DE3637314A1 - Platzhalter-implantat - Google Patents

Platzhalter-implantat

Info

Publication number
DE3637314A1
DE3637314A1 DE19863637314 DE3637314A DE3637314A1 DE 3637314 A1 DE3637314 A1 DE 3637314A1 DE 19863637314 DE19863637314 DE 19863637314 DE 3637314 A DE3637314 A DE 3637314A DE 3637314 A1 DE3637314 A1 DE 3637314A1
Authority
DE
Germany
Prior art keywords
placeholder
sayings
vertebra according
vertebra
prongs
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.)
Granted
Application number
DE19863637314
Other languages
English (en)
Other versions
DE3637314C2 (de
Inventor
Lutz Biedermann
Juergen Prof Dr Med Harms
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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
Priority to DE19863637314 priority Critical patent/DE3637314A1/de
Application filed by Individual filed Critical Individual
Priority to AT87115838T priority patent/ATE59545T1/de
Priority to DE8787115838T priority patent/DE3766939D1/de
Priority to EP87115838A priority patent/EP0268115B1/de
Priority to ES87115838T priority patent/ES2019918B3/es
Priority to US07/115,178 priority patent/US4820305A/en
Priority to JP62278155A priority patent/JPS63177851A/ja
Priority to CA000550828A priority patent/CA1306082C/en
Priority to KR1019870012301A priority patent/KR950012178B1/ko
Publication of DE3637314A1 publication Critical patent/DE3637314A1/de
Application granted granted Critical
Publication of DE3637314C2 publication Critical patent/DE3637314C2/de
Priority to GR90400735T priority patent/GR3001272T3/el
Granted legal-status Critical Current

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
    • 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
    • A61F2/28—Bones
    • 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
    • A61F2/28—Bones
    • A61F2/2846—Support means for bone substitute or for bone graft implants, e.g. membranes or plates for covering bone defects
    • 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
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8085—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with pliable or malleable elements or having a mesh-like structure, e.g. small strips
    • 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
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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
    • A61F2/30721—Accessories
    • A61F2/30744—End caps, e.g. for closing an endoprosthetic cavity
    • A—HUMAN NECESSITIES
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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
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    • A61F2/3094—Designing or manufacturing processes
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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
    • A61F2/28—Bones
    • A61F2002/2835—Bone graft implants for filling a bony defect or an endoprosthesis cavity, e.g. by synthetic material or biological material
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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
    • 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
    • A61F2002/30113—Rounded shapes, e.g. with rounded corners circular
    • A—HUMAN NECESSITIES
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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
    • 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
    • A61F2002/30125—Rounded shapes, e.g. with rounded corners elliptical or oval
    • A—HUMAN NECESSITIES
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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
    • 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
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    • A61F2002/30133—Rounded shapes, e.g. with rounded corners kidney-shaped or bean-shaped
    • A—HUMAN NECESSITIES
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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
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    • 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
    • A61F2002/30138—Convex polygonal shapes
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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
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    • A61F2002/30108—Shapes
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
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    • A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
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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
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    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A—HUMAN NECESSITIES
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    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0041—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting 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
    • A61F2230/0006—Rounded shapes, e.g. with rounded corners circular
    • 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
    • A61F2230/0008—Rounded shapes, e.g. with rounded corners elliptical or oval
    • 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
    • A61F2230/0015—Kidney-shaped, e.g. bean-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
    • A61F2230/0017—Angular shapes
    • 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
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0069—Three-dimensional shapes cylindrical
    • 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
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Description

Die Erfindung betrifft einen Platzhalter insbesondere für einen Wirbel.
In einem Fall, in dem ein Wirbel aus der Wirbelsäule oder ein Knochenstück aus einem Knochen entfernt werden muß, ist es erforder­ lich, einen Platzhalter zwischen die verbleibenden Teile der Wirbel­ säule bzw. des Knochens einzusetzen.
Aufgabe der Erfindung ist es, einen Platzhalter zu schaffen, der so ausgebildet ist, daß er sehr einfach zwischen zwei Wirbel bzw. zwei Knochenteile einsetzbar ist.
Diese Aufgabe wird mit einem Platzhalter mit den kennzeichnenden Merkmalen des Patentanspruches 1 gelöst.
Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben.
Weitere Merkmale und Zweckmäßigkeiten der Erfindung ergeben sich aus der Beschreibung von Ausführungsbeispielen anhand der Figuren. Von den Figuren zeigen:
Fig. 1 eine perspektivische Ansicht einer Ausführungsform der Er­ findung;
Fig 2 eine Teilansicht der in Fig. 1 gezeigten Vorrichtung von oben;
Fig. 3 eine der Fig. 2 entsprechende Darstellung einer ab­ gewandelten Ausführungsform;
Fig. 4 eine der Fig. 1 entsprechende Darstellung einer ab­ gewandelten Ausführungsform; und
Fig. 5 eine der Fig. 2 entsprechende Darstellung der abge­ wandelten Ausführungsform.
Wie insbesondere aus Fig. 1 ersichtlich ist, ist der Platzhalter 1 aus einem zylindermantelförmigen Element gebildet. Der Zylindermantel weist in der aus Fig. 1 ersichtlichen Weise sich mit ihrer Längsdia­ gonale parallel zur Zylinderachse erstreckende rautenförmige Ausneh­ mungen 2 auf. Jeweils benachbarte Reihen 3, 4 solcher Rauten sind gegen­ einander um eine halbe Rautenhöhe versetzt. Dadurch wird ein Netz von sich unter einem spitzen Winkel schneidenden Bandstreifen 5, 6 ge­ bildet, die unter jeweils gleich großen Winkeln gegen die Längsdia­ gonale der Rauten geneigt sind. Dadurch wird erreicht, daß eine auf den Platzhalter in Richtung seiner Längsachse wirkende Belastung gleichmäßig aufgenommen wird.
Der obere Rand 7 und der untere Rand 8 ist jeweils so ausgebildet, daß annähernd "V"-förmige Zacken 9, 10 bzw. 11, 12 in der Mantelebene je­ weils parallel zur Zylinderachse nach unten bzw. oben hervorstehen. Die Enden 13 der Zacken sind so angephast bzw. angeschrägt, daß sich die beiden schrägen Flächen unter einem Winkel von annähernd 45° schneiden, so daß eine Art Schneidrand gebildet ist. In dem in Fig. 1 und 2 gezeigten Ausführungsbeispiel ist der Mantel durch Zusammen­ rollen eines entsprechend ausgebildeten Blechstreifens gebildet. Die beiden sich überlappenden Enden sind durch eine Schraube 14 mitein­ ander verbunden.
Grundsätzlich ist es möglich, gegebenenfalls die Wandung des Mantels zu verstärken, indem in der in Fig. 3 gezeigten Weise eine doppelte Wicklung verwendet wird.
Im Betrieb wird der Platzhalter in axialer Richtung anstelle eines herausgenommenen Wirbels oder Knochenstückes zwischen die verbleiben­ den Wirbel bzw. Knochenstücke eingesetzt. Dabei sind der Durchmesser und die axiale Länge des Mantels so gewählt, daß dieser so zwischen die verbleibenden Teile paßt, daß diese den ursprünglichen Abstand zu­ einander behalten. Der Platzhalter greift mit seinen Zacken 9, 10 bzw. 11, 12 in die Oberfläche der benachbarten Wirbel bzw. Knochen in der Weise ein, daß eine Torsionsbewegung des benachbarten einen Teiles gegenüber dem benachbarten anderen Teil durch die hervorstehenden Zacken auf das jeweils andere Teil übertragen bzw. gebremst wird.
Durch die Ausnehmungen hindurch wird zumindest das Innere des Ele­ mentes mit Knochenzement ausgefüllt. Gewünschtenfalls kann so viel Knochenzement eingeführt werden, daß dieser durch die Öffnungen nach außen tritt und daß eine Modellierung auf der Außenfläche vorge­ nommen wird. Vorzugsweise wird das Ausfüllen mit Knochenzement nach dem Einsetzen des oben beschriebenen Elementes vorgenommen. Es ist aber ein Ausfüllen des Innenraumes des Elementes vor dem Einsetzen möglich.
Bei den in den Fig. 4 und 5 gezeigten abgewandelten Ausführungs­ formen sind einander entsprechende Teile jeweils mit dem gleichen Bezugszeichen gekennzeichnet. Die Ausführungsform unterscheidet sich gegenüber der zuerst beschriebenen dadurch, daß an den beiden gegen­ überliegenden Enden des zylindrischen Körpers zylinderförmige Ringe 15, 16 vorgesehen sind, deren Außendurchmesser jeweils mit dem Innendurchmesser des zylindermantelförmigen Elementes übereinstimmt. Der Zylindermantel ist jeweils mittels Schrauben 17 mit dem daran anliegenden Ring 15, 16 fest verbunden. Der jeweilige Ring 15, 16 weist mit seiner außenliegenden Seite 18 einen Abstand d von dem benachbarten Rand 7 bzw. 8 auf. Dieser Abstand liegt vorzugsweise in der Größenordnung von 0,5 bis 2 mm. Beim Einsetzen des Elementes drückt sich dieses bei Belastung mit den über den jeweiligen Ring hervorstehenden Enden in den benachbarten Knochen hinein. Der an­ grenzende Ring verhindert ein weiteres Eindringen in den benachbar­ ten Knochen. Die gewünschte Größe des Abstandes d wird durch die beabsichtigte Art der Benutzung und die dabei gewünschte Eindring­ tiefe bestimmt.
Wie aus den Fig. 4 und 5 ersichtlich ist, ist die Abmessung der rautenförmigen Ausnehmungen so gewählt, daß eine Pedikelschraube mit ihrem Gewinde in die Ausnehmung einschraubbar ist, so daß eine zusätzliche einfache Fixierung zwischen dem Platzhalter und den je­ weils angrenzenden Wirbeln bzw. Knochenstücken erreichbar ist.
Wie oben ausgeführt, kann das Innere mit Knochenzement ausgefüllt werden. Es ist aber anstelle des Ausfüllens mit Knochenzement auch möglich, im Inneren des Platzhalters eigene oder Fremdknochenstücke einzusetzen, so daß der Platzhalter um das eingesetzte Knochenstück herum die Tragfunktion übernimmt. Sowohl beim Ausfüllen mit Knochen­ zement als auch beim Einsetzen des eigenen Knochenteiles wird ein besonders schneller Gefäßanschluß mit dem oben beschriebenen Platz­ halter erreicht. Außerdem wird ein sicherer Schutz des Rückenmark­ kanales gegen Verschleudern des Knochenzementes oder der Knochen­ stücke erreicht.

Claims (10)

1. Platzhalter (1), insbesondere für einen Wirbel, dadurch gekennzeichnet, daß ein zylinderförmiges Element mit wenigstens einer Ausnehmung (2) in der Wandung vorgesehen ist, des­ sen oberer und unterer Rand (7, 8) jeweils wenigstens teilweise zackenförmig ausgebildet ist.
2. Platzhalter, insbesondere für einen Wirbel nach Anspruch 1, dadurch gekennzeichnet, daß ein Teil der Zacken (9-12) zu einer ersten Umfangsrichtung hin und ein Teil zu der zweiten Umfangsrich­ tung hin geneigt sind.
3. Platzhalter, insbesondere für einen Wirbel nach einem der An­ sprüche 1 oder 2, dadurch gekennzeichnet, daß die Wandung aus einem Blech gebildet ist, welches eine Vielzahl von annähernd viereckigen Ausnehmungen aus­ weist, die so ausgerichtet sind, daß sich jeweils eine Diagonale im wesentlichen parallel zur Zylinderachse des Elementes erstreckt.
4. Platzhalter, insbesondere für einen Wirbel nach Anspruch 3, dadurch gekennzeichnet, daß die Ausnehmungen im wesentlichen rauten­ förmig sind und die Diagonale die Längsdiagonale ist.
5. Platzhalter, insbesondere für einen Wirbel nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die Zacken (9-12) jeweils divergierende Abschnitte des Bleches sind.
6. Platzhalter, insbesondere für einen Wirbel nach einem der An­ sprüche 1 bis 5, dadurch gekennzeichnet, daß die Zacken zum besseren Eingreifen in be­ nachbarte Knochenteile angephast sind.
7. Platzhalter, insbesondere für einen Wirbel nach einem der An­ sprüche 1 bis 6, dadurch gekennzeichnet, daß das Element aus einem biokompatiblen bzw. körperverträglichen Material, insbesondere Titan geformt ist.
8. Platzhalter, insbesondere für einen Wirbel nach einem der An­ sprüche 1 bis 7, dadurch gekennzeichnet, daß das Element aus einem doppeltgewickelten Mantel gebildet ist.
9. Platzhalter, insbesondere für einen Wirbel nach einem der An­ sprüche 1 bis 8, dadurch gekennzeichnet, daß das Innere des Mantels mit einem Knochen­ zement ausgefüllt ist.
10. Platzhalter nach einem der Ansprüche 1-9, dadurch gekennzeichnet, daß an wenigstens einem der Enden in einem Abstand (b) vom äußeren Rand (7, 8) ein Anschlag vorgesehen ist, der das Eindringen der Zacken in den benachbarten Knochen begrenzt.
DE19863637314 1986-11-03 1986-11-03 Platzhalter-implantat Granted DE3637314A1 (de)

Priority Applications (10)

Application Number Priority Date Filing Date Title
DE19863637314 DE3637314A1 (de) 1986-11-03 1986-11-03 Platzhalter-implantat
DE8787115838T DE3766939D1 (de) 1986-11-03 1987-10-28 Platzhalter, insbesondere fuer einen wirbel.
EP87115838A EP0268115B1 (de) 1986-11-03 1987-10-28 Platzhalter, insbesondere für einen Wirbel
ES87115838T ES2019918B3 (es) 1986-11-03 1987-10-28 Soporte de lugar, especialmente para un remolino
AT87115838T ATE59545T1 (de) 1986-11-03 1987-10-28 Platzhalter, insbesondere fuer einen wirbel.
US07/115,178 US4820305A (en) 1986-11-03 1987-10-30 Place holder, in particular for a vertebra body
JP62278155A JPS63177851A (ja) 1986-11-03 1987-11-02 脊椎用ホルダ
CA000550828A CA1306082C (en) 1986-11-03 1987-11-02 Place holder, in particular for a vertebra
KR1019870012301A KR950012178B1 (ko) 1986-11-03 1987-11-03 척추용 지지구
GR90400735T GR3001272T3 (en) 1986-11-03 1991-01-03 Space keeping device, especially for a vertebra

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19863637314 DE3637314A1 (de) 1986-11-03 1986-11-03 Platzhalter-implantat

Publications (2)

Publication Number Publication Date
DE3637314A1 true DE3637314A1 (de) 1988-05-11
DE3637314C2 DE3637314C2 (de) 1988-08-18

Family

ID=6313000

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19863637314 Granted DE3637314A1 (de) 1986-11-03 1986-11-03 Platzhalter-implantat
DE8787115838T Expired - Lifetime DE3766939D1 (de) 1986-11-03 1987-10-28 Platzhalter, insbesondere fuer einen wirbel.

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE8787115838T Expired - Lifetime DE3766939D1 (de) 1986-11-03 1987-10-28 Platzhalter, insbesondere fuer einen wirbel.

Country Status (9)

Country Link
US (1) US4820305A (de)
EP (1) EP0268115B1 (de)
JP (1) JPS63177851A (de)
KR (1) KR950012178B1 (de)
AT (1) ATE59545T1 (de)
CA (1) CA1306082C (de)
DE (2) DE3637314A1 (de)
ES (1) ES2019918B3 (de)
GR (1) GR3001272T3 (de)

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Cited By (10)

* Cited by examiner, † Cited by third party
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US4955908A (en) * 1987-07-09 1990-09-11 Sulzer Brothers Limited Metallic intervertebral prosthesis
WO1989001766A1 (en) * 1987-08-27 1989-03-09 Klaus Draenert Prestressed surgical mesh
DE19519101A1 (de) * 1995-05-24 1996-11-28 Harms Juergen Höhenverstellbarer Wirbelkörperersatz
DE19519101B4 (de) * 1995-05-24 2009-04-23 Harms, Jürgen, Prof. Dr. Höhenverstellbarer Wirbelkörperersatz
US6562072B1 (en) 1998-01-23 2003-05-13 Aesculap Ag & Co. Kg Implant for insertion between spinal column vertebrae
US6613090B2 (en) * 1998-01-23 2003-09-02 Aesculap Ag & Co. Kg Intervertebral implant
US7896918B2 (en) 2003-08-12 2011-03-01 Biedermann Motech Gmbh Space holder for vertebrae or intervertebral discs
US8551174B2 (en) 2003-08-12 2013-10-08 Biedermann Technologies Gmbh & Co. Kg Space holder for vertebrae or intervertebral discs
US9078762B2 (en) 2003-08-12 2015-07-14 Biedermann Technologies Gmbh & Co. Kg Space holder for vertebrae or intervertebral discs
US8771357B2 (en) 2004-05-04 2014-07-08 Biedermann Technologies Gmbh & Co. Kg Flexible space holder

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GR3001272T3 (en) 1992-08-25
ES2019918B3 (es) 1991-07-16
DE3637314C2 (de) 1988-08-18
CA1306082C (en) 1992-08-11
JPH0442940B2 (de) 1992-07-15
KR950012178B1 (ko) 1995-10-14
JPS63177851A (ja) 1988-07-22
ATE59545T1 (de) 1991-01-15
KR880005911A (ko) 1988-07-21
EP0268115B1 (de) 1991-01-02
US4820305A (en) 1989-04-11
EP0268115A1 (de) 1988-05-25
DE3766939D1 (de) 1991-02-07

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