DE19731021A1 - In vivo abbaubares metallisches Implantat - Google Patents
In vivo abbaubares metallisches ImplantatInfo
- Publication number
- DE19731021A1 DE19731021A1 DE19731021A DE19731021A DE19731021A1 DE 19731021 A1 DE19731021 A1 DE 19731021A1 DE 19731021 A DE19731021 A DE 19731021A DE 19731021 A DE19731021 A DE 19731021A DE 19731021 A1 DE19731021 A1 DE 19731021A1
- Authority
- DE
- Germany
- Prior art keywords
- sayings
- medical implant
- implant according
- iron
- metals
- 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.)
- Withdrawn
Links
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- 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
-
- 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
- A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
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Description
Die vorliegende Erfindung betrifft Implantate aus metalli
schen Werkstoffen zum Einsatz in dem menschlichen oder tieri
schen Körper.
Derartige Implantate sind grundsätzlich seit langem bekannt.
Die ersten Implantate wurden zu orthopädischen Zwecken ent
wickelt, beispielsweise Schrauben und Nägel zum Fixieren von
Knochenbrüchen. Diese bestanden zunächst aus relativ einfa
chen Eisenlegierungen, die unter in vivo-Bedingungen zu Kor
rosion neigten. Die Korrosion führte dazu, daß in unmittelba
rer Nähe des Knochens Metalle als Ionen freigesetzt wurden,
die einen unerwünschten Anreiz für das Wachstum des Knochen
gewebes gegeben haben. Der Knochen ist stärker gewachsen, als
es eigentlich erwünscht und erforderlich ist. Hierdurch wurde
das gesunde Knochenmaterial geschädigt.
Aus diesem Grund ist man bestrebt, metallische Implantate
grundsätzlich aus möglichst korrosionsbeständigen Materialien
zu fertigen. Hier sind derzeit hauptsächlich korrosionsbe
ständige Edelstähle, Tantal und Titan im Gebrauch. Diese Im
plantate bleiben nach der Implantierung als Fremdkörper prä
sent und werden als solche vom Organismus erkannt. Sie sind
nur durch eine zweite Operation zu entfernen.
Außerdem sind metallische Implantate im Bereich der Gefäß
chirurgie und der Kardiologie, Angiologie und Radiologie be
kannt. Diese Implantate umfassen zum Beispiel endoluminale
und Gefäßstützen (Stents) zur Behandlung von Läsionen. Diese
Stützen dienen z. B. zur Aufweitung und Lumenerhaltung von
verengten Gefäßen, indem sie vom Gefäßlumen ausgehend mit ei
nem Ballonkatheter (balloon expandable) oder selbstexpandie
rend (self expanding) das Gefäßlumen auf einem entsprechend
optimalen Innendurchmesser halten. Das Implantat ist an sich
nur so lange erforderlich, bis das erkrankte Gefäß durch bio
logische Reparaturvorgänge aus eigener Kraft den erforderli
chen Durchmesser dauerhaft halten kann. Dies ist im allgemei
nen etwa 4 Wochen nach Implantation der Fall.
Der dauerhafte Verbleib eines metallischen Implantats ist je
doch mit einigen Nachteilen verbunden. Das Implantat führt
als Fremdkörper zu lokalen und eventuell auch systemischen
Reaktionen. Zusätzlich wird die Selbstregulation des betrof
fenen Gefäßsegments behindert. Die ständige (pulsatile) Bela
stung des Metalls kann zu Ermüdungsbrüchen führen, was bei
großlumigen Implantaten (z. B. Verschlußsystemen wie Schirm
chen) zu neuen medizinischen Problemen führen kann. Ge
fäßstützen in kleineren Lumina (2,5-6 mm) erzeugen in etwa
20% eine erneute Stenosierung (sogenannte In-Stent-Stenose),
was bei der hohen Zahl der Implantate kumulativ zu einer zu
sätzlichen medizinischen und ökonomischen Belastung führt. In
einigen Gefäßregionen (z. B. extrakranielle Gefäße, Beinarte
rien) kann die metallische Struktur durch Krafteinwirkung von
außen dauerhaft verformt werden mit den Folgen einer erneuten
Gefäßobstruktion bzw. eines induzierten Gefäßverschlusses.
Jedes Dauerimplantat ist zusätzlich mit Problemen insbesonde
re für jüngere Patienten deshalb verbunden, weil ein Verblei
ben für Jahrzehnte unausweichlich ist.
Vollkommen biologisch abbaubare Implantate sind bislang nur
aus Kunststoffmaterialien bekannt, beispielsweise aus der DE 25 02 884 C2.
Dort wird eine Beschichtung eines orthopädischen
Implantats mit Polymethylmethacrylat offenbart, das biode
gradabel ist. Andere Kunststoffmaterialien umfassen Polylac
tid- und Polyglycolsäureester. Außerdem ist aus der EP 0006544 B1
ein biodegradables Keramikmaterial auf Basis von
Calciumphosphat bekannt, das ebenfalls zur Beschichtung von
metallischen Implantaten dient.
Schließlich ist aus der WO 81/02668 ein orthopädisches Im
plantat bekannt, das einen korrosionsbeständigen metallischen
Grundkörper sowie eine biologisch abbaubare, metallische Zwi
schenschicht für den Kontaktbereich zum Knochen ausweist.
Diese Zwischenschicht bildet zusammen mit dem Grundkörper ei
ne elektrochemische Zelle und erzeugt eine elektrische Span
nung, die das Knochenwachstum fördert. Gleichzeitig wird die
Oberflächenschicht, die beispielsweise aus Silberlegierungen
bestehen kann, abgebaut. Dies führt zu dem angestrebten Ef
fekt, daß das Knochenwachstum so lange positiv beeinflußt
wird, wie es erforderlich ist und dann nach vollständigem Ab
bau der Oberflächenbeschichtung der elektrische Reiz nach
läßt.
Bisher bekannte biodegradable Substanzen auf Polymerbasis
werden in der Gefäßchirurgie verwendet. Ihre mechanischen Ei
genschaften einerseits und die nachfolgende Fremdkörperreak
tion während der Biodegradation andererseits führen dazu, daß
sie als alleiniges Material für eine Implantation ungeeignet
sind. Metallische Werkstoffe/Legierungen besitzen günstige
mechanische Eigenschaften (Elastizität, Verformbarkeit, Sta
bilität) bei geringerer Masse, was für die Applikation durch
dünnlumige Führungssysteme bei transkutanem Vorgehen eine
wichtige Voraussetzung darstellt.
Es ist daher Aufgabe der vorliegenden Erfindung, Implantate
aus biodegradablem Material zur Verfügung zu stellen, die zu
gleich vorteilhafte mechanische Eigenschaften aufweisen.
Diese Aufgabe wird durch Implantate mit den Merkmalen des An
spruchs 1 gelöst.
Weil das medizinische Implantat aus einem metallischen Werk
stoff gefertigt ist, der durch Korrosion in vivo abbaubar
ist, liegen primär die mechanischen Vorteile metallischer
Werkstoffe vor. Der korrosive Abbau des Implantats innerhalb
einer durch Materialwahl einstellbaren Zeitskala verhindert
andererseits, daß die negativen Langzeiteffekte des metalli
schen Fremdkörpers eintreten. Dabei ist es biologisch vor
teilhaft, wenn der Werkstoff eine Legierung oder ein Sinter
metall ist, deren Hauptbestandteil aus der Gruppe der Alkali
metalle, der Erdalkalimetalle, Eisen, Zink oder Aluminium
ausgewählt ist. Derzeit wird als Hauptbestandteil Magnesium
oder Eisen bevorzugt.
Die biologischen, mechanischen und chemischen Eigenschaften
der Werkstoffe sind positiv beeinflußbar, wenn als Nebenbe
standteil Magnesium, Kobalt, Nickel, Chrom, Kupfer, Cadmium,
Blei, Zinn, Thorium, Zirkonium, Silber, Gold, Palladium, Pla
tin, Silicium, Calcium, Lithium, Aluminium, Zink oder Eisen
vorgesehen ist. Als Material wird insgesamt derzeit entweder
eine Legierung aus Magnesium mit einem Anteil von bis zu 40%
Lithium sowie Eisen-Zusatz oder eine Eisenlegierung mit einem
geringen Anteil an Aluminium, Magnesium, Nickel und/oder Zink
bevorzugt.
Das medizinische Implantat wird in mehreren Grundvarianten
ausgeführt. Für eine Gefäßstütze ist als Grundkörper ein
rohrförmiger Aufbau mit zusätzlicher Bearbeitung vorgesehen.
Als Verschlußsystem (z. B. Ductus Botalli, angeborene und er
worbene Septumdefekte, arterio-venöse Shuntverbindungen) sind
passiv und/oder aktiv entfaltbare Schirmformen, Spiralen oder
komplexe Körper vorteilhaft. Die Erfindung ist auch anwendbar
bei Okkludern als Verschlußsysteme für Hohlraumverbindungen,
Gefäße oder Gangsysteme.
Es ist außerdem vorteilhaft, das Implantat als Befestigungs-
oder Stützvorrichtung für die temporäre Fixierung von Gewebe
teilen in Form von Implantaten oder Transplantaten vorzuse
hen.
Zur Einstellung der Korrosionsgeschwindigkeit des Werkstoffs
ist von Vorteil, wenn die Materialstärke des Werkstoffs in
Abhängigkeit von der Zusammensetzung des Werkstoffs so ge
wählt ist, daß der Abbau- oder Korrosionsvorgang in vivo zwi
schen 5 Tagen und 6 Monaten, insbesondere zwischen 2 Wochen
und 8 Wochen, im wesentlichen abgeschlossen ist.
Hierbei wird erreicht, daß nach einem Anwachsen des Gewebeim
plantats die dann nicht mehr benötigte Fixiervorrichtung ver
schwindet.
Schließlich ist von Vorteil, wenn das Implantat als orthopä
disches Implantat, als Implantat für die Zahnmedizin, für die
Chirurgie im Oberbauch oder für die Unfallchirurgie insbeson
dere für die Behandlung des menschlichen Körpers ausgeführt
ist, wobei die Legierung so zu wählen ist, daß das Knochen
wachstum nicht negativ oder übermäßig beeinflußt wird. Erfin
dungsgemäße orthopädische Implantate in Form von Nägeln,
Schrauben oder Platten können so gestaltet werden, daß sie
nach Ausheilen des behandelten Knochenbruchs abgebaut werden
und nicht in einer zweiten Operation entfernt werden müssen.
Im folgenden werden verschiedene Ausführungsbeispiele der
vorliegenden Erfindung gegeben.
Ein erfindungsgemäßer Stent wird aus einem rohrförmigen
Grundkörper des metallischen und nachfolgender Bearbeitung
gefertigt. Vom mechanischen Aufbau her sind derartige
Stents beispielsweise aus der EP 0221570 B1 bekannt, wobei
das Material jedoch ein korrosionsbeständiger Edelstahl
ist.
Bei dem erfindungsgemäßen Stent nach diesem Beispiel ist
das Material entweder eine Legierung mit dem Hauptbestand
teil Magnesium und gegebenenfalls den Nebenbestandteilen
Lithium, Eisen, Zink und Spuren von Nickel, oder eine Le
gierung mit dem Hauptbestandteil Eisen und den Nebenbe
standteilen Chrom und Nickel sowie gegebenenfalls Spuren
von anderen Zuschlägen. Die prozentuale Zusammensetzung der
Magnesiumlegierung soll etwa im Bereich von 50-98% Magne
sium, 0-40% Lithium, 0-5% Eisen und unter 5% andere Me
talle liegen, die der Eisenlegierung etwa im Bereich 88-99%
Eisen, 0,5-7% Chrom und 0,5-3,5% Nickel sowie und
unter 5% andere Metalle. Die Wandstärke der Stentstreben
soll nach der Bearbeitung zwischen 50 und 100 µm betragen.
In der Praxis wird der erfindungsgemäße Stent in an sich
bekannter Weise mit einem Ballonkatheter in ein krankhaft
verengtes Blutgefäß eingesetzt und dort dilatiert oder als
selbstexpandierender Stent freigesetzt, wobei er das Blut
gefäß auf dem gewünschten Durchmesser hält. Eine ohne
Stent-Implantation verbleibende Restenose (Recoil) und/oder
ein durch die Dilatation induzierter Geweberiß werden wir
kungsvoll behandelt. Innerhalb von 2-4 Wochen wird der
Stent von Intimagewebe überdeckt und behält seine Stütz
funktion zunächst bei. Das Blutgefäß erhält durch Gewebe
wachstum infolge von Eigenreparaturvorgängen im Bereich des
Implantierten Stents eine neue Eigenstabilität. Das Gefäß
lumen wird auf einem optimalen Niveau stabilisiert. Die
Wahl des Legierungsmaterials zusammen mit der gewählten
Wandstärke führen andererseits dazu, daß der Stent in der
Wandung des Blutgefäßes allmählich abgebaut wird und nach
etwa 4-12 Wochen nur noch in Spuren vorliegt. Die auf
Seite 2 geschilderten Nachteile eines Dauerimplantats gehen
verloren.
Ein erfindungsgemäßes Verschlußsystem (Schirmchen) wird aus
einem metallischen Skelett, an dem ein Kunststoffschirmchen
befestigt ist, gefertigt. Derartige Schirmchen sind bekannt
beispielsweise aus der Legierung MP35N oder Nitinol. Derar
tige Verschlußsysteme werden zum Verschluß von Defekten in
den Herzscheidewänden verwendet. Die Wandstärke des metal
lischen Gerüstes beträgt um 500 µm. In der Praxis wird das
Schirmchen in an sich bekannter Weise zusammengefaltet und
in dem zu verschließenden Defekt freigesetzt. Innerhalb von
3-4 Wochen wird das Schirmchen vom körpereigenen Gewebe
bedeckt und erhält durch dieses Gewebewachstum eine neue
Eigenstabilität. Die Wahl des Legierungsmaterials zusammen
mit der Gewebewandstärke führt dazu, daß das metallische
Gerüst innerhalb von 4 Wochen bis einigen Monaten abgebaut
wird und nach einem Jahr nur noch in Spuren vorliegt. Der
Kunststoffanteil des Schirmchens bleibt erhalten, was auf
grund der Flexibilität des Materials unkritisch ist. Der
Abbau des metallischen Anteils hat gegenüber den bekannten
Schirmchen den Vorteil, daß auch bei unvorhergesehenen Be
lastungen z. B. bei Verkehrsunfällen keine Gefahr des Durch
stoßens von Gefäßwandungen mehr besteht.
Eine erfindungsgemäße Spirale (Coil) wird aus einem in He
lixform gewickelten metallischen Material gefertigt und die
Spirale vorgebogen. Der Durchmesser der Primärwicklung be
trägt 0,1-1 mm, je nach dem zu verschließenden Gefäß.
Derartige Spiralen (Coils) sind bekannt, beispielsweise aus
Nitinol, Platinlegierungen oder Wolframlegierungen.
Bei der vorliegenden erfindungsgemäßen Ausführungsform ist
das Material eine Legierung mit dem Hauptbestandteil Eisen,
den Nebenbestandteilen Nickel und/oder Chrom sowie Spuren
von Magnesium und Zink.
In der Praxis wird die Verschlußspirale (Coil) in an sich
bekannter Weise in gestrecktem Zustand in einen Herzkathe
ter eingeführt und durch diesen bis zu dem zu verschließen
den Gefäß vorgeschoben. Bei der Freisetzung aus dem Herzka
theter nimmt die Spirale wieder ihre alte Form an und
verschließt durch ihr Lumen und ihre Thrombogenität, die
durch Dacron oder andere Fasern erhöht werden kann, das zu
verschließende Gefäß. Nach Thrombosierung des Gefäßes und
Einwachsen von Bindegewebe erhält der Verschlußmechanismus
eine neue Eigenstabilität. Die applizierte Spirale wird
allmählich abgebaut, so daß nach etwa einem Jahr das im
plantierte Material nur noch in Spuren vorliegt.
Die insoweit genannten Ausführungsbeispiele lassen sich so
wohl mit Magnesiumlegierungen als auch mit Eisenlegierungen
fertigen. Toxische Wirkungen der Materialien bei den zu er
wartenden Konzentrationen sind nicht bekannt.
Magnesiumlegierungen haben den Vorteil, daß durch geeignete
Wahl der übrigen Legierungsbeständteile die in vivo zu erwar
tende Abbaugeschwindigkeit sehr genau gewählt werden kann.
Außerdem ist Magnesium physiologisch sehr gut verträglich.
Eisenlegierungen sind vorteilhaft hinsichtlich der mechani
schen Stabilität, was sich in den möglichen geringen Wand
stärken der Implantate ausdrückt. Das Legierungsmaterial kann
deshalb je nach Anwendungsfall ausgewählt werden.
Claims (16)
1. Medizinisches Implantat, aus einem metallischen Werk
stoff, dadurch gekennzeichnet,
daß der Werkstoff durch Korrosion in vivo abbaubar ist.
2. Medizinisches Implantat nach Anspruch 1, dadurch
gekennzeichnet, daß der Werkstoff eine Le
gierung ist, deren Hauptbestandteil aus der Gruppe ausge
wählt ist, die folgendes umfaßt: Alkalimetalle, Erdalka
limetalle, Eisen, Zink, Aluminium.
3. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß der Werkstoff als Hauptbestandteil Magnesium, Eisen
oder Zink enthält.
4. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß der Werkstoff als Nebenbestandteil ein oder mehrere
Elemente aus der Gruppe enthält, die folgendes umfaßt:
Mn, Co, Ni, Cr, Cu, Cd, Pb, Sn, Th, Zr, Ag, Au, Pd, Pt, Si, Ca, Li, Al, Zn, Fe.
Mn, Co, Ni, Cr, Cu, Cd, Pb, Sn, Th, Zr, Ag, Au, Pd, Pt, Si, Ca, Li, Al, Zn, Fe.
5. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß der Werkstoff 50-98% Magnesium, 0-40% Lithium, 0-5%
Eisen und unter 5% andere Metalle enthält.
6. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß der Werkstoff 55-65% Magnesium, 30-40% Lithium
und 0-5% andere Metalle enthält.
7. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß der Werkstoff 88-99% Eisen, 0,1-4% Chrom und 0,1-3,5%
Nickel sowie unter 5% andere Metalle enthält.
8. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß der Werkstoff 90-96% Eisen, 3-6% Chrom und 1-3%
Nickel sowie 0-5% andere Metalle enthält.
9. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß das Implantat eine Gefäßstütze ist.
10. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß das Implantat einen im wesentlichen rohrförmigen
Grundkörper aufweist.
11. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß das Implantat eine Spirale (Coil), ein Schirm, ein
Stent oder ein Pfropfen ist.
12. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß die Materialstärke des Werkstoffs in Abhängigkeit von
der Zusammensetzung des Werkstoffs so gewählt ist, daß
der Abbau- oder Korrosionsvorgang in vivo im Bereich von
5 Tagen bis zu 6 Monaten, insbesondere zwischen 2 Wochen
und 8 Wochen im wesentlichen abgeschlossen ist.
13. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß, das Implantat eine endoluminale Stützfunktion in
Hohlorganen und/oder Gangsystemen (z. b. Harnleiter, Gal
lengänge, Harnröhre, Uterus, Bronchien) aufweist.
14. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß das Implantat ein Okkluder als Verschlußsystem für
Hohlraumverbindungen, Gefäße oder Gangsysteme ist.
15. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß das Implantat eine Befestigungs- oder Stützvorrich
tung für die temporäre Fixierung von Gewebeimplantaten
oder -transplantaten ist.
16. Medizinisches Implantat nach einem der vorhergehenden An
sprüche, dadurch gekennzeichnet,
daß das Implantat ein orthopädisches Implantat, bei
spielsweise eine Schraube, ein Nagel, eine Platte oder
ein Teil eines Gelenks ist.
Priority Applications (23)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19731021A DE19731021A1 (de) | 1997-07-18 | 1997-07-18 | In vivo abbaubares metallisches Implantat |
| ES98943732T ES2200368T3 (es) | 1997-07-18 | 1998-07-17 | Implante metalico degradable en vivo. |
| EP98943732A EP0923389B1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubares metallisches implantat |
| JP50644199A JP5352776B2 (ja) | 1997-07-18 | 1998-07-17 | 生体内で分解可能な金属のインプラント |
| US09/269,084 US7879367B2 (en) | 1997-07-18 | 1998-07-17 | Metallic implant which is degradable in vivo |
| DK02019905T DK1270023T3 (da) | 1997-07-18 | 1998-07-17 | Metallisk implantat, som er nedbrydeligt in vivo |
| PCT/EP1998/004415 WO1999003515A2 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubares metallisches implantat |
| IL12906598A IL129065A0 (en) | 1997-07-18 | 1998-07-17 | Metallic implant which is degradable in vivo |
| AU91541/98A AU9154198A (en) | 1997-07-18 | 1998-07-17 | Metallic implant which is degradable in vivo |
| PT02019905T PT1270023E (pt) | 1997-07-18 | 1998-07-17 | Implante metalico degradavel in vivo |
| DE59812873T DE59812873D1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubare metallische Gefä stütze |
| AT02019905T ATE297767T1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubare metallische gefä stütze |
| AT98943732T ATE236667T1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubares metallisches implantat |
| ES02019905T ES2243635T3 (es) | 1997-07-18 | 1998-07-17 | Soporte metalico de vasos degradable "in vivo". |
| EP05005740.5A EP1552856B1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubares metallisches Implantat |
| EP02019905A EP1270023B2 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubare metallische Gefäßstütze |
| DE59807846T DE59807846D1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubares metallisches implantat |
| IL129065A IL129065A (en) | 1997-07-18 | 1999-03-18 | Metallicvascular support which is degradable in vivo |
| IL172424A IL172424A (en) | 1997-07-18 | 2005-12-07 | Metallic vascular support which is degradable in vivo |
| JP2009208920A JP2009297537A (ja) | 1997-07-18 | 2009-09-10 | 生体内で分解可能な金属のインプラント |
| US12/897,967 US20110251669A1 (en) | 1997-07-18 | 2010-10-05 | Metallic implant which is degradable in vivo |
| JP2010249076A JP2011031063A (ja) | 1997-07-18 | 2010-11-05 | 生体内で分解可能な金属のインプラント |
| US13/211,921 US8771751B2 (en) | 1997-07-18 | 2011-08-17 | Metallic implant which is degradable in vivo |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19731021A DE19731021A1 (de) | 1997-07-18 | 1997-07-18 | In vivo abbaubares metallisches Implantat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19731021A1 true DE19731021A1 (de) | 1999-01-21 |
Family
ID=7836229
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19731021A Withdrawn DE19731021A1 (de) | 1997-07-18 | 1997-07-18 | In vivo abbaubares metallisches Implantat |
| DE59812873T Expired - Lifetime DE59812873D1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubare metallische Gefä stütze |
| DE59807846T Expired - Lifetime DE59807846D1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubares metallisches implantat |
Family Applications After (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE59812873T Expired - Lifetime DE59812873D1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubare metallische Gefä stütze |
| DE59807846T Expired - Lifetime DE59807846D1 (de) | 1997-07-18 | 1998-07-17 | In vivo abbaubares metallisches implantat |
Country Status (11)
| Country | Link |
|---|---|
| US (3) | US7879367B2 (de) |
| EP (3) | EP0923389B1 (de) |
| JP (3) | JP5352776B2 (de) |
| AT (2) | ATE297767T1 (de) |
| AU (1) | AU9154198A (de) |
| DE (3) | DE19731021A1 (de) |
| DK (1) | DK1270023T3 (de) |
| ES (2) | ES2243635T3 (de) |
| IL (3) | IL129065A0 (de) |
| PT (1) | PT1270023E (de) |
| WO (1) | WO1999003515A2 (de) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP0923389A2 (de) | 1999-06-23 |
| ES2200368T3 (es) | 2004-03-01 |
| JP5352776B2 (ja) | 2013-11-27 |
| EP1270023B1 (de) | 2005-06-15 |
| ATE297767T1 (de) | 2005-07-15 |
| EP1270023B2 (de) | 2012-04-11 |
| IL129065A (en) | 2006-04-10 |
| JP2011031063A (ja) | 2011-02-17 |
| EP1270023A2 (de) | 2003-01-02 |
| JP2009297537A (ja) | 2009-12-24 |
| US20110251669A1 (en) | 2011-10-13 |
| US8771751B2 (en) | 2014-07-08 |
| EP1270023A3 (de) | 2003-12-17 |
| IL172424A (en) | 2008-08-07 |
| DE59812873D1 (de) | 2005-07-21 |
| JP2001511049A (ja) | 2001-08-07 |
| WO1999003515A3 (de) | 1999-08-05 |
| EP1552856B1 (de) | 2015-10-07 |
| EP0923389B1 (de) | 2003-04-09 |
| ES2243635T3 (es) | 2005-12-01 |
| US20110301694A1 (en) | 2011-12-08 |
| IL129065A0 (en) | 2000-02-17 |
| DE59807846D1 (de) | 2003-05-15 |
| WO1999003515A2 (de) | 1999-01-28 |
| EP0923389A3 (de) | 2002-08-28 |
| ATE236667T1 (de) | 2003-04-15 |
| US7879367B2 (en) | 2011-02-01 |
| PT1270023E (pt) | 2005-10-31 |
| EP1552856A1 (de) | 2005-07-13 |
| AU9154198A (en) | 1999-02-10 |
| US20020004060A1 (en) | 2002-01-10 |
| DK1270023T3 (da) | 2005-09-05 |
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