WO1996004866A1 - Artificial joint, in particular for replacing the human hip joint - Google Patents

Artificial joint, in particular for replacing the human hip joint Download PDF

Info

Publication number
WO1996004866A1
WO1996004866A1 PCT/EP1995/003146 EP9503146W WO9604866A1 WO 1996004866 A1 WO1996004866 A1 WO 1996004866A1 EP 9503146 W EP9503146 W EP 9503146W WO 9604866 A1 WO9604866 A1 WO 9604866A1
Authority
WO
WIPO (PCT)
Prior art keywords
joint
socket
pressure distribution
head
distribution body
Prior art date
Application number
PCT/EP1995/003146
Other languages
German (de)
French (fr)
Inventor
Dietmar Kubein-Meesenburg
Hans NÄGERL
Peter Adam
Original Assignee
Theusner, Joachim
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 Theusner, Joachim filed Critical Theusner, Joachim
Priority to AU33434/95A priority Critical patent/AU3343495A/en
Priority to EP95929817A priority patent/EP0774937A1/en
Publication of WO1996004866A1 publication Critical patent/WO1996004866A1/en

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
    • A61F2/32—Joints for the hip
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30324—The prosthesis having different structural features at different locations within the same prosthesis differing in thickness
    • 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
    • A61F2002/3082—Grooves
    • 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
    • A61F2/32—Joints for the hip
    • A61F2002/3208—Bipolar or multipolar joints, e.g. having a femoral head articulating within an intermediate acetabular shell whilst said shell articulates within the natural acetabular socket or within an artificial outer shell
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/345—Acetabular cups the inner and outer (hemi)spherical surfaces of a shell, e.g. an intermediate shell, having distinct centres of rotation, both located on the centre line of the shell
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/348—Additional features
    • A61F2002/349—Shell having a wavy or undulated peripheral rim
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0036—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in thickness

Definitions

  • the present invention relates to an artificial joint, in particular for replacing the human hip joint, consisting of a joint head with a convex, circular cutting contour with the center M x and the radius R and an articular socket with a concave, circular cutting contour and the center M 2 and the Radius R 2 and a pressure distribution body slidably arranged between these two on their functional surfaces, the adjoining sliding surfaces of which have a curvature adapted to the functional surfaces, and the pressure distribution body has a thickness d on the connecting line of the centers of rotation M, and M 2 of the two circular cutting contours of the joint head and has the socket.
  • the radii R 2 and R x are dimensioned such that R 2 > R L + d.
  • the object of the present invention is to improve the artificial joint described at the outset in such a way that the pressure distribution body cannot be dislodged from the joint socket. At the same time, however, easy assembly of the artificial joint, in particular when it is inserted into the human body, is to be ensured.
  • the joint socket has a circumferential edge such that the artificial joint has a swivel range of the joint head in its frontal plane perpendicular to the main functional direction, which is less than 180 °, preferably approximately 120 °.
  • this limitation of the swivel range is brought about by the fact that, in deviation from the equatorial circumferential line of the joint socket, the pan edge has at least one preferably wave-shaped elevation in the frontal plane, in particular two diametrically opposite elevations above the circumferential line.
  • the freedom of movement of the disc in the main functional direction is thus greater than in the plane perpendicular to it, ie in the frontal plane.
  • a slot is formed in the two wave-shaped, diametrically opposite elevations of the joint socket according to the invention, which enables the pressure distribution body to be inserted into the joint socket during the operations. This insertion through the slot takes place with one movement and in one position of the disc, which the disc can no longer carry out or assume after the articulated head has been attached.
  • the joint socket has a peripheral edge such that the joint has a swivel range greater than or equal to 180 ° in its main functional direction.
  • the expansion of the swivel range is advantageously achieved in that the joint socket, in deviation from its equatorial circumferential line based on a semicircular cutting contour, has such a socket edge profile that at least one, in particular, wave-shaped indentation is provided in the area between the two elevations in the main functional direction plane .
  • two diametrically opposed indentations are formed.
  • indentations also allow the pressure distribution body to be inserted into the joint socket if the disc, which is advantageous, coincides with its outer radius with the inner radius of the joint socket and is thus drawn up to approximately the equatorial circumferential line of the joint socket.
  • FIG. 1 is a perspective view of an artificial joint according to the invention in the unmounted state
  • FIG. 3 shows a perspective view of a pressure distribution body
  • FIG. 4 shows a section through an acetabular cup according to FIG. 2 with an inserted pressure distribution body
  • Fig. 5 shows a section through an inventive joint in its functional position.
  • the joint head 1 has a convex, circular cutting contour, so that a joint head ball is formed which is flattened in the region of its shaft attachment la.
  • the socket 2 also has a " circular sectional contour, so that a shell-shaped shell body with a semicircular cross section is formed. This shell body has an equatorial circumferential line X.
  • the pressure distribution body 3 is designed such that its sliding surfaces 6, 7 rest against the functional surfaces 4, 5, ie the functional surface 4 of the socket 2 and the functional surface 5 of the joint head 1, so that its sliding surfaces 6, 7 rest against the functional
  • RSATZBUTT RULE26 surfaces 5 have appropriately adapted curvature.
  • the joint head 1 has, see FIG. 5, the rotation center M 2 and the radius R ⁇ and the joint socket 2 has the rotation center M 2 and the radius R 2 .
  • the pressure distribution body 3 has a thickness d on the connecting line of M 1 and M 2 .
  • the joint parts designed in this way form a dimeric joint chain with two joint axes through M : and M 2 in the inserted state, the radius R of the joint axis path resulting from the relationship
  • R R 2 - R 1 - d, where R 2 > R : + d,
  • This design of the artificial joint requires a pressure-stable joint behavior in every bending or swiveling position of the joint head 1.
  • the socket 2 has a peripheral edge 8 such that the joint according to the invention has a swivel range in its frontal plane Z-Z perpendicular to the main functional direction Y-Y, which is less than 180 °, preferably approximately 120 °.
  • the pan edge 8 deviating from the equatorial circumferential line X in the frontal plane Z-Z, has at least one in particular wave-shaped elevation 9, preferably two diametrically opposite, wave-shaped elevations 9.
  • the joint according to the invention has a swivel range greater than 180 ′′ in its main functional direction Y-Y
  • the pressure distribution body 3 advantageously has an outer radius which, apart from an existing lubrication clearance, corresponds to the radius R 2 , ie the inner radius of the socket 2. 4 shows how the pressure distribution body 3 can be inserted into the joint socket 2 through the slot formed between the wave-shaped elevations 9 in the area of the wave-shaped indentations 10.
  • the disc or pressure distribution body 3 cannot luxie in the event of a possible dislocation of the joint head 1 from the socket 2 ren.
  • the joint parts according to the invention are dimensioned such that the diameter of the joint head 1 is smaller than the distance between the opposing wave-shaped elevations 9, so that the joint head 1 can be used in any case from the open side of the socket 2.
  • the joint head 1 is covered up to the equator XX by the disc, ie by the pressure distribution body 3, in which the pressure distribution body 3 is raised circumferentially by a section 11 up to the equator.
  • the pressure distribution body 3 can be expanded cylindrically in the region of section 11 towards the joint head 1. This additionally complicates luxation of the joint head 1 with respect to the pressure distribution body 3.
  • the present invention is not limited to the embodiment shown. It may be possible within the scope of the invention if the limitation of the pivoting range of the joint head 1 in the frontal plane is realized by a coupling part which can be screwed onto the socket 2.

Abstract

An artificial joint, in particular for replacing the human hip joint, consists of a joint head (1) with a convex circular contour, of a joint socket (2) with a concave circular contour and of a pressure distributing body (3) slidingly arranged between both functional surfaces. The sliding surfaces of the pressure distributing body (3) that lie on the functional surfaces have a curvature adapted to the functional surfaces. The pressure distributing body (3) has a thickness (d) along the line that interconnects the rotation centres of both circular contours of the head (1) and socket (2). The swivelling range of the joint head (1) in the front plane Z-Z perpendicular to the main functional direction Y-Y is smaller than 180° and preferably equals about 120°.

Description

Künstliches Gelenk, insbesondere zum Ersatz des menschlichen HüftgelenksArtificial joint, especially to replace the human hip joint
Die vorliegende Erfindung betrifft ein künstliches Gelenk, insbesondere zum Ersatz des menschlichen Hüftgelenks, bestehend aus einem Gelenkkopf mit konvexer, kreisförmiger Schnittkontur mit dem Mittelpunkt Mx und dem Radius R sowie einer Gelenkpfanne mit konkaver, kreisförmiger Schnittkon¬ tur und dem Mittelpunkt M2 und dem Radius R2 und einem zwischen diesen beiden an deren Funktionsflächen gleitend angeordneten Druckverteilungεkörper, dessen anliegende Gleitflächen eine den Funktionsflächen entsprechend ange¬ paßte Krümmung aufweisen, und der Druckverteilungskörper eine Dicke d auf der Verbindungslinie der Rotationszentren M, und M2 der beiden kreisförmigen Schnittkonturen des Gelenkkopfes und der Gelenkpfanne aufweist.The present invention relates to an artificial joint, in particular for replacing the human hip joint, consisting of a joint head with a convex, circular cutting contour with the center M x and the radius R and an articular socket with a concave, circular cutting contour and the center M 2 and the Radius R 2 and a pressure distribution body slidably arranged between these two on their functional surfaces, the adjoining sliding surfaces of which have a curvature adapted to the functional surfaces, and the pressure distribution body has a thickness d on the connecting line of the centers of rotation M, and M 2 of the two circular cutting contours of the joint head and has the socket.
Ein derartiges künstliches Gelenk ist aus der deutschen Patentanmeldung P 39 08 958.4-35 bekannt. Hierbei handelt es sich um ein künstliches Gelenk, dessen Gelenkteile derart dimensioniert sind, daß es sich um ein druckstabiles Gelenk mit fünf Freiheitsgraden handelt. Eei diesem Gelenk bilden die einzelnen Gelenkachsen eine dimere Gelenkkette, wobei der Radius der Gelenkachsenbahn R sich wie folgt berechnet: R = R, - R, - d .Such an artificial joint is known from German patent application P 39 08 958.4-35. This is an artificial joint, the joint parts of which are dimensioned such that it is a pressure-stable joint with five degrees of freedom. In this joint, the individual joint axes form a dimeric joint chain, the radius of the joint axis path R being calculated as follows: R = R, - R, - d.
Hierbei sind die Radien R2 und Rx derart bemessen, daß R2 > RL + d ist. Bei diesem Gelenk besteht die Gefahr, daß der Druckverteilungskörper aus der Gelenkpfanne luxieren, d.h. sich herausbewegen, kann, wenn der Gelenkkopf extreme Schwenkbewegungen durchführt.The radii R 2 and R x are dimensioned such that R 2 > R L + d. With this joint there is a risk that the pressure distribution body can luxate out of the joint socket, ie move out, if the joint head performs extreme pivoting movements.
Der vorliegenden Erfindung liegt die Aufgabe zugrunde, das eingangs beschriebene künstliche Gelenk derart zu verbes¬ sern, daß eine Luxation des Druckverteilungskörpers aus der Gelenkpfanne nicht möglich ist. Gleichzeitig soll aber ein leichtes Zusammensetzen des künstlichen Gelenks, insbeson¬ dere bei dem Einsetzen in den menschlichen Körper, gewähr¬ leistet sein.The object of the present invention is to improve the artificial joint described at the outset in such a way that the pressure distribution body cannot be dislodged from the joint socket. At the same time, however, easy assembly of the artificial joint, in particular when it is inserted into the human body, is to be ensured.
Erf ndungsgemäß wird dies dadurch erreicht, daß die Ge¬ lenkpfanne einen derart umlaufenden Rand aufweist, daß das künstliche Gelenk in seiner zur Hauptfunktionsrichtung senkrechten Frontalebene einen Schwenkbereich des Gelenk¬ kopfes aufweist, der kleiner 180°, vorzugsweise ca. 120° beträgt. Erfindungsgemäß wird diese Einschränkung des Schwenkbereiches dadurch bewirkt, daß der Pfannenrand abweichend von der äquatorialen Umfangslinie der Gelenk¬ pfanne in der Frontalebene mindestens eine vorzugsweise wellenbergför ige Erhebung, insbesondere zwei diametral gegenüberliegende Erhebungen oberhalb der Umfangslinie besitzt. Durch diese wellenbergförmigen Erhebungen oberhalb der äquatorialen Umfangslinie wird verhindert, daß der Druckverteilungskörper aus der Gelenkpfanne luxieren kann. Erfindungsgemäß ist der Bewegungsfreiraum des Diskus in der Hauptfunktionsrichtung somit größer als in der dazu senk¬ rechten Ebene, d.h. in der Frontalebene. Zwischen den beiden wellenbergförmigen, diametral gegenüberliegenden Erhebungen der erfindungsgemäßen Gelenkpfanne wird ein Schlitz gebildet, der es ermöglicht, bei der Operationen den Druckverteilungskörper durch diesen hindurch in die Gelenkpfanne einzulegen. Dieses Einlegen durch den Schlitz hindurch erfolgt mit einer Bewegung und in einer Lage des Diskus, die dieser nicht mehr nach dem Anbringen des Gelenkkopfes durchführen bzw. einnehmen kann.According to the invention, this is achieved in that the joint socket has a circumferential edge such that the artificial joint has a swivel range of the joint head in its frontal plane perpendicular to the main functional direction, which is less than 180 °, preferably approximately 120 °. According to the invention, this limitation of the swivel range is brought about by the fact that, in deviation from the equatorial circumferential line of the joint socket, the pan edge has at least one preferably wave-shaped elevation in the frontal plane, in particular two diametrically opposite elevations above the circumferential line. These wave-shaped elevations above the equatorial circumference prevent the pressure distribution body from luxating out of the socket. According to the invention, the freedom of movement of the disc in the main functional direction is thus greater than in the plane perpendicular to it, ie in the frontal plane. Between A slot is formed in the two wave-shaped, diametrically opposite elevations of the joint socket according to the invention, which enables the pressure distribution body to be inserted into the joint socket during the operations. This insertion through the slot takes place with one movement and in one position of the disc, which the disc can no longer carry out or assume after the articulated head has been attached.
Weiterhin ist erfindungsgemäß von Vorteil, wenn die Gelenk¬ pfanne einen derart umlaufenden Rand aufweist, daß das Gelenk in seiner Hauptfunktionsrichtung einen Schwenkbe¬ reich größer/gleich 180° besitzt. Die Erweiterung des Schwenkbereichs wird vorteilhafterweise dadurch erzielt, daß die Gelenkpfanne abweichend von ihrer äquatorialen Umfangslinie basierend auf einer halbkreisförmigen Schnitt¬ kontur einen derartigen Pfannenrandverlauf besitzt, daß im Bereich zwischen den beiden Erhebungen in der Hauptfunk- tionsrichtungsebene mindestens eine insbesondere wellen- talförmige Einbuchtung vorgesehen ist. Vorzugsweise sind zwei diametral gegenüberliegende Einbuchtungen ausgebildet. Diese Einbuchtungen ermöglichen auch das Einlegen des Druckverteilungskörpers in die Gelenkpfanne, wenn der Diskus, was vorteilhaft ist, mit seinem äußeren Radius mit dem Innenradius der Gelenkpfanne übereinstimmt und somit bis etwa zu der äquatorialen Umfangslinie der Gelenkpfanne hochgezogen ist.It is also advantageous according to the invention if the joint socket has a peripheral edge such that the joint has a swivel range greater than or equal to 180 ° in its main functional direction. The expansion of the swivel range is advantageously achieved in that the joint socket, in deviation from its equatorial circumferential line based on a semicircular cutting contour, has such a socket edge profile that at least one, in particular, wave-shaped indentation is provided in the area between the two elevations in the main functional direction plane . Preferably two diametrically opposed indentations are formed. These indentations also allow the pressure distribution body to be inserted into the joint socket if the disc, which is advantageous, coincides with its outer radius with the inner radius of the joint socket and is thus drawn up to approximately the equatorial circumferential line of the joint socket.
Weitere vorteilhafte Ausführungen der Erfindung sind in den Unteransprüchen enthalten.Further advantageous embodiments of the invention are contained in the subclaims.
Anhand des in den beiliegenden Zeichnungen dargestellten Ausführungsbeispiels wird die Erfindung näher erläutert.The invention is explained in more detail with reference to the exemplary embodiment illustrated in the accompanying drawings.
c\ Es zeigen:c \ Show it:
Fig. 1 eine perspektivische Ansicht eines erfindungs¬ gemäßen künstlichen Gelenks in nichtmontiertem Zustand,1 is a perspective view of an artificial joint according to the invention in the unmounted state,
Fig. 2 eine perspektivische Ansicht einer erfindungs¬ gemäßen Gelenkpfanne,2 shows a perspective view of a joint socket according to the invention,
Fig. 3 eine perspektivische Ansicht eines Druckvertei¬ lungskörpers,3 shows a perspective view of a pressure distribution body,
Fig. 4 einen Schnitt durch eine Gelenkpfanne gemäß Fig. 2 mit eingelegtem Druckverteilungskörper undFIG. 4 shows a section through an acetabular cup according to FIG. 2 with an inserted pressure distribution body and
Fig. 5 einen Schnitt durch ein erfindungsgemäßes Gelenk in seiner Funktionsstellung.Fig. 5 shows a section through an inventive joint in its functional position.
In Fig. 1 ist dargestellt, daß ein erfindungsgemäßes künstliches Gelenk aus einer Gelenkpfanne 2 und einem Gelenkkopf 1 sowie einem Druckverteilungskörper 3 gebildet ist. Der Gelenkkopf 1 besitzt eine konvexe, kreisförmige Schnittkontur, so daß eine Gelenkkopfkugel ausgebildet ist, die im Bereich ihres Schaftansatzes la abgeflacht ist. Die Gelenkpfanne 2 weist ebenfalls eine" kreisförmige Schnitt¬ kontur auf, so daß sich ein schalenförmiger, im Querschnitt halbkreisförmiger Schalenkörper ausbildet. Dieser-Schalen¬ körper besitzt eine äquatoriale Umfangslinie X. Der Druck¬ verteilungskörper 3 ist derart ausgebildet, daß seine Gleitflächen 6, 7 an den Funktionsflächen 4, 5, d.h. der Funktionsfl che 4 der Gelenkpfanne 2 und der Funktions¬ fläche 5 des Gelenkkopfes 1, anliegen, so daß seine Gleit¬ flächen 6, 7 eine an die jeweils anliegenden Funktions-1 shows that an artificial joint according to the invention is formed from a joint socket 2 and a joint head 1 and a pressure distribution body 3. The joint head 1 has a convex, circular cutting contour, so that a joint head ball is formed which is flattened in the region of its shaft attachment la. The socket 2 also has a " circular sectional contour, so that a shell-shaped shell body with a semicircular cross section is formed. This shell body has an equatorial circumferential line X. The pressure distribution body 3 is designed such that its sliding surfaces 6, 7 rest against the functional surfaces 4, 5, ie the functional surface 4 of the socket 2 and the functional surface 5 of the joint head 1, so that its sliding surfaces 6, 7 rest against the functional
RSATZBUTT REGEL26) flächen 5 entsprechend angepaßte Krümmung aufweisen. Was die Ausgestaltung des künstlichen Gelenks betrifft, so wird auf die deutsche Patentanmeldung P 39 08 958.4-35, ins¬ besondere Fig. 3 mit zugehöriger Beschreibung, verwiesen. Der Gelenkkopf 1 besitzt, siehe Fig. 5, das Rotationszen¬ trum M2 und den Radius Rα und die Gelenkpfanne 2 besitzt das Rotationszentrum M2 und den Radius R2. Der Druckverteilungs¬ körper 3 besitzt eine Dicke d auf der Verbindungslinie von M1 und M2. Die derart ausgestalteten Gelenkteile bilden im eingesetzten Zustand eine dimere Gelenkkette mit zwei Gelenkachsen durch M: und M2, wobei der Radius R der Gelenkachsenbahn sich aus der Beziehung ergibtRSATZBUTT RULE26) surfaces 5 have appropriately adapted curvature. With regard to the design of the artificial joint, reference is made to the German patent application P 39 08 958.4-35, in particular FIG. 3 with the associated description. The joint head 1 has, see FIG. 5, the rotation center M 2 and the radius R α and the joint socket 2 has the rotation center M 2 and the radius R 2 . The pressure distribution body 3 has a thickness d on the connecting line of M 1 and M 2 . The joint parts designed in this way form a dimeric joint chain with two joint axes through M : and M 2 in the inserted state, the radius R of the joint axis path resulting from the relationship
R = R2 - R1 - d, wobei R2 > R: + d ist,R = R 2 - R 1 - d, where R 2 > R : + d,
Diese Ausgestaltung des künstlichen Gelenks bedingt ein druckstabiles Gelenkverhalten in jeder Beuge- bzw. Schwenk¬ stellung des Gelenkkopfes 1.This design of the artificial joint requires a pressure-stable joint behavior in every bending or swiveling position of the joint head 1.
Erfindungsgemäß ist nun vorgesehen, daß die Gelenkpfanne 2 einen derart umlaufenden Rand 8 aufweist, daß das erfin¬ dungsgemäße Gelenk in seiner zur Hauptfunktionsrichtung Y-Y senkrechten Frontalebene Z-Z einen Schwenkbereich aufweist, der kleiner 180°, vorzugsweise ca. 120° beträgt. Dies wird dadurch erreicht, daß der Pfannenrand 8 abweichend von der äquatorialen Umfangslinie X in der Frontalebene Z-Z minde¬ stens eine insbesondere wellenbergförmige Erhebung 9, vor¬ zugsweise zwei diametral gegenüberliegende, wellenbergför¬ mige Erhebungen 9 besitzt. Weiterhin ist es zweckmäßig, wenn das erfindungsgemäße Gelenk in seiner Hauptfunktions- richtung Y-Y ein Schwenkbereich größer 180" aufweist. Dieser erweiterte Schwenkbereich wird dadurch bedingt, daß die Gelenkpfanne 2 im Bereich der HauptfunktionsrichtungAccording to the invention, it is now provided that the socket 2 has a peripheral edge 8 such that the joint according to the invention has a swivel range in its frontal plane Z-Z perpendicular to the main functional direction Y-Y, which is less than 180 °, preferably approximately 120 °. This is achieved in that the pan edge 8, deviating from the equatorial circumferential line X in the frontal plane Z-Z, has at least one in particular wave-shaped elevation 9, preferably two diametrically opposite, wave-shaped elevations 9. Furthermore, it is expedient if the joint according to the invention has a swivel range greater than 180 ″ in its main functional direction Y-Y
" mindestens eine insbesondere wellentalförmige Einbuchtung 10 bildet. Vorzugsweise sind zwei diametral gegenüber¬ liegende, wellentalförmige Einbuchtungen 10 ausgebildet. Wie insbesondere Fig. 5 zu entnehmen ist, besitzt der Druckverteilungskörper 3 vorteilhafterweise einen äußeren Radius, der bis auf ein vorhandenes Lubrikationsspiel mit dem Radius R2, d.h. dem Innenradius der Gelenkpfanne 2 übereinstimmt. In Fig. 4 ist dargestellt, wie der Druckver¬ teilungskörper 3 durch den zwischen den wellenbergförmigen Erhebungen 9 im Bereich der wellentalförmigen Einbuchtungen 10 gebildeten Schlitz in die Gelenkpfanne 2 eingelegt werden kann. Jedoch kann der Diskus bzw. Druckverteilungs¬ körper 3 aufgrund der erfindungsgemäßen Einschränkung des Schwenkbereichs in der Frontalebene Z-Z und der damit verbundenen Ausdehnung der Gelenkpfanne 2 über die äquato¬ riale Umfangslinie X hinaus nicht bei einer eventuellen Luxation des Gelenkkopfes 1 aus der Gelenkpfanne 2 luxie¬ ren. Weiterhin sind die erfindungsgemäßen Gelenkteile derart dimensioniert, daß der Durchmesser des Gelenkkopfes 1 kleiner ist als der Abstand der gegenüberliegenden wellenbergförmigen Erhebungen 9, so daß der Gelenkkopf 1 in jedem Falle von der offenen Seite der Gelenkpfanne 2 her eingesetzt werden kann. " forms at least one in particular wave-shaped indentation 10. Two diametrically opposed, trough-shaped indentations 10 are preferably formed. As can be seen in particular in FIG. 5, the pressure distribution body 3 advantageously has an outer radius which, apart from an existing lubrication clearance, corresponds to the radius R 2 , ie the inner radius of the socket 2. 4 shows how the pressure distribution body 3 can be inserted into the joint socket 2 through the slot formed between the wave-shaped elevations 9 in the area of the wave-shaped indentations 10. However, owing to the limitation according to the invention of the swivel range in the frontal plane ZZ and the associated expansion of the socket 2 beyond the equatorial circumferential line X, the disc or pressure distribution body 3 cannot luxie in the event of a possible dislocation of the joint head 1 from the socket 2 ren. Furthermore, the joint parts according to the invention are dimensioned such that the diameter of the joint head 1 is smaller than the distance between the opposing wave-shaped elevations 9, so that the joint head 1 can be used in any case from the open side of the socket 2.
Weiterhin kann es vorteilhaft sein, wenn der Gelenkkopf 1 bis zum Äquator X-X hin vom Diskus, d.h. vom Druckver¬ teilungskörper 3, bedeckt ist, in dem der Druckverteilungs¬ körper 3 um einen Abschnitt 11 umfangsgemäß bis zum Äquator hochgezogen ist. Zusätzlich kann in einer weiteren Aus¬ führung der Druckverteilungskörper 3 im Bereich des Ab¬ schnittes 11 zum Gelenkkopf 1 hin zylindrisch erweitert sein. Dadurch wird zusätzlich ein Luxieren des Gelenkkopfes 1 gegenüber dem Druckverteilungskörper 3 erschwert. Die vorliegende Erfindung ist nicht auf die gezeigte Aus¬ führungsform beschränkt. So kann es im Rahmen der Erfindung möglich sein, wenn die Einschränkung des Schwenkbereiches des Gelenkkopfes 1 in der Frontalebene durch ein Überwurf¬ teil realisiert wird, der auf die Gelenkpfanne 2 auf¬ schraubbar ist.Furthermore, it can be advantageous if the joint head 1 is covered up to the equator XX by the disc, ie by the pressure distribution body 3, in which the pressure distribution body 3 is raised circumferentially by a section 11 up to the equator. In a further embodiment, the pressure distribution body 3 can be expanded cylindrically in the region of section 11 towards the joint head 1. This additionally complicates luxation of the joint head 1 with respect to the pressure distribution body 3. The present invention is not limited to the embodiment shown. It may be possible within the scope of the invention if the limitation of the pivoting range of the joint head 1 in the frontal plane is realized by a coupling part which can be screwed onto the socket 2.
ER3ATZ3 ATT(REGLL 2b, ER3ATZ3 ATT (REGLL 2b,

Claims

AnsprücheExpectations
Künstliches Gelenk, insbesondere zum Ersatz des menschlichen Hüftgelenks, bestehend aus einem Gelenk¬ kopf (1) mit konvexer, kreisförmiger Schnittkontur sowie einer Gelenkpfanne (2) mit konkaver, kreisförmi¬ ger Schnittkontur und einem zwischen deren beiden Funktionsflächen gleitend angeordneten Druckvertei¬ lungskörper (3), dessen an den Funktionsflächen anliegenden Gleitflächen eine den Funktionsflachen entsprechend angepaßte Krümmung aufweisen und der Druckverteilungskörper (3) eine Dicke d auf der Verbindungslinie der Rotationszentren der beiden kreisförmigen Schnittkonturen des Gelenkkopfes ( 1 ) und der Gelenkpfanne (2) aufweist, d a d u r c h g e k e n n z e i c h n e t , daß in der zur Hauptfunktionsrichtung Y-Y senkrechten Fron¬ talebene Z-Z der Schwenkbereich des Gelenkkopfes (1) kleiner 180°, vorzugsweise ca. 120° beträgt.Artificial joint, in particular to replace the human hip joint, consisting of an articulated head (1) with a convex, circular cutting contour and an articular socket (2) with a concave, circular cutting contour and a pressure distribution body (3 ), the sliding surfaces of which lie on the functional surfaces have a curvature which is matched to the functional surfaces and the pressure distribution body (3) has a thickness d on the connecting line of the centers of rotation of the two circular sectional contours of the joint head (1) and the joint socket (2), characterized in that in the front plane ZZ perpendicular to the main functional direction YY, the swivel range of the joint head (1) is less than 180 °, preferably approximately 120 °.
Künstliches Gelenk nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t , daß die Gelenkpfanne (2) eine halbkreisförmige Schnittkontur mit einer äquatorialen Umfangslinie X aufweist, wobei abweichend von der äquatorialen Umfangslinie X in der Frontalebene Z-Z mindestens eine vorzugsweise wellen- bergförmige Erhebung (9) oberhalb der Umfangslinie ausgebildet ist.Artificial joint according to claim 1, characterized in that the joint socket (2) has a semicircular cutting contour with an equatorial circumferential line X, wherein deviating from the equatorial circumferential line X in the frontal plane ZZ, at least one preferably wave-shaped elevation (9) is formed above the circumferential line.
Künstliches Gelenk nach Anspruch 2, d a d u r c h g e k e n n z e i c h n e t , daß zwei diametral einander gegenüberliegende Erhebungen ( 9 ) vorhanden sind.Artificial joint according to claim 2, so that two diametrically opposite elevations (9) are present.
Künstliches Gelenk nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t , daß die Gelenkpfanne (2) einen derart umlaufenden Rand (8) aufweist, daß das Gelenk in seiner Hauptfunktions- richtungs-Ebene Y-Y einen Schwenkbereich größer/gleich 180° besitzt.Artificial joint according to one of claims 1 to 3, so that the joint socket (2) has a circumferential edge (8) such that the joint has a swivel range greater than or equal to 180 ° in its main functional direction plane Y-Y.
Künstliches Gelenk nach Anspruch 4, d a d u r c h g e k e n n z e i c h n e t , daß der Pfannenrand (8) im Bereich der Hauptfunktionsrich- tungs-Ebene Y-Y mindestens eine insbesondere wellen¬ talförmige Einbuchtung (10), vorzugsweise zwei ein¬ ander diametral gegenüberliegende Einbuchtungen (10), unterhalb der äquatorialen Umfangslinie X besitzt.Artificial joint according to claim 4, characterized in that the socket edge (8) in the area of the main functional direction plane YY has at least one in particular wave-shaped indentation (10), preferably two diametrically opposed indentations (10), below the equatorial circumferential line X owns.
Gelenk nach einem der Ansprüche 1 bis 5, d a d u r c h g e k e n n z e i c h n e t , daß der Druckverteilungskörper (3) mit seinem äußeren Radius in der Grundstellung bis zur äquatorialen Umfangslinie X der Gelenkpfanne (2) hochgezogen ist.Joint according to one of claims 1 to 5, so that the pressure distribution body (3) is raised with its outer radius in the basic position up to the equatorial circumferential line X of the joint socket (2).
Gelenk nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t , daß derJoint according to one of claims 1 to 6, d a d u r c h g e k e n n z e i c h n e t that the
ERSATZBLATT (REGEL 2*) Gelenkkopf ( 1 ) bis zu seinem Äquator vom Druckver¬ teilungskörper (3) in der Grundstellung bedeckt wird.REPLACEMENT SHEET (RULE 2 *) The joint head (1) is covered up to its equator by the pressure distribution body (3) in the basic position.
Gelenk nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t , daß der Druckverteilungskörper (3) bis zum Äquator X-X der Gelenkpfanne (2) durch einen Erweiterungs-Abschnitt (11) hochgezogen ist, wobei in diesem Erweiterungs-Ab¬ schnitt (11) die Funktionsfläche zum Gelenkkopf (1) hin zylindrisch geformt ist.Joint according to claim 6, characterized in that the pressure distribution body (3) is pulled up to the equator XX of the joint socket (2) by an extension section (11), the functional surface of the joint head (1 ) is cylindrical in shape.
ERSATZBLATT GELC SPARE SHEET GELC
PCT/EP1995/003146 1994-08-11 1995-08-08 Artificial joint, in particular for replacing the human hip joint WO1996004866A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU33434/95A AU3343495A (en) 1994-08-11 1995-08-08 Artificial joint, in particular for replacing the human hip joint
EP95929817A EP0774937A1 (en) 1994-08-11 1995-08-08 Artificial joint, in particular for replacing the human hip joint

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944428407 DE4428407A1 (en) 1994-08-11 1994-08-11 Artificial joint, especially to replace the human hip joint
DEP4428407.1 1994-08-11

Publications (1)

Publication Number Publication Date
WO1996004866A1 true WO1996004866A1 (en) 1996-02-22

Family

ID=6525413

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/003146 WO1996004866A1 (en) 1994-08-11 1995-08-08 Artificial joint, in particular for replacing the human hip joint

Country Status (4)

Country Link
EP (1) EP0774937A1 (en)
AU (1) AU3343495A (en)
DE (1) DE4428407A1 (en)
WO (1) WO1996004866A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6610097B2 (en) 2000-03-15 2003-08-26 Depuy Orthopaedics, Inc. Prosthetic cup assembly which includes components possessing self-locking taper and associated method
EP1442727A2 (en) * 2003-01-31 2004-08-04 Ceramtec AG Hip joint prosthesis
US7074241B2 (en) 2000-03-14 2006-07-11 Smith & Nephew, Inc. Variable geometry rim surface acetabular shell liner
US7326253B2 (en) 2001-11-16 2008-02-05 Depuy Products, Inc. Prosthetic cup assembly having increased assembly congruency
US7682398B2 (en) 2000-03-14 2010-03-23 Smith & Nephew, Inc. Variable geometry rim surface acetabular shell liner
US9445904B2 (en) 2009-07-14 2016-09-20 Biomet Manufacturing, Llc Multiple bearing acetabular prosthesis
US9445903B2 (en) 2008-11-24 2016-09-20 Biomet Manufacturing, Llc Multi-bearing acetabular prosthesis

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2793674B1 (en) * 1999-05-19 2001-10-19 Olivier Himmer MEDIALIZED COTYLOIDIAN IMPLANT WITH MOBILE CORE
JP4354181B2 (en) * 2000-07-31 2009-10-28 ザ・ジェネラル・ホスピタル・コーポレイション Improved acetabular component that reduces the risk of dislocation
US7695521B2 (en) * 2001-05-01 2010-04-13 Amedica Corporation Hip prosthesis with monoblock ceramic acetabular cup
FR2845890B1 (en) * 2002-10-18 2005-07-08 Dedienne Sante COTYLOID IMPLANT OF HIP PROSTHESIS
FR2850861B1 (en) * 2003-02-12 2005-09-30 Ortho Id SPHERICAL TRIPLE JOINT IMPLANT SYSTEM FOR HIGHER OR LOWER MEMBER
GB0321582D0 (en) * 2003-09-15 2003-10-15 Benoist Girard Sas Prosthetic acetabular cup and prosthetic femoral joint incorporating such a cup
EP1781214B1 (en) 2004-08-09 2020-06-03 Ortho - I.D. Sarl Ball-type triple-joint implant system for upper or lower limbs
CA2669179A1 (en) * 2006-11-13 2008-05-29 Ralph H. Lewis Extended range of motion, constrained prosthetic hip-joint
DE102006062618A1 (en) * 2006-12-29 2008-07-03 Plus Orthopedics Ag Hip joint prosthesis, particularly to place spherical joint shell for regulation, comprises metallic outer shell, inlay that is anchored in outer shell and has articulating or bearing surface for femoral condyle

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2413078A1 (en) * 1978-01-03 1979-07-27 Serole Michelle Hip prosthesis made of composite materials - has low wt. which assists swimming and can also be used for other body joints
FR2430221A1 (en) * 1978-07-06 1980-02-01 Gmt Medizinische Technik Gmbh ENDOPROSTHESIS
US4524467A (en) * 1983-11-21 1985-06-25 Joint Medical Products Corp. Apparatus for constraining a socket bearing in an artificial joint
WO1990011062A1 (en) * 1989-03-18 1990-10-04 Kubein Meesenburg Dietmar Artificial joint
DE9101766U1 (en) * 1991-02-15 1991-07-04 Blencke, Bernd-August, Prof.Dr.Med.Habil., 3436 Hessisch Lichtenau, De
US5044422A (en) * 1990-10-01 1991-09-03 Lenker Charles A Cryogenic processing of orthopedic implants
DE4140838C1 (en) * 1991-12-11 1993-05-06 Dietmar Prof. Dr. 3350 Kreiensen De Kubein-Meesenburg
DE9312150U1 (en) * 1993-08-13 1993-10-28 Tschirren & Co Joint prosthesis, especially for a hip or shoulder joint

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2413078A1 (en) * 1978-01-03 1979-07-27 Serole Michelle Hip prosthesis made of composite materials - has low wt. which assists swimming and can also be used for other body joints
FR2430221A1 (en) * 1978-07-06 1980-02-01 Gmt Medizinische Technik Gmbh ENDOPROSTHESIS
US4524467A (en) * 1983-11-21 1985-06-25 Joint Medical Products Corp. Apparatus for constraining a socket bearing in an artificial joint
WO1990011062A1 (en) * 1989-03-18 1990-10-04 Kubein Meesenburg Dietmar Artificial joint
US5044422A (en) * 1990-10-01 1991-09-03 Lenker Charles A Cryogenic processing of orthopedic implants
DE9101766U1 (en) * 1991-02-15 1991-07-04 Blencke, Bernd-August, Prof.Dr.Med.Habil., 3436 Hessisch Lichtenau, De
DE4140838C1 (en) * 1991-12-11 1993-05-06 Dietmar Prof. Dr. 3350 Kreiensen De Kubein-Meesenburg
DE9312150U1 (en) * 1993-08-13 1993-10-28 Tschirren & Co Joint prosthesis, especially for a hip or shoulder joint

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7074241B2 (en) 2000-03-14 2006-07-11 Smith & Nephew, Inc. Variable geometry rim surface acetabular shell liner
US7682398B2 (en) 2000-03-14 2010-03-23 Smith & Nephew, Inc. Variable geometry rim surface acetabular shell liner
US6610097B2 (en) 2000-03-15 2003-08-26 Depuy Orthopaedics, Inc. Prosthetic cup assembly which includes components possessing self-locking taper and associated method
US7326253B2 (en) 2001-11-16 2008-02-05 Depuy Products, Inc. Prosthetic cup assembly having increased assembly congruency
EP1442727A2 (en) * 2003-01-31 2004-08-04 Ceramtec AG Hip joint prosthesis
DE10304102A1 (en) * 2003-01-31 2004-08-12 Ceram Tec Ag Innovative Ceramic Engineering hip prosthesis
EP1442727A3 (en) * 2003-01-31 2005-01-12 Ceramtec AG Hip joint prosthesis
US9445903B2 (en) 2008-11-24 2016-09-20 Biomet Manufacturing, Llc Multi-bearing acetabular prosthesis
US9445904B2 (en) 2009-07-14 2016-09-20 Biomet Manufacturing, Llc Multiple bearing acetabular prosthesis

Also Published As

Publication number Publication date
AU3343495A (en) 1996-03-07
DE4428407A1 (en) 1996-02-15
EP0774937A1 (en) 1997-05-28

Similar Documents

Publication Publication Date Title
EP0808619B1 (en) Elbow joint endroprosthesis
WO1996004866A1 (en) Artificial joint, in particular for replacing the human hip joint
DE69921546T2 (en) Modular shoulder joint socket
EP0590241B1 (en) Artificial shoulder joint
DE2903366C3 (en) Joint endoprosthesis
EP0560141B1 (en) Intervertebral disc endoprosthesis
DE69914765T2 (en) BALL JOINT, IN PARTICULAR AS A HIP JOINT PROSTHESIS
DE69922723T2 (en) Knee prosthesis with four articular surfaces
DE69917698T2 (en) Acetabular cup prosthesis with ring locking mechanism
DE69725052T2 (en) Connecting pin for multi-part orthopedic implant
DE2005537C3 (en) Joint prosthesis
EP0734701A2 (en) Artificial joint
DE2628530B2 (en) Shoulder joint prosthesis
DE2823306A1 (en) PROSTHESIS FOR HIP ELASTIC PAN
DE2063547A1 (en) Elbow joint prosthesis
DE3908958A1 (en) ARTIFICIAL JOINT
DE3903832A1 (en) Socket part for a joint prosthesis
EP0174531A2 (en) Joint endoprosthesis
EP0388745A1 (en) Hip joint cup for cementless implantation into the acetabulum cavity
DE102008017394A1 (en) knee replacement
DE202008004709U1 (en) knee replacement
EP3714840B1 (en) Acetabular cup for a hip joint endoprosthesis
DE60011957T2 (en) Offset acetabulum implant with movable insert
EP0969781B1 (en) Artificial condyle for the human hip joint
DE102006062618A1 (en) Hip joint prosthesis, particularly to place spherical joint shell for regulation, comprises metallic outer shell, inlay that is anchored in outer shell and has articulating or bearing surface for femoral condyle

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AM AT AU BB BG BR BY CA CH CN CZ DE DK EE ES FI GB GE HU IS JP KE KG KP KR KZ LK LR LT LU LV MD MG MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TT UA UG US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1995929817

Country of ref document: EP

ENP Entry into the national phase

Ref country code: US

Ref document number: 1997 793435

Date of ref document: 19970210

Kind code of ref document: A

Format of ref document f/p: F

WWP Wipo information: published in national office

Ref document number: 1995929817

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: CA

WWW Wipo information: withdrawn in national office

Ref document number: 1995929817

Country of ref document: EP