DE2734249A1 - THIGH NECK PROSTHESIS - Google Patents

THIGH NECK PROSTHESIS

Info

Publication number
DE2734249A1
DE2734249A1 DE19772734249 DE2734249A DE2734249A1 DE 2734249 A1 DE2734249 A1 DE 2734249A1 DE 19772734249 DE19772734249 DE 19772734249 DE 2734249 A DE2734249 A DE 2734249A DE 2734249 A1 DE2734249 A1 DE 2734249A1
Authority
DE
Germany
Prior art keywords
hollow cylinder
grooves
neck prosthesis
implant
femoral neck
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
DE19772734249
Other languages
German (de)
Inventor
Dieter Dr Med Holzrichter
Peter Dipl Ing Schultz
Hans Dr Med Seiler
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Priority to DE19772734249 priority Critical patent/DE2734249A1/en
Priority to EP78100449A priority patent/EP0000549A1/en
Priority to JP9103878A priority patent/JPS5427295A/en
Priority to IT7826183A priority patent/IT7826183A0/en
Publication of DE2734249A1 publication Critical patent/DE2734249A1/en
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0054—Connecting devices for joining an upper structure with an implant member, e.g. spacers having a cylindrical implant connecting part
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/0022—Self-screwing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0066—Connecting devices for joining an upper structure with an implant member, e.g. spacers with positioning means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0069—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0069—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection
    • A61C8/0071—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection with a self-locking taper, e.g. morse taper
    • 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
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • 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
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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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    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30159—Concave polygonal shapes
    • A61F2002/30171—Concave polygonal shapes rosette- or star-shaped
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/30205—Three-dimensional shapes conical
    • A61F2002/3021—Three-dimensional shapes conical frustoconical
    • 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
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • 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
    • A61F2002/30362—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 with possibility of relative movement between the protrusion and the recess
    • A61F2002/30364—Rotation about the common longitudinal axis
    • A61F2002/30367—Rotation about the common longitudinal axis with additional means for preventing said rotation
    • 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
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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
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
    • 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
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    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
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    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30538—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
    • A61F2002/3054—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
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    • 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
    • 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
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2/02—Prostheses implantable into the body
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    • 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
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    • A61F2230/005—Rosette-shaped, e.g. star-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F2230/0067—Three-dimensional shapes conical

Description

Bayer AktiengesellschaftBayer Aktiengesellschaft

273A249273A249

Zentralbereich Patente. Marken und LizenzenCentral Patents Department. Trademarks and licenses

SOO Leverkusen. Bayerwerk Ki/ebSOO Leverkusen. Bayerwerk Ki / eb

2 a Juli 19772 a July 1977

OberschenkelhalsprotheseFemoral neck prosthesis

Die Erfindung betrifft eine Oberschenkelhalsprothese mit einem stielförmigen Implantat, das in den Oberschenkelknochen eingesetzt wird.The invention relates to a femoral neck prosthesis with a stem-shaped implant that is inserted into the femur will.

Der Hüftgelenkersatz ist in der Endoprothetik seit vielen Jahren bekannt. Es wurden zahlreiche Ausführungen entwickelt, um die Fehler der vorangegangenen Prothesen zu vermeiden.Hip replacement has been known in endoprosthetics for many years. Numerous designs have been developed to avoid the mistakes of the previous prostheses.

Die Problematik der Totalendoprothese des Hüftgelenkes ist unter verschiedenen Aspekten zu sehen· Zu den wichtigsten Aspekten gehört die Langzeitverankerung des Stieles im Knochen. Es ist bisher üblich, den Stiel mit Zement im Knochenlager zu verankern. Bei diesen zementverankerten Prothesen treten nach 5 bis 6 Jahren gehäuft Lockerungen auf. Um auch bei jüngeren Menschen, deren Lebenserwartung über der Haltbarkeit der bisherigen Prothesen und Prothesenverankerungen liegt, einen prothetischen Hüftgelenkersatz durchführen zu können, werden in Jüngster Zeit auch unterschiedlichst profilierte Stiele (z.B. Tragrippenprothese n.Prof .Mittelmeier) erprobt.Diese werden mit einem bisher nicht vermeidbaren Spiel im Knochen eingepaßt. Durch längere Entlastung des Beines werden Bewegungen des Implantates gering gehalten, um so eine knöcherne Ummauerung und Fixierung des Prothesenstieles zu erreichen· Durch das bisher nicht vermeidbare Spiel kann darüber hinausThe problem of the total endoprosthesis of the hip joint is to be seen under different aspects · One of the most important aspects is the long-term anchoring of the stem in the bone. It has hitherto been customary to anchor the stem in the bone bed with cement. Loosening of these cement-anchored prostheses occurs after 5 to 6 years. To be able to perform in younger people whose life expectancy is about the durability of the previous prostheses and prosthetic anchors, a prosthetic hip replacement, most recently, A diversity profiled stems (eg supporting prosthetic rib n.Prof .Mittelmeier) erprobt.Diese will not be a date avoidable play in the bone. By relieving the leg for a longer period of time, movements of the implant are kept to a minimum, in order to achieve a bony walling and fixation of the prosthesis stem

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die gelenkgerechte Stellung des Implantates nicht gewährleistet werden.the correct position of the implant is not guaranteed will.

Die bisherigen Verankerungsarten bringen folgende Nachteile mit sich:The previous types of anchoring have the following disadvantages:

1. Bei sofortiger Belastbarkeit zementverankerter Prothesen treten ungünstige Wechselwirkungen mit dem Gewebe auf.1. If cement-anchored prostheses are immediately resilient, unfavorable interactions with the tissue occur.

2. Zementfreie Verankerungen lassen bislang kaum die Möglichkeit des exakten, gelenkgerechten Ausrichtens zu. Das nicht vermeidbare Spiel des Implantates ermöglicht Wackelbewegungen· Dadurch bildet sich ein minderwertiges Fixationsgewebe·2. Cement-free anchors have so far hardly allowed the possibility of an exact, joint-compatible alignment. The unavoidable play of the implant allows wobbling movements · This creates an inferior Fixation tissue

Der Erfindung liegt daher die Aufgabe zugrunde» ein Implantat zu entwickeln, das zementlos und gelenkgerecht eingesetzt werden kann und sofort belastbar ist.The invention is therefore based on the object of an implant to develop that can be used without cement, in a joint-friendly manner and that is immediately resilient.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Implantat aus zwei Teilen besteht und das eine Teil als Hohlzylinder ausgebildet ist, der auf der Innenseite mit axialen Nuten und auf der Außenseite mit einem Gewinde versehen ist und am oberen Ende einen konischen Endabschnitt aufweist und daß das andere Teil als ein in den Hohlzylinder formschlüssig einsetzbarer Vollzylinder mit in die Nuten eingreifenden axialen Stegen und einer dem Endabschnitt entsprechenden konischen Erweiterung ausgebildet ist. Mittels des Außengewindes läßt sich der Hohlzylinder zementfrei und ohne Spiel bei sofortiger Belastbarkeit im Knochen verankern. Der Nuten-Steg-Fonnsohluß ermöglicht eine gelenkgerechte radiale Ausrichtung des Prothesenkopfes am oberen Ende des Vollzylinders· Durch die konische Ausbildung von Hohl- und Vollzylinder am oberen Ende wird eine Verklemmung des eingeschraubten Hohlzylinders bei Erreichen der gewünschten Endstellung bewirkt und eine Rotationsstabilität der Prothese erreicht·This object is achieved in that the The implant consists of two parts and one part is designed as a hollow cylinder, which is on the inside with axial grooves and on the outside with a thread and at the upper end a conical end portion has and that the other part as a solid cylinder that can be positively inserted into the hollow cylinder with in the grooves engaging axial webs and a conical expansion corresponding to the end portion is formed. Means Due to the external thread, the hollow cylinder can be anchored in the bone without cement and without play with immediate load-bearing capacity. The groove-web-form base enables a joint-compatible radial alignment of the prosthetic head at the upper end of the full cylinder · Due to the conical design of the hollow and Full cylinder at the upper end will jam the screwed-in hollow cylinder when the desired one is reached End position and a rotational stability of the prosthesis achieved

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Vorteilhaft sind auch auf der Außenseite des Hohlzylinders axiale Nuten mit einer Breite von 4 bis 8 mm eingefräst· Darüber hinaus ist es günstig, wenn die äußere Oberfläche des Hohlzylinders aufgerauht ist.Axial grooves with a width of 4 to 8 mm are also advantageously milled on the outside of the hollow cylinder In addition, it is advantageous if the outer surface of the hollow cylinder is roughened.

Im Laufe der Zeit kann das Knochengewebe in diese äußeren Nuten einwachsen, was eine zusätzliche Rotationsstabilisierung bewirkt.Over time, the bone tissue can grow into these outer grooves, which provides additional rotational stabilization causes.

Mit der Erfindung werden folgende Vorteile erzielt:The invention achieves the following advantages:

1. Durch die Zweiteilung der Prothese läßt sich der Kopfteil unabhängig von der Endstellung des festgeklemmten Hohlzylinders gelenkgerecht, radial ausgerichtet fixieren.1. By dividing the prosthesis into two parts, the head part can be fixed in a radially aligned manner, regardless of the end position of the clamped hollow cylinder.

2. Mittels des Gewindes läßt sich das Implantat spielfrei und damit ohne Beeinträchtigung des Fixationsgewebes verankern.2. By means of the thread, the implant can be free of play and thus without impairment of the fixation tissue anchor.

5».Das Implantat kann zementlos eingesetzt werden. Wechselwirkungen mit dem Gewebe werden ausgeschaltet.5 ». The implant can be inserted without cement. Interactions with the tissue are eliminated.

4. Die äußeren Nuten des Hohlzylinders bewirken neben dem in Endstellung verklemmenden oberen konischen Teil bei bereits fest verankerter Prothese durch einwachsendes Pixationsgewebe eine zusätzliche Rotationsstabilität·4. The outer grooves of the hollow cylinder, in addition to the upper conical part jamming in the end position, also contribute to already firmly anchored prosthesis through ingrown pixation tissue an additional rotational stability

5. Die Verankerung durch ein Gewinde vergrößert die Oberfläche des Implantates und verbessert dadurch die Haftung.5. Anchoring by means of a thread enlarges the surface of the implant and thereby improves adhesion.

6. Die spielfreie, gelenkgerechte Verankerung erweitert6. The backlash-free, joint-compatible anchoring expanded

die Anwendungsmöglichkeit von isoelastischen Werkstoffen.the application of isoelastic materials.

Im folgenden wird die Erfindung anhand eines in der Zeichnung dargestellten AusfUhrungsbelspleles näher erläutert.In the following the invention is based on one in the drawing AusfUhrungsbelspleles illustrated explained in more detail.

Es zeigen:Show it:

Figur 1 eine Draufsicht (senkrecht zur Achse des Außentelies)Figure 1 is a top view (perpendicular to the axis of the outer fabric)

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Figur 2 einen vergrößerten Querschnitt A-A gemäß Fig. 1, Figur 3 eine Draufsicht des vollzylindrischen Innenteilas» Figur 4 einen vergrößerten Querschnitt B-B gemäß Fig· 3» Figur 5 eine modifizierte Ausführung, bei der die Nuten zur radialen Fixierung an dem konischen Endabschnitt des hohlzylindrischen Außenteiles angebracht sind.FIG. 2 shows an enlarged cross-section A-A according to FIG. 1, Figure 3 is a plan view of the fully cylindrical inner part » FIG. 4 shows an enlarged cross-section B-B according to FIG. 3 »FIG. 5 shows a modified embodiment in which the grooves for radial fixation are attached to the conical end portion of the hollow cylindrical outer part.

Das hohlzylindrische Außenteil 1 (Gewindehülse gemäß Fig· I) besteht aus der geraden Hülse 2 und dem konischen Endabschnitt 3· Im Bereich der Hülse 2 ist ein Gewinde 4 (s. Fig· I und 2), z.B. M l8 χ 1,5 eingeschnitten. Außerdem sind auf der Außenseite mehrere axiale Nuten 5 mit einer Breite zwischen 1 bis 8 mm eingefräst· Die Tiefe der Nuten 5 entspricht der Gewindetiefe (u.U. auch tiefer), so daß der Gewindesteg durch die Nuten vollständig unterbrochen wird· Die Innenfläche der Hülse 2 ist mit einer Vielzahl gleichmäßig über den Umfang verteilter dreieckförmiger Nuten 6 versehen (z.B. 24 Zähne mit einem Modul von 0,5 mm).The hollow cylindrical outer part 1 (threaded sleeve according to Fig. I) consists of the straight sleeve 2 and the conical end section 3 In the area of the sleeve 2 there is a thread 4 (see Figs. 1 and 2), e.g. M l8 χ 1.5 incised. Also are on the outside Several axial grooves 5 with a width between 1 and 8 mm are milled in Grooves is completely interrupted · The inner surface of the sleeve 2 is evenly distributed over the circumference with a multitude triangular grooves 6 (e.g. 24 teeth with a module of 0.5 mm).

Der obere Endabschnitt 3 des Hohlzylinders 1 1st konisch erweitert und besitzt am oberen Rand Gewinde 7 für Arretierschrauben· The upper end section 3 of the hollow cylinder 1 is conically widened and has thread 7 on the upper edge for locking screws

Das vollzylindrische Innenteil 8 gemäß Fig· 3 und 4 besteht aus dem zylindrischen Stiel 9, der konischen Erweiterung 10 und dem Kopfansatz 11. Der Stiel 9 ist alt axialen« gleichmäßig über den Umfang verteilten dreieckigen Stegen 12 (s.Fig* 4) versehen· Die Stege 12 sind so geformt, daß sie bein Zusammenbau von Innenteil 8 und Außenteil 1 formschlüssig In die dreieckförmigen Nuten 6 eingreifen· Auf diese Weise ist das Innenteil 8 in zusammengebautem Zustand radial fixiert. Die konische Erweiterung 10 hat die gleiche Steigung wie der konische Endabschnitt 3 des Außenteiles· Die in das Gewinde 7 (Pig· 1) eingeschraubten Imbusschrauben greifen In die Ringnut 13 (Pig· 3) und sorgen für einen Preßsitz des InnenteilesThe fully cylindrical inner part 8 according to FIGS. 3 and 4 consists of the cylindrical stem 9, the conical enlargement 10 and the head attachment 11. The stem 9 is provided with triangular webs 12 (see FIG. 4) distributed evenly over the circumference. The webs 12 are shaped so that when the inner part 8 and outer part 1 are assembled, they engage positively in the triangular grooves 6. In this way, the inner part 8 is radially fixed in the assembled state. The conical extension 10 has the same slope as the tapered end portion 3 of the outer part · the screwed into the thread 7 (Pig x 1) Allen screws engage in the annular groove 13 (Pig x 3) and ensure an interference fit of the inner part

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9 im Außenteil 1. Der Kopfansatz 11 ist in üblicher Weise (s. Fig. 5) gekrümmt ausgebildet. Die Außenfläche der Hülse 2 ist aufgerauht, um ein besseres Anwachsen des Kallus zu ermöglichen. Sämtliche Teile sind aus einem Edelstahl für medizinische Anforderungen gefertigt. Eine Fertigung mit einem EmailUberzug ist ebenfalls möglich.9 in the outer part 1. The head extension 11 is in the usual way (see Fig. 5) formed curved. The outer surface of the sleeve 2 is roughened in order to allow better growth of the callus enable. All parts are made of stainless steel for medical requirements. A production with an enamel cover is also possible.

Fig. 5 zeigt eine modifizierte Ausführung· Der Endabschnitt des Hohlzylinders 1 geht hier in eine zylindrische Öffnung 14 über. Die Nuten 6 zur radialen Fixierung des vollzylindrischen Innenteiles 8 sind längs der Mantelfläche dieser zylindrischen öffnung 14 eingefräst· Der übrige Teil des Hohlzylinders 1 trägt keine Nuten. In entsprechender Weise ist das vollzylindrische Innenteil auf einem kurzen Stück 15 mit axialen Stegen 12 versehen, die fernschlüssig in die Nuten 6 eingreifen. Diese Ausführung hat sich vor allem dann bewährt, wenn man zu kleineren Dimensionen übergehen will (Reduzierung von Durchmesser und Länge des hohlzylindrischen Außenteiles).5 shows a modified embodiment. The end section of the hollow cylinder 1 goes into a cylindrical opening here 14 over. The grooves 6 for the radial fixation of the fully cylindrical inner part 8 are cylindrical along the lateral surface of this Milled opening 14 · The remaining part of the hollow cylinder 1 has no grooves. In a corresponding manner, the fully cylindrical inner part is on a short piece 15 with axial Provided webs 12 which engage in the grooves 6 remotely. This design has proven itself especially when you want to move on to smaller dimensions (reduction of diameter and length of the hollow cylindrical outer part).

Zum Einsetzen des zweiteiligen Implantates wird in den Knochen ein dem Gewinde 4 entsprechendes Muttergewinde geschnitten. Dann wird das Außenteil 1 eingeschraubt. Anschließend wird das Innenteil 8 eingesetzt und mittels der in die Gewinde eingeschraubten Imbusschrauben fixiert. Die radiale Feinverzahnung 6, 12 ermöglicht eine sehr genaue Justierung in radialer Richtung. Aufgrund der exakten Justiermöglichkeit, der stabilen Fixierung und der großen Oberfläche der Hülse 2 ist das neue Implantat allen bisher eingesetzten Prothesen überlegen.To insert the two-part implant, a nut thread corresponding to the thread 4 is cut into the bone. Then the outer part 1 is screwed in. Then the inner part 8 is inserted and fixed by means of the Allen screws screwed into the thread. The radial fine toothing 6, 12 enables very precise adjustment in the radial direction. Due to the possibility of exact adjustment, the stable fixation and the large surface area of the sleeve 2 , the new implant is superior to all previously used prostheses.

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Claims (4)

Patentansprüche: 27342A9Claims : 27342A9 Ί .Oberschenkelhalsprothese bestehend aus einem stielfönnigen Implantat, das In den Knochen eingesetzt wird, dadurch gekennzeichnet, daß das Implantat aus zwei Teilen besteht und das eine Teil als Hohlzylinder (1,2) ausgebildet 1st, der auf der Innenseite mit axialen Nuten (6) und auf der Außenseite mit einem Gewinde (4) versehen 1st und am oberen Ende einen konischen Endabschnitt (5) aufweist, und daß das andere Teil als ein In den Hohlzylinder (1) formschlüssig einsteckbarer Vollzylinder (8) mit in die Nuten eingreifenden axialen Stegen (12) und einer dem Endabschnitt entsprechenden konischen Erweiterung (10) ausgebildet ist.Ί. Femoral neck prosthesis consisting of a stem-shaped Implant which is inserted into the bone, characterized in that the implant consists of two parts and one part is designed as a hollow cylinder (1, 2) which on the inside with axial grooves (6) and on the outside with a thread (4) 1st and at the upper end has a conical end section (5), and that the other part is a solid cylinder (8) which can be positively inserted into the hollow cylinder (1) and has an axial one engaging in the grooves Web (12) and a conical enlargement (10) corresponding to the end portion is formed. 2. Oberschenkelhalsprothese nach Anspruch 1, dadurch gekennzeichnet, daß auf der Außenseite des Hohlzylinders (2) axiale Nuten mit einer Breite von 1 bis 8 mm eingefräst sind·2. femoral neck prosthesis according to claim 1, characterized in that on the outside of the hollow cylinder (2) axial grooves with a width of 1 to 8 mm are milled 2. Oberschenkelhalsprothese nach Anspruch 1 bis 2, dadurch gekennzeichnet, daß die äußere Oberfläche des Hohlzylinders (1) aufgerauht ist.2. femoral neck prosthesis according to claim 1 to 2, characterized characterized in that the outer surface of the hollow cylinder (1) is roughened. 4. Oberschenkelhalsprothese nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß der konische Endabschnitt (3) des Hohlzylinders (1) mit einer zylindrischen Öffnung (14) abgeschlossen ist, längs deren Mantelfläche die axialen Nuten (6) angeordnet sind.4. femoral neck prosthesis according to claim 1 to 5, characterized characterized in that the conical end section (3) of the hollow cylinder (1) is closed with a cylindrical opening (14), along the lateral surface of which the axial grooves (6) are arranged. Le A 16 845 - 6 - Le A 16 845 - 6 - 809886/0347809886/0347 ORIGINAL INSPECTEDORIGINAL INSPECTED
DE19772734249 1977-07-29 1977-07-29 THIGH NECK PROSTHESIS Pending DE2734249A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE19772734249 DE2734249A1 (en) 1977-07-29 1977-07-29 THIGH NECK PROSTHESIS
EP78100449A EP0000549A1 (en) 1977-07-29 1978-07-20 Endoprosthesis
JP9103878A JPS5427295A (en) 1977-07-29 1978-07-27 Internal prosthetic material
IT7826183A IT7826183A0 (en) 1977-07-29 1978-07-27 ENDOPROSTHESIS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19772734249 DE2734249A1 (en) 1977-07-29 1977-07-29 THIGH NECK PROSTHESIS

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DE2734249A1 true DE2734249A1 (en) 1979-02-08

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DE19772734249 Pending DE2734249A1 (en) 1977-07-29 1977-07-29 THIGH NECK PROSTHESIS

Country Status (4)

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EP (1) EP0000549A1 (en)
JP (1) JPS5427295A (en)
DE (1) DE2734249A1 (en)
IT (1) IT7826183A0 (en)

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Cited By (10)

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DE3312555A1 (en) * 1982-04-01 1983-10-13 Mecron Medizinische Produkte Gmbh, 1000 Berlin Knee prosthesis
DE3334058A1 (en) * 1983-09-21 1985-04-04 Ulrich Dr.-Ing. 5600 Wuppertal Witzel HIP ENDOPROTHESIS IN COMPOSITE DESIGN
US4619659A (en) * 1983-09-21 1986-10-28 Ulrich Witzel Hip endoprosthesis
DE3535158A1 (en) * 1985-10-02 1987-04-09 Gmt Medizinische Technik Gmbh SADDLE PROSTHESIS
DE3600804C1 (en) * 1986-01-14 1987-08-13 Orthoplant Endoprothetik Hip joint prosthesis with condyle connector
US4822370A (en) * 1986-01-14 1989-04-18 Orthoplant Endoprothetik Hip joint femoral prosthesis
EP0396519B1 (en) * 1989-04-25 1994-02-09 Per-Ingvar Branemark Anchor element for holding a joint component of a finger or other artificial joints
DE19940348A1 (en) * 1999-04-27 2000-11-16 Steinicke Maschinen Und Werkze Prosthesis for artificial hip joint; has neck with end section for femoral head and second end section that fits in shaft, where second end section axis intersects first end section and shaft axis
DE19940348C2 (en) * 1999-04-27 2003-04-30 Steinicke Maschinen Und Werkze Two-part endoprosthesis, especially for an artificial hip joint
DE19940348C5 (en) * 1999-04-27 2006-07-13 Steinicke Maschinen- Und Werkzeugbau Ag Two-piece endoprosthesis, especially for an artificial hip joint

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EP0000549A1 (en) 1979-02-07
JPS5427295A (en) 1979-03-01
IT7826183A0 (en) 1978-07-27

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