DE8602133U1 - Implant for filling the medullary canal of long bones - Google Patents
Implant for filling the medullary canal of long bonesInfo
- Publication number
- DE8602133U1 DE8602133U1 DE19868602133 DE8602133U DE8602133U1 DE 8602133 U1 DE8602133 U1 DE 8602133U1 DE 19868602133 DE19868602133 DE 19868602133 DE 8602133 U DE8602133 U DE 8602133U DE 8602133 U1 DE8602133 U1 DE 8602133U1
- Authority
- DE
- Germany
- Prior art keywords
- implant
- bone
- medullary canal
- tubular part
- filling
- 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
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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS 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
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/04—Macromolecular materials
- A61L31/06—Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7283—Intramedullary pins, nails or other devices with special cross-section of the nail
-
- 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
- A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
- A61F2002/3006—Properties of materials and coating materials
- A61F2002/30062—(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
-
- 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
- A61F2002/30224—Three-dimensional shapes cylindrical
- A61F2002/30235—Three-dimensional shapes cylindrical tubular, e.g. sleeves
-
- 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
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/30784—Plurality of holes
-
- 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
- A61F2210/00—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2210/0004—Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof bioabsorbable
-
- 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
- A61F2230/0069—Three-dimensional shapes cylindrical
Description
Dr. Lutz ClaesDr. Lutz Claes
Sommerweg 5Sommerweg 5
7910 Neu-Ulm/Pfuhl7910 Neu-Ulm / Pfuhl
Prof. Dr. Caius Burri
Rotleitenweg 8
8878 KissendorfProf. Dr. Caius Burri
Rotleitenweg 8
8878 Kissendorf
j 7900 Ulm, 14.01.86j 7900 Ulm, January 14th, 1986
Akte G/6772 d/thFile G / 6772 d / th
AA.
II.
Implantat zur Ausfüllung des Markraumes von Röfitren-Implant for filling the medullary canal of Röfitren-
'f 'f knochen.bone.
Die Erfindung betrifft ein Implantat zur Ausfüllung des Markraumes von Röhrenknochen im Bereich eines Knochendefektes,The invention relates to an implant for filling the medullary canal of long bones in the area of a Bone defect,
Bei der Behandlung von großen Knochendefekten ist es regelmäßig erforderlich, den Defekt mit vorzugsweise körpereigenen Knochentransplantaten, die beispielsweise aus dem Beckenbereich stammen können, oder Knochenersatzstoffen zu füllen, um so die Möglichkeit einer überbrückung des Defektes durch körpereigenes Gewebe zu schaffen.When treating large bone defects it is necessary to treat the defect with preferably on a regular basis endogenous bone grafts, which can come from the pelvic area, for example, or To fill bone substitutes in order to have the possibility of bridging the defect with the body's own Creating tissue.
Handelt es sich dabei um einen Deirkt an einem RöhIs it a deirk on a Röh?
renknochen, so wird im allgemeinen zunächst das anrenkbochen, this is generally the case at first
III I « » * · > IIII I «» * ·> I
Il I I · · t · I I IIl I I · t · I I I
— 2 —- 2 -
den Defekt der Knochenrohrwand angrenzende Markraumvolumen und anschließend der Bereich des Defektes selbst mit dem Knochentransplantat oder dem Knochenersatzmaterial aufgefüllt, da das Transplantatmaterial allein im Bereichder Kortikaliswandung keinen mechanischen Halt findet. Vielmehr würde das Transplantatmaterial in den Markraum einbrechen, wodurch die überbrückung des Defektes durch körpereigenes Gewebe erschwert bzw. ausgeschlossen wäre.The medullary canal volume adjacent to the defect of the bone tube wall and then the area of the defect itself filled with the bone graft or the bone substitute material as the graft material there is no mechanical hold in the area of the cortical wall alone. Rather, it would be the graft material break into the medullary canal, bridging the defect by the body's own Tissue would be difficult or excluded.
Nachteilig ist hierbei zunächst der verhältnismäßig hohe Bedarf an Transplantatmaterial zur Auffüllung des Markraumvolumens, wobei im übrigen gerade das im Markraumvolumen befindliche Transplantatmaterial im Verlauf des Heilungsvorgangs durch den Organismus zur Rekanalisierung wieder resorbiert werden muß, um damit die Röhrenform des Knochens wieder herzustellen. The first disadvantage here is the relatively high requirement for graft material for filling of the medullary canal volume, with the rest of the graft material located in the medullary canal volume must be reabsorbed by the organism for recanalization in the course of the healing process in order to to restore the tubular shape of the bone.
Der Erfindung liegt die Aufgabe zugrunde, ein Implantat der eingangs genannten Art zu schaffen, durch das der Bedarf an Transplantatmaterial oder Knochenersatzstoffen erheblich verringert-und die Wiederherstellung der Röhrenform des Knochens wesentlich erleichtert wird, wobei zugleich eine den Heilungsprozeß fördernde guie Durchblutung des Transplantatbzw. Knochenersatzmaterials vom ^arkraum. her ermöglicht wird.The invention is based on the object of creating an implant of the type mentioned at the outset, through which the need for graft material or bone substitute material is significantly reduced - and the restoration the tubular shape of the bone is significantly facilitated, while at the same time the healing process promoting good blood flow to the transplant or. Bone substitute material from the ark room. is made possible.
β » * t β » * t
Ein diese Aufgabe lösendes Implantat ist gekennzeichnet durch ein rohrförmiges Teil, dessen äußere Mantelfläche dem näherungsweise zylindrischen Hohlbzw. Markraum des Röhrenknochens angepaßt und mit über den Umfang verteilt angeordneten Durchbrüchen versehen ist.An implant solving this problem is characterized by a tubular part, the outer Outer surface of the approximately cylindrical Hohlbzw. Medullary cavity of the long bone adapted and with is provided distributed over the circumference arranged breakthroughs.
Der durch die Erfindung erreichte Fortschritt besteht im wesentlichen darin, daß das Implantat den Knochendefekt zum Markraum hin begrenzt, wodurch zur Auffüllung des Knochendefektes nur eine wesentlich geringere Menge an Transplantatmaterial bzw. Knochenersatzstoff benötigt wird. Durch die rohrförmige Ausbildung des Implantats wird der Markraum im übrigen frei gehalten, so daß es während des Heilungsvorgangs keiner Resorption des Implantatmaterials zur Rekanalisierung und somit der Wiederherstellung der Röhrenform des Knochens bedarf. Zugleich bleibt die Durchblutung des Markraumes erhalten, so daß über die Durchbrüche im rohrförmigen Teil des Implantats auch für eine gute Durchblutung des Transplantatmaterials bzw. des Knochenersatzstoffes gesorgt ist.The progress achieved by the invention consists essentially in the fact that the implant delimits the bone defect towards the medullary canal, thereby filling it up of the bone defect only a significantly smaller amount of graft material or bone substitute is needed. Due to the tubular design of the implant, the medullary canal is otherwise kept free so that there is no resorption of the implant material for recanalization during the healing process and thus requires the restoration of the tubular shape of the bone. At the same time, the blood circulation remains of the medullary canal, so that through the openings in the tubular part of the implant as well a good blood flow to the transplant material or the bone substitute is ensured.
Je nach dem sich im Einzelfall ergebenden Anwendungsbereich kann das rohrförmige Teil in bevorzugter Ausführungsform der Erfindung eine zylindrische, polygone oder ovale äußere Umfangsfläche besitzen.Depending on the area of application arising in the individual case, the tubular part can in a preferred embodiment of the invention have a cylindrical, polygonal or oval outer peripheral surface.
Das Implantat kann unter bestimmten medizinischen Indikationen, insbes. auch bei geforderter hoher Festig-The implant can be used under certain medical indications, especially when high strength
jiJt -*.n s··,»!.*» νjiJt - *. n s ··, »!. *» ν
keit, aus einem resistenten, körperverträglichen Material, wie beispielsweise einem geeigneten Stahl bestehen. In der Regel wird das rohrförnrge Teil des Implantats jedoch von einem resorbierbaren biokompatiblen Implantatmaterial wie etwa Polylactad gebildet cein.made of a resistant, biocompatible material such as a suitable steel exist. Usually the pipe shape is part of the However, the implant is formed from a resorbable, biocompatible implant material such as polylactad no.
Um das Implantat der Längsausdehnung des Knochendefektes in einfacher Weise und schnell anpassen zu können, empfiehlt es sich, daß das rohrförmige Teil mit einer oder mehreren, sich längs seines Umfanges erstreckenden Sollbruchstellen versehen ist.In order to adapt the implant to the longitudinal extent of the bone defect in a simple and quick manner can, it is recommended that the tubular part with one or more, extend along its circumference extending predetermined breaking points is provided.
Im folgenden wird die Erfindung an einem in der Zeichnung dargestellten Ausführungsbeispiel näher erläutert; die einzige Figur zeigt ein Implantat nach der Erfindung im Längsschnitt, das in einen einen Knochenfekt aufweisenden Röhrenknochen eingesetzt ist.In the following the invention is explained in more detail using an embodiment shown in the drawing; the single figure shows an implant according to the invention in longitudinal section, which is inserted into a bone defect having tubular bones is used.
Im einzelnen besteht das Implantat aus einem rohrförmigen Teil 1, dessen äußere Mantelfläche 2 dem näherungsweise zylindrischen Hohl- bzw. Markkraum 3 des Röhrenknochens 4 angepaßt ist. Das Implantat erstreckt sich dabei in seiner Längsrichtung mit seinen beiden Enden 1.1, 1.2 über den Bereich eines durch die Linie 5 angedeuteten Knochendefektes hinaus, wodurch seine Mantelfläche 2 den Knochendefekt 5 zum Markraum 3 hin begrenzt. Durch das Implantat wird das zur Auffüllung des Knochendefektes 5 benötigte Transplantatmaterial 6 bzw. der Knochener-In detail, the implant consists of a tubular part 1, the outer jacket surface 2 of which is approximately the same cylindrical cavity or medullary space 3 of the long bone 4 is adapted. The implant extends in its longitudinal direction with its two ends 1.1, 1.2 over the area of a by the line 5 indicated bone defect addition, whereby its outer surface 2 the bone defect 5 bounded towards the medullary canal 3. The implant is what is required to fill the bone defect 5 Graft material 6 or the bone
···*■■■··· * ■■■
ft**« * 6ft ** «* 6
eatzstoff, die eine Überbrückung des Defektes 5 durch körpereigenes Gewebe ermöglichen, wesentlich verringert. Um nämlich dem die Kortikaliswandung auffüllenden Material 6 einen hinreichenden mechanischen Halt zu gewährleisten, müßte das gesamte, etwa zwischen den gestrichelt angedeuteten Linien 7 liegende Volumen des Markraums 3 mit Transplantatmaterial 6 aufgefüllt werden. Um die ursprüngliche Röhrenform des Knochens wieder herzustellen, hätte der Körper dann im Verlauf des Heilungsvorgangs die im Markraum 3 liegenden Knochenersatzmaterialien 6 wieder zu resorbieren und so eine Rekanalisierung vorzunehmen. Zur Förderung des Heilungsvorganges ist das rohrförmige Teil 1 ferner lit über den Umfang verteilt angeordneten Durchbrüchen 8 versehen, die z. B. zylindrisch ausgebildet sein können und eine gute Durchblutung des Transplantatmaterials vom Markraum her erlauben.food that bridges the defect 5 made possible by the body's own tissue, significantly reduced. Namely around the cortical wall filling material 6 to ensure a sufficient mechanical hold, the whole would have to, for example Volume of the medullary canal 3 with transplant material lying between the lines 7 indicated by dashed lines 6 are filled. In order to restore the original tubular shape of the bone, it would have to be the body then in the course of the healing process the bone substitute materials lying in the medullary canal 3 6 to reabsorb again and thus to carry out a recanalization. To promote the healing process the tubular part 1 is also provided with perforations 8 distributed over the circumference, the z. B. can be cylindrical and a good blood flow to the graft material allow from the medullary canal.
Das rohrförmige Teil 1 kann je nach Anwendungsfall aus einem der für Implantate gebräuchlichen Materialien bestehen. Vorzugsweise wird es jedoch, da es sich in der Regel nicht ohne erneute Beschädigung des Röhrenknochens 4 wieder entfernen läßt, von einem resorbierbaren biokompatiblen Implantatmaterial vie etwa Polylactad gebildet sein.The tubular part 1 can depending on the application consist of one of the materials commonly used for implants. Preferably, however, as it will can usually not be removed again without renewed damage to the long bone 4, from a resorbable, biocompatible implant material such as polylactad.
Schließlich kann das rohrförmige Teil 1 mit einer oder mehreren, in der Zeichnung im einzelnen nicht näher dargestellten Sollbruchstellen versehen sein,Finally, the tubular part 1 with one or more, not in the drawing in detail specified breaking points must be provided,
die sich längs seines Umfangs erstrecken und ein einfaches Ablängen des rohrförmigen Teils 1 auf die benötigte Länge ermöglichen.which extend along its circumference and a simple cutting to length of the tubular part 1 allow the required length.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19868602133 DE8602133U1 (en) | 1986-01-29 | 1986-01-29 | Implant for filling the medullary canal of long bones |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19868602133 DE8602133U1 (en) | 1986-01-29 | 1986-01-29 | Implant for filling the medullary canal of long bones |
Publications (1)
Publication Number | Publication Date |
---|---|
DE8602133U1 true DE8602133U1 (en) | 1986-03-13 |
Family
ID=6791013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19868602133 Expired DE8602133U1 (en) | 1986-01-29 | 1986-01-29 | Implant for filling the medullary canal of long bones |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE8602133U1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988001519A1 (en) * | 1986-08-26 | 1988-03-10 | Royal Postgraduate Medical School | Implantable bone drain |
FR2612392A1 (en) * | 1987-03-19 | 1988-09-23 | Audion Michel | Interrupted biodegradable composites of variable strength |
DE3919900A1 (en) * | 1989-06-19 | 1990-12-20 | Aesculap Ag | Repair of fractured bone - using bar of material which is inserted into medullary canal and absorbed into bone |
EP0741551A1 (en) * | 1994-01-28 | 1996-11-13 | American Medical Electronics, Inc. | Cranio-maxillofacial bone defect repair |
-
1986
- 1986-01-29 DE DE19868602133 patent/DE8602133U1/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988001519A1 (en) * | 1986-08-26 | 1988-03-10 | Royal Postgraduate Medical School | Implantable bone drain |
US5163924A (en) * | 1986-08-26 | 1992-11-17 | Michael Beverly | Implantable bone drain |
FR2612392A1 (en) * | 1987-03-19 | 1988-09-23 | Audion Michel | Interrupted biodegradable composites of variable strength |
DE3919900A1 (en) * | 1989-06-19 | 1990-12-20 | Aesculap Ag | Repair of fractured bone - using bar of material which is inserted into medullary canal and absorbed into bone |
EP0741551A1 (en) * | 1994-01-28 | 1996-11-13 | American Medical Electronics, Inc. | Cranio-maxillofacial bone defect repair |
EP0741551A4 (en) * | 1994-01-28 | 1998-01-07 | American Med Electronics | Cranio-maxillofacial bone defect repair |
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