ES2282738T3 - Endoprotesis de articulacion tibiotarsiana. - Google Patents
Endoprotesis de articulacion tibiotarsiana. Download PDFInfo
- Publication number
- ES2282738T3 ES2282738T3 ES03818773T ES03818773T ES2282738T3 ES 2282738 T3 ES2282738 T3 ES 2282738T3 ES 03818773 T ES03818773 T ES 03818773T ES 03818773 T ES03818773 T ES 03818773T ES 2282738 T3 ES2282738 T3 ES 2282738T3
- Authority
- ES
- Spain
- Prior art keywords
- component
- wedge
- sliding
- joint
- intermediate piece
- 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 - Lifetime
Links
Classifications
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- 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
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
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- 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
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- A—HUMAN NECESSITIES
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- 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
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- 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
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- 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
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- 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
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- A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
- A61F2002/30324—The prosthesis having different structural features at different locations within the same prosthesis differing in thickness
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- A—HUMAN NECESSITIES
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- 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
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Abstract
Endoprótesis para sustituir una articulación tibiotarsiana, que está constituida por un componente inferior (4) a unir con el astrágalo (2) y que forma una superficie de deslizamiento superior (10), un componente superior (3) que forma una superficie de deslizamiento inferior (7) y que presenta una superficie de unión superior (23) para establecer la unión con una superficie de resección (25) de la tibia, y una pieza intermedia que presenta dos superficies de deslizamiento (15, 16) cooperantes con las superficies de deslizamiento (7, 10) de los componentes superior e inferior (3, 4), siendo de forma de cuña el componente superior (3), en sección frontal y/o sagital, entre su superficie de deslizamiento inferior (7) y su superficie de unión superior (23) y/o siendo de forma de cuña la pieza intermedia (5), en sección sagital, entre su superficie de deslizamiento en el lado superior (15) y la orientación general de la superficie de deslizamiento en el lado inferior (16).
Description
Endoprótesis de articulación tibiotarsiana.
Para la sustitución de la articulación
tibiotarsiana se conoce una endoprótesis que está constituida por
un componente a unir con el astrágalo, un componente a unir con la
tibia y una pieza intermedia (documento
DE-U-88 12 806, folleto “LINK
S.T.A.R. Totale Sprunggelenkprothese [H. Kofoed] de la firma
Waldemar Link” (GmbH & Co.), Hamburgo). El componente del
astrágalo y la pieza intermedia cooperan a través de superficies de
deslizamiento que hacen posibles la flexión y extensión en el plano
sagital. El componente de la tibia y la pieza intermedia forman
superficies de deslizamiento cooperantes que permiten una rotación
alrededor del eje vertical. Pueden ser de construcción plana para
hacer posibles movimientos de compensación en la dirección AP y en
la dirección LM. La estabilización se realiza por medio del conjunto
de ligamentos naturales.
En la prótesis conocida las superficies de
deslizamiento superior e inferior de la pieza intermedia están
orientadas paralelamente una a otra en el plano frontal, ya que el
sustitutivo protésico de la articulación no deberá conducir a una
variación de la dirección. Sin embargo, se ha visto que no es raro
que los ligamentos laterales y mediales de la articulación
presenten después de la operación una tensión diferente, de lo que
pueden resultar molestias. Esto puede tener su fundamento en
irregularidades de la anatomía o en que el cirujano ha elegido una
orientación desfavorable de la superficie de resección prevista en
la tibia para la unión con la prótesis.
La invención se basa en el problema de evitar o
mitigar el desequilibrio entre, por un lado, las condiciones
anatómicas u operativas y, por otro lado, la prótesis.
La solución del problema según la invención
consiste en las características de la reivindicación 1 o en las de
la reivindicación 6. Según esto, se ha previsto que la pieza
intermedia y/o el componente de tibia estén configurados en forma
de cuña. Si el cirujano comprueba que, empleando una prótesis
normal, es diferente la tensión de los ligamentos, puede compensar
esto mediante el empleo de componentes de corrección que tengan una
forma de cuña en el plano frontal. El lado más grueso de la placa de
corrección de forma de cuña se dispone en el lado en el que,
empleando componentes normales, sería insuficiente la tensión de los
ligamentos. Cuando el cirujano reconoce que la superficie de
resección tibial no discurre perpendicularmente a la dirección de
la tibia o cuando desea por otros motivos que los planos de la
prótesis no discurran perpendicularmente al eje de la tibia, puede
utilizar también componentes de corrección cuya forma de cuña esté
situada en el plano sagital. Cuando le importe al cirujano que la
superficie de deslizamiento inferior del componente superior tenga
una orientación determinada con respecto a la dirección de la tibia
o a la dirección de la carga, éste empleará generalmente un
componente de tibia configurado como componente de corrección. Por
el contrario, cuando la orientación de la superficie de resección
tibial sea correcta e importe tener en cuenta la anatomía del pie,
el cirujano preferirá una pieza intermedia configurada como
componente de corrección.
Estado de la técnica conforme al artículo
54(3) CPE es la configuración en forma de cuña de la pieza
intermedia en el plano frontal según el objeto de la solicitud de
patente anterior PCT/EP02/02573 no publicada anteriormente.
La verificación de que el componente es de forma
de cuña no plantea dificultades en la práctica, ya que tanto su
superficie de unión superior como su superficie de deslizamiento
inferior son planas o sustancialmente planas. Para determinación de
una eventual forma de cuña de la pieza intermedia en el plano
sagital es decisiva la comparación con las piezas intermedias
normales. Por lo demás, se puede determinar fácilmente no sólo la
dirección de la superficie de deslizamiento superior aproximadamente
plana de la pieza intermedia, sino también la orientación general
de la superficie de deslizamiento inferior. Una pieza intermedia es
de forma de cuña en el plano sagital en el sentido de la presente
invención cuando, en comparación con la pieza intermedia normal, se
hace más gruesa en dirección anterior o posterior.
En el marco de la presente invención una forma
de cuña en el plano digital puede estar combinada con una forma de
cuña en el plano frontal. Sin embargo, la forma de cuña en el plano
sagital o en el plano frontal puede presentarse también sin forma de
cuña en el plano frontal o en el plano sagital.
El ángulo de cuña está comprendido
convenientemente entre 1º y 16º, preferiblemente entre 3º y 8º.
Para que la orientación de la forma de cuña de
la pieza intermedia no pueda ser alterada por rotación de la pieza
intermedia alrededor del eje vertical, se fija su orientación de
manera convenientemente forzosa desde el astrágalo o desde la tibia
haciendo que los pares de superficies de deslizamiento cooperantes
estén configurados correspondientemente de una manera determinante
de la dirección (por ejemplo en forma cilíndrica). A este fin, es
adecuada especialmente la articulación entre el astrágalo y la pieza
intermedia.
Para que el cirujano pueda elegir entre ángulos
de cuña diferentes, ha de tener a su disposición para cada prótesis
varios componentes de corrección diferentes. Para reducir el coste
ligado a esto, es conveniente configurar los componentes de
corrección en la forma más sencilla que sea posible. Por este
motivo, puede ser conveniente montarlos a partir de una pieza
estándar siempre igual y una pieza de cuña. La pieza estándar se
prevé en solamente una versión sencilla. Únicamente las piezas de
cuña necesitan estar presentes en variantes diferentes. Esto se
aplica especialmente cuando el componente superior se emplea como
componente de corrección y la pieza estándar forma los dispositivos
que son necesarios para la fijación a la tibia.
Se explica seguidamente la invención con más
detalle haciendo referencia al dibujo, que ilustra ejemplos de
realización ventajosos. Muestran:
La figura 1, una sección sagital a través de una
articulación provista de la prótesis,
La figura 2, la prótesis desplegada en
perspectiva,
La figura 3, una vista en perspectiva de la
disposición de los componentes de prótesis superior e inferior
implantados antes de la inserción de la pieza intermedia,
La figura 4, una sección frontal a través de un
componente de corrección superior,
La figura 5, una sección sagital a través de un
componente de corrección superior,
La figura 6, una sección sagital a través de una
pieza intermedia de corrección y
La figura 7, un componente de corrección
superior que está dividido en dos partes.
Entre la tibia 1 y el astrágalo 2 tiene que
disponerse la prótesis constituida por el componente superior 3, el
componente inferior 4 y la pieza intermedia 5. El componente
superior 3 presenta una parte 6 de forma de placa cuyo lado
inferior 7 forma una superficie de deslizamiento plana. Unos
salientes 8 sirven para la fijación en rebajos de resección
correspondientes 9 de la tibia 1.
El componente inferior 4 forma una superficie de
deslizamiento 10 abombada en forma convexa, la cual puede estar
configurada en forma cilíndrica o cónica. Lleva un nervio 11 que
está situado en la dirección del movimiento relativo de la pieza
intermedia cuando se realiza el movimiento de flexión y de
extensión. Asimismo, el componente inferior presenta facetas
laterales 12 destinadas a cooperar con superficies de deslizamiento
correspondientes de la tibia 1 y del peroné 13.
La pieza intermedia 5 posee un lado superior
plano 15 conjugado de la superficie de deslizamiento 7 y una
superficie de deslizamiento inferior 16 que está configurada en
forma complementaria de la superficie de deslizamiento 10 del
componente inferior 4. Esta contiene una ranura 17 destinada a
recibir el nervio 11. De este modo, la pieza intermedia 5 es guiada
lateralmente con relación al componente inferior 4. Solo le están
permitidos movimientos de flexión y de extensión.
Los componentes superior e inferior 3, 4 son
convenientemente de metal y la pieza intermedia 5 es de un plástico
que favorece el deslizamiento, tal como polietileno. Sin embargo, se
pueden emplear también otros materiales con resistencia y capacidad
de deslizamiento suficientes, por ejemplo cerámica.
Como consecuencia de la forma complementaria de
las superficies de deslizamiento 10 y 16, así como debido al nervio
11 en cooperación con la ranura 17, la pieza intermedia 5 no es
giratoria, referido al eje vertical, con respecto al componente 4
de la articulación tibiotarsiana. Por tanto, su orientación queda
fijada por la del componente inferior. Mientras que la forma de
realización mostrada excluye tales movimientos de rotación entre el
componente inferior y la pieza intermedia alrededor del eje
vertical, son imaginables también realizaciones en las que estos
movimientos están permitidos dentro de límites predeterminados o
bien están únicamente inhibidos o no están excluidos por la
configuración de la superficie de deslizamiento.
La explicación anterior con ayuda de las figuras
1 a 3 se aplican tanto a realizaciones con componentes normales como
a realizaciones con componentes de corrección.
En las figuras 4 a 6 se muestran ejemplos de
componentes de corrección. La figura 4 muestra una vista frontal de
un componente superior 3 configurado como componente de corrección.
Cerca del borde 20 que aparece a la izquierda en el dibujo, este
componente es más grueso que en el borde opuesto. El componente es
de construcción simétrica con respecto a su plano medio frontal, de
modo que el lado engrosado 20 deberá quedar situado, a elección del
cirujano, en el lado lateral o medial de la articulación.
La figura 5 muestra una sección sagital a través
del componente superior 3. Este es de construcción engrosada en
forma de cuña en el extremo 21 que aparece a la izquierda en el
dibujo. El lado superior de este componente es de construcción
simétrica con respecto al plano frontal. Por tanto, el extremo
engrosado puede estar dispuesto por delante o por detrás en la
articulación, a elección del cirujano. El ángulo de cuña 22 entre la
superficie de fijación superior 23 y la superficie de deslizamiento
inferior 7 está representado en ambos ejemplos dentro del orden de
magnitud de 5º.
La figura 6 muestra una sección sagital a través
de una pieza intermedia de corrección 5. Su lado inferior 16
configurado como superficie de deslizamiento tiene una orientación
general que discurre en dirección aproximadamente paralela a la
línea auxiliar 24 que se ha dibujado cerca de la superficie de
deslizamiento superior 15 para representar el ángulo de cuña 19. En
este caso, se ha supuesto que la línea 24 discurre en las piezas
intermedias normales paralelamente a la dirección general de la
superficie inferior 16. Decisiva para la verificación de una forma
de cuña de la pieza intermedia es siempre la comparación con los
componentes normales del sistema de prótesis.
No es necesario que una corrección se limite a
un solo componente respectivo. Por el contrario, pueden emplearse
componentes de corrección tanto como para el componente superior
como para la pieza intermedia. La figura 1 muestra esta
posibilidad.
Tan pronto como el cirujano ha implantado el
componente inferior 4, puede comprobar por medio de instrumentos
adecuados, mientras están tensados los ligamentos laterales, si la
superficie de resección 25 de la tibia tiene un recorrido normal
con respecto al componente inferior 4 o si es necesario una
corrección. En el último caso, el cirujano decide si deberá
elegirse un componente de corrección para el componente superior o
para la pieza intermedia o para ambos y lo gruesa que deberá ser la
respectiva forma de cuña y en qué dirección deberá extenderse ésta.
Sigue siendo posible también una medición correspondiente cuando
esté instalado el componente superior 3. Después de esto, se puede
decidir si se emplea como pieza intermedia un componente de
corrección.
La figura 7 ilustra el ensamble del componente
superior 3 a base de una pieza estándar 25 y una pieza de cuña 26.
Dado que la pieza estándar 25 forma los órganos de fijación 8, la
pieza de cuña 26, de la cual están disponibles varios ejemplares
con ángulos de cuña diferentes, puede estar configurada de una
manera correspondientemente más sencilla. Las dos piezas pueden
unirse una con otra de cualquier manera conocida. Por ejemplo,
pueden atornillarse una con otra. Pueden estar provistas también de
salientes y rebajos complementarios que encajan uno dentro de otro
y que permiten enchufar las dos piezas una en otra sin un coste
importante.
Claims (6)
1. Endoprótesis para sustituir una articulación
tibiotarsiana, que está constituida por un componente inferior (4)
a unir con el astrágalo (2) y que forma una superficie de
deslizamiento superior (10), un componente superior (3) que forma
una superficie de deslizamiento inferior (7) y que presenta una
superficie de unión superior (23) para establecer la unión con una
superficie de resección (25) de la tibia, y una pieza intermedia que
presenta dos superficies de deslizamiento (15, 16) cooperantes con
las superficies de deslizamiento (7, 10) de los componentes
superior e inferior (3, 4), siendo de forma de cuña el componente
superior (3), en sección frontal y/o sagital, entre su superficie
de deslizamiento inferior (7) y su superficie de unión superior (23)
y/o siendo de forma de cuña la pieza intermedia (5), en sección
sagital, entre su superficie de deslizamiento en el lado superior
(15) y la orientación general de la superficie de deslizamiento en
el lado inferior (16).
2. Endoprótesis según la reivindicación 1,
caracterizada porque las superficies de deslizamiento (10,
16) cooperantes en el componente inferior (4) y en la pieza
intermedia (5) cooperan de manera sustancialmente no rotativa con
respecto al eje vertical.
3. Endoprótesis según la reivindicación 1,
caracterizada porque las superficies de deslizamiento (7,
15) cooperantes en el componente superior (4) y en la pieza
intermedia (5) cooperan de manera rotativa con respecto al eje
vertical.
4. Endoprótesis según una de las
reivindicaciones 1 a 3, caracterizada porque el ángulo de
cuña (19, 22) está comprendido entre 1º y 16º.
5. Endoprótesis según una de las
reivindicaciones 1 a 4, caracterizada porque el componente
(3) de forma de cuña se compone de una parte de cuña (26) - que
está disponible con un ángulo de cuña diferente - y una pieza
estándar (25).
6. Sistema de endoprótesis para sustituir la
articulación tibiotarsiana que están constituidas por un componente
inferior (4) a unir con el astrágalo (2) y que forma una superficie
de deslizamiento superior (10), un componente superior (3) que
forma una superficie de deslizamiento inferior (7) y presenta una
superficie de unión (23) para establecer la unión con una
superficie de resección (25) de la tibia (1), y una pieza intermedia
(5) que presenta dos superficies de deslizamiento (15, 16)
cooperantes con las superficies de deslizamiento (7, 10) de los
componentes superior e inferior (3, 4), comprendiendo el sistema
componentes superiores y piezas intermedias normales, cuyos lados
superior e inferior tienen un recorrido general sustancialmente
paralelo, comprendiendo dicho sistema componentes de corrección que
pueden permutarse por los componentes superiores normales (3) y que
están configurados en forma de cuña, en el plano sagita y/o en el
plano frontal, entre sus lados superior e inferior (7, 23), y
comprendiendo también piezas intermedias de corrección que se pueden
permutar por las piezas intermedias normales (5) y que, en
comparación con las piezas intermedias normales (5), son de forma
de cuña, en el plano sagital, entre su superficie de deslizamiento
en el lado superior (15) y el recorrido general sobre la superficie
de deslizamiento en el lado inferior (16).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2003/009489 WO2005030098A1 (de) | 2003-08-27 | 2003-08-27 | Sprunggelenk-endoprothese |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2282738T3 true ES2282738T3 (es) | 2007-10-16 |
Family
ID=34384518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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ES03818773T Expired - Lifetime ES2282738T3 (es) | 2003-08-27 | 2003-08-27 | Endoprotesis de articulacion tibiotarsiana. |
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US (3) | US20070112431A1 (es) |
EP (1) | EP1658023B1 (es) |
JP (1) | JP4191194B2 (es) |
KR (1) | KR20100086066A (es) |
CN (1) | CN1819804B (es) |
AR (1) | AR045382A1 (es) |
AT (1) | ATE357195T1 (es) |
AU (1) | AU2003258674B2 (es) |
BR (1) | BR0318475A (es) |
DE (1) | DE50306880D1 (es) |
DK (1) | DK1658023T3 (es) |
ES (1) | ES2282738T3 (es) |
IL (1) | IL173388A0 (es) |
MX (1) | MXPA06002144A (es) |
WO (1) | WO2005030098A1 (es) |
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-
2003
- 2003-08-27 DE DE50306880T patent/DE50306880D1/de not_active Expired - Lifetime
- 2003-08-27 EP EP03818773A patent/EP1658023B1/de not_active Expired - Lifetime
- 2003-08-27 AU AU2003258674A patent/AU2003258674B2/en not_active Ceased
- 2003-08-27 MX MXPA06002144A patent/MXPA06002144A/es active IP Right Grant
- 2003-08-27 ES ES03818773T patent/ES2282738T3/es not_active Expired - Lifetime
- 2003-08-27 JP JP2005509133A patent/JP4191194B2/ja not_active Expired - Fee Related
- 2003-08-27 WO PCT/EP2003/009489 patent/WO2005030098A1/de active Application Filing
- 2003-08-27 DK DK03818773T patent/DK1658023T3/da active
- 2003-08-27 CN CN038269783A patent/CN1819804B/zh not_active Expired - Fee Related
- 2003-08-27 AT AT03818773T patent/ATE357195T1/de active
- 2003-08-27 KR KR1020107013845A patent/KR20100086066A/ko not_active Application Discontinuation
- 2003-08-27 BR BRPI0318475-7A patent/BR0318475A/pt not_active IP Right Cessation
- 2003-08-27 US US10/567,580 patent/US20070112431A1/en not_active Abandoned
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2004
- 2004-08-18 AR ARP040102961A patent/AR045382A1/es active IP Right Grant
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2006
- 2006-01-26 IL IL173388A patent/IL173388A0/en not_active IP Right Cessation
-
2010
- 2010-04-06 US US12/755,086 patent/US8591595B2/en not_active Expired - Lifetime
-
2013
- 2013-11-25 US US14/088,524 patent/US9681958B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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EP1658023A1 (de) | 2006-05-24 |
US20140081413A1 (en) | 2014-03-20 |
KR20100086066A (ko) | 2010-07-29 |
AU2003258674B2 (en) | 2009-12-10 |
AR045382A1 (es) | 2005-10-26 |
BR0318475A (pt) | 2006-09-12 |
US20100198355A1 (en) | 2010-08-05 |
JP2007534342A (ja) | 2007-11-29 |
CN1819804A (zh) | 2006-08-16 |
CN1819804B (zh) | 2010-10-06 |
AU2003258674A1 (en) | 2005-04-14 |
WO2005030098A1 (de) | 2005-04-07 |
EP1658023B1 (de) | 2007-03-21 |
US8591595B2 (en) | 2013-11-26 |
DE50306880D1 (de) | 2007-05-03 |
DK1658023T3 (da) | 2007-06-11 |
US9681958B2 (en) | 2017-06-20 |
US20070112431A1 (en) | 2007-05-17 |
ATE357195T1 (de) | 2007-04-15 |
AU2003258674A2 (en) | 2005-04-14 |
JP4191194B2 (ja) | 2008-12-03 |
IL173388A0 (en) | 2006-06-11 |
MXPA06002144A (es) | 2006-05-22 |
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