ES2233886T3 - Kit para realizar un implante de refuerzo. - Google Patents

Kit para realizar un implante de refuerzo.

Info

Publication number
ES2233886T3
ES2233886T3 ES03005974T ES03005974T ES2233886T3 ES 2233886 T3 ES2233886 T3 ES 2233886T3 ES 03005974 T ES03005974 T ES 03005974T ES 03005974 T ES03005974 T ES 03005974T ES 2233886 T3 ES2233886 T3 ES 2233886T3
Authority
ES
Spain
Prior art keywords
kit according
cone
kit
dimensional
plug
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
Application number
ES03005974T
Other languages
English (en)
Inventor
Hans Dr. Grundei
P.-M. Prof. Dr. Karpf
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.)
Eska Implants GmbH and Co KG
Original Assignee
Eska Implants GmbH and Co KG
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 Eska Implants GmbH and Co KG filed Critical Eska Implants GmbH and Co KG
Application granted granted Critical
Publication of ES2233886T3 publication Critical patent/ES2233886T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • 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
    • A61F2/30907—Nets or sleeves applied to surface of prostheses or in cement
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4607—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of hip femoral endoprostheses
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30143—Convex polygonal shapes hexagonal
    • 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
    • A61F2002/30205—Three-dimensional shapes conical
    • A61F2002/3021—Three-dimensional shapes conical frustoconical
    • A—HUMAN NECESSITIES
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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
    • 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
    • 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
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30495—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking ring
    • 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
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30507—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a threaded locking member, e.g. a locking screw or a set screw
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • 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
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A61F2002/30616—Sets comprising a plurality of prosthetic parts of different sizes or orientations
    • 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
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    • A61F2002/30621—Features concerning the anatomical functioning or articulation of the prosthetic joint
    • A61F2002/30649—Ball-and-socket joints
    • A61F2002/3065—Details of the ball-shaped head
    • A61F2002/30652—Special cut-outs, e.g. flat or grooved cut-outs
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
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    • A61F2002/30673—Lubricating means, e.g. synovial pocket
    • 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
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
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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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    • A61F2/02—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
    • 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
    • A61F2/02—Prostheses implantable into the body
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    • A61F2002/30807—Plurality of blind bores
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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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  • Health & Medical Sciences (AREA)
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  • Transplantation (AREA)
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  • General Health & Medical Sciences (AREA)
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  • Prostheses (AREA)
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Abstract

Kit para realizar un implante de refuerzo para la cabeza articular restante de una articulación coxofemoral, compuesto por al menos una caperuza (1) que imita la forma de la cabeza articular, con un cono enchufable (2) moldeado que sobresale de la zona de polo (P) hacia el lado cóncavo abierto, caracterizado por una ayuda de fijación (3) circunferencial en el interior de la caperuza (1), para la fijación estable del implante a largo plazo sobre la cabeza articular restante.

Description

Kit para realizar un implante de refuerzo.
La presente invención se refiere a un kit para realizar un implante de refuerzo para la esfera articular de una articulación coxofemoral. El documento DE-C-923383 constituye el estado más cercano de la técnica.
En el caso de daños en la zona de la articulación coxofemoral se intenta dejar la máxima cantidad posible de material óseo natural. Por ello, en el caso de daños relativamente pequeños, por ejemplo, una necrosis de la cabeza de la articulación coxofemoral, parece inapropiado crear mediante resecciones de grandes zonas una sustitución de la esfera articular reseccionada entonces. Para ello, habitualmente, se usan las llamadas endoprótesis de mango largo. Por lo tanto, en este tipo de daños que sí perjudican al paciente, se están usando cada vez más las llamadas endoprótesis de cuello femoral en las que el mango de la prótesis se encuentra solamente en la metáfisis y la diáfisis. El uso de un implante de este tipo, tal como se conoce por ejemplo por el documento EP-A-0878176, permite, en caso de complicaciones después de llevarla durante mucho tiempo, cambiar a la endoprótesis de mango largo conocida ya mencionada. En el caso de la implantación de la endoprótesis del cuello femoral, de antemano se realiza una menor resección del cuello femoral que en el caso de la implantación de una endoprótesis de mango largo. Si fuera necesario un cambio, ahora el resto del cuello femoral se puede reseccionar en la medida en la que se hace de antemano al implantar una endoprótesis de mango largo, por lo que el cuidado endoprotético de las endoprótesis puede prolongarse en un ciclo.
Los daños como una necrosis de cabeza no siempre justifican ni siquiera un procedimiento tan cauteloso.
Ante estos antecedentes, la invención tiene el objetivo de configurar un kit denominado al principio de tal forma que la resección durante la implantación pueda reducirse a un mínimo, pero evitando a la vez los daños de la cabeza.
Este objetivo se consigue mediante el kit con los componentes mínimos según la reivindicación 1. Otras variantes ventajosas se indican en las reivindicaciones subordinadas.
Como componentes mínimos del kit está prevista una caperuza que imita la esfera articular natural presentando un cono enchufable que sobresale de la zona de polo hacia su lado cóncavo abierto. Además, está prevista una ayuda de fijación circunferencial en el interior de la caperuza.
La caperuza según la invención se coloca sobre la cabeza restante que queda después de la preparación de la cabeza esférica articular natural. Para ello, después de fresar la cabeza articular natural, en su zona de polo se introduce un taladro en el que se puede colocar el cono enchufable. En una forma de realización representada más adelante, está insertada en dicho taladro una espiga que se encuentra en un asiento de apriete con el cono enchufable.
La ayuda de fijación circunferencial en el interior de la caperuza asegura un asiento seguro de la caperuza sobre la cabeza restante.
Según una forma de realización, la ayuda de fijación está configurada como ranura circunferencial con un fondo tridimensional, estructurado, de mallas abiertas. Dicha estructura sirve para que las trabéculas óseas del material óseo circundante pueda penetrar en la estructura para asegurar así una fijación estable a largo plazo.
Como alternativa, existe otra forma de realización, según la que la ayuda de fijación es un anillo de apriete que se puede insertar en una ranura circunferencial en la caperuza.
Para aumentar aún más la seguridad del asiento de la caperuza sobre la cabeza restante, según una variante ventajosa, el anillo de apriete según esta última forma de realización presenta al menos parcialmente una estructura reticular espacial tridimensional, de mallas abiertas, en su superficie. Alrededor de dicha estructura reticular espacial y penetrando en la misma puede crecer a su vez el material óseo circundante, obteniendo una alta estabilidad a largo plazo.
Para potenciarlo aún más, según otra forma de realización ventajosa está previsto que la cámara anular que rodea el fondo del cono enchufable esté cubierto por una estructura reticular espacial, tridimensional, de mallas abiertas. Al interior y a través de la misma crecen trapéculas óseas asegurando el asiento de la caperuza sobre la cabeza restante.
Según una variante ventajosa, el kit comprende adicionalmente una espiga que ya se ha mencionado anteriormente y que se puede poner en un asiento de apriete cónico junto con el cono enchufable, a través de un casquillo de apriete cónico. En este caso, la espiga se inserta en el taladro en la zona de polo de la esfera articular natural. Preferentemente, la superficie de la espiga está provista al menos parcialmente de una estructura reticular espacial, tridimensional, de mallas abiertas. También al interior y a través de ésta crecen trabéculas óseas que aseguran un asiento seguro del implante a largo plazo.
En algunos caso, durante la operación pueden producirse complicaciones que obligan al cirujano a iniciar la retirada. Si ya se ha establecido la unión entre la caperuza y la espiga, en casos aislados resulta difícil volver a retirar la caperuza de la espiga. Por ello, una forma de realización especial prevé prever en el interior del cono enchufable un taladro roscado con el que se pueda enroscar un tornillo de extracción que pueda accionarse a través de un orificio en la zona de polo de la caperuza. Por lo tanto, en caso de necesidad de retirada, el cirujano introduce una herramienta adecuada por el orificio en la zona de polo de la caperuza accionando el tornillo hasta haberlo girado hasta el final del taladro roscado en el cono y hasta que al seguir enroscándolo se produzca la retirada de la caperuza de la espiga.
Para la mejor fijación de la espiga en la cabeza articular restante, puede estar previsto que la superficie de la espiga esté provista al menos parcialmente de una estructura reticular espacial, tridimensional, de mallas abiertas. A su interior y a través de la misma crecen trabéculas óseas garantizando de una manera acreditada una fijación a largo plazo del implante en el hueso.
El kit según la invención resulta especialmente ventajoso si comprende caperuzas de varios tamaños, así como espigas de varios tamaños. Entonces, el cirujano puede elegir los tamaños adecuados durante la operación y completar el implante in situ.
A continuación, la invención se describe detalladamente con la ayuda de las figuras del dibujo. Muestran:
la figura 1 una vista de un corte a través del implante de refuerzo, realizado a partir de un primer kit,
la figura 2 la vista de un corte de la caperuza según otro ejemplo de realización,
la figura 3 la vista de un corte a través de espigas de diferentes tamaños,
la figura 4 la vista en planta desde arriba sobre un anillo de apriete del kit, y
la figura 5 la vista sobre la caperuza del kit.
A continuación, las referencias iguales designan piezas iguales.
La figura 1 muestra un implante de refuerzo que se realizó a partir de un primer kit de la invención. La pieza central del implante de refuerzo es la caperuza 1 que se compone de un material apropiado como metal o cerámica o de un material compuesto. En su superficie están realizadas concavidades 12 distribuidas uniformemente, que no están comunicadas entre sí. Las concavidades sirven para recibir el líquido articular (líquido sinovial). Las concavidades 12 en combinación con el líquido sinovial provocan una distribución de la presión en el acetábulo pelviano (no representado) que conduce al deslizamiento de la esfera articular en el acetábulo.
La caperuza 1 presenta en su interior un cono enchufable 2 moldeado en una zona de polo P. Sobre el cono enchufable 2 está colocado un casquillo de apriete 11 cónico insertado en la espiga 13. El casquillo de apriete 11 cónico se encuentra sobre el cono enchufable 2 en un asiento de apriete cónico. La espiga 13 está provista, al menos por zonas, con una estructura reticular espacial 14 tridimensional, de mallas abiertas, a cuyo interior y a través de la cual crecen las trabéculas óseas del material óseo circundante aumentando la fijación segura del implante sobre la cabeza articular restante.
En el interior de la caperuza 1 está dispuesta la ayuda de fijación 3 circunferencial. En esta forma de realización, ésta está constituida por una ranura circunferencial, cuyo fondo está cubierto con una estructura reticular espacial 17 tridimensional, de mallas abiertas. También a esta estructura crece el
material óseo para la fijación del implante.
Se puede ver que el cono enchufable 2 limita una cámara anular 6 que rodea el cono enchufable 2. El fondo 5 de la cámara anular 6 está ocupado en el presente caso con una estructura reticular espacial 7 tridimensional, de mallas abiertas, con la que se pueden unir por crecimiento trabéculas óseas contribuyendo a una fijación estable a largo plazo.
En el interior del cono enchufable 2 está previsto un taladro roscado 8. En dicho taladro roscado 8 está insertado un tornillo de extracción 9. Por un orificio 10 de la caperuza, realizado en la zona de polo P, el cirujano puede llevar una herramienta adecuada (no representada) a la zona de aplicación de herramientas 15 del tornillo 9, estando configurada la zona de aplicación de herramientas 15, preferentemente, como hexágono interior. Cuando el tornillo de extracción 9 alcanza el final del cono enchufable 2 y el cirujano sigue enroscando el tornillo 9, esto hace que el cono enchufable 12 se levante del casquillo de apriete 11 cónico en la espiga 13.
La figura 2 representa otro ejemplo de realización de la caperuza 1. A diferencia de la forma de realización representada en la figura 1, la ayuda de fijación circunferencial está realizada por una ranura 3' circunferencial, incorporada. En dicha ranura 3' se puede insertar un anillo de apriete 3'' (figura 4). El anillo de apriete 3' presenta, orientada hacia dentro, una estructura reticular espacial 4 tridimensional, de mallas abiertas, con la que pueden unirse a su vez por crecimiento las trabéculas óseas.
La figura 3 representa diferentes tamaños de la espiga 13. En el presente caso, en el fondo del casquillo enchufable 11 está insertado además un taladro roscado 16. El taladro roscado 16 sirve para alojar, después de retirar la caperuza 1, en caso de ser necesario retirar también la espiga 13 de la cabeza articular restante, una herramienta de retirada con la que la espiga pueda retirarse de la zona fresada en la cabeza articular restante.
La figura 5 representa otra vez la distribución de las concavidades 12 por la superficie de la caperuza 1.

Claims (9)

1. Kit para realizar un implante de refuerzo para la cabeza articular restante de una articulación coxofemoral, compuesto por al menos una caperuza (1) que imita la forma de la cabeza articular, con un cono enchufable (2) moldeado que sobresale de la zona de polo (P) hacia el lado cóncavo abierto, caracterizado por una ayuda de fijación (3) circunferencial en el interior de la caperuza (1), para la fijación estable del implante a largo plazo sobre la cabeza articular restante.
2. Kit según la reivindicación 1, en el que la ayuda de fijación (3) es una ranura circunferencial con un fondo tridimensional de mallas abiertas.
3. Kit según la reivindicación 1, en el que la ayuda de fijación (3) es un anillo de apriete (3'') que se puede insertar en una ranura (3') circunferencial.
4. Kit según la reivindicación 3, en el que el anillo de apriete (3) presenta al menos parcialmente una estructura reticular espacial, tridimensional, de mallas abiertas, en su superficie.
5. Kit según una de las reivindicaciones 1 a 4, en el que la cámara anular (6) que rodea el fondo (5) del cono enchufable (2) está cubierto con una estructura reticular espacial (7) tridimensional, de mallas abiertas.
6. Kit según una de las reivindicaciones 1 a 5, adicionalmente con una espiga (13) que se pueden poner en un asiento de apriete cónico con el cono enchufable (2), mediante un casquillo de apriete (11) cónico.
7. Kit según una de las reivindicaciones 1 a 6, en el que en el interior del cono enchufable (2) está previsto un taladro roscado (8) con el que está enroscado un tornillo de extracción (9) que se puede accionar a través de un orificio (10) en la zona del polo (P) de la caperuza (1).
8. Kit según la reivindicación 6, en el que la superficie de la espiga (13) está provista, al menos parcialmente, con una estructura reticular espacial (14) tridimensional, de mallas abiertas.
9. Kit según la reivindicación 6 u 8, que comprende caperuzas (1) de varios tamaños, así como espigas (13) de varios tamaños.
ES03005974T 2002-04-23 2003-03-18 Kit para realizar un implante de refuerzo. Expired - Lifetime ES2233886T3 (es)

Applications Claiming Priority (2)

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DE10218801A DE10218801B3 (de) 2002-04-23 2002-04-23 Set zur Erstellung eines Armierungsimplantates
DE10218801 2002-04-23

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DE10261813B4 (de) 2002-12-19 2004-10-28 Eska Implants Gmbh & Co. Zentrierhilfe für ein Gelenkkopf-Kappenimplantat eines künstlichen Hüftgelenkes
DE10301986B4 (de) * 2003-01-15 2005-05-25 Eska Implants Gmbh & Co. Set zur Erstellung eines Gelenkkopf-Kappenimplantates für ein künstliches Hüftgelenk
DE202004012594U1 (de) * 2004-08-09 2004-10-14 Eska Implants Gmbh & Co. Set zur Erstellung eines Gelenkkopf-Kappenimplantates für ein künstliches Hüftgelenk
DE102004051431B3 (de) * 2004-10-19 2006-06-01 Eska Implants Gmbh & Co. Meta-diaphysäre Endoprothese für ein künstliches Hüftgelenk
DE102005006023B3 (de) * 2005-02-08 2006-08-03 Eska Implants Gmbh & Co. Gelenkkopf-Kappenimplantat für ein künstliches Hüftgelenk
US8425614B2 (en) * 2006-03-20 2013-04-23 Biomet Manufacturing Corp. Modular center pegged glenoid
GB0609402D0 (en) * 2006-05-12 2006-06-21 Finsbury Dev Ltd Prosthesis
DE102007032583B3 (de) 2007-07-09 2008-09-18 Eska Implants Gmbh & Co.Kg Set zur Erstellung eines Offset-Resurfacing-Hüftgelenksimplantates
DE102007041794B3 (de) * 2007-08-30 2009-04-30 Eska Implants Gmbh & Co.Kg Set zur Erstellung eines Offset-Resurfacing-Gelenkkopf-Kappenimplantates für ein künstliches Hüftgelenk
GB0724019D0 (en) 2007-12-08 2008-01-16 Depuy Int Ltd Implant assembly
FR2926212B1 (fr) * 2008-01-16 2010-03-05 Evolutis Implant prothetique d'articulation entre deux os comprenant une embase de fixation recevant une tete hemispherique

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FR59919E (fr) * 1949-11-17 1954-09-21 Nouvelle forme de prothèse ostéo-articulaire
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US2685877A (en) * 1952-03-20 1954-08-10 Dobelle Martin Femoral head prosthesis
GB764600A (en) * 1954-04-28 1956-12-28 Pryor & Howard Ltd An appliance for use as a femoral prosthesis
DE3306171C2 (de) * 1982-05-28 1984-07-12 Gebrüder Sulzer AG, Winterthur Kugelkopf für eine Hüftgelenkendoprothese
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DE10130366A1 (de) * 2001-05-18 2002-11-21 Peter Copf Zementfreie Hüftgelenksendoprothese als Oberflächenersatz des proximalen Femurs

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EP1356795A1 (de) 2003-10-29
ATE284659T1 (de) 2005-01-15
DE10218801B3 (de) 2004-01-15
EP1356795B1 (de) 2004-12-15
DE50300198D1 (de) 2005-01-20

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