Problemsthe solution of the problem

Durch eine sichere Verankerung der ventral eingebrachten Endoprothese (Spacer) unter Verwendung von Pedikelschrauben, ergeben sich mehrere Vorteile. Pedikelschrauben als Lastträger, stellen ein etabliertes Verfahren in der "dorsalen" Wirbelsäulenchirurgie dar. Sie dienten bisher der hinteren Verankerung von dynamischen und fixierenden Vorrichtungen an der Wirbelsäule. Durch leichte Modifikation können diese als stabiler Träger für Bandscheibenimplantate fungieren. Die Probleme ventraler Implantate, die sich nach dem aktuellen Stand der Technik aus der Grenzzonenreaktion (Implantat/Knochen) ergeben lassen sich weitestgehend eliminieren, da die Krafteinleitung nicht ausschließlich über das Bandscheibenfach erfolgt. Resultierend aus dieser stabilen Befestigungsmöglichkeit kann das Design der Bandscheibenprothese dahingehend verändert werden, dass einfachere konstruktive Lösungen möglich werden. So ist neben Fixation von beliebigen Prothesendesigns, die sichere Befestigung der "Dynamischen Federplatte" möglich. Bei ausreichender Stabilität kann auf eine zusätzliche Fixation im Grund- und Deckplattenbereich mit Eröffnung des spongiösen Knochens erzichtet werden. Durch spezielle mechanische Eigenschaften ist die anteilige Wiederherstellung des Banscheibenzwischenraumes mit konsekutiver Entlastung des Facettengelenke möglich. Über die verwendeten Pedikelschrauben kann bei Bedarf eine zusätzliche dynamische Stabilisierung von hinten (Kunststoffkissen mit Zuggurtung) und bei Fortschreiten der krankhaften Veränderungen im Intervall eine stabile Fusion in herkömmlicher Weise ohne die Notwendigkeit eines Schraubenwechsels erfolgen. By securely anchoring the ventrally inserted endoprosthesis (spacer) under Using pedicle screws gives several advantages. Pedicle screws as Load carriers represent an established procedure in "dorsal" spine surgery. You have been used to anchor dynamic and fixing devices at the rear on the spine. By slight modification, they can be used as stable supports for Intervertebral disc implants act. The problems of ventral implants that arise after the state of the art from the border zone reaction (implant / bone) can be largely eliminated, since the force is not transmitted exclusively through the Intervertebral disc compartment. As a result of this stable mounting option the design of the intervertebral disc prosthesis can be changed so that simpler constructive solutions become possible. So besides fixation of any Prosthesis designs, the secure attachment of the "dynamic spring plate" possible. at sufficient stability can be due to an additional fixation in the base and Cover plate area with opening of the cancellous bone can be told. By special mechanical properties is the proportional recovery of the Space between the slices with consecutive relief of the facet joints possible. If necessary, an additional dynamic one can be used with the pedicle screws Stabilization from behind (plastic cushions with tension straps) and as the pathological changes in the interval without a stable fusion in a conventional manner the need to change screws.

Anwendungsgebietfield of use Medizinmedicine

  • - speziell Orthopädie/Traumatologie/Neurochirurgie/ - especially orthopedics / traumatology / neurosurgery /
  • - allgemein Wirbelsäulenchirurgie. - general spine surgery.
Abbildungenpictures

Fig. 1 gesamtansicht der Dynamischen Federplatte von schräg vorn. Fig. 1 overall view of the dynamic spring plate obliquely from the front.

Fig. 2 schematische Ansicht der implantierten Federplatte von seitlich. Die Fixierung erfolgt über Pedikelschrauben, die in Abhängigkeit von der Modifikation von ventral oder dorsal eingebracht werden können. Fig. 2 shows a schematic view of the implanted spring plate from the side. The fixation takes place via pedicle screws, which can be inserted from the ventral or dorsal depending on the modification.

Fig. 3 schematische Ansicht der implantierten Federplatte von vorn. Fig. 3 schematic view of the implanted spring plate from the front.

Claims (9)

1. Endoprothese der Zwischenwirbelscheibe, die als dynamische Federplatte (ventraler Spacer) durch transpedikulär eingebrachte Schrauben (Pedikelschrauben) fixiert wird, gekennzeichnet durch v- oder u-förmiges Plattendesign mit entsprechenden ventralen Befestigungslaschen kranial und kaudal. 1. Endoprosthesis of the intervertebral disc, which is fixed as a dynamic spring plate (ventral spacer) by transpedicular screws (pedicle screws), characterized by a V- or U-shaped plate design with corresponding ventral fastening tabs cranially and caudally. 2. Endoprothese nach Anspruch 1, dadurch gekennzeichnet, dass die Federplatte aus elastisch verformbarem Material, wie Metall, Kunststoff oder Keramik besteht. 2. Endoprosthesis according to claim 1, characterized in that the spring plate resiliently deformable material, such as metal, plastic or ceramic. 3. Endoprothese nach Anspruch 2, dadurch gekennzeichnet, dass eine Kombination von verschiedenen Materialien zur Erreichung spezieller mechanischer Eigenschaften möglich ist. 3. Endoprosthesis according to claim 2, characterized in that a combination of different materials to achieve special mechanical properties is possible. 4. Endoprothese nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass duch eine Modifikation verfügbarer Pedikelschraubensysteme eine sichere und/oder winkelstabile Verankerung erfolgt. 4. Endoprosthesis according to one of the preceding claims, characterized in that that by modification of available pedicle screw systems a safe and / or angular stable anchoring. 5. Endoprothese nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass durch Modifikation verfügbarer Pedikelschraubensysteme eine Kombination mit dynamischen (DYNESYS) oder statischen dorsalen Wirbelsäulensystemen möglich ist. 5. Endoprosthesis according to one of the preceding claims, characterized in that by modification of available pedicle screw systems a combination with dynamic (DYNESYS) or static dorsal spine systems possible is. 6. Endoprothese nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Federplatte in Abhängigkeit von der Belastung verschiedene Materialstärken und/oder Materialbreiten aufweist. 6. Endoprosthesis according to one of the preceding claims, characterized in that the spring plate depending on the load different material thicknesses and / or material widths. 7. Endoprothese nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eine der dem Knochen anliegenden Flächen eine mikroporöse (oberflächenvergrößernde) Oberfläche aufweist. 7. Endoprosthesis according to one of the preceding claims, characterized in that at least one of the surfaces adjacent to the bone is microporous Has (surface enlarging) surface. 8. Endoprothese nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass mindestens eine der dem Knochen anliegenden Oberflächen bioaktives Material (Hydroxylappatit, Polylactid und/oder HIP-Material) aufweist. 8. Endoprosthesis according to one of the preceding claims, characterized in that that at least one of the surfaces adjacent to the bone is bioactive material (Hydroxyappatite, polylactide and / or HIP material). 9. Endoprothese nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Befestigungslaschen und die Federplatte selbst, eine an den Wirbelkörper adaptierte Form aufweisen. 9. Endoprosthesis according to one of the preceding claims, characterized in that that the mounting tabs and the spring plate itself, one to the vertebral body have adapted shape.
DE2001130798 2001-06-22 2001-06-22 Endoprosthesis of an intervertebral disk comprises a bent plate with a U- or V-shaped cross section and tabs for fixing screws Withdrawn DE10130798A1 (en)

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DE2001130798 DE10130798A1 (en) 2001-06-22 2001-06-22 Endoprosthesis of an intervertebral disk comprises a bent plate with a U- or V-shaped cross section and tabs for fixing screws

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DE2001130798 DE10130798A1 (en) 2001-06-22 2001-06-22 Endoprosthesis of an intervertebral disk comprises a bent plate with a U- or V-shaped cross section and tabs for fixing screws

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005007040A1 (en) * 2003-07-22 2005-01-27 Synthes Gmbh Intervertebral implant comprising dome-shaped joint surfaces
US7637956B2 (en) 2003-07-22 2009-12-29 Synthes Usa, Llc Articulated endoprosthesis
FR2973221A1 (en) * 2011-04-04 2012-10-05 Groupe Lepine U-shaped intervertebral implant for implanting between cervical vertebrae, has lower lateral branch including transverse rib coming into contact with upper lateral branch to limit connection of free ends of branches
CN104546229A (en) * 2015-01-19 2015-04-29 南京航空航天大学 Artificial cervical intervertebral disc with ultrahigh activity type chamfering U-shaped structure
CN105997309A (en) * 2016-04-29 2016-10-12 西安交通大学第二附属医院 Bionic anti-dislocation goat lumbar vertebra junction complex

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005007040A1 (en) * 2003-07-22 2005-01-27 Synthes Gmbh Intervertebral implant comprising dome-shaped joint surfaces
US7637956B2 (en) 2003-07-22 2009-12-29 Synthes Usa, Llc Articulated endoprosthesis
US8133281B2 (en) 2003-07-22 2012-03-13 Synthes Usa, Llc Intervertebral implant comprising dome-shaped joint surfaces
FR2973221A1 (en) * 2011-04-04 2012-10-05 Groupe Lepine U-shaped intervertebral implant for implanting between cervical vertebrae, has lower lateral branch including transverse rib coming into contact with upper lateral branch to limit connection of free ends of branches
CN104546229A (en) * 2015-01-19 2015-04-29 南京航空航天大学 Artificial cervical intervertebral disc with ultrahigh activity type chamfering U-shaped structure
CN105997309A (en) * 2016-04-29 2016-10-12 西安交通大学第二附属医院 Bionic anti-dislocation goat lumbar vertebra junction complex

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