DE3426947C2 - Thigh part of a hip joint endoprosthesis - Google Patents

Thigh part of a hip joint endoprosthesis

Info

Publication number
DE3426947C2
DE3426947C2 DE3426947A DE3426947A DE3426947C2 DE 3426947 C2 DE3426947 C2 DE 3426947C2 DE 3426947 A DE3426947 A DE 3426947A DE 3426947 A DE3426947 A DE 3426947A DE 3426947 C2 DE3426947 C2 DE 3426947C2
Authority
DE
Germany
Prior art keywords
thigh
shaft
section
hip joint
cross
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
DE3426947A
Other languages
German (de)
Other versions
DE3426947A1 (en
Inventor
Harry Prof. Dr.med. 1000 Berlin Buse
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
Priority to DE3426947A priority Critical patent/DE3426947C2/en
Priority to BR8506770A priority patent/BR8506770A/en
Priority to AU44930/85A priority patent/AU4493085A/en
Priority to EP85902962A priority patent/EP0183809A1/en
Priority to PCT/DE1985/000202 priority patent/WO1986000011A1/en
Priority to HU853039A priority patent/HUT59812A/en
Publication of DE3426947A1 publication Critical patent/DE3426947A1/en
Priority to DK56486A priority patent/DK56486D0/en
Application granted granted Critical
Publication of DE3426947C2 publication Critical patent/DE3426947C2/en
Expired 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
    • A61F2/30721—Accessories
    • A61F2/30724—Spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/3676—Distal or diaphyseal parts of shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • 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
    • A—HUMAN NECESSITIES
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    • 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
    • A61F2/367—Proximal or metaphyseal parts of 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
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    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/3672—Intermediate parts of shafts
    • A—HUMAN NECESSITIES
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/3011—Cross-sections or two-dimensional shapes
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    • 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
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    • 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
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    • 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
    • A61F2002/30405—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves
    • 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
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • A61F2002/30571—Leaf springs
    • A—HUMAN NECESSITIES
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    • 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
    • A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • 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
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    • 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
    • A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
    • A—HUMAN NECESSITIES
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    • 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
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    • 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
    • A61F2002/30594—Special structural features of bone or joint prostheses not otherwise provided for slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
    • A—HUMAN NECESSITIES
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    • 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
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    • 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
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    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
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    • 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
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    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
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    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
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    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel

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

Ein Hüftschaft-Implantat für zementloses Implantieren, das aus einem Kopfteil und einem Halsteil aus Stahl sowie einem Schaftteil mit profilierter Oberfläche besteht, wobei das Schaftteil wenigstens im oberen Bereich ebenfalls aus Stahl besteht, ist dadurch gekennzeichnet, daß nur der dem Halsteil zugewandte obere Bereich des Schaftteils eine Oberflächenprofilierung und einen in Transversalrichtung unrunden, länglich gestreckten Querschnitt besitzt, daß der vom Halsteil abgewandte untere Bereich des Schaftteils nicht oberflächenprofiliert ist, einen runden Querschnitt aufweist und durch vom freien Ende ausgehende Längsschlitze in mehrere voneinander beabstandete Rippen unterteilt ist und daß zwischen dem Halsteil und dem Schaftteil ein Kragen ausgebildet ist.A hip shaft implant for cementless implantation, which consists of a head part and a neck part made of steel as well as a shaft part with a profiled surface, the shaft part also being made of steel at least in the upper area, is characterized in that only the upper area of the Shank part has a surface profiling and a transversely non-circular, elongated cross-section, that the lower area of the shaft part facing away from the neck part is not surface-profiled, has a round cross-section and is divided into several spaced-apart ribs by longitudinal slots extending from the free end and that between the neck part and a collar is formed on the shaft part.

Description

Die Erfindung betrifft einen Oberschenkelteil einer Hüftgelenk-Endoprothese für eine zementlose Implantation nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a thigh part of a hip joint endoprosthesis for cementless implantation according to the preamble of claim 1.

Aus der DE-OS 28 39 661 ist ein Oberschenkelteil einer Hüftgelenk-Endoprothese für eine zementlose Implantation bekannt, der zwecks Vermeidung einer Verdrehung gegenüber dem Femur breit- und rechteckig ist. In seinem oberen Bereich ist dieser Oberschenkelteil mit Zähnen versehen, zwischen die Löcher gebohrt sind. Die Zähne dienen zur Erweiterung von mit speziellen Feilen im Femur eingearbeiteten öffnungen, wobei Knochenspäne die runden Löcher und den Raum zwischen den Zähnen und Knochen ausfüllen sollen. Dieser bekannte Oberschenkekeil weist auch einen, einen Kragen aufweisenden Hals auf. In seinem unteren Bereich ist der rechteckige Oberschenkelteil glatt, jedoch mit ovalen Längskanälen in seinen vier Seiten versehen, welche ein Anwachsen des Druckes im Medullärkanal beim Einstecken des Oberschenkelteils verhindern sollen. Bei einer Belastung dieses Oberschenkelteils kann eine Lockerung durch am Kopf quer zur Längsachse angreifende, ein Moment erzeugende, Kräfte erfolgen.From DE-OS 28 39 661 a thigh part of a hip joint endoprosthesis for cementless implantation is known, which is wide and rectangular in order to avoid twisting with respect to the femur is. In its upper area, this thigh part is provided with teeth, between which holes are drilled. The teeth serve to widen openings made in the femur with special files, whereby Bone shavings are designed to fill the round holes and the space between the teeth and bones. This known thigh wedge also has a neck having a collar. In its lower area the rectangular thigh part is smooth, but provided with oval longitudinal channels in its four sides, which are intended to prevent an increase in pressure in the medullary canal when inserting the thigh section. With a load on this part of the thigh can a loosening takes place through forces acting on the head transversely to the longitudinal axis and generating a moment.

Oberschenkelteile einer Hüftgelenk-Endoprothese mit einem Schaft, mit einem quer zur Längsachse unrunden länglichen Querschnitt, sind ebenfalls aus der DE-OS 28 05 305 und der DE-OS 30 27 832 bekannt.Thigh parts of a hip joint endoprosthesis with a shaft, with a transverse to the longitudinal axis non-circular elongated cross-section, are also known from DE-OS 28 05 305 and DE-OS 30 27 832.

Aus der FR-PS 24 83 218 ist ein Oberschenkelteil einer Hüftgelenk-Endoprothese bekannt, welcher über seine Gesamtlänge hinweg geschlitzt ist. Dieser Oberschenkelteil ist derart elastisch, daß er mit Paßsitz im medullaren Kanal durch eine Ausdehnung seiner TeileFrom FR-PS 24 83 218 a thigh part of a hip joint endoprosthesis is known, which over its entire length is slotted away. This thigh part is so elastic that it fits with a snug fit medullary canal by an expansion of its parts sitzen kann. Dieser bekannte Oberschenkelteil weist über seine gesamte Länge hinweg einen runden Querschnitt auf und ist somit nicht drehfestcan sit. This known thigh part has has a round cross-section over its entire length and is therefore not non-rotatable

Diese bekannten Oberschenkelteile bestehen durchgehend aus einem Material, beispielsweise aus Stahl oder einem anderen Metall. Mit den zuerst genannten Oberschenkelteilen wird eine Drehfestigkeit erreicht Diese können jedoch keine Momente aufnehmen, so daß die Gefahr einer Lockerung besteht Mit OberThese known thigh parts consist entirely of one material, for example steel or another metal. A torsional strength is achieved with the first-mentioned thigh parts However, these cannot absorb moments, so that there is a risk of loosening schenkelteilen, wie sie aus der FR-PS bekannt sind, wird zwar ein Paßsitz erzielt, jedoch kann eine Lockerung durch Drehkräfte auftreten.leg parts, as they are known from the FR-PS, is Although a snug fit is achieved, loosening can occur due to rotational forces.

Der Erfindung liegt die Aufgabe zu Grunde, einen Oberschenkelteil einer Hüftgelenk-Endoprothese zuThe invention is based on the object of providing a thigh part of a hip joint endoprosthesis

is schaffen, der sowohl drehstabil ist, als auch im unteren Bereich eine Formschlüssigkeit mit dem natürlichen Knochen ermöglicht und aus unterschiedlichen Materialien herstellbar ist Erfindungsgemäß wird diese Aufgabe dadurch gelöstis create, which is both torsionally stable, as well as in the lower Area enables a form fit with the natural bone and can be produced from different materials This object is achieved according to the invention daß der Schaft in einer oberen, aus Stahl bestehenden Teil und einen mit dem oberen Teil verbindbaren unteren Teil aufgeteilt ist Die Profilierung ist am oberen Teil angeordnet und der untere Teil kann aus Metall oder Kunststoff bestehen, einen runden Querschnitt und vomthat the shaft in an upper, made of steel Part and a lower part that can be connected to the upper part is divided. The profiling is on the upper part arranged and the lower part can be made of metal or plastic, a round cross-section and dated freien Ende ausgehende Längsschlitze aufweisen.have free end outgoing longitudinal slots.

Der obere Teil des Schaftes, der einen unrunden Querschnitt hat und somit eine Verdrehung iin Knochen verhindert, weist eine profilierte Oberfläche in dem Bereich auf, in dem ein spongiöser Knochen vorhanden ist.The upper part of the shaft, which has a non-circular cross-section and thus a twist in bone prevented, has a profiled surface in the area where a cancellous bone is present.

Dieser spongiöse Knochenabschnitt ermöglicht ein Anwachsen des Knochens in einer Verankerung in der profilierten Oberfläche dieses oberen Teiles. Der untere Teil mit rundem Querschnitt und vom freien Ende ausgehenden Längsschlitzen erleichtert durch eine Seltost-This cancellous bone section enables the bone to grow in an anchorage in the profiled surface of this upper part. The lower Part with a round cross-section and longitudinal slots emanating from the free end facilitated by a Seltost zentrierung das Einführen dieses Oberschenkelteils in das Knocheninnere und gewährleistet einen formschlüssigen Paßsitz. Durch diesen formschlüssigen Pa Bsi Iz werden Belastungen aufgenommen, die ein Moment am Oberschenkeiteil erzeugen. Die Oberfläche dieses untecentering the insertion of this thigh part into the inside of the bone and ensures a form-fitting fit. Through this form-fitting Pa Bsi Iz loads are absorbed that create a moment on the thigh part. The surface of this below ren Teiles ist nicht profiliert da an dieser Stelle kein Anwachsen des Knochens erfolgt.The other part is not profiled because there is no Accumulation of the bone occurs.

Mit besonderem Vorteil kann der Querschnitt des oberen Teiles des Schaftes ellipsenförmig oder rechtekkig sein. Durch diese Ausbildung werden Umfangsspan-With particular advantage, the cross section of the upper part of the shaft can be elliptical or rectangular. Through this training, circumferential machining nungsbrüche des Knochens vermieden.fractures of the bone avoided.

Wenn der untere Teil aus einem plastisch verformbaren Material, wie Polyäthylen, besteht, kann eine plastische Formschlüssigkeit erzielt werden. Je nach Körpergröße, Geschlecht usw. sind die Querschnittsgrößen desIf the lower part is made of a plastically deformable material such as polyethylene, a plastic form fit can be achieved. Depending on body size, gender, etc., the cross-sectional sizes of the Oberschenkelknochens und der Markhöhle sehr unterschiedlich. Durch die Elastizität bzw. Plastizität des unteren Teiles des Schaftes werden diese individuellen Unterschiede weitgehend ausgeglichen. Für extreme Unterschiede im KnochenquerschnitlThigh bone and medullary cavity very different. These individual differences are largely compensated for by the elasticity or plasticity of the lower part of the shaft. For extreme differences in the bone cross-section müssen unterschiedlich bemessene Oberschenkelteileneed different sized thigh parts bereitgehalten werden. Der Innendurchmesser desbe kept ready. The inside diameter of the

Oberschenkelknochens kann beispielsweise zwischen 8Thigh bone can, for example, between 8

und 18 mm variieren.and 18 mm.

Um eine allzu große Lagerhaltung vollständige Ober-In order to keep an excessively large stock

schenkelteile zu vermeiden und die schnelle Auswahl während der Operation zu ermöglichen, können mit Vorteil der obere und der untere teil des Schaftes als getrennte Bauteile hergestellt und auf Lager gehalten werden. Der obere.Teil kann beispielsweise nur in eineravoiding thigh parts and enabling quick selection during the operation can be done with Advantage: the upper and the lower part of the shaft are manufactured as separate components and kept in stock will. The upper part, for example, can only be in one Einheitsgröße hergestellt und auf Lager gehalten werden, während der untere, mit dem oberen Teil lösbar zu verbindende, Teil in verschiedenen Größen und verschiedenen Materialien hergestellt und auf Lager gehal-One size can be manufactured and kept in stock, while the lower one, with the upper part detachable too connecting, part made in different sizes and different materials and kept in stock

|ί ten werden kann.can be.

f Es kann vorteilhaft sein, die beiden Teile des Schaftes j| durch eine Schraubverbindung miteinander zu verbin-I* uen. Die beiden Teile können dann während der Operay tion leicht miteinander verschraubt werden.f It can be advantageous to use the two parts of the shaft j | to be connected to each other by a screw connection * uen. The two parts can then be used during the Operay tion can easily be screwed together.

ψ Für eine zusätzliche Drehstabilität kann der obere |; Teil des Schaftes an seinem oberen Ende, beispielsweise ä an der konvexen Seite des Schaftes einen Vorsprung aufweisen. Dieser Vorsprung wird beim Implantieren in eine Ausnehmung des Oberschenkelmantels eingelegt und dient als Anschlagsperre. Zweckmäßiger Weise erstreckt sich dieser Vorsprung in einer Richtung quer zur Längsachse des Schaftes. ψ The upper |; Part of the shaft at its upper end, for example - have a projection on the convex side of the shaft. This projection is inserted into a recess in the thigh jacket during implantation and serves as a stop lock. This projection expediently extends in a direction transverse to the longitudinal axis of the shaft.

Ausführungsbeispiele der Erfindung sollen unter Bezugnahme auf die Figuren der Zeichnung erläutert werden. Es zeigtEmbodiments of the invention will be explained with reference to the figures of the drawing. It shows

Fig. 1 eine senkrechte Schnittansicht eines in den Oberschenkelknochen implantierten Oberschenkelteils einer Hüftgelenk-Endoprothese undFig. 1 is a vertical sectional view of a femur part implanted in the femur a hip joint endoprosthesis and

F i g. 2 eine Schnittansicht genommen läng? der Linie II-HderFig.1.F i g. 2 is a sectional view taken along? the line II-HderFig. 1.

Der nach der Entfernung des Hüftgelenkes in den Oberschenkelknochen eingesetzte Oberschenkelteil einer Hüftgelenk-Endoprothese besteht aus einem Kopf 1, einem Hals 2, einem Kragen 3, einem Schaft mit einem oberen Teil 4 und einem unteren Teil 5. Der untere Teil 5 ist mittels einer Schraubverbindung 8 mit dem oberen Teil 4 verbunden.The part of the thigh inserted into the thigh bone after the hip joint has been removed Hip joint endoprosthesis consists of a head 1, a neck 2, a collar 3, a shaft with a upper part 4 and a lower part 5. The lower part 5 is by means of a screw connection 8 with the upper Part 4 connected.

Der obere Teil 4 aus Stahl besitzt eine Oberflächenprofilierung 13, vorzugsweise in der Form einer unregelmäßigen Körnung. Der obere Teil 4 ist nicht formschlüssig und liegt in dem spongiösen Knochenbereich 6. Wie in F i g. 2 gezeigt ist, hat der obere Teil 4 einen länglich gestreckten Querschnitt, etwa in der Form eines Rechteckes mit abgerundeten Ecken. Am oberen Ende unterhalb des Kragens 3 besitzt der Teil 4 einen seitlichen Vorsprung 12, der in einer hierfür hergestellten Ausnehmung des oberen Endes 11 des Oberschenkelknochens liegt und so als Anschlagsperre dient, um eine zusätzliche Drehstabilität zu bekommen.The upper part 4 made of steel has a surface profile 13, preferably in the form of an irregular one Grit. The upper part 4 is not form-fitting and lies in the cancellous bone area 6. As in Fig. 2, the upper part 4 has an elongated cross-section, approximately in the shape of a Rectangle with rounded corners. At the upper end below the collar 3, the part 4 has a lateral projection 12, which is in a recess made for this purpose in the upper end 11 of the thigh bone and thus serves as a stop lock to get additional rotational stability.

Der formschlüssige untere, nicht profilierte, d. h. glatte Teil 5 des Schaftes mit rundem Querschnitt, der beispielsweise auch aus Stahl besteht, besitzt von seinem freien Ende ausgehende Längsschlitze 9, die Rippen 10 bilden. Wegen des Rückstellvermögens des Werkstoffes des unteren Teiles sind die Rippen zusammendrückbar, pressen sich aber auf Grund ihres Rückstellvermögens fest gegen die Innenwandung des kortikalen Knochenbereiches 7 und ergeben so eine gute Form- und Kraftschlüssigkeit. The form-fitting lower, non-profiled, d. H. smooth part 5 of the shaft with a round cross-section, for example Also made of steel, has longitudinal slots 9, the ribs 10, extending from its free end form. Because of the resilience of the material of the lower part, the ribs are compressible, but because of their resilience they press themselves firmly against the inner wall of the cortical bone area 7 and thus result in good positive and non-positive locking.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

5555

6565

Claims (5)

Patentansprüche:Patent claims: 1. Oberschenkelteil einer Hüftgelenk-Endoprothese für eine zementlose Implantation, mit einem Kopf, einem einen Kragen aufweisenden Hals und einem im oberen Bereich der Oberfläche profilierten Schaft mit einem quer zur Längsachse unrunden, länglichen Querschnitt, dadurch gekennzeichnet, daß der Schaft (4, S) in einen oberen, aus Suhl bestehenden Teil (4) und einen mit dem oberen Teil verbindbaren unteren Teil (5) aufgeteilt ist, daß die Profilierung am oberen Teil (4) angeordnet ist und daß der untere Teil (5) aus Metall oder Kunststoff besteht und einen runden Querschnitt und vom freien Ende ausgehende Längsschlitze (9) aufweist.1. Thigh part of a hip joint endoprosthesis for cementless implantation, with a Head, a neck having a collar and a profiled in the upper area of the surface Shank with an oblong cross-section that is non-circular transversely to the longitudinal axis, characterized in that the shank (4, S) is divided into an upper, consisting of Suhl part (4) and a lower part (5) that can be connected to the upper part is that the profiling is arranged on the upper part (4) and that the lower part (5) made of metal or Consists of plastic and has a round cross-section and longitudinal slots (9) emanating from the free end having. 2. Oberschenkelteil nach Anspruch 1, dadurch gekennzeichnet, daß die Querschnittsfläche des oberen Teiles (4) des Schaftes (4,5) elliptisch oder rechtekkig ist.2. thigh part according to claim 1, characterized in that the cross-sectional area of the upper Part (4) of the shaft (4,5) is elliptical or rectangular. 3. Oberschenkelteil nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der obere Teil (4) und der untere Teil (5) miteinander verschraubt (8) sind.3. thigh part according to claim 1 or 2, characterized in that the upper part (4) and the lower part (5) are screwed together (8). 4. Oberschenkelteil nach einem der Ansprüche 1 —3, dadurch gekennzeichnet, daß die Oberflächenprofilierung (13) des oberen Teiles (4) des Schaftes (4,5) unregelmäßig-körnig ist4. thigh part according to any one of claims 1-3, characterized in that the surface profiling (13) of the upper part (4) of the Shank (4,5) is irregular-grainy 5. Oberschenkelteil nach einem der Ansprüche 1 —4, dadurch gekennzeichnet, daß am oberen Ende des oberen Teiles (4) des Schaftes (4, 5) eine Anschlagsperre (12) in Form eines Vorsprunges angeordnet ist.5. thigh part according to any one of claims 1-4, characterized in that the upper At the end of the upper part (4) of the shaft (4, 5) there is a stop lock (12) in the form of a projection.
DE3426947A 1984-06-07 1984-07-21 Thigh part of a hip joint endoprosthesis Expired DE3426947C2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE3426947A DE3426947C2 (en) 1984-06-07 1984-07-21 Thigh part of a hip joint endoprosthesis
BR8506770A BR8506770A (en) 1984-06-07 1985-06-07 IMPLANT FOR LABEL-FEMURAL JOINT
AU44930/85A AU4493085A (en) 1984-06-07 1985-06-07 Implantable prothesis rod for the hip
EP85902962A EP0183809A1 (en) 1984-06-07 1985-06-07 Implantable prosthesis rod for the hip
PCT/DE1985/000202 WO1986000011A1 (en) 1984-06-07 1985-06-07 Implantable prosthesis rod for the hip
HU853039A HUT59812A (en) 1984-06-07 1985-06-07 Hip-joint prothesis
DK56486A DK56486D0 (en) 1984-06-07 1986-02-05 LOWER BONE IMPLANT

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3421145 1984-06-07
DE3426947A DE3426947C2 (en) 1984-06-07 1984-07-21 Thigh part of a hip joint endoprosthesis

Publications (2)

Publication Number Publication Date
DE3426947A1 DE3426947A1 (en) 1985-12-12
DE3426947C2 true DE3426947C2 (en) 1986-10-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE3426947A Expired DE3426947C2 (en) 1984-06-07 1984-07-21 Thigh part of a hip joint endoprosthesis

Country Status (7)

Country Link
EP (1) EP0183809A1 (en)
AU (1) AU4493085A (en)
BR (1) BR8506770A (en)
DE (1) DE3426947C2 (en)
DK (1) DK56486D0 (en)
HU (1) HUT59812A (en)
WO (1) WO1986000011A1 (en)

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DE3722853A1 (en) * 1987-07-10 1989-01-19 Kernforschungsz Karlsruhe Endoprosthesis for a femoral joint
DE3822854A1 (en) * 1988-07-06 1990-01-11 Roland Man Druckmasch Joint prosthesis for a hip joint
DE4440082A1 (en) * 1994-11-10 1996-05-15 Ilmenauer Implantate Manufaktu Prosthesis for hip joint
DE102013219656A1 (en) * 2013-09-27 2015-04-02 Heraeus Medical Gmbh Modular joint spacer system

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DE3627097A1 (en) * 1986-08-09 1988-02-18 S & G Implants Gmbh HANDLE FOR JOINT ENDOPROTHESES
DE8805583U1 (en) * 1988-04-27 1989-09-07 Espe Stiftung & Co Produktions- Und Vertriebs Kg, 8031 Seefeld, De
US5108452A (en) * 1989-02-08 1992-04-28 Smith & Nephew Richards Inc. Modular hip prosthesis
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JP4095003B2 (en) * 2003-09-12 2008-06-04 泉工医科工業株式会社 Mid- and distal-tips for artificial joints

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Publication number Priority date Publication date Assignee Title
DE3701198A1 (en) * 1987-01-15 1988-07-28 Buse Harry HIPSTER IMPLANT
DE3722853A1 (en) * 1987-07-10 1989-01-19 Kernforschungsz Karlsruhe Endoprosthesis for a femoral joint
DE3822854A1 (en) * 1988-07-06 1990-01-11 Roland Man Druckmasch Joint prosthesis for a hip joint
DE4440082A1 (en) * 1994-11-10 1996-05-15 Ilmenauer Implantate Manufaktu Prosthesis for hip joint
DE102013219656A1 (en) * 2013-09-27 2015-04-02 Heraeus Medical Gmbh Modular joint spacer system

Also Published As

Publication number Publication date
DK56486A (en) 1986-02-05
DE3426947A1 (en) 1985-12-12
HUT59812A (en) 1992-07-28
AU4493085A (en) 1986-01-10
DK56486D0 (en) 1986-02-05
EP0183809A1 (en) 1986-06-11
BR8506770A (en) 1986-09-23
WO1986000011A1 (en) 1986-01-03

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