DE2331728A1 - Hip joint prosthesis - given angle between plane of collar and long axis of femur - Google Patents

Hip joint prosthesis - given angle between plane of collar and long axis of femur

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Publication number
DE2331728A1
DE2331728A1 DE19732331728 DE2331728A DE2331728A1 DE 2331728 A1 DE2331728 A1 DE 2331728A1 DE 19732331728 DE19732331728 DE 19732331728 DE 2331728 A DE2331728 A DE 2331728A DE 2331728 A1 DE2331728 A1 DE 2331728A1
Authority
DE
Germany
Prior art keywords
prosthesis
hip joint
collar
femur
shaft
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.)
Pending
Application number
DE19732331728
Other languages
German (de)
Inventor
Adolf Dr Rer Nat Gruenert
Gebhard Dr Med Ritter
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
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE19732331728 priority Critical patent/DE2331728A1/en
Publication of DE2331728A1 publication Critical patent/DE2331728A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • 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
    • A61F2002/30159—Concave polygonal shapes
    • A61F2002/30166—H-shaped or I-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
    • A61F2002/30316—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
    • A61F2002/30563—Special structural features of bone or joint prostheses not otherwise provided for having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3082—Grooves
    • A61F2002/30827—Plurality of grooves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2002/3678—Geometrical features
    • A61F2002/3686—Geometrical features bent
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
    • 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
    • A61F2230/0028—Shapes in the form of latin or greek characters

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)

Abstract

The angle between the plane of the collar and the longitudinal axis is 55-65 deg. Preferably the prosthesis shaft has a cross sectional shape such that the radii of curvature of the inner femur zone and the shaft section adjacent this zone are equalised as far as possible. The prosthesis shaft has two opposed longitudinal grooves. The prosthesis collar is attached to the femur additionally by a tension strap running on the femur. Anchoring difficulties are overcome and the hip joint prosthesis is suitable for permanent implantation and function.

Description

DIP L.-IN G. RUDOLF S. KODR ON-PATENTANWALTDIP L.-IN G. RUDOLF S. KODR ON-PATENT ADVOCATE

CS MAINZ/RHEIN, ADAM-KARItILLON-STRASSI *βCS MAINZ / RHEIN, ADAM-KARItILLON-STRASSI * β

20. Juni 1973 lfd. Nr. 73 172June 20, 1973 No. 73 172

PatentanmeldungPatent application

der Herren Dremed. Gebhard Ritter und Dr. rer.nat. Adolf Grünert, Mainz-Bretzenheifflof Messrs. Dremed. Gebhard Ritter and Dr. rer.nat. Adolf Grünert, Mainz-Bretzenheiffl

Hüftgelenkprothese mit Kugel, Prothesenkragen und SchaftHip joint prosthesis with ball, prosthetic collar and shaft

Die Erfindung betrifft eine Hüftgelenkprothese mit Kugel, Prothesenkragen und Schaft, die zur Verankerung im Oberschenkelknochen als dauerhafter Gelenkersatz bestimmt ist.The invention relates to a hip joint prosthesis with a ball, Prosthetic collar and shaft, which is intended for anchoring in the thigh bone as a permanent joint replacement.

Die Verankerung einer Hüftgelenkprothese sollte naturgemäß so dauerhaft wie möglich sein und sich mindestens auf die Lebenszeit des Patienten erstrecken. Leider hat die Verwendung der bekannten Hüftgelenkprothesen gezeigt, daß oftmals nach einem halben bis zweieinhalb Jahren nach der Implantation Lockerungen und Brücke der Hüftgelenkprothese eingetreten sind. Der danach notwendige Zweiteingriff mit Prothesenwechsel ist mit noch viel größeren Schwierigkeiten und Risiken belastet, das Dauerergebnis noch unsicherer.The anchoring of a hip joint prosthesis should be natural be as permanent as possible and extend at least for the life of the patient. Unfortunately, the use the known hip joint prostheses shown that often after half a year to two and a half years after the Implantation looseness and bridge of the hip joint prosthesis have occurred. The then necessary second intervention with Changing the prosthesis is with much greater difficulty and risks burdened, the long-term result even more uncertain.

Der Erfindung liegt die Aufgabe zugrunde, die festgestellten Schwierigkeiten zu vermeiden und eine Hüftgelenkprothese vorzuschlagen, die für eine dauerhafte Implantation und Funktionsfähigkeit geeignet ist.The invention is based on the object of avoiding the difficulties identified and a hip joint prosthesis propose which is suitable for permanent implantation and functionality.

409883/0096409883/0096

Gelöst wird diese Aufgabe nach der Erfindung dadurch, daß zwischen der Ebene des Prothesenkragens und der Längsachse des Oberschenkelknochens etwa ein Winkel alpha von 55 bis 6$ eingeschlossen ist·This object is achieved according to the invention in that approximately an angle alpha of 55 to 6 $ is included between the plane of the prosthesis collar and the longitudinal axis of the thigh bone.

Ferner empfiehlt es sich, dem Prothesenschaft eine solche Querschnittsform zu geben, daß die Krümmungsradien der inneren Oberschenkelknochenzonge und des dieser Zone benachbarten Schaftabschnitts so weit wie möglich einander angeglichen sind.It is also recommended that the prosthesis socket to give such a cross-sectional shape that the radii of curvature of the inner femur and the shaft section adjacent to this zone are aligned with one another as much as possible are.

Der Prothesenschaft kann zweckmäßig zwei gegenüberliegend angeordnete Längsnuten aufweisen·The prosthesis shaft can expediently have two opposite one another have arranged longitudinal grooves

Eine abgewandelte Ausführungsform der vorgeschlagenen Hüftgelenkprothese kann sich durch einen zusätzlichen auf der Aussenseite des Oberschenkelknochens verlaufenden Zuggurt kennzeichnen, der an seinem einen Ende an dem Prothesenkragen und an seinem anderen Ende an dem Oberschenkelknochen befestigt ist>A modified embodiment of the proposed Hip joint prosthesis can run through an additional one on the outside of the thigh bone Mark the tension strap at one end to the prosthetic collar and at its other end attached to the thighbone>

Nachfolgend werden anhand der Zeichnung zwei Ausführungsfonaen der Erfindung näher erläutert und beschrieben. In the following, two execution fonaen are based on the drawing the invention explained and described in more detail.

Es zeigen :Show it :

4 09883/00964 09883/0096

Figur 1 : eine im Oberschenkelknochen eingesetzte bekannte Hüftgelenkprothese,Figure 1: a known hip joint prosthesis inserted in the thigh bone,

Figur 2 : eine erste Ausführungsform der vorgeschlagenen Hüftgelenkprothese,Figure 2: a first embodiment of the proposed hip joint prosthesis,

Figur 3 * einen Querschnitt entlang Schnittlinie III-III in Figur 2FIG. 3 * shows a cross section along section line III-III in FIG

und
Figur h ι eine zweite Ausführungsforin.and
Figure h ι a second embodiment.

Die in der Figur 1 dargestellte bekannte Hüftgelenkprothese umfaßt eine Kugel 5» einen Prothesenkragen h und den leicht gebogenen Schaft 6, der mittels eines geieigneten Zements 2 im Knochen 1 eingesetzt ist· Da die sich aus den vertikalen und horizontalen Teilkräften Kv und Kh zusammensetzende resultierende Kraft Kr an der Kugel 5 angieift, ergibt sich hieraus ein in Richtung der Pfeile 11 schädlich auf die Knocheninnenseite 8 einwirkendes Drehmoment· Eine zweite in der gleichen Richtung schädlich wirkende Kraft ergibt sich Scherkraft in Richtung der Ebene K des Prothesenkragens kt da bei den bekannten Hüftgelenkprothesen zwischen der Ebene K und der Längsachse L des Oberschenkelknochens 1 in der Regel nur ein Winkel alpha von 30 oder 45 ° eingeschlossen wird. Dies bedingt, daß die resultierende Kraft Kr nicht rechtwinklig auf die Ebene Kdes Prothesenkragens k auftrifft, sondern eine in Richtung der Ebene K wirkende Scherkraft erzeugt. Eine dritte ebenfalls in der gleichen Richtung schädliche Kraft ergibt sichThe known hip joint prosthesis shown in FIG. 1 comprises a ball 5 »a prosthesis collar h and the slightly curved shaft 6, which is inserted into the bone 1 by means of a suitable cement 2. Since the resulting force composed of the vertical and horizontal partial forces Kv and Kh Kr at the ball 5, this results in a damaging torque acting on the inside of the bone 8 in the direction of the arrows 11 A second damaging force in the same direction results in the shear force in the direction of the plane K of the prosthetic collar k t da in the known hip joint prostheses As a rule, only an angle alpha of 30 or 45 ° is included between the plane K and the longitudinal axis L of the femur 1. This means that the resulting force Kr does not impinge at right angles on the plane K of the prosthesis collar k , but rather generates a shear force acting in the direction of the plane K. A third force, also damaging in the same direction, arises

409883/0096409883/0096

aufgrund der keilförmigen Querschnittsform der bekannten Hüftgelenkprothese, die die Knochen« zone 8 zum Aufspalten veranlaßt· Die Erfindung geht von der Erkenntnis aus, daß die beobachteten Prothesenbrüche auf das gleichgerichtete Zusammenwirken der oben erwähnten Drehmomentenkraft (das Drehmoment ergibt sich aus der Summe der beiden Winkel beta = 16 und gamma =9 )» der schädlichen Scherkraft infolge eines zu steil stehenden Prothesenkragens und der schädlichen keilförmigen Querschnittsform des Schaftes zurückzuführen sind.due to the wedge-shaped cross-sectional shape of the well-known hip joint prosthesis, which the bones « zone 8 caused to split · The invention is based on the knowledge that the observed Prosthesis fractures on the rectified interaction of the above-mentioned torque force (the Torque results from the sum of the two angles beta = 16 and gamma = 9) »the harmful Shear force due to a too steep prosthetic collar and the damaging wedge-shaped Cross-sectional shape of the shaft are due.

Die in den Figuren 2 bis 4 dargestellten beiden Ausführungsformen der erfindungsgemäßen Hüftgelenkprothese elliminieren diese schädlichen, die Knochenzone 8 aufsprengenden Kräfte. Bei beiden Ausführungsformen ist von Bedeutung, daß der Winkel alpha zwischen der Ebene K des Prothesenkragens k und der Längsachse L des Oberschenkelknochens 1 wesentlich vergrößert ist und etwa ^ bis 65 beträgt. Damit ist gewährleistet, daß die resultierende Kraft Kr etwa rechtwinklig auf die Ebene K des Prothesenkragens auftrifft und keinerlei Scherkraft erzeugt.The two embodiments of the hip joint prosthesis according to the invention shown in FIGS. 2 to 4 eliminate these harmful forces which burst open the bone zone 8. In both embodiments it is important that the angle alpha between the plane K of the prosthesis collar k and the longitudinal axis L of the femur 1 is substantially increased and amounts to approximately ^ to 65. This ensures that the resulting force Kr strikes the plane K of the prosthesis collar approximately at right angles and does not generate any shear force.

Ferner wird durch die neue Formgebung· des Schaftes, die sich insbesondere aus der Figur 3 ergibt, bewirkt, daß die schädliche Keilwirkung vermieden wird. DerFurthermore, the new shape of the shaft, which results in particular from FIG. 3, has the effect that the harmful wedge effect is avoided. Of the

409883/0096409883/0096

Der Schaft 6 weist zweckmäßig zwei gegenüberliegende Längsnuten 7 auf und ist mittels des Knochenzements 2 in der Knochenmasse 3 eingelagert. Die der Knocheninnenseite 8 gegenüberliegende Zone des Schaftes 6 ist s der Knochenkontur entsprechen gerundet ausgebildet, so daß die beiderseitigen Krümmungsradien · R 1 und R 2 einander größtmöglich angeglichen sind«The shaft 6 expediently has two opposite longitudinal grooves 7 and is secured by means of the bone cement 2 stored in the bone mass 3. The zone of the Shank 6 is rounded to correspond to the bone contour, so that the radii of curvature on both sides · R 1 and R 2 are as close as possible to one another «

Bei der in Figur 4 dargestellten zweiten Ausführungsform werden insbesondere die schädlichen Drehmomentkräfte durch eine zusätzliche Zuggurtung 9 aufgehoben, die den Prothesenkragen k mittels zusätzlicher Befestigungsmittel 10 mit dem Knochen 1 verbinden. In diesem Fall ist es möglich, den Schaft 6 wesentlich dünner und gegebenenfalls aus elastischem Material herzustellen, was den Festigkeitseigenschaftendes Knochens näherkommt·In the second embodiment shown in FIG. 4, in particular the damaging torque forces are eliminated by an additional tension strap 9 which connects the prosthesis collar k to the bone 1 by means of additional fastening means 10. In this case it is possible to make the shaft 6 much thinner and possibly made of elastic material, which comes closer to the strength properties of the bone.

Da die oben beschriebenen Hüftgelenkprothesen die bei den bekannten Hüftgelenkprothesen aufgetretenen Schwierigkeiten vermeiden, kann mit Sicherheit angenommen werden, daß mit diesen neuen Hüftgelenkprothesen nunmehr dauerhafte Implantationen möglich sind.Since the hip joint prostheses described above difficulties encountered with the known hip joint prostheses avoid, it can be safely assumed that with these new hip joint prostheses now permanent implants are possible.

409883/0096409883/0096

Claims (4)

20. Juni 1973 lfd. Nr. 73 172June 20, 1973 serial no.73 172 PatentansprücheClaims _ Hüftgelenkprothese mit Kugel, Prothesenkragen und Schaft,_ Hip joint prosthesis with ball, prosthetic collar and shaft, dadurch gekennzeichnet, daß zwischen der Ebene (κ) des Prothesenkragens (4) und der Längsachse (l) des Oberschenkelknochens (1) etwa ein Winkel (alpha) von 55 bis 65 eingeschlossen ist.characterized in that between the plane (κ) of the prosthesis collar (4) and the longitudinal axis (l) of the femur (1) approximately an angle (alpha) of 55 to 65 is included. 2. Hüftgelenkprothese nach Anspruch 1,2. Hip joint prosthesis according to claim 1, dadurch gekennzeichnet, daß der Prothesenschaft (6) eine solche Querschnittsform besitzt, daß die Krümmungsradien (r^r«) der inneren Oberschenkelknochenzone (8) und des dieser Zone benachbarten Schaftabschnitts so weit wie möglich einander angeglichen sind.characterized in that the prosthesis shaft (6) has such a cross-sectional shape that the Radii of curvature (r ^ r «) of the inner thigh bone zone (8) and the shaft section adjacent to this zone are aligned with one another as much as possible are. 3. Hüftgelenkprothese nach Anspruch 2,3. hip joint prosthesis according to claim 2, dadurch gekennzeichnet, daß der Prothesenschaft (6) zwei gegenüberliegend angeordnete Längsnuten (7) aufweist.characterized in that the prosthesis shaft (6) has two oppositely arranged longitudinal grooves (7). 4. Hüftgelenkprothese nach Anspruch 1,4. hip joint prosthesis according to claim 1, dadurch gekennzeichnet, daß der Prothesenkragen (4) mittels eines auf der Aussenseite des Oberschenkelknochens verlaufenden Zuggurtes (9) am Oberschenkelknochen zusätzlich (1O) befestigt ist.characterized in that the prosthesis collar (4) by means of one on the outside of the thigh bone running tension belt (9) on the thigh bone is additionally attached (1O). 409883/0096409883/0096
DE19732331728 1973-06-22 1973-06-22 Hip joint prosthesis - given angle between plane of collar and long axis of femur Pending DE2331728A1 (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2344272A1 (en) * 1976-03-20 1977-10-14 Baumann Friedrich HIP JOINT PROSTHESIS
FR2433932A1 (en) * 1978-07-25 1980-03-21 Sigri Elektrographit Gmbh Hip joint prosthesis - with semi:cylindrical straps on stem flange screwed to femur
FR2501497A1 (en) * 1981-03-14 1982-09-17 Schuett & Grundei Med Tech ENDOPROTHESIS FOR THE JOINING OF THE FEMER TO THE HIP
DE3125658A1 (en) * 1981-06-30 1983-01-13 Waldemar Link (Gmbh & Co), 2000 Hamburg Hip endoprosthetic arrangement
US4408359A (en) * 1981-04-07 1983-10-11 New York Society For The Relief Of The Ruptured And Crippled, Maintaining The Hospital For Special Surgery Hip joint prosthesis
EP0112423A1 (en) * 1982-12-17 1984-07-04 Francis Henri Bréard Joint prosthesis, especially femoral prosthesis with self-blocking, wedge-shaped intramedullary stem
DE3338314A1 (en) * 1983-10-21 1985-07-25 orthoplant Endoprothetik GmbH, 2800 Bremen Tumour hip endoprosthesis
EP0163013A1 (en) * 1984-04-02 1985-12-04 Emil Schenker AG Stem for a hip prosthesis
DE3736304A1 (en) * 1987-10-27 1989-05-11 Witzel Ulrich Femoral part of a hip joint endoprosthesis
WO1997046179A1 (en) * 1996-06-03 1997-12-11 Mathys Medizinaltechnik Ag Femur component for a hip endoprosthesis
WO2008046734A1 (en) * 2006-10-19 2008-04-24 Jacques Valloton Endoprosthesis for a hip joint
WO2009115281A3 (en) * 2008-03-17 2010-02-18 Franz Senior Copf Prosthetic body for an upper leg prosthetic
US8852288B2 (en) 2007-05-09 2014-10-07 Biomet Uk Limited Hip prosthesis

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2344272A1 (en) * 1976-03-20 1977-10-14 Baumann Friedrich HIP JOINT PROSTHESIS
US4101985A (en) * 1976-03-20 1978-07-25 Friedrich Baumann Hip-joint prosthesis
FR2433932A1 (en) * 1978-07-25 1980-03-21 Sigri Elektrographit Gmbh Hip joint prosthesis - with semi:cylindrical straps on stem flange screwed to femur
FR2501497A1 (en) * 1981-03-14 1982-09-17 Schuett & Grundei Med Tech ENDOPROTHESIS FOR THE JOINING OF THE FEMER TO THE HIP
US4408359A (en) * 1981-04-07 1983-10-11 New York Society For The Relief Of The Ruptured And Crippled, Maintaining The Hospital For Special Surgery Hip joint prosthesis
DE3125658A1 (en) * 1981-06-30 1983-01-13 Waldemar Link (Gmbh & Co), 2000 Hamburg Hip endoprosthetic arrangement
EP0112423A1 (en) * 1982-12-17 1984-07-04 Francis Henri Bréard Joint prosthesis, especially femoral prosthesis with self-blocking, wedge-shaped intramedullary stem
DE3338314A1 (en) * 1983-10-21 1985-07-25 orthoplant Endoprothetik GmbH, 2800 Bremen Tumour hip endoprosthesis
EP0163013A1 (en) * 1984-04-02 1985-12-04 Emil Schenker AG Stem for a hip prosthesis
US4657552A (en) * 1984-04-02 1987-04-14 Emil Schenker Ag Prosthesis of the hip
DE3736304A1 (en) * 1987-10-27 1989-05-11 Witzel Ulrich Femoral part of a hip joint endoprosthesis
DE3913874C1 (en) * 1987-10-27 1990-05-23 Ulrich Dr.-Ing. 5600 Wuppertal De Witzel Hip joint prosthesis femur part - has shaft, whose cross-section is helically twisted from proximal to distal end
WO1997046179A1 (en) * 1996-06-03 1997-12-11 Mathys Medizinaltechnik Ag Femur component for a hip endoprosthesis
AU708593B2 (en) * 1996-06-03 1999-08-05 Mathys Medizinaltechnik Ag Femur component for a hip endoprosthesis
WO2008046734A1 (en) * 2006-10-19 2008-04-24 Jacques Valloton Endoprosthesis for a hip joint
US8852288B2 (en) 2007-05-09 2014-10-07 Biomet Uk Limited Hip prosthesis
EP2155118B1 (en) * 2007-05-09 2017-01-11 Biomet UK Limited Metaphyseal hip prosthesis
WO2009115281A3 (en) * 2008-03-17 2010-02-18 Franz Senior Copf Prosthetic body for an upper leg prosthetic

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