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DE3439993C2 - Implant for supplying amputation stumps - Google Patents

Implant for supplying amputation stumps

Info

Publication number
DE3439993C2
DE3439993C2 DE19843439993 DE3439993A DE3439993C2 DE 3439993 C2 DE3439993 C2 DE 3439993C2 DE 19843439993 DE19843439993 DE 19843439993 DE 3439993 A DE3439993 A DE 3439993A DE 3439993 C2 DE3439993 C2 DE 3439993C2
Authority
DE
Germany
Prior art keywords
implant
ceramic ring
implant according
ceramic
ring
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
Application number
DE19843439993
Other languages
German (de)
Other versions
DE3439993A1 (en
Inventor
Winfried Dr.med. 8900 Augsburg Gradl
Günther Dipl.-Phys. Dr. 6940 Weinheim Heimke
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.)
Gradl Winfried Drmed 86199 Augsburg De
Original Assignee
Friedrichsfeld GmbH Steinzeug und Kunststoffwerke
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 Friedrichsfeld GmbH Steinzeug und Kunststoffwerke filed Critical Friedrichsfeld GmbH Steinzeug und Kunststoffwerke
Priority to DE19843439993 priority Critical patent/DE3439993C2/en
Publication of DE3439993A1 publication Critical patent/DE3439993A1/en
Application granted granted Critical
Publication of DE3439993C2 publication Critical patent/DE3439993C2/en
Expired 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
    • A61F2/28—Bones
    • A61F2/2814—Bone stump caps
    • 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
    • A61F2/30721—Accessories
    • A61F2/30749—Fixation appliances for connecting prostheses to the body
    • 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
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/302—Three-dimensional shapes toroidal, e.g. rings
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30795—Blind bores, e.g. of circular cross-section
    • A61F2002/30797—Blind bores, e.g. of circular cross-section internally-threaded
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3082—Grooves
    • A61F2002/30827—Plurality of grooves
    • A61F2002/30828—Plurality of grooves parallel
    • 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3085—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0065—Three-dimensional shapes toroidal, e.g. ring-shaped, doughnut-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00179—Ceramics or ceramic-like structures
    • A61F2310/00185—Ceramics or ceramic-like structures based on metal oxides
    • A61F2310/00203—Ceramics or ceramic-like structures based on metal oxides containing alumina or aluminium oxide
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00179—Ceramics or ceramic-like structures
    • A61F2310/00293—Ceramics or ceramic-like structures containing a phosphorus-containing compound, e.g. apatite

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

Es wird ein Implantat zum Versorgen von Amputationsstümpfen vorgesehen, das mit einem Schaftteil aus Metall im Markraum des verbliebenen Röhrenknochens verankert wird, das im Bereich des Austritts aus dem Röhrenknochen einen Ring aus Keramik aufweist, der dem Schaftteil bakteriendicht anliegt und an seiner Außenseite eine Nut aufweist, die am distalen Ende des Röhrenknochens in unmittelbarer Umgebung des Ringes durch Anwachsen befestigte Haut aufnimmt, und das darüberhinaus Mittel zum kraftschlüssigen Befestigen äußerer Prothesenteile aufweist. Der Schaft des Implantates besteht vorteilhaft aus Titan, der Ring aus dichter Al2O3- oder Kalziumphosphatkeramik.An implant is provided for the treatment of amputation stumps, which is anchored in the medullary canal of the remaining long bone with a metal shaft part, which has a ceramic ring in the area of the exit from the long bone, which rests bacteria-tight on the shaft part and has a groove on its outside which receives skin attached by growth at the distal end of the long bone in the immediate vicinity of the ring, and which also has means for frictionally attaching external parts of the prosthesis. The shaft of the implant is advantageously made of titanium, the ring of dense Al2O3 or calcium phosphate ceramic.

Description

Die Erfindung betrifft Implantate zur Versorgung von Amputationsstümpfen nach dem Oberbegriff des Anspruchs 1.The invention relates to implants for the supply of amputation stumps according to the preamble of Claim 1.

Die Versorgung von Amputationsstümpfen an Gliedmaßen erfolgt heute so, daß möglichst viel Weichgewebebestandteile um den knöchernen Amputationsstumpf herumgelegt werden. Die Lasteinleitung von der äußeren Prothese auf die verbliebenen Skelettbestandteile des Patienten erfolgt durch Einbettung des weichgeweblich umschiedenen knöchernen Stumpfes in ein topfartig ausgebildetes, den Amputationsstumpf möglichst zylinderförmig eng umgebendes Teil der äußeren Prothese. Die Lasteinleitung von der äußeren Prothese in den Amputationsstumpf erfolgt weitgehend über Reibungskräfte in der Grenzfläche zwischen dem Stumpf und dem Zylindermantel des topfförmigen Teils der äußeren Prothese. — Diese Form der Stumpfversorgung hat jedoch den Nachteil, daß die beteiligten Hautpartien des Patienten in an sich unphysioiogischer Weise beiastet und daher häufig überlastet werden, was zu Schwielenbildung und zu Entzündungen führt. Dies hinwiederum macht die ständige Anpassung des Prothesenlagers an die sich ändernden Hautverhältnisse notwendig.The supply of amputation stumps on limbs takes place today in such a way that as many soft tissue components as possible be placed around the bony amputation stump. The load introduction from the external Prosthesis on the remaining skeletal components of the patient is made by embedding the soft tissue differentiated bony stump into a pot-shaped, the amputation stump if possible Cylindrical closely surrounding part of the external prosthesis. The load application from the external prosthesis into the amputation stump occurs largely via frictional forces in the interface between the stump and the cylinder jacket of the cup-shaped part of the outer prosthesis. - This form of residual limb restoration however, it has the disadvantage that the patient's skin parts involved become attached in an inherently unphysioiogical manner and therefore often overworked, resulting in callus formation and inflammation. This in turn makes the constant adjustment of the prosthesis bearing to the changing skin conditions necessary.

Aus der DE-OS 31 25 268 ist bekannt, die mechanische Irritation des Weichgewebelagers zwischen dem distalen Ende des Oberschenkelknochens und dem abstützenden Polster der externen Prothese dadurch zu mildern, daß in den Femur-Knochenstumpf ein Implantat mit einem Schaft eingeführt wird, an dessen unterem Ende sich eine Verdickung befindet die am unteren Ab-Schluß des Knochenstumpfes anliegt Dadurch soll eine gleichmäßigere Verteilung der Kräfte auf das Weichgewebelager und damit eine Herabsetzung der Gewebeirritationen erreicht werden. — Ein solches Implantat mildert also nur die imphysiologische Überlastung der beteiligten Weichgewebe- und Hautpartien.From DE-OS 31 25 268 is known, the mechanical irritation of the soft tissue bearing between the the distal end of the femur and the supporting pad of the external prosthesis thereby mitigate that in the femoral bone stump an implant is introduced with a shaft, at the lower end of which there is a thickening at the lower end of the bone stump is in contact and thus a reduction in tissue irritation can be achieved. - Such an implant mitigates so only the physiological overload of the soft tissue and skin areas involved.

Aufgabe der Erfindung war daher, ein Implantat zu schaffen, das es gestattet die Lasten direkt in den verbliebenen Teil des angrenzenden Röhrenknochens einzuleiten, einen dauerhaften bakteriendichten Abschluß zwischen der Haut und dem die Haut durchbrechenden Implantat zu gewährleisten und die an einem externen Prothesenteil angreifenden Lasten in den verbliebenen Teil des Röhrenknochens einzuleiten.The object of the invention was therefore to create an implant that allows the loads to be carried directly into the remaining ones To initiate part of the adjacent long bone, a permanent bacteria-proof seal to ensure between the skin and the skin penetrating implant and to an external one Initiate loads acting on the prosthesis part in the remaining part of the long bone.

Die Lösung der Aufgabe geschieht durch die im kennzeichnenden Teil des Anspruchs 1 angegebenen Merkmale. Weitere besondere Ausführungsarten des Implantats sind in den Unteransprüchen angegeben.The problem is solved by the features specified in the characterizing part of claim 1. Further special types of implementation of the implant are specified in the subclaims.

Die direkte Einleitung der Lasten vom knöchernen Stumpf in ein externes Prothesenteil, d.h. ohne den Lastübergang durch die weichgewebliche Umscheidung und die beteiligten Hautpartien, wird dadurch möglich, daß der proximale Schaftbereich an seiner Oberfläche Verankerungselemente 4 aufweist, die die Lasteinleitung vom Knochenstumpf in diesen Schaftbereich gewährleisten, daß der distale Schaftbereich 3 im Innern durch den Keramikring 5 hindurch in den Außenraum ragt und dort Mittel 6 zum Anschluß der externen Prothese angeordnet sind. — Damit können auch umgekehrt die an dem externen Prothesenteil angreifenden Lasten direkt in den verbliebenen Teil des Röhrenknochens eingeleitet werden. — Der bakteriendichte Abschluß dieser Hautdurchführung wird durch den Keramikring 5, ggf. mit Anbringung der Nut 8 und Beachtung der Festlegungen für die Abmessungsverhältnisse an den Enden 9 und des Ringes gewährleistet.The direct introduction of loads from the bony stump into an external part of the prosthesis, i.e. without the Load transfer through the soft tissue sheath and the skin areas involved is possible, that the proximal shaft area has anchoring elements 4 on its surface, which initiate the load from the bone stump to this shaft area ensure that the distal shaft area 3 is inside protrudes through the ceramic ring 5 into the outer space and there means 6 for connecting the external prosthesis are arranged. - In this way, conversely, those acting on the external prosthesis part can also be used Loads are introduced directly into the remaining part of the long bone. - The bacteria-proof closure this skin penetration is through the ceramic ring 5, if necessary with the attachment of the groove 8 and attention the specifications for the dimensional relationships at the ends 9 and the ring guaranteed.

Das erfindungsgemäße Implantat wird anhand der F i g. 1 näher beispielhaft erläutert:The implant according to the invention is illustrated with reference to FIGS. 1 explained in more detail as an example:

Der obere Teil der F i g. 1 stellt einen Schnitt durch die Achse des Implantates dar. Darin verweist die Nummer 1 auf den Schaft, die Nummer 2 auf seinen proximalen und die Nummer 3 auf seinen distalen Bereich. Die Nummer 4 verweist auf die Verankerungselemente, die Nummer 5 auf den Keramikring und die Nummer 6 auf die Mittel zum kraftschlüssigen Anschluß eines externen Prothesenteils, das im Beispiel der F i g. 1 in Form eines ein Innengewinde tragenden Sacklochs ausgeführt ist. Der untere Teil der F i g. 1 stellt einen Querschnitt durch den Schaft 1 in Höhe der Verankerungselemente 4 dar. Darin bedeutet die Nummer 7 die achsparallelen Nuten. Sie dienen dazu, das Einschrauben des Schaftes in den Markraum des verbliebenen Knochenstumpfes zu erleichtern, da sich in diesen Nuten noch ggf. entstehende Abriebpartikel sammeln können. Sie dienen aber weiterhin dazu nach Einwachsen von Knochengewebe eine Drehstabilisierung des Prothesenschaftes; im angrenzenden Röhrenknochenstumpf zu gewährleisten.The upper part of FIG. 1 shows a section through the axis of the implant. In it, the number 1 refers to the shaft, the number 2 to its proximal area and the number 3 to its distal area. The number 4 refers to the anchoring elements, the number 5 to the ceramic ring and the number 6 to the means for the non-positive connection of an external prosthesis part, which in the example of FIG. 1 is designed in the form of a blind hole carrying an internal thread. The lower part of FIG. 1 shows a cross-section through the shaft 1 at the level of the anchoring elements 4. Here, the number 7 denotes the axially parallel grooves. They serve to make it easier to screw the shaft into the medullary canal of the remaining bone stump, since any abrasion particles that may still arise can collect in these grooves. However, they still serve to stabilize the rotation of the prosthesis shaft after bone tissue has grown in; to ensure in the adjacent long bone stump.

Die Nummer 8 verweist auf die Ringnut an der Außenseite des Keramikringes. Im Bereich dieser Ringnut ist es vorteilhaft die Keramik hochglanzzupolieren, um eine sichere und bakteriendichte Anlagerung der Haut zu gewährleisten. Die Hautkeramikgrenzfläche ist vor unmittelbaren Lasteinwirkungen von Lasten, die parallel zur Achse des Implantats wirken, geschützt. Die bei-The number 8 refers to the ring groove on the outside of the ceramic ring. In the area of this ring groove it is advantageous to polish the ceramic to a high gloss in order to ensure a safe and bacteria-proof deposit on the skin to ensure. The skin-ceramic interface is facing direct loads from loads that are parallel act on the axis of the implant, protected. The two

den Nummern 9 und 10 verweisen auf das proximale und distale Ende des Keramikringes 5. Die Ausführung des proximalen Endes 9 des Keramikringes 5 mit einem kleineren Durchmesser dient dazu die Haut möglichst spannungsfrei von dem entsprechend zugearbeiteten Ende des Röhrenknochens, der etwa so gestaltet werden soll, daß seine Oberfläche weitgehend absatzfrei in die Oberfläche des Keramikringes 5 an seiner proximalen Seite übergeht, anzulagern. Dabei werden medizinische Maßnahmen ergriffen, die bewirken, daß die Haut auf dem entsprechend zugearbeiteten Ende des Knochenstumpfes aufwächstNumbers 9 and 10 refer to the proximal and distal ends of the ceramic ring 5. The execution of the proximal end 9 of the ceramic ring 5 with a smaller diameter, the skin is used as much as possible tension-free from the correspondingly worked end of the long bone, which can be shaped like this should that its surface largely free of steps into the surface of the ceramic ring 5 at its proximal Page passes over to attach. Doing this will be medical Measures taken that cause the skin on the appropriately machined end of the bone stump grows up

In F i g. 2 wird das gleiche Implantat wie in F i g. 1 nochmals gezeigt, bei der die Verankerungselemente 4 den Querschnitt der Gewindegänge darstellen. Dies stellt eine besondere Ausführungsform der Verankerungselemente dar. Die Verbindung zwischen dem Schaft aus Metall 1 und dem Keramikring 5 wurde nach !■ dem Stand der Technik lotfrei ausgeführt Dies ist bell sonders günstig, wenn der Schaft aus Metall 1 aus derIn Fig. 2 is the same implant as in FIG. 1 is shown again, in which the anchoring elements 4 represent the cross-section of the threads. This represents a special embodiment of the anchoring elements The connection between the shaft made of metal 1 and the ceramic ring 5 was after ! ■ The prior art executed without soldering. This is particularly advantageous if the metal shaft 1 is made of the

ψ hochfesten Titanlegierung besteht Derartige lotfreie ψ Such a high-strength titanium alloy is free of solder

|i Verbindungen, die zugleich vakuum- und damit bakte-| i connections that are both vacuum and thus bacterial

B riendicht sind, zwischen Titan und Titanlegierungen ei-Are brimproof, between titanium and titanium alloys

Ij nerseits und den hier in Frage kommenden KeramikenOn the other hand, and the ceramics that come into question here

ψ wie AbOa-Keramik und Hydroxylapatitkeramik ande- ψ like AbOa ceramics and hydroxyapatite ceramics other-

j| rerseits, gehören zum Stand der Technik.j | on the other hand, belong to the state of the art.

pi Der Vorteil des erfindungsgemäßen Implantats zurpi The advantage of the implant according to the invention for

Κι Versorgung von Amputationsstümpfen im Vergleich zuΚι supply of amputation stumps compared to

jj der bisherigen Art der Stumpfversorgung besteht darin,jj the previous type of residual limb restoration consists of

ϊ| daß die Krafteileitung über Weichgewebeschichten undϊ | that the power transmission via soft tissue layers and

I über die Haut vermieden wird. Es kann vielmehr eineI avoided over the skin. Rather, it can be a

ύ direkte Lasteinleitung von dem externen Prothesenteil ύ direct load application from the external part of the prosthesis

p in den verbleibenden Knochenteil des Amputations-p in the remaining bone part of the amputation

i| stumpfes erfolgen. Die Belastung des Skelettes bzw. deri | done blunt. The load on the skeleton or the

■| verbliebenen Skeletteile kann daher weitgehend physio-■ | remaining skeletal parts can therefore largely physiologically

^ί logisch erhalten bleiben.^ ί remain logically.

'[■; Eine solche Art der Stumpfversorgung mit direkter,'[■; Such a type of residual limb restoration with direct,

;' kraftschlüssiger Befestigung des externen Prothesentei-; ' non-positive fastening of the external prosthesis part

f, les am verbliebenen Skeletteil ist auch die Vorausset-f, the remaining part of the skeleton is also the prerequisite

ψ zung dafür, daß das externe Prothesenteil Bewegungs- ψ tion that the external part of the prosthesis

l| elemente enthalten kann, die durch aus der entsprechen-l | may contain elements that are determined by the corresponding

|| den Extremität auszukoppelnde neutrophysiologische|| Neutrophysiological to be decoupled from the extremity

ψ Signale in anatomisch und funktionell angepaßter Weise ψ Signals in an anatomically and functionally adapted manner

p gesteuert werden.p can be controlled.

fifi

κ Hierzu 2 Blatt Zeichnungenκ For this 2 sheets of drawings

6060

6565

Claims (7)

Patentansprüche:Patent claims: 1. Implantat zur Versorgung von Ämputationsstümpfen, das einen in den verbliebenen Teil des angrenzenden Röhrenknochens einzufügenden proximalen Schaftbereich mit Verankerungselementen und einen aus dem Röhrenknochen herausragenden, distalen Schaftbereich aufweist, dadurch gekennzeichnet, daß der Schaft 1 aus Metall besteht, die Verankerungselemente 4 sich an der Oberfläche des in den Röhrenknochen einzufügenden proximalen Schaftbereich 2 befinden, der distale Schaftbereich 3 auf seinem Umfang einen Keramikring 5 trägt, der an seinem distalen Ende 3 Mittel 6 zum kraftschlüssigen Anschluß eines externen Prothesenteils aufweist1. Implant for restoring amputation stumps, the one proximal to be inserted into the remaining part of the adjacent long bone Shaft area with anchoring elements and a protruding from the long bone, having distal shaft area, characterized in that the shaft 1 consists of metal, the anchoring elements 4 are located on the surface of the tubular bone to be inserted proximal shaft area 2 are located, the distal shaft area 3 has a ceramic ring on its circumference 5 carries, which at its distal end 3 means 6 for the frictional connection of an external prosthesis part having 2. Implantat nach Anspruch 1, dadurch gekennzeichnet, daß die Verankerungselemente 4 aus einem Gewinde, das von achsparallelen Längsnuten 7 durchsetzt ist, bestehen.2. Implant according to claim 1, characterized in that the anchoring elements 4 consist of a thread which is penetrated by axially parallel longitudinal grooves 7. 3. Implantat nach Anspruch 1, dadurch gekennzeichnet, daß der Keramikring 5 auf seiner Außenseite eine Ringnut 8 aufweist3. Implant according to claim 1, characterized in that the ceramic ring 5 on its outside has an annular groove 8 4. Implantat nach Anspruch 3, dadurch gekennzeichnet daß der Durchmesser des Keramikringes 5 proximalseitig 9 der Ringnut 8 kleiner ist als am distalen Ende 10 des Keramik-Ringes 5.4. Implant according to claim 3, characterized in that the diameter of the ceramic ring 5 on the proximal side 9 of the annular groove 8 is smaller than on the distal end 10 of the ceramic ring 5. 5. Implantat nach Anspruch 1, dadurch gekennzeichnet, daß der Keramikring 5 aus Al2O3- Keramik besteht.5. Implant according to claim 1, characterized in that the ceramic ring 5 consists of Al 2 O 3 - ceramic. 6. Implantat nach Anspruch 1, dadurch gekennzeichnet daß der Keramikring 5 aus Ca-Phosphatkeramik besteht.6. Implant according to claim 1, characterized in that the ceramic ring 5 made of calcium phosphate ceramic consists. 7. Implantat nach Anspruch 1, dadurch gekennzeichnet, daß das Mittel 6 zum kraftschlüssigen Anschluß aus einem Sackloch mit Innengewinde besteht. 7. Implant according to claim 1, characterized in that the means 6 for the frictional connection consists of a blind hole with an internal thread.
DE19843439993 1984-11-02 1984-11-02 Implant for supplying amputation stumps Expired DE3439993C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19843439993 DE3439993C2 (en) 1984-11-02 1984-11-02 Implant for supplying amputation stumps

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Application Number Priority Date Filing Date Title
DE19843439993 DE3439993C2 (en) 1984-11-02 1984-11-02 Implant for supplying amputation stumps

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DE3439993A1 DE3439993A1 (en) 1986-05-28
DE3439993C2 true DE3439993C2 (en) 1986-12-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8703120U1 (en) * 1987-02-26 1987-07-02 Mecron Medizinische Produkte Gmbh, 1000 Berlin Stump cap

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666982B1 (en) * 1990-09-21 1993-06-25 Impact ORTHOPEDIC ENDOPROSTHESIS OF LIMB MUTTER LIMIT.
GB0015479D0 (en) 2000-06-23 2000-08-16 Univ London Transcutaneous Prosthesis
US7972384B2 (en) 2008-02-05 2011-07-05 Douglas Eric Parsell Amputation stabilization device
GB2488759A (en) * 2011-03-01 2012-09-12 Angus Everett Strover Intramedullar implant for prosthetic limb attachment
SG11201608621QA (en) * 2014-04-16 2016-11-29 Osseointegration Holdings Pty Ltd An osseointegrable device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3125268C2 (en) * 1981-06-24 1984-04-12 C. Nicolai GmbH & Co KG, 3000 Hannover Implant

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8703120U1 (en) * 1987-02-26 1987-07-02 Mecron Medizinische Produkte Gmbh, 1000 Berlin Stump cap

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