DE19919083C1 - Implantable acetabulum, particularly for hip joint prostheses - Google Patents

Implantable acetabulum, particularly for hip joint prostheses

Info

Publication number
DE19919083C1
DE19919083C1 DE1999119083 DE19919083A DE19919083C1 DE 19919083 C1 DE19919083 C1 DE 19919083C1 DE 1999119083 DE1999119083 DE 1999119083 DE 19919083 A DE19919083 A DE 19919083A DE 19919083 C1 DE19919083 C1 DE 19919083C1
Authority
DE
Grant status
Grant
Patent type
Prior art keywords
shell
insert
adapter
cone
self
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 - Fee Related
Application number
DE1999119083
Other languages
German (de)
Inventor
Martin Imhof
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.)
INTRAPLANT AG CHAM
Original Assignee
INTRAPLANT AG CHAM
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
Grant date

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/30721Accessories
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/32Joints for the hip
    • A61F2/34Acetabular cups
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108Shapes
    • A61F2002/3011Cross-sections or two-dimensional shapes
    • A61F2002/30112Rounded shapes, e.g. with rounded corners
    • A61F2002/30131Rounded shapes, e.g. with rounded corners horseshoe- or crescent- or C-shaped or U-shaped
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
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    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108Shapes
    • A61F2002/30199Three-dimensional shapes
    • A61F2002/30205Three-dimensional shapes conical
    • A61F2002/3021Three-dimensional shapes conical frustoconical
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    • A61F2002/30217Three-dimensional shapes conical hollow cones, e.g. tubular-like cones
    • A61F2002/30219Three-dimensional shapes conical hollow cones, e.g. tubular-like cones the inner and outer surfaces having different conicities
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    • A61F2/00Filters 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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    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331Connections 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
    • A61F2002/30332Conically- or frustoconically-shaped protrusion and recess
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    • A61F2/00Filters 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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    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30474Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using an intermediate sleeve interposed between both prosthetic parts to be coupled
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    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30487Circumferential cooperating grooves and beads on cooperating lateral surfaces of a mainly longitudinal connection
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30329Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/305Snap connection
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    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
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    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316The 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
    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30594Special structural features of bone or joint prostheses not otherwise provided for slotted
    • A61F2002/30598Plurality of slots
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    • A61F2/02Prostheses implantable into the body
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    • A61F2002/30535Special structural features of bone or joint prostheses not otherwise provided for
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    • A61F2/34Acetabular cups
    • A61F2002/3453Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped
    • A61F2002/3462Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped having a frustoconical external shape, e.g. entirely frustoconical
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637Special 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
    • A61F2002/4641Special 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 for disconnecting
    • AHUMAN NECESSITIES
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    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4681Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor by applying mechanical shocks, e.g. by hammering
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, E.G. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004Rounded shapes, e.g. with rounded corners
    • A61F2230/0013Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0063Three-dimensional shapes
    • A61F2230/0067Three-dimensional shapes conical
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2250/00Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0058Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/006Additional features; Implant or prostheses properties not otherwise provided for modular
    • A61F2250/0062Kits of prosthetic parts to be assembled in various combinations for forming different prostheses
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00011Metals or alloys
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00011Metals or alloys
    • A61F2310/00023Titanium or titanium-based alloys, e.g. Ti-Ni alloys
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2310/00Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005The prosthesis being constructed from a particular material
    • A61F2310/00179Ceramics or ceramic-like structures

Abstract

Es wird eine implantierbare Gelenkpfanne, insbesondere für Hüftgelenkendoprothesen beschrieben, die eine im Knochen zu verankernde Schale (10) und einen in dieser Schale (10) gehaltenen Einsatz (20.1, 20.2) zur Lagerung des Gelenkkopfes aufweist. It is an implantable joint socket, described in particular for hip joint prostheses, the insert held in a bone to be anchored shell (10) and in this shell (10) (20.1, 20.2) for storage of the joint head. Um wahlweise Einsätze (20.1, 20.2) aus verschiedenen Materialien mittels einer selbsthemmenden Konusverbindung in der Schale (10) zu befestigen, ist ein Adapter (28) vorgesehen, der in die Innenkonusfläche (14) der Schale (10) eingesetzt werden kann, um den Kegelwinkel für die selbsthemmende Konusverbindung zu, verkleinern. To selectively inserts (20.1, 20.2) for securing of different materials by means of a self-locking cone connection in the shell (10), an adapter (28) is provided which can be inserted into the inner cone surface (14) of the shell (10) to the cone angle for self-locking taper connection to downsize.

Description

Die Erfindung betrifft eine implantierbare Gelenkpfanne, ins besondere für Hüftgelenkendoprothesen, gemäß dem Oberbegriff des Anspruchs 1. The invention relates to an implantable acetabular cup, in particular for hip joint prostheses, according to the preamble of claim 1.

Gelenkendoprothesen, insbesondere Hüftgelenkendoprothesen bestehen aus einer Gelenkpfanne, die einen Gelenkkopf aufnimmt und gleitfähig lagert. Joint prostheses, in particular hip joint prostheses consist of a joint socket which accommodates a joint head and slidably superimposed. Bei der Hüftgelenkendoprothese wird die Gelenkpfanne in Beckenknochen verankert, während der Gelenk kopf mittels eines Schaftes im Femur verankert wird. In the hip joint, the joint socket is anchored in the pelvic bone, while the head is articulated by means of a shaft anchored in the femur. Die Ge lenkpfanne besteht häufig aus einer Schale, die in dem Knochen verankert wird und einem in der Schale gehaltenen Einsatz, der den Gelenkkopf aufnimmt und die Gleitfläche für den Gelenkkopf bildet. The Ge joint socket often consists of a shell that is anchored in the bone and a held in the roof panel, which accommodates the joint head, and forms the sliding surface for the joint head. Dies hat den Vorteil, dass die Schale in Bezug auf Material und Gestaltung zur Verankerung im Knochen optimiert werden kann, während das Material des Einsatzes im Hinblick auf eine optimale Gleitpaarung mit dem Gelenkkopf und eine maximale Lebensdauer gewählt werden kann. This has the advantage that the shell in terms of material and design for anchoring in the bone can be optimized while the material of the insert can be selected with a view to optimal sliding combination with the joint head and a maximum service life. Außerdem kann bei Wechseloperationen der Einsatz aus der Schale entfernt und ersetzt werden. In addition, in exchange operations, the insert can be removed from the shell and replaced.

Es ist bekannt, den Einsatz mittels einer selbsthemmenden Konusverbindung in der Schale zu halten. It is known to hold the insert by means of a self-locking cone connection in the shell. Hierzu weist die Schale eine Innenkonusfläche auf, in welche der Einsatz mit einer äußeren Konusfläche eingeschlagen wird, so dass sich der selbsthemmende Halt des Einsatzes in der Schale ergibt. To this end the shell has an inner cone surface, in which the insert is wrapped with an outer conical surface, so that the self-locking support of the insert results in the shell. Soll bei einer Wechseloperation der Einsatz aus der Schale entfernt werden, wird dieser gegen die Selbsthemmung aus der Schale herausgeschlagen. Is to be removed at a changing operation of the insert from the shell, it is ejected against the self-locking of the shell.

Die Schale wird in der Regel im Hinblick auf die mechanischen Eigenschaften aus Metall gefertigt. The shell is usually made with a view to the mechanical properties of metal. Für den Einsatz werden vorwiegend Metall, Keramik oder Kunststoff (Polyethylen) ver wendet. Metal, ceramic or plastic (polyethylene) ver are primarily aimed for use. Besteht die Schale aus Metall ergibt sich ein unter schiedlicher Selbsthemmungswinkel für die Konusverbindung, je nachdem welches dieser Materialien für den Einsatz verwendet wird. The shell consists of metal results in an under schiedlicher self-locking angle for the taper connection, depending on which of these materials is used for the insert. Beispielsweise ergibt sich für die Paarung Metall-Kera mik ein größerer Selbsthemmungswinkel als für die Paarung Metall-Metall. For example, results for the mating metal Kera mik a greater self-locking angle than for the mating metal-metal. Die Einhaltung des Selbsthemmungswinkels ist von großer Bedeutung, weil bei einem größeren Kegelwinkel der Einsatz nicht zuverlässig in der Schale hält und weil bei einem kleineren Kegelwinkel der Einsatz nicht mehr oder nur mit großen Schwierigkeiten wieder aus der Schale gelöst werden kann. Compliance with the self-locking angle is important because not reliable where it has a larger cone angle of the insert in the shell and because it can no longer or only with great difficulty at a smaller cone angle of the application be released from the shell.

Bei den bekannten Gelenkpfannen ist es aus diesem Grund not wendig, für jedes Material des Einsatzes eine Schale mit einem Kegelwinkel der Innenkonusfläche zur Verfügung zu stellen, der dem Selbsthemmungswinkel der Paarung mit dem Einsatzmaterial entspricht. In the known joint sockets, it is not versatile for this reason, to provide for each material of the insert is a shell with a cone angle of the inner conical surface is available, which corresponds to the self-locking angle of the pairing with the feedstock. Dies bedeutet einen wesentlichen Kostenaufwand, insbesondere für die Lagerhaltung der Kliniken. This means a significant cost, especially for the storage of the clinics. Es müssen nämlich nicht nur unterschiedliche Schalentypen bevorratet werden, sondern auch noch jeder Schalentyp in unterschiedli chen Ausführungen für die verschiedenen Materialien des Ein satzes. It must in fact not only different shell types are stored, but also each shell type in differing chen versions for different materials of a sentence.

Aus der EP 0 694 294 A1 ist eine implantierbare Gelenkpfanne, insbesondere für Hüftgelenkendoprothesen bekannt, bei welcher in den Innenkonus der Schale eine Zwischenhülse eingesetzt wird, die ihrerseits mit einer Innenkonusfläche den Einsatz aufnimmt. From EP 0694294 A1 discloses an implantable joint socket, known in particular for hip joint prostheses, in which into the inner cone of the shell, an intermediate sleeve is used, in turn, receives with an inner conical surface of the insert. Die Zwischenhülse hat die Form eines Kegelstumpf mantels, wobei die Kegelwinkel der äußeren Mantelfläche und der inneren Mantelfläche übereinstimmen und dem Selbsthem mungswinkel zwischen Innenkonusfläche der Schale und Außenko nusfläche des Einsatzes entsprechen. The intermediate sleeve has openings corresponding to the shape of a truncated cone, wherein the cone angle of the outer surface and the inner circumferential surface and the match Selbsthem mung nusfläche angle between the inner cone surface of the shell and Außenko of the insert. Die Zwischenhülse wird selbsthemmend in dem Innenkonus der Schale gehalten und der Einsatz wird selbsthemmend in der Zwischenhülse gehalten. The intermediate sleeve is held self-locking in the inner cone of the shell and the insert is self-locking held in the intermediate sleeve. Die Zwischenhülse dient zum Entfernen des Einsatzes aus der Scha le. The intermediate sleeve is of the insert of the saddle le for removal. Hierzu weist die Zwischenhülse einen äußeren Rand mit Gewindebohrungen auf, in welche Gewindestifte eingeschraubt werden können, die gegen die Stirnfläche der Schale drücken, um so die Zwischenhülse mit dem Einsatz gegen die Selbsthem mung aus der Schale herauszudrücken. For this purpose, the intermediate sleeve to an outer periphery with threaded holes, into which can be threaded pins screwed which press against the end surface of the shell to expel as the intermediate sleeve with the insert against the Selbsthem mung from the shell. Auch hier ist für jede Materialpaarung von Schale und Einsatz eine besondere Konus form der Schale und der Zwischenhülse erforderlich. Again, for each material combination of shell and use a special cone of the shell and the intermediate sleeve form required.

Aus der DE 295 17 637 U1 ist eine endoprothetische Hüftgelenkpfanne bekannt, die eine implantierbare Schale und einen mittels einer Konusverbindung in der Schale gehaltenen Einsatz aufweist, welcher die Lagerfläche für den Gelenkkopf bildet. From DE 295 17 637 U1 an endoprosthetic acetabular cup is known which comprises an implantable shell and an insert held by means of a cone connection in the shell which forms the bearing surface for the joint head. Zwischen die Schale und den Einsatz ist ein Ring einsetzbar, der die Form eines Kreiskegelstumpfmantels hat. Between the shell and the insert a ring is used which has the shape of a circular truncated cone. Dieser Ring wird mit seiner äußeren Konusfläche in die Innenkonusfläche der Schale eingesetzt und nimmt mit seiner inneren Konusfläche den Außenkonus des Einsatzes auf. This ring is used with its outer conical surface into the inner conical surface of the shell and receives with its inner conical surface of the outer cone of the insert on. Der Ring weist an der inneren und der äußeren Konusfläche den gleichen Kegelwinkel auf und dient zur unterschiedlichen Anpassung der den Gelenkkopf aufnehmenden Lagerfläche des Einsatzes in Bezug auf die implantierte Schale. The ring has at the inner and the outer conical surface of the same cone angle and serves to adapt different one of the joint head receiving bearing surface of the insert relative to the implanted shell. Sind die innere und die äußere Konusfläche des Ringes koaxial angeordnet, so taucht der Gelenkkopf unterschiedlich tief in die Schale ein. Are the inner and the outer conical surface of the ring coaxially arranged, the joint head immersed to different depths in the shell. Sind die Achsen der inneren Konusfläche und der äußeren Konusfläche des Ringes im Winkel gegeneinander geneigt, so ergibt sich ein unterschiedlicher Neigungswinkel der den Gelenkkopf aufnehmenden Lagerfläche des Einsatzes gegenüber der implantierten Schale. The axes of the inner conical surface and the outer conical surface of the ring at an angle inclined to each other, the result is a different angle of inclination of the joint head receiving bearing surface of the insert relative to the implanted shell.

Der Erfindung liegt die Aufgabe zugrunde, eine implantierbare Gelenkpfanne, insbesondere für Hüftgelenkendoprothesen zur Verfügung zu stellen, bei welcher eine einheitliche Schale für Einsätze aus verschiedenen Materialien verwendet werden kann. The invention has for its object to provide an implantable acetabular cup, in particular for hip joint prostheses are available in which a unitary shell for inserts of different materials can be used.

Diese Aufgabe wird erfindungsgemäß gelöst durch eine Ge lenkpfanne mit den Merkmalen des Anspruchs 1. This object is achieved according to the invention by a Ge joint socket having the features of claim 1.

Vorteilhafte Ausführungen der Erfindung sind in den Unter ansprüchen angegeben. Embodiments of the invention are disclosed in the dependent claims.

Erfindungsgemäß ist ein Adapter vorgesehen, der in den Innen konus der Schale der Gelenkpfanne eingesetzt werden kann, um den Kegelwinkel für den Einsatz entsprechend dem Selbsthem mungswinkel des jeweils verwendeten Materials des Einsatz anzupassen. According to the invention an adapter is provided which can be inserted into the inner cone of the shell of the acetabular cup, to adjust the cone angle for use in accordance with the Selbsthem mung angle of the material of the insert used in each case. Die Schale weist eine Innenkonusfläche auf, deren Kegelwinkel dem größten bei dem üblicherweise verwendeten Materialien des Einsatzes auftretenden Selbsthemmungswinkel entspricht, z. The shell has an inner conical surface, whose cone angle corresponds to the largest self-locking angle occurring in the commonly used materials of the insert, eg. B. dem Selbsthemmungswinkel eines Keramik-Ein satzes. As the self-locking angle A of a ceramic block. Wird ein Einsatz aus diesem Material, z. If a use of this material for. B. ein Kera mik-Einsatz verwendet, so kann dieser Einsatz unmittelbar in die Sehale eingesetzt werden und wird selbsthemmend in dem Innenkonus der Schale gehalten. B. uses a Kera mik insert, this insert can be used directly in the Sehale and is self-locking retained in the inner cone of the shell. Soll ein Einsatz aus einem anderen Material verwendet werden, welches in Paarung mit dem Metall der Schale einen kleineren Selbsthemmungswinkel auf weist, so wird der Adapter in den Innenkonus der Schale einge setzt, wobei nun der kleinere Kegelwinkel der inneren Mantel fläche des Adapters den Selbsthemmungswinkel für den Einsatz definiert. To use an insert of a different material, which comprises in combination with the metal of the shell has a smaller self-locking angle, so the adapter is set in the inner cone of the shell is, the smaller cone angle of the inner cladding now face of the adapter to the self-locking angle for the use defined.

Dadurch wird der Aufwand für die Herstellung der Gelenkpfanne und insbesondere der Aufwand für die Lagerhaltung in der Kli nik erheblich reduziert. Thus, the expenditure for the production of the socket and in particular the cost of storage in the Keli technology is significantly reduced. Es ist nur noch notwendig, Schalenty pen auf Lager zu halten, die sich in Bezug auf die Verankerung unterscheiden. It is only necessary to keep Schalenty pen in stock, which differ in terms of anchoring. Es ist nicht mehr notwendig, von jedem dieser Typen auch noch unterschiedliche Ausführungen für unterschied liche Materialien des Einsatzes zu bevorraten. It is no longer necessary to stock even different versions for different materials Liche the use of each of these types.

Der Adapter wird in einer bevorzugten Ausführung in die Schale eingeschnappt, so dass der Adapter einfach eingesetzt werden kann. The adapter is snapped in a preferred embodiment in the shell so that the adapter can be easily inserted. Die Schnappverbindung besteht vorzugsweise aus einem an dem Adapter ausgebildeten Außenwulst, der in eine Hinter schneidung der Schale einschnappt. The snap connection is preferably a formed on the adapter outer bead which snaps into a rear Tailoring of the shell. Um das Einschnappen zu ermöglichen, ist der Adapter axial geschlitzt, wobei vorzugs weise ein durchgehender axialer Schlitz vorgesehen ist, um den Durchmesser des gesamten Adapters für das Einsetzen bzw. He rausnehmen zu verkleinern. In order to allow the snapping of the adapter is slotted axially, preferential, a continuous axial slot is provided to reduce take out the diameter of the entire adapter for insertion or He.

Im Folgenden wird die Erfindung anhand von in der Zeichnung dargestellten Ausführungsbeispielen näher erläutert. In the following the invention is explained in detail with reference to shown in the drawings embodiments. Es zeigen Show it

Fig. 1 eine Gelenkpfanne in teilweise axial geschnittener Seitenansicht, Fig. 1 a socket joint in a partly axially sectioned side view,

Fig. 2 eine erste Ausführung des Adapters in Axialansicht und in Seitenansicht und Fig. 2 shows a first embodiment of the adapter in axial view and in side view, and

Fig. 3 eine zweite Ausführung des Adapters in Axialansicht und in Seitenansicht. Fig. 3 shows a second embodiment of the adapter in axial view and in side view.

Fig. 1 zeigt die Gelenkpfanne einer implantierbaren Hüftge lenkendoprothese. Fig. 1 shows the socket of an implantable Hüftge lenkendoprothese. Die Gelenkpfanne weist eine Schale 10 auf, die mit einem selbstschneidenden Außengewinde 12 ausgebildet ist, um in den Beckenknochen eingeschraubt werden zu können. The acetabular cup has a shell 10 which is formed with a self-tapping external thread 12 to be screwed into the pelvic bone to. Die Schale 10 besteht vorzugsweise aus einer Titan. The tray 10 is preferably made of a titanium. Andere Ausführungen der Schale 10 und andere Arten der Befestigung der Schale 10 in dem Knochen sind ebenfalls bekannt und können erfindungsgemäß in gleicher Weise verwendet werden. Other versions of the tray 10 and other ways of attaching the shell 10 in the bone are also known and can be used according to the invention in the same way.

Die Schale 10 weist eine Innenkonusfläche 14 auf, die sich nach innen verjüngt und an ihrem inneren Ende mit einer Hin terschneidung 16 erweiterten Durchmessers in den abgerundet flachen Schalenboden 18 übergeht. The shell 10 has an inner conical surface 14 which merges tapers inwardly at its inner end with a Hin terschneidung 16 expanded diameter in the rounded flat shell bottom 18th

In die Schale 10 wird ein Einsatz 20.1 bzw. 20.2 eingesetzt, der eine innere konkave halbkugelförmige Lagerfläche 22 auf weist. In the shell 10, an insert is placed 20.1 or 20.2, which has an inner concave semi-spherical bearing surface 22. In die Lagerfläche 22 wird der nicht dargestellte Ku gelkopf der Hüftgelenkendoprothese eingesetzt und gleitend gelagert. In the bearing surface 22 of the Ku not shown, is used gelkopf the hip joint and slidably supported.

Die Innenkonusfläche 14 , die die Form eines geraden Kreiske gelstumpfes hat, weist einen Kegelwinkel auf, der dem Selbst hemmungswinkel einer Metall-Keramik-Gleitpaarung entspricht. The inner conical surface 14 having the shape of a straight gelstumpfes Kreiske, has a cone angle corresponding to the self-locking angle a metal-ceramic bearing. Dieser Kegelwinkel (Winkel zwischen zwei diametralen Mantelli nien) beträgt ca. 19°. This cone angle (angle between two diametrical Mantelli nien) is approximately 19 °.

In die Innenkonusfläche 14 der Schale 10 kann ein Einsatz 20.1 aus Keramik-Material eingesetzt werden. In the inner cone surface 14 of the shell 10, an insert 20.1 of ceramic material may be used. Dieser Einsatz 20.1 weist eine äußere Mantelfläche 24.1 auf, die in der Form der Innenkonusfläche 14 der Schale 10 entspricht, dh ebenfalls die Form eines geraden Kreiskegelstumpfes hat, dessen Kegelwinkel mit dem Kegelwinkel der Innenkonusfläche 14 der Schale 10 übereinstimmt. This insert 20.1 has an outer circumferential surface 24.1, which corresponds to the shape of the inner conical surface 14 of the shell 10, that is also in the shape of a right circular truncated cone matches the taper angle with the taper angle of the inner conical surface 14 of the shell 10 degrees. An die äußere Mantelfläche 24.1 schließt sich ein Einsatzboden 26 an, der in dem Schalenboden 18 der Schale 10 aufgenommen wird. On the outer surface 24.1, a bottom insert 26 includes at which is accommodated in the tray bottom 18 of the shell 10 degrees. Wird der Einsatz 20.1 aus Keramik-Material in die Schale 10 eingesetzt und leicht einge schlagen, so ergibt sich eine selbsthemmende Konusverbindung zwischen der äußeren Mantelfläche 24.1 des Einsatzes 20.1 und der Innenkonusfläche 14 der Schale 10 , welche den Einsatz 20.1 fest in der Schale 10 hält. When the insert 20.1 of ceramic material inserted into the tray 10, and easily taken, the result is a self-locking taper connection between the outer surface 24.1 of the insert 20.1 and the inner cone surface 14 of the shell 10 which holds the insert 20.1 fixed in the shell 10 ,

Um den Einsatz 20.1 im Bedarfsfalle wieder aus der Schale 10 entfernen zu können, sind an dem Einsatz 20.1 nicht darge stellte, an sich bekannte Mittel vorgesehen, um ein Extrak tionsinstrument ansetzen zu können, mit welchem der Einsatz mit leichten Hammerschlägen unter Überwindung der Selbsthem mung der Konusverbindung wieder gelöst werden kann. In order to remove the insert 20.1 in case of need again from the shell 10, on the insert 20.1 not Darge presented, provided means known per se, to schedule a Extrak tion instrument, with which the insert with light hammer blows while overcoming the Selbsthem mung the cone connection can be released again.

Alternativ zu dem Einsatz 20.1 aus Keramik-Material kann in die Schale 10 auch ein Einsatz 20.2 aus Metall eingesetzt werden. Alternatively to the insert 20.1 of ceramic material in the shell 10 and an insert 20.2 can be used made of metal. Da eine Metall-Metall-Gleitpaarung einen kleineren Selbsthemmungswinkel aufweist als die Metall-Keramik-Gleit paarung, wird in die Innenkonusfläche 14 der Schale 10 ein Adapter 28 eingesetzt. Since a metal-to-metal sliding contact surface having a smaller self-locking angle than the metal-ceramic sliding pairing, an adapter 28 is inserted into the inner cone surface 14 of the shell 10 degrees. Der Adapter 28 besteht aus Metall, vorzugsweise aus Titan wie die Schale 10 . The adapter 28 is made of metal, preferably of titanium like the shell 10 degrees. Der Adapter 28 hat die Form eines geraden Kreiskegelstumpfmantels. The adapter 28 has the shape of a right circular truncated cone. Die äußere Mantelfläche 30 des Adapters 28 weist den selben Kegelwinkel auf wie die Innenkonusfläche 14 der Schale 10 . The outer circumferential surface 30 of the adapter 28 has the same cone angle as the inner cone surface 14 of the shell 10 degrees. Auf diese Weise kann der Adapter 28 passend in die Innenkonusfläche 14 einge setzt werden. In this way, the adapter 28 can be fit into the inner conical surface 14 is set. Die innere Mantelfläche 32 des Adapters 28 weist einen kleineren Kegelwinkel auf als die äußere Mantelfläche 30 . The inner circumferential surface 32 of the adapter 28 has a smaller cone angle than the outer surface area of the 30th Dieser Kegelwinkel der inneren Konusfläche 32 entspricht dem Selbsthemmungswinkel einer Metall-Metall-Gleitpaarung und beträgt beispielsweise etwa 10°. This cone angle of the inner conical surface 32 corresponds to the self-locking angle of a metal-metal sliding and is for example about 10 °.

In den in die Schale 10 eingesetzten Adapter 28 wird der Ein satz 20.2 aus Metall eingesetzt. In the inserted into the shell 10 of the adapter 28, a set of metal used 20.2. Der Einsatz 20.2 entspricht in seiner Form im Wesentlichen dem Einsatz 20.1 aus Keramik- Material. The use of 20.2 corresponds in shape substantially to the insert 20.1 of ceramic material. Seine kegelstumpfförmige äußere Mantelfläche 24.2 weist jedoch einen Kegelwinkel auf, der dem Kegelwinkel der inneren Mantelfläche 32 des Adapters 28 entspricht. However, its truncated cone-shaped outer surface 24.2 has a cone angle corresponding to the cone angle of the inner surface 32 of the adapter 28th Wird der Einsatz 20.2 in den Adapter 28 eingeschlagen, so ergibt sich dadurch eine selbsthemmende Konusverbindung zwischen der äuße ren Mantelfläche 24.2 des Einsatzes 20.2 und der inneren Man telfläche 32 des Adapters 28 . When the insert is driven into the adapter 28 20.2, so this results in a self-locking taper connection between the äuße ren lateral surface 24.2 of the insert 20.2 and the inner one 32 of the adapter telfläche 28th Diese selbsthemmende Konusver bindung hält den Einsatz 20.2 aus Metall in dem Adapter 28 , der seinerseits in der Schale 10 gehalten ist. This self-locking Konusver bond holds the insert 20.2 of metal in the adapter 28, which in turn is held in the shell 10th Auch hier kann der Einsatz 20.2 in der vorstehend beschriebenen Weise wieder unter Überwindung der Selbsthemmung der Konusverbindung aus dem Adapter 28 gelöst werden. Again, the insert 20.2 in the manner described above can be released by overcoming the self-locking cone connection from the adapter 28th

Fig. 2 zeigt eine erste Ausführung des Adapters 28 . Fig. 2 shows a first embodiment of the adapter 28th Der Adap ter 28 hat die Form eines Kegelstumpfmantels, an dessen Ende mit dem kleineren Durchmesser ein umlaufender Außenwulst 34 angeformt ist. The adapter is installed 28 has the shape of a truncated cone at the end with the smaller diameter, a peripheral outer bead is formed 34th Mit diesem Außenwulst 34 schnappt der Adapter 28 in die Hinterschneidung 16 der Schale 10 ein, die sich innen an deren Innenkonusfläche 14 anschließt. This outer bead 34 of the adapter 28 snaps into the undercut 16 of the shell 10, which follows the inside of the inner conical surface fourteenth Dadurch wird der Adapter 28 formschlüssig in der Innenkonusfläche 14 der Schale 10 gehalten. Thus, the adapter 28 is positively held in the inner cone surface 14 of the shell 10 degrees.

Um den aus Metall bestehenden Adapter 28 mit seinem Außenwulst 34 in die Hinterschneidung 16 einschnappen zu können, weist der Adapter 28 einen axial durchgehenden Schlitz 36 auf, des sen Breite beispielsweise etwa 3 mm beträgt. To be able to snap into the undercut 16 the metal-made adapter 28 with its external bead 34, the adapter 28 has an axial through slot 36, the width sen example, is about 3 mm. Der Adapter 28 kann durch axiales Eindrücken in den Innenkonus der Schale 10 oder mittels eines geeigneten Werkzeuges gegen seine Elastizi tät im Umfang um die Breite dieses Schlitzes 36 zusammengezo gen werden, so dass der Adapter 28 in die Innenkonusfläche 16 der Schale 10 eingesetzt werden kann. The adapter 28 may zusammengezo be gen by axial pressing into the inner cone of the shell 10 or by means of a suitable tool against its Elastizi ty circumferentially about the width of this slot 36 so that the adapter can be inserted into the inner cone surface 16 of the shell 10 28th Nach dem Einsetzen wird der Adapter 28 freigegeben, so dass er sich wieder elastisch auseinander spreizt und mit seinem Außenwulst 34 in die Hin terschneidung 16 der Schale 10 eingreift und formschlüssig in der Schale 10 gehalten wird. After insertion of the adapter 28 is released, so that it again spread apart and elastically with its external bead 34 into the Hin terschneidung 16 of the shell 10 engages and is positively retained in the shell 10 degrees. Dabei hält die Elastizität des Adapters 28 diesen mit seiner äußeren Mantelfläche 30 voll flächig und stabil an der Innenkonusfläche 16 der Schale 10 anliegend. The elasticity of the adapter 28 holds it over the entire surface and stably resting with its outer surface 30 to the inner conical surface 16 of the shell 10 degrees. Umgekehrt kann der Adapter 28 aus der Schale 10 wieder entnommen werden, indem der Adapter 28 wieder um die Breite des Schlitzes 36 zusammengezogen wird. Conversely, the adapter 28 from the shell 10 can be removed again by the adapter 28 is again contracted by the width of the slot 36th

In Fig. 3 ist eine weitere Ausführung des Adapters 28 ge zeigt. In Fig. 3 a further embodiment of the adapter 28 is open shows. In dieser Ausführung ist der Adapter 28 nicht durch gehend geschlitzt, sondern weist in seinem inneren Rand mit dem kleineren Durchmesser eine Vielzahl von in gleicher Winkelteilung gegeneinander versetzten axialen Einschnitten 38 auf. In this embodiment, the adapter 28 is not slit continuous, but includes a plurality of mutually offset in the same angular pitch axial incisions 38 in its inner edge with the smaller diameter. Durch die Einschnitte 38 wird der innere Rand des Adap ters 28 in einzelne Federzungen unterteilt, die jeweils an ihrem freien Ende den Außenwulst 34 als Rastnase aufweisen. By the incisions 38 of the inner edge of the Adap ters is divided into individual spring tongues 28, each having at its free end the outer bead 34 as a detent nose. Beim Eindrücken des Adapters 28 in die Innenkonusfläche 14 der Schale 10 werden diese durch die Einschnitte 38 gebildeten Federzungen elastisch nach innen gedrückt, bis der Außenwulst 34 in die Hinterschneidung 16 gelangt und die Federzungen wieder auseinanderspreizen können, so dass der Adapter 28 formschlüssig in der Schale 10 gehalten wird. When pushing the adapter 28 into the inner conical surface 14 of the shell 10, these spring tongues formed by the incisions 38 are elastically pushed inwardly until the outer bead enters the undercut 16 34 and the spring tongues can be spread apart again, so that the adapter 28 positively in the tray is maintained 10th In dieser Aus führung ist der Adapter 28 unlösbar mit der Schale 10 verbun den. In this from the guide adapter 28 is inextricably linked to the tray 10-jointed.

Es ist ohne weiteres ersichtlich, dass in die Schale 10 auch ein Einsatz aus Kunststoff, z. It is readily apparent that in the shell 10 and an insert made of plastic, for. B. aus Polyethylen eingesetzt werden kann. B. can be used polyethylene. In dieser Ausführung entspricht der Einsatz in seiner Form dem Einsatz 20.1 aus Keramik-Material. In this embodiment, the insert corresponding in shape to the insert 20.1 of ceramic material. Da das Kunststoff-Material eine höhere elastische Verformbarkeit aufweist, kann an der äußeren Mantelfläche des Einsatzes aus Kunststoff ein Außenwulst angeformt sein, der dem Außenwulst 34 des Adapters 28 entspricht, so dass der Einsatz aus Kunst stoff-Material mit diesem Außenwulst in die Hinterschneidung 16 der Schale 10 einschnappen kann. Since the plastic material has a higher elastic deformability, an outer bead may be formed on the outer surface of the insert made of plastic, which corresponds to the outer bead 34 of the adapter 28, so that the use of plastic material with this outer bead in the undercut 16 the shell can snap 10th Der Einsatz aus Kunststoff wird somit formschlüssig gehalten, so dass keine selbsthemmen de Konusverbindung notwendig ist. The use of plastics is thus held positively, so that no self-inhibit de tapered connection is necessary.

Bezugszeichenliste LIST OF REFERENCE NUMBERS

10 10

Schale Bowl

12 12

Außengewinde external thread

14 14

Innenkonusfläche Internal conical surface

16 16

Hinterschneidung undercut

18 18

Schalenboden shell bottom

20.1 20.1

Einsatz (Keramik) Use of (ceramic)

20.2 20.2

Einsatz (Metall) Insert (metal)

22 22

Lagerfläche storage area

24.1 24.1

äußere Mantelfläche von outer surface of

20.1 20.1

24.2 24.2

äußere Mantelfläche von outer surface of

20.2 20.2

26 26

Einsatzboden use ground

28 28

Adapter adapter

30 30

äußere Mantelfläche von outer surface of

28 28

32 32

innere Mantelfläche von inner lateral surface of

28 28

34 34

Außenwulst outer bead

36 36

Schlitz slot

38 38

Einschnitte cuts

Claims (8)

  1. 1. Implantierbare Gelenkpfanne, insbesondere für Hüftgelenk endoprothesen, mit einer Schale ( 10 ) und einem mittels einer selbsthemmenden Konusverbindung in der Schale ( 10 ) gehaltenen Einsatz ( 20.1 , 20.2 ), gekennzeichnet durch einen Adapter ( 28 ), der zur Verkleinerung des Kegelwinkels der selbsthem menden Konusverbindung in die Schale ( 10 ) einsetzbar ist und der die Form eines Kegelstumpfmantels hat, dessen äußere Man telfläche ( 30 ) einen größeren Kegelwinkel aufweist als dessen innere Mantelfläche ( 32 ). 1. An implantable acetabular cup, endoprostheses in particular for hip joint having a shell (10) and one in the shell by means of a self-locking cone connection (10) insert held (20.1, 20.2), characterized by an adapter (28) of the reduction of the cone angle selbsthem Menden cone joint is insertable into the shell (10) and having the shape of a truncated cone, whose outer Man telfläche (30) comprises a larger cone angle than the inner lateral surface (32).
  2. 2. Gelenkpfanne nach Anspruch 1, dadurch gekennzeichnet, dass die Schale ( 10 ) eine Innenkonusfläche ( 14 ) aufweist, deren Kegelwinkel dem Selbsthemmungswinkel eines Einsatzes ( 20.1 ) aus Keramik-Material entspricht, dass der Kegelwinkel der äußeren Mantelfläche ( 30 ) des Adapters ( 28 ) dem Kegelwinkel der Innenkonusfläche ( 14 ) der Schale ( 10 ) entspricht und dass der Kegelwinkel der inneren Mantelfläche ( 32 ) des Adapters ( 28 ) dem Selbsthemmungswinkel eines Einsatzes ( 20.2 ) aus Me tall entspricht. 2. An acetabular cup according to claim 1, characterized in that the shell (10) has an inner conical surface (14), the cone angle of the self-locking angle of an insert (20.1) of ceramic material corresponds to that the cone angle of the outer circumferential surface (30) of the adapter ( 28) (the taper angle of the inner conical surface 14) of the shell (10) and that the cone angle of the inner circumferential surface (32) of the adapter (28) corresponds to the self-locking angle of an insert (20.2) from Me tall.
  3. 3. Gelenkpfanne nach Anspruch 2, dadurch gekennzeichnet, dass die Schale ( 10 ) aus Metall besteht, dass der Adapter ( 28 ) aus Metall besteht, dass der Kegelwinkel (Winkel zwischen zwei diametralen Mantellinien) der Innenkonusfläche ( 14 ) der Scha le ( 10 ) und der Kegelwinkel der äußeren Mantelfläche ( 30 ) des Adapters ( 28 ) ca. 19° betragen und dass der Kegelwinkel der inneren Mantelfläche ( 32 ) des Adapters ( 28 ) ca. 10° beträgt. 3. An acetabular cup according to claim 2, characterized in that the shell (10) consists of metal, that the adapter (28) consists of metal, that the cone angle ((angle between two diametrically opposite surface lines) of the inner conical surface (14) of the saddle le 10 ) and the cone angle of the outer circumferential surface (30) of the adapter (28) is about 19 ° and that the cone angle of the inner circumferential surface (32) of the adapter (28) is approximately 10 °.
  4. 4. Gelenkpfanne nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Adapter ( 28 ) in die Schale ( 10 ) formschlüssig einrastbar ist. 4. An acetabular cup according to any one of the preceding claims, characterized in that the adapter (28) in the shell (10) engages positively latched.
  5. 5. Gelenkpfanne nach Anspruch 4, dadurch gekennzeichnet, dass der Adapter ( 28 ) einen Außenwulst ( 34 ) aufweist, der in eine Hinterschneidung ( 16 ) der Schale ( 10 ) eingreift. 5. An acetabular cup according to claim 4, characterized in that the adapter (28) has an outer bead (34) which engages in an undercut (16) of the shell (10).
  6. 6. Gelenkpfanne nach Anspruch 5, dadurch gekennzeichnet, dass der Außenwulst ( 34 ) an dem Ende des Adapters ( 28 ) mit dem kleineren Durchmesser angeformt ist und dass sich die Hin terschneidung ( 16 ) innen an die Innenkonusfläche ( 14 ) der Schale ( 10 ) anschließt. 6. An acetabular cup according to claim 5, characterized in that the outer bead (34) at the end of the adapter (28) is integrally formed with the smaller diameter and that the Hin terschneidung (16) inside the inner cone surface (14) of the shell (10 ) followed.
  7. 7. Gelenkpfanne nach Anspruch 6, dadurch gekennzeichnet, dass der Adapter ( 28 ) zumindest im Bereich des Außenwulstes ( 34 ) axial geschlitzt ist. 7. An acetabular cup according to claim 6, characterized in that the adapter (28) is axially slotted at least in the region of the outer bead (34).
  8. 8. Gelenkpfanne nach Anspruch 7, dadurch gekennzeichnet, dass der Adapter ( 28 ) einen axial durchgehenden Schlitz ( 36 ) auf weist. 8. An acetabular cup according to claim 7, characterized in that the adapter (28) an axially continuous slot (36) has on.
DE1999119083 1999-04-27 1999-04-27 Implantable acetabulum, particularly for hip joint prostheses Expired - Fee Related DE19919083C1 (en)

Priority Applications (1)

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DE1999119083 DE19919083C1 (en) 1999-04-27 1999-04-27 Implantable acetabulum, particularly for hip joint prostheses

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999119083 DE19919083C1 (en) 1999-04-27 1999-04-27 Implantable acetabulum, particularly for hip joint prostheses
PCT/EP2000/003846 WO2000064383A1 (en) 1999-04-27 2000-04-27 Implantable joint socket, especially for hip joint endoprotheses

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