DE4220216C1 - Endoprosthesis - has bio-resorbable distance rings to set gap between prosthesis and bone - Google Patents

Endoprosthesis - has bio-resorbable distance rings to set gap between prosthesis and bone

Info

Publication number
DE4220216C1
DE4220216C1 DE19924220216 DE4220216A DE4220216C1 DE 4220216 C1 DE4220216 C1 DE 4220216C1 DE 19924220216 DE19924220216 DE 19924220216 DE 4220216 A DE4220216 A DE 4220216A DE 4220216 C1 DE4220216 C1 DE 4220216C1
Authority
DE
Germany
Prior art keywords
bone
stem
endoprosthesis
characterized
spacer elements
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
DE19924220216
Other languages
German (de)
Inventor
Martin Schug
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.)
S and G IMPLANTS GmbH
Original Assignee
S and G IMPLANTS GmbH
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 S and G IMPLANTS GmbH filed Critical S and G IMPLANTS GmbH
Priority to DE19924220216 priority Critical patent/DE4220216C1/en
Application granted granted Critical
Publication of DE4220216C1 publication Critical patent/DE4220216C1/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30721Accessories
    • A61F2/30724Spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/58Materials at least partially resorbable by the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/32Joints for the hip
    • A61F2/36Femoral heads ; Femoral endoprostheses
    • A61F2/3609Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/32Joints for the hip
    • A61F2/36Femoral heads ; Femoral endoprostheses
    • A61F2/3662Femoral shafts
    • A61F2/3676Distal or diaphyseal parts of shafts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/30004The prosthesis made from materials having different values of a given property at different locations within the same prosthesis
    • A61F2002/30032The prosthesis made from materials having different values of a given property at different locations within the same prosthesis differing in absorbability or resorbability, i.e. in absorption or resorption time
    • A61F2002/30034The prosthesis made from materials having different values of a given property at different locations within the same prosthesis differing in absorbability or resorbability, i.e. in absorption or resorption time made from both resorbable and non-resorbable prosthetic parts, e.g. adjacent parts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/3006Properties of materials and coating materials
    • A61F2002/30062(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30721Accessories
    • A61F2/30734Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
    • A61F2002/30738Sleeves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2210/00Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2210/0004Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof bioabsorbable
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2250/00Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/003Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in adsorbability or resorbability, i.e. in adsorption or resorption time
    • A61F2250/0031Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in adsorbability or resorbability, i.e. in adsorption or resorption time made from both resorbable and non-resorbable prosthetic parts, e.g. adjacent parts

Abstract

Endoprosthesis, with a stem for anchoring into human bone tissue, has distance pieces (8, 10) of a bioresorbable material, to set the gap between the stem and the bone, pref. using polymers based on organic acids. USE/ADVANTAGE - The endoprosthesis distance rings maintain the required gap between the stem and the bone during and after surgery, without allowing the metal prosthesis to come into direct contact with the bone, or allowing the distance rings to remain in the body as foreign matter.

Description

Die Erfindung geht aus von einer Endoprothese mit einem Stiel zur Verankerung in einem menschlichen Knochen, und mit mindestens einem Distanzelement zur Festlegung des Zwi schenraums zwischen dem Stiel und dem Knochen. The invention relates to an endoprosthesis having a stem for anchoring in a human bone, and at least one spacer element to define the rule interim space between the stem and the bone.

Derartige Endoprothesen sind beispielsweise bekannt aus den US 48 27 919, US 47 18 909, US 45 49 319, US 44 04 692, DE 89 11 046, die einzementierbare Oberschenkelteile von Hüftprothesen betreffen. Such endoprostheses are known for example from US 48 27 919, US 47 18 909, US 45 49 319, US 44 04 692, DE 89 11 046 the einzementierbare thigh parts of hip replacements affect. Die Distanzelemente sitzen auf dem Stiel der Endopro these und dienen zur Festlegung eines gleichmäßigen Zwischen raums zwischen Endoprothese und Knochen, um einen möglichst gleichmäßig dicken Zementmantel um die Endoprothese herum zu verwirklichen. The spacer elements sitting on the stem of the Endopro synthesis and used to define a uniform gap between the endoprosthesis and bone, to realize a very uniformly thick cement mantle around the endoprosthesis around. Derartige bekann te Distanzelemente bestehen z. Such well-te spacer elements consist z. B. aus Polymethylmeta crylat (PMMA), sie werden zusammen mit der Endoprothese in den Knochen eingesetzt und verbleiben dort nach der Operation. B. from Polymethylmeta methacrylate (PMMA), they are used together with the endoprosthesis into the bone and remain there after the surgery.

Aus der DE 39 12 465 C1 ist es bekannt, Distanzelemente unterhalb des Kragens eines Oberschenkelteils einer Hüftgelenkendoprothese vorzusehen, wobei die Distanz elemente an eines Ring aus Kunststoffmaterial angeformt sind, der beim Einzementieren entfernt werden kann, so daß der Zement schließlich auch den ursprünglich von den Distanzelementen eingenommenen Raum ausfüllen kann. From DE 39 12 465 C1 it is known to provide spacer elements below the collar of a femoral part of a hip joint endoprosthesis, wherein the spacer elements are integrally formed on a ring of plastic material which can be removed during cementing, so that the cement finally the originally from the can fill spacers space occupied. Beim Entfernen der Distanzelemente und dem anschließen den Befüllen dieses Restvolumens mit Knochenzement läßt sich jedoch eine unerwünschte Positionsänderung der Endoprothese im Knochenhohlraum nicht zuverlässig aus schließen, so daß der erwünschte gleichmäßige Zement mantel nicht in allen Fällen sicher gewährleistet ist. When removing the spacers and connect the filling this residual volume with bone cement, however, an undesirable change in position of the endoprosthesis in the bone cavity can not be a reliable guide, so that the desired uniform cement is not coat safe in all cases guaranteed.

Aus der DE 28 50 586 C2 ist weiterhin eine Einlage bekannt, die zur Endoprothesenverankerung mittels eines Knochenzements in einem Knochenhohlraum dient und eine der Form des Knochenhohlraums angepaßte, für den noch nicht ausgehärteten Knochenzement un durchlässige Folie aus resorbierbaren Substanzen enthält. From DE 28 50 586 C2 an insert is furthermore known, which serves to Endoprothesenverankerung by means of a bone cement in a bone cavity and the shape of the bone cavity adapted, contains un permeable to the not yet hardened bone cement sheet of resorbable substances. Die Einlage wird nach dem Aushärten des Knochenzements durch Resor bierung der eingelagerten Substanzen teilweise durch das einge wachsene neue Knochengewebe durchdrungen. The insert is, after curing of the bone cement by Resor of the incorporated substances bierung partially through the ingrown new bone tissue penetrated.

Aufgabe der Erfindung ist es, eine Endoprothese der eingangs genannten Art derart weiterzubilden, daß die Distanzelemente den gewünschten Abstand zwischen Pro these und Knochen während und nach der Operation zu verlässig festlegen, ohne daß die metallische Prothese direkt in Berührung mit dem Knochen kommt oder die Distanzelemente als Fremdkörper im Körper verbleiben. The object of the invention is to develop an endoprosthesis of the type mentioned in such a way that the spacer elements define the desired distance between Pro synthesis and bones during and after surgery to reliably without the metallic prosthesis comes into direct contact with the bone or the spacer elements as foreign bodies remain in the body.

Diese Aufgabe wird bei der Endoprothese der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß das bzw. die Distanzelemente aus bioresorbierbarem Materi al bestehen. This object is achieved with the endoprosthesis of the type mentioned according to the invention characterized in that the or the spacer elements consist of bioresorbable Materi al.

Die Vorteile der Erfindung liegen insbesondere darin, daß die Distanzelemente aus einem Material bestehen, welches - in an sich bekannter Weise - bioresorbier bar ist und daher im menschlichen Körper, z. The advantages of the invention reside in particular in that the spacing elements consist of a material, which - in known manner - is bioresorbier bar, and therefore in the human body, for example. B. durch Hydrolyse, allmählich vollständig abgebaut wird. B. is gradually completely degraded by hydrolysis. Es ist dadurch gewährleistet, daß die Distanzelemente während und unmittelbar nach der Operation ihre Funk tion zuverlässig erfüllen und erst allmählich nach dem Festwerden des Knochenzements abgebaut werden, wobei dann nachwachsendes Knochengewebe die ursprüng lich von den Distanzelementen besetzten Volumina aus füllt. It is ensured that the spacer elements during and immediately after surgery their radio tion fulfill reliable and are only gradually degraded after setting of the bone cement, and then denuded bone tissue fills the originally Lich occupied by the spacer elements volumes from. Auf die bekannten, an der metallischen Endo prothese angeformten Distanzelemente, die zu uner wünschten Metall/Knochenkontakt führen, sowie auf die bekannten Distanzelemente aus Kunststoffmaterial, die als Fremdkörper im Knochen verbleiben und dort stören können, braucht daher nicht zurückgegriffen zu werden. prosthesis to the known, to the metallic Endo formed spacer elements that lead to unwanted desired metal / bone contact, as well as the known distance elements of plastic material that remain as foreign bodies in the bone and interfere there, therefore, need not be resorted to.

Besonders bevorzugt sind die Distanzelemente an dem Stiel befestigt, z. Particularly preferably, the spacer elements are secured to the stem, such. B. aufgesteckt. B. plugged. Alternativ lassen sich die Distanzelemente auch als Ring ausbilden oder auf einem Ring ausformen, der auf den Stiel auf gesteckt wird, um den Zwischenraum zwischen Stiel und Knochen für den Zementmantel zu realisieren. Alternatively, the spacer elements can also form a ring or shaping on a ring which is plugged onto the handle in order to realize the space between stem and bone for the cement mantle.

Am distalen Ende des Stiels läßt sich das Distanzele ment auch als Haube ausbilden, welches auf das freie Stielende aufgesteckt wird. At the distal end of the stem, the leaves Distanzele ment also form as a cap, which is attached to the free end of the handle.

Als bioresorbierbares Material lassen sich z. As a bioresorbable material to such leave. B. be kannte Polymere auf der Basis organischer Säuren, z. B. be known polymers based on organic acids, eg. B. Derivate der Milchsäure, Glykolsäure sowie deren Copolymere etc. einsetzen, vgl. B. Insert derivatives of lactic acid, glycolic acid, and copolymers thereof etc., see FIG. z. z. B. die Buchveröffent lichung "Macromoleculare Biomaterials", CRC Press 1984, S. 119 bis 142, "Bioresorbable Plastic Materials for Bone Surgery" oder "Clinical Materials" 1986, 1, S. 233 bis 257. B. the Buchveröffent lichung "Macro moleculare Biomaterials", CRC Press 1984, pp 119-142, "bioresorbable Plastic Materials for Bone Surgery" or "Clinical Materials", 1986, 1, pp 233-257.

Vorteilhafte Weiterbildungen der Erfindung sind durch die Merkmale der Unteransprüche gekennzeich net. Advantageous further developments of the invention are net gekennzeich by the features of the subclaims.

Im folgenden wird ein Ausführungsbeispiel der Er findung anhand der Zeichnung näher erläutert. The following is an exemplary embodiment of the invention is illustrated by the drawing.

Die Figur zeigt eine Seitenansicht eines Oberschen kelteils einer Hüftgelenkprothese. The figure shows a side view of an upper's kelteils a hip joint prosthesis.

Das Oberschenkelteil 2 einer Hüftgelenkprothese enthält einen Stiel 4 zur Verankerung der Prothese im Hohlraum des menschlichen Femurknochens. The upper leg section 2 of a hip joint prosthesis includes a stem 4 for anchoring the prosthesis in the cavity of the human femur. Der Stiel 4 besitzt ein distales, freies Ende 6 und an seinem proximalen Ende einen Kragen 12 , der mit seinem Umfang über den Schaft 4 übersteht und an seinem oberen Ende in einen Steckkonus 14 übergeht, auf den ein prothetischer Kopf aufsetzbar ist. The stem 4 has a distal, free end 6 and at its proximal end a collar 12 which projects with its periphery beyond the shank 4 and merges at its upper end in a plug-in cone 14, to which a prosthetic head is placed. Alternativ kann der Kragen 12 auch einstückig in einen Hals mit angeformtem Kopf übergehen, oder der Schaft 4 kann in anderer bekannter Weise mit dem prothetischen Kopf verbunden sein. Alternatively, the collar 12 may also be integrally merge into a neck with molded head or the shank 4 may be connected in other known manner to the prosthetic head.

Am distalen Ende 6 des Schafts oder Stiels 4 der Prothese ist ein erstes Distanzelement 8 angeord net, das als Haube ausgebildet ist, die auf das distale Ende 6 des Stiels 4 aufgesteckt ist. At the distal end 6 of the shank or stem of the prosthesis 4 is a first spacer element 8 angeord net which is formed as a hood which is fitted onto the distal end 6 of the stem. 4 Das Distanzelement 8 besteht aus bioresorbierbarem Material. The spacer element 8 consists of a bioresorbable material.

Unterhalb des Kragens ist ein zweites Distanzelement 10 angeordnet, welches z. Underneath the collar, a second spacer element 10 is arranged, which, for. B. als Ring 10 a mit ange formten, nach außen gerichteten Ansätzen 10 b ausge bildet ist. Is for example formed as a ring 10 a with integrally outwardly directed lugs 10 b out forms. Das zweite Distanzelement 10 besteht ebenfalls aus bioresorbierbarem Material. The second spacer 10 is also made of a bioresorbable material.

Das erste Distanzelement 8 dient zur Positionierung des distalen Stielendes 6 im Knochenhohlraum, während das zweite Distanzelement 10 dazu dient, die Pro these im Bereich der Resektionskante gegen den Kno chen zu positionieren, um dadurch Raum für einen gleichmäßigen Zwischenraum zu schaffen, der von Knochenzement ausgefüllt werden soll. The first spacer member 8 serves to position the distal stem end 6 in the bone cavity, while the second spacer element 10 serves the Pro synthesis in the field of Resektionskante against the bone density to move, thereby to make room for a uniform interspace filled with bone cement shall be. Als bioresor bierbares Material dienen z. As bioresor bierbares material for serving. B. Polymere auf der Ba sis organischer Säuren, z. B. polymers sis on the Ba organic acids such. B. Derivate der Milchsäure, Glykolsäure sowie deren Copolymere. For example, derivatives of lactic acid, glycolic acid, and copolymers thereof.

Claims (7)

1. Endoprothese mit einem Stiel zur Verankerung in einem menschlichen Knochen, und mit mindestens einem Distanzelement zur Festlegung des Zwischenraums zwischen dem Stiel und dem Knochen, dadurch gekennzeichnet, daß das bzw. die Distanzelemente ( 8 , 10 ) aus bioresorbierbarem Material bestehen. 1. endoprosthesis with a stem for anchoring in a human bone, and at least one spacer element for defining the gap between the stem and the bone, characterized in that the or the spacer elements (8, 10) are composed of bioresorbable material.
2. Endoprothese nach Anspruch 1, dadurch gekennzeichnet, daß die Distanzelemente ( 8 , 10 ) an dem Stiel ( 4 ) befestigt sind. 2. Endoprosthesis according to claim 1, characterized in that the spacer elements (8, 10) on the stem (4) are attached.
3. Endoprothese nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Distanzelemente ( 8 , 10 ) auf den Stiel ( 4 ) aufgesteckt sind. 3. An endoprosthesis according to claim 1 or 2, characterized in that the spacer elements (8, 10) on the stem (4) are attached.
4. Endoprothese nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Distanzelemente ( 10 ) als Ringe ausgebildet sind, die auf den Stiel ( 4 ) aufgesteckt sind. 4. Endoprosthesis according to one of the preceding claims, characterized in that the spacer elements (10) are formed as rings on the stem (4) are attached.
5. Endoprothese nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß ein Distanzelement ( 8 ) als Haube ausgebildet ist, die auf das distale Ende ( 6 ) des Stiels ( 4 ) aufgesteckt ist. 5. An endoprosthesis according to claim 3 or 4, characterized in that a spacer element (8) is designed as a hood, which on the distal end (6) of the stem (4) is fitted.
6. Endoprothese nach Anspruch 1, dadurch gekennzeichnet, daß die Distanzelemente als Ansätze ausgebildet sind, die am Stiel formschlüssig befe stigt sind. 6. An endoprosthesis according to claim 1, characterized in that the spacer elements are designed as lugs, which are positively BEFE Stigt lollies.
7. Endoprothese nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß das bioresorbierbare Ma terial Polymere auf der Basis organischer Säuren ent hält. 7. Endoprosthesis according to one of the preceding claims, characterized in that the bioresorbable polymers TERIAL Ma holds ent based on organic acids.
DE19924220216 1992-06-20 1992-06-20 Endoprosthesis - has bio-resorbable distance rings to set gap between prosthesis and bone Expired - Fee Related DE4220216C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19924220216 DE4220216C1 (en) 1992-06-20 1992-06-20 Endoprosthesis - has bio-resorbable distance rings to set gap between prosthesis and bone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19924220216 DE4220216C1 (en) 1992-06-20 1992-06-20 Endoprosthesis - has bio-resorbable distance rings to set gap between prosthesis and bone

Publications (1)

Publication Number Publication Date
DE4220216C1 true DE4220216C1 (en) 1994-01-13

Family

ID=6461442

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19924220216 Expired - Fee Related DE4220216C1 (en) 1992-06-20 1992-06-20 Endoprosthesis - has bio-resorbable distance rings to set gap between prosthesis and bone

Country Status (1)

Country Link
DE (1) DE4220216C1 (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0815809A3 (en) * 1996-06-28 1998-08-12 Johnson & Johnson Professional, Inc. Prosthesis with variable fit and strain distribution
WO1999048445A1 (en) * 1998-03-24 1999-09-30 Depuy International Limited An end cap spacer for a joint prosthesis
EP1419749A1 (en) * 2002-11-18 2004-05-19 Toshinobu Katsuya Distal tip for the positioning of artificial joint stem
WO2004071356A2 (en) * 2003-02-10 2004-08-26 Smith & Nephew, Inc. Resorbable devices
EP1522280A2 (en) * 2003-09-12 2005-04-13 Toshinobu Katsuya Medial/distal tip for artificial joint
US8722783B2 (en) 2006-11-30 2014-05-13 Smith & Nephew, Inc. Fiber reinforced composite material
US9000066B2 (en) 2007-04-19 2015-04-07 Smith & Nephew, Inc. Multi-modal shape memory polymers
US9120919B2 (en) 2003-12-23 2015-09-01 Smith & Nephew, Inc. Tunable segmented polyacetal
US9770534B2 (en) 2007-04-19 2017-09-26 Smith & Nephew, Inc. Graft fixation
US9815240B2 (en) 2007-04-18 2017-11-14 Smith & Nephew, Inc. Expansion moulding of shape memory polymers

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2850586C2 (en) * 1978-11-22 1982-05-27 Battelle-Institut E.V., 6000 Frankfurt, De
US4404692A (en) * 1981-09-14 1983-09-20 Eftekhar Nas S Centering system for hip replacement
US4549319A (en) * 1982-08-03 1985-10-29 United States Medical Corporation Artificial joint fixation to bone
US4718909A (en) * 1985-07-16 1988-01-12 Brown Byron L Method and apparatus for cementing a femoral stem prosthesis within a femoral canal
US4827219A (en) * 1988-01-07 1989-05-02 The Regents Of The University Of California Remotely adjustable MRI RF coil impedance matching circuit with mutualy coupled resonators
DE8911046U1 (en) * 1988-09-14 1990-02-08 Pfizer Hospital Products Group, Inc., New York, N.Y., Us
DE3912465C1 (en) * 1989-04-15 1990-11-08 Orthoplant Endoprothetik Gmbh, 2800 Bremen, De

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2850586C2 (en) * 1978-11-22 1982-05-27 Battelle-Institut E.V., 6000 Frankfurt, De
US4404692A (en) * 1981-09-14 1983-09-20 Eftekhar Nas S Centering system for hip replacement
US4549319A (en) * 1982-08-03 1985-10-29 United States Medical Corporation Artificial joint fixation to bone
US4718909A (en) * 1985-07-16 1988-01-12 Brown Byron L Method and apparatus for cementing a femoral stem prosthesis within a femoral canal
US4827219A (en) * 1988-01-07 1989-05-02 The Regents Of The University Of California Remotely adjustable MRI RF coil impedance matching circuit with mutualy coupled resonators
DE8911046U1 (en) * 1988-09-14 1990-02-08 Pfizer Hospital Products Group, Inc., New York, N.Y., Us
DE3912465C1 (en) * 1989-04-15 1990-11-08 Orthoplant Endoprothetik Gmbh, 2800 Bremen, De

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0815809A3 (en) * 1996-06-28 1998-08-12 Johnson & Johnson Professional, Inc. Prosthesis with variable fit and strain distribution
WO1999048445A1 (en) * 1998-03-24 1999-09-30 Depuy International Limited An end cap spacer for a joint prosthesis
EP1419749A1 (en) * 2002-11-18 2004-05-19 Toshinobu Katsuya Distal tip for the positioning of artificial joint stem
WO2004071356A2 (en) * 2003-02-10 2004-08-26 Smith & Nephew, Inc. Resorbable devices
WO2004071356A3 (en) * 2003-02-10 2004-12-23 David C Kelman Resorbable devices
EP1522280A2 (en) * 2003-09-12 2005-04-13 Toshinobu Katsuya Medial/distal tip for artificial joint
EP1522280A3 (en) * 2003-09-12 2005-10-26 Senko Medical Instrument Mig. Co., Ltd. Medial/distal tip for artificial joint
US9120919B2 (en) 2003-12-23 2015-09-01 Smith & Nephew, Inc. Tunable segmented polyacetal
US8722783B2 (en) 2006-11-30 2014-05-13 Smith & Nephew, Inc. Fiber reinforced composite material
US9815240B2 (en) 2007-04-18 2017-11-14 Smith & Nephew, Inc. Expansion moulding of shape memory polymers
US9000066B2 (en) 2007-04-19 2015-04-07 Smith & Nephew, Inc. Multi-modal shape memory polymers
US9308293B2 (en) 2007-04-19 2016-04-12 Smith & Nephew, Inc. Multi-modal shape memory polymers
US9770534B2 (en) 2007-04-19 2017-09-26 Smith & Nephew, Inc. Graft fixation

Similar Documents

Publication Publication Date Title
US4881536A (en) Method and apparatus for prosthesis placement
DE69822266T2 (en) Modular elbow prosthesis
EP1464298B1 (en) Method for the manufacturing of implant superstructures and superstructure for dental implant
EP0135755B1 (en) Stem for a hip joint prosthesis
EP1642552B1 (en) Endoprothesis for a metatarsophalangeal joint
EP0598964B1 (en) Bone cement dispenser body for implant fixation
DE2925089C2 (en)
DE69926219T2 (en) Stent with variabelen properties
EP0074981B1 (en) Joint prosthesis
DE69913339T2 (en) An apparatus for replacing a hip
EP0204919B1 (en) Prosthesis of the head of the femur
DE4223153C2 (en) For attaching a prosthesis to the jaw serving implant
DE4414426C1 (en) Joint prosthesis e.g. for finger joint
DE60019558T3 (en) Expandable intervertebral distance piece
EP0283706B1 (en) Hip prosthesis
DE69631396T2 (en) Modular surgical implant
EP0058745B1 (en) Straight blade like shaft for a joint endoprosthesis
DE60220249T2 (en) Spinal implant from bone material
EP0267926B1 (en) Tooth-root implant with long-term resistance to repetitive stresses
DE69935399T2 (en) Proximal femoral sleeve for a Revisionshüftprothese
EP1509175B1 (en) Dilatable balloon implant
US5437834A (en) Porous living body repairing member, and a method of imparting elasticity to it
DE60111703T2 (en) modular hip prosthesis
EP0169978B1 (en) Endoprosthesis with an interior and exterior part for a hip joint cup
DE19949285C2 (en) bone screw

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