DE19852687C1 - Instrument for implanting an artificial hip joint socket pan in the acetabulum has a structured head which grips a peak passage without contact to position it without distortion or damage - Google Patents

Instrument for implanting an artificial hip joint socket pan in the acetabulum has a structured head which grips a peak passage without contact to position it without distortion or damage

Info

Publication number
DE19852687C1
DE19852687C1 DE19852687A DE19852687A DE19852687C1 DE 19852687 C1 DE19852687 C1 DE 19852687C1 DE 19852687 A DE19852687 A DE 19852687A DE 19852687 A DE19852687 A DE 19852687A DE 19852687 C1 DE19852687 C1 DE 19852687C1
Authority
DE
Germany
Prior art keywords
head
pan
socket
pelvic
inlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE19852687A
Other languages
German (de)
Inventor
Hans Grundei
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.)
ORTHODYNAMICS GMBH, DE
Original Assignee
Eska Implants GmbH and Co KG
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 Eska Implants GmbH and Co KG filed Critical Eska Implants GmbH and Co KG
Priority to DE19852687A priority Critical patent/DE19852687C1/en
Application granted granted Critical
Publication of DE19852687C1 publication Critical patent/DE19852687C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • A61F2/46—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
    • A61F2/4609—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 acetabular cups
    • 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
    • A61F2002/30495—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking ring
    • 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
    • A61F2002/30329—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
    • 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
    • A61F2/34—Acetabular cups
    • A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
    • A61F2002/3403—Polar aperture
    • 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
    • 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
    • A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0069—Sealing means
    • A61F2250/007—O-rings

Abstract

The instrument to position the socket of an artificial hip joint in the acetabulum, with an inlet as the sliding surface to work with the ball of the prosthesis in a conical clamped fit within the socket, has a passage opening at the pole zone of the inlet with a bell and a head (10) at the leading end. The outer contour (50) of the head matches the inner contours (30) of the socket pan (40), but with slightly smaller dimensions, so that the head can be placed without contact within the socket pan (40). The head (10) has a guide pin (100) to be set into the passage opening (110) at the peak of the socket pan (40), with a unit (130) to apply radial forces at its circumference. When the pin (100) has been inserted in the passage (110), the unit (130) bears against the inner wall of the passage opening (110) through the forces acting radially outwards. The head (10) has at least one elastic spacer (80), as an O-ring, which holds the outer contours (50) clear of the inner contours (30) of the socket pan (40) during the insertion process.

Description

Die vorliegende Erfindung betrifft ein Beckenpfannen-Setzinstrument zum Setzen einer künstlichen Beckenpfanne in ein Acetabulum, wobei nach dem Einsetzen der Beckenpfanne in deren Inneres ein Inlet eingesetzt wird, welches aus geeignetem Material besteht und den Gleitpartner für die künstliche Gelenkkugel des künstlichen Hüftgelenks bildet. Als Inlet kommt in der Praxis häufig hochverdichtetes Polyethylen zum Einsatz. Seit einiger Zeit jedoch findet keramisches Material als Inlet verstärkt Verwendung. Insbesondere ein Inlet aus Keramik erfordert bei der Einpassung in das Innere der Gelenkpfanne höchste Sorgfalt, was die Passungen betrifft. Üblicherweise wird das Inlet im Beckenpfanneninneren durch einen konischen Klemmsitz gehalten, der Geometrieabweichungen von höchstens 10 µm zuläßt. Ist das Spiel größer, kommt es zu keinem dauerhaften Klemmsitz des Inlets in der Gelenkpfanne, so daß das Inlet bildhaft gesprochen im Gelenkpfanneninneren schwimmt, was unter Belastung des künstlichen Gelenkes zu einer regelrechten Sprengung des Materials führen kann. Diese Kenngröße ist bei der Verwendung von hochverdichtetem Polyethylen als Inletmaterial nicht kritisch, da es in weitem Bereich zähelastisch ist.The present invention relates to a pelvic socket setting instrument for Place an artificial pelvic pan in an acetabulum, after which Insert the pelvic pan inside which an inlet is inserted, which made of suitable material and the sliding partner for the artificial Joint ball of the artificial hip joint forms. As an inlet comes in practice often high density polyethylene is used. For some time, however ceramic material is increasingly used as an inlet. In particular a Ceramic inlet requires when fitting into the interior of the socket utmost care when it comes to fits. Usually the inlet is in the The inside of the pelvic pan is held in place by a conical clamp seat Geometry deviations of 10 µm or less are permitted. If the game is bigger there is no permanent clamping fit of the inlet in the socket, so that the inlet is pictorially floating inside the socket, what under load of the artificial joint to a real explosion of the Material can result. This parameter is when using High density polyethylene as the inlet material is not critical as it is by far Area is tough-elastic.

Ein Beckenpfarmen-Setzinstrument, welches während des Einsetzvorganges der Beckenpfanne in das Acetabulum zu keinerlei Verformungen des Beckenpfanneninneren führt, ist beispielsweise bekannt aus der DE 196 28 193 C2. Dieses weist am vorderen Ende einen Kopf auf, der zu den Innenkonturen der Beckenpfanne im wesentlichen komplementär ausgeformte Außenkonturen geringfügig kleinerer Dimension aufweist, so daß er berührungsfrei in das Innere der Beckenpfanne setzbar ist, an dessen Basis ein Ringflansch zur Anlage an die Basiskante der Beckenpfanne vorgesehen ist, und der wenigstens einen elastischen Abstandshalter aufweist, der seine Außenkonturen von den Innenkonturen der Beckenpfanne auch während des Einsetzvorganges fernhält.A pelvic plant setting instrument, which during the insertion process Pelvic pan into the acetabulum to no deformation of the The interior of the basin pan is known, for example, from DE 196 28 193 C2. This has a head at the front end that leads to the inner contours the basin pan has essentially complementary outer contours has a slightly smaller dimension so that it is non-contact in the Inside the basin pan can be placed, at the base of which is an annular flange  System is provided on the base edge of the basin pan, and at least has an elastic spacer that its outer contours from the Keeps the inner contours of the pelvic pan away even during the insertion process.

Wenn dieses Beckenpfannen-Setzinstrument in der Praxis auch ein äußerst schonendes Einsetzen der künstlichen Beckenpfanne in das Acetabulum ermöglicht, so haftet diesem bekannten Instrument doch folgender Nachteil an: Aufgrund der Anbringung eines Ringflansches zur Anlage an der Basiskante der Beckenpfanne ist der Kopf des Instrumentes recht voluminös, wodurch die Handhabung bei räumlich recht engen Verhältnissen am Implantationsort nicht erleichtert wird.If this pelvic socket setting instrument is also extremely practical gentle insertion of the artificial pelvic pan into the acetabulum enables, this known instrument has the following disadvantage: Due to the attachment of a ring flange to the base edge the pelvic pan, the head of the instrument is quite voluminous, which makes the Not to be handled in very confined spaces at the implantation site is facilitated.

Vor diesem Hintergrund ist es die Aufgabe der vorliegenden Erfindung, ein eingangs genanntes Beckenpfannen-Setzinstrument so weiterzubilden, daß es auch bei räumlich engen Implantationsverhältnissen gleich gute Wirkungen erzielt wie das bekannte Setzinstrument.Against this background, it is the object of the present invention initially mentioned pelvic socket setting instrument so that it equally good effects even with spatially narrow implantation conditions achieved like the well-known setting instrument.

Gelöst wird diese Aufgabe mit dem Beckenpfannen-Setzinstrument mit den Merkmalen des Anspruchs 1. Weitere vorteilhafte Ausführungsformen ergeben sich aus den Unteransprüchen.This task is solved with the pelvic socket setting instrument with the Features of claim 1. Further advantageous embodiments result itself from the subclaims.

Im Unterschied zu dem Beckenpfannen-Setzinstrument gemäß der oben genannten Druckschrift ist vorliegend nicht vorgesehen, an der Basis des Kopfes einen Ringflansch vorzusehen. Vielmehr wird ein vollkommen andersartiges Halteelement vorgeschlagen, bei dem die Beckenpfanne in ihrem Polbereich einen Durchbruch aufweist und der Kopf einen durch diesen Durchbruch setzbaren Führungszapfen aufweist, auf dessen Umfang ein Radialkräfte erzeugendes Element sitzt, welches sich nach Einsatz des Führungszapfens in den Durchbruch an die Innenwandung des Durchbruchs unter Ausübung radial nach außen wirkender Kräfte anlegt. In contrast to the pelvic socket setting instrument according to the above mentioned publication is not provided in the present case, at the base of the To provide a ring flange. Rather, one becomes perfect different type of holding element proposed, in which the pelvic pan in her Pole area has a breakthrough and the head through this Breakthrough insertable guide pin on its circumference Radial force generating element sits, which after use of the Guide pin in the opening on the inner wall of the opening applies radially outward forces.  

Beim Einführen des Führungszapfens in den Durchbruch im Polbereich der Beckenpfanne wird das die Radialkräfte erzeugende Element quasi zusammengedrückt, wodurch als Reaktion nach Einsatz des Führungszapfens in den Durchbruch radiale Haltekräfte vom Führungszapfen auf die Innenwandung des Durchbruchs ausgeübt werden. Als weitere Anlagestelle des Kopfes in der Beckenpfanne ist - wie per se bekannt - wiederum wenigstens ein Element als elastischer Abstandshalter vorgesehen, der die Außenkonturen des Kopfes von den Innenkonturen der Beckenpfanne auch während des Einsetzvorganges fernhält.When inserting the guide pin into the opening in the pole area of the Basin pan becomes the element that generates the radial forces compressed, causing a reaction after inserting the pilot pin in the breakthrough radial holding forces from the guide pin to the Inner wall of the opening can be exercised. As another investment agency of the Head in the pelvic pan - as is known per se - is at least again an element is provided as an elastic spacer, which the outer contours of the head from the inner contours of the pelvic pan even during the Keeps insertion process away.

Das erfindungsgemäße Beckenpfannen-Setzinstrument kann kleiner ausgeführt werden als jenes gemäß der genannten Druckschrift, so daß die Forderung hinsichtlich der kleineren Baugröße erfüllt wird, ohne aber Einbußen im Hinblick auf die Handhabung in Kauf nehmen zu müssen.The pelvic socket setting instrument according to the invention can be made smaller are considered to be those according to the cited document, so that the claim with regard to the smaller size, but without sacrificing With regard to handling.

Gemäß einer bevorzugten Ausführungsform ist das die Radialkräfte erzeugende Element ein Federring, der mittels einer Verschlußschraube auf dem Führungszapfen gesichert ist.According to a preferred embodiment, this is the one that generates the radial forces Element is a spring washer, which is attached to the Guide pin is secured.

Gemäß einer vorteilhaften Weiterbildung ist der wenigstens eine Abstandshalter gebildet aus einem in die Peripherie des Kopfes eingelassenen O-Ring. Es können freilich auch mehrere O-Ringe in den Kopf eingelassen sein, die dann als Platzhalter zwischen dem Kopf und dem Inneren der Beckenpfanne fungieren. Die elastischen Eigenschaften der Abstandshalter ermöglichen es, daß der Operateur beispielsweise mit einem Hammer auf das Ende der Hantel schlägt während des Einsetzvorganges, ohne daß es zu einer Berührung zwischen dem Kopf und dem Inneren der Gelenkpfanne kommen würde. Kleine Bewegungen puffert der Abstandshalter in Form des O-Ringes ab. According to an advantageous development, the at least one spacer formed from an O-ring embedded in the periphery of the head. It Of course, several O-rings can be embedded in the head, which then as a placeholder between the head and the inside of the basin pan act. The elastic properties of the spacers make it possible to that the operator, for example, with a hammer on the end of the barbell beats during the insertion process without causing any contact would come between the head and the inside of the socket. The spacer buffers small movements in the form of the O-ring.  

In einer bevorzugten Ausführungsform besteht der Abstandshalter im übrigen aus Kautschuk. Andere zähelastische Materialien kommen jedoch ebenfalls in Betracht.In a preferred embodiment, the spacer is otherwise made of rubber. However, other tough elastic materials also come in Consideration.

Die Erfindung wird anhand eines Ausführungsbeispiels gemäß den Zeichnungsfiguren näher erläutert. Hierbei zeigt:The invention is based on an embodiment according to the Drawing figures explained in more detail. Here shows:

Fig. 1 eine Ansicht - teilweise im Schnitt - des Kopfes des Setzinstrumentes mit seinen Komponenten, und Fig. 1 is a view - partly in section - of the head of the setting instrument with its components, and

Fig. 2 eine Schnittansicht durch eine Beckenpfanne, in welche der Kopf des Setzinstrumentes gemäß Fig. 1 eingesetzt ist. Fig. 2 is a sectional view through a pelvic pan, in which the head of the setting instrument according to FIG. 1 is inserted.

Fig. 1 zeigt den Kopf 10 des Beckenpfannen-Setzinstrumentes in Seitenansicht, mit dem eine nicht dargestellte Hantel verbindbar ist. Fig. 1 shows the head 10 of the pelvic socket setting instrument in side view, with which a dumbbell, not shown, can be connected.

Der Kopf 10 ist massiv ausgebildet mit einer Außenkontur, welche der Außenkontur des in die Beckenpfanne 40 (Fig. 2) einzusetzenden Inlets (nicht dargestellt) entspricht. Allerdings ist der Kopf etwas kleiner, da vorliegend ja keine konische Verklemmung zwischen dem Kopf 10 und der Beckenpfanne 40 angestrebt wird. Am vorderen Ende ist ein zylindrischer Führungszapfen 100 ausgebildet, der in einen entsprechenden Durchbruch 110 im Polbereich der Beckenpfanne 40 einsetzbar ist.The head 10 is solid with an outer contour which corresponds to the outer contour of the inlet (not shown) to be inserted into the basin pan 40 ( FIG. 2). However, the head is somewhat smaller, since no conical jamming between the head 10 and the basin pan 40 is sought in the present case. At the front end, a cylindrical guide pin 100 is formed, which can be inserted into a corresponding opening 110 in the pole area of the basin pan 40 .

Auf dem Führungszapfen 100 sitzt ein Federring 130 als das Radialkräfte erzeugende Element, der mit einer Verschlußschraube 140 auf dem Führungszapfen 100 gesichert ist.A spring ring 130 sits on the guide pin 100 as the element which generates the radial forces and is secured on the guide pin 100 with a locking screw 140 .

In der Peripherie des Kopfes 10 ist vorliegend ein O-Ring 80 in eine eigens dafür vorgesehene Ringnut 90 eingelassen, derart, daß er als Abstanshalter dient, wenn der Kopf 10 in die Beckenpfanne 40 geführt wird. Dieser O-Ring 80 besteht aus einem elastischen Material, so daß er auch beim eingesetzten Kopf 10 in der Beckenpfanne 40 zusammengedrückt werden kann.In the periphery of the head 10 , an O-ring 80 is embedded in an annular groove 90 provided for this purpose in such a way that it serves as a spacer when the head 10 is guided into the basin pan 40 . This O-ring 80 is made of an elastic material so that it can be compressed in the basin pan 40 even when the head 10 is inserted.

Wenn der Kopf 10 in die Beckenpfanne 40 geführt wird, wird der Federring 130 beim Eindringen in den Durchbruch 110 in der Beckenpfanne 40 etwas zusammengedrückt, was als Reaktion nach außen wirkende Radialkräfte zur Folge hat, die gegen die Innenwandung des Durchbruchs 110 in der Beckenpfanne 40 drücken. Auf diese Weise wird im Bereich des Führungszapfens 10 eine Haltewirkung erzielt, die notwendigerweise ergänzt wird durch die Haltewirkung aufgrund der Anlage des O-Ringes 80 an den Innenkonturen 30 der Beckenpfanne 40.If the head 10 is guided into the basin pan 40 , the spring ring 130 is compressed somewhat when penetrating the opening 110 in the basin pan 40 , which as a result results in radial forces acting outwards which act against the inner wall of the opening 110 in the basin pan 40 to press. In this way, a holding effect is achieved in the region of the guide pin 10 , which is necessarily supplemented by the holding effect due to the contact of the O-ring 80 with the inner contours 30 of the basin pan 40 .

Der so erzeugte stabile Sitz der Beckenpfanne 40 auf dem Kopf 10 des Beckenpfannen-Setzinstrumentes gewährleistet eine leichte Handhabung beim Setzen der Beckenpfanne 40 in ein Acetabulum, ohne daß Beschädigungen aufgrund der Haltewirkung des Setzinstrumentes an der Beckenpfanne 40 entstünden.The stable seat of the pelvic pan 40 thus produced on the head 10 of the pelvic pan setting instrument ensures easy handling when placing the pelvic pan 40 in an acetabulum without causing damage due to the holding action of the setting instrument on the pelvic pan 40 .

An keiner Stelle der Innenkonturen 30 der Beckenpfanne 40, die später an dem konischen Klemmsitz des einzusetzenden Inlets teilnehmen, findet eine Berührung mit dem Kopf 10 statt. Hierfür sorgt sowohl die geringfügig kleinere Dimension des Kopfes 10, als auch der Abstandshalter bzw. O-Ring 80. Als weitere Kontaktstelle zwischen Beckenpfanne 40 und dem Kopf 10 des Setzinstrumentes fungiert darüberhinaus nur die Innenwandung des Durchbruchs 110 im Polbereich der Beckenpfanne 40.At no point in the inner contours 30 of the basin pan 40 , which later take part in the conical clamping fit of the inlet to be used, does the head 10 come into contact. This is ensured both by the slightly smaller dimension of the head 10 and by the spacer or O-ring 80 . Furthermore, only the inner wall of the opening 110 in the pole region of the pelvic pan 40 functions as a further contact point between the pelvic socket 40 and the head 10 of the setting instrument.

Claims (4)

1. Beckenpfannen-Setzinstrument zum Setzen einer künstlichen Beckenpfanne mit einem Inlet als Gleitpartner für eine künstliche Gelenkkugel des künstlichen Hüftgelenks in ein Acetabulum, wobei das Inlet in einen konischen Klemmsitz in das Innere der Beckenpfanne eingebracht wird, die in ihrem Pol-Bereich einen Durchbruch aufweist, mit einer Hantel, an deren vorderem Ende ein Kopf (10) angebracht ist,
  • - der zu den Innenkonturen (30) der Beckenpfanne (40) im wesentlichen komplementär ausgeformte Außenkonturen (50) geringfügig kleinerer Dimension aufweist, so daß er berührungsfrei in das Innere der Beckenpfanne (40) setzbar ist,
  • - der einen in den Durchbruch (110) im Pol-Bereich der Beckenpfanne (40) setzbaren Führungszapfen (100) aufweist, auf dessen Umfang ein Radialkräfte erzeugendes Element (130) sitzt, welches sich nach Einsatz des Führungszapfens (100) in den Durchbruch (110) an die Innenwandung des Durchbruchs (110) unter Ausübung radial nach außen wirkender Kräfte anlegt,
  • - der wenigstens einen elastischen Abstandshalter (80) aufweist, der seine Außenkonturen (50) von den Innenkonturen (30) der Beckenpfanne (40) auch während des Einsetzvorganges fernhält.
1. pelvic socket setting instrument for placing an artificial pelvic socket with an inlet as a sliding partner for an artificial joint ball of the artificial hip joint in an acetabulum, the inlet being inserted into a conical clamp seat in the interior of the pelvic socket, which has a breakthrough in its pole area , with a dumbbell, at the front end of which a head ( 10 ) is attached,
  • - The outer contours ( 50 ), which are essentially complementary to the inner contours ( 30 ) of the basin pan ( 40 ), have a slightly smaller dimension, so that they can be placed in the interior of the basin pan ( 40 ) without contact,
  • - having a settable in the opening (110) in the pole region of the pelvic socket (40) guide pins (100), sitting on the periphery of which a radial force-generating element (130) which, after use of the guide pin (100) in the opening ( 110 ) against the inner wall of the opening ( 110 ) while exerting radially outward forces,
  • - The at least one elastic spacer ( 80 ), which keeps its outer contours ( 50 ) from the inner contours ( 30 ) of the basin pan ( 40 ) even during the insertion process.
2. Beckenpfannen-Setzinstrument nach Anspruch 1, bei dem das Radialkräfte erzeugende Element (130) ein Federring ist, der mittels einer Verschlußschraube (140) auf dem Führungszapfen (100) gesichert ist. 2. Pelvic socket setting instrument according to claim 1, wherein the radial force generating element ( 130 ) is a spring ring which is secured by means of a locking screw ( 140 ) on the guide pin ( 100 ). 3. Beckenpfannen-Setzinstrument nach Anspruch 1 oder 2, bei dem der Abstandshalter (80) gebildet ist aus einem in die Peripherie des Kopfes (10) eingelassenen O-Ring.3. Pelvic socket setting instrument according to claim 1 or 2, wherein the spacer ( 80 ) is formed from an O-ring embedded in the periphery of the head ( 10 ). 4. Beckenpfannen-Setzinstrument nach einem der Ansprüche 1 bis 3, bei dem der wenigstens eine Abstandshalter (80) aus Kautschuk besteht.4. Pelvic socket setting instrument according to one of claims 1 to 3, wherein the at least one spacer ( 80 ) consists of rubber.
DE19852687A 1998-11-16 1998-11-16 Instrument for implanting an artificial hip joint socket pan in the acetabulum has a structured head which grips a peak passage without contact to position it without distortion or damage Expired - Fee Related DE19852687C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19852687A DE19852687C1 (en) 1998-11-16 1998-11-16 Instrument for implanting an artificial hip joint socket pan in the acetabulum has a structured head which grips a peak passage without contact to position it without distortion or damage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19852687A DE19852687C1 (en) 1998-11-16 1998-11-16 Instrument for implanting an artificial hip joint socket pan in the acetabulum has a structured head which grips a peak passage without contact to position it without distortion or damage

Publications (1)

Publication Number Publication Date
DE19852687C1 true DE19852687C1 (en) 2000-09-21

Family

ID=7887892

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19852687A Expired - Fee Related DE19852687C1 (en) 1998-11-16 1998-11-16 Instrument for implanting an artificial hip joint socket pan in the acetabulum has a structured head which grips a peak passage without contact to position it without distortion or damage

Country Status (1)

Country Link
DE (1) DE19852687C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10112527C1 (en) * 2001-03-15 2002-10-10 Mathys Medizinaltechnik Ag Bet Setting tool for inserting an expansion shell

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2264545B2 (en) * 1972-04-06 1976-03-25 Ausscheidung aus: 22 20 304 Oscobal AG, Selzach (Schweiz) INSTRUMENTS FOR INSERTING THE JOINT CUP OF A HIP PROSTHESIS
EP0535973A1 (en) * 1991-10-04 1993-04-07 JOHNSON & JOHNSON ORTHOPAEDICS, INC. An acetabular cup inserter
US5431657A (en) * 1994-05-23 1995-07-11 Zimmer, Inc. Instrument for installing an acetabular cup assembly
US5571111A (en) * 1995-05-01 1996-11-05 Aboczky; Robert I. Instrument for orienting, inserting and impacting an acetabular cup prosthesis including prosthesis retaining head arrangement
US5658294A (en) * 1993-12-02 1997-08-19 Sulzer Orthopedics Inc. Instrument for holding an acetabular cup
DE29608453U1 (en) * 1996-05-09 1997-09-11 Link Waldemar Gmbh Co Hip cup and surgical instrument for inserting the same
DE19628193C2 (en) * 1996-07-12 1998-06-04 Eska Implants Gmbh & Co Pelvic socket setting instrument

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2264545B2 (en) * 1972-04-06 1976-03-25 Ausscheidung aus: 22 20 304 Oscobal AG, Selzach (Schweiz) INSTRUMENTS FOR INSERTING THE JOINT CUP OF A HIP PROSTHESIS
EP0535973A1 (en) * 1991-10-04 1993-04-07 JOHNSON & JOHNSON ORTHOPAEDICS, INC. An acetabular cup inserter
US5658294A (en) * 1993-12-02 1997-08-19 Sulzer Orthopedics Inc. Instrument for holding an acetabular cup
US5431657A (en) * 1994-05-23 1995-07-11 Zimmer, Inc. Instrument for installing an acetabular cup assembly
US5571111A (en) * 1995-05-01 1996-11-05 Aboczky; Robert I. Instrument for orienting, inserting and impacting an acetabular cup prosthesis including prosthesis retaining head arrangement
DE29608453U1 (en) * 1996-05-09 1997-09-11 Link Waldemar Gmbh Co Hip cup and surgical instrument for inserting the same
DE19628193C2 (en) * 1996-07-12 1998-06-04 Eska Implants Gmbh & Co Pelvic socket setting instrument

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10112527C1 (en) * 2001-03-15 2002-10-10 Mathys Medizinaltechnik Ag Bet Setting tool for inserting an expansion shell
US7090678B2 (en) 2001-03-15 2006-08-15 Mathys Medizinaltechnik Ag Positioning instrument for inserting an extension shell

Similar Documents

Publication Publication Date Title
DE69916238T2 (en) INTRAOCULAR WEAR WITH FIXING FOR A TELESCOPIC
DE69631344T2 (en) DRILLING GAUGE INSTRUMENT
DE60111703T2 (en) MODULAR HIP PROSTHESIS
DE2838348C2 (en) Device for forming a bone opening
EP0656199B1 (en) Spherical hip joint acetabular cup
DE2908276C3 (en) Implantable protective device for a flexible, elastomeric joint endoprosthesis
DE3348066C2 (en)
EP1191907B1 (en) Modular socket for a ball joint prosthesis
EP1184009A1 (en) Linking device for use on the stirrup of auditory ossicles
EP0480209A1 (en) Blank for the manufacture of a dental workpiece and holding device therefor
EP1063941A1 (en) Device for handling ball heads of joint prostheses
EP0339530A2 (en) Endoprosthesis for a joint
DE4402675A1 (en) Tapered acetabular cup without self-locking
WO2006076962A2 (en) Coupling for the dimensionally stable connection of a prosthetic part to a retaining element
EP2862542A1 (en) Retention matrix and dental implant system
DE19704577B4 (en) Handling instrument of joint components with joint surfaces
DE19628193C2 (en) Pelvic socket setting instrument
DE19852687C1 (en) Instrument for implanting an artificial hip joint socket pan in the acetabulum has a structured head which grips a peak passage without contact to position it without distortion or damage
DE3616637C2 (en)
AT519955A4 (en) ARTIFICIAL LIGHTWEIGHT
DE2708526A1 (en) MAGNETIC DEVICE FOR HOLDING A DENTURE, IN PARTICULAR A DENTAL DENTURE ON A BONE, IN PARTICULAR ON THE JAW BONE
CH627363A5 (en) Endoprosthetic hinge joint
DE102008032593A1 (en) Zementapplikator
EP0796598A2 (en) Prosthetic joint cup
EP1112480A1 (en) Method for testing ceramic socket inserts of hip joint endoprotheses

Legal Events

Date Code Title Description
8100 Publication of the examined application without publication of unexamined application
D1 Grant (no unexamined application published) patent law 81
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee
R081 Change of applicant/patentee

Owner name: ORTHODYNAMICS GMBH, DE

Free format text: FORMER OWNER: ESKA IMPLANTS GMBH & CO.KG, 23556 LUEBECK, DE

Effective date: 20110707

R082 Change of representative

Representative=s name: DEHNS, GB