DE9416881U1 - Endoprosthesis for insertion into the body to replace a joint, in particular a hip or knee joint - Google Patents
Endoprosthesis for insertion into the body to replace a joint, in particular a hip or knee jointInfo
- Publication number
- DE9416881U1 DE9416881U1 DE9416881U DE9416881U DE9416881U1 DE 9416881 U1 DE9416881 U1 DE 9416881U1 DE 9416881 U DE9416881 U DE 9416881U DE 9416881 U DE9416881 U DE 9416881U DE 9416881 U1 DE9416881 U1 DE 9416881U1
- Authority
- DE
- Germany
- Prior art keywords
- base body
- projections
- knife
- bone
- joint
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 210000004394 hip joint Anatomy 0.000 title claims description 8
- 238000003780 insertion Methods 0.000 title claims description 6
- 230000037431 insertion Effects 0.000 title claims description 6
- 210000000629 knee joint Anatomy 0.000 title claims description 6
- 210000000988 bone and bone Anatomy 0.000 claims description 20
- 239000007943 implant Substances 0.000 description 5
- 239000004568 cement Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 210000002808 connective tissue Anatomy 0.000 description 1
- 210000001981 hip bone Anatomy 0.000 description 1
- 229910052588 hydroxylapatite Inorganic materials 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- XYJRXVWERLGGKC-UHFFFAOYSA-D pentacalcium;hydroxide;triphosphate Chemical compound [OH-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O XYJRXVWERLGGKC-UHFFFAOYSA-D 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/38—Joints for elbows or knees
- A61F2/3859—Femoral components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
- A61F2/367—Proximal or metaphyseal parts of shafts
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30108—Shapes
- A61F2002/3011—Cross-sections or two-dimensional shapes
- A61F2002/30138—Convex polygonal shapes
- A61F2002/30156—Convex polygonal shapes triangular
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
- A61F2002/30845—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes with cutting edges
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
- A61F2002/30884—Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
- A61F2002/3403—Polar aperture
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3412—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface
- A61F2002/3417—Acetabular cups with pins or protrusions, e.g. non-sharp pins or protrusions projecting from a shell surface the outer shell having protrusions on meridian lines, e.g. equidistant fins or wings around the equatorial zone
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3453—Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped
- A61F2002/3456—Acetabular cups having a non-hemispherical convex outer surface, e.g. quadric-shaped ellipsoidal or having a flattened polar region
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
- A61F2002/365—Connections of heads to necks
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2220/0033—Connections 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
- A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
- A61F2230/0017—Angular shapes
- A61F2230/0023—Angular shapes triangular
Landscapes
- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Cardiology (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Transplantation (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physical Education & Sports Medicine (AREA)
- Prostheses (AREA)
Description
Endoprothese zur Einbringung in den Körper zum Ersatz eines Gelenks, insbesondere eines Hüft- oder KniegelenksEndoprosthesis for insertion into the body to replace a joint, in particular a hip or knee joint
Die Erfindung betrifft eine Endoprothese der im Oberbegriff des Anspruchs 1 genannten Art.The invention relates to an endoprosthesis of the type mentioned in the preamble of claim 1.
Eine bekannte Hüftgelenkprothese der betreffenden Art weist einen Grundkörper auf, der langgestreckt ist und über seine überwiegende Länge in einen entsprechenden Hohlraum eines Röhrenknochens eingesetzt wird, während sein herausragendes Ende einen Konus aufweist, der zur Halterung einer Kugel dient. Die Kugel bewegt sich im implantierten Zustand in einer Lagerpfanne eines in den Hüftknochen eingesetzten Lagerteils.A known hip joint prosthesis of the type in question has a base body that is elongated and is inserted over most of its length into a corresponding cavity in a long bone, while its protruding end has a cone that serves to hold a ball. When implanted, the ball moves in a bearing socket of a bearing part inserted into the hip bone.
Zur Vermeidung von Relativbewegungen des langgestreckten Grundkörpers ist es bekannt, diesen Grundkörper mit Zement einzusetzen. Das ist aufwendig und hat den Nachteil, daß sich der Grundkörper zum Zwecke einer Auswechslung nur schwer aus dem umgebenden Knochengewebe, mit dem inzwischen eine Verwachsung stattgefunden hat, lösen läßt.In order to avoid relative movements of the elongated base body, it is known to insert this base body with cement. This is complex and has the disadvantage that the base body is difficult to separate from the surrounding bone tissue, with which it has since grown together, in order to replace it.
Es ist daher grundsätzlich erwünscht, den Grundkörper zementlos zu implantieren. Dabei besteht jedoch grundsätzlich die Gefahr, daß sich zwischen Prothese und Knochen eine bindegewebige Zwischenschicht bildet, welche dann Folge von Relativbewegungen ist.It is therefore generally desirable to implant the base body without cement. However, there is always the risk that an intermediate layer of connective tissue will form between the prosthesis and the bone, which is then the result of relative movements.
Der Erfindung liegt die Aufgabe zugrunde, eine Endoprothese zur Einbringung in den Körper zum Ersatz eines GelenksThe invention is based on the object of providing an endoprosthesis for insertion into the body to replace a joint
9 · 9 ·
zu schaffen, die zementlos implantierbar ist und bei der die Gefahr von Relativbewegungen zwischen Prothese und Knochen verringert ist.which can be implanted without cement and in which the risk of relative movements between the prosthesis and the bone is reduced.
Die der Erfindung zugrundeliegende Aufgabe wird durch die im Kennzeichen des Anspruchs 1 angegebene Lehre gelöst.The problem underlying the invention is solved by the teaching specified in the characterizing part of claim 1.
Der Grundgedanke dieser Lehre besteht darin, an dem Grundkörper messerartige Vorsprünge vorzusehen, die nicht nur in die Spongiosa, sondern auch in die innere Corticalis einschneiden und so eine Abstützung des Grundkörpers der Endoprothese an den festeren Teilen des Knochengewebes bewirken. Gleichzeitig ergibt sich der Vorteil, daß die messerartigen Vorsprünge eine Vergrößerung der Gesamtoberfläche bewirken, die ein großflächiges Anwachsen von Knochen ermöglicht. Dabei können in bekannter Weise die messerartigen Vorsprünge zur Verbesserung des Anwachsverhaltens aufgerauht oder beschichtet sein, beispielsweise mit Hydroxilapatit. Da die messerartigen Vorsprünge keine formschlüssige Einbettung zur Folge haben, wie das beispielsweise bei einem Einzementieren, der Fall ist, läßt sich ein derartiges Implantat später zum Zwecke des Auswechselns leichter lösen und entfernen.The basic idea behind this teaching is to provide knife-like projections on the base body that not only cut into the spongiosa, but also into the inner cortex, thus supporting the base body of the endoprosthesis on the firmer parts of the bone tissue. At the same time, there is the advantage that the knife-like projections increase the overall surface area, which enables bone to grow over a large area. The knife-like projections can be roughened or coated in a known manner to improve the growth behavior, for example with hydroxylapatite. Since the knife-like projections do not result in a form-fitting embedding, as is the case with cementing, such an implant can be loosened and removed more easily later for the purpose of replacement.
Eine Weiterbildung der Erfindung besteht darin, daß der Grundkörper im wesentlichen rund ist und daß sich die messerartigen Vorsprünge sternförmig von dem Grundkörper weg erstrecken. Diese Ausführungsform läßt sich besonders einfach fertigen, insbesondere gemäß einer Weiterbildung dieser Ausführungsform, bei der der Grundkörper im wesentlichen halbkugelförmig ist. Diese Ausführungsform ist besonders geeignet für die Ausbildung einer Gelenkpfanne eines Hüftgelenks. A further development of the invention consists in that the base body is essentially round and that the knife-like projections extend in a star shape away from the base body. This embodiment is particularly easy to manufacture, in particular according to a further development of this embodiment in which the base body is essentially hemispherical. This embodiment is particularly suitable for the formation of a joint socket of a hip joint.
Eine andere Weiterbildung dieser Ausführungsform besteht darin, daß die scharfen Kanten jeweils bogenförmig, vorzugsweise kreisbogenförmig verlaufen. Auch diese Ausführungsform läßt sich besonders einfach fertigen. Eine andere Ausführungsform der Erfindung besteht darin, daß der Grund-Another development of this embodiment consists in that the sharp edges are each curved, preferably circular. This embodiment is also particularly easy to manufacture. Another embodiment of the invention consists in that the base
körper langgestreckt ist, so daß die messerartigen Vorsprünge die Form von Rippen haben, die parallel zueinander und in Richtung der Längsausdehnung des Grundkörpers verlaufen. Dieser Grundkörper, der Teil einer Hüftgelenkprothese ist, läßt sich dann in einen entsprechend vorbereiteten Hohlraum des Oberschenkelknochens einsetzen, wobei sich die Rippen mit ihren scharfen Außenkanten je nach Bemessung nicht nur in die Spongiosa, sondern auch in die innere Corticalis einschneiden. body is elongated so that the knife-like projections have the shape of ribs that run parallel to each other and in the direction of the longitudinal extension of the base body. This base body, which is part of a hip joint prosthesis, can then be inserted into a suitably prepared cavity in the femur, whereby the ribs with their sharp outer edges cut not only into the spongiosa, but also into the inner corticalis, depending on the dimensions.
Eine Ausführungsform der Erfindung besteht darin, daß der Grundkörper bogenförmig ist, auf seiner Außenseite die Gleitfläche und auf seiner Innenseite die messerartigen Vorsprünge aufweist. Der Grundkörper ist somit Teil eines Kniegelenks. Die messerartigen Vorsprünge sind dabei zweckmäßigerweise in zwei Ebenen angeordnet, die im Abstand und parallel zueinander verlaufen und den bogenförmigen Grundkörper im wesentlichen senkrecht schneiden.One embodiment of the invention consists in that the base body is curved, has the sliding surface on its outside and the knife-like projections on its inside. The base body is thus part of a knee joint. The knife-like projections are expediently arranged in two planes that run at a distance and parallel to one another and cut the curved base body essentially perpendicularly.
Anhand der Zeichnung soll die Erfindung an einem Ausführungsbeispiel näher erläutert werden. 20The invention will be explained in more detail using an exemplary embodiment in the drawing. 20
Fig. 1 zeigt einen Schnitt I-I gemäß Fig. 2 durchFig. 1 shows a section I-I according to Fig. 2 through
eine Gelenkpfanne für ein Hüftgelenk, Fig. 2 ist eine Axialansicht von oben in Fig. 1, Fig. 3 zeigt ein Ausführungsbeispiel der Erfindung für die Halterung einer Kugel eines Hüftgelenks in einer ersten Ansicht, Fig. 4 zeigt das Ausführungsbeispiel gemäß Fig. 3 ina joint socket for a hip joint, Fig. 2 is an axial view from above in Fig. 1, Fig. 3 shows an embodiment of the invention for holding a ball of a hip joint in a first view, Fig. 4 shows the embodiment according to Fig. 3 in
der Zeichnung von links,the drawing from the left,
Fig. 5 zeigt ein drittes Ausführungsbeispiel in Verbindung mit einem Kniegelenk, aufgesetzt aufFig. 5 shows a third embodiment in connection with a knee joint, mounted on
einen Knochen,a bone,
Fig. 6 zeigt das Implantat gemäß Fig.5 in perspektivischer Darstellung undFig. 6 shows the implant according to Fig. 5 in perspective view and
Fig. 7 ist eine perspektivische Darstellung von Fig. 6 in einer 90° verdrehten Lage.Fig. 7 is a perspective view of Fig. 6 rotated by 90°.
Das in Fig. 1 und 2 gezeigte Ausführungsbeispiel weist einen halbkugelförmigen Grundkörper 1 mit einer kalottenförmigen Lagerschale 2 auf. Von dem Grundkörper 1 stehen im wesentlichen sternförmig messerartige Vorsprünge 3 ab, die sektorförmig ausgebildet sind und mit ihren scharfen Kanten 4 in Implantationsrichtung weisen, also in Fig. 1 nach unten. The embodiment shown in Fig. 1 and 2 has a hemispherical base body 1 with a dome-shaped bearing shell 2. Protruding from the base body 1 are essentially star-shaped, knife-like projections 3, which are sector-shaped and point with their sharp edges 4 in the implantation direction, i.e. downwards in Fig. 1.
Fig. 1 ist ein Schnitt I-I durch Fig. 2, in der deutlich die sternförmige Ausrichtung der Vorsprünge 3 zu erkennen ist.Fig. 1 is a section I-I through Fig. 2, in which the star-shaped alignment of the projections 3 can be clearly seen.
Bei der Implantation der Endoprothese gemäß den Fig. 1 und 2 wird in den Knochen, in dem eine Gelenkpfanne hergestellt werden soll, eine kugelförmige Ausfräsung entsprechend der äußeren Kontur des Grundkörpers 1 erzeugt. Danach wird das Implantat eingedrückt oder eingeschlagen, wobei sich die messerartigen Vorsprünge 3 mit ihren scharfen Kanten 4 in das benachbarte Knochengewebe eingraben und so den Grundkörper 1 gegen Bewegungen, insbesondere auch gegen Drehbewegungen,, sichern. An die Vorsprünge 3 wächst Knochengewebe an, wodurch die Halterung des Implantats verbessert wird.When implanting the endoprosthesis according to Fig. 1 and 2, a spherical recess corresponding to the outer contour of the base body 1 is created in the bone in which a joint socket is to be made. The implant is then pressed or hammered in, whereby the knife-like projections 3 with their sharp edges 4 dig into the adjacent bone tissue and thus secure the base body 1 against movements, in particular against rotational movements. Bone tissue grows onto the projections 3, which improves the holding of the implant.
Fig. 3 und 4 zeigen in zwei 90° zueinander verdrehten Darstellungen ein Ausführungsbeispiel einer Endoprothese gemäß der Erfindung zur Halterung einer Kugel 5 an einem nicht dargestellten Röhrenknochen. Die Kugel 5 greift im Ergebnis in eine Lagerschale 2 eines Grundkörpers 1 gemäß Fig. 1 und 2 ein, wobei allerdings die Darstellung in den Fig. 3 und 4 gegenüber der gemäß den Fig. 1 und 2 verkleinert ist. Die Kugel 5 sitzt fest auf einem Konus 6 an einem Ende eines Grundkörpers 7, der so geformt ist, daß er in einen vorbereiteten Hohlraum eines Röhrenknochens einsetzbar ist. An dem Grundkörper 7 befinden sich Rippen 8, die nach außen hin scharfe Kanten 9 haben und in Einsetzrichtung spitz zu- und auslaufen. Beim Einbringen des Grundkörpers 7 in einen komplementär dazu erzeugten Hohlraum in einem Roh-Fig. 3 and 4 show, in two representations rotated by 90° to one another, an embodiment of an endoprosthesis according to the invention for holding a ball 5 on a tubular bone (not shown). The ball 5 engages as a result in a bearing shell 2 of a base body 1 according to Fig. 1 and 2, although the representation in Fig. 3 and 4 is reduced in size compared to that according to Fig. 1 and 2. The ball 5 sits firmly on a cone 6 at one end of a base body 7, which is shaped in such a way that it can be inserted into a prepared cavity in a tubular bone. Ribs 8 are located on the base body 7, which have sharp edges 9 on the outside and taper to a point in the direction of insertion. When the base body 7 is inserted into a cavity created in a complementary manner in a raw
renknochen graben sich die Rippen 6 in die festeren Bereiche des Knochens ein, wodurch der Grundkörper 7 fest insbesondere auch gegen Drehbewegungen gehalten ist.In the case of renal bones, the ribs 6 dig into the firmer areas of the bone, whereby the base body 7 is held firmly, in particular also against rotational movements.
Fig. 6 zeigt ein weiteres Ausführungsbeispiel einer Endoprothese gemäß der Erfindung mit einem Grundkörper 10, der bogenförmig ausgebildet ist und das Ende eines Knochens 11 umgreift. Auf der Außenseite bildet der Grundkörper 10 eine Gleitfläche für ein Kniegelenk, während auf seiner Innenseite messerartige Vorsprünge 12 vorgesehen sind, die bei dem Aufsetzen des Grundkörpers 10 schneidenförmig in den Knochen 11 eingedrungen sind.Fig. 6 shows a further embodiment of an endoprosthesis according to the invention with a base body 10, which is curved and surrounds the end of a bone 11. On the outside, the base body 10 forms a sliding surface for a knee joint, while on its inside knife-like projections 12 are provided, which penetrate into the bone 11 in a cutting manner when the base body 10 is placed on it.
Fig. 6 zeigt den Grundkörper 10 mit seinen Vorsprüngen 12, die gegenüber der Ausführungsform gemäß Fig. 5 etwas abgewandelt sind, in perspektivischer Darstellung. Es ist zu erkennen, daß zwei Gruppen von Vorsprüngen 12 und 13 vorgesehen sind, die in zwei Ebenen angeordnet sind, die im Abstand und parallel zueinander verlaufen und den bogenförmigen Grundkörper 10 im wesentlichen senkrecht schneiden.Fig. 6 shows the base body 10 with its projections 12, which are slightly modified compared to the embodiment according to Fig. 5, in a perspective view. It can be seen that two groups of projections 12 and 13 are provided, which are arranged in two planes that run at a distance and parallel to one another and cut the arched base body 10 essentially perpendicularly.
Fig. 7 zeigt in perspektivischer Darstellung die Ausführungsform gemäß Fig. 6 in einer Ansicht von rechts in Fig. 6.Fig. 7 shows a perspective view of the embodiment according to Fig. 6 in a view from the right in Fig. 6.
Claims (7)
5the base body (7) is elongated and that the knife-like projections have the shape of ribs (8) which run parallel to each other and in the direction of the longitudinal extension of the base body (7).
5
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9416881U DE9416881U1 (en) | 1994-10-20 | 1994-10-20 | Endoprosthesis for insertion into the body to replace a joint, in particular a hip or knee joint |
| DE4437479A DE4437479A1 (en) | 1994-10-20 | 1994-10-20 | Endoprosthesis for hip or knee joint |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9416881U DE9416881U1 (en) | 1994-10-20 | 1994-10-20 | Endoprosthesis for insertion into the body to replace a joint, in particular a hip or knee joint |
| DE4437479A DE4437479A1 (en) | 1994-10-20 | 1994-10-20 | Endoprosthesis for hip or knee joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE9416881U1 true DE9416881U1 (en) | 1994-12-08 |
Family
ID=25941213
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4437479A Withdrawn DE4437479A1 (en) | 1994-10-20 | 1994-10-20 | Endoprosthesis for hip or knee joint |
| DE9416881U Expired - Lifetime DE9416881U1 (en) | 1994-10-20 | 1994-10-20 | Endoprosthesis for insertion into the body to replace a joint, in particular a hip or knee joint |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE4437479A Withdrawn DE4437479A1 (en) | 1994-10-20 | 1994-10-20 | Endoprosthesis for hip or knee joint |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE4437479A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0728449A2 (en) * | 1995-02-22 | 1996-08-28 | Francesco Caracciolo | Anatomic hip prosthesis |
| EP0761183A2 (en) * | 1995-08-25 | 1997-03-12 | Bristol-Myers Squibb Company | Prosthetic implant with fins |
| US20160235543A1 (en) * | 2015-02-13 | 2016-08-18 | Su-Yang Hwa | Knee joint prosthesis and tibial component and femoral component thereof |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19730073C1 (en) * | 1997-07-14 | 1999-07-15 | Jansson Volkmar Priv Doz Dr Me | Endoprosthesis system |
| GB2351671B (en) * | 1999-07-02 | 2004-02-25 | Bridgehall Consultants Ltd | Hip prosthesis with femoral component and corresponding cotyloid element with high implantation adaptability |
| FR2796266B1 (en) * | 1999-07-13 | 2001-08-10 | Merck Biomaterial France | COTYL FOR HIP PROSTHESIS |
| GB0027210D0 (en) | 2000-11-07 | 2000-12-27 | Benoist Girard & Cie | Prosthesis bearing component |
| GB0027211D0 (en) * | 2000-11-07 | 2000-12-27 | Benoist Girard & Cie | Cementless prosthesis bearing element |
| WO2004105654A1 (en) * | 2003-05-29 | 2004-12-09 | Curradini Giorgio E | Femoral stem for hip prosthesis with macrostructures improvement |
| EP1626683B1 (en) * | 2003-05-29 | 2009-11-18 | Giorgio Curradini | Femoral stem for hip prosthesis |
| FR2868689B1 (en) * | 2004-04-09 | 2007-02-16 | Ct Pulse France Sa Sa | FEMALE ROD FOR HIP PROSTHESIS |
| FR2877563B1 (en) * | 2004-11-08 | 2007-11-30 | Centre Nat Rech Scient Cnrse | ACETABULAR PROSTHESIS FOR FIXING WITHOUT CEMENT |
| EP2561832B1 (en) | 2008-10-07 | 2015-10-21 | Finsbury (Development) Limited | Prosthesis |
| WO2010040905A1 (en) * | 2008-10-09 | 2010-04-15 | Patrick Hechard | Prosthesis part that can be implanted on a resected end of a bone, and method for implantation thereof |
| DE102010002322B4 (en) * | 2010-02-25 | 2013-03-07 | Merete Medical Gmbh | Thigh part of a hip joint prosthesis and hip joint prosthesis |
| DE102020116929A1 (en) | 2020-06-26 | 2021-12-30 | Universität Rostock | Endoprosthesis, method for the production thereof and use of an endoprosthesis |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8127991U1 (en) * | 1982-09-02 | Künne, Hermann, Dr. med., 4783 Erwitte | Cementless total hip replacement | |
| DE8212689U1 (en) * | 1982-08-12 | Howmedica International, Inc. Zweigniederlassung Kiel, 2300 Kiel | Hip joint prosthesis | |
| DE8409993U1 (en) * | 1984-07-19 | Mecron Medizinische Produkte Gmbh, 1000 Berlin | Prosthesis socket | |
| SU532377A2 (en) * | 1972-07-17 | 1976-10-25 | Центральный Научно-Исследовательский Институт Травматологии И Ортопедии Имени Н.Н.Приорова | Artificial knee joint of the CMSivasha system |
| FR2478462A1 (en) * | 1980-03-19 | 1981-09-25 | Judet Robert | Artificial joint component securing system - uses parallel lugs pressed into holes previously bored in bone with openings in lugs for osseous invasion |
| SU925336A1 (en) * | 1980-04-03 | 1982-05-07 | Центральный Ордена Трудового Красного Знамени Научно-Исследовательский Институт Травматологии И Ортопедии Им.Н.Н.Приорова | Hip joint endoprosthesis |
| FR2519545A1 (en) * | 1982-01-13 | 1983-07-18 | Cuilleron J | Hip joint prosthesis implanted without cement or circlips - anchors acetabulum and mating femur head with bone-penetrating spikes |
| DE8237288U1 (en) * | 1982-05-03 | 1985-09-12 | Waldemar Link Gmbh & Co, 2000 Hamburg | Femoral hip joint prosthesis |
| US4659331A (en) * | 1983-11-28 | 1987-04-21 | Regents Of University Of Michigan | Prosthesis interface surface and method of implanting |
| DE3535158A1 (en) * | 1985-10-02 | 1987-04-09 | Gmt Medizinische Technik Gmbh | SADDLE PROSTHESIS |
| CH669903A5 (en) * | 1986-04-15 | 1989-04-28 | Sulzer Ag | |
| SU1457922A1 (en) * | 1987-02-02 | 1989-02-15 | Пензенский государственный институт усовершенствования врачей | Endoprosthesis for hip joint |
| SU1457923A1 (en) * | 1987-02-02 | 1989-02-15 | Пензенский государственный институт усовершенствования врачей | Endoprosthesis for hip joint |
| CH675826A5 (en) * | 1988-08-24 | 1990-11-15 | Sulzer Ag | |
| DE3901885A1 (en) * | 1989-01-23 | 1990-08-02 | Werner Prof Dr Med Sattel | PAN FOR A JOINT OPROTHESIS |
| SU1678359A1 (en) * | 1989-10-23 | 1991-09-23 | Предприятие П/Я А-3903 | Cotyloid cavity prosthesis |
| DE9014542U1 (en) * | 1990-10-20 | 1991-01-03 | Howmedica GmbH, 2314 Schönkirchen | Shell element for receiving a joint endoprosthesis |
| DE4135310A1 (en) * | 1991-10-25 | 1993-04-29 | Habermeyer Peter | CEMENT-FREE ENDOPROTHESIS |
| GB9201477D0 (en) * | 1992-01-23 | 1992-03-11 | Howmedica | Acetabular cup for a total hip prosthesis and total hip prosthesis embodying such cups |
| DE4215888A1 (en) * | 1992-05-14 | 1993-11-18 | Bodo Gnutzmann | Acetabulum for high joint prosthesis - has shell-shaped cap with several apertures for anchoring elements with outer anchoring set |
| DE4315143C1 (en) * | 1993-05-07 | 1994-12-08 | S & G Implants Gmbh | Thigh part of a hip joint endoprosthesis |
-
1994
- 1994-10-20 DE DE4437479A patent/DE4437479A1/en not_active Withdrawn
- 1994-10-20 DE DE9416881U patent/DE9416881U1/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0728449A2 (en) * | 1995-02-22 | 1996-08-28 | Francesco Caracciolo | Anatomic hip prosthesis |
| EP0728449A3 (en) * | 1995-02-22 | 1998-04-22 | Francesco Caracciolo | Anatomic hip prosthesis |
| EP0761183A2 (en) * | 1995-08-25 | 1997-03-12 | Bristol-Myers Squibb Company | Prosthetic implant with fins |
| EP0761183A3 (en) * | 1995-08-25 | 1998-01-07 | Bristol-Myers Squibb Company | Prosthetic implant with fins |
| US20160235543A1 (en) * | 2015-02-13 | 2016-08-18 | Su-Yang Hwa | Knee joint prosthesis and tibial component and femoral component thereof |
| US11432932B2 (en) | 2015-02-13 | 2022-09-06 | Su-Yang Hwa | Knee joint prosthesis and tibial component thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4437479A1 (en) | 1996-05-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE19928709B4 (en) | Hip endoprosthesis | |
| DE3015669C2 (en) | Insert body for surgically created recesses in long bones | |
| DE60107882T2 (en) | Shoulder endoprosthesis for fractures of the upper end of the humerus | |
| DE60315037T2 (en) | Expandable intervertebral fusion cage | |
| DE10045158C2 (en) | Adjustable prosthesis for replacement and reconstruction of ossicles | |
| DE10103482C2 (en) | expandable socket | |
| DE68902318T2 (en) | HIP PROSTHESIS WITH DISCONNECTED DISTAL TIP. | |
| DE9416881U1 (en) | Endoprosthesis for insertion into the body to replace a joint, in particular a hip or knee joint | |
| DE2638134A1 (en) | FINGER JOINT IMPLANT | |
| EP0684024A2 (en) | Joint prosthesis | |
| DE2830354A1 (en) | JOINT ENDOPROTHESIS | |
| DE2701099A1 (en) | SHOULDER PROSTHESIS | |
| DE3431645A1 (en) | ENDOPROTHESIS | |
| DE2314708B2 (en) | Joint socket for an artificial hip joint | |
| EP1632200A1 (en) | Carpometacarpal thumb joint prosthesis | |
| WO2006099886A1 (en) | Kit for producing a great toe metatarsophalangeal joint | |
| DE3205577A1 (en) | Bone prosthesis | |
| EP0402810A1 (en) | Implantation set | |
| DE3336005A1 (en) | Endoprosthesis, especially tumour prosthesis | |
| DE69200772T2 (en) | Expandable acetabular cup. | |
| DE8703465U1 (en) | Hip joint endoprosthesis | |
| DE10061975C2 (en) | Intervertebral disc replacement implant part | |
| DE19532898A1 (en) | Artificial acetabular cup for hip joint | |
| DE19606057C2 (en) | Metallic molded part for a bone implant | |
| DE69401301T2 (en) | Femoral part of a hip prosthesis |