DE7634751U1 - Kniegelenkprothese - Google Patents

Kniegelenkprothese

Info

Publication number
DE7634751U1
DE7634751U1 DE7634751U DE7634751U DE7634751U1 DE 7634751 U1 DE7634751 U1 DE 7634751U1 DE 7634751 U DE7634751 U DE 7634751U DE 7634751 U DE7634751 U DE 7634751U DE 7634751 U1 DE7634751 U1 DE 7634751U1
Authority
DE
Germany
Prior art keywords
joint prosthesis
prosthesis according
pin
knee joint
sliding
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.)
Expired
Application number
DE7634751U
Other languages
English (en)
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.)
Omar-Pacha Nabil Drdr 3470 Hoexter
Original Assignee
Omar-Pacha Nabil Drdr 3470 Hoexter
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 Omar-Pacha Nabil Drdr 3470 Hoexter filed Critical Omar-Pacha Nabil Drdr 3470 Hoexter
Priority to DE7634751U priority Critical patent/DE7634751U1/de
Publication of DE7634751U1 publication Critical patent/DE7634751U1/de
Expired legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/38Joints for elbows or knees
    • A61F2/3836Special connection between upper and lower leg, e.g. constrained
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/38Joints for elbows or knees
    • A61F2/3836Special connection between upper and lower leg, e.g. constrained
    • A61F2/384Special connection between upper and lower leg, e.g. constrained hinged, i.e. with transverse axle restricting the movement
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
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    • A61F2/3859Femoral components
    • AHUMAN NECESSITIES
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    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
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    • A61F2/3886Joints for elbows or knees for stabilising knees against anterior or lateral dislocations
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    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
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    • A61F2002/30331Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30354Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
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    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
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    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/30364Rotation about the common longitudinal axis
    • A61F2002/30367Rotation about the common longitudinal axis with additional means for preventing said rotation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30316The 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
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    • A61F2002/30331Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30362Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit with possibility of relative movement between the protrusion and the recess
    • A61F2002/3037Translation along the common longitudinal axis, e.g. piston
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30518Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements with possibility of relative movement between the prosthetic parts
    • A61F2002/3052Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements with possibility of relative movement between the prosthetic parts unrestrained in only one direction, e.g. moving unidirectionally
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878Special 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878Special 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
    • A61F2002/30879Ribs
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878Special 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
    • A61F2002/30879Ribs
    • A61F2002/30881Circumferential ribs, flanges or fins
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878Special 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
    • A61F2002/30891Plurality of protrusions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30767Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878Special 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
    • A61F2002/30891Plurality of protrusions
    • A61F2002/30892Plurality of protrusions parallel

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)

Description

Betr.: P 729/A/^rr. - Anmelder: Dr. Nabil Omar-Pacha
Brenkhauser Str. 5 7 34 7 Höxter
" Kniegelenkprothese "
Er irt bekannt, bei krankhaften Veränderungen des Kniegelenks, die einn Versteifung zur Folge haben, Kniegelenkprothesen zu implantieren. Die Verbesserung einer solchen Prothese liegt der Neuerung als Aufgabe zugrunde. Sie soll insbesondere alle anatomischen Funktionen unabhängig vom Bandapparat erfüllen. Ferner soll sie von geringem Materialaufwand und einfach zu implantieren sein.
Die Neuerung zur Lösung dieser Aufgabe ist durch einen in den Gelenkkopf des Oberschenkelknochens (Femur) eingesetzten Schiitton gekennzeichnet, der gleitend mit einer in de·' Gelenkkopf des Unterschonkelknochens eingelassenen Platte verbunden ist, wobei die Form des Schlittens im wesentlichen der Krümmung des Gelenkkopfes des Oberschenkelknochens angepaßt ist. Von Vorteil ist es hierbei, den Schlitten aus zwei durch einen Steg miteinander verbundene Kufen zu bilden und mit der Gleitplatte über einen Gleitstift zu verbinden, der in einem an der Gleitplatte befestigten Gl eitzylinder geführt ist. Zur Verbindung weist der Haltesteg zwei Halteösen auf, in welche der Gleitstift mit an seinem oberen Ende angeordneten Drehzapfen greift. Auch die Gleitplatte kann aus zwei über einen Steg miteinander verbundenen Einzelteilen bestehen. Der Verbindungssteg der Gleitplatte trägt dann den Gleitzylinder .
7634751 05.05.77
P 729/em - Grflcur.-Pacha: :
Durch geeignete K' ttel muß dafür gesorgt werden, 'laß eine zu starke Drehung der. Gleitstiftcs um reine Längsachse vermieden wircU Hierfür eignet Eich eine Längsnut am Gleitstift, in die eine im Gleitzylinder gehaltene Schraube als Führungselement greift. Di Lär.gsnut kann sich nach unter, zu erweitern, so '3eß die Drehbewegung dez Gleitstiftes im Gleitzylinder in Abhängigkeit von der Beinhaltung den nntürlirhen Verhältnissen angepaßt werden kann. Eine nach unten verlaufende Erweiterung der Gleitstiftnut ermöglicht in angewinkelter Haltung des Unterschenkels eine größere Drehbeweglichkeit als bei gestrecktem Unterschenkel. Statt einer Längsnut mit einem darin eingreifenden Stift oder einer Schraube, besteht die Möglichkeit, die Drehbeweglichkeit durch eine Abflachung am Umfang des Gleitstiftes in Verbindung mit einer Abflachung des Innenumfangs des Gleitzylinders zu begrenzen. Auch hierbei sind Unterschiede bei der Drehbewegung in Abhängigkeit von der Beinhaltung möglich, wenn die Abflachungen nach unten zu breiter werden, d.h., wenn die Abflachung am Gleitstift in Richtung auf sein unteres Ende eine Neigung in Richtung auf die Längsachse des Stiftes aufweist. Die Verwendung einer Schraube ermöglicht gleichzeitig eine Begrenzung der axialen Bewegung des Gleitstiftes.
Um einen guten Sitz des Schlittens am Gelenkkopf zu gewährleisten, sind an den Schlittenkufen Verankerungsstifte befestigt, die ggf. zusätzlich mit Haftrillen ausgestattet sind» Auch die dem Gelenkkopf zugewandte Seite des Schlittens kann zusätzlich mit Haftrillen zur Erhöhung der Haftfestigkeit ausgerüstet sein. Um einen Gegendruck beim Einschieben des Gleitstiftes in den Gleitzylinder zu vermeiden, kann eine den Stift vollständig durchsetzende Längs-* bohrung oder wenigstens eine Längsnut vorgesehen werden»
P 7 29 /em - Omar-Pacha.
In der Zeichnung ist ein Αν. sfuhrunqsbeispiel der Neuerung schematisch dargestellt und erläutert. Es zeigen:
Fig. 1 einen Vertikalschnitt durch eine Prothese,
Fig. 2 den Schnitt B-B durch die Prothese gemäß Fig. 1,
Fig. 3 eine Draufsicht auf die Prothese,
Fig. 4 den Schnitt C-C durch den
Gleitzylinder und die Gleithülse,
Fig. 5 einen Querschnitt durch Gleit-
rtift und Gleitzylinder in' einer anderen Ausführungsform, und
Fig. 6 ein Diagramm über die vertikale Verschiebung des Drehzapfens bei verschiedenen Sch littenStellungen
Die der Form der Gelenkköpfe (Condylus-Medialis und Condylus-Lateraliε) angepaßton Schlittenkufen 1 sind auf der Oberfläche einer geteilten Gleitplatte abgestützt. Die beiden Schlittenkufen 1 sind über einen Verbindung?ε ten 11 miteinander verbunden. Der Steo hat eine rrittli re Öffnung, Mo vor. zwei Seiton durch Halteösen 6 für einen ~y lindr 1 r ?hen Gleitstift. 5 eingefaßt ist. Mit Drehzapf c r, A irt ier Gleitstill in entsprechenden Augen der Hciltoören 6 geÜHgert. Der Gleit— stift 3 ist mit seiner größeren Lan7^ in einem Gleitzylinder 5 verschiebbar goführt.
7634751 05.05.77
P 7 29/em ~
An vijT Innenseite der Gleitkufen 1 sind Ankerstifte 7 von keilförmiger Ausgestaltung angeordnet, die zur Verankerung in den Oberschenkelknochen greifen. Zur besseren Haftung sind Haftrillen 7a vorgesehen. Die innere Oberfläche des Schlittens kann zusätzlich mit Haftrililen la versehen sein. Dadurch wird ein höchstmöglichst verschiebefreier Sitz des Schlittens am Oberschenkelknochen gewährleistet. Der Gleitzylinder 5 ist an dem Verbindungssteg der beiden Gleitplattenteile ? befestigt. Zur Begrenzung der Verdrehung des Stiftes um seine Längsachse ist er mit einer Rotationsbegrenzungsnut 9 ausgeführt, j η die eine durch die Zylinderwand hindurchgreifende Begronzungsschraube reicht. Zur Gewährleistung einer naturgemäßen Drehmöglichkeit des Unterschenkels ist die Rotationsbegrenzungsnut 9 nach unten zu sich erweiternd ausgebildet, so daß der Unterschenkel in gestrecktem Zustand keine Drehbewegung um seine Längsachse ausführen kann, während dies bei einer angewinkelten Haltung durch Eingreifen der Schraube 3 in den unteren Teil der Nut 9 möglich ist. Alternativ hierzu besteht die Möglichkeit, wie in Fig. 5 gezeigt, sowohl den Innenumfang des Gleitzy]inders 5 mit einer Abflachung 12 als auch den Gleitstift 3 mit einer Abflachung zu versehen, die sich in Richtung auf das untere Ende hin verbreitern kann. Kit 3a ist die-' den Gleitstift völlig durchsetzende Entlüftungsbohrung bezeichnet.
Wie in Fig. 6 veranschaulicht, wandert der Drehpunkt, der in der Achse des Drehzapfens 4 liegt, beim Anwinkeln des Kniegelenks und des damit verbundene·". Gleitens des Schlittens auf der Gleitplatte 2 vertikal nach oben. Die Ausgangsstellung ist mit a bezeichnet,
7634751 05.05.77
P 729/em - Opiar<~Pacha /
p. 5 -,
wahrend die zwei weiteren Drehpunktpositionen mit fo und c bezeichnet sind. Die Verschiebung des Drehpunkts senkrecht nach oben erfolgt zwangsläufig durch die unterschiedlichen Krümmungen des Schlittens, die stetig ineinander übergehen. DIo unterschiedlichen Krümmungen ergeben sich aus der For-π dpr, betreffenden Gelenkkopfes.
Zur Verdeutlichung r.ind in unterbrochener Strahlführung die Konturen der beteiligten Schenkelknochen und die Eeinurnri sr.e dargestellt. Hierbei bedeuten 20 den Oberschenkelknochen, 21 den Unterschenkelknochen, 22 den mittleren Gelenkkopf des Ober:rhenkelknochens, 23 den reitliehen Gelenkkopf des °bcrschenkelknochens 20 und 24 das am Unterschenkelknoch^n ansetzende Wadenbein.
Die neuerungsgemäß gestaltete Kniegelenkprothese ist universell einsetzbar, insbesondere bei arthrotischen Veränderungen des Gelenks unter Beteiligung des Handapparats und erfüllt alle anatomischen Funktionen, unabhängig von diesem. Sie benötigt wenig Material und ist einfach zu implantieren.
7634751 05.05.77

Claims (19)

|",S ΓΙ■■·"' 'Ml ' :■ rrPL.-r^i. . ■ !Kiujfj J)M3U- " ' · <;\'i>T Hrtnuc'ver, cien 9.Februar 1977 ^ ClIM11,, '■. ' !.MiVSTJIMU Betr.: P 729/A/em - Aktenzeichen: G 76 34 751.8 Anmelder : Dr. Nabil Omar-Pacha NEUE SCHUTSANSPRÜCHE
1. Kniegelenkprothese, dadurch gekennzeichnet, daß auf einer am Gelenkkopf des Unterschenkelknochens befestigbaren Platte (2) ein Schlitten (1) mit gekrümmten Kufen gleitbar angeordnet ist.
2. Kniegelenkprothese nach Anspruch 1, dadurch gekennzeichnet, daß der Schlitten (1) aus zwei durch einen Steg (11) miteinander verbundenen Kufen besteht und mit der Gleitplatte
(2) über einen Gleitstift (3) verbunden ist, der in einem an der Gleitplatte befestigten Gleitzylinder (5) geführt ist.
3. Kniegelenkprothese nach Anspruch 2, dadurch gekennzeichnet, daß der Verbindungssteg (11) Halteösen (6) aufweist, in welche der Gleitstift (3) mit Drehzapfen (4) greift.
4. Kniegelenkprothese nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Gleitplatte
(2) aus zwei über einen Steg (10) miteinander verbundenen Einzelteilen besteht.
5. Kniegelenkprothese nach Anspruch 4, dadurch gekennzeichnet, daß der Gleitzylinder (5) am Verbindungssteg (10) der Gleitplatte (2) befestigt ist.
6. Kniegelenkprothese nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Gleitstift
(3) und/oder der Gleitzylinder (5) mit Mitteln zur Begrenzung einer Drehung des Stiftes um seine Längsachse versehen sind.
7. Kniegelenkprothese nach Anspruch 6, dadurch gekennzeichnet, daß der Gleitstift (3) mit einer Längsnut (9) versehen ist, in welche ein im Gleitzylinder (5) gehaltenes Führungselement greift.
7634751 05.05.77
Γ 7-9/scli - Oiiinr-Pncliu,
8. Kn:l.egelenkprothese nach Anspruch 7» dadurch gekennzeichnet, daß dar· FUhri.iiigse.luiiioirfc als Schraube (ü) ausfB» bildet ist.
9. Kniοgelenkprothese nach einem oder mehreren dor Ansprüche 7 his 8> dadurch, gekennzeichno t, daß sioh die Längsnut (9) nach unten zu erweitort,
10. Knie ge Ie nkpro the sr? nach einem oder mehreren dear Ansprüche 1 bis 6, dadurch gekennzeichnet, daß sowohl dor Gleitstift (3) ,als auch der Gleitzylinder (5) eine sich in Längsrichtung erstreckende Abflachung (.12, 13) aufweisen.
11. Kniegelenkprothese nach Anspruch 10, dadurch gekennzeichnet, daß die Breite der Abflachungeri nach unten zunehinend ausgebildet ist.
12. Kniegelenkprothese nach einem oder mehreren der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß der· Schlitten an seiner der Platte (2) abgewandten Seite mit wenigstens einem Verankerungsstift (7) ausgerüstet ist.
13· Kniogi1 lenkprothese nach Anspruch 12, dadurch gekennzeichnet, daß der Ankerstift (7) mit Haftrillen (7a) ausgestattet ist.
1-1. Kniogolonkprothese nach einem oder mehreren der Ansprüche 1 bis 13 f dadurch gekennzeichnet, daß die der Platte (2) abgowandte Schiit teuflache mit Haftrillen (la) versehen ist.
Ij. Kniegelcnkprothosc nach einem oder mehreren der Ansprüche 1 bis l'i , dadurch gekonnzei chnet, daß der Gleitstift (13) mit Mitteln zum Druckausgleich ausgestattet ist.
l6, Krij egelenkprothese nach Anspruch 15» dadurch gekennzeichnet, dafl der Gleitstift (3) mit einer axial gerichteten Durchgangsbohrung (3*0 versehen ist0
7634751 05.05.77
P 729/sch - Omar-Pacl-ifx
17. Kniegelenkprothese nach Anspruch 15> dadurch gekennzeichnet, daß der Gleitstift (3) mit wenigstens einer seitlich angeordneten, sich über die volle Stiftlänge erstreckenden Nut versehen ist.
18. linie gelenkprothese nach einem oder mehreren der Ansprüche 1 bis 17> dadurch gekennzeichnet, daß der Schlitten (l) aus Metall besteht.
19. Kniegelenkprothese nach einem oder mehreren der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß die Gleitplatte (2) aus Polyester gefertigt ist.
DE7634751U 1976-11-02 1976-11-02 Kniegelenkprothese Expired DE7634751U1 (de)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2810748A1 (de) * 1977-05-09 1978-11-23 Hauni Werke Koerber & Co Kg Kuenstliches gelenk fuer gliedmassen
DE4002424A1 (de) * 1989-07-26 1991-02-07 Orthoplant Endoprothetik Kniegelenk-endoprothese
FR2664492A1 (fr) * 1990-07-11 1992-01-17 Bousquet Gilles Prothese bicondylienne du genou.
FR2712180A1 (fr) * 1993-11-10 1995-05-19 Jbs Sa Prothèse de doigt à pistons.
DE19626438A1 (de) * 1996-06-19 1998-01-08 Implantcast Feinguss Gmbh Kniegelenkprothese

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2810748A1 (de) * 1977-05-09 1978-11-23 Hauni Werke Koerber & Co Kg Kuenstliches gelenk fuer gliedmassen
DE4002424A1 (de) * 1989-07-26 1991-02-07 Orthoplant Endoprothetik Kniegelenk-endoprothese
FR2664492A1 (fr) * 1990-07-11 1992-01-17 Bousquet Gilles Prothese bicondylienne du genou.
EP0472475A2 (de) * 1990-07-11 1992-02-26 Gilles Bousquet Bikondyläre Knieprothese
EP0472475A3 (de) * 1990-07-11 1992-03-11 Gilles Bousquet Bikondyläre Knieprothese
FR2712180A1 (fr) * 1993-11-10 1995-05-19 Jbs Sa Prothèse de doigt à pistons.
US5522903A (en) * 1993-11-10 1996-06-04 Jbs S.A. Finger prosthesis
DE19626438A1 (de) * 1996-06-19 1998-01-08 Implantcast Feinguss Gmbh Kniegelenkprothese
DE19626438B4 (de) * 1996-06-19 2007-03-22 Implantcast Gmbh Kniegelenkprothese

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