DE202005013075U1 - Head of pin joint-cap implant building set for artificial hip joint, has anti-rotation assistance with two distal plates immersible into cervical head and auxiliary component for avoiding rotation of assistance within cap - Google Patents

Head of pin joint-cap implant building set for artificial hip joint, has anti-rotation assistance with two distal plates immersible into cervical head and auxiliary component for avoiding rotation of assistance within cap Download PDF

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Publication number
DE202005013075U1
DE202005013075U1 DE202005013075U DE202005013075U DE202005013075U1 DE 202005013075 U1 DE202005013075 U1 DE 202005013075U1 DE 202005013075 U DE202005013075 U DE 202005013075U DE 202005013075 U DE202005013075 U DE 202005013075U DE 202005013075 U1 DE202005013075 U1 DE 202005013075U1
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Prior art keywords
cap
rotation
assistance
head
aid
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DE202005013075U
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German (de)
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ORTHODYNAMICS GMBH, DE
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Eska Implants GmbH and Co KG
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Priority to DE202005013075U priority Critical patent/DE202005013075U1/en
Publication of DE202005013075U1 publication Critical patent/DE202005013075U1/en
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    • 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
    • A61F2/30734—Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
    • 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
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • A61F2/3603—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices implanted without ablation of the whole natural femoral head
    • 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
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • 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
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/302—Three-dimensional shapes toroidal, e.g. rings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections 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
    • 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
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    • 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
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30721—Accessories
    • A61F2/30734—Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
    • A61F2002/30736—Augments or augmentation pieces, e.g. wedges or blocks for bridging a bone defect
    • 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
    • A61F2002/30795—Blind bores, e.g. of circular cross-section
    • A61F2002/30797—Blind bores, e.g. of circular cross-section internally-threaded
    • 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
    • A61F2002/30795—Blind bores, e.g. of circular cross-section
    • A61F2002/30807—Plurality of blind bores
    • A61F2002/30808—Plurality of blind bores parallel
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30884—Fins or wings, e.g. longitudinal wings for preventing rotation within the bone 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30907—Nets or sleeves applied to surface of prostheses or in cement
    • A61F2002/30909—Nets
    • 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
    • A61F2002/3092—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth having an open-celled or open-pored structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections 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
    • 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
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0065—Three-dimensional shapes toroidal, e.g. ring-shaped, doughnut-shaped

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  • 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 set has a cap, whose contact areas are structured with a shank cervical head having an open netted, three dimensional space network structure. An anti-rotation assistance (3) is beaded on a guide pin or a reinforcing body. The assistance has two distal plates immersible into the cervical head and a proximal arresting auxiliary component (5) for avoiding rotation of the assistance within the cap.

Description

Die vorliegende Erfindung betrifft ein Set zur Erstellung eines Gelenkkopf-Kappenimplantates für ein künstliches Hüftgelenk.The The present invention relates to a set for creating a condyle cap implant for a artificial Hip joint.

In jüngster Zeit kommen verstärkt sogenannte Kappenimplantate zur Anwendung, welche über den präparierten natürlichen Restgelenkkopf bzw. über den resizierten Schenkelkopfhals gesetzt werden und in dieser Lage dann fixiert werden. Voraussetzung für eine stabile Sekundärfixation ist stabiles Knochenmaterial des Restknochens. So wird gemäß der DE-A-102 18 801 vorgeschlagen, an die Gelenkkopfkappe exakt mittig einen Zapfen anzukoppeln, der in eine entsprechende Ausfräsung im Schenkelhals gesetzt wird. Dieser Zapfen weist eine Oberfläche auf, welche mit einer dreidimensionalen offenmaschigen Raumnetzstruktur versehen ist, in welche und durch welche hindurch Knochentrabekel des umliegenden Knochenmaterials wachsen und für die stabile Sekundärfixation sorgen. Der Zapfen hat dabei eine tragende und fixierende Funktion.In recently, Time is increasing so-called cap implants for use, which over the groomed natural Residual joint head or over the resected femoral head neck are set and in this position then be fixed. Prerequisite for a stable secondary fixation is stable bone material of the residual bone. Thus, according to DE-A-102 18 801 proposed to the condyle cap exactly centered one Coupling pin, which in a corresponding cutout in Femoral neck is set. This pin has a surface, which with a three-dimensional open-mesh spatial network structure in which and through which bone trabeculae of the surrounding bone material and for stable secondary fixation to care. The pin has a supporting and fixing function.

Ein weiteres Beispiel für ein typisches Kappenimplantat zeigt die DE 20 2004 012 594 U1 . Das Set enthält anstelle des zuvor erwähnten Zapfen einen proximal im Polbereich der Kappe exakt mittig mit dieser verbindbaren Führungsstift, der nach Ausübung seiner Führungsfunktion während des Aufsatzes der Kappe auf den Schenkelkopfhals funktionslos ist. Dieser Führungsstift hat eine rein führende Funktion während des Aufsatzes der Kappe inne, um für eine achsgerechte Positionierung der Kappe auf dem präparierten Restgelenkkopf zu sorgen.Another example of a typical cap implant shows the DE 20 2004 012 594 U1 , The set contains instead of the aforementioned pin a proximally in the pole region of the cap exactly centered with this connectable guide pin which is inoperative after exercising its leadership function during the attachment of the cap on the femoral head neck. This guide pin has a purely leading function during the attachment of the cap held in order to ensure an appropriate positioning of the cap on the prepared residual joint head.

Ein noch weiteres Set der eingangs erwähnten Art ist in der DE 103 01 986 B4 beschrieben. Daran ist exakt mittig mit der Kappe ein sogenannter Armierungskörper verbindbar.Another set of the type mentioned is in the DE 103 01 986 B4 described. It is exactly centered with the cap a so-called Armierungskörper connectable.

Alle den erwähnten Kappenimplantaten ist gemeinsam, dass das Kappeninnere wenigstens zum Teil mit einer offenmaschigen dreidimensionalen Raumnetzstruktur belegt ist, in welche nach dem Aufsatz der Kappe auf den Restgelenkkopf Knochentrabekel einsprießen und dort verknöchern, um so für eine Langzeitfixation zu sorgen.All the mentioned Cap implants have in common that the cap interior at least for Part with an open-mesh three-dimensional spatial network structure is occupied, in which after the attachment of the cap on the residual joint head Sprouting bone trabeculae and ossify there, all for one To ensure long-term fixation.

Nun kann es in Einzelfällen dazu kommen, dass keine Knochentrabekel in die Raumnetzstruktur einwachsen, etwa aufgrund einer Frühmobilisierung von Patienten, die dazu führt, dass anstelle von Knochentrabekeln Bindegewebe in die Raumnetzstruktur einwächst. Hier kommt es dann zu Stabilitätsproblemen. Unter den hohen auftretenden Belastungen kann es in diesem Falle dazu kommen, dass die Kappe auf dem teilresizierten Schenkelkopfhals Mikrobewegungen ausführt, und zwar in erster Linie rotatorische Bewegungen, um die Verbindungsstelle zwischen der Kappe und dem Führungsstift bzw. Armierungskörper. Dies führt dazu, dass die Raumnetzstruktur im Kappeninneren den Knochen des Schenkelkopfhalses regelrecht abhobelt. Ab einem bestimmten Zeitpunkt ist der Sitz der Kappe auf dem Schenkelkopfhals dann so instabil, dass eine Nachversorgung ansteht. Die Nachversorgung kann aufgrund der Beeinträchtigung der Knochenstruktur durch die Raumnetzstruktur problematisch sein.Now can it in individual cases In addition, no bone trabeculae grow into the spatial network structure, for example due to early mobilization of Patient that leads to that connective tissue grows into the spatial network structure instead of bone trabeculae. Here then it comes to stability problems. Under the high occurring loads it can in this case come to that cap on the partially-resected femoral head neck Micro-movements, primarily rotational movements around the junction between the cap and the guide pin or reinforcing body. this leads to to the fact that the spatial net structure in the cap inside the bone of the Shaved off the femoral neck neck. At a certain time the fit of the cap on the femoral head neck is then so unstable that an additional supply is pending. The aftercare may be due the impairment the bone structure through the spatial network structure be problematic.

Aufgabe der vorliegenden Erfindung ist es daher, ein eingangs erwähntes Set dahingehend weiterzubilden, dass der erwähnte Effekt der Mikrobewegungen der Kappe auf dem Schenkelkopfhals unterbunden wird.task The present invention is therefore an initially mentioned set to further develop that the mentioned effect of micro-movements the cap on the femoral head neck is prevented.

Gelöst wird diese Aufgabe bei einem Set der eingangs erwähnten Art durch wenigstens eine auf den Führungsstift bzw. Armierungskörper auffädelbare Anti-Rotationshilfe mit wenigstens zwei nach distal abragenden, in den teilresizierten Schenkelkopfhals versenkbaren Schilden sowie mit einer proximalen Arretierungshilfe zur Vermeidung einer Rotation der Anti-Rotationshilfe im Inneren der Kappe.Is solved this task in a set of the type mentioned by at least one on the guide pin or reinforcing body auffädelbare Anti-rotation aid with at least two distally protruding, in the partially resected femoral head neck retractable shields and with a proximal locking aid to prevent rotation the anti-rotation aid inside the cap.

Durch die Anti-Rotationshilfe auf dem Stift bzw. Armierungskörper werden etwaige Mikrobewegungen der Kappe auf dem Restgelenkkopf wirksam unterbunden, selbst wenn die Sekundärfixation der Kappe aus irgendwelchen Gründen nach einer gewissen Zeit immer noch nicht optimal ist.By the anti-rotation aid on the pin or Armierungskörper be effectively prevent any micro-movements of the cap on the residual joint head, even if the secondary fixation the cap for any reason after some time is still not optimal.

Aus dem erfindungsgemäßen Set wird das Gelenkkopf-Kappenimplantat dadurch zusammengestellt, dass zunächst ein Führungsstift oder ein Armierungskörper exakt mittig mit dem Polbereich der Kappe verbunden wird. Dies kann beispielsweise durch eine Verschraubung geschehen. Sodann wird die Anti-Rotationshilfe auf den Stift bzw. Körper aufgefädelt, wobei dann die proximale Arretierungshilfe die Rotation der Anti-Rotationshilfe im Inneren der Kappe verhindert. Das so erstellte Implantat wird nun auf den präparierten Schenkelhals auf- und eingebracht, wobei die nach distal abragenden Schilde in dem Knochenmaterial versenkt werden.Out the set according to the invention becomes the condyle cap implant compiled by first of all a guide pin or a reinforcing body exactly is centrally connected to the pole portion of the cap. This can be done, for example a screwing done. Then the anti-rotation aid on the pen or body threaded, then the proximal locking aid rotation of the anti-rotation aid inside the cap prevents. The implant thus created becomes now on the prepared Up and introduced femoral neck, with the projecting distally Shields are buried in the bone material.

In bevorzugter Ausführung weist die Anti-Rotationshilfe einen ringförmigen Grundkörper auf, an dem die wenigstens zwei Schilde angeformt sind. Vorzugsweise sind die Schilde distal angeschliffen, so dass sie nach Art eines Messers leicht in das Knochenmaterial eingetrieben werden können.In preferred embodiment the anti-rotation aid has an annular base body, where the at least two shields are formed. Preferably the shields are sharpened distally, so they look like a Knife can be easily driven into the bone material.

Die proximale Arretierungshilfe zur Vermeidung einer Rotation der Anti-Rotationshilfe ist bevorzugt gebildet aus wenigstens zwei nach proximal vom ringförmigen Grundkörper abragenden Stiften, die in einen Paßsitz in wenigstens zwei im Inneren der Kappe eingelassenen Bohrungen bringbar sind. Die Anordnung der Stifte am ringförmigen Grundkörper ist kongruent mit der Anordnung der in der Kappe eingelassenen Bohrungen. Die Durchmesser der Stifte sind geringfügig größer als die Bohrungsdurchmesser, damit ein Paßsitz zustande kommen kann.The proximal locking aid for preventing rotation of the anti-rotation aid is preferably formed from at least two protruding proximally from the annular base pins, which can be brought into a snug fit in at least two recessed in the interior of the cap holes. The arrangement of the pins on the annular Grundkör per is congruent with the arrangement of the recessed holes in the cap. The diameters of the pins are slightly larger than the bore diameter, so that a snug fit can come about.

Die so erzielte Rotationssicherung der Kappe auf dem Schenkelkopfhals ist stabil genug, um die Zeitspanne, die Knochentrabekel benötigen, um in die Raumnetzstrukturen im Inneren der Kappe einzuwachsen, zu überbrücken. Nach dem vollständigen Einwachsen der Knochentrabekel in die Raumnetzstruktur und nach Herstellung der nötigen Langzeitstabilität hat die Anti-Rotationshilfe keinerlei Funktion mehr.The thus achieved rotational security of the cap on the femoral head neck is stable enough to reduce the time that bone trabeculae need to grow into the space network structures inside the cap, to bridge. To complete ingrowth the bone trabeculae into the space structure and after fabrication the necessary Long-term stability The anti-rotation aid has no more function.

Die Erfindung wird anhand der Zeichnungsfiguren beispielhaft näher erläutert. Hierbei zeigt:The The invention will be explained in more detail by way of example with reference to the drawing figures. in this connection shows:

1 eine Schnittansicht einer eine der natürlichen Gelenkkugel nachgebildeten Kappe mit einem proximal in ihrem Polbereich exakt mittig verbundenen Führungsstift sowie einer Anti-Rotationshilfe beim Auffädeln auf den Führungsstift, 1 a sectional view of one of the natural joint ball modeled cap with a proximally in its pole area exactly centered guide pin and an anti-rotation aid when threading on the guide pin,

2 das aus dem Set erstellte Gelenkkopf-Kappenimplantat im Querschnitt, und 2 the condyle cap implant created from the set in cross section, and

3 eine perspektivische und vergrößerte Ansicht der Anti-Rotationshilfe. 3 a perspective and enlarged view of the anti-rotation aid.

Nachfolgend sind gleiche Teile mit denselben Bezugszeichen versehen.following the same parts are provided with the same reference numerals.

Das Set besteht im gezeigten Ausführungsbeispiel aus mindestens einer der Form der natürlichen Gelenkkugel nachgebildeten Kappe 1 sowie aus wenigstens einem Führungsstift 2, der proximal im Polbereich der Kappe 1 exakt mittig mit dieser verbindbar ist. Die Verbindung erfolgt im gezeigten Ausführungsbeispiel durch eine Verschraubung eines Gewindebolzens 9 am Ende des Führungsstiftes 2 und einer Gewindeinnenbohrung 8 in der Kappe 1. Sämtliche Innenflächen 10 der Kappe 1, welche nach der Implantation mit dem knöchernen Schenkelkopfhals in Kontakt kommen, sind im dargestellten Ausführungsbeispiel mit einer offenmaschigen, dreidimensionalen Raumnetzstruktur 10 strukturiert, derart, dass Knochentrabekel vom Schenkelkopfhals in die Struktur und durch diese hindurch wachsen können, wodurch für eine stabile Langzeitfixation des Implantates gesorgt wird.The set consists in the illustrated embodiment of at least one of the shape of the natural joint ball replica cap 1 and at least one guide pin 2 , the proximal pole of the cap 1 exactly centered with this is connectable. The connection is made in the illustrated embodiment by a screw of a threaded bolt 9 at the end of the guide pin 2 and a threaded internal bore 8th in the cap 1 , All interior surfaces 10 the cap 1 , which come into contact after implantation with the bony femoral head neck, in the illustrated embodiment with an open-mesh, three-dimensional spatial network structure 10 structured such that bone trabeculae can grow from the femoral head neck into and through the structure, thereby providing for stable long-term fixation of the implant.

Um eine Rotation der Kappe 1 auf dem Schenkelkopfhals während der Einwachsphase der Knochentrabekel in die Raumnetzstruktur 10 zu unterbinden, ist eine Anti-Rotationshilfe 3 vorgesehen. Diese besteht (3) aus einem ringförmigen Grundkörper 5, an den die wenigstens zwei distal abragenden Schilde 4 angeformt sind. Es ist in 3 angedeutet, dass die Schilde 4 leicht keilförmig oder messerförmig ausgebildet sind, um das Eintreiben in den Knochen des Schenkelkopfhalses zu erleichtern.To a rotation of the cap 1 on the femoral head during the ingrowth phase of the bone trabeculae into the spatial network structure 10 to stop is an anti-rotation aid 3 intended. This consists ( 3 ) From an annular body 5 , to which the at least two distally protruding shields 4 are formed. It is in 3 hinted that the shields 4 are slightly wedge-shaped or knife-shaped, to facilitate the driving into the bone of the femoral neck.

Zur Realisierung der Arretierungshilfe sind an den ringförmigen Grundkörper 5 der Anti-Rotationshilfe 3 zwei nach proximal abragende Stifte 6 vorgesehen. Diese Stifte 6 werden in Bohrungen 7 im Kopf der Kappe 1 (1) versenkt. Dabei sind die Dimensionen so gewählt, dass die Stifte in den Bohrungen in einem Paßsitz rotationssichernd sitzen.To realize the locking aid are to the annular body 5 the anti-rotation aid 3 two pins protruding proximally 6 intended. These pens 6 be in drilling 7 in the head of the cap 1 ( 1 ) sunk. The dimensions are chosen so that the pins sit rotationally secure in the holes in a snug fit.

Claims (3)

Set zur Erstellung eines Gelenkkopf-Kappenimplantates für ein künstliches Hüftgelenk, aufweisend wenigstens eine der Form der natürlichen Gelenkkugel nachgebildeten Kappe (1), deren Kontaktflächen mit dem Schenkelkopfhals strukturiert sind mit einer offenmaschigen, dreidimensionalen Raumnetzstruktur (10), die auf einen teilresizierten Schenkelkopfhals (2) setzbar ist, sowie einen proximal im Polbereich der Kappe (1) exakt mittig mit dieser verbindbaren Führungsstift (2) oder Armierungskörper, gekennzeichnet durch wenigstens eine auf den Führungsstift bzw. Armierungskörper auffädelbare Anti-Rotationshilfe (3) mit wenigstens zwei nach distal abragenden, in den teilresizierten Schenkelkopfhals versenkbaren Schilden (4) sowie mit einer proximalen Arretierungshilfe (5) zur Vermeidung einer Rotation der Anti-Rotationshilfe (3) im Inneren der Kappe (1 ).Set for creating a condyle cap implant for an artificial hip joint, comprising at least one of the shape of the natural joint ball replicated cap ( 1 ) whose contact surfaces are structured with the femoral head neck with an open-mesh, three-dimensional spatial network structure ( 10 ) on a partially-resected femoral head neck ( 2 ) is settable, as well as a proximal in the pole region of the cap ( 1 ) exactly centered with this connectable guide pin ( 2 ) or Armierungskörper, characterized by at least one auffädelbare on the guide pin or Armierungskörper anti-rotation aid ( 3 ) having at least two distally projecting, in the partially resected femoral head neck retractable shields ( 4 ) and with a proximal arresting aid ( 5 ) to prevent rotation of the anti-rotation aid ( 3 ) inside the cap ( 1 ). Set nach Anspruch 1, dadurch gekennzeichnet, dass die Anti-Rotationshilfe (3) einen ringförmigen Grundkörper (5) aufweist, an dem die wenigstens zwei Schilde (4) angeformt sind.Set according to claim 1, characterized in that the anti-rotation aid ( 3 ) an annular base body ( 5 ), on which the at least two shields ( 4 ) are formed. Set nach Anspruch 2, dadurch gekennzeichnet, dass die proximale Arretierungshilfe (5) gebildet ist aus wenigstens zwei nach proximal vom ringförmigen Grundkörper (5) abragenden Stiften (6), die in einen Paßsitz in wenigstens zwei im Inneren der Kappe (1) eingelassenen Bohrungen (7) bringbar sind.Set according to claim 2, characterized in that the proximal Arretierungshilfe ( 5 ) is formed from at least two proximally from the annular body ( 5 ) projecting pins ( 6 ), which fit into at least two inside the cap ( 1 ) bores ( 7 ) are brought.
DE202005013075U 2005-08-15 2005-08-15 Head of pin joint-cap implant building set for artificial hip joint, has anti-rotation assistance with two distal plates immersible into cervical head and auxiliary component for avoiding rotation of assistance within cap Expired - Lifetime DE202005013075U1 (en)

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DE202005013075U DE202005013075U1 (en) 2005-08-15 2005-08-15 Head of pin joint-cap implant building set for artificial hip joint, has anti-rotation assistance with two distal plates immersible into cervical head and auxiliary component for avoiding rotation of assistance within cap

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006084493A2 (en) * 2005-02-08 2006-08-17 Eska Implants Gmbh & Co. Condyle cap implant for an artificial hip joint
EP1900344A3 (en) * 2006-09-15 2008-04-09 Corin Limited Resurfacing femoral head component
FR2912898A1 (en) * 2007-02-28 2008-08-29 Small Bone Innovations Interna Elbow joint prosthesis, has block laterally mounted on proximal part of humeral element, where shape of block is similar to that of condyle such that block permits to occupy space occupied by condyle, in case of ablation of condyle
WO2011044879A1 (en) * 2009-10-12 2011-04-21 Aap Implantate Ag Modular system for anchoring and positioning components of implants

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006084493A2 (en) * 2005-02-08 2006-08-17 Eska Implants Gmbh & Co. Condyle cap implant for an artificial hip joint
WO2006084493A3 (en) * 2005-02-08 2006-11-16 Eska Implants Gmbh & Co Condyle cap implant for an artificial hip joint
GB2430375A (en) * 2005-02-08 2007-03-28 Eska Implants Gmbh & Co Condyle cap implant for an artificial hip joint
GB2430375B (en) * 2005-02-08 2009-05-13 Eska Implants Gmbh & Co Femoral head cap implant for an artifical hip joint
EP1900344A3 (en) * 2006-09-15 2008-04-09 Corin Limited Resurfacing femoral head component
FR2912898A1 (en) * 2007-02-28 2008-08-29 Small Bone Innovations Interna Elbow joint prosthesis, has block laterally mounted on proximal part of humeral element, where shape of block is similar to that of condyle such that block permits to occupy space occupied by condyle, in case of ablation of condyle
WO2011044879A1 (en) * 2009-10-12 2011-04-21 Aap Implantate Ag Modular system for anchoring and positioning components of implants

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