CH640131A5 - Complete intervertebral prosthesis - Google Patents

Complete intervertebral prosthesis Download PDF

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Publication number
CH640131A5
CH640131A5 CH890679A CH890679A CH640131A5 CH 640131 A5 CH640131 A5 CH 640131A5 CH 890679 A CH890679 A CH 890679A CH 890679 A CH890679 A CH 890679A CH 640131 A5 CH640131 A5 CH 640131A5
Authority
CH
Switzerland
Prior art keywords
body
bearing body
bearing
recess
inserted
Prior art date
Application number
CH890679A
Other languages
German (de)
Inventor
Bernhard Georg Prof Dr M Weber
Original Assignee
Sulzer Ag
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 Sulzer Ag filed Critical Sulzer Ag
Priority to CH890679A priority Critical patent/CH640131A5/en
Publication of CH640131A5 publication Critical patent/CH640131A5/en

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442Intervertebral or spinal discs, e.g. resilient
    • A61F2/4425Intervertebral or spinal discs, e.g. resilient made of articulated components
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes, grooves
    • A61F2002/30841Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes, grooves
    • A61F2002/30878Special external and/or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes, grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442Intervertebral or spinal discs, e.g. resilient
    • A61F2/4425Intervertebral or spinal discs, e.g. resilient made of articulated components
    • A61F2002/443Intervertebral or spinal discs, e.g. resilient made of articulated components having two transversal endplates and at least one intermediate component

Description

640 131 640131

Claims (2)

PATENTANSPRÜCHE
1. Zwischenwirbel-Totalprothese, insbesondere für Halswirbel, bei der in den einander zugewandten benachbarten Endflächen zweier Wirbel je ein eine Gelenkpfanne tragender Lagerkörper mit mindestens im wesentlichen rechtek-kigem oder quadratischem Grundriss verankert ist, wobei zwischen die Lagerkörper ein Abstandskörper eingelegt ist, dadurch gekennzeichnet, dass jeder Lagerkörper (4) in einer seiner Längsseiten, vom Niveau des Randes seiner Gelenkpfanne (7) aus gesehen, eine Vertiefung (6) und an der dazu parallelen Längsseite einen vorspringenden Lappen (8) hat, wobei die Vertiefung (6) und der Lappen (8) so aufeinander abgestimmt sind, dass bei eingelegtem Abstandskörper (5) der Lappen (8) des einen Lagerkörpers (4) in die Vertiefung (6) des anderen Lagerkörpers (4) eingreift. 1. An intervertebral total prosthesis, particularly for cervical vertebrae, wherein in the facing adjacent end faces of two vertebrae an a socket supporting bearing body is ever anchored to at least substantially rechtek-kigem or square base, wherein a distance body is inserted between the bearing body, characterized seen that each bearing body (4) in one of its longitudinal sides, from the level of the edge of its joint socket (7), a recess (6) and a projecting lobes at the thereto parallel longitudinal side (8), said recess (6) and the tabs (8) are matched to one another that engages with an inserted spacer body (5) of the tabs (8) of a bearing body (4) in the recess (6) of the other bearing body (4).
2. Prothese nach Anspruch 1, dadurch gekennzeichnet, dass die Vertiefung (6) und der Lappen (8) mit schrägen, im wesentlichen parallel zueinander verlaufenden Begrenzungen (9) bzw. Flanken (10) versehen sind. 2. A prosthesis according to claim 1, characterized in that the recess (6) and the flap (8) with inclined, substantially parallel to each other boundaries (9) and flanks (10) are provided.
Die Erfindung betrifft eine Zwischenwirbel-Totalpro-these, insbesondere für Halswirbel, bei der in den einander zugewandten benachbarten Endflächen zweier Wirbel je ein eine Gelenkpfanne enthaltender Lagerkörper mit mindestens im wesentlichen rechteckigem oder quadratischem Grundriss verankert ist, wobei zwischen die Lagerkörper ein Abstandskörper eingelegt ist. The invention relates to an intervertebral-Totalpro thesis, particularly for cervical vertebrae, wherein in the facing adjacent end faces of two vertebrae each one a socket containing bearing body is anchored with at least a substantially rectangular or square plan, wherein a distance body is inserted between the bearing body.
Zwischenwirbel-Prothesen der genannten Art sind bekannt (DE-OS 2 804 936). The intervertebral prosthesis of the mentioned type are known (DE-OS 2804936). Bei der bisherigen Konstruktion dieser Prothesen, die in erster Linie als Halswirbel-Prothesen verwendet werden, besteht die Gefahr, dass infolge der relativ grossen Beweglichkeit der Halswirbel der Abstandskörper, der bevorzugt in bekannter Weise im wesentlichen konvex linsenförmig ausgebildet ist, aus den Lagerpfannen herausgedrückt wird; In the previous design of these prostheses which are primarily used as a cervical prosthesis, there is a risk that due to the relatively large mobility of the cervical vertebrae to the spacer body, which is preferably formed in a known manner substantially convex lens-shaped, is pressed out of the bearing sockets ; in erster Linie bei Bewegungen, die mit «Nicken des Kopfes» bezeichnet werden, kann der Abstandskörper relativ leicht nach hinten aus den bisherigen Lagerschalen herausgleiten. primarily with movements that are labeled "nod", the distance body can relatively easily slide out backwards from the previous cups. Aufgabe der Erfindung ist es daher, eine Zwischenwirbel-Totalprothese zu schaffen, bei der eine erhöhte Sicherheit gegen ein Herausgleiten des Abstandskörpers aus den pfannenartigen Ausnehmungen der Lagerkörper besteht. The object of the invention is therefore to provide an intervertebral Total prosthesis in which there is an increased safety against sliding of the spacer body from the socket-like recesses of the bearing body.
Gemäss der vorliegenden Erfindung wird diese Aufgabe dadurch gelöst, dass jeder Lagerkörper in einer seiner Längsseiten, vom Niveau des Randes seiner Gelenkpfanne aus gesehen, eine Vertiefung und an der dazu parallelen Längsseite einen vorspringenden Lappen hat, wobei die Vertiefung und der Lappen so aufeinander abgestimmt sind, dass bei eingelegtem Abstandskörper der Lappen des einen Lagerkörpers in die Vertiefung des anderen Lagerkörpers eingreift. According to the present invention, this object is achieved in that each bearing body in one of its longitudinal sides, viewed from the level of the edge of its joint socket of a recess and the thereto parallel longitudinal side has a projecting lobe, wherein the recess and the flap are adapted to one another that, when inserted spacer body the lobes of the bearing body engages a recess in the other of the bearing body.
Bei der neuen Konstruktion greifen die beiden Lagerkörper mit ihren dorsal und ventral gelegenen Seiten ineinander. With the new construction, the two bearing bodies intertwine with their dorsal and ventral sides.
Dadurch ist ihre Gleitbewegung auf dem Abstandskörper weitgehend geführt, so dass Verschiebungen der Prothesenteile relativ zueinander nach vorne und nach hinten erschwert werden. Characterized their sliding movement is guided substantially on the spacer body so that displacements of the prosthesis parts relative to each other be more difficult forward and backward. Darüber hinaus ist der Abstandskörper durch den Lappen des einen Lagerkörpers, der auch bei Nickbewegungen den anderen Lagerkörper in dessen Vertiefung überlappt, «gefangen», wodurch ein Herausgleiten aus den Lagerpfannen vermieden wird. In addition, the spacer body is "caught" by the lobes of a bearing body that overlaps even when pitching the other bearing body in the groove, thereby sliding out is prevented from bearing pans.
Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels im Zusammenhang mit der Zeichnung näher erläutert. In the following the invention with reference to an embodiment in conjunction with the drawing will be further explained.
Fig. 1 zeigt als Ausführungsbeispiel eine Halswirbelprothese, die schematisch zwischen zwei Halswirbel eingesetzt ist, in einer Ansicht von hinten und teilweise im Schnitt; Fig. 1 shows an exemplary embodiment of a cervical prosthesis, which is shown schematically inserted between two cervical vertebrae, in a view from the rear and partially in section;
Fig. 2 ist der Schritt II-II von Fig. 1. Fig. 2 is the step II-II of FIG. 1,.
In eine - beispielsweise mit einem Fräser hergestellte Ausnehmung eines Wirbelkörpers 1, an dem auf beiden Seiten der Fig. I noch Ansätze 3 der Wirbelfortsätze angedeutet sind, ist ein Lagerkörper 4 eingesetzt, der beispielsweise einen rechteckigen oder quadratischen Grundriss hat. In a -. Prepared, for example, with a cutter recess of a vertebral body 1, on which on both sides of the Fig I still lugs 3 of the spinous processes are indicated, a bearing body 4 is inserted, for example, having a rectangular or square plan.
In die äussere, dh dem benachbarten Wirbel 1 zugewandte Oberfläche des Lagerkörpers 4 ist eine Gelenkpfanne 7 eingelassen, die in Form und Grösse an einen Abstandskörper 5 angepasst ist, der zwischen die Lagerkörper 4 zweier benachbarter Wirbelkörper 1 als Prothesenkörper eingelegt wird. In the outer, ie the adjacent vertebral 1 facing surface of the bearing body 4 a joint socket 7 is inserted, which is adapted in shape and size to a spacer body 5, which is inserted between the bearing body 4 of two adjacent vertebral bodies 1 as the prosthesis body. Der Abstandskörper 5 ist im vorliegenden Beispiel linsenförmig ausgebildet, kann aber auch eine Kugel, ein kugelähnlicher oder ein elliptischer Körper sein. The spacer body 5 is formed lens-shaped in the present example, but may also be a ball, a ball-like or an elliptical body to be.
Jeder Lagerkörper 4 trägt auf seiner, den Wirbeln zugewandten Grundfläche je zwei Verankerungszapfen 2, mit denen er in operativ vorbereitete Bohrungen der Wirbel 1 ein-gepresst oder eingeschlagen wird. Each bearing member 4 carries on its facing the vertebrae base two anchoring pins 2 with which it is in operative prepared bores of the fluidized-1, a pressed or stamped.
Betrachtet man die den Rand der Gelenkpfanne 7 enthaltende Ebene als Bezugsebene, so hat jeder Lagerkörper 4 entweder in seiner dorsalen oder ventralen Seite erfindungs-gemäss eine Vertiefung 6, in die als Gegenstück ein vorspringender Lappen 8 des anderen Lagerkörpers 4 eingreift. Looking at the edge of the socket 7 containing plane as a reference plane, each bearing body 4 has either in its dorsal or ventral side Inventive according to a recess 6, engage the as counterpart a projecting tabs 8 of the other bearing body. 4 Bei Aufwärts- und Abwärtsbewegungen des Kopfes verschieben sich die jeweils zusammenwirkende Vertiefung 6 und der Lappen 8 relativ zueinander; In the upward and downward movements of the head, the respective cooperating recess 6 and the flap 8 move relative to each other; dabei taucht der Lappen 8 entweder tiefer in die Vertiefung 6 ein oder gleitet teilweise aus ihr heraus, ohne dass jedoch - besonders bei der Abwärtsbewegung- ein so grosser Spalt zwischen beiden entsteht, dass der Abstandskörper 5 nach hinten aus den Gelenkpfannen 7 herausgleiten kann. Here, the flap 8 immersed either deeper into the recess 6 or slide partially out of it, without, however - particularly in the Abwärtsbewegung- so large a gap between the two is formed such that the distance the body 5 can slide out backwards from the joint sockets. 7
Um auch bei seitlichen Kippbewegungen des Kopfes die Lagerkörper 4 in ihrer Bewegung zu führen, sind die Vertiefungen 6 zusätzlich mit schräg verlaufender Begrenzung 9 muldenförmig ausgebildet, der im wesentlichen parallel dazu verlaufende schräge Flanken 10 des Lappens 8 zugeordnet sind. To also result in lateral tilting movements of the head, the bearing body 4 in its movement, the depressions 6 are also trough-shaped with obliquely extending boundary 9, which extends substantially parallel to oblique edges of the flap 10 are associated. 8
Die Lagerkörper 4 und der Abstandskörper 5 sind aus in der Implantat-Technik bewährten Werkstoffen hergestellt, insbesondere haben sich hochmolekulares Polyäthylen (HDPE) für die Lagerkörper 4 und Biokeramik, vor allem hochreines und dichtes A1203, für die Abstandskörper 5 bewährt. The bearing body 4 and the spacer body 5 are prepared from the implant technique proven materials, in particular, high molecular weight polyethylene has (HDPE) for the bearing body 4 and bioceramics, especially a highly pure and dense A1203 proven for the spacer body. 5
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IBlatt Zeichnungen IBlatt drawings
CH890679A 1979-10-03 1979-10-03 Complete intervertebral prosthesis CH640131A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH890679A CH640131A5 (en) 1979-10-03 1979-10-03 Complete intervertebral prosthesis

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH890679A CH640131A5 (en) 1979-10-03 1979-10-03 Complete intervertebral prosthesis
DE19803023353 DE3023353C2 (en) 1979-10-03 1980-06-21

Publications (1)

Publication Number Publication Date
CH640131A5 true CH640131A5 (en) 1983-12-30

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DE (1) DE3023353C2 (en)

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* Cited by examiner, † Cited by third party
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* Cited by examiner, † Cited by third party
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DE3529761A1 (en) * 1984-09-04 1986-07-03 Univ Berlin Humboldt intervertebral disc prosthesis

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DE3023353A1 (en) 1981-04-09
DE3023353C2 (en) 1982-04-22

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