DE202006000845U1 - Setting instrument for making conical joint between modular parts has casing, driving piston with piston rod, tensioning device and actuating device whereby at second end of driving piston, an impulse directing device is arranged - Google Patents

Setting instrument for making conical joint between modular parts has casing, driving piston with piston rod, tensioning device and actuating device whereby at second end of driving piston, an impulse directing device is arranged Download PDF

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Publication number
DE202006000845U1
DE202006000845U1 DE200620000845 DE202006000845U DE202006000845U1 DE 202006000845 U1 DE202006000845 U1 DE 202006000845U1 DE 200620000845 DE200620000845 DE 200620000845 DE 202006000845 U DE202006000845 U DE 202006000845U DE 202006000845 U1 DE202006000845 U1 DE 202006000845U1
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Prior art keywords
piston
setting instrument
impulse
driving piston
housing body
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Expired - Lifetime
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DE200620000845
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German (de)
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AQ IMPLANTS GMBH, DE
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Eska Implants GmbH and Co KG
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Priority to DE200620000845 priority Critical patent/DE202006000845U1/en
Publication of DE202006000845U1 publication Critical patent/DE202006000845U1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4607—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of hip femoral endoprostheses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
    • B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
    • 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
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30505—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism spring biased
    • 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
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30546—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting elasticity, flexibility, spring rate or mechanical tension
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • 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
    • A61F2002/30601—Special structural features of bone or joint prostheses not otherwise provided for telescopic
    • 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
    • A61F2002/365—Connections of heads to necks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4681—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by applying mechanical shocks, e.g. by hammering
    • 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
    • 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
    • A61F2220/0033—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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0004—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable
    • A61F2250/0012—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof adjustable for adjusting elasticity, flexibility, spring rate or mechanical tension

Abstract

The setting instrument has a casing (1), a driving piston (3) with a piston rod (2), a tensioning device (4) which is linked with the piston. An actuating device (5) is also present and a positioning device (6) regulates the stress of the tensioning device. An impact base (7) locks the casing and at the second end of driving piston, an impulse directing device (8) is also arranged.

Description

Die vorliegende Erfindung betrifft ein Setzinstrument zur Herstellung einer konischen Klemmverbindung zwischen Teilen eines endoprothetischen Implantates mit definierter und reproduzierbarer Klemmwirkung.The The present invention relates to a setting instrument for manufacturing a conical clamping connection between parts of an endoprosthetic implant with defined and reproducible clamping action.

Die konische Klemmverbindung ist seit längerem eine Standardverbindung in der Endoprothetik. Implantatteile, die nach dem Zusammenbau ein modulares Implantat ergeben, weisen für die Klemmverbindung auf der einen Seite einen konischen Klemmzapfen und das andere Implantatteil eine konische Klemmhülse auf. Der konische Klemmzapfen wird in die konische Klemmhülse gesteckt und mit einem Schlag durch den Operateur darin fixiert.The conical clamping connection has long been a standard connection in endoprosthetics. Implant parts that are modular after assembly Implant give, show for the clamp connection on the one hand a conical clamping pin and the other implant part on a conical clamping sleeve. The conical clamping pin is inserted into the conical clamping sleeve and fixed in one stroke by the surgeon.

Untersuchungen haben ergeben, dass die Operateure sehr unterschiedliche Klemmverbindungen herstellen, was die Fixationskraft anbelangt. Dies ist darauf zurückzuführen, dass Operateure unterschiedlich starke Schläge auf das Implantatteil ausüben, welches mit dem anderen Implantatteil verbunden werden soll. Die Bandbreite liegt hier typischerweise zwischen 0,5 kN und 10 kN.investigations have shown that the operators have very different clamping connections produce, as far as the fixation force. This is due to the fact that Operators exercise different strong blows on the implant part, which to be connected to the other implant part. The bandwidth here is typically between 0.5 kN and 10 kN.

Eine zu schwache Verbindung kann in Abhängigkeit von der Art des Implantates ein Quietschen eines Gelenkes verursachen, eine Extension oder Vibration. Dies ist aus medizinischer und technischer Sicht nicht tolerabel.A too weak connection may depend on the type of implant cause a squeaking of a joint, an extension or vibration. This is not tolerable from a medical and technical point of view.

Wünschenswert wäre ein Instrument, mit welchem eine definierte und reproduzierbare Klemmwirkung zwischen den Implantatteilen, respektive der Klemmhülse und dem Klemmzapfen erzeugt werden könnte.Desirable would be a Instrument with which a defined and reproducible clamping action between the implant parts, respectively the clamping sleeve and could be generated to the clamping pin.

Dementsprechend ist es die Aufgabe der vorliegenden Erfindung, ein derartiges Setzinstrument anzugeben.Accordingly It is the object of the present invention, such a setting instrument specify.

Gelöst wird diese Aufgabe durch das Setzinstrument mit den Merkmalen des Anspruchs 1. Vorteilhafte Weiterbildungen ergeben sich aus den Unteransprüchen.Is solved this object by the setting instrument with the features of the claim 1. Advantageous developments emerge from the dependent claims.

Demgemäß weist das Setzinstrument auf:

  • – einen Gehäusekörper,
  • – einen im Inneren des Gehäusekörpers an einer Kolbenstange geführten Schlagkolben,
  • – eine Spannvorrichtung am ersten Ende des Gehäusekörpers, mittels der der Schlagkolben vorgespannt werden kann,
  • – eine Auslösevorrichtung für den vorgespannten Schlagkolben,
  • – eine Einstellvorrichtung zum Vorwählen der Spannkraft der Spannvorrichtung,
  • – ein den Gehäusekörper am zweiten Ende abschließenden Schlagboden, auf welchem der vorgespannte Schlagkolben nach Auslösen der Auslösevorrichtung mit definiertem Impuls aufschlägt, und
  • – eine Impulsleitvorrichtung, welche den Impuls an ein Implantatteil weiterleitet.
Accordingly, the setting instrument has:
  • A housing body,
  • A percussion piston guided on a piston rod inside the housing body,
  • A tensioning device at the first end of the housing body, by means of which the striking piston can be prestressed,
  • A triggering device for the prestressed percussion piston,
  • An adjusting device for preselecting the clamping force of the clamping device,
  • - A the housing body at the second end final beat base on which the preloaded percussion piston strikes after triggering the triggering device with a defined pulse, and
  • - A Impulsleitvorrichtung, which forwards the pulse to an implant part.

Der Schlagkolben wirkt also nicht direkt auf das eine Implantatteil ein. Dies könnte anderenfalls aufgrund einer direkten Einwirkung des Schlagkolbens beschädigt werden. Beim erfindungsgemäßen Setzinstrument wird lediglich der vom Schlagkolben auf den Schlagboden übertragene Impuls weitergeleitet, so dass also keine direkte Berührung zwischen Schlagkolben und Implantatteil stattfindet.Of the Impact piston thus does not act directly on the one implant part one. this could otherwise due to a direct action of the percussion piston damaged become. When setting tool according to the invention only the one transmitted from the percussion piston to the beat floor Pulse relayed so that no direct contact between percussion piston and implant part takes place.

Gemäß einer bevorzugten Ausführungsform weist die Impulsleitvorrichtung ein der Form des zu verbindenden Implantatteils angepasstes Formteil auf. Im Falle beispielsweise einer Hüftgelenkskugel, die mit einem Hüftstiel zu verbinden ist, weist das Formteil eine entsprechende Aufnahme für die Gelenkkugel auf. Vorteilhaft ist das Formteil austauschbar gegen andere Formteile für andere Implantatteile. Dann kann nämlich das Setzinstrument universell eingesetzt werden.According to one preferred embodiment the Impulsleitvorrichtung one of the shape of the implant part to be connected adapted molding on. In the case of, for example, a hip ball, the with a hip stalk is to connect, the molding has a corresponding receptacle for the Joint ball on. Advantageously, the molding is exchangeable against other moldings for other implant parts. Then, in fact, the setting tool can be used universally become.

In besonders bevorzugter und einfacher Ausführung ist die Spannvorrichtung als Druckfeder ausgebildet. Diese Ausführungsform ist besonders kostengünstig.In Particularly preferred and simple design is the clamping device designed as a compression spring. This embodiment is particularly inexpensive.

Die Auslösevorrichtung ist bevorzugt als federkraftbelasteter Auslöseknopf ausgebildet. In gespanntem Zustand der Spannvorrichtung rastet der Auslöseknopf entsprechend ein. Auf seine Betätigung hin schnellt der Auslöseknopf aufgrund der Federbelastung in seine Ausgangsstellung zurück und der Schlagkolben schnellt in Richtung Schlagboden.The triggering device is preferably designed as a spring-loaded release button. In tense Condition of the clamping device engages the release button accordingly. On his activity The quick release button will rock due to the spring load back to its original position and the The flare beats faster in the direction of Schlagboden.

Gemäß einer noch weiteren Ausführungsform weist die Impulsleitvorrichtung zwischen dem Schlagboden und dem Formteil ein starres Übergangsstück auf. Das starre Übergangsstück leitet den in den Schlagboden eingeleiteten Impuls weiter hin zu dem Formteil.According to one yet another embodiment has the Impulsleitvorrichtung between the impact floor and the Molded on a rigid transition piece. The rigid transition piece directs the in the impact floor initiated pulse further towards the molding.

Die Einstellvorrichtung zum Vorwählen der Spannkraft der Spannvorrichtung kann beispielsweise ein Gewinde sein, mittels dessen eine Mutter auf ein Außengewinde geschraubt wird, wobei zwischen Schlagkolben und der Mutter die Spannfeder gelagert ist. Je nach Eindrehtiefe wird die Feder stärker oder schwächer vorgespannt.The Setting device for selecting the clamping force of the clamping device, for example, a thread be by means of which a nut is screwed onto an external thread, wherein stored between percussion piston and the nut, the tension spring is. Depending on the depth of insertion, the spring is biased stronger or weaker.

Als besonders günstig für einen stabilen konische Klemmsitz hat sich eine Klemmkraft von 4,5 kN erwiesen.When very cheap for one stable conical clamping seat has a clamping force of 4.5 kN proved.

Die Erfindung wird anhand der einzigen Zeichnungsfigur näher erläutert. Diese zeigt schematisch eine Schnittansicht durch das gesamte Setzinstrument.The invention is based on the single Drawing figure explained in more detail. This shows schematically a sectional view through the entire setting instrument.

Zunächst weist das Setzinstrument einen Gehäusekörper 1 auf, vorliegend mit geschlitzter Wandung. Im Inneren des Gehäusekörpers 1 befindet sich ein Schlagkolben 3, der mit einer Kolbenstange 2 verbunden ist, welche den Kolben im Inneren des Gehäusekörpers 1 führt. Die Kolbenstange 2 führt durch eine Durchbohrung in dem Abschlussstück 6 hindurch und ist mit einem Kugelknauf 11 abgeschlossen.First, the setting instrument has a housing body 1 on, in this case with slotted wall. Inside the case body 1 there is a percussion piston 3 that with a piston rod 2 is connected, which the piston inside the housing body 1 leads. The piston rod 2 passes through a through hole in the end piece 6 through and is with a ball knob 11 completed.

Das Abschlussstück ist als Einstellvorrichtung 6 ausgebildet und weist ein Außengewinde auf, welches mit einem Innengewinde im Gehäusekörper 1 verschraubt ist. Zwischen dem Schlagkolben 3 und der Einstellvorrichtung 6 ist eine Druckfeder 4 als Spannvorrichtung angeordnet. Je nach Eindrehtiefe der Einstellvorrichtung 6 in den Gehäusekörper 1 wird die Feder 4 vorgespannt. Dadurch wird die Impulsstärke eingestellt, welche vom Schlagkolben 3 in den Gehäusekörper 1 abschließenden Schlagkörper 7 einleitet. An den Schlagboden 7 ist eine Impulsleitvorrichtung 8 angekoppelt, welches vorliegend als starres Übergangsstück 13 ausgebildet ist. An das Übergangsstück 13 ist ein Formteil 12 angekoppelt, welches der Form des zu verbindenden Implantatteils angepasst ist. Dargestellt ist ein Formteil 12 für eine Gelenkkugel für ein künstliches Hüftgelenk.The end piece is as an adjustment 6 formed and has an external thread, which with an internal thread in the housing body 1 is screwed. Between the percussion piston 3 and the adjustment device 6 is a compression spring 4 arranged as a clamping device. Depending on the depth of insertion of the adjustment 6 in the housing body 1 becomes the spring 4 biased. This adjusts the pulse strength of the percussion piston 3 in the housing body 1 final impactor 7 initiates. To the beat floor 7 is a Impulsleitvorrichtung 8th coupled, which in this case as a rigid transition piece 13 is trained. To the transition piece 13 is a molding 12 coupled, which is adapted to the shape of the implant part to be connected. Shown is a molding 12 for a joint ball for an artificial hip joint.

Am anderen Ende ist eine Auslösevorrichtung 5 vorgesehen, welche als federbelasteter Auslöseknopf 9 ausgebildet ist. Die Federbelastung führt von einer kleinen Druckfeder 10 her.At the other end is a triggering device 5 provided, which as a spring-loaded release button 9 is trained. The spring load leads from a small compression spring 10 ago.

Zum Spannen des Setzinstrumentes zieht der Operateur die Kolbenstange 2 am Kugelknauf 11 in der Zeichnung nach rechts bis der Auslöseknopf 9 in einer Ausnehmung in der Kolbenstange 2 einrastet. Das Gerät ist in diesem Zustand einsatzbereit. Die Stärke des Impulses, welcher in den Schlagboden 7 eingeleitet werden soll, wird sodann – sofern noch nicht geschehen – durch Drehung des Abschlussstückes 6 in den Gehäusekörper 1 eingestellt.To clamp the setting instrument, the surgeon pulls the piston rod 2 on the ball knob 11 in the drawing to the right until the release button 9 in a recess in the piston rod 2 locks. The device is ready for use in this state. The strength of the impulse, which in the beat floor 7 is to be initiated, then - if not already done - by turning the end piece 6 in the housing body 1 set.

Beim Einsatz des Instrumentes wird der Auslöseknopf 9 betätigt, derart, dass die Kolbenstange frei gesetzt wird, so dass der Schlagkolben 3 aufgrund der Federkraft der Druckfeder 4 im Bild nach links schnellt und auf den Schlagboden 7 schlägt. Der so erzeugte Impuls wird über die Impulsleitvorrichtung 8 in das Formteil 12 eingeleitet, welches den Impuls weitergibt an das (nicht dargestellte) Implantatteil.When using the instrument, the trigger button 9 operated, such that the piston rod is released, so that the percussion piston 3 due to the spring force of the compression spring 4 in the picture to the left and on the Schlagboden 7 suggests. The pulse thus generated is via the Impulsleitvorrichtung 8th in the molding 12 initiated, which passes on the pulse to the (not shown) implant part.

Claims (5)

Setzinstrument zur Herstellung einer konischen Klemmverbindung zwischen Teilen eines endoprothetischen Implantates mit definierter und reproduzierbarer Klemmwirkung, aufweisend: – einen Gehäusekörper (1), – einen im Inneren des Gehäusekörpers (1) an einer Kolbenstange (2) geführten Schlagkolben (3), – eine Spannvorrichtung (4) am ersten Ende des Gehäusekörpers (1), mittels der der Schlagkolben (3) vorgespannt werden kann, – eine Auslösevorrichtung (5) für den vorgespannten Schlagkolben (3), – eine Einstellvorrichtung (6) zum Vorwählen der Spannkraft der Spannvorrichtung (4), – ein den Gehäusekörper (1) am zweiten Ende abschließenden Schlagboden (7), auf welchem der vorgespannte Schlagkolben (3) nach Auslösen der Auslösevorrichtung (5) mit definiertem Impuls aufschlägt, und – eine Impulsleitvorrichtung (8), welche den Impuls an ein Implantatteil weiterleitet.Setting instrument for producing a conical clamping connection between parts of an endoprosthetic implant having a defined and reproducible clamping effect, comprising: a housing body ( 1 ), - inside the housing body ( 1 ) on a piston rod ( 2 ) guided percussion piston ( 3 ), - a tensioning device ( 4 ) at the first end of the housing body ( 1 ), by means of the percussion piston ( 3 ), - a triggering device ( 5 ) for the preloaded percussion piston ( 3 ), - an adjustment device ( 6 ) to select the clamping force of the tensioning device ( 4 ), - a housing body ( 1 ) at the second end final impact floor ( 7 ), on which the preloaded percussion piston ( 3 ) after triggering the triggering device ( 5 ) with defined pulse, and - a pulse guiding device ( 8th ), which forwards the pulse to an implant part. Setzinstrument nach Anspruch 1, bei dem die Impulsleitvorrichtung (8) ein der Form des zu verbindenden Implantatteils angepasstes Formteil (12) aufweist.Setting instrument according to claim 1, in which the impulse guiding device ( 8th ) a molded part adapted to the shape of the implant part to be connected ( 12 ) having. Setzinstrument nach Anspruch 1 oder 2, bei dem die Spannvorrichtung (4) eine Druckfeder aufweist.Setting instrument according to claim 1 or 2, in which the tensioning device ( 4 ) has a compression spring. Setzinstrument nach einem der Ansprüche 1 bis 3, bei dem die Auslösevorrichtung (5) einen federkraftbelasteten Auslöseknopf (9) aufweist.Setting instrument according to one of claims 1 to 3, wherein the triggering device ( 5 ) a spring-loaded release button ( 9 ) having. Setzinstrument nach einem der Ansprüche 1 bis 4, bei dem die Impulsleitvorrichtung (8) zwischen dem Schlagboden (7) und dem Formteil (12) ein starres Übergangsstück (13) aufweist.Setting instrument according to one of claims 1 to 4, in which the impulse guiding device ( 8th ) between the beat floor ( 7 ) and the molded part ( 12 ) a rigid transition piece ( 13 ) having.
DE200620000845 2006-01-17 2006-01-17 Setting instrument for making conical joint between modular parts has casing, driving piston with piston rod, tensioning device and actuating device whereby at second end of driving piston, an impulse directing device is arranged Expired - Lifetime DE202006000845U1 (en)

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