EP1432365A2 - Endoprothese pour l'articulation du genou - Google Patents

Endoprothese pour l'articulation du genou

Info

Publication number
EP1432365A2
EP1432365A2 EP02754103A EP02754103A EP1432365A2 EP 1432365 A2 EP1432365 A2 EP 1432365A2 EP 02754103 A EP02754103 A EP 02754103A EP 02754103 A EP02754103 A EP 02754103A EP 1432365 A2 EP1432365 A2 EP 1432365A2
Authority
EP
European Patent Office
Prior art keywords
guide
rotation
endoprosthesis according
bearing part
bearing
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Withdrawn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
EP02754103A
Other languages
German (de)
English (en)
Inventor
Willi Horber
André Bähler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1432365A2 publication Critical patent/EP1432365A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/38—Joints for elbows or knees
    • A61F2/3868—Joints for elbows or knees with sliding tibial bearing
    • 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
    • A61F2/38—Joints for elbows or knees
    • A61F2/3859—Femoral components
    • 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
    • A61F2/38—Joints for elbows or knees
    • A61F2/389—Tibial components
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A61F2002/30133—Rounded shapes, e.g. with rounded corners kidney-shaped or bean-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30153—Convex polygonal shapes rectangular
    • 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
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
    • A61F2002/3039—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove with possibility of relative movement of the rib within the groove
    • A61F2002/30392—Rotation
    • A61F2002/30393—Rotation with additional means for limiting said rotation
    • 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
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
    • A61F2002/3039—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove with possibility of relative movement of the rib within the groove
    • A61F2002/30398—Sliding
    • A61F2002/304—Sliding with additional means for limiting said sliding
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30574—Special structural features of bone or joint prostheses not otherwise provided for with an integral complete or partial collar or flange
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A—HUMAN NECESSITIES
    • 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
    • A61F2002/30772—Apertures or holes, e.g. of circular cross section
    • A61F2002/30777—Oblong apertures
    • 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
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A61F2230/0015—Kidney-shaped, e.g. bean-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017—Angular shapes
    • A61F2230/0019—Angular shapes rectangular

Definitions

  • the invention relates to an endoprosthesis for a knee joint according to the preamble of claim 1, with a femoral joint part which has condylar skids and fastening means for anchoring the femur joint part in the femur, a tibia part which has a tibia plateau and fastening means for anchoring the tibia part in the tibia the tibial plateau on which the bearing part slidably lies, which has concave bearing shells for receiving the sliding runners of the femoral joint part, and cooperating guides on the tibial plateau and bearing part, for guiding the sliding movement of the bearing part on the tibial plateau.
  • the femoral condyles on the articular surface of the tibial plateau shift from ventral to dorsal as a result of a translational movement guided by the cruciate ligaments.
  • cruciate ligaments in particular the posterior one of a knee joint to be replaced by a prosthesis
  • the translation movement can no longer be controlled. It is then advisable to use a prosthesis that does not have the option of translation and only allows a rotational movement in addition to the flexion and extension function.
  • the two different guides on the bearing part can be arranged side by side or one behind the other or overlapping in areas. It is also possible to design the guide parts in such a way that they are arranged in two use positions rotated by 180 degrees with respect to one another.
  • the outer (outline) shape of the bearing part as well as the arrangement and configuration of the bearing shells on the top of the bearing part independently of the respective position of use.
  • the location of the first axis of rotation with respect to the tibia part advantageously coincides with the location of the second axis of rotation. This is the case at least in the flexion position of the knee.
  • the first axis of rotation can be displaceable together with the translation movement. However, it can also be immovable and remain in the same place during a translation.
  • the direction of the translational movement can be independent of the rotational position of the guide on the bearing part with respect to the guide on the tibial plateau. However, it can also depend on the rotational position of the bearing part relative to the tibial plateau.
  • the axes of rotation can be arranged on a central axis of the tibia part extending from anterior to posterior, as well as outside of such.
  • two parallel legs are advantageously provided in one guide at a distance of 2R and in the other guide a guide body with at least two concentric circular sections with radius R, which cooperate with the guide legs.
  • a convex circular path in one guide and a concave circular guide cooperating with the circular path in the other guide are advantageously provided, which cooperate over at least one angular range to the extent of the rotational latitude desired for the prosthesis.
  • the guide body advantageously has the convex circular path.
  • a boundary track with at least one circular section on a radius S is advantageously present on the one guide, and a boundary guide cooperating with the circular sections of the boundary track at a distance from S to the center of the radius R is present on the other.
  • Boundary path and boundary guide can be designed such that in the first position, ie when the first function type is activated, translation and Rotation, when the knee is stretched, the rotation is restricted or prevented, similar to the case with a healthy knee.
  • a first guide surface lying on a rotation surface about a rotation axis lying perpendicular to the tibial plateau and a second guide surface concentrically thereto are advantageously formed.
  • a third guide surface cooperating with the first guide surface is formed with a radius corresponding to the radius of the first guide surface, and a fourth guide surface interacting with the second guide surface. In both positions of use, this allows rotation about an axis perpendicular to the tibial plateau, which rotation is advantageously guided by the concentric guide surfaces in the flexion position of the joint with a flat support. The rotation can be limited.
  • a movement space is advantageously formed in the anterior-posterior direction, which is available in the first position of use, which enables translation and rotation. In the second operating position, which only allows one rotation, this movement space is expediently not available. In the latter case, the two pairs of contact surfaces, each with the play technically necessary for the rotation, are necessarily in contact with one another.
  • Both pairs of contact surfaces are advantageously formed by a guide track and the lateral surface of a guide body arranged in the guide track.
  • At least one guide track has two parallel guide legs, and the guide body arranged in this guide track has lateral surfaces which interact with the guide track. These lateral surfaces lie on a circular line, the diameter of which corresponds to the distance between the guide legs.
  • more than a single diameter is of course matched to more than a single distance.
  • the guide body and the guideway can be graduated one above the other or integrated into one another.
  • a second, narrow guideway for the second, smaller guiding body, which is arranged in the first guideway, is formed in a first, larger guiding body arranged in a first wide guideway, the construction height can be minimized, since it only constitutes a single guiding body height.
  • a second smaller guide body is formed on a first larger guide body and a second narrow guide path for the second guide body is formed in a first wide guide track for the second guide body, the strength of the first guide body is not reduced by a recess incorporated therein.
  • the guideway having parallel guide legs advantageously has a semicircular closure adjoining these parallel guide legs anteriorly and / or posteriorly. As a result, stop forces occur flat in the end position of the translation.
  • the termination can also be straight, ridge-like, polygonal or otherwise suitable.
  • means can be provided, e.g. a dovetail-like or undercut configuration of the interacting pairs of contact surfaces, or roofs arranged on the outside or similar suitable devices.
  • Figure 1 a first embodiment with a guide body in the
  • Figure 3 the first embodiment with the guide body in the
  • FIG. 4 a second exemplary embodiment with a guide body in the translation position inserted in a guide track and in the extension position
  • FIG. 5 the second exemplary embodiment with the guide body inserted in the translation position in the guide track and in the flexion position
  • FIG. 6 the second exemplary embodiment according to FIG. 5, but with a shape variant of the boundary path
  • FIG. 7 a third exemplary embodiment with a guide body in the rotational position used in a guide track
  • FIG. 8 the third exemplary embodiment with the guide body in the translation position inserted in the guide track and in the extension position
  • FIG. 9 the third exemplary embodiment with the guide body inserted in the translation position in the guide track and in the flexion position
  • FIG. 10 a fourth exemplary embodiment with a guide body in the rotational position used in a guide track
  • FIG. 11 the fourth exemplary embodiment with the guide body inserted in the translation position in the guide track and in the extension position
  • FIG. 12 the fourth exemplary embodiment with the guide body inserted in the translation position in the guide path and in the flexion position
  • Figure 13 a fifth embodiment with a second guideway incorporated into a first guideway, the guide body being inserted in the flexion position of the translation position.
  • FIG. 14 the sixth embodiment with the guide body in the extension position
  • FIG. 15 a sixth exemplary embodiment with a guide body, the shape of which deviates from the circular shape,
  • FIG. 16 a seventh exemplary embodiment with a guide body deviating from the circular shape with a guide track incorporated therein,
  • FIG. 17 a view of an endoprosthesis with a guide track formed in the guide body
  • Figure 18 a view of an endoprosthesis with stepped one above the other
  • Figure 19 an eighth embodiment with the bearing part in the rotational position
  • Figure 20 a ninth embodiment with the bearing part in the rotational position
  • Figure 21 a tibia plateau in supervision, with a single guide pin
  • FIG. 23 a tibial plateau with an eccentric guide pin
  • FIG. 24 bearing part with two guides arranged side by side
  • FIGS. 25 and 26 tibial plateau and the associated bearing part of another
  • Embodiment Figures 27 and 28 Tibial plateau and bearing part with inserted in the bearing part
  • 16 and 17 show a first type of exemplary embodiment in which an outer guideway 13, 33 interacts with a large guiding body 21, 41 in which an inner guideway 33, 13 is recessed, which has a smaller one Guide body 41.21 cooperates.
  • Guideway is understood to mean a guide with mutually facing guide surfaces, by a guide body a guide with mutually facing guide surfaces.
  • a guide track 33, 13 is arranged within a guide body 41, 21, which is guided in a guide track 13, 33 that limits the relative movement between the bearing part and the tibial plateau 11.
  • One guideway is also referred to below as boundary path 13 because it limits the movement guided by the other guideway.
  • the limiting path 13 interacts with a guide body, which is accordingly called the limiting body 21 below.
  • anterior or ventral is shown at the bottom and posterior or dorsal at the top.
  • Figures 1 to 3 show a first embodiment.
  • a recess 17 forming a boundary path 13 is formed, which is circular and whose center coincides approximately with the center of the tibial plateau 11 and has a first radius 15.
  • a limiting body 21 is movably arranged within the limiting path 13 forming the edge of the depression 17.
  • This is horseshoe-shaped with a circular section with a second radius S as the outer contour surface 23, and a semicircle 27 with a third radius R and then two parallel legs 31 as the inner contour line.
  • the inner contour surface of the horseshoe-shaped limiting body 21 forms a guide track 33 for a guide body 41.
  • the guide body 41 has a circular outline.
  • the lateral surface 45 of the guide body 41 lies on a fourth radius 43, which corresponds to the third radius R of the guide track 33 with the tolerance required for sliding.
  • the guide body 41 is arranged in a stationary manner with respect to the boundary track 13 on the tibial plateau 11.
  • a bearing part 49 The outline of a bearing part 49 is shown elliptically and dotted.
  • This bearing part forms a meniscus part displaceably arranged on the tibial plateau 11, on the underside of which the limiting body 21 is arranged in a stationary manner.
  • the bearing shells interacting with the femoral condyles are formed on the upper side of the bearing part 49 or on this articulation body.
  • the limiting body 21 is inserted into the limiting path 13 in a first position. In this position, it can be rotated about the center 29 of the fourth radius 43 and, depending on the angle of rotation, can be displaced by a small amount parallel to the legs 31 up to the limiting path 13. In a region relevant to the rotation of the knee around the central position of the limiting body 21 shown in FIG. 1, this displacement is negligible.
  • the limiting body 21 is inserted into the limiting path 13 rotated by 180 degrees and consequently has a displaceability, the extent of which relative displacement the articulation surfaces of the natural knee involved in flexion and extension is simulated. This displacement is shown in FIGS. 2 and 3.
  • FIG. 1 is inserted into the limiting path 13 in a first position. In this position, it can be rotated about the center 29 of the fourth radius 43 and, depending on the angle of rotation, can be displaced by a small amount parallel to the legs 31 up to the limiting path 13. In a region relevant to the rotation of the knee around the central position of the
  • FIG. 3 shows the position of the limiting body 21 in the limiting path 13 during flexion, in which a rotation about a rotation axis directed perpendicular to the tibia plateau 11 and passing through the center 29 of the fourth radius 43 is possible without hindrance.
  • FIG. 2 shows the position at extension in which rotation is prevented or is only possible together with a posterior translation.
  • the boundary path 13 and the outer contour surface 23 of the boundary body 21 form a first contact surface pair 51 which limits the movement, but which also acts as a leader during rotation.
  • the guide track 33 and the outer surface 45 of the guide body 41 form a second pair of contact surfaces 53 guiding the movement.
  • Figures 4 and 5 show a second embodiment.
  • a first pair of contact surfaces 51 is formed between the edge of the depression 17, which, as in the first exemplary embodiment, forms a boundary path 13, and the contour surface 23 of the boundary body 21.
  • the delimitation body 21 has a circular contour surface 23.
  • the delimitation path 13 is an oval with a longitudinal direction anterior-posterior. The oval is somewhat wider than the diameter of the limiting body 21.
  • An oval guideway 33 with parallel legs 31 is formed in the interior of the limiting body 21, in which a circular guiding body 41 with a diameter which corresponds to the width of the oval of the guideway 33 is arranged ,
  • the lateral surface 45 of the guide body 41 is formed concentrically with the posterior semicircle of the boundary path 13.
  • this design In addition to a translation of the limiting body 21 along its parallel legs 31, this design also enables it to rotate about the center of the guide body 41.
  • the limiting body 21 In the extended position of the knee (FIG. 4), the limiting body 21 is advanced anteriorly. If the boundary path 13 and the contour surface 23 of the first guide body 21 touch, practically no rotation is possible without simultaneous translation. As the distance between the contact surfaces 13, 23 of the first pair of contact surfaces 51 increases, the range of rotation of the limiting body 21 increases up to the width of the oval of the limiting path 13 in order to be unlimited in the flexion position (FIG. 5). However, if the bearing part 49 and thus the limiting body 21 are inserted into the recess 17 in a position rotated by 180 degrees (not shown), only rotation is possible and translation by the two pairs of contact surfaces 51, 53 is prevented.
  • FIG. 6 shows a variant of the second exemplary embodiment, in which, however, the boundary track 13 is bulged laterally to create more space for the translation of the boundary body 21 in the rotational position, and has anterior and posterior circular sections 65 that correspond to the radius S of the contour surface 23 of the Boundary body 21 correspond in order to allow a flat contact of the boundary body in the two extreme positions.
  • FIGS. 7 to 9 A third exemplary embodiment is shown schematically in FIGS. 7 to 9.
  • FIG. 7 shows the use position, which only allows rotation
  • FIG. 8 the function type translation and rotation in the extension position
  • FIG. 9 the same, but in the flexion position.
  • a recess 17 is also incorporated, the edge of which, however, does not form a boundary track but a guide track 33.
  • the function of this guideway 33 corresponds to that of the guideway 33 in the first and second exemplary embodiments.
  • a circular delimitation body 21 is arranged in a fixed position in the recess 17.
  • a guide body 41 is movably arranged in the guide track 33 and around the limiting body 21.
  • a limiting path 13 cooperating with the limiting body 21 is formed in this.
  • the function of this boundary path 13 corresponds to that of the boundary path 13 in the first exemplary embodiment.
  • the limiting body 21 is arranged in a stationary manner on the tibial plateau 11, while the guiding body 41 cooperating with the guideway 33 is displaceably mounted.
  • a first pair of contact surfaces 51 consisting of the boundary track 13 and a surface area 23 of the interacting with it delimits Limiting body 21 the freedom of movement of the bearing part 49 on the tibial plateau 11, while a second pair of contact surfaces 53, consisting of the guide track 33 and the lateral surface 45 of the first guide body 41, guides the movement.
  • the guideway 33 has two parallel legs 31, and the guide body 41 has two opposite circular sections, which cooperate with the parallel legs 31 and lie on a circle with a diameter corresponding to the distance between the legs 31.
  • the recess 17, the edge of which forms the guideway 33 is worked into the tibial plateau 11 from anterior.
  • the edge of the depression 17 forming the guideway 33 has a semicircle 27 with a radius R dorsally, to which two parallel legs 31 then extend.
  • the outer surface 45 of the guide body 41 cooperating with the guide track 33 has a radius corresponding to the radius R of the guide track 33.
  • An oval limiting path 13 is incorporated in the guide body 41, within which the stationary limiting body 21 is arranged.
  • the limiting path 13 could also be circular, for a limitation of the movement of the guide body 41 based on the first exemplary embodiment.
  • the degree of rotation in the almost extension position (FIG. 8) is less than in the case of a circular design of the boundary track 13.
  • the boundary surface of the boundary track 13 can, however, also have other shapes, as is shown with the aid of other exemplary embodiments.
  • FIGS. 10 to 12 show, as a fourth exemplary embodiment, a kind of reversal of the third exemplary embodiment, in which the depression 17 is open towards the posterior.
  • An advantage of this is the large contact surface arranged anteriorly between the guide body 41 and the guide track 33, which minimizes the surface pressure which is generated by the large thrust forces acting from posterior to anterior, for example when walking up stairs. Since with the simple reversal of the In the third exemplary embodiment, there is no limitation of the rotation in the extension position, but would be present in the flexion position, this limitation is solved differently in the fourth exemplary embodiment.
  • the guide body 41 has an extension 61 projecting beyond the circle radius. A recess 63 corresponding to the extension 61 is provided posteriorly in the guideway 33.
  • the extension and recess can make up part of the depth of the depression 17 or take up the entire depth.
  • the extension 61 In the use position, which only allows rotation, according to FIG. 10, the extension 61 is directed posteriorly and does not hinder the rotation in the area essential for the knee function.
  • the operating position which permits translation and rotation, according to FIGS. 11 and 12, with the knee flexed and the guide body 41 displaced dorsally (FIG. 11), the rotation is not impeded by the extension 61, but by the limiting body 21 and the limiting path 13 inside of the guide body 41 limited.
  • the extension position In the extension position (FIG. 12), on the other hand, the extension 61 engages in the recess 63 and prevents rotation that would otherwise be possible around the delimiting body 21 which is arranged around the circular and concentric to the semicircle of the guideway 33.
  • FIGS. 13 and 14 An advantageous fifth exemplary embodiment is shown in FIGS. 13 and 14.
  • the limiting body 21 is arranged in a stationary manner on the guide body 41.
  • a bore 27 is provided, the cylindrical wall of which forms a boundary track 13 which interacts with the contour surface 23 of the boundary body 21 which is "fish-blown" in one section.
  • the radii of the "fish bubble" and bore 27 correspond to each other.
  • the guide body 41 is circular with a diameter that corresponds to the width of the oval guide track 33 and is guided in the guide track 33.
  • a flexion position FIG. 13
  • the delimiting body 21 and the guiding body 41 are arranged posteriorly and touch the delimiting path 13 or the guiding path 33 posteriorly.
  • the contour surface 23 of the delimitation body 21 that is present anteriorly on the delimitation surface 13 prevents translation in the anterior direction.
  • FIGS. 15 and 16 show a sixth and seventh exemplary embodiment. These prove that the boundary path 13 does not have to have circular shapes. The desired functions can still be reached.
  • FIG. 15 which shows the first position of use for translation and rotation, a depression 17 is embedded in the tibial plateau 11 with two rectilinear edges which converge from posterior to anterior and serve as a delimitation path 13.
  • this recess 17 an elongated hole 27 is made, in which a circular guide body 41 is guided.
  • a delimitation body 21 This is arranged on a delimitation body 21, the contour surface 23 of which has circular sections 71 which are concentric with the lateral surface 45 of the guide body 41 in order to allow rotation, and in some cases has straight-line sections 73 which, in an extension position, touch the delimitation track 33 flatly.
  • the guide body 41 together with the limiting body 21 is inserted rotated by 180 degrees, then the circular section 71 of the limiting body 21 touches the limiting path 13 and the guide body 41 is in contact with the guide path 33 posteriorly, so that only rotation is possible.
  • the guide body 41 is arranged within a guide track 33 formed in the limiting body 21 and stationary in the recess 17.
  • the circular section 71 of the contour surface 23 is arranged concentrically to the semicircle of the oval guideway 33 in the limiting body 21.
  • FIGS. 1-12 and 16 show two basic configurations of the tibial plateau 11 and the bearing part 49.
  • Figure 17 corresponds in principle to a front view of the exemplary embodiments of FIGS. 1-12 and 16, in which a guide body 41 is arranged in a fixed manner in the tibia plateau in the depression 17, while the limiting body 21 has a recess 75 on the underside of the bearing part 49 Edge forms the guideway 33 and receives the guide body 41.
  • the reversal of the boundary path 13 and guideway 33 is also possible here.
  • the guideway and guide body are dovetail-shaped to prevent the bearing part from lifting off the tibia part.
  • bearing shells 85 are embedded on the upper side, which articulate with the condylar skids 83 of the femoral joint part 84.
  • FIG. 18 essentially corresponds to a front view of the exemplary embodiments from FIGS. 13-15, in which a bore 27 is made in the recess 17 receiving the guide body 41, which receives the limiting body 21 which is arranged in a stationary manner on the guide body 41.
  • the boundary track 13 can also be formed by the edge of the depression 17, the guide track 33 then being formed by the edge of the bore 27.
  • FIG. 18 also shows that the bearing shells 85 for receiving the condylar skids 83 can be formed in separate articulation bodies 81. These articulation bodies are then let into the bearing part 49 and are not displaceable relative to the latter. In order to prevent the bearing part from lifting off, hook-shaped projections 19 of the tibial plateau 11 grip the lateral edge of the bearing part 49 on the left and right.
  • FIG. 19 shows an eighth exemplary embodiment in which the bearing part 49 is designed in the form of glasses and a web 91 with two concentric edges connects the two bearing shells 85 around a circular guide body 41.
  • the inner concave circular path is part of the guideway 33 with two parallel legs 31.
  • the outer convex circular path forms the boundary path 13, which together with a peg-like boundary body 21, which can also have a different shape, prevents displacement in the dorsal direction and rotation limited by end stops 93.
  • FIG. 20 shows a ninth exemplary embodiment which likewise has both a guide track 33 and a limiting track 13 on the bearing part 49, which each cooperate with a guide body 41 or limiting body 21 protruding like a pin from the tibial plateau 11. While the limiting body 21 is arranged dorsally in the ninth embodiment, it is arranged ventrally in the tenth.
  • Both the eighth and the ninth exemplary embodiment have the advantage that the tibial plateau 11 has no depression 17, which simplifies production, since the guide body 41 and the limiting body 21 can be inserted subsequently.
  • the bearing part can be used in an operating position rotated by 180 degrees. In contrast to the illustration, translation is possible.
  • a tibial plateau 11 with two matching bearing parts 49 is shown schematically in FIGS. 21, 22 and 24.
  • the tibial plateau 11 has a cylindrical, circular guide pin 41 which fits from below into a guide 33.95 in the bearing part 49.
  • two different guides 33, 95 are arranged one behind the other.
  • the rear guide 95 has a concave circular path, which encompasses an angular range of well over 180 degrees and thus forms a rotational guide together with the guide pin.
  • the front guide 33 has a translation guide with two parallel guide legs 31.
  • the guide pin 41 can either be engaged with the rear guide 95 to inhibit translation, or it can be engaged with the front guide 33 to allow translation.
  • the guides 33.95 are on a central axis of the bearing part 49.
  • the guides are arranged side by side on one side of the central axis.
  • the guideway 33 does not necessarily have to run parallel to the central axis, but can also converge towards it, and one of the guides can also be arranged on the central axis.
  • a tibial plateau 11 with an eccentrically arranged guide pin 41 is shown in FIG. This is advantageous if the bearing part of FIG. 24 is in two mirror-image versions with respect to the arrangement of the guides.
  • the function type (rotation and translation, or only rotation) can then be selected with the corresponding mirror-image bearing part.
  • FIGS. 25 and 26 show a further exemplary embodiment with a tibia plateau 11 and a bearing part 49 to be arranged thereon.
  • the two guides 33, 101 in the bearing part 49 are arranged one inside the other.
  • two different guides are also provided on the tibia plateau 11 for the two function types.
  • a guide body 41 with a circular, cylindrical shape there is a bore 99 which can cooperate with a pin 101 in the bearing part.
  • the pin 101 is arranged within the guideway 33 in the bearing part 49. In one insert control, the pin 101 engages in the bore 99 and thus prevents the translational movement, while together with the bore 99 it guides the rotational movement.
  • the other insert control it is arranged dorsally of the guide body 41 and limits the translational movement.
  • the bore 99 is not arranged centrally in the guide body 41, but is offset to the rear.
  • FIGS. 27 and 28 A final exemplary embodiment is shown in FIGS. 27 and 28.
  • a strong guide pin 41 is arranged on the tibia plateau 11.
  • the storage section 49 is a guide track 33 with two paraUelen guide legs 31 and two semicircular terminations excluded.
  • the guide pin 41 is translationally displaceable. So that this translation can be prevented, a limiting part 103, on which the limiting path 13 is arranged, can be inserted into the bearing part 49 or into the translation guide 33. This shortens the guideway 33 to a circular rotation guide 95.

Landscapes

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

Abstract

Selon l'invention, deux glissières de guidage (13, 33) coopérant chacune avec un corps de guidage (21, 41) pour guider un mouvement de glissement entre un plateau tibial (11) et une plaque intermédiaire (49) placée sur ce plateau permettent une insertion de la pièce d'appui (49) dans deux positions d'insertion dans le plateau tibial (11). Dans une première position d'insertion (fig. 2) destinée à une articulation de genou présentant des ligaments croisés intacts, les glissières de guidage (13, 33) et les corps de guidage (21, 41) permettent aussi bien un mouvement de translation que de rotation de la pièce d'appui (49) sur le plateau tibial (11), tandis que dans une seconde position d'insertion (fig. 1) destinée à une articulation de genou présentant des ligaments croisés endommagés, seule une rotation de la pièce d'appui (49) est possible.
EP02754103A 2001-09-28 2002-09-03 Endoprothese pour l'articulation du genou Withdrawn EP1432365A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH17852001 2001-09-28
CH17852001 2001-09-28
PCT/CH2002/000483 WO2003028586A2 (fr) 2001-09-28 2002-09-03 Endoprothese pour l'articulation du genou

Publications (1)

Publication Number Publication Date
EP1432365A2 true EP1432365A2 (fr) 2004-06-30

Family

ID=4566271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02754103A Withdrawn EP1432365A2 (fr) 2001-09-28 2002-09-03 Endoprothese pour l'articulation du genou

Country Status (2)

Country Link
EP (1) EP1432365A2 (fr)
WO (1) WO2003028586A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008017394B4 (de) 2008-04-05 2010-05-06 Aesculap Ag Knieendoprothese
DE102011001840A1 (de) * 2011-04-06 2012-10-11 Aesculap Ag Kniegelenkendoprothesensystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ243181A (en) * 1992-04-23 1994-10-26 Michael John Pappas Prosthetic joint with guide means to limit articulation of a first element and bearing means to two degrees of freedom
US6123728A (en) * 1997-09-17 2000-09-26 Smith & Nephew, Inc. Mobile bearing knee prosthesis
AU771796B2 (en) * 1999-02-03 2004-04-01 Depuy Orthopaedics, Inc. Modular joint prosthesis system
EP1086667B1 (fr) * 1999-09-24 2004-08-04 Centerpulse Orthopedics Ltd. Pièce tibiale pour prothèse du genou et ensemble modulaire la comprenant

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03028586A3 *

Also Published As

Publication number Publication date
WO2003028586A3 (fr) 2003-11-20
WO2003028586A2 (fr) 2003-04-10

Similar Documents

Publication Publication Date Title
EP0913132B1 (fr) Prothèse de genou
DE69922723T2 (de) Knieprothese mit vier Gelenkflächen
DE2802655C2 (de) Kniegelenkendoprothese
DE60023953T2 (de) Kniegelenkprothese mit beweglichem lager und fixiertem tibialen stamm
DE69825537T2 (de) Gelenkprothese mit kontrollierter Drehbewegung
DE102005009496B4 (de) Kniegelenk-Endoprothese mit Zwischenelement mit unterschiedlich gestalteten Gleitflächen
DE68915175T2 (de) Knieprothese.
DE2906458C2 (de) Kniegelenkendoprothese
DE68906082T2 (de) Gleitprothese für das Knie.
EP2475333B1 (fr) Endoprothèse de l'articulation du genou
DE19647155C2 (de) Implantat
EP2438889B1 (fr) Prothèse d'articulation du genou
DE69938330T2 (de) Tibiale Knieprothese mit doppeltem Einsatz
DE102007032150B4 (de) Künstliches Meniskusteil und Kniegelenkprothese
DE4141757C1 (fr)
DE2304988A1 (de) Kniegelenkprothese
EP0672397A1 (fr) Plateau tibial pour l'articulation artificielle de genou
EP0194326B1 (fr) Endoprothèse de l'articulation du genou
DE69220779T2 (de) "Rückwärtig stabilisierte Knie-Gesamtprothese"
DE19529824A1 (de) Bikondyläre Knie-Endoprothese
EP0551792A1 (fr) Plate-forme ménisque pour articulation artificielle du genou
EP2345391B1 (fr) Prothèse d'articulation du genou
EP0682925B1 (fr) Prothèse d'articulation, en particulier du genou
DE202009012704U1 (de) Kniegelenkendoprothese
EP1432365A2 (fr) Endoprothese pour l'articulation du genou

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040426

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110401