DE19824328C1 - Instrument for freeing an inlay from the socket of an artificial hip joint, comprises a holder with a front support element, a flange, and a suction member on a mandrel - Google Patents
Instrument for freeing an inlay from the socket of an artificial hip joint, comprises a holder with a front support element, a flange, and a suction member on a mandrelInfo
- Publication number
- DE19824328C1 DE19824328C1 DE19824328A DE19824328A DE19824328C1 DE 19824328 C1 DE19824328 C1 DE 19824328C1 DE 19824328 A DE19824328 A DE 19824328A DE 19824328 A DE19824328 A DE 19824328A DE 19824328 C1 DE19824328 C1 DE 19824328C1
- Authority
- DE
- Germany
- Prior art keywords
- inlay
- holder
- base
- instrument
- absorbent body
- 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
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
- A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
-
- 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
-
- 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
- A61F2002/30331—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
- 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
- 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
- A61F2002/3412—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
- A61F2002/3414—Polar protrusion, e.g. for centering two concentric shells
-
- 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
- A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
- A61F2002/4641—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis for disconnecting
-
- 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
- A61F2002/4685—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by means of vacuum
-
- 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
Abstract
Description
Die vorliegende Erfindung betrifft ein Instrument zum Herauslösen eines Inlays aus dem Sockel einer Beckenpfanne eines künstlichen Hüftgelenkes.The present invention relates to an instrument for removing an inlay from the base of a pelvic socket of an artificial hip joint.
Künstliche Hüftgelenke sind seit langem im medizinischen Einsatz. Sie bestehen üblicherweise aus einem (metallischen) Sockel, der in das (ausgefräste) Acetabulum im Hüftknochen gesetzt wird. In den Sockel wird dann als Gleitpartner für die künstliche Gelenkkugel ein Inlay gesetzt, welches meist aus hochverdichtetem Polyethylen oder einer Keramik besteht. Das Inlay wird meist in einer konischen Verklemmung im Sockel der künstlichen Beckenpfanne gehalten.Artificial hip joints have long been used in medicine. she usually consist of a (metallic) base that fits into the (milled) acetabulum is placed in the hip bone. In the base then set an inlay as a sliding partner for the artificial joint ball, which mostly consists of high-density polyethylene or a ceramic. The inlay is usually in a conical jamming in the base of the artificial Basin pan held.
Während der Operation wird der Sockel vom Operateur in das vorbereitete natürliche Acetabulum gesetzt und das Inlay sodann eingesetzt. Hierbei kann es sich weisen, daß der Operateur die Einbaulage des Sockels im Beckenknochen nicht als optimal einschätzt, so daß er dann eine Positionsveränderung vornehmen möchte.During the operation, the base is inserted into the prepared one by the surgeon set natural acetabulum and then insert the inlay. Here it can prove that the surgeon installed the base in the pelvic bone does not assess it as optimal, so that it then changes position want to make.
Dies ist freilich nicht ohne weiteres zu erzielen, da ein Ansetzen eines Werkzeugs an das Implantat zu Beschädigungen der kalottenförmigen Ausnehmung im Inlay, welche mit der künstlichen Gelenkkugel des künstlichen Hüftgelenkes zusammenarbeiten soll, sowie des Sockels führen könnte. Demzufolge muß das Inlay zur Positionskorrektur des Sockels im Acetabulum kurzzeitig herausgelöst werden. Dies sollte freilich ohne Beschädigung sowohl des Sockels als auch des Inlays möglich sein.Of course, this is not easy to achieve, because an application of a Tool to the implant to damage the dome-shaped Recess in the inlay, which with the artificial joint ball of the artificial Hip joint should work together, and the base could lead. As a result, the inlay must be used to correct the position of the base in the acetabulum be removed briefly. This should, of course, be done without damage the base as well as the inlay.
Instrumente zum Herauslösen eines Inlays aus dem Sockel einer Beckenpfanne eines künstlichen Hüftgelenkes sind beispielsweise bekannt aus den folgenden Druckschriften: DE 196 11 249 A1, DE 44 29 026 C2, EP 0 470 912 A2/A3. Bei sämtlichen dieser Instrumente wird eine mechanische Verbindung zwischen dem Instrument und dem Inlay hergestellt, bevor letzteres aus der Beckenpfanne herausgezogen werden kann. Dies ist akzeptabel für Inlays, die nach einer gewissen Tragzeit und damit erfolgtem Abrieb per se ausgetauscht werden müssen. Dies ist jedoch nicht akzeptabel für neue Inlays, die während der Operation nur leicht versetzt eingesetzt worden sind, so daß sie lediglich einer Lagekorrektur bedürfen. Hier ist ein direkter mechanischer Kontakt mit dem Instrument unerwünscht, da das Inlay eben aufgrund einer mechanischen Verbindung Schaden erleiden kann.Instruments for removing an inlay from the base of a basin pan an artificial hip joint are known, for example, from the following Publications: DE 196 11 249 A1, DE 44 29 026 C2, EP 0 470 912 A2 / A3. All of these instruments use a mechanical connection between the instrument and the inlay before the latter from the Basin pan can be pulled out. This is acceptable for inlays that exchanged per se after a certain period of wear and wear Need to become. However, this is not acceptable for new inlays made during the operation have been used only slightly offset, so that they are only need a position correction. Here is a direct mechanical contact with the instrument is undesirable because the inlay is due to a mechanical Connection can suffer damage.
Aus der DE 196 11 248 A1 ist eine prothetische Gelenkpfanne bekannt, bei der vorgesehen ist, mittels eines Schlaginstrumentes auf die metallische Beckenpfanne zu schlagen, um so das Inlay aus der Beckenpfanne zu entfernen. Dies mag noch akzeptabel sein bei relativ elastischen Inlays Polyethylen. Dies ist nicht akzeptabel bei beispielsweise keramischen Inlays, welche wesentlich starrer sind als ein Inlay aus Polyethylen.A prosthetic socket is known from DE 196 11 248 A1, at which is provided by means of a percussion instrument on the metallic Beat the pelvic pan to close the inlay from the pelvic pan remove. This may still be acceptable for relatively elastic inlays Polyethylene. This is not acceptable for example with ceramic inlays, which are much more rigid than an inlay made of polyethylene.
Demzufolge ist es also die Aufgabe der vorliegenden Erfindung, ein Instrument zum Herauslösen eines Inlays aus dem Sockel aus der Beckenpfanne eines künstlichen Hüftgelenkes anzugeben, mittels dessen das Inlay einfach und schnell beschädigungslos aus dem Sockel entfernt werden kann. Accordingly, the object of the present invention is an instrument to remove an inlay from the base of the basin pan Specify artificial hip joint, by means of which the inlay is simple and can be quickly removed from the base without damage.
Gelöst wird diese Aufgabe durch das Instrument mit den Merkmalen gemäß dem Anspruch 1. Weitere vorteilhafte Ausgestaltungen ergeben sich aus den Unteransprüchen.This task is solved by the instrument with the characteristics according to Claim 1. Further advantageous configurations result from the Subclaims.
Demgemäß ist vorgesehen, daß das Instrument aus einem Halter besteht, an dessen vorderem Ende ein Abstützelement mit einem wenigstens teilweise umlaufenden angeformten Flansch zur Anlage an der Basiskante des Sockels sitzt, der einen zentriert sitzenden kalottenförmigen Saugkörper einfaßt mit komplementär zu dem für eine Gelenkkugel vorgesehenen Hohlraum im Inlay ausgebildeten Außenkonturen, bei dem der Saugkörper auf einem längsverschieblich im Halter gelagerten Dorn sitzt.Accordingly, it is provided that the instrument consists of a holder whose front end is a support element with an at least partially molded flange around the base edge of the base sits with a centered dome-shaped absorbent body complementary to the cavity provided for a joint ball in the inlay Outer contours, in which the absorbent body on a longitudinally displaceable in Holder seated mandrel sits.
Zum Herauslösen des Inlays aus dem Sockel wird der auf dem längsverschieblich gelagerten Dorn sitzende Saugkörper in die Ausnehmung des Inlays geführt, wodurch die darin befindliche Luft verdrängt wird. Hierdurch entsteht ein vakuumähnlicher Zustand zwischen dem Saugkörper und dem Inlay, der es ermöglicht, nachdem sich der erwähnte Flansch an dem Sockel der Beckenpfanne angelegt hat, unter Abstützung hieran das Inlay aus dem Sockel heraus abzuziehen. Eine Erhöhung der Abzugskraft durch ein aktives Abpumpen der Luft in der Ausnehmung des Inlays bedarf es nicht.To remove the inlay from the base, the on the absorbent body seated longitudinally displaceable in the recess of the inlay, which displaces the air inside. This creates a vacuum-like state between the absorbent and the inlay, which makes it possible, after the mentioned flange on the Base of the basin pan, supported by the inlay pull the base out. An increase in the pull-off force by a active pumping of the air in the recess of the inlay is not required.
Gemäß einer Ausführungsform ist vorgesehen, daß der Dorn, auf welchem der Saugkörper sitzt, in Ruhestellung in seiner ausgefahrenen Stellung verharrt und mittels eines Schiebers entgegen einer im Halter untergebrachten Feder in seine zurückgezogene Stellung schiebbar ist, so daß das Instrument in seinem einsatzbereiten, sozusagen geladenen Zustand gebracht werden kann. Wird der Schieber zurückgezogen und dadurch die besagte Feder komprimiert, kann der Schieber in der geladenen Stellung arretiert werden und durch Auslösen des Schiebers vom Operateur der Herauslösevorgang des Inlays eingeleitet werden.According to one embodiment it is provided that the mandrel on which the Suction body sits, remains in its extended position in the rest position and by means of a slide against a spring housed in the holder retracted position is slidable so that the instrument in its ready for use, so to speak brought charged. Will the Retracted slide and thereby compressing the said spring, the Slider can be locked in the loaded position and by triggering the Slider be initiated by the surgeon to remove the inlay.
Gemäß einer vorteilhaften Weiterbildung ist vorgesehen, daß der Saugkörper zirkulär angeordnete Rillen aufweist, welche die Oberfläche des Saugkörpers auffächern. Hierdurch wird ein besonders gutes Heranschmiegen des Saugkörpermaterials an das Innere des Hohlraums im Inlay erzielt unter gleichzeitigem Entweichen der darin befindlichen Luft.According to an advantageous development, it is provided that the absorbent body has circularly arranged grooves, which the surface of the absorbent body fan out. This is a particularly good nestling of the Absorbent material is achieved under the interior of the cavity in the inlay simultaneous escape of the air inside.
Vorzugsweise besteht der Saugkörper aus einem weichelastischen Material, wie beispielsweise Weichgummi oder Silikon. Das Material ist in der Lage, sich zerstörungsfrei an den Hohlraum im Inlay anzulegen und gleichzeitig das relative Vakuum herzustellen.Preferably, the absorbent body consists of a soft elastic material, such as for example soft rubber or silicone. The material is capable of itself apply non-destructively to the cavity in the inlay and at the same time create relative vacuum.
Das proximal angeordnete Abstützelement, welches sich mit dem zumindest teilweise umlaufenden Flansch an die Basiskante des Sockels der Beckenpfanne legt, ist gemäß einer Ausführungsform gebildet aus einer am vorderen Ende des Halters angebrachten Platte mit umlaufenden Flansch.The proximally arranged support element, which at least with the partially circumferential flange to the base edge of the base of the basin pan is formed according to one embodiment from one at the front end of the holder attached plate with circumferential flange.
Alternativ hierzu kann vorgesehen sein, das Abstützelement auszubilden aus einem am proximalen Ende des Halters angeformten Doppelkreuzsteg mit umhüllenden Kreisring, welcher den Flansch zur Anlage an der Basiskante der Beckenpfanne trägt.As an alternative to this, provision can be made to form the support element with a double cross bar formed on the proximal end of the holder enveloping circular ring, which is the flange for contact with the base edge of the Pelvic pan carries.
Die Erfindung wird anhand einer Ausführungsform gemäß den Zeichnungsfiguren beispielhaft näher erläutert. Hierbei zeigt: The invention is based on an embodiment according to the Drawing figures explained in more detail by way of example. Here shows:
Fig. 1 das Instrument im geladenen Zustand, Fig. 1 shows the instrument in the charged state,
Fig. 2 das Instrument nach Heranführen an das aus dem Sockel herauszulösende Inlay, Fig. 2 shows the instrument according to the introduction to herauszulösende from the base inlay,
Fig. 3 das Instrument nach dem Hereinführen des Saugkörpers des Instrumentes in den Hohlraum des Inlays, Fig. 3 shows the instrument according to the leading in of the absorbent body of the instrument into the cavity of the inlay,
Fig. 4 das Instrument nach dem Herauslösen des Inlays aus dem Sockel, und Fig. 4 shows the instrument after removing the inlay from the base, and
Fig. 5 die Einzelheit des Verriegelungsmechanismus des Schiebers. Fig. 5 shows the detail of the locking mechanism of the slide.
Nachfolgend sind in den Zeichnungsfiguren gleiche Teile mit denselben Bezugszeichen versehen.Below are the same parts with the same in the drawing figures Provide reference numerals.
Das erfindungsgemäße Instrument besteht aus einem Halter 1 mit einem Handgriff 14. Am vorderen Ende des Halters 1 ist ein Abstützelement 4, hier als Platte dargestellt, angeformt, an welchem wiederum ein umlaufender Flansch 5 sitzt. Der Flansch 5 faßt einen Saugkörper 7 ein, der zentriert auf einem im Halter 1 längsverschieblich gelagerten Dorn 8 sitzt. Der Dorn 8 ist mittels eines Schiebers 11 in einem Längsschlitz 12 im Halter 1 längsverschieblich angeordnet. Hierbei ist der Dorn 8 durch eine im Inneren des Halters 1 sitzenden Feder 10 federkraftbelastet, und zwar dergestalt, daß der Dorn 8 mit dem Saugkörper 7 in die zurückgezogene Stellung, wie in Fig. 1 dargestellt, also in den "Ladezustand" des Instrumentes gebracht werden kann unter Kompression der Feder 10. Der Schieber 11 wird in diesem Ladezustand des Instrumentes 1 im Längsschlitz 12 arretiert, und zwar wie in Fig. 5 in der gestrichelten Position dargestellt. Der Dorn wird also nach Erreichen der gespannten Lage des Dorns 8 aus dem Längsschlitz 12 ausgerückt. Betätigt nun der Operateur den Schieber 11 dergestalt, daß der Schieber 11 sich wieder längs des Längsschlitzes 12 bewegen kann, so schnellt der Dorn und der daran befestigte Saugkörper 7 in die entspannte Lage unter Entspannung der Feder 10.The instrument according to the invention consists of a holder 1 with a handle 14 . At the front end of the holder 1 , a support element 4 , shown here as a plate, is formed, on which in turn a peripheral flange 5 is seated. The flange 5 surrounds a suction body 7 which is centered on a mandrel 8 which is mounted in the holder 1 so as to be longitudinally displaceable. The mandrel 8 is arranged by means of a slide 11 in a longitudinal slot 12 in the holder 1 to be longitudinally displaceable. Here, the mandrel 8 is spring-loaded by a person sitting in the interior of the holder 1 spring 10, namely such that the mandrel 8 with the absorbent body 7 in the retracted position as shown in FIG. 1, that is in the "state of charge" made of the instrument can be under compression of the spring 10 . The slide 11 is locked in this state of charge of the instrument 1 in the longitudinal slot 12 , as shown in Fig. 5 in the dashed position. The mandrel is thus disengaged from the longitudinal slot 12 after reaching the tensioned position of the mandrel 8 . If the operator now actuates the slide 11 in such a way that the slide 11 can again move along the longitudinal slot 12 , the mandrel and the suction body 7 attached to it snap into the relaxed position with relaxation of the spring 10 .
Vorliegend ist der Saugkörper 7 mit zirkulär angeordneten Rillen 13 versehen, wodurch die Oberfläche des Saugkörpers 7 aufgefächert wird. Dies ermöglicht ein Anschmiegen des Saugkörpers an den Hohlraum 9 im Inlay 2.In the present case, the absorbent body 7 is provided with circularly arranged grooves 13 , as a result of which the surface of the absorbent body 7 is fanned out. This enables the absorbent body to nestle against the cavity 9 in the inlay 2 .
In Fig. 2 ist das Instrument dargestellt in einer Position, in der es an das herauszulösende Inlay herangeführt ist. Das Inlay 2 sitzt in einer konischen Verklemmung im Sockel 3 mit Basiskante 6.In Fig. 2 the instrument is shown in a position in which it is brought up to the inlay to be removed. The inlay 2 sits in a conical jamming in the base 3 with the base edge 6 .
In Fig. 2 ist die Feder 10 noch gespannt. Der Schieber 11 befindet sich noch in seiner aus dem Längsschlitz 12 ausgerückten Lage.In Fig. 2, the spring 10 is still under tension. The slider 11 is still in its disengaged position from the longitudinal slot 12 .
In Fig. 3 ist die Situation dargestellt, nachdem der Operateur den Schieber 11 durch einfaches Drücken wieder in den Längsschlitz 12 gebracht hat, woraufhin sich die Feder 10 entspannt und den Saugkörper in den Hohlraum 9 des Inlays 2 drückt. Hierbei wird die Restluft im Hohlraum des Inlays verdrängt und ein (relatives) Vakuum zwischen Inlay 2 und Saugkörper 7 erzeugt. Der Flansch 5 legt sich gegen die Basiskante 6 des Sockels 3 an.In Fig. 3 shows the situation after the operator has brought the slider 11 by simply pressing it into the longitudinal slot 12, whereupon the spring 10 relaxes and the absorbent body of the inlay 2 pressed into the cavity 9. The residual air in the cavity of the inlay is displaced and a (relative) vacuum is generated between the inlay 2 and the absorbent body 7 . The flange 5 bears against the base edge 6 of the base 3 .
Die Herstellung des Vakuums zwischen dem Saugkörper 7 und dem Inlay 2 gestattet nun ein Abziehen bzw. Herauslösen des Inlays aus dem Sockel 3. Hierzu reicht die Abzugskraft aus, um die konische Verklemmung zwischen dem Inlay 2 und dem Sockel 3 aufzuheben.The creation of the vacuum between the absorbent body 7 and the inlay 2 now allows the inlay to be removed or detached from the base 3 . For this purpose, the pulling force is sufficient to remove the conical jamming between the inlay 2 and the base 3 .
Das Ergebnis ist ein Herauslösen des Inlays aus dem Sockel 3 ohne jegliche Beschädigung, woraufhin der Operateur den Sockel 3 im natürlichen Acetabulum des Beckenknochens nochmals neu positionieren und das Inlay 2 danach wieder in den Sockel 3 setzen kann.The result is a detachment of the inlay from the base 3 without any damage, whereupon the surgeon can reposition the base 3 in the natural acetabulum of the pelvic bone and then put the inlay 2 back into the base 3 .
Nur der Vollständigkeit halber wird darauf hingewiesen, daß für jede Größe des Sockels 3 und damit des Inlays 2 jeweils ein Abstützelement 4 vorgesehen sein muß, welches an die Größe des Sockels 3 angepaßt ist, damit sich der Flansch 5 an die Basiskante 6 des Sockels 3 anlegen kann.For the sake of completeness, it is pointed out that a support element 4 must be provided for each size of the base 3 and thus of the inlay 2 , which is adapted to the size of the base 3 so that the flange 5 adjoins the base edge 6 of the base 3 can put on.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19824328A DE19824328C1 (en) | 1998-06-02 | 1998-06-02 | Instrument for freeing an inlay from the socket of an artificial hip joint, comprises a holder with a front support element, a flange, and a suction member on a mandrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19824328A DE19824328C1 (en) | 1998-06-02 | 1998-06-02 | Instrument for freeing an inlay from the socket of an artificial hip joint, comprises a holder with a front support element, a flange, and a suction member on a mandrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19824328C1 true DE19824328C1 (en) | 2000-03-09 |
Family
ID=7869468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19824328A Expired - Fee Related DE19824328C1 (en) | 1998-06-02 | 1998-06-02 | Instrument for freeing an inlay from the socket of an artificial hip joint, comprises a holder with a front support element, a flange, and a suction member on a mandrel |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE19824328C1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008000442A1 (en) * | 2006-06-28 | 2008-01-03 | Waldemar Link Gmbh & Co. Kg | Insertion instrument for joint sockets of prostheses |
| DE102008049661A1 (en) * | 2008-09-30 | 2010-04-01 | Smith & Nephew Orthopaedics Ag | Instrument for handling a joint component |
| DE102012207450A1 (en) * | 2012-05-04 | 2013-11-07 | Aesculap Ag | Surgical instrument for releasing clamping fit of pivot insert in joint socket e.g. acetabular cups, has insertion guide whose distance from inner surface of joint insert is short with respect to central position of joint insert |
| WO2014042983A1 (en) * | 2012-09-14 | 2014-03-20 | Biomet Manufacturing, Llc | Method and apparatus for implanting a prosthesis |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0470912A2 (en) * | 1990-06-29 | 1992-02-12 | Medinov Sa | Prosthetic assembly comprising a hip cup and an impact apparatus |
| DE4429026C2 (en) * | 1994-08-16 | 1995-11-16 | Mueller Wolfgang | Inlay removal instruments for total endoprosthesis |
| DE19611248A1 (en) * | 1996-03-22 | 1997-09-25 | Cerasiv Gmbh | Prosthetic socket |
| DE19611249A1 (en) * | 1996-03-22 | 1997-09-25 | Cerasiv Gmbh | Joint prosthesis and removal tool |
-
1998
- 1998-06-02 DE DE19824328A patent/DE19824328C1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0470912A2 (en) * | 1990-06-29 | 1992-02-12 | Medinov Sa | Prosthetic assembly comprising a hip cup and an impact apparatus |
| DE4429026C2 (en) * | 1994-08-16 | 1995-11-16 | Mueller Wolfgang | Inlay removal instruments for total endoprosthesis |
| DE19611248A1 (en) * | 1996-03-22 | 1997-09-25 | Cerasiv Gmbh | Prosthetic socket |
| DE19611249A1 (en) * | 1996-03-22 | 1997-09-25 | Cerasiv Gmbh | Joint prosthesis and removal tool |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008000442A1 (en) * | 2006-06-28 | 2008-01-03 | Waldemar Link Gmbh & Co. Kg | Insertion instrument for joint sockets of prostheses |
| CN101478935B (en) * | 2006-06-28 | 2012-06-13 | 沃尔德马连接两合公司 | Insertion instrument for joint sockets of prostheses |
| US8361077B2 (en) | 2006-06-28 | 2013-01-29 | Arnold Keller | Insertion instrument for joint sockets of prostheses |
| DE102008049661A1 (en) * | 2008-09-30 | 2010-04-01 | Smith & Nephew Orthopaedics Ag | Instrument for handling a joint component |
| DE102012207450A1 (en) * | 2012-05-04 | 2013-11-07 | Aesculap Ag | Surgical instrument for releasing clamping fit of pivot insert in joint socket e.g. acetabular cups, has insertion guide whose distance from inner surface of joint insert is short with respect to central position of joint insert |
| WO2014042983A1 (en) * | 2012-09-14 | 2014-03-20 | Biomet Manufacturing, Llc | Method and apparatus for implanting a prosthesis |
| US9241811B2 (en) | 2012-09-14 | 2016-01-26 | Biomet Manufacturing, Llc | Method and apparatus for implanting a prosthesis |
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| 8100 | Publication of the examined application without publication of unexamined application | ||
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| 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 |
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