DE3017953A1 - ENDOPROTHESIS FOR THE FEMUR HEAD - Google Patents

ENDOPROTHESIS FOR THE FEMUR HEAD

Info

Publication number
DE3017953A1
DE3017953A1 DE19803017953 DE3017953A DE3017953A1 DE 3017953 A1 DE3017953 A1 DE 3017953A1 DE 19803017953 DE19803017953 DE 19803017953 DE 3017953 A DE3017953 A DE 3017953A DE 3017953 A1 DE3017953 A1 DE 3017953A1
Authority
DE
Germany
Prior art keywords
screw bolt
sleeve
bearing element
nut
endoprothesis
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.)
Withdrawn
Application number
DE19803017953
Other languages
German (de)
Inventor
Wolfgang Dr Schwaegerl
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.)
Sulzer AG
Original Assignee
Sulzer AG
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 Sulzer AG filed Critical Sulzer AG
Publication of DE3017953A1 publication Critical patent/DE3017953A1/en
Withdrawn legal-status Critical Current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
    • A61F2/32—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
    • 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
    • A61B17/74—Devices for the head or neck or trochanter of the femur
    • A61B17/742—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck
    • A61B17/746—Devices for the head or neck or trochanter of the femur having one or more longitudinal elements oriented along or parallel to the axis of the neck the longitudinal elements coupled to a plate opposite the 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
    • 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
    • A61F2/28—Bones
    • A61F2002/2825—Femur
    • A61F2002/2832—Femoral neck
    • 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
    • A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
    • 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
    • A61F2002/30451—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
    • 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
    • A61F2002/30589—Sealing means
    • 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
    • A61F2002/3621—Heads or epiphyseal parts of femur pierced with a longitudinal bore
    • 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
    • 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
    • A61F2220/0041—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws
    • 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
    • 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
    • A61F2220/0058—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
    • 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
    • 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
    • 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
    • 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
    • A61F2310/00179—Ceramics or ceramic-like structures

Abstract

In order to avoid metal abrasion and crevice corrosions between the screw bolt (3) supported with pre-stress on a trochanter plate, and a sleeve (7) surrounding it, a plastic bearing element (13), preferably made of polyethylene, is inserted between the screw bolt (3) and the sleeve (7), the bearing element being compressed by the pre-stress present between the screw bolt (3) and the sleeve (7). <IMAGE>

Description

P. 5446/Wg/ISP. 5446 / Wg / IS

Gebrüder Sulzer, Aktiengesellschaft, Winterthur/Schweiz Endoprothese für den FemurkopfSulzer Brothers, Aktiengesellschaft, Winterthur / Switzerland Endoprosthesis for the femoral head

Die Erfindung betrifft eine Endoprothese für den Femurkopf eines menschlichen Hüftgelenkes, bei der der Femurkopf mit Hilfe eines Schraubenbolzens und einer Mutter auf den Schenkelhals gezogen wird, wobei der Schraubenbolzen mindestens teilweise in einer Hülse durch den Schenkelhals hindurchgeführt und mit Hilfe einer Trochanterplatte abgestützt ist.The invention relates to an endoprosthesis for the femoral head of a human hip joint, in which the femoral head with With the help of a screw bolt and a nut, it is pulled onto the femoral neck, the screw bolt at least partially passed in a sleeve through the femoral neck and supported with the help of a trochanteric plate is.

Endoprothesen der genannten Art sind bekannt (z. B. US-PS 2,612,159; 2,682,265). Je nach dem Grad der Verletzung oder Zerstörung des natürlichen Knochengewebes dienen derartige Prothesen der Osteosynthese als kappenförmige Prothesenschalen oder als Ersatz des vollständigen Femurkopfes. Bei den genannten Implantaten kommt es bei den wechselnden Belastungen zu Relativbewegungen zwischen dem Schraubenbolzen und seiner Abstützung bzw. seiner Führungshülse, obwohl zwischen beiden Elementen eine Vorspannung vorhanden ist. Diese Relativbewegungen erzeugen mechanischen Abrieb und Verschleiss, sofern Schraubenbolzen und Hülsen - wie bei den meisten Prothesen üblich - aus Metall gefertigt sind.Endoprostheses of the type mentioned are known (e.g. US Pat. No. 2,612,159; 2,682,265). Depending on the degree of injury or Such osteosynthesis prostheses serve as cap-shaped prosthesis shells to destroy the natural bone tissue or as a replacement for the entire femoral head. at With the implants mentioned, the changing loads lead to relative movements between the screw bolts and its support or its guide sleeve, although there is a bias between the two elements. These relative movements generate mechanical abrasion and wear, provided that screw bolts and sleeves - as with the most prostheses common - are made of metal.

Da darüberhinaus zwischen diesen Teilen immer ein kleiner Spalt vorhanden ist, in den Körperflüssigkeiten eindringen können, besteht in diesem Spalt darüberhinaus die Gefahr von Spaltkorrosionen.In addition, since there is always a small gap between these parts, body fluids can penetrate there is also the risk of crevice corrosion in this gap.

Aufgabe der Erfindung ist es, die Verankerung bzw. Abstützung des Schraubenbolzens im Knochen bzw. in der Hülse oder der Trochanterplatte so auszugestalten, dass sowohl der mechanische Abrieb als auch Spaltkorrosionen zwischen den beiden Metallteilen verhindert werden. Die Lösung dieser Aufgabe erfolgtThe object of the invention is to anchor or support the screw bolt in the bone or in the sleeve or the Design the trochanteric plate so that both mechanical abrasion and crevice corrosion between the two metal parts be prevented. This task is solved

0300S7/06160300S7 / 0616

30178533017853

erfindungsgemäss dadurch, dass zwischen dem Schraubenbolzen und der Hülse ein Kunststoff-Lagerelement vorgesehen ist, das durch den Zug des Schraubenbolzens zusammengedrückt ist.according to the invention in that between the screw bolt and a plastic bearing element is provided for the sleeve, which is compressed by the pull of the screw bolt.

Auf diese Weise werden die Relativbewegungen von dem Lagerelement aufgenommen, so dass zwischen den Metallkörpern kein Spiel mehr vorhanden ist und kein mechanischer Verschleiss mehr auftritt. Als Folge des Zusammenpressen beginnt das Lagerelement, das vorzugsweise aus Polyäthylen der Klassifikationen HDPE (High density polyaethylen) oder UHMW (Ultra High Molekular Weight) besteht, sich elastisch zu verformen oder sogar plastisch zu fliessen; es dringt dabei in den erwähnten Spalt zwischen Schraubenbolzen und Hülse ein. Dadurch wird auch in diesem Spalt ein direkter Kontakt zwischen Schraubenbolzen und Hülse verhindert und darüberhinaus ein Eindringen von Körperflüssigkeit in den Spalt vermieden.In this way, the relative movements are absorbed by the bearing element, so that there is no between the metal bodies There is no longer any play and mechanical wear and tear no longer occurs. As a result of the compression, that begins Bearing element, which is preferably made of polyethylene of the classifications HDPE (High Density Polyethylene) or UHMW (Ultra High Molecular Weight) consists of elastically deforming or even flowing plastically; it penetrates into those mentioned There is a gap between the screw bolt and the sleeve. As a result, there is direct contact between in this gap as well Prevents screw bolts and sleeve and, moreover, prevents body fluid from penetrating into the gap.

Reizungen der den Femur umgebenden Weichteile durch die bei Belastungen des Femurkopfes auftretenden Mikrobewegungen des Schraubenbolzens können verhindert werden, wenn das Lagerelement in einen hülsenartigen Ansatz der Trochanter- · platte eingebettet ist, in dem das gewindetragende Ende des Schraubenbolzens und die Mutter versenkt sind.Irritation of the soft tissues surrounding the femur from the Micro-movements of the screw bolt that occur when the femoral head is loaded can be prevented if the Bearing element is embedded in a sleeve-like extension of the trochanter plate, in which the thread-bearing end of the Screw bolt and nut are countersunk.

Im folgenden wird die Erfindung anhand eines Ausführungsbeispiels im Zusammenhang mit der Zeichnung näher erläutert.The invention is explained in more detail below using an exemplary embodiment in conjunction with the drawing.

Fig. 1 zeigt - teilweise im Schnitt - die Erfindung an einer kappenartigen Prothesenschale für denFig. 1 shows - partially in section - the invention on a cap-like prosthesis shell for the

Femurkopf;Femoral head;

Fig. 2 gibt vergrössert ebenfalls in einem Schnitt als Detail aus Fig. 1 die Lagerung des gewindetragenden Endes des Schraubenbolzens in einer Hülse der Trochanterplatte wieder.FIG. 2 also shows, enlarged, in a section as a detail from FIG. 1, the mounting of the thread-bearing End of the screw bolt in a sleeve of the trochanteric plate again.

Eine käppenartige Prothese 1 für den Gelenkkopf, die aus Metall oder Biokeramik gefertigt ist, ist auf den operativA cap-like prosthesis 1 for the joint head, which consists of Metal or bio-ceramic is made on the operational

030067/0616030067/0616

vorbereiteten Femurknochen 2 aufgesetzt. Sie wird durch einen Schraubenbolzen 3, dessen Kopf 4 in bekannter Weise unter Zwischenlegen einer gefangenen Dichtung 5 aus Polyäthylen in einer zentralen Bohrung 6 der Prothese abgestützt ist, auf dem Knochen unter Vorspannung gehalten, wobei der aus einem körperverträglichen Metall bestehende Schraubenbolzen 3 als Zuganker wirkt.prepared femur bone 2 placed on top. She is going through a screw bolt 3, the head 4 of which in a known manner with the interposition of a captured seal 5 made of polyethylene is supported in a central bore 6 of the prosthesis, held on the bone under pretension, the Screw bolts 3 consisting of a metal compatible with the body acts as a tie rod.

Das Widerlager für den "Zuganker" bildet eine metallische Hülse 7, die an eine, ebenfalls aus Metall bestehende Trochanterplatte 8 angeschweisst ist. Die Trochanterplatte kann, wie allgemein üblich, durch nicht gezeigte Schrauben, die durch Bohrungen 9 gesteckt werden, mit dem Femur 2 verschraubt werden.The abutment for the "tie rod" forms a metallic sleeve 7, which is also made of metal Trochanteric plate 8 is welded. As is common practice, the trochanteric plate can be secured by screws (not shown) which are inserted through holes 9 are screwed to the femur 2.

An seinem unteren Ende trägt der Schraubenbolzen 3 ein Gewinde 10 (Fig. 2), auf das eine Mutter 11 geschraubt ist; diese zieht den Schraubenbolzen 3 nach unten und presst damit die Prothesenschale 1 auf den Femurhals. Die Mutter 11 drückt dabei über eine, wiederum aus Metall bestehende Zwischenscheibe 12 erfindungsgemäss ein Kunststoff-Lagerelement 13 gegen das konisch zulaufende Ende der Hülse 7. Wie bereits beschrieben, verformt sich das Lagerelement 13 unter dem Druck der Vorspannung und schiebt sich - sich elastisch oder plastisch verformend - zwischen die Metallteile und verhindert so Abrieb und Verschleiss, sowie das Eindringen von Körperflüssigkeit in den Spalt 14.At its lower end, the screw bolt 3 has a thread 10 (FIG. 2) onto which a nut 11 is screwed; this pulls the screw bolt 3 downwards and thus presses the prosthesis shell 1 onto the femoral neck. The nut 11 presses in this case a plastic bearing element 13 according to the invention via an intermediate disk 12 again made of metal against the tapered end of the sleeve 7. As already described, the bearing element 13 deforms under the pressure of the preload and pushes - elastic or plastically deforming - between the metal parts and thus prevents abrasion and wear, as well as the penetration of Body fluid in the gap 14.

030087/0616030087/0616

Claims (2)

PatentansprücheClaims ( iJ Endoprothese für den Femurkopf eines menschlichen Hüftgelenkes, bei der der Femurkopf mit Hilfe eines Schraubenbolzens und einer Mutter auf den Schenkelhals gezogen wird, wobei der Schraubenbolzen mindestens teilweise in einer Hülse durch den Schenkelhals hindurchgeführt und mit Hilfe einer Trochanterplatte abgestützt ist, dadurch gekennzeichnet, dass zwischen dem Schraubenbolzen (3) und der Hülse (7) ein Kunststoff-Lagerelement (13) vorgesehen ist, das durch den Zug des Schraubenbolzens (3) zusammengedrückt ist.(iJ endoprosthesis for the femoral head of a human hip joint, in which the femoral head is pulled onto the femoral neck with the help of a screw bolt and a nut, wherein the screw bolt is passed at least partially in a sleeve through the femoral neck and with the help a trochanteric plate is supported, characterized in that between the screw bolt (3) and the Sleeve (7) a plastic bearing element (13) is provided, which is compressed by the pull of the screw bolt (3) is. 2. Endoprothese nach Anspruch 1, dadurch gekennzeichnet, dass das Lagerelement (13) in einen hülsenartigen Ansatz (7) der Trochanterplatte (8) eingebettet ist, in dem das gewindetragende Ende (10) des Schraubenbolzens (3) und die Mutter (11) versenkt sind.2. Endoprosthesis according to claim 1, characterized in that that the bearing element (13) is embedded in a sleeve-like extension (7) of the trochanteric plate (8) in which the threaded end (10) of the screw bolt (3) and the nut (11) are countersunk. 030067/0616030067/0616
DE19803017953 1979-08-07 1980-05-10 ENDOPROTHESIS FOR THE FEMUR HEAD Withdrawn DE3017953A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH722279A CH638391A5 (en) 1979-08-07 1979-08-07 Endoprosthesis for the head of the femur

Publications (1)

Publication Number Publication Date
DE3017953A1 true DE3017953A1 (en) 1981-02-12

Family

ID=4321780

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803017953 Withdrawn DE3017953A1 (en) 1979-08-07 1980-05-10 ENDOPROTHESIS FOR THE FEMUR HEAD

Country Status (2)

Country Link
CH (1) CH638391A5 (en)
DE (1) DE3017953A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538346A1 (en) * 1985-10-29 1987-05-07 Ingo Kliefoth HIP JOINT PROSTHESIS AND METHOD AND DEVICE FOR YOUR IMPLANTATION
EP0502815A1 (en) * 1991-03-07 1992-09-09 SULZER Medizinaltechnik AG Nut for threaded connection in an implant
AT398529B (en) * 1991-01-25 1994-12-27 Winkler Heinz Dr ENDOPROTHESIS, ESPECIALLY THE HIP JOINT
EP0728449A2 (en) * 1995-02-22 1996-08-28 Francesco Caracciolo Anatomic hip prosthesis
DE19601340C1 (en) * 1996-01-16 1997-06-05 Eska Implants Gmbh & Co Endoprosthesis for neck of femur for artificial hip joint
DE19610741C1 (en) * 1996-03-20 1997-11-20 Eska Implants Gmbh & Co Internal locking prosthesis for artificial hip-joint
WO2000006054A3 (en) * 1998-07-30 2000-07-13 Aap Implantate Ag Femoral neck endoprosthesis for an artificial hip joint
DE19904126A1 (en) * 1999-02-03 2000-08-10 Ceramtec Ag Hip endoprosthesis in which at least the articulation surface of the femoral head is replaced
DE10021387A1 (en) * 2000-05-03 2001-11-22 Giorgio E Curradini Femur cap has spherical outer surface with opening, cavity in spherical segment, and opening
DE10120331A1 (en) * 2001-04-26 2002-11-21 Ulrich Muender Endoprosthesis of two femur implant elements, with sleeve and medullar rod, hip joint head, conical adapter and ellipsoid metal plate
WO2003043543A1 (en) * 2001-11-22 2003-05-30 Eska Implants Gmbh & Co. Femoral neck endoprosthesis for an artificial hip joint
US6616697B2 (en) 2001-03-13 2003-09-09 Nicholas G. Sotereanos Hip implant assembly
EP1745754A1 (en) 2005-07-20 2007-01-24 Prévôt, Bertrand Dr. Med. Trochanter Plate
WO2007066156A1 (en) * 2005-12-05 2007-06-14 Ioannis Vlachos Hip resurfacing implant

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3538346A1 (en) * 1985-10-29 1987-05-07 Ingo Kliefoth HIP JOINT PROSTHESIS AND METHOD AND DEVICE FOR YOUR IMPLANTATION
AT398529B (en) * 1991-01-25 1994-12-27 Winkler Heinz Dr ENDOPROTHESIS, ESPECIALLY THE HIP JOINT
EP0502815A1 (en) * 1991-03-07 1992-09-09 SULZER Medizinaltechnik AG Nut for threaded connection in an implant
US5330535A (en) * 1991-03-07 1994-07-19 Sulzer Brothers Limited Screw-nut for screwing implants together
EP0728449A2 (en) * 1995-02-22 1996-08-28 Francesco Caracciolo Anatomic hip prosthesis
EP0728449A3 (en) * 1995-02-22 1998-04-22 Francesco Caracciolo Anatomic hip prosthesis
DE19601340C1 (en) * 1996-01-16 1997-06-05 Eska Implants Gmbh & Co Endoprosthesis for neck of femur for artificial hip joint
US5766263A (en) * 1996-01-16 1998-06-16 Eska Implants Gmbh & Co. Femur endoprosthesis for artificial hip joint
DE19610741C1 (en) * 1996-03-20 1997-11-20 Eska Implants Gmbh & Co Internal locking prosthesis for artificial hip-joint
US6383227B1 (en) * 1998-07-30 2002-05-07 Aap Implanters Ag Femoral neck endoprosthesis for an artificial hip joint
WO2000006054A3 (en) * 1998-07-30 2000-07-13 Aap Implantate Ag Femoral neck endoprosthesis for an artificial hip joint
DE19904126A1 (en) * 1999-02-03 2000-08-10 Ceramtec Ag Hip endoprosthesis in which at least the articulation surface of the femoral head is replaced
DE10021387A1 (en) * 2000-05-03 2001-11-22 Giorgio E Curradini Femur cap has spherical outer surface with opening, cavity in spherical segment, and opening
DE10021387C2 (en) * 2000-05-03 2002-09-12 Giorgio E Curradini Cap to be placed on the femoral femoral head
US6616697B2 (en) 2001-03-13 2003-09-09 Nicholas G. Sotereanos Hip implant assembly
DE10120331A1 (en) * 2001-04-26 2002-11-21 Ulrich Muender Endoprosthesis of two femur implant elements, with sleeve and medullar rod, hip joint head, conical adapter and ellipsoid metal plate
WO2003043543A1 (en) * 2001-11-22 2003-05-30 Eska Implants Gmbh & Co. Femoral neck endoprosthesis for an artificial hip joint
DE10158559A1 (en) * 2001-11-22 2003-06-26 Eska Implants Gmbh & Co Femoral neck endoprosthesis for an artificial hip joint
DE10158559C2 (en) * 2001-11-22 2003-10-09 Eska Implants Gmbh & Co Femoral neck endoprosthesis for an artificial hip joint
EP1745754A1 (en) 2005-07-20 2007-01-24 Prévôt, Bertrand Dr. Med. Trochanter Plate
WO2007066156A1 (en) * 2005-12-05 2007-06-14 Ioannis Vlachos Hip resurfacing implant
US8632602B2 (en) 2005-12-05 2014-01-21 Ioannis Vlachos Hip resurfacing implant

Also Published As

Publication number Publication date
CH638391A5 (en) 1983-09-30

Similar Documents

Publication Publication Date Title
DE2724234C2 (en) Joint end prosthesis
DE2724040C3 (en) Cap-like endoprosthesis for the femoral head
DE3017953A1 (en) ENDOPROTHESIS FOR THE FEMUR HEAD
DE10328949A1 (en) hip joint
CH637286A5 (en) ARTIFICIAL JOINT FOR IMPLANTING ON HUMAN BODY.
CH632923A5 (en) Implant for partial replacement of a sliding surface of a human joint
DE2641770B2 (en) Intermediate fabric-absorbing cuff for a metallic hip prosthesis socket
DE3334058A1 (en) HIP ENDOPROTHESIS IN COMPOSITE DESIGN
CH673765A5 (en)
DE4009360A1 (en) KNEE-ENDOPROTHESIS
CH426096A (en) Hip joint prosthesis
EP1093777A2 (en) Shoulder-endoprosthesis
DE2839661A1 (en) COMPLETE HIP JOINT ENDOPROSTHESIS
EP0878176B1 (en) Femoral neck endoprosthesis for an artificial hip joint
DE10329076A1 (en) hip joint
CH678595A5 (en)
DE19610741C1 (en) Internal locking prosthesis for artificial hip-joint
EP0119321B1 (en) Hip joint cup
EP0144588A2 (en) Hip joint cup
DE2931750C2 (en) One-piece thigh part of a hip joint endoprosthesis
DE2623560A1 (en) PROSTHESIS, IN PARTICULAR THIGH PROSTHESIS
DE3737372A1 (en) IMPLANTABLE hip joint prosthesis
DE19502503C1 (en) Modular bone implant with cup and pins
DE3840471A1 (en) Prosthetic components as replacement for the joint surfaces of the femoral head
EP1446076B1 (en) Femoral neck endoprosthesis for an artificial hip joint

Legal Events

Date Code Title Description
OD Request for examination
8130 Withdrawal