CH642840A5 - A surgical implant, particularly hueftgelenkpfanne. - Google Patents

A surgical implant, particularly hueftgelenkpfanne. Download PDF

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Publication number
CH642840A5
CH642840A5 CH106280A CH106280A CH642840A5 CH 642840 A5 CH642840 A5 CH 642840A5 CH 106280 A CH106280 A CH 106280A CH 106280 A CH106280 A CH 106280A CH 642840 A5 CH642840 A5 CH 642840A5
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CH
Switzerland
Prior art keywords
surgical implant
characterized
implant according
acetabulum
bone
Prior art date
Application number
CH106280A
Other languages
German (de)
Inventor
Kurt Karpf
Original Assignee
Allo Pro Ag
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.)
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Publication date
Application filed by Allo Pro Ag filed Critical Allo Pro Ag
Priority to CH106280A priority Critical patent/CH642840A5/en
Publication of CH642840A5 publication Critical patent/CH642840A5/en

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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
    • A61F2/32Joints 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
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603Special 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
    • A61F2/4609Special 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 acetabular 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
    • A61F2002/30316The 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
    • A61F2002/30317The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30322The prosthesis having different structural features at different locations within the same prosthesis differing in surface structures
    • 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
    • A61F2002/30317The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30324The prosthesis having different structural features at different locations within the same prosthesis differing in thickness
    • 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
    • A61F2/30767Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30841Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
    • A61F2002/30843Pyramidally-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
    • 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
    • A61F2/30767Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3085Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • 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
    • A61F2/30767Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3085Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A61F2002/30858Threads interrupted by grooves or sidewalls, e.g. flat sidewalls
    • 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
    • A61F2/30767Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3085Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A61F2002/30861Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface having threads of increasing or decreasing height
    • 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
    • A61F2/30767Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3085Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A61F2002/30871Trapezoidal threads
    • 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
    • A61F2/30767Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3085Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with a threaded, e.g. self-tapping, bone-engaging surface, e.g. external surface
    • A61F2002/30873Threadings machined on non-cylindrical external surfaces
    • A61F2002/30874Threadings machined on non-cylindrical external surfaces on conical, e.g. frustoconical, surfaces
    • 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
    • A61F2/30767Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth
    • A61F2/30771Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30904Special external or bone-contacting surfaces, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
    • 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
    • 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
    • A61F2/32Joints for the hip
    • 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
    • A61F2002/3464Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped having a frustoconical external shape, e.g. entirely frustoconical partially 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
    • A61F2250/00Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0026Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in surface structures
    • 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
    • A61F2250/0014Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0036Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in thickness
    • 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

Description

Die vorliegende Erfindung betrifft ein chirurgisches Implantat, welches zur Verankerung im Knochen vorgesehen ist und auf seiner Aussenwand umlaufende Erhöhungen als Verankerungshilfen aufweist. The present invention relates to a surgical implant, which is provided for anchoring in the bone and having on its outer circumferential wall increases as anchorage aids.

Der Erfindungsgegenstand wird nachstehend insbesondere anhand künstlicher Hüftgelenke beschrieben. The subject invention will now be described with particular reference artificial hip joints.

Der künstliche Hüftgelenkersatz besteht normalerweise aus einer Hüftgelenkpfanne und einer Schaftprothese. The artificial hip replacement usually consists of an acetabular cup and a stem prosthesis. Die Hüftgelenkpfanne wird im Acetabulum und die Schaftprothese im Oberschenkelknochen (Femur) fixiert. The acetabular cup is in the acetabulum and the shank prosthesis (femur) in the femur fixed.

Bei den bekannten Hüftgelenkpfannen, kurz auch Hüft-pfannen genannt, unterscheiden wir zwei Hauptgruppen: In the known acetabular cups, also briefly called hip pans, we distinguish two main groups:

a) Hüftpfannen, welche mit Knochenzement im knöchernen Acetabulum einzementiert werden. a) acetabular which are cemented with bone cement in the bony acetabulum.

b) Hüftpfannen, welche in ihrer Aussenform so ausgebildet sind, dass sie ohne Knochenzement fixiert werden können. b) acetabular formed in its outer shape such that they can be fixed without bone cement.

Die vorliegende Erfindung betrifft chirurgische Implantate, welche zementlos fixiert werden, dh beispielsweise eine Hüftpfanne der Gruppe b. The present invention relates to surgical implants which are fixed without cement, that is, for example, an acetabular cup of the group b.

Es sind zementlose Hüftpfannen bekannt, welche an der Aussenfläche z. There are known cementless acetabular that on the outer surface z. B. Gewindezüge, Verankerungsstifte usw. aufweisen. B. having thread grooves, securing pins, etc.. Bei allen bisher bekannten Hüftpfannen kommt es immer wieder zu sogenannten Lockerungen, welche eine weitere Operation notwendig machen. In all previously known acetabular it always comes back to the so-called easing which make further surgery necessary. Es wird angenommen, dass zwischen dem natürlichen, elastischen Acetabulum und der künstlichen Hüftpfanne Spannungen entstehen, welche zu diesen Lockerungen führen. It is believed that arise between the natural acetabulum and the elastic artificial acetabulum stresses which lead to these relaxations.

Aufgabe der Erfindung ist die Schaffung eines im Knochen zu fixierenden Implantats, zB einer Hüftpfanne, bei welchem diese Lockerungen im Knochen verhindert werden können. The object of the invention is to provide a to be fixed in the bone implant, such as a hip socket in which these relaxations can be prevented in the bone.

Das chirurgische Implantat der oben beschriebenen Art zeichnet sich erfindungsgemäss dadurch aus, dass die Erhöhungen in vorbestimmten Abständen durch Einkerbungen unterbrochen sind. The surgical implant of the type described above is characterized according to the invention is characterized in that the ridges are interrupted by notches at predetermined intervals.

Die Erhöhungen sind dabei vorzugsweise in Form von Gewindezügen vorgesehen und die Einkerbungen sägezahn-artig ausgebildet. The elevations are preferably provided in the form of screw threads and the notches formed sawtooth-like. Damit haben die Erhöhungen selbst eine sägezahnartige Form. Thus, the increases have even a sawtooth shape.

Ausführungsbeispiele des Erfindungsgegenstandes werden nachstehend anhand der Zeichnung noch etwas näher erläutert. Embodiments of the invention will be described later in more detail using the drawing. Es zeigt: It shows:

Fig. 1 eine erfindungsgemäss ausgerüstete Hüftgelenk-5 pfanne, teilweise im Schnitt, Fig. 1 a according to the invention equipped hip joint pan 5, partly in section,

Fig. 2 die Hüftpfanne nach Fig. 1 in Draufsicht, Fig. 2, the acetabular cup of Fig. 1 in top view,

Fig. 3 einen Längsschnitt entlang eines erfindungsgemäss ausgebildeten Gewindezuges, Fig. 3 a longitudinal section along a thread according to the invention formed train,

Fig. 4 eine Draufsicht auf einen Sägezahn eines Gewin-10 dezuges, und Fig. 4 dezuges a plan view of a saw tooth of a threaded-10, and

Fig. 5 einen Teilschnitt durch eine Variante einer Hüftgelenkpfanne. Fig. 5 is a partial section through a variant of an acetabular cup.

Die nachfolgende Beschreibung bezieht sich auf eine 15 Hüftgelenkpfanne, eine besonders geeignete Anwendungsform der Erfindung, und beschreibt die wesentlichsten Details in der Reihenfolge der Figuren. The following description relates to an acetabular cup 15, a particularly suitable embodiment of the invention, and describes the most significant details in the order of FIGS.

Die Pfanneninnenseite 1 ist in üblicher Weise ausgebildet. The pan interior side 1 is formed in a conventional manner. Auf dieser Fläche 1 bewegt sich die Kugel der Schaft-20 prothese (nicht dargestellt). On this surface, the ball 1 of the shaft 20 moves prosthesis (not shown). Dank der Anschrägung 2 der Öffnung der Pfanne erhält die Schaftprothese zusätzliche Bewegungsfreiheit und verhindert das Luxieren der Kugel. Thanks to the chamfer 2 of the opening of the pan, the shaft prosthesis receives additional freedom of movement and prevents luxation of the ball.

Auf der rechten Seite von Fig. 1 ist eine Ansicht der Aussenfläche gezeigt. On the right side of Fig. 1 is a view of the outer surface is shown. Die gesamte Oberfläche besteht aus klei-25 nen, unsymmetrischen Pyramiden 3. Diese Pyramiden 3 liegen geordnet auf einer schraubenlinienförmigen Abwicklung am Pfannenumfang. The entire surface is made of clay-25 NEN, asymmetrical pyramids are 3 3. These pyramids arranged on a helical processing on ladle screen. In Eindrehrichtung gesehen, haben die Pyramiden 3 (Sägezähne) eine Fläche 8 mit einer Neigung zwischen 20 und 45 Grad (s. Fig. 3 bzw. 4). In screwing seen, the pyramids have 3 (saw teeth) includes a surface 8 with an inclination between 20 and 45 degree (s. Fig. 3 or 4). Die Rücken-30 Seiten 9 der Pyramiden - wiederum in Eindrehrichtung gesehen - fallen senkrecht, Richtung Pfannenzentrum ab. The back 30 pages 9 of the pyramids - again seen in the screw - fall vertically, towards skillet from the center.

Während dem Eindrehen der Hüftpfanne verdrängen die Flächen 8 und 10 den Knochen und verdichten denselben zusätzlich. While screwing the acetabulum, the surfaces 8 and 10 displace the bone and compress the same addition. Die senkrecht angeordnete Fläche 9 auf der Rük-35 kenseite der Pyramiden verhindert das Zurückdrehen der Hüftpfanne. The vertically disposed surface 9 on the Rpt-35 kenseite of the pyramids prevents the reverse rotation of the acetabulum.

Die Pyramidenformen vergrössern gleichzeitig die Berührungsfläche zwischen Hüftpfanne und tragendem Knochen. The pyramid shapes enlarge the same time the contact surface between the acetabulum and carrying bones. Bei Belastung der Hüftpfanne wird dadurch der entstehende 40 Druck pro Flächeneinheit verringert, und es darf mit weniger Knochenabbau gerechnet werden. If a load of the acetabular cup thereby the resulting pressure 40 per unit area is reduced, and it can be expected less bone loss.

Die Pyramidenformen stützen die Hüftpfanne im Knochen in allen Richtungen ab. The pyramid shapes support the acetabulum in the bone off in all directions.

Der äussere Pfannenboden 4 ist konvex (s. Fig. 1). The outer pan bottom 4 is convex (s. Fig. 1). Diese 45 Form nähert sich der ursprünglichen Acetabulumform. This form 45 approaches the original Acetabulumform.

Beim Einsetzen der Hüftpfanne hilft diese konvexe Partie 4 mit, die Hüftpfanne richtig zu zentrieren und in die genaue Eindrehrichtung zu bringen. Upon insertion of the acetabular cup this convex game 4 helps to center the hip socket properly and bring in the exact screwing.

Der Übergang von der konvexen Form zu den Pyrami-50 denflächen wird grösser als bei flacher Bodengestaltung. The transition from a convex shape to the Pyrami-50 is greater than denflächen flat floor design. Dieser grössere Winkel verringert in dieser Partie die Spannungen auf den umliegenden Knochen bei eingesetzter Hüftpfanne. This greater angle decreases in this section, the voltages on the surrounding bone when inserted acetabular cup.

Die tragende Aussenseite der Hüftpfanne mit den Pyra-55 miden kann sowohl zylindrisch als auch als Kegelstumpf 5 ausgebildet sein. The load-bearing outer surface of the acetabulum may miden with the Pyra-55 both be formed cylindrical or as a truncated cone. 5

Bei der Form eines Kegelstumpfes ist der seitliche Konuswinkel üblicherweise kleiner als 20 Grad (anatomisch bedingt). In the shape of a truncated cone, the lateral taper angle is typically less than 20 degrees (anatomical reasons).

60 Der Winkel des Kegelstumpfes muss nicht identisch mit dem Winkel der Pyramidenspitzen sein, dh die Pyramiden II am oberen grossen Umfang können höher sein als die Pyramiden 1Y unten am Übergang zum konvexen Pfannenboden, wie Fig. 5 zeigt. 60 The angle of the truncated cone need not be identical with the angle of the pyramid tips be, that the pyramids II at the upper large scale may be higher than the pyramids 1Y bottom at the transition to the convex pan bottom, as Fig. 5 shows.

es Mit dieser Winkeldifferenz kann die Hüftpfanne am oberen Umfang stärker im Acetabulum verankert werden, ohne dass unten im Grund des Acetabulums eine höhere Keilwirkung entsteht, welche das Becken sprengen könnte. the hip socket, it can be anchored to the upper periphery stronger in the acetabulum This angular difference without down a higher wedge effect is created in the base of the acetabulum, which could blow up the pool.

3 3

642 840 642840

Wie bereits beschrieben, sind die Pyramiden in der Eindrehrichtung schräg ansteigend ausgebildet, während die Rückseite auf das Pfannenzentrum hin steil abfällt. As already described, the pyramids in the screwing-in direction are formed obliquely rising, while the rear side slopes down steeply to the pan center.

Wenn die Hüftpfannen aus stark elastischem Werkstoff, z. When the acetabular of highly elastic material, such. B. Kunststoff, hergestellt werden, legen sich während dem Eindrehen die Pyramiden zurück. As plastic are produced, the pyramids lie back while screwing. Bei Stillstand der Hüftpfanne werden die Pyramiden nach aussen aufgestellt und verhindern das Rückwärtsdrehen der Pfanne. At standstill the acetabulum, the pyramids are placed outwards and prevent reverse rotation of the pan. Es entsteht durch diesen Effekt eine automatische Fixierung der Pfanne. The result of this effect, an automatic fixing of the pan. Durch die Form der Pyramiden wirkt sich diese Fixation in allen Richtungen aus. The shape of the pyramids, this fixation acts in all directions.

Wie Fig. 2 zeigt, befinden sich am oberen äusseren Pfannenrand zwei oder mehrere Ausschnitte 7 zum Einsetzen eines Eindrehwerkzeuges. As shown in FIG. 2, are located on the upper outer rim of the cup, two or more cut-outs 7 for inserting a Eindrehwerkzeuges. Die Ausschnitte dürfen keinesfalls in die Anschrägung 2 (Fig. 1) hineinführen, damit während s dem Eindrehen keine Spannungen die runde innere Pfannenform deformieren können. The cutouts may not in the chamfer 2 (Fig. 1) into lead so as to deform the round s inner cup shape screwing no tension.

Die Ausschnitte können je nach Werkstoff der Hüftpfanne verschiedene Formen aufweisen. The cut-outs can have various shapes depending on the material of the acetabulum.

io Als Werkstoffe für das Implantat bzw. die Hüftpfanne eignen sich Keramik, Kunststoff, z. io as materials for the implant or the acetabulum to ceramics, plastics, z are. B. Polyäthylen usw. As polyethylene, etc.

s s

2 Blatt Zeichnungen 2 sheets drawings

Claims (6)

642 840 PATENTANSPRÜCHE 642840 CLAIMS
1. Chirurgisches Implantat, welches zur Verankerung im Knochen vorgesehen ist und auf seiner Aussenwand umlaufende Erhöhungen als Verankerungshilfen aufweist, dadurch gekennzeichnet, dass die Erhöhungen durch Einkerbungen unterbrochen sind. 1. A surgical implant, which is provided for anchoring in the bone and having on its outer circumferential wall increases as an anchoring support, characterized in that the ridges are interrupted by indentations.
2. Chirurgisches Implantat nach Anspruch 1, dadurch gekennzeichnet, dass die Erhöhungen als Gewindezüge ausgebildet sind. 2. A surgical implant according to claim 1, characterized in that the elevations are formed as screw threads.
3. Chirurgisches Implantat nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Einkerbungen als sägezahn-artige Unterbrechungen ausgebildet sind. 3. A surgical implant according to claim 1 or 2, characterized in that the notches are formed as saw-tooth-like interruptions.
4. Chirurgisches Implantat, nach einem der Ansprüche 1—3, dadurch gekennzeichnet, dass seine Aussenwand einen rotationssymmetrischen Kegelstumpf bildet. 4. A surgical implant according to any of claims 1-3, characterized in that its outside wall forms a rotationally symmetrical truncated cone.
5. Chirurgisches Implantat nach Ansprüchen 2 und 3, dadurch gekennzeichnet, dass die ebenfalls sägezahnför-migen Erhöhungen die Schrägen in Eindrehrichtung vorn aufweisen und dass die Spitzen abgeflacht sind. 5. A surgical implant according to claims 2 and 3, characterized in that the also sägezahnför--shaped elevations have bevels in the screw forward and that the tips are flattened.
6. Chirurgisches Implantat nach einem der Ansprüche 1-5, dadurch gekennzeichnet, dass es als Hüftgelenkpfanne ausgebildet ist. 6. A surgical implant according to any one of claims 1-5, characterized in that it is designed as acetabulum.
CH106280A 1980-02-08 1980-02-08 A surgical implant, particularly hueftgelenkpfanne. CH642840A5 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH106280A CH642840A5 (en) 1980-02-08 1980-02-08 A surgical implant, particularly hueftgelenkpfanne.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH106280A CH642840A5 (en) 1980-02-08 1980-02-08 A surgical implant, particularly hueftgelenkpfanne.
DE19813101333 DE3101333A1 (en) 1980-02-08 1981-01-17 Surgical implant, especially acetabulum

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CH642840A5 true CH642840A5 (en) 1984-05-15

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Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3147707A1 (en) * 1981-05-18 1982-12-23 Mecron Med Prod Gmbh Part of a hip prosthesis
DE3322978A1 (en) * 1983-06-25 1985-01-10 Orthoplant Vertriebs Gmbh Shell-shaped acetabular prosthesis for a hip joint
FR2592787B1 (en) * 1986-01-10 1991-07-12 Jean Lagrange Screwed ring has retentive insert
US4846840A (en) * 1986-09-09 1989-07-11 Sylvain Leclercq Joint prosthesis
DK1093760T3 (en) 1993-06-10 2005-03-29 Karlin Technology Inc An apparatus for inserting spinal implants
US5015247A (en) * 1988-06-13 1991-05-14 Michelson Gary K Threaded spinal implant
US7452359B1 (en) 1988-06-13 2008-11-18 Warsaw Orthopedic, Inc. Apparatus for inserting spinal implants
US6120502A (en) 1988-06-13 2000-09-19 Michelson; Gary Karlin Apparatus and method for the delivery of electrical current for interbody spinal arthrodesis
US6770074B2 (en) 1988-06-13 2004-08-03 Gary Karlin Michelson Apparatus for use in inserting spinal implants
US7534254B1 (en) 1988-06-13 2009-05-19 Warsaw Orthopedic, Inc. Threaded frusto-conical interbody spinal fusion implants
US7491205B1 (en) 1988-06-13 2009-02-17 Warsaw Orthopedic, Inc. Instrumentation for the surgical correction of human thoracic and lumbar spinal disease from the lateral aspect of the spine
US6923810B1 (en) 1988-06-13 2005-08-02 Gary Karlin Michelson Frusto-conical interbody spinal fusion implants
CN1128944A (en) 1988-06-13 1996-08-14 卡林技术公司 Apparatus and method of inserting spinal implants
DE8808701U1 (en) * 1988-07-04 1989-08-03 Mecron Medizinische Produkte Gmbh, 1000 Berlin, De
SE9304281D0 (en) * 1993-12-23 1993-12-23 Astra Ab Cup
DE19520468C1 (en) * 1995-06-03 1996-11-28 Werner Scholz Artificial hip joint socket
SE9700300D0 (en) 1997-01-31 1997-01-31 Astra Ab Reamer
FR2770769B1 (en) * 1997-11-07 2000-02-18 Orthotechnique acetabular component
DE19802215C1 (en) * 1998-01-22 2000-04-20 Martin Imhof An orthopedic bone implant
DE10106863C2 (en) * 2001-02-14 2003-04-03 Hans Ulrich Staeubli Implantable pan for hip endoprosthesis
FR2950525B1 (en) 2009-09-28 2013-05-10 Thomas Gradel Hip prothetic cotyl with external fastening
FR2961387B1 (en) 2010-06-17 2013-06-07 Thomas Gradel Ceramic cotyl with external fastening
EP2990013B1 (en) 2014-09-01 2017-06-21 Jossi Holding AG Artificial articulated shell
FR3048356A1 (en) * 2016-03-01 2017-09-08 T O Cotyloid element of hip prosthesis, comprising reliefs of aid for impaction

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH568753A5 (en) * 1973-08-31 1975-11-14 Oscobal Ag
DE2645101A1 (en) * 1976-10-04 1978-04-06 Staatliche Porzellan Manufaktu Hip prosthesis with cup-shaped ball socket - with self-tapping thread interrupted by upwards tapering free grooves

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