DE19723620A1 - Easily fitted, secure, artificial hip joint socket requiring no screws - Google Patents

Easily fitted, secure, artificial hip joint socket requiring no screws

Info

Publication number
DE19723620A1
DE19723620A1 DE19723620A DE19723620A DE19723620A1 DE 19723620 A1 DE19723620 A1 DE 19723620A1 DE 19723620 A DE19723620 A DE 19723620A DE 19723620 A DE19723620 A DE 19723620A DE 19723620 A1 DE19723620 A1 DE 19723620A1
Authority
DE
Germany
Prior art keywords
acetabular cup
rib
cup according
artificial acetabular
shell segments
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.)
Withdrawn
Application number
DE19723620A
Other languages
German (de)
Inventor
Laghaollah Dr Med Elhami
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
Application filed by Individual filed Critical Individual
Priority to DE19723620A priority Critical patent/DE19723620A1/en
Publication of DE19723620A1 publication Critical patent/DE19723620A1/en
Withdrawn legal-status Critical Current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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • 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
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2/4603—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4609—Special tools for implanting artificial joints for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
    • 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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    • A61F2/00—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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    • A61F2002/30172—T-shaped
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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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    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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    • 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
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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
    • A61F2002/30316—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
    • A61F2002/30594—Special structural features of bone or joint prostheses not otherwise provided for slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30784—Plurality of holes
    • A61F2002/30787—Plurality of holes inclined obliquely with respect to each other
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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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    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
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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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    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
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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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    • A61F2/00—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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    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)

Abstract

The artificial hip joint socket (10) is formed by flexibly-connected, relatively-stiff cup segments (11, 12, 13) forming the inner surface (14) and part of the outer surface (15) of the socket. It has fins (17) projecting from the outer surfaces. The fins are arranged near the open edges (18) of the cup segments, and project perpendicularly away from the local cup surface. Preferably the fins and outer surfaces of the cups are metal, especially titanium. The inner surfaces are polyethylene.

Description

Die Erfindung betrifft eine künstliche Hüftgelenkpfanne mit mindestens zwei sowohl einen Teil der Innenfläche als auch einen Teil der Außenfläche der Pfanne bildenden, relativ steifen Schalensegmenten, die untereinander nachgiebig verbunden sind.The invention relates to an artificial acetabular cup with at least two both forming part of the inner surface as well as part of the outer surface of the pan, relatively rigid shell segments that are flexibly connected to one another.

Eine solche künstliche Hüftgelenkpfanne ist aus DE 195 32 898 A1 bekannt. Bei der bekannten Pfanne weisen die Schalensegmente Senklöcher zur Aufnahme von Befesti­ gungsschrauben auf. Entsprechend einer abgewandelten Ausführungsform der bekann­ ten Pfanne sind die Schalensegmente mit federnden Einlagen ausgestattet, die mit über den Rand der Pfanne radial nach außen vorspringenden Nasen versehen sind, wobei die Nasen eine Durchgangsöffnung zum Durchstecken einer Befestigungsschraube aufwei­ sen.Such an artificial acetabular cup is known from DE 195 32 898 A1. In the known pan have the shell segments countersunk holes for receiving fasteners screws. According to a modified embodiment of the pan, the shell segments are equipped with resilient inserts, which with over the edge of the pan radially projecting lugs are provided, the Noses have a through opening for inserting a fastening screw sen.

Der Erfindung liegt die Aufgabe zugrunde, eine künstliche Hüftgelenkpfanne der ein­ gangs genannten Art zu schaffen, bei welcher die Befestigung der Pfanne am Implanta­ tionsort erleichtert und/oder verbessert ist.The invention has for its object an artificial acetabular cup to create the type mentioned, in which the attachment of the pan to the implant location is facilitated and / or improved.

Ausgehend von einer künstlichen Hüftgelenkpfanne der eingangs genannten Art wird diese Aufgabe erfindungsgemäß dadurch gelöst, daß von der Außenseite mindestens ei­ nes der Schalensegmente mindestens eine Rippe nach außen vorsteht, wobei die Rippe nahe dem freien Rand des zugehörigen Schalensegments angeordnet ist und von dem zugehörigen Schalensegment in einer Ebene absteht, die sich mindestens näherungs­ weise senkrecht zu derjenigen Ebene erstreckt, in welcher der freie Schalensegmentrand liegt.Starting from an artificial acetabular cup of the type mentioned at the beginning This object is achieved in that at least one egg from the outside Nes of the shell segments protrudes at least one rib outwards, the rib is arranged near the free edge of the associated shell segment and from which associated shell segment protrudes in a plane that is at least approximate extends perpendicular to the plane in which the free shell segment edge lies.

Die erfindungsgemäße Ausbildung erlaubt es, die künstliche Hüftgelenkpfanne in das natürliche Acetabulum einfach einzupressen oder einzuschlagen, wobei sich die Rippe in das Acetabulum eingräbt. Ein dabei im Acetabulum über der eingegrabenen Rippe verbleibender Spalt wächst in kürzester Zeit zu. In der Regel kann auf zusätzliche Befe­ stigungsschrauben ganz verzichtet werden. Gleichwohl ist die künstliche Hüftgelenk­ pfanne gegen Drehen und Kippen gesichert.The inventive design allows the artificial acetabular cup in the natural acetabulum easy to squeeze or hammer in, taking the rib digs into the acetabulum. One in the acetabulum over the buried rib remaining gap increases in a very short time. As a rule, additional attachments can be made screws are completely dispensed with. Nevertheless, the artificial hip joint pan secured against turning and tipping.

In weiterer Ausgestaltung der Erfindung kann die Rippe mindestens einen abgewinkel­ ten Flansch aufweisen. Ein solcher Flansch sorgt für eine weiter verbesserte Veranke­ rung der künstlichen Hüftgelenkpfanne im Acetabulum. Der Flansch kann insbesondere an dem von der Außenfläche des zugehörigen Schalensegments abliegenden Ende der Rippe angeordnet sein, und die Rippe kann dabei bevorzugt L-Form oder T-Form ha­ ben. In a further embodiment of the invention, the rib can be angled at least one th flange. Such a flange ensures a further improved anchoring artificial acetabular cup in the acetabulum. The flange can in particular at the end of the outer shell of the associated shell segment Rib can be arranged, and the rib can preferably L-shape or T-shape ha ben.  

Als zusätzliche Verankerungshilfe kann die Rippe mit mindestens einer Ausstanzung zur Bildung mindestens einer Federzunge versehen und/oder mit mindestens einer durchgehenden Öffnung zum Einwachsen von Knochengewebe versehen sein.As an additional anchoring aid, the rib can be punched out with at least one to form at least one spring tongue and / or with at least one through opening for waxing bone tissue.

Zweckmäßig steht die Rippe von der Außenfläche des zugehörigen Schalensegments mindestens näherungsweise radial ab und ist die Rippe in Abstand von dem freien Rand des zugehörigen Schalensegments angeordnet.The rib expediently stands from the outer surface of the associated shell segment at least approximately radially and the rib is at a distance from the free edge the associated shell segment arranged.

Die Rippe ist vorzugsweise aus Metall, insbesondere Titan, gefertigt, und auch die Außenfläche der Schalensegmente besteht vorzugsweise aus Metall, insbesondere Titan, während die Innenfläche der Schalensegmente bevorzugt aus Kunststoff, insbesondere Polyethylen, besteht.The rib is preferably made of metal, in particular titanium, and also the The outer surface of the shell segments preferably consists of metal, in particular titanium, while the inner surface of the shell segments preferably made of plastic, in particular Polyethylene.

Die Schalensegmente sind vorzugsweise an ihrem freien Rand mit einem nach außen abstehenden Flanschteil versehen, so daß die künstliche Hüftgelenkpfanne insgesamt eine hutförmige Konfiguration erhält. Die Flanschteile der Schalensegmente bilden ei­ nen Anschlag beim Eintreiben der künstlichen Hüftgelenkpfanne in das Acetabulum und verhindern insbesondere, daß die künstliche Hüftgelenkpfanne tiefer als vorgesehen in das Acetabulum eintaucht.The shell segments are preferably at their free edge with an outward projecting flange part so that the total acetabular cup as a whole receives a hat-shaped configuration. The flange parts of the shell segments form egg NEN stop when driving the artificial acetabular cup into the acetabulum and in particular prevent the acetabular cup from going deeper than intended immersed in the acetabulum.

Die Schalensegmente sind ferner vorteilhaft an ihrem freien Rand derart abgeschrägt, daß ihr innenliegendes Ende in einer Ebene liegt, die von dem Pol der Pfanne einen größeren Abstand hat als die Ebene, in welcher das außenliegende Ende der Schalen­ segmente liegt. Auf diese Weise läßt sich sicherstellen, daß der Kopf einer zugehörigen Hüftgelenkprothese über einen besonders großen Winkelbereich hinweg von der künst­ lichen Hüftgelenkpfanne umschlossen wird.The shell segments are also advantageously bevelled on their free edge, that its inner end lies in a plane that is one from the pole of the pan has a greater distance than the plane in which the outer end of the shells segments. In this way it can be ensured that the head of an associated one Hip prosthesis over a particularly large angular range from the artificial Lichen acetabular cup is enclosed.

Bevorzugte Ausführungsbeispiele der Erfindung sind nachstehend unter Bezugnahme auf die Zeichnungen näher erläutert. Es zeigen:Preferred embodiments of the invention are below with reference explained in more detail on the drawings. Show it:

Fig. 1 eine perspektivische Ansicht einer erfindungsgemäßen künstlichen Hüftgelenkpfanne, Fig. 1 is a perspective view of an artificial hip joint socket according to the invention,

Fig. 2 eine Ansicht der Hüftgelenkpfanne gemäß Fig. 1 in Richtung des Pfeils II in Fig. 1, Fig. 2 is a view of the acetabular cup of Fig. 1 in the direction of arrow II in Fig. 1,

Fig. 3 bis 6 in größerem Maßstab unterschiedlich ausgebildete Rippen, und Fig. 3 to 6 on a larger scale differently trained ribs, and

Fig. 7 eine perspektivische Ansicht der Hüftgelenkpfanne nach den Fig. 1 und 2 zusammen mit einem Einsetzwerkzeug. Fig. 7 is a perspective view of the acetabular cup of FIGS. 1 and 2 together with an insertion tool.

Die in den Fig. 1 und 2 dargestellte künstliche Hüftgelenkpfanne 10 weist drei relativ steife Schalensegmente 11, 12 und 13 auf, die gemeinsam sowohl die Innenfläche 14 als auch die Außenfläche 15 der künstliche Hüftgelenkpfanne bilden. Die Innenfläche 14 und die Außenfläche 15 sind mindestens näherungsweise halbkugelig oder kugelseg­ mentartig geformt. Die Schalensegmente 11, 12 und 13 sind über jeweils eine Brücke 16 untereinander federnd nachgiebig verbunden. Die Schalensegmente können im Bereich ihrer Innenfläche 14 insbesondere aus autoclavierbarem, körperverträglichem Kunst­ stoff, beispielsweise hochdichtem Polyethylen bestehen, während ihre Außenfläche 15 von biokompatiblem Metall, insbesondere Titan, gebildet ist.The illustrated in FIGS. 1 and 2 artificial hip joint socket 10 has three relatively rigid shell segments 11, 12 and 13, which jointly form both the inner surface 14 and the outer surface 15 of the acetabular cup. The inner surface 14 and the outer surface 15 are at least approximately hemispherical or spherical segment shaped. The shell segments 11 , 12 and 13 are resiliently connected to each other via a bridge 16 . The shell segments can be made in the area of their inner surface 14 in particular from autoclavable, body-compatible plastic, for example high-density polyethylene, while their outer surface 15 is formed from biocompatible metal, in particular titanium.

Die Hüftgelenkpfanne 10 kann im übrigen - mit Ausnahme der weiter unten näher er­ läuterten Rippen - in der aus DE 195 32 898 AI bekannten Weise aufgebaut sein. Dieser Aufbau bedarf daher vorliegend keiner weiteren Diskussion.The acetabular cup 10 can - apart from the ribs he explained below - be constructed in the manner known from DE 195 32 898 AI. This structure therefore does not require any further discussion here.

Von der Außenfläche 15 der Schalensegmente 11, 12 und 13 stehen Rippen 17 nach außen vor. Die Rippen 17 sind nahe, aber in Abstand von dem freien Rand 18 der Schalensegmente 11, 12 bzw. 13 angeordnet, und sie stehen von dem zugehörigen Schalensegment in einer Ebene ab, die sich mindestens näherungsweise senkrecht zu der Ebene erstreckt, in welcher der freie Schalensegmentrand 18 liegt. Die Fig. 3 bis 6 zeigen verschiedene Ausführungsformen der Rippen 17.Ribs 17 protrude outward from the outer surface 15 of the shell segments 11 , 12 and 13 . The ribs 17 are close but spaced from the free edge 18 of the shell segments 11 , 12 and 13 , respectively, and project from the associated shell segment in a plane that extends at least approximately perpendicular to the plane in which the free one Shell segment edge 18 lies. FIGS. 3 to 6 show various embodiments of the ribs 17.

Bei der Anordnung nach Fig. 3 weist die Rippe 17a an ihrem von der Außenfläche 15 des zugehörigen Schalenelements abliegenden Ende 19 einen einseitig abgewinkelten Flansch 20 auf, wobei die Rippe 17a insgesamt L-Form hat.In the arrangement according to FIG. 3, the rib 17 a has at its end 19 lying away from the outer surface 15 of the associated shell element a flange 20 which is angled on one side, the rib 17 a having an overall L-shape.

Bei der abgewandelten Ausführungsform gemäß Fig. 4 ist die Rippe 17b mit einer Aus­ stanzung 21 zur Bildung einer Federzunge 22 versehen, die aus der Hauptebene der Rippe 17b herausgebogen werden kann.In the modified embodiment according to FIG. 4, the rib 17 b is provided with a stamping 21 to form a spring tongue 22 which can be bent out of the main plane of the rib 17 b.

Fig. 5 zeigt eine Rippe 17c mit einer durchgehenden Öffnung 23, in die Knochenge­ webe einwachsen kann. Fig. 5 shows a rib 17 c with a continuous opening 23 , in which bone weave can grow.

Die Ausführungsform gemäß Fig. 6 ist ähnlich derjenigen von Fig. 3, mit der Aus­ nahme, daß die Rippe 17d an dem von der Außenfläche des zugehörigen Schalenseg­ ments abliegenden Ende einen beidseits abgewinkelten Flansch 24 aufweist, so daß die Rippe 17d T-Form hat.The embodiment of FIG. 6 is similar to that of Fig. 3, taking with the off that the rib 17 d on which comprises from the outer surface of the associated Schalenseg ments distal end a on both sides of angled flange 24, so that the rib 17 d T- Shape.

Die Schalensegmente 11, 12 und 13 weisen an ihrem freien Rand 18 jeweils ein nach außen abstehendes Flanschteil 26 auf, das in der Randebene liegt, so daß die künstliche Hüftgelenkpfanne 10 insgesamt eine Hutform hat. Die Schalensegmente 11, 12 und 13 sind ferner an ihrem freien Rand derart abgeschrägt, daß ihr innenliegendes Ende 28 in einer Ebene liegt, die von dem Pol 29 der Pfanne 10 einen größeren Abstand hat als die Ebene, in welcher das außenliegende Ende 30 des Randes der Schalensegmente liegt.The shell segments 11 , 12 and 13 each have on their free edge 18 an outwardly projecting flange part 26 which lies in the edge plane, so that the artificial acetabular cup 10 has an overall hat shape. The shell segments 11 , 12 and 13 are also bevelled on their free edge such that their inner end 28 lies in a plane which is at a greater distance from the pole 29 of the pan 10 than the plane in which the outer end 30 of the edge the shell segments lies.

Fig. 7 zeigt die künstliche Hüftgelenkpfanne 10 zusammen mit einem Einsetzwerkzeug 32. Das Einsetzwerkzeug 32 weist einen in die Pfanne 10 eintauchenden Kopfteil 33 auf, der so bemessen ist, daß er sich gegen die Innenfläche 14 der Pfanne 10 anlegt, wenn die Pfanne ihrem von den Flanschteilen 26 gebildeten abstehenden Rand auf ei­ nem komplementären Vorsprung 34 des Einsetzwerkzeugs 32 aufsitzt. Die Hüftgelenk­ pfanne 10 läßt sich auf dem Einsetzwerkzeug 32 mittels einer oder mehrerer Spannklammer(n) 35 fixieren. Die so fixierte Hüftgelenkpfanne wird beim Implantieren mittels des Einsetzwerkzeugs 32 in das Acetabulum eingeschlagen. Dabei graben sich die Rippen 17 in das Knochengewebe ein. Nach Lösen der Spannklammer(n) 35 wird dann das Einsetzwerkzeug 32 entfernt. Fig. 7 shows the acetabular cup 10, together with an insertion tool 32nd The insertion tool 32 has a head part 33 which dips into the socket 10 and is dimensioned such that it rests against the inner surface 14 of the socket 10 when the socket has its protruding edge formed by the flange parts 26 on a complementary projection 34 of the insertion tool 32 sits on. The acetabular cup 10 can be fixed on the insertion tool 32 by means of one or more clamps 35 . The hip joint socket thus fixed is hammered into the acetabulum during implantation using the insertion tool 32 . The ribs 17 dig into the bone tissue. After loosening the clamping clip (s) 35 , the insertion tool 32 is then removed.

Die Rippen 17 können mit der Metallaußenfläche 15 der Hüftgelenkpfanne 10 ein­ stückig verbunden oder in beliebiger zweckentsprechender Weise an dieser Außenfläche befestigt, z. B. mit dieser laserverschweißt, sein.The ribs 17 can be connected in one piece to the metal outer surface 15 of the acetabular cup 10 or fastened to this outer surface in any suitable manner, for. B. laser welded to this.

In den Fig. 1 und 2 sind kleine Öffnungen 37 angedeutet. In solche fakultativ vorge­ sehene Öffnungen lassen sich im Bedarfsfall Haken einsetzen, um die künstliche Hüft­ gelenkpfanne 10 aus dem Acetabulum zu entfernen.In Figs. 1 and 2, small apertures 37 are indicated. In such optional provided openings can hooks be used if necessary to remove the artificial hip joint socket 10 from the acetabulum.

Claims (14)

1. Künstliche Hüftgelenkpfanne (10) mit mindestens zwei sowohl einen Teil der In­ nenfläche (14) als auch einen Teil der Außenfläche (15) der Pfanne bildenden, re­ lativ steifen Schalensegmenten (11, 12, 13), die untereinander nachgiebig verbun­ den sind, dadurch gekennzeichnet, daß von der Außenfläche (15) mindestens ei­ nes der Schalensegmente (11, 12, 13) mindestens eine Rippe (17) nach außen vor­ steht, wobei die Rippe (17) nahe dem freien Rand (18) des zugehörigen Schalen­ segments angeordnet ist und von dem zugehörigen Schalensegment in einer Ebene absteht, die sich mindestens näherungsweise senkrecht zu derjenigen Ebene er­ streckt, in welcher der freie Schalensegmentrand liegt.1. Artificial acetabular cup ( 10 ) with at least two both part of the inner surface ( 14 ) and part of the outer surface ( 15 ) of the pan forming, relatively rigid shell segments ( 11 , 12 , 13 ), which are flexibly connected to each other , characterized in that at least one rib ( 17 ) projects outwards from the outer surface ( 15 ) of at least one of the shell segments ( 11 , 12 , 13 ), the rib ( 17 ) near the free edge ( 18 ) of the associated shell segments is arranged and protrudes from the associated shell segment in a plane that extends at least approximately perpendicular to the plane in which the free shell segment edge lies. 2. Künstliche Hüftgelenkpfanne nach Anspruch 1, dadurch gekennzeichnet, daß die Rippe (17) mindestens einen abgewinkelten Flansch (20, 24) aufweist.2. Artificial acetabular cup according to claim 1, characterized in that the rib ( 17 ) has at least one angled flange ( 20 , 24 ). 3. Künstliche Hüftgelenkpfanne nach Anspruch 2, dadurch gekennzeichnet, daß der Flansch (20, 24) an dem von der Außenfläche (15) des zugehörigen Schalenseg­ ments (11, 12, 13) abliegenden Ende (19) angeordnet ist.3. Artificial acetabular cup according to claim 2, characterized in that the flange ( 20 , 24 ) on the outer surface ( 15 ) of the associated shell segment ( 11 , 12 , 13 ) remote end ( 19 ) is arranged. 4. Künstliche Hüftgelenkpfanne nach Ansprüchen 2 und 3, dadurch gekennzeichnet, daß die Rippe (17a) L-Form hat.4. Artificial acetabular cup according to claims 2 and 3, characterized in that the rib ( 17 a) has an L-shape. 5. Künstliche Hüftgelenkpfanne nach Ansprüchen 2 und 3, dadurch gekennzeichnet, daß die Rippe (17d) T-Form hat.5. Artificial acetabular cup according to claims 2 and 3, characterized in that the rib ( 17 d) has a T-shape. 6. Künstliche Hüftgelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rippe (17b) mit mindestens einer Ausstanzung (21) zur Bildung mindestens einer Federzunge (22) versehen ist.6. Artificial acetabular cup according to one of the preceding claims, characterized in that the rib ( 17 b) is provided with at least one punch-out ( 21 ) to form at least one spring tongue ( 22 ). 7. Künstliche Hüftgelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rippe (17c) mit mindestens einer durchgehenden Öff­ nung (23) versehen ist.7. Artificial acetabular cup according to one of the preceding claims, characterized in that the rib ( 17 c) is provided with at least one continuous opening ( 23 ). 8. Künstliche Hüftgelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rippe (17) von der Außenfläche (15) des zugehörigen Schalensegments (11, 12, 13) mindestens näherungsweise radial absteht.8. Artificial acetabular cup according to one of the preceding claims, characterized in that the rib ( 17 ) from the outer surface ( 15 ) of the associated shell segment ( 11 , 12 , 13 ) protrudes at least approximately radially. 9. Künstliche Hüftgelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rippe (17) in Abstand von dem freien Rand (18) des zu­ gehörigen Schalenelements (11, 12, 13) angeordnet ist. 9. Artificial acetabular cup according to one of the preceding claims, characterized in that the rib ( 17 ) is arranged at a distance from the free edge ( 18 ) of the associated shell element ( 11 , 12 , 13 ). 10. Künstliche Hüftgelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Rippe (17) aus Metall, insbesondere Titan, gefertigt ist.10. Artificial acetabular cup according to one of the preceding claims, characterized in that the rib ( 17 ) is made of metal, in particular titanium. 11. Künstliche Hüftgelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Außenfläche (15) der Schalensegmente (11, 12, 13) aus Metall, insbesondere Titan, besteht.11. Artificial acetabular cup according to one of the preceding claims, characterized in that the outer surface ( 15 ) of the shell segments ( 11 , 12 , 13 ) consists of metal, in particular titanium. 12. Künstliche Hüftgelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Innenfläche (14) der Schalensegmente (11, 12, 13) aus Kunststoff, insbesondere Polyethylen, besteht.12. Artificial acetabular cup according to one of the preceding claims, characterized in that the inner surface ( 14 ) of the shell segments ( 11 , 12 , 13 ) consists of plastic, in particular polyethylene. 13. Künstliche Hüftgelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schalensegmente (11, 12, 13) an ihrem freien Rand (18) ein nach außen abstehendes Flanschteil (26) aufweisen.13. Artificial acetabular cup according to one of the preceding claims, characterized in that the shell segments ( 11 , 12 , 13 ) have at their free edge ( 18 ) an outwardly projecting flange part ( 26 ). 14. Künstliche Hüftgelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Schalensegmente (11, 12, 13) an ihrem freien Rand (18) derart abgeschrägt sind, daß ihr innenliegendes Ende (28) in einer Ebene liegt, die von dem Pol (29) der Pfanne (10) einen größeren Abstand hat als die Ebene, in welcher das außenliegende Ende (30) des Randes der Schalensegmente liegt.14. Artificial acetabular cup according to one of the preceding claims, characterized in that the shell segments ( 11 , 12 , 13 ) are chamfered on their free edge ( 18 ) such that their inner end ( 28 ) lies in a plane which is from the pole ( 29 ) the pan ( 10 ) has a greater distance than the plane in which the outer end ( 30 ) of the edge of the shell segments lies.
DE19723620A 1997-06-05 1997-06-05 Easily fitted, secure, artificial hip joint socket requiring no screws Withdrawn DE19723620A1 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10062330A1 (en) * 2000-12-15 2002-07-11 Thomas Siebel Press fit socket as a replacement of the hip joint socket comprises a conical ring section with fins providing stability against tilting, and a spherical bottom section
WO2005122970A1 (en) * 2004-06-22 2005-12-29 Plus Orthopedics Ag Device for placing or removing joints or joint sockets
FR2904931A1 (en) * 2006-08-18 2008-02-22 Advanced Technical Fabrication Double mobility acetabulum for reconstituting articulation of hip, has extraction unit, whose notch is provided on surface, where notch is conformed and oriented for engagement and entanglement of end of axial extraction tool of cup
WO2010099123A3 (en) * 2009-02-24 2010-11-04 Mako Surgical Corp. Prosthetic device, method of planning bone removal for implantation of prosthetic device, and robotic system
US7828806B2 (en) 2002-01-10 2010-11-09 Smith And Nephew Orthopaedics Ag Accessory for implanting a hip endoprosthesis, and method for manipulating the same
US9937059B2 (en) 2013-03-08 2018-04-10 Stryker Corporation Bone pads

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10062330B4 (en) * 2000-12-15 2004-08-19 Siebel, Thomas, Dr. Conical spherical pressfit cup to replace the acetabular cup
DE10062330A1 (en) * 2000-12-15 2002-07-11 Thomas Siebel Press fit socket as a replacement of the hip joint socket comprises a conical ring section with fins providing stability against tilting, and a spherical bottom section
US7828806B2 (en) 2002-01-10 2010-11-09 Smith And Nephew Orthopaedics Ag Accessory for implanting a hip endoprosthesis, and method for manipulating the same
WO2005122970A1 (en) * 2004-06-22 2005-12-29 Plus Orthopedics Ag Device for placing or removing joints or joint sockets
US8801724B2 (en) 2004-06-22 2014-08-12 Smith And Nephew Orthopaedics Ag Device for placing or removing joints or joint sockets
FR2904931A1 (en) * 2006-08-18 2008-02-22 Advanced Technical Fabrication Double mobility acetabulum for reconstituting articulation of hip, has extraction unit, whose notch is provided on surface, where notch is conformed and oriented for engagement and entanglement of end of axial extraction tool of cup
WO2010099123A3 (en) * 2009-02-24 2010-11-04 Mako Surgical Corp. Prosthetic device, method of planning bone removal for implantation of prosthetic device, and robotic system
US10085804B2 (en) 2009-02-24 2018-10-02 Mako Surgical Corp. Prosthetic device, method of planning bone removal for implantation of prosthetic device, and robotic system
US11065067B2 (en) 2009-02-24 2021-07-20 Mako Surgical Corp. System and method for preparing bone
US11877812B2 (en) 2009-02-24 2024-01-23 Mako Surgical Corp. System and method for preparing bone
US12193767B2 (en) 2009-02-24 2025-01-14 Mako Surgical Corp. System and method for preparing bone
US9937059B2 (en) 2013-03-08 2018-04-10 Stryker Corporation Bone pads
US10537441B2 (en) 2013-03-08 2020-01-21 Stryker Corporation Bone pads
US11318027B2 (en) 2013-03-08 2022-05-03 Stryker Corporation Bone pads

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