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DE3439993A1 - Implant for care of amputation stumps - Google Patents

Implant for care of amputation stumps

Info

Publication number
DE3439993A1
DE3439993A1 DE19843439993 DE3439993A DE3439993A1 DE 3439993 A1 DE3439993 A1 DE 3439993A1 DE 19843439993 DE19843439993 DE 19843439993 DE 3439993 A DE3439993 A DE 3439993A DE 3439993 A1 DE3439993 A1 DE 3439993A1
Authority
DE
Germany
Prior art keywords
implant
ring
ceramic
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.)
Granted
Application number
DE19843439993
Other languages
German (de)
Other versions
DE3439993C2 (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

There is provided an implant for care of amputation stumps which is anchored by means of a metallic shaft part in the medullary space of the remaining tubular bone, which has a ceramic ring in the region of emergence from the tubular bone, the ring resting in a bacteria-tight manner against the shaft part and having a groove on its outside which receives grown-on skin on the distal end of the tubular bone in the immediate vicinity of the ring, and which furthermore has means for the non-positive connection of external prosthetic parts. The shaft of the implant is preferably made of titanium, while the ring is made of a dense Al2O3 or calcium phosphate ceramic.

Description

IMPLANTAT ZUR VERSORGUNG VON AMPUTATIONSSTÜMPFEN"IMPLANT FOR SUPPLYING AMPUTATION STUDS "

Die Erfindung betrifft Implantate zur Versorgung von Amputationsstümpfen.The invention relates to implants for supplying amputation stumps.

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 unphysiologischer Weise belastet 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 so that as much soft tissue as possible around the bony amputation stump to be laid around. The load transfer from the external prosthesis to the remaining ones Skeletal components of the patient are made by embedding the soft tissue bony stump into a pot-shaped, the amputation stump if possible Cylindrical closely surrounding part of the external prosthesis. The load introduction of The external prosthesis in the amputation stump is largely carried out by means of frictional forces in the interface between the stump and the cylinder jacket of the cup-shaped part the external prosthesis. - However, this form of residual limb restoration has the disadvantage that the skin parts of the patient involved in itself in an unphysiological way stressed and therefore often overworked, causing calluses and inflammation leads. This in turn makes the constant adjustment of the prosthesis bearing to the changing skin conditions necessary.

Aufgabe der Erfindung war daher, eine Prothese zu schaffen, die es gestattet die Lasten direkt in den verbliebenen Teil des angrenzenden Röhrenknochens einzuleiten. Eine weitere Aufgabe der Erfindung war, ein Hautabschlußteil an der Prothese zu finden, das dauerhaft einen bakteriendichten Abschluß zwischen der Haut und der die Haut durchbrechenden Prothese gewährleistet. Darüberhinaus war es Aufgabe der Erfindung ein Mittel vorzusehen, durch welches die an der äußeren Prothese angreifenden Lasten in den verbliebenen Teil des Röhrenknochens eingeleitet werden können.The object of the invention was therefore to create a prosthesis that allows the loads directly into the remaining part of the adjacent long bone initiate. Another object of the invention was to provide a skin termination part on the Finding a prosthesis that is a permanent bacteria-proof seal between the skin and the prosthesis that pierces the skin. In addition, it was a task of the invention to provide a means by which the engaging the external prosthesis Loads can be introduced into the remaining part of the long bone.

Die Lösung der Aufgabe geschieht durch das im ersten Anspruch beschriebene Implantat zur Versorgung von Amputationsstümpfen und die darin genannte Kombination ihrer Bestandteile. Weitere Ausführungsformen des Implantats zur Versorgung von Amputationsstümpfen sind in den Unteransprüchen erwähnt.The problem is solved by what is described in the first claim Implant for supplying amputation stumps and the combination mentioned therein their constituent parts. Further embodiments of the implant for the supply of Amputation stumps are mentioned in the subclaims.

Das erfindungsgemäße Implantat wird anhand der Fig. 1 näher beispielhaft erläutert: Der obere Teil der Fig. 1 stellt einen Schnitt durch die Achse des Implantates dar. Darin verweist die Nummer 1 auf den Schaft, die Nummer 2 auf sein proximales und die Nummer 3 aud sein distales Ende. Die Nummer 4 verweist auf die Verankerungselemente, die Nummer 5 auf den Keramikring und die Nummer 6 auf die Möglichkeit zum kraftschlüssigen Anschluß eines externen Prothesenteils, das im Beispiel der Fig. 1 in Form eines ein Innengewinde tragendes Sackloch ausgefüllt ist. Der untere Teil der Fig. 1 stellt einen Querschnitt durch den Schaft 1 in Höhe der Verankerungselemente 4 dar. Darin bedeutet 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 implant according to the invention is exemplified in greater detail with reference to FIG. 1 explained: The upper part of FIG. 1 represents a section through the axis of the implant In it, the number 1 refers to the shaft, the number 2 to its proximal and the number 3 on its distal end. The number 4 refers to the anchoring elements, the number 5 on the ceramic ring and the number 6 on the possibility of frictional locking Connection of an external prosthesis part, which in the example of FIG. 1 in the form of a a blind hole carrying an internal thread is filled. The lower part of Fig. 1 represents a cross-section through the shaft 1 at the level of the anchoring elements 4 Number 7 means the axially parallel grooves. They are used to screw in the To facilitate the shaft into the medullary canal of the remaining bone stump, since Abrasion particles may still be able to collect in these grooves. You serve but continues to rotate stabilization of the after ingrowth of bone tissue To ensure the prosthesis shaft 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 beiden Nummern 9 und 10 verweisen auf das proximale und distale Ende des Keramikringes. Die Ausführung des proximalen Endes des Keramikringes mit einem kleineren Durchmesser dient dazu die Haut möglichst spannungs frei von dem entsprechend zugearbeiteten Ende des Röhrenknochens, der etwa so gestaltet werden soll, daß seine Oberfläche weitgehend absatzfrei in die Oberfläche des Keramikringes an seiner proximalen Seite übergeht, anzulagern. Dabei werden medizinische Maßnahmen ergriffen, die bewirken, daß die Haut auf dem entsprechend zugearbeiteten Ende des Knochenstumpfes aufwächst.The number 8 refers to the ring groove on the outside of the ceramic ring. In the area of this annular groove, it is advantageous to polish the ceramic to a high gloss in order to to ensure a safe and bacteria-proof deposition of the skin. The skin-ceramic interface is against direct loads from loads that are parallel to the axis of the implant act, protected. The two numbers 9 and 10 refer to the proximal and distal End of the ceramic ring. The execution of the proximal end of the ceramic ring with With a smaller diameter, the skin is used as tension-free as possible appropriately machined end of the long bone, which can be shaped like this should that its surface is largely free of discontinuities in the surface of the ceramic ring at its proximal Page passes over to attach. Doing this will be medical Measures taken that cause the skin to be appropriately crafted End of the bone stump grows up.

In Fig. 2 wird die gleiche Prothese wie in Fig. 1 nochmals gezeigt, bei der die Verankerungselemente 4 den Querschnitt der Gewindegänge darstellen. Dies stellt eine besondere Ausfü.hrungsform 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 besonders günstig, wenn der Schaft aus Metall 1 aus der hochfesten Titanlegierung besteht. Derartige lotfreie Verbindungen, die zugleich vakuum-und damit bakteriendicht sind, zwischen Titan und Titanlegierungen und den hier in Frage kommenden Keramiken wie A1203-Keramik und Hydroxylapatitkeramik andererseits, gehören zum Stand der Technik.In Fig. 2 the same prosthesis 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 according to the prior Technology executed without plumbing. This is particularly advantageous if the shaft is made of metal 1 consists of the high-strength titanium alloy. Such solder-free connections that at the same time vacuum-tight and therefore bacteria-tight, between titanium and titanium alloys and the ceramics that come into question here, such as A1203 ceramics and hydroxyapatite ceramics on the other hand, belong to the state of the art.

Der Vorteil des erfindungsgemäßen Implantats zur Versorgung von Amputationsstümpfen im Vergleich zu der bisherigen Art der Stumpfversorgung besteht darin, daß die Krafteinleitung über Weichgewebeschichten und über die Haut vermieden wird. Es kann vielmehr eine direkte Lasteinleitung von der äußeren Prothese in den verbleibenden Knochenteil des Amputationsstumpfes erfolgen.The advantage of the implant according to the invention for the treatment of amputation stumps Compared to the previous type of stump restoration, the fact that the force is introduced over soft tissue layers and over the skin is avoided. Rather, it can be a direct load transfer from the external prosthesis to the remaining part of the bone of the amputation stump.

Die Belastung des Skelettes bzw. der verbliebenen Skeletteile kann daher weitgehend physiologisch erhalten bleiben.The load on the skeleton or the remaining parts of the skeleton can therefore largely retained physiologically.

Eine solche Art der Stumpfversorgung mit direkter, kraftschlüssiger Befestigung der äußeren Prothese am verbliebenen Skeletteil ist auch die Voraussetzung dafür, daß diese äußere Prothese Bewegungselemente enthalten kann, die durch aus der entsprechenden Extremität auszukoppelnde neurophysiologische Signale in anatomisch und funktionell angepaßter Weise gesteuert werden.Such a type of residual limb restoration with direct, force-fit Attachment of the external prosthesis to the remaining part of the skeleton is also a prerequisite for the fact that this outer prosthesis can contain movement elements which are made by Neurophysiological signals to be decoupled from the corresponding extremity in anatomical and controlled in a functionally adapted manner.

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Claims (7)

PATENTANSPRUCllE 1. Implantat zur Versorgung von Amputationsstümpfen bestehend aus einem Schaft 1 aus Metall, der über mindestens zwei Drittel seiner Länge vom proximalen Ende 2 aus gerechnet Verankerungselemente 4 aufweist, der im distalen Drittel auf seinem Umfang einen Keramikring 5 trägt und der am distalen Ende 3 die Möglichkeit 6 zum kraftschlüssigen Anschluß ein-es externen Prothesenteils bietet. PATENT CLAIMS 1. Implant for supplying amputation stumps consisting of a shaft 1 made of metal, which has at least two thirds of its Length from the proximal end 2 calculated from anchoring elements 4, which in the distal third carries a ceramic ring 5 on its circumference and the one on the distal At the end of 3 the possibility 6 for a force-fit connection of an external part of the prosthesis offers. 2. Implantat nach Anspruch 1, dadurch gekennzeichnet, daß die Verankerungselemente aus einem Gewinde, das von achsparallelen Längsnuten 7 durchsetzt ist, bestehen.2. Implant according to claim 1, characterized in that the anchoring elements consist of a thread through which axially parallel longitudinal grooves 7 pass. 3. Implantat nach Anspruch 1, dadurch gekennzeichnet, daß der Keramikring 5 auf seiner Außenseite eine Ringnut 8 aufweist.3. Implant according to claim 1, characterized in that the ceramic ring 5 has an annular groove 8 on its outside. 4. Implantat nach Anspruch 3, dadurch gekennzeichnet, daß der Durchmesser des Keramikringes 5 proximalseitig 9 der Ringnut8 kleiner ist als am distalen Ende 10 des Ringes.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 at the distal end 10 of the ring. 5. Implantat nach Anspruch 1, dadur-ch gekennzeichnet, daß der Keramikring 5 aus A1203 Keramik besteht.5. Implant according to claim 1, characterized in that the ceramic ring 5 consists of A1203 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 consists of calcium phosphate ceramic. 7. Implantat nach Anspruch 1, dadurch gekennzeichnet, daß die Möglichkeit zum kraftschlüssigen Anschluß aus einem Sackloch mit Innengewinde besteht.7. Implant according to claim 1, characterized in that the possibility for a non-positive 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 true DE3439993A1 (en) 1986-05-28
DE3439993C2 DE3439993C2 (en) 1986-12-04

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284545A1 (en) * 1987-02-26 1988-09-28 Mecron Medizinische Produkte Gmbh Stump cap
EP0477114A1 (en) * 1990-09-21 1992-03-25 Impact Orthopedic endoprosthesis for amputation stump
WO2001097718A1 (en) * 2000-06-23 2001-12-27 University College 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
WO2015157809A1 (en) * 2014-04-16 2015-10-22 Osseointegration Holdings Pty Ltd An osseointegrable device

Citations (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

Patent Citations (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

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Medizinalmarkt/Acta Medico-technica 23.Jahrg., Nr.8, 1975, S.243-246 *
Zeitschrift für Orthopädie 112 (1974) S.27-33 *

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0284545A1 (en) * 1987-02-26 1988-09-28 Mecron Medizinische Produkte Gmbh Stump cap
EP0477114A1 (en) * 1990-09-21 1992-03-25 Impact Orthopedic endoprosthesis for amputation stump
FR2666982A1 (en) * 1990-09-21 1992-03-27 Impact ORTHOPEDIC ENDOPROTHESIS OF MEMBER AMPUTATION LEFT.
US8137409B2 (en) 2000-06-23 2012-03-20 University College London Method of installing a transcutaneous prosthesis
US8628584B2 (en) 2000-06-23 2014-01-14 University College London Transcutaneous prosthesis
RU2288673C2 (en) * 2000-06-23 2006-12-10 Юниверсити Колледж Лондон Transcutaneous prosthesis
RU2406466C2 (en) * 2000-06-23 2010-12-20 Юниверсити Колледж Лондон Percutaneous prosthesis
US7014661B2 (en) 2000-06-23 2006-03-21 University College London Transcutaneous prosthesis
WO2001097718A1 (en) * 2000-06-23 2001-12-27 University College London Transcutaneous prosthesis
US9452066B2 (en) 2000-06-23 2016-09-27 University College 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
WO2015157809A1 (en) * 2014-04-16 2015-10-22 Osseointegration Holdings Pty Ltd An osseointegrable device
KR20170020747A (en) * 2014-04-16 2017-02-24 오쎄오인터그레이션 홀딩스 프로프라이어터리 리미티드 An osseointegrable device
US10456178B2 (en) 2014-04-16 2019-10-29 Osseointegration Holdings Pty Ltd Osseointegrable device
AU2015246643B2 (en) * 2014-04-16 2020-05-21 Osseointegration Holdings Pty Ltd An osseointegrable device
AU2015246643C1 (en) * 2014-04-16 2022-01-27 Osseointegration Holdings Pty Ltd An osseointegrable device
KR102412682B1 (en) 2014-04-16 2022-06-23 오쎄오인터그레이션 홀딩스 프로프라이어터리 리미티드 An osseointegrable device

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