DE4445892A1 - Endoprosthesis with conical insert connection - Google Patents

Endoprosthesis with conical insert connection

Info

Publication number
DE4445892A1
DE4445892A1 DE19944445892 DE4445892A DE4445892A1 DE 4445892 A1 DE4445892 A1 DE 4445892A1 DE 19944445892 DE19944445892 DE 19944445892 DE 4445892 A DE4445892 A DE 4445892A DE 4445892 A1 DE4445892 A1 DE 4445892A1
Authority
DE
Grant status
Application
Patent type
Prior art keywords
conical
ball head
endoprosthesis
head
bore
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Withdrawn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
DE19944445892
Other languages
German (de)
Inventor
Hartmut Kaelberer
Hans-Georg Pfaff
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.)
Cerasiv GmbH Innovatives Keramik-Engineering
Original Assignee
Cerasiv GmbH Innovatives Keramik-Engineering
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

Links

Classifications

    • AHUMAN NECESSITIES
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    • 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
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    • A61F2/3609Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
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    • A61F2/4603Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
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    • A61F2002/30332Conically- or frustoconically-shaped protrusion and recess
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    • A61F2002/30332Conically- or frustoconically-shaped protrusion and recess
    • A61F2002/30339Double cones, i.e. connecting element having two conical connections, one at each of its opposite ends
    • A61F2002/30341Double cones, i.e. connecting element having two conical connections, one at each of its opposite ends both cones being convex, i.e. male tapers
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    • A61F2002/30405Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves
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    • 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
    • A61F2/40Joints for shoulders
    • A61F2/4014Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
    • A61F2002/4037Connections of heads to necks
    • 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
    • A61F2/40Joints for shoulders
    • A61F2/4014Humeral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic humeral shafts
    • A61F2002/4037Connections of heads to necks
    • A61F2002/404Connections of heads to necks with a clearance between proximal end of neck and inner end of head
    • 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
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4681Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by applying mechanical shocks, e.g. by hammering
    • 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • 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
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017Angular shapes
    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063Three-dimensional shapes
    • A61F2230/0067Three-dimensional shapes conical
    • 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00011Metals or alloys
    • A61F2310/00023Titanium or titanium-based alloys, e.g. Ti-Ni alloys
    • 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00179Ceramics or ceramic-like structures

Abstract

The double conical adaptor piece (9) has a conical part at either end. On one end is fixed a ceramic ball head (1) which has a conical bore into which one conical pin (4) of the adaptor piece extends. The ball head is fixed into the adaptor piece by hitting it with a suitable instrument. There is an axial bore (5) through the middle of the adaptor piece, with an internal thread in which a securing screw (2) is located which has a truncated conical point (3). In the conical pin, two projecting pins (6a,6b) are arranged vertically to the longitudinal axis (8) of the conical pin and have one end touching the point of the securing screw and the other projecting into a slot (7) running circumferentially in the conical bore of the ceramic head.

Description

Die Erfindung betrifft eine Endoprothese nach dem Oberbegriff des Anspruchs 1 bzw. 5. The invention relates to an endoprosthesis according to the preamble of claim 1 and 5 respectively.

Modular aufgebaute Prothesensysteme werden üblicherweise durch konische Steckverbindungen miteinander verbunden. Modular prosthetic systems are usually connected to each other by conical plug-in connections. Dies gilt insbesondere für die Verbindung von Kugelköpfen an Prothesenstielen, wie sie für die Hüft-, Hand- und Schulter-Endoprothetik üblich sind. This is especially true for the connection of ball heads on prosthesis sticks, as are customary for the hip, hand and shoulder replacement surgery. Dabei werden die Kugelköpfe erst während der Operation durch einen Schlag mit einem entsprechenden Einschlaginstrument auf dem Steckkonus fixiert. The ball heads are fixed only during the operation by a blow with a corresponding impactor on the plug-in cone.

In der EP-B1-0 474 015 ist eine modular aufgebaute Endoprothese mit einem Prothesenstiel und einem Kugelkopf gezeigt, wobei der Kugelkopf über eine konische Steckverbindung mit dem Prothesenstiel verbunden ist. In EP-B1-0 474 015 a modular endoprosthesis with a prosthesis stem and a spherical head is shown wherein the ball head is connected via a conical plug connection with the prosthesis stem. Zur Verbesserung der Verbindung ist die konische Steckverbindung zusätzlich über eine Sicherungsschraube gesichert. To improve the connection, the conical plug connection is additionally secured by a locking screw. Die Sicherungsschraube ist hierzu in eine Bohrung mit einem Innengewinde im Kugelkopf eingedreht und wirkt mit einer Ausnehmung im konischen Zapfen zusammen, derart, daß durch Eindrehen der Sicherungsschraube der konische Zapfen in den Kugelkopf eingedrückt wird. The locking screw is screwed into this, a bore with an internal thread in the spherical head, and cooperates with a recess in the conical pin together, so that is pressed by tightening the tightening screw of the conical pin in the spherical head. Hierzu weist die Sicherungsschraube eine kegel- oder kegelstumpfförmige Spitze auf. For this purpose, the locking screw in a conical or frustoconical tip.

Nachteilig an dieser Ausführungsform ist, daß sie nicht geeignet ist für keramische Kugelköpfe, da Bohrungen mit einem Gewinde in keramischen Kugelköpfen kaum herzustellen sind. A disadvantage of this embodiment is that it is not suitable for ceramic ball heads, since holes are hardly produced with a thread in a ceramic ball heads. Außerdem ist nachteilig, daß in der Gleitfläche eine Bohrung eingebracht ist. In addition, it is disadvantageous that in the sliding surface a bore is made. Hierdurch ist ein erhöhtes Verschleißrisiko gegeben. In this way, an increased risk of wear is given.

Der Erfindung liegt die Aufgabe zugrunde, eine modular aufgebaute Endoprothese nach dem Oberbegriff des Anspruchs 1 derart zu verbessern, daß in der Gleitfläche des Kugelkopfes keine Bohrung angeordnet ist. The invention has for its object to improve a modular endoprosthesis according to the preamble of claim 1 such that no hole is arranged in the sliding surface of the ball head. Außerdem soll die Endoprothese für keramische Kugelköpfe geeignet sein. In addition, the endoprosthesis is to be suitable for ceramic ball heads.

Erfindungsgemäß wird diese Aufgabe in einer ersten Ausführungsform dadurch gelöst, daß im konischen Zapfen der Steckverbindung eine sich in Axialrichtung erstreckende Bohrung mit einem Innengewinde angeordnet ist, in die die Sicherungsschraube eingedreht ist, und daß im konischen Zapfen zumindest zwei die Wandung durchragende Stifte angeordnet sind, die mit ihrem einen Ende auf der Spitze der Sicherungsschraube aufliegen und mit ihrem anderen Ende in eine Ausnehmung in der konischen Bohrung des Kugelkopfes hineinragen. According to the invention this object is achieved in a first embodiment in that an axially extending bore with an internal thread in the conical pins of the connector, into which the securing screw is screwed, and in that two the wall by protruding pins are arranged in the conical pin at least, resting at one end on the head of the locking screw with her and protrude with their other end in a recess in the conical bore of the ball head.

Durch die erfindungsgemäße Sicherungsschraube in Axialrichtung des konischen Zapfens und die mit der Sicherungsschraube zusammenwirkenden Stifte ist die Gleitfläche des Kugelkopfes ohne Eingriffe herzustellen. The inventive locking screw in the axial direction of the taper pin and the cooperating with the locking screw pins, the sliding surface of the ball head is to be manufactured without intervention. Das Verschleißrisiko ist hierdurch wesentlich vermindert. The risk of wear is thereby substantially reduced.

Beim Zusammenbau wird der Kugelkopf auf den konischen Zapfen gesetzt und mit einem Einschlaginstrument fixiert. In assembling the ball head is placed on the conical peg and fixed with an impactor. Anschließend wird die Sicherungsschraube verdreht, wodurch die Stifte über die kegel- oder kegelstumpfförmige Spitze nach außen in die Ausnehmung in der konischen Bohrung des Kugelkopfes gedrückt werden. Subsequently, the locking screw is rotated, whereby the pins are pressed on the conical or frustoconical tip to the outside in the recess in the conical bore of the ball head.

Vorteilhafterweise ist der Kugelkopf aus Keramik gefertigt. Advantageously, the ball head is made of ceramic. Erst die erfindungsgemäße Sicherungsmöglichkeit macht die Verwendung von keramischen Kugelköpfen möglich. Only the fuse possibility invention makes the use of ceramic ball heads possible.

Eine vorteilhafte Ausführungsform zeichnet sich dadurch aus, daß die zumindest zwei Stifte im wesentlichen senkrecht zur Längsachse des konischen Zapfens angeordnet sind und mit der Ausnehmung exzentrisch zusammenwirken, so daß durch Spreizung der Stifte der konische Zapfen in Längsrichtung in den Kugelkopf eingedrückt wird. An advantageous embodiment is characterized in that the at least two pins are arranged substantially perpendicular to the longitudinal axis of the conical plug and eccentric cooperate with the recess so that is pressed by spreading the pins of the conical pin in the longitudinal direction in the ball head.

In einer alternativen vorteilhaften Ausführungsform sind zumindest zwei Stifte im spitzen Winkel zur Axialrichtung des Zapfens angeordnet, so daß durch Spreizung der Stifte der konische Zapfen in Längsrichtung in den Kugelkopf eingedrückt wird. In an alternative advantageous embodiment, two pins at an acute angle to the axial direction of the stud are arranged at least so as to be suppressed by spreading the pins of the conical pin in the longitudinal direction in the ball head.

Wird der Kugelkopf bzw. der Prothesenkopf auf Zug beansprucht, so kann es bei beiden Varianten auch bei langer Tragezeit zu keiner Lockerung des Prothesenkopfes kommen. If the ball head or the head of the prosthesis subjected to train, so there can be no loosening of the prosthesis head in both variants even during long periods of use. Eine solche Lockerung würde nämlich eine Reoperation des Patienten zur Folge haben. Such a relaxation would in fact have a reoperation of the patient.

Zweckmäßigerweise ist die Ausnehmung in der konischen Bohrung des Kugelkopfes eine Nut, insbesondere eine umlaufende Nut. Conveniently, the recess is in the tapered bore of the ball head has a groove, in particular an encircling groove. Hierdurch kann der Kugelkopf in beliebiger Drehrichtung auf den konischen Zapfen aufgebracht werden. In this way, the ball head in any direction of rotation can be applied to the conical pin.

Eine bevorzugte alternative Ausführungsform einer modular aufgebauten Endoprothese mit einem Prothesenkopf und einem Kugelkopf, wobei der Kugelkopf über eine konische Steckverbindung mit dem Prothesenstiel verbunden ist und die konische Steckverbindung über zusätzliche Sicherungsmittel gesichert ist, zeichnet sich dadurch aus, A preferred alternative embodiment of a modular stent with a prosthetic head and a ball head, the ball head is connected via a conical plug connection with the prosthesis stem and the conical plug connection is secured by additional securing means, characterized by the fact,

  • - daß im konischen Zapfen der Steckverbindung eine den konischen Zapfen vollständig durchragende Bohrung angeordnet ist, - that the conical pins projecting completely through bore is arranged in the conical pins of the plug-in connection,
  • - daß in der Bohrung eine Sicherungsschraube auf einem Innengewinde eingedreht ist, - that in the bore of a locking screw is screwed on an internal thread,
  • - daß die Sicherungsschraube ein axiales Verlängerungsstück aufweist, - that the locking screw has an axial extension piece,
  • - daß eine Hülse das in den Kugelkopf hineinragende Ende des Zapfens umgreift und mit dem Verlängerungsstück verbunden ist, und - that a sleeve surrounds the protruding into the ball head end of the pin and is connected to the extension piece, and
  • - daß durch Verdrehen der Sicherungsschraube die Hülse axial verschiebbar ist. - that the sleeve is axially displaceable by rotating the securing screw.

Durch Verdrehen der Sicherungsschraube kann so eine bessere Verankerung des Zapfens im Kugelkopf erreicht werden. By turning the locking screw a better anchoring of the pin in the ball head can thus be achieved. Vorteilhaft wird die erfindungsgemäße Endoprothese in der Hand- oder Schulterprothetik eingesetzt. the endoprosthesis according to the invention is advantageously used in the hand or shoulder prosthesis. Sie eignet sich jedoch auch für Hüftgelenke. However, it is also suitable for hip joints.

In vorteilhafter erfindungsgemäßer Ausführungsform ist zwischen Kugelkopf und Prothesenstiel ein Adapterstück mit mindestens einem Konus angeordnet. In an advantageous embodiment of the invention, an adapter piece is arranged with at least one taper between the ball head and the prosthesis stem. Das dem Kugelkopf entgegengesetzte Ende des Adapterstückes ist dem Prothesenstiel angepaßt. The opposite end of the spherical head of the adapter piece is adapted to the prosthesis stem.

Vorteilhafterweise ist das Adapterstück ein Winkelstück. Advantageously, the adapter piece is an angle piece. Hierdurch ist leicht eine räumliche Orientierung des Prothesenkopfes zu erreichen. This makes is easy to achieve a spatial orientation of the prosthesis head. Ferner kann über die Länge des Adapterstücks der Abstand vom Gelenkkopf zum Prothesenstiel variiert werden. Furthermore, can be varied from the joint head to the prosthesis stem over the length of the adapter piece of the distance.

Weitere Merkmale der Erfindung zeigen die Figuren, die nachfolgend eingehend beschrieben sind. Further features of the invention show the figures which are described in detail below.

Es zeigt It shows

Fig. 1 ein Doppelkonus-Adapterstück mit aufgesetztem Kugelkopf und einer Stiftverankerung, Fig. 1 shows a double-cone adapter piece with mounted ball head and a pin keeping,

Fig. 2 ein Doppelkonus-Adapterstück mit aufgesetztem Kugelkopf und einem alternativem Sicherungsmittel über eine verschiebbare Hülse. Fig. 2 shows a double-cone adapter piece with mounted ball head and an alternative securing means on a sliding sleeve.

Fig. 1 zeigt ein Doppelkonus-Adapterstück 9 mit je einem Konus auf jedem Ende. Fig. 1 shows a double-cone adapter piece 9, each with a taper on each end. Auf einem Konus ist ein keramischer Kugelkopf 1 aufgesetzt. On a cone, a ceramic ball head 1 is placed. Der Kugelkopf 1 weist hierzu eine konische Bohrung auf, in die das Adapterstück 9 mit ihrem konischen Zapfen 4 hineinragt. For this purpose, the ball head 1 has a conical hole into which protrudes the adapter piece 9 with its conical pin. 4 Durch einen Schlag auf den Kugelkopf 1 mit einem entsprechenden Einschlaginstrument wird der Kugelkopf 1 auf dem Adapterstück 9 befestigt. By a blow to the ball head 1 with a corresponding impact tool of the ball head 1 is mounted on the adapter piece. 9

Im Adapterstück 9 bzw. im konischen Zapfen 4 ist eine sich in Axialrichtung erstreckende Bohrung 5 mit einem Innengewinde angeordnet, in die eine Sicherungsschraube 2 eingedreht ist. In the adapter piece 9 and the conical pin 4 extending in the axial direction of bore 5 is provided with an internal thread, into which a locking screw 2 is screwed. Die Sicherungsschraube 2 weist eine kegelstumpfförmige Spitze 3 auf. The securing bolt 2 has a frustoconical tip. 3 Weiterhin sind im konischen Zapfen 4 zwei die Wandung durchragende Stifte 6 a, 6 b diametral gegenüberliegend angeordnet. Further, in the conical pins 4, two projecting through the wall of pins 6 a, b arranged diametrically opposite. 6 Diese Stifte 6 a, 6 b sind in der in Fig. 1 gezeigten Ausführungsform senkrecht zur Längsachse 8 des konischen Zapfens 4 angeordnet und liegen mit ihrem einen Ende auf der Spitze 3 der Sicherungsschraube 2 auf. These pins 6 a, 6 b are disposed in the embodiment shown in FIG. 1, perpendicular to the longitudinal axis 8 of the conical plug 4 and lying with its one end on the tip 3 of the locking screw 2. Das andere Ende der Stifte 6 a, 6 b ragt in eine Ausnehmung 7 in der konischen Bohrung des Kugelkopfes 1 hinein. The other end of the pins 6 a, 6 b extends into a recess 7 in the conical bore of the ball head. 1 Diese Ausnehmung 7 ist zweckmäßigerweise eine umlaufende Nut. This recess 7 is suitably a circumferential groove.

Wenn der keramische Kugelkopf 1 auf den konischen Zapfen 4 aufgesteckt ist, wird er, wie schon ausgeführt, mit einem gezielten Schlag mit einem Einschlaginstrument auf den konischen Zapfen 4 gepreßt. When the ceramic ball head is mounted on the tapered cones 4 1, it is, as already stated, pressed with a targeted impact with an impact instrument to the conical pin. 4 Damit ist der Kugelkopf 1 eigentlich fest mit dem Zapfen 4 verbunden. So that the ball head 1 is actually fixed to the pin. 4 Zusätzlich wird die Sicherungsschraube 2 noch im Gewinde verdreht, derart, daß die Stifte 6 a, 6 b nach außen gedrückt werden und an der Innenwand der Ausnehmung anliegen. In addition, the securing bolt 2 is further rotated in the thread, so that the pins 6 a, 6 are pressed b outward and rest against the inner wall of the recess. Wie aus dem vergrößertem Ausschnitt aus Fig. 1 zu ersehen ist, wirken die Stifte 6 a, 6 b exzentrisch mit der Ausnehmung zusammen. As can be seen from the enlarged detail of FIG. 1, the pins 6 6 b act a, eccentrically with the recess together. Hierdurch wird durch die Spreizung der Stifte 6 a, 6 b der Kugelkopf 1 auf den konischen Zapfen 4 bzw. auch umgekehrt gezogen. In this way by the spreading of the pins 6 a, 6 b of the ball head 1 to the conical pin 4 or vice versa drawn. Zum Drehen der Sicherungsschraube 2 ist im Schraubenboden ein Eingriff 10 zur Aufnahme eines Werkzeuges vorgesehen. For rotating the securing screw 2 in the screw bottom an engagement 10 for receiving a tool is provided.

Das Doppelkonus-Adapterstück 9 mit aufgesetztem Kugelkopf wird anschließend mit einem Prothesenstiel auf die verschiedenste Art und Weise befestigt. The double-cone adapter piece 9 with an attached ball head is then fixed with a prosthesis stem in the most diverse ways.

Fig. 2 zeigt ein Doppelkonus-Adapterstück 9 mit je einem Konus auf jedem Ende und einem aufgesetzten Kugelkopf 1 . Fig. 2 shows a double-cone adapter piece 9, each with a taper on each end and a mounted ball head 1. Gegenüber der Ausführungsform gemäß Fig. 1 zeichnet sich diese Ausführungsform durch andere Sicherungsmittel aus. Compared to the embodiment according to Fig. 1, this embodiment is characterized by other securing means. Im konischen Zapfen 4 ist eine axial durch laufende Bohrung 20 angeordnet. In a conical pin 4 is axially running bore through twentieth In diese Bohrung 20 ist auf einem Gewinde 21 eine Sicherungsschraube 2 eingedreht. In this bore 20, a securing screw 2 is screwed onto a threaded 21st Zum leichteren Eindrehen weist die Sicherungsschraube 2 einen Eingriff 24 auf. To facilitate screwing 2, the securing screw engaging a 24th Auf dem dem Eingriff 24 entgegengesetztem Ende der Sicherungsschraube 2 ist diese mit einem Verlängerungsstück 22 versehen. On the opposite end the engagement 24 of the locking screw 2, this is provided with an extension piece 22nd Dieses Verlängerungsstück 22 ragt etwas aus dem konischen Zapfen 4 hervor und ist mit einer Hülse 23 verbunden, welche das in den Kugelkopf hineinragende Ende des Zapfens 4 mit mehreren Armen umgreift. This extension piece 22 projects slightly from the conical pin 4 and is connected to a sleeve 23 which surrounds the protruding into the ball head end of the pin 4 with a plurality of arms. Die Festlegung der Hülse 23 erfolgt über eine Schraube 25 , wobei die Hülse 23 mit ihrem oberen Ende zwischen der Schraube 25 und der oberen Stirnseite des Zapfens 4 angeordnet ist. The fixing of the sleeve 23 via a screw 25, the sleeve 23 is disposed with its upper end between the screw 25 and the upper end face of the pin. 4 Sie kann auch nur mit Spiel eingelegt sein. It can also be inserted with play. Die Hülse 23 ist vorzugsweise selbst wie der Zapfen 4 und die Bohrung im Kugelkopf 1 konisch ausgebildet. The sleeve 23 is preferably conical itself as the pin 4 and the hole in the ball head. 1 Die Hülse 23 ist aus Metall, wie z. The sleeve 23 is made of metal such. B. Titan gefertigt. B. titanium.

Durch Verdrehen der Sicherungsschraube 2 weg vom Kugelkopf 1 wird die Hülse 23 an den Zapfen 4 gezogen. By turning the locking screw 2 away from the ball head 1, the sleeve is pulled on the pins 4 23rd Hierdurch weitet sich die Hülse 23 auf, wodurch eine bessere Verankerung des Zapfens 4 im Kugelkopf 1 erreicht wird. In this way, the sleeve 23 expands, creating a better anchoring of the pin 4 is achieved in the spherical head. 1

Claims (9)

  1. 1. Modular aufgebaute Endoprothese mit einem Prothesenstiel und einem Kugelkopf ( 1 ), wobei der Kugelkopf ( 1 ) über eine konische Steckverbindung mit dem Prothesenstiel verbunden ist, die konische Steckverbindung zusätzlich über eine Sicherungsschraube ( 2 ) gesichert ist und die Sicherungsschraube ( 2 ) eine kegel- oder kegelstumpfförmige Spitze ( 3 ) aufweist, dadurch gekennzeichnet, 1. Modular endoprosthesis with a prosthesis stem and a ball head (1) being connected to the ball head (1) via a conical plug connection with the prosthesis stem, the conical plug connector also has a locking screw (2) is secured and the locking screw (2) conical or frustoconical tip (3), characterized in that
    • - daß im konischen Zapfen ( 4 ) der Steckverbindung eine sich in Axialrichtung erstreckende Bohrung ( 5 ) mit einem Innengewinde angeordnet ist, in die die Sicherungsschraube ( 2 ) eingedreht ist, und - that in the conical journal (4) of the plug connection is arranged an axially extending bore (5) with an internal thread, is screwed into the securing bolt (2), and
    • - daß im konischen Zapfen ( 4 ) zumindest zwei die Wandung durchragende Stifte ( 6 a, 6 b) angeordnet sind, die mit ihrem einen Ende auf der Spitze ( 3 ) der Sicherungsschraube ( 2 ) aufliegen und mit ihrem anderen Ende in eine Ausnehmung ( 7 ) in der konischen Bohrung des Kugelkopfes ( 1 ) hineinragen. - that in the conical journal (4) at least two of the wall by protruding pins (6 a, 6 b) are arranged, which rest with their one end on the tip (3) of the securing bolt (2) and (at its other end in a recess 7) (in the conical bore of the ball head 1) protrude.
  2. 2. Endoprothese nach Anspruch 1, dadurch gekennzeichnet, daß die zumindest zwei Stifte ( 6 a, 6 b) im wesentlichen senkrecht zur Längsachse ( 8 ) des konischen Zapfens ( 4 ) angeordnet sind und mit der Ausnehmung ( 7 ) exzentrisch zusammenwirken, so daß durch Spreizung der Stifte ( 6 a, 6 b) der konische Zapfen ( 4 ) in Längsrichtung in den Kugelkopf ( 4 ) eingedrückt wird. 2. Endoprosthesis according to claim 1, characterized in that the at least two pins (6 a, 6 b) are arranged substantially perpendicular to the longitudinal axis (8) of the conical journal (4) and the recess cooperate (7) eccentrically so that by spreading the pins (6 a, 6 b) is pressed in the conical journal (4) in the longitudinal direction in the ball head (4).
  3. 3. Endoprothese nach Anspruch 1, dadurch gekennzeichnet, daß die zumindest zwei Stifte ( 6 a, 6 b) im spitzen Winkel zur Axialrichtung des Zapfens ( 4 ) angeordnet sind, so daß durch Spreizung der Stifte ( 6 a, 6 b) der konische Zapfen ( 4 ) in Längsrichtung in den Kugelkopf ( 1 ) eingedrückt wird. 3. An endoprosthesis according to claim 1, characterized in that the at least two pins (6 a, 6 b) are arranged at an acute angle to the axial direction of the pin (4) so that by spreading the pins (6 a, 6 b) of the conical pin (4) in the longitudinal direction in the ball head (1) is pressed.
  4. 4. Endoprothese nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Ausnehmung ( 7 ) in der konischen Bohrung des Kugelkopfes ( 1 ) eine Nut, insbesondere eine umlaufende Nut ist. 4. An endoprosthesis according to one of claims 1 to 3, characterized in that the recess (7) in the conical bore of the ball head (1) has a groove, in particular a peripheral groove.
  5. 5. Modular aufgebaute Endoprothese mit einem Prothesenstiel und einem Kugelkopf ( 1 ), wobei der Kugelkopf ( 1 ) über eine konische Steckverbindung mit dem Prothesenstiel verbunden ist und die konische Steckverbindung über zusätzliche Sicherungsmittel gesichert ist, dadurch gekennzeichnet, 5. Modular endoprosthesis with a prosthesis stem and a ball head (1), wherein the ball head (1) is connected via a conical plug connection with the prosthesis stem and the conical plug connection is secured by additional securing means, characterized in that
    • - daß im konischen Zapfen ( 4 ) der Steckverbindung eine den konischen Zapfen ( 4 ) vollstündig durchragende Bohrung ( 20 ) angeordnet ist, - that in the conical journal (4) of the plug connection is a conical pin (4) vollstündig projecting through bore (20) is arranged,
    • - daß in der Bohrung ( 20 ) eine Sicherungsschraube ( 2 ) auf einem Innengewinde ( 21 ) eingedreht ist, - in that the bore (20) a locking screw (2) is screwed on an internal thread (21),
    • - daß die Sicherungsschraube ( 2 ) ein axiales Verlängerungsstück ( 22 ) aufweist, - that the securing bolt (2) has an axial extension piece (22),
    • - daß eine Hülse ( 23 ) das in den Kugelkopf ( 1 ) hineinragende Ende des Zapfens ( 4 ) umgreift und mit dem Verlängerungsstück ( 22 ) verbunden ist, und Encompasses that a sleeve (23) projecting into the into the ball head (1) end of the pin (4) and is connected to the extension piece (22), and -
    • - daß durch Verdrehen der Sicherungsschraube ( 2 ) die Hülse ( 23 ) axial verschiebbar ist. - that the sleeve (23) is axially displaceable by turning the locking screw (2).
  6. 6. Endoprothese nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß zwischen Kugelkopf ( 1 ) und Prothesenstiel ein Adapterstück ( 9 ) mit mindestens einem Konus angeordnet ist. 6. Endoprosthesis according to one of claims 1 to 5, characterized in that between the ball head (1) and a prosthesis stem adapter piece (9) is arranged with at least one cone.
  7. 7. Endoprothese nach Anspruch 6, dadurch gekennzeichnet, daß das Adapterstück ( 9 ) ein Winkelstück ist. 7. Endoprosthesis according to claim 6, characterized in that the adapter piece (9) is an angle piece.
  8. 8. Endoprothese nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß der Kugelkopf ( 1 ) aus Keramik gefertigt ist. 8. Endoprosthesis according to one of claims 1 to 7, characterized in that the ball head (1) is made of ceramic.
  9. 9. Endoprothese nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die Endoprothese in der Hand- oder Schulterprothetik verwendet wird. 9. Endoprosthesis according to one of claims 1 to 8, characterized in that the endoprosthesis is in the hand or shoulder prosthetic is used.
DE19944445892 1994-12-22 1994-12-22 Endoprosthesis with conical insert connection Withdrawn DE4445892A1 (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0792628A3 (en) * 1996-02-29 1998-03-25 Werner Scholz Endoprosthesis for an artificial hip joint
EP0872222A1 (en) * 1997-04-18 1998-10-21 Headcorn Instrumentation Ltd. Shoulder prosthesis
DE20120241U1 (en) * 2001-12-14 2003-04-24 Keramed Medizintechnik Gmbh Endoprosthesis
FR2832309A1 (en) * 2001-11-21 2003-05-23 Jean Claude Bouvet Femoral rod for hip prosthesis has foot with femoral rod receiving insert with shoulder to engage hemispherical cap
EP1405614A2 (en) * 2002-09-30 2004-04-07 Depuy Products, Inc. Shoulder prosthesis
JP2005193045A (en) * 2003-12-30 2005-07-21 Depuy Products Inc Joint prosthesis with head to have unlimited potential of positioning
DE102004043700A1 (en) * 2004-09-09 2006-03-16 Plus Endoprothetik Ag Endoprosthesis for a metatarsophalangeal
US7875082B2 (en) * 2008-05-09 2011-01-25 Remi Sciences, Inc. Ulnar head prosthesis system
US8002838B2 (en) 2008-06-11 2011-08-23 Depuy Products, Inc. Joint prosthesis with positionable head
US8052755B2 (en) * 2008-05-09 2011-11-08 Remi Sciences, Inc. Ulnar head prosthesis system
US8273093B2 (en) 2004-06-29 2012-09-25 Depuy Products, Inc. Instrumentation for recording and replicating orthopaedic implant orientation
US8444698B2 (en) 2004-12-29 2013-05-21 Depuy Products, Inc. Joint prosthesis with infinitely positionable head
US8460390B2 (en) 2004-12-29 2013-06-11 Depuy Products, Inc. System and method for replicating orthopaedic implant orientation
US8679185B2 (en) 2005-09-30 2014-03-25 DePuy Synthes Products, LLC Joint prosthesis with positionable head

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EP0474015A1 (en) * 1990-09-07 1992-03-11 Waldemar Link (GmbH & Co.) Endoprosthesis
FR2689756A1 (en) * 1992-04-08 1993-10-15 Fabrication Etu Realisa Implan Articulated joint head - has offset shank with recesses at various points for locking screw to give improved positioning

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0474015A1 (en) * 1990-09-07 1992-03-11 Waldemar Link (GmbH & Co.) Endoprosthesis
DE4028510C2 (en) * 1990-09-07 1994-12-01 Link Waldemar Gmbh Co endoprosthesis
FR2689756A1 (en) * 1992-04-08 1993-10-15 Fabrication Etu Realisa Implan Articulated joint head - has offset shank with recesses at various points for locking screw to give improved positioning

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0792628A3 (en) * 1996-02-29 1998-03-25 Werner Scholz Endoprosthesis for an artificial hip joint
US6136036A (en) * 1996-02-29 2000-10-24 Scholz; Werner Endoprosthesis for an artificial hip-joint
US6015437A (en) * 1997-04-18 2000-01-18 Headcorn Instrumentation Ltd. Shoulder prosthesis
EP0872222A1 (en) * 1997-04-18 1998-10-21 Headcorn Instrumentation Ltd. Shoulder prosthesis
FR2832309A1 (en) * 2001-11-21 2003-05-23 Jean Claude Bouvet Femoral rod for hip prosthesis has foot with femoral rod receiving insert with shoulder to engage hemispherical cap
DE20120241U1 (en) * 2001-12-14 2003-04-24 Keramed Medizintechnik Gmbh Endoprosthesis
EP1405614A3 (en) * 2002-09-30 2005-11-16 Depuy Products, Inc. Shoulder prosthesis
EP1405614A2 (en) * 2002-09-30 2004-04-07 Depuy Products, Inc. Shoulder prosthesis
JP2005193045A (en) * 2003-12-30 2005-07-21 Depuy Products Inc Joint prosthesis with head to have unlimited potential of positioning
EP1550420A3 (en) * 2003-12-30 2005-08-17 Depuy Products, Inc. Joint prosthesis with infinitely positionable head
JP4658591B2 (en) * 2003-12-30 2011-03-23 デピュイ・プロダクツ・インコーポレイテッド Joint prosthesis having an infinitely positionable head
US8419798B2 (en) 2003-12-30 2013-04-16 Depuy Products, Inc. Joint prosthesis with infinitely positionable head
US8808306B2 (en) 2004-06-29 2014-08-19 DePuy Synthes Products, LLC Instrumentation for recording and replicating orthopaedic implant orientation
US8968327B2 (en) 2004-06-29 2015-03-03 DePuy Synthes Products, LLC Instrumentation for recording and replicating orthopaedic implant orientation
US8273093B2 (en) 2004-06-29 2012-09-25 Depuy Products, Inc. Instrumentation for recording and replicating orthopaedic implant orientation
US8585711B2 (en) 2004-06-29 2013-11-19 DePuy Synthes Products, LLC Instrumentation for recording and replicating orthopaedic implant orientation
DE102004043700A1 (en) * 2004-09-09 2006-03-16 Plus Endoprothetik Ag Endoprosthesis for a metatarsophalangeal
US9132012B2 (en) 2004-12-29 2015-09-15 DePuy Synthes Products, Inc. Joint prosthesis with infinitely positionable head
US8444698B2 (en) 2004-12-29 2013-05-21 Depuy Products, Inc. Joint prosthesis with infinitely positionable head
US8460390B2 (en) 2004-12-29 2013-06-11 Depuy Products, Inc. System and method for replicating orthopaedic implant orientation
US8562686B2 (en) 2004-12-29 2013-10-22 DePuy Synthes Products, LLC Joint prosthesis with infinitely positionable head
US9925047B2 (en) 2004-12-29 2018-03-27 DePuy Synthes Products, Inc. Method of implanting joint prosthesis with infinitely positionable head
US8679185B2 (en) 2005-09-30 2014-03-25 DePuy Synthes Products, LLC Joint prosthesis with positionable head
US9681954B2 (en) 2005-09-30 2017-06-20 DePuy Synthes Products, Inc. Joint prosthesis system with positionable head
US9913720B2 (en) 2005-09-30 2018-03-13 DePuy Synthes Products, Inc. Joint prosthesis system with positionable head
US7875082B2 (en) * 2008-05-09 2011-01-25 Remi Sciences, Inc. Ulnar head prosthesis system
US8052755B2 (en) * 2008-05-09 2011-11-08 Remi Sciences, Inc. Ulnar head prosthesis system
US8002838B2 (en) 2008-06-11 2011-08-23 Depuy Products, Inc. Joint prosthesis with positionable head

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