DE3885997T2 - Anpassbare Hüftprothese. - Google Patents

Anpassbare Hüftprothese.

Info

Publication number
DE3885997T2
DE3885997T2 DE88830304T DE3885997T DE3885997T2 DE 3885997 T2 DE3885997 T2 DE 3885997T2 DE 88830304 T DE88830304 T DE 88830304T DE 3885997 T DE3885997 T DE 3885997T DE 3885997 T2 DE3885997 T2 DE 3885997T2
Authority
DE
Germany
Prior art keywords
seat
neck
stem
hip prosthesis
neck part
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 - Lifetime
Application number
DE88830304T
Other languages
English (en)
Other versions
DE3885997D1 (de
Inventor
Patrizio Cremascoli
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.)
Wright Medical Italy SRL
Original Assignee
CREMASCOLI SpA G
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=11139255&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3885997(T2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by CREMASCOLI SpA G filed Critical CREMASCOLI SpA G
Publication of DE3885997D1 publication Critical patent/DE3885997D1/de
Application granted granted Critical
Publication of DE3885997T2 publication Critical patent/DE3885997T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A61F2/32Joints for the hip
    • A61F2/36Femoral heads ; Femoral endoprostheses
    • A61F2/3662Femoral shafts
    • 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
    • A61F2/32Joints for the hip
    • A61F2/36Femoral heads ; Femoral endoprostheses
    • A61F2/3609Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • 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
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    • 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
    • A61F2/30Joints
    • A61F2/32Joints for the hip
    • A61F2/36Femoral heads ; Femoral endoprostheses
    • A61F2/3662Femoral shafts
    • A61F2/367Proximal or metaphyseal parts of shafts
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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
    • AHUMAN NECESSITIES
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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
    • A61F2002/30332Conically- or frustoconically-shaped protrusion and recess
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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
    • A61F2002/30332Conically- or frustoconically-shaped protrusion and recess
    • A61F2002/30339Double cones, i.e. connecting element having two conical connections, one at each of its opposite ends
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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
    • 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
    • A61F2002/30331Connections 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
    • 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
    • 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
    • A61F2002/30331Connections 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
    • A61F2002/30355Cylinder of elliptical or oval basis
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    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
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    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30538Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
    • A61F2002/3054Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
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    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537Special structural features of bone or joint prostheses not otherwise provided for adjustable
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    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
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    • 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
    • A61F2/32Joints for the hip
    • A61F2/36Femoral heads ; Femoral endoprostheses
    • A61F2/3609Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625Necks
    • A61F2002/3631Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
    • 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
    • A61F2/32Joints for the hip
    • A61F2/36Femoral heads ; Femoral endoprostheses
    • A61F2/3609Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3652Connections of necks to shafts
    • 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
    • A61F2/32Joints for the hip
    • A61F2/36Femoral heads ; Femoral endoprostheses
    • A61F2/3662Femoral shafts
    • A61F2002/3678Geometrical features
    • A61F2002/3686Geometrical features bent
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (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

    HINTERGRUND DER ERFINDUNG
  • Die vorliegende Erfindung betrifft den Aufbau einer Hüftprothese, die darauf ausgerichtet ist, der spezifischen Gestalt oder den geometrischen Eigenschaften der coxo- Oberschenkelknochen Gelenkverbindung des Patienten leicht eingepaßt zu werden.
  • Wie im Fall von Frakturen, Arthritis und dergleichen der menschlichen Hüfte oder ihrem mit dem Oberschenkelknochen verbundenen Gelenk bekannt ist, werden gegenwärtig geeignete Hüftprothesen verwendet, um das Hüftgelenk mit erneuerter Beweglichkeit zu versehen.
  • Die konventionellen Hüftprothesenaufbauten sind gewöhnlich als ein Stück gestaltet, bestehend aus einem Schaft vom Oberteil, von dem sich ein Halsstück erstreckt, auf dem ein kugelförmiger Kopf aufbracht ist, der jeden gewünschten Durchmesser besitzt.
  • Die so konstruierten Prothesen besitzen jedoch den Nachteil, daß sie nicht für alle Patienten verwendet werden können, wenn diese Prothesen nicht spezifisch in der Größe dem geometrischen Bau der Hüfte und des Oberschenkelknochens das Patienten angepaßt sind.
  • In der Tat können diese Prothesen, obwohl sie in befriedigender Weise für einen gegebenen Patienten zugeschnitten wurden, nicht an andere Patienten angepaßt werden, hauptsächlich weil ihre Halsstückteile größere oder kleinere Länge besitzen, als diejenige, die geeignet ist, eine passende coxo- Oberschenkelknochen Gelenkverbindung bereitzustellen.
  • In diesen Fällen kann, wie augenscheinlich sein sollte, der Prothesenkopf nicht passend in das Acetabulum des Patienten eingefügt werden, mit dem es zusammenarbeiten sollte.
  • Außerdem hat ein Patient manchmal einen sogenannten "varus" Oberschenkelknochen, das heißt, er besitzt eine ziemlich anormale Gestalt, und für diesen Oberschenkelknochen müssen besondere Hüftprothesen angepaßt werden, in denen das Halsteil eine spezifische vorgegebene Ausrichtung bezüglich des Schaftes besitzt.
  • In diesem Zusammenhang sollte außerdem herausgehoben werden, daß das Halsstück des Oberschenkelknochens nicht senkrecht zum Becken des Patienten ist, dabei ist ein normales Halsstück um ungefähr 10º bezüglich des Beckens gedreht.
  • Bekannte Hüftprothesen sind auf der anderen Seite nicht dafür gedacht, diesen Nachteil zu überwinden und sie können daher nicht perfekt den anatomischen Eigenschaften vieler Patienten angepaßt werden.
  • Das Patent EP-A-0257359, als Referenz, offenbart den Aufbau einer Hüftprothese, die im wesentlichen einen Schaft an einem Oberteil umfaßt, an dem Vorrichtungen bereitgestellt sind zum festen Koppeln eines Endes eines klein gestalteten Stabes oder Halsstücks, einen runden Kopf tragend, darauf ausgerichtet, mit dem Acetabulum des Beckens eines Patienten zu koppeln; dieser kleine Stab besitzt variable Länge und eine longitudinale Achse, die jede gewünschte Ausdehnung besitzt.
  • ZUSAMMENFASSUNG DER ERFINDUNG
  • Demgemäß besteht die Aufgabe der vorliegenden Erfindung darin, die vorstehend erwähnten Nachteile durch Bereitstellen einer Hüftprothese zu überwinden, die mit einem Halsstück jeder gewünschten Länge, gemäß den Erfordernissen, bereitgestellt werden kann.
  • Innerhalb des Bereiches des vorstehend erwähnten Gegenstandes ist ein Hauptgegenstand der vorliegenden Erfindung, eine solche Hüftprothese bereitzustellen, in der die Achse des Halsstücks in der Lage ist, bezüglich der Achse des Schaftes einen unterschiedlichen Öffnungswinkel zu bilden.
  • Noch ein anderer Gegenstand der vorliegenden Erfindung besteht darin, einen solchen Hüftprothesenaufbau bereitzustellen, in dem die Achse des Halsteils jede gewünschte Ausdehnung besitzt, eingeschlossen eine nicht gerade.
  • Gemäß einem Aspekt der vorliegenden Erfindung werden die vorstehend erwähnten Ziele und Gegenstände, wie auch bis jetzt andere Gegenstände, die nachstehend augenscheinlicher werden, durch eine Hüftprothese gemäß dem Hauptanspruch erreicht.
  • KURZE BESCHREIBUNG DER ZEICHNUNGEN
  • Weitere charakteristische Merkmale und Vorteile des Hüftprothesenaufbaus gemäß der vorliegenden Erfindung werden hierin nachstehend augenscheinlicher werden aus der folgenden detaillierten Beschreibung einer bevorzugten, wenn auch nicht exklusiven Ausführungsform davon, die durch ein indikatives Beispiel in den Abbildungen der beiliegenden Zeichnungen veranschaulicht ist, in denen:
  • Abbildung 1 eine Seitenansicht eines Hüftprothesenaufbaus gemäß der vorliegenden Erfindung ist;
  • Abbildung 2 eine Vorderansicht des Prothesenschaftes ist;
  • Abbildung 3 eine Querschnittsansicht ist, darstellend die Kopplung zwischen dem Schaft und dem Halsstück der Prothese;
  • Abbildung 4 eine mögliche Ausführungsform des Halsstücks der Prothese zeigt;
  • Abbildungen 5 bis 9 andere mögliche Ausführungsformen von Halsstücken zeigen, ausgerüstet, auf dem Prothesenschaft angebracht zu werden und unterschiedliche Ausdehnung der longitudinalen Achsen besitzend.
  • BESCHREIBUNG DER BEVORZUGTEN AUSFÜHRUNGSFORM
  • Bezüglich der vorstehenden Abbildungen der beiliegenden Zeichnungen umfaßt der Hüftprothesenaufbau gemäß der vorliegenden Erfindung im wesentlichen einen Schaft 1, bestehend aus einem flachen Stab, eine gegebene Länge besitzend und eine Oberfläche, versehen mit einer Vielzahl von longitudinalen Kerben 2.
  • Der Prothesenschaft erstreckt sich insbesondere gemäß einer passend gekrümmten longitudinalen Achse und besitzt an seinem unteren Ende 3 im wesentlichen Spitzkegelgestalt.
  • Der Schaft ist außerdem an seinem oberen Ende, mit einem Teil 4 geschaffen, vergrößert an der Seite seiner konkaven perimetrischen Begrenzung, auf der ein Sitz oder eine Aussparung gebildet ist, eine geeignet geneigte Achse besitzend, eine ovale Querschnittsfläche und geeignet verjüngt.
  • In diesem Sitz ist ein Ende 6, ebenso gestaltet einer kleinen Stange oder Halsstücks 7 fest untergebracht, das andere Ende davon, ist so gestaltet, daß es in der Lage ist, einen runden Kopf 9 zurückzuhalten, seinerseits zum Koppeln mit dem Acetabulum des Beckens des Patienten ausgerüstet.
  • In diesem Zusammenhang sollte herausgehoben werden, daß der erwähnte kleine Stab jede gewünschte variable Länge haben kann, abhängig von den spezifischen Verwendungsanforderungen.
  • Der erwähnte kleine Stab kann außerdem eine unterschiedlich geneigte Achse in Bezug auf sein Ende haben, das mit dem Sitz5 des Schaftes verbunden ist, und dessen Achse selbstverständlich mit der Achse dieses Sitzes zusammentrifft.
  • Diese Neigung kann im wesentlichen gemäß jeder der Ebenen erhalten werden, zu der Gesamtheit der Ebenen gehörend, die durch die Linie durchgehen, die die Achse dieses Sitzes festlegt.
  • Noch spezifischer, wie es in Abbildung 9 gezeigt ist, stellt eine Ausführungsform der vorliegenden Erfindung den Gebrauch eines Halsstückes bereit, einschließend ein Einfügungsende, das versetzt ist gegen seine axiale Ausdehnung.
  • So wird eine Prothese gebildet, einschließend ein Halsstück, das praktisch die Verlängerung einer mittleren Krümmung bildet, gezeigt bei 10, des Oberteils des Schaftes.
  • Diese Konfiguration bietet in der tatsächlichen Praxis die Möglichkeit, ein Halsstück einzufügen, auch in Prothesen geringster Dicke, wobei eine perfekte und reproduzierbare Positionierung des Schafthalsteils gesichert wird, ohne jede Risiken einer möglichen Lösung der zwei Teile.
  • Aus der vorstehenden Offenbarung sollte augenscheinlich sein, daß die Erfindung die beabsichtigten Gegenstände voll erreicht.

Claims (3)

1. Eine Hüftprothese, umfassend einen Schaft (1), an dessen Oberteil eine Aussparung (5) geschaffen ist, in die fest ein Endteil (6) eines Halsstücksteils (7, 23) verbunden werden kann, das andere Ende (8, 21) davon spitz zulaufend ist und verbindbar ist in eine passend spitz zulaufende Bohrung eines kugelförmigen Kopfes, angepaßt zum Koppeln mit dem Acetabulum des Beckens des Patienten, dieser Schaft (1) einschließend einen flachen Schaftstab, eine äußere Oberfläche besitzend, geschaffen mit einer Vielzahl von longitudinal sich erstreckenden Kerben (2), dieser Schaft (1) besitzend ein im wesentlichen spitzkegelförmiges Grundendteil (3), diese Aussparung (5) umfassend einne spitz zulaufenden Sitz (5) von ovalem Querschnitt und dieses Endteil (6) dieses Halsteils einen ovalen Querschnitt besitzend zum anliegenden Einpassen in diesen sich verjüngenden Sitz (5) von ovalem Querschnitt dieses Schaftes; im eingepaßten Zustand stimmt die Achse dieses Sitzes (5) im wesentlichen mit der Achse dieses einen Endteils (6) dieses Halsteils überein.
2. Eine Hüftprothese gemäß Anspruch 1, dadurch gekennzeichnet, daß dieses Halsteil (7) einen Stabhalsteilkörper umfaßt, einschließend einen zentralen Halsteil, integriert mit diesem einen Endteil (6) und diesem anderen Endteil (8) dieses Halsteils und dazwischen angebracht, dieses zentrale Halsteil und dieses andere Endteil (8) umfassend, da dieses Ende (6) dieses Halsteils (7) mit diesem Sitz (5) verbunden ist, eine gemeinsame Achse, die gegen die Achse dieses Sitzes (5) versetzt ist.
3. Eine Hüftprothese gemäß den Ansprüchen 1 und 2, dadurch charakterisiert, daß dieser Sitz (5) einen flachen elliptischen Querschnitt besitzt.
DE88830304T 1987-08-03 1988-07-19 Anpassbare Hüftprothese. Expired - Lifetime DE3885997T2 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT8712023A IT1213873B (it) 1987-08-03 1987-08-03 Struttura di protesi d'anca suscettibile di essere facilmente adattata alla particolare conformazione dell'articolazione coxo-femorale dei singoli pazienti

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DE3885997D1 DE3885997D1 (de) 1994-01-13
DE3885997T2 true DE3885997T2 (de) 1994-03-24

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EP (1) EP0310566B1 (de)
DE (1) DE3885997T2 (de)
IT (1) IT1213873B (de)

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IT1213873B (it) 1990-01-05
US4957510A (en) 1990-09-18
EP0310566A3 (en) 1989-12-20
IT8712023A0 (it) 1987-08-03
EP0310566B1 (de) 1993-12-01
EP0310566A2 (de) 1989-04-05
DE3885997D1 (de) 1994-01-13

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