DE4220462C1 - Hip-joint prosthesis socket - Google Patents

Hip-joint prosthesis socket

Info

Publication number
DE4220462C1
DE4220462C1 DE4220462A DE4220462A DE4220462C1 DE 4220462 C1 DE4220462 C1 DE 4220462C1 DE 4220462 A DE4220462 A DE 4220462A DE 4220462 A DE4220462 A DE 4220462A DE 4220462 C1 DE4220462 C1 DE 4220462C1
Authority
DE
Germany
Prior art keywords
inner shell
outer shell
pan according
shell
shock absorbing
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
DE4220462A
Other languages
German (de)
Inventor
Harald Dr Med Eckhardt
Martin Dipl Ing Schug
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.)
S&G Implants GmbH
Original Assignee
S&G Implants GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by S&G Implants GmbH filed Critical S&G Implants GmbH
Priority to DE4220462A priority Critical patent/DE4220462C1/en
Application granted granted Critical
Publication of DE4220462C1 publication Critical patent/DE4220462C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30907—Nets or sleeves applied to surface of prostheses or in cement
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/30199—Three-dimensional shapes
    • A61F2002/302—Three-dimensional shapes toroidal, e.g. rings
    • 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
    • A61F2002/30362—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 with possibility of relative movement between the protrusion and the recess
    • A61F2002/30364—Rotation about the common longitudinal axis
    • A61F2002/30367—Rotation about the common longitudinal axis with additional means for preventing said rotation
    • 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
    • A61F2002/30405—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by screwing complementary threads machined on the parts themselves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30495—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism using a locking ring
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30563—Special structural features of bone or joint prostheses not otherwise provided for having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
    • 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
    • A61F2002/3092—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth having an open-celled or open-pored structure
    • 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
    • A61F2002/3241—Joints for the hip having a ring, e.g. for locking the femoral head into the acetabular cup
    • 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
    • A61F2002/3414—Polar protrusion, e.g. for centering two concentric shells
    • 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
    • A61F2002/3445—Acetabular cups having a number of shells different from two
    • A61F2002/3448—Multiple cups made of three or more concentric shells fitted or nested into one another
    • 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
    • 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
    • A61F2230/0063—Three-dimensional shapes
    • A61F2230/0065—Three-dimensional shapes toroidal, e.g. ring-shaped, doughnut-shaped

Abstract

A socket for a hip-joint endo-prosthesis has a metallic outer shell with a plastic insert and with a shock-absorbing medium between the outer shell and the insert. The novelty is that the insert is lined with a metallic inner shell and the shock-absorbing medium is located between the inner and outer shells. Pref. the shock-absorbing medium comprises silicone balls.

Description

Die Erfindung betrifft eine Pfanne für eine Hüftgelenk- Endoprothese, mit einer metallischen Außenschale, einem Einsatz aus Kunststoffmaterial in der Außenschale und mit Stoßdämpfungsmitteln zwischen der Außenschale und dem Einsatz.The invention relates to a pan for a hip joint Endoprosthesis, with a metallic outer shell, one Insert made of plastic material in the outer shell and with shock absorbing means between the outer shell and use.

Eine derartige prothetische Pfanne ist beispielsweise aus der EP 0 066 092 A1/B1 bekannt, bei der die Stoßdämpfungs­ mittel aus einer elastischen Materialschicht bestehen, die zwischen der Außenschale und dem Einsatz aus Kunst­ stoffmaterial zwischengefügt ist. Da der Einsatz über die elastische Materialschicht beweglich in der Außen­ schale gelagert ist, unterliegt der Einsatz bei der starken Langzeitbeanspruchung einer unerwünschten Ver­ formung und Abnutzung, und durch die Verformung des Ein­ satzes wird auch die gleichmäßige Stoßdämpfungseigen­ schaft der gesamten Pfanne reduziert.Such a prosthetic cup is for example known from EP 0 066 092 A1 / B1, in which the shock absorption consist of an elastic layer of material, between the outer shell and the insert made of art material is interposed. Because the use over the elastic material layer is movable on the outside is stored, is subject to use by strong long-term use of an undesirable ver  shaping and wear, and by deforming the one the even shock absorption properties shaft of the entire pan is reduced.

Aus der EP 0 444 382 A1 ist eine künstliche stoßge­ dämpfte Hüftgelenkpfanne mit einer Außenschale und einer Innenschale bekannt, zwischen denen elastische Übertragungselemente in einem Hohlraum angeordnet sind. Aufgrund einer großen Wandstärke bildet die Innenschale eine steife Referenz für die elastischen Elemente der Pfanne und für den Kugelkopf des künst­ lichen Hüftgelenks. Verformungen der aus Kunststoff bestehenden relativ dicken Innenschale und die damit einhergehenden Änderungen der Stoßdämpfereigenschaften lassen sich jedoch bei längerer Benutzung nicht ausschließen.EP 0 444 382 A1 describes an artificial shock steamed acetabular cup with an outer shell and an inner shell known, between which elastic Transmission elements arranged in a cavity are. Due to a large wall thickness, the Inner shell a stiff reference for the elastic Elements of the pan and for the ball head of the art hip joint. Deformation of the plastic existing relatively thick inner shell and the so allow accompanying changes in shock absorber properties however, they are not mutually exclusive with long-term use.

Aufgabe der Erfindung ist es daher, eine Pfanne der ein­ gangs genannten Art derart weiterzubilden, daß der Pfanneneinsatz auch während längerer Benutzung möglichst formstabil bleibt und die Stoßdämpfungseigenschaften keine Verschlechterung erfahren.The object of the invention is therefore a pan of a gangs mentioned in such a way that the Use of pans as long as possible remains dimensionally stable and the shock absorption properties experienced no deterioration.

Diese Aufgabe wird bei der Pfanne der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß der Einsatz von einer metallischen Innenschale ummantelt ist, und daß die Stoßdämpfungsmittel zwischen der Innenschale und der Außenschale angeordnet sind.This task is the pan of the above Art solved according to the invention in that the use of is encased in a metallic inner shell, and that the shock absorbing means between the inner shell and the Outer shell are arranged.

Die Vorteile der Erfindung liegen insbesondere darin, daß der Einsatz von einer metallischen Innenschale um­ mantelt ist, so daß die Außenkontur des Einsatzes auch bei Langzeitgebrauch unverändert bleibt, und eine Ver­ formung des Einsatzes entsprechend begrenzt ist. Die Stoßdämpfungsmittel sind in dem Zwischenraum zwischen Außenschale und Innenschale angeordnet, und da sowohl Außenschale als auch Innenschale aus Metall bestehen, erfährt der für die Stoßdämpfungsmittel vorgesehene Zwischenraum keine Formveränderungen, so daß auf die Stoßdämpfungsmittel auch nach längerem Gebrauch eine ausreichend verteilte Belastung einwirkt, so daß die gewünschte Wirkung der Stoßdämpfungsmittel keine Ein­ buße durch Formänderungen erfährt. Insgesamt wird da­ durch eine prothetische Pfanne verwirklicht, welche bei geringer Abnutzung des Kunststoffeinsatzes gleichblei­ bende Stoßdämpfungseigenschaften aufweist. The advantages of the invention are in particular that the use of a metallic inner shell around is covered so that the outer contour of the insert too remains unchanged for long-term use, and a ver Formation of the insert is limited accordingly. The Shock absorbing means are in the space between Outer shell and inner shell arranged, and there both Outer shell and inner shell are made of metal,  experiences the intended for the shock absorbing means Gap no changes in shape, so that on the Shock absorber even after prolonged use sufficiently distributed load acts so that the desired effect of the shock absorbing means no on repented by changes in shape. Overall there will be realized by a prosthetic socket, which Little wear of the plastic insert remains the same has shock absorbing properties.  

Gemäß einer bevorzugten Ausführungsform der Erfindung enthalten die Stoßdämpfungsmittel eine Schicht aus elastischem Material, z. B. eine Silikonmatte, die ge­ schlossen oder mit Perforationen versehen sein kann und eine flächige Anlage der Innenschale an die Außen­ schale ermöglicht. Alternativ lassen sich die Stoß­ dämpfungsmittel auch so ausbilden, daß eine Abstützung der Innenschale an mehreren vorgegebenen Stellen lokal gegen die Außenschale erfolgt, wobei Bereiche mit starker Druckbeanspruchung bevorzugt verstärkte oder härtere Stoßdämpfungsmittel aufweisen können.According to a preferred embodiment of the invention the shock absorbing means contain a layer of elastic material, e.g. B. a silicone mat, the ge closed or can be provided with perforations and a flat contact of the inner shell with the outside shell allows. Alternatively, the bump Design damping means so that a support the inner shell locally at several predetermined locations against the outer shell, areas with strong compressive stress, preferably reinforced or may have harder shock absorbing agents.

Die Stoßdämpfungsmittel enthalten bei einer bevorzug­ ten Ausführungsform der Erfindung Ringe aus elasti­ schem Material, die konzentrisch zur Rotationsachse der Pfanne zwischen Innenschale und Außenschale ange­ ordnet sind. Alternativ läßt sich als Stoßdämpfungs­ mittel auch ein lineares Profilelement vorsehen, wel­ ches in gewünschter Weise abschnittweise oder zusammen­ hängend auf die Außenfläche der Innenschale aufge­ bracht, aufgewickelt oder aufgeklemmt wird, um eine gleichmäßige Bedämpfung von Stößen unterschiedlicher Richtung zu gewährleisten.The shock absorption means included in one th embodiment of the invention rings made of elastic chemical material concentric to the axis of rotation the pan between the inner shell and outer shell are arranged. Alternatively, it can be used as a shock absorber means also provide a linear profile element, wel ches in sections or together in the desired manner hanging on the outer surface of the inner shell brought, wound or pinched to a uniform damping of different impacts Ensure direction.

Die Stoßdämpfungsmittel bestehen z. B. aus Silikonma­ terial, weil dieses Material gewebeverträglich ist und ausreichende Elastizitätseigenschaften aufweist. Statt einer elastischen Schicht oder lokalen Stoß­ dämpfungselementen lassen sich bevorzugt auch Stoß­ dämpfungsmittel vorsehen, welche aus mehreren unter­ schiedlichen Materialschichten oder aus Matten und lokalen Stoßdämpfungselementen bestehen. Um den Einsatz in der Innenschale einzufassen, wird be­ vorzugt ein Spannelement, z. B. ein Gewindering, einge­ setzt, der in ein Innengewinde der Innenschale ein­ schraubbar ist und den Einsatz radial überlappend ge­ gen die Innenschale drückt. Die Einheit aus Kunststoff­ einsatz und Innenschale ist mittels mindestens eines Befestigungselements in der Außenschale verankerbar. Als Befestigungselement eignet sich ein Sprengring, der in eine Umfangsnut der Außenschale eingesetzt wird und die Innenschale und ggfs. auch den Kunststoffein­ satz radial überragt. Um eine feste Verankerung der Pfanne in dem angrenzen­ den Knochengewebe zu verwirklichen, wird bei einer besonders bevorzugten Ausführungsform der Erfindung die Außenfläche der Außenschale mindestens abschnitt­ weise mit einer offenporigen oder offenzelligen Ober­ flächenstruktur versehen, in welche das angrenzende Knochengewebe einwächst.The shock absorbing means exist, for. B. from silicone material material because this material is tissue compatible and has sufficient elastic properties. Instead of an elastic layer or local impact damping elements can preferably also be impact provide damping means, which consist of several under different layers of material or from mats and local shock absorption elements exist.  To enclose the insert in the inner shell, be preferably a tensioning element, e.g. B. a threaded ring inserts into an internal thread of the inner shell is screwable and the insert radially overlapping ge presses against the inner shell. The plastic unit insert and inner shell is by means of at least one Fastener can be anchored in the outer shell. A snap ring is suitable as a fastening element, which is inserted into a circumferential groove of the outer shell and the inner shell and possibly also the plastic Radially protrudes the block. Adjacent to a firm anchoring of the pan in the realizing the bone tissue is one particularly preferred embodiment of the invention at least cut off the outer surface of the outer shell wise with an open-pore or open-celled upper surface structure into which the adjacent Bone tissue ingrows.

Vorteilhafte Weiterbildungen der Erfindung sind durch die Merkmale der Unteransprüche gekennzeichnet.Advantageous developments of the invention are through characterized the features of the subclaims.

Im folgenden wird ein Ausführungsbeispiel anhand der Zeichnung näher erläutert.In the following, an embodiment is based on the Drawing explained in more detail.

Die Figur zeigt einen Querschnitt durch eine Pfanne mit Stoßdämpfungsmitteln.The figure shows a cross section through a pan with shock absorbers.

Die Figur zeigt einen Querschnitt durch eine Pfanne 1 für eine Hüftgelenk-Endoprothese. Die Pfanne 1 weist eine metallische Außenschale 4 auf, die auf ihrer äußeren Oberfläche eine offenporige oder offenzellige Struktur 6 besitzt. Die Außenschale 4 besitzt eine um die Rotationsachse 2 im wesentlichen rotationssymme­ trische Gestalt, z. B. die eines Kugelabschnitts. Im Innenraum der Außenschale 4 ist ein Einsatz 10 aus Kunststoffmaterial angeordnet, der eine etwa halb­ kugelförmige Ausnehmung 12 zur Aufnahme eines Gelenk­ kopfes eines prothetischen Oberschenkelteils einer Hüftprothese aufweist. Der Einsatz 10 ist von einer metallischen Innenschale 8 eng anliegend ummantelt. Zur Befestigung des Einsatzes 10 ist ein Gewindering 20 vorgesehen, der in ein Innengewinde 22 an der offenen Kante der Innenschale 8 eingeschraubt wird und den Einsatz 10 gegen die Innenschale preßt.The figure shows a cross section through a socket 1 for a hip joint endoprosthesis. The pan 1 has a metallic outer shell 4 which has an open-pore or open-cell structure 6 on its outer surface. The outer shell 4 has a substantially rotationally symmetrical shape about the axis of rotation 2 , z. B. that of a spherical section. In the interior of the outer shell 4 , an insert 10 made of plastic material is arranged, which has an approximately semi-spherical recess 12 for receiving a joint head of a prosthetic thigh part of a hip prosthesis. The insert 10 is encased by a metallic inner shell 8 in a tight fit. A threaded ring 20 is provided for fastening the insert 10, which is screwed into an internal thread 22 on the open edge of the inner shell 8 and presses the insert 10 against the inner shell.

Der Einsatz 10 und die Innenschale 8 sind ebenfalls rotationssymmetrisch um die Rotationsachse 2 ausge­ bildet und besitzen die Form von Kugelabschnitten mit gegenüber der Außenschale entsprechend reduzier­ tem Kugeldurchmesser.The insert 10 and the inner shell 8 are also formed rotationally symmetrically about the axis of rotation 2 and have the shape of spherical sections with correspondingly reduced ball diameter compared to the outer shell.

Zwischen der Innenschale 8 und der Außenschale 4 be­ findet sich ein Zwischenraum, in dem Stoßdämpfungs­ mittel 16 angeordnet sind, mittels derer die Einheit aus Innenschale 8 und Einsatz 10 gegen die Außenschale 4 abgestützt ist. Die Stoßdämpfungsmittel 16 bestehen in der dargestellten Ausführungsform aus Ringen, die konzentrisch zur Rotationsachse 2 in vorgegebenem Ab­ stand zueinander auf der Außenfläche der Innenschale 8 in entsprechenden Ringnuten 18 liegen.Between the inner shell 8 and the outer shell 4 be there is a space in which shock absorbing means 16 are arranged, by means of which the unit from the inner shell 8 and insert 10 is supported against the outer shell 4 . The shock absorbing means 16 consist in the illustrated embodiment of rings that were concentric to the axis of rotation 2 in a predetermined Ab from each other on the outer surface of the inner shell 8 are in corresponding annular grooves 18 .

Die Außenschale 4 besitzt an ihrem Scheitel eine Mehr­ kantöffnung 3, in welche ein an der Innenschale ange­ formter Mehrkant einsteckbar ist, um eine Verdrehung der Innenschale in der Außenschale zu verhindern. The outer shell 4 has at its apex a polygonal opening 3 , into which a polygon formed on the inner shell can be inserted to prevent rotation of the inner shell in the outer shell.

In geringem Abstand von der umlaufenden Kante der Außen­ schale ist eine Umfangsnut 32 eingearbeitet, in die ein Sprengring 30 einsetzbar ist, welcher radial ein­ wärtsgerichtet die Innenschale 8 und mindestens teil­ weise auch den Gewindering 20 überdeckt und auf diese Weise die Einheit aus Innenschale 8 und Einsatz 10 in der Außenschale 4 hält.At a short distance from the peripheral edge of the outer shell, a circumferential groove 32 is incorporated into which a snap ring 30 can be inserted, which radially covers the inner shell 8 and at least partially also the threaded ring 20 and in this way the unit from the inner shell 8 and Insert 10 in the outer shell 4 holds.

Die Stoßdämpfungsmittel 16 können alternativ aus einer flächigen Silikonmatte bestehen, welche zwischen Innenschale 8 und Außenschale 4 sitzt. Alternativ können die Stoßdämpfungsmittel 16 auch aus lokalen Stoßdämpfungselementen, wie z. B. Kugeln oder Schnur­ abschnitten aus Silikonmaterial bestehen.The shock absorbing means 16 can alternatively consist of a flat silicone mat which sits between the inner shell 8 and the outer shell 4 . Alternatively, the shock absorbing means 16 can also be made of local shock absorbing elements, such as. B. balls or cord sections made of silicone material.

Claims (13)

1. Pfanne für eine Hüftgelenk-Endoprothese, mit einer metallischen Außenschale, einem Einsatz aus Kunststoff­ material in der Außenschale und mit Stoßdämpfungsmitteln zwischen der Außenschale und dem Einsatz, dadurch gekennzeichnet, daß der Einsatz (10) von einer metallischen Innenschale (8) ummantelt ist, und daß die Stoßdämpfungsmittel (16) zwischen der Innenschale (8) und der Außenschale (4) angeordnet sind.1. pan for a hip joint endoprosthesis, with a metallic outer shell, an insert made of plastic material in the outer shell and with shock absorbing means between the outer shell and the insert, characterized in that the insert ( 10 ) is encased by a metallic inner shell ( 8 ) , and that the shock absorbing means ( 16 ) between the inner shell ( 8 ) and the outer shell ( 4 ) are arranged. 2. Pfanne nach Anspruch 1, dadurch gekennzeichnet, daß die Stoßdämpfungsmittel (16) eine Schicht aus elastischem Material enthalten, die flächig gegen die Innenschale (8) und die Außen­ schale (4) anliegt.2. Pan according to claim 1, characterized in that the shock absorbing means ( 16 ) contain a layer of elastic material which rests flat against the inner shell ( 8 ) and the outer shell ( 4 ). 3. Pfanne nach Anspruch 1, dadurch gekennzeichnet, daß die Stoßdämpfungsmittel (16) die Innenschale (8) an mehreren Stellen lokal ge­ gen die Außenschale (4) abstützen.3. Pan according to claim 1, characterized in that the shock absorbing means ( 16 ) support the inner shell ( 8 ) at several locations locally ge gene the outer shell ( 4 ). 4. Pfanne nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Stoßdämpfungsmittel (16) Ringe aus elastischem Material enthalten, die konzentrisch zur Rotationsachse (2) der Pfanne die Innenschale (8) gegen die Außenschale (4) abstützen.4. Pan according to claim 1, 2 or 3, characterized in that the shock absorbing means ( 16 ) contain rings of elastic material which support the inner shell ( 8 ) against the outer shell ( 4 ) concentrically to the axis of rotation ( 2 ) of the pan. 5. Pfanne nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Stoßdämpfungsmittel (16) ein lineares Profilelement enthalten, das in vorgegebener Konfiguration zwischen der Innenschale (8) und der Außenschale (4) angeordnet ist. 5. Pan according to one of the preceding claims, characterized in that the shock absorbing means ( 16 ) contain a linear profile element which is arranged in a predetermined configuration between the inner shell ( 8 ) and the outer shell ( 4 ). 6. Pfanne nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Stoßdämpfungsmittel (16) als elastische Kugeln ausgebildet sind.6. Pan according to one of the preceding claims, characterized in that the shock absorbing means ( 16 ) are designed as elastic balls. 7. Pfanne nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Stoßdämpfungsmittel (16) aus Silikon bestehen.7. Pan according to one of the preceding claims, characterized in that the shock absorbing means ( 16 ) consist of silicone. 8. Pfanne nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der Einsatz (10) mittels eines Spannelements (20) in der Innenschale (8) ein­ gespannt ist.8. Pan according to one of the preceding claims, characterized in that the insert ( 10 ) by means of a clamping element ( 20 ) in the inner shell ( 8 ) is tensioned. 9. Pfanne nach Anspruch 8, dadurch gekennzeichnet, daß das Spannelement (20) als Gewindering ausgebildet ist, der in ein Innengewinde (22) der Innenschale (8) einschraubbar ist und den Ein­ satz (10) radial überlappt und gegen die Innenschale (8) drückt.9. Pan according to claim 8, characterized in that the clamping element ( 20 ) is designed as a threaded ring which can be screwed into an internal thread ( 22 ) of the inner shell ( 8 ) and radially overlaps the set ( 10 ) and against the inner shell ( 8 ) presses. 10. Pfanne nach Anspruch 9, dadurch gekennzeichnet, daß die Innenschale (8) an ihrem Scheitel geschlossen ist und einen auswärtsgerichteten Mehrkant aufweist, der in eine entsprechende Mehrkant­ öffnung (3) der Außenschale (4) einsteckbar ist.10. Pan according to claim 9, characterized in that the inner shell ( 8 ) is closed at its apex and has an outward polygon which can be inserted into a corresponding polygonal opening ( 3 ) of the outer shell ( 4 ). 11. Pfanne nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Einheit aus Einsatz und Innenschale mittels mindestens eines Befestigungsele­ ments (30) in der Außenschale (4) verankerbar ist.11. Pan according to one of the preceding claims, characterized in that the unit consisting of insert and inner shell by means of at least one fastening element ( 30 ) can be anchored in the outer shell ( 4 ). 12. Pfanne nach Anspruch 11, dadurch gekennzeichnet, daß das Befestigungselement (30) als Sprengring ausgebildet ist, der in eine Umfangsnut (32) der Außenschale (4) lösbar einsetzbar ist und die Innenschale (8) radial überragt.12. Pan according to claim 11, characterized in that the fastening element ( 30 ) is designed as a snap ring, which is releasably insertable into a circumferential groove ( 32 ) of the outer shell ( 4 ) and projects radially beyond the inner shell ( 8 ). 13. Pfanne nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Außenschale (4) auf ihrer Außenfläche mindestens abschnittsweise eine offen­ porige oder offenzellige Oberflächenstruktur (6) auf­ weist.13. Pan according to one of the preceding claims, characterized in that the outer shell ( 4 ) on its outer surface at least in sections has an open-cell or open-cell surface structure ( 6 ).
DE4220462A 1992-06-23 1992-06-23 Hip-joint prosthesis socket Expired - Fee Related DE4220462C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4220462A DE4220462C1 (en) 1992-06-23 1992-06-23 Hip-joint prosthesis socket

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Application Number Priority Date Filing Date Title
DE4220462A DE4220462C1 (en) 1992-06-23 1992-06-23 Hip-joint prosthesis socket

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DE4220462A Expired - Fee Related DE4220462C1 (en) 1992-06-23 1992-06-23 Hip-joint prosthesis socket

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442424C1 (en) * 1994-11-29 1996-08-22 Horst Woehler Slide shell for joint endoprosthesis
EP0787470A2 (en) * 1996-02-02 1997-08-06 Bristol-Myers Squibb Company Constraining ring for a hip cup
WO2008015286A2 (en) * 2006-08-04 2008-02-07 Ceramtec Ag Insertion of vibration-damping elements in prosthetic systems for the manipulation and damping of natural frequencies
EP1971294A1 (en) * 2006-01-09 2008-09-24 Silesco Pty Ltd Implantable joint prosthesis
JP2013017761A (en) * 2011-07-14 2013-01-31 Nakashima Medical Co Ltd Artificial hip joint
EP2800540A4 (en) * 2012-01-03 2015-08-26 Biomedflex Llc Prosthetic joint assembly and joint member therefor
US9566157B2 (en) 2006-11-07 2017-02-14 Biomedflex, Llc Three-member prosthetic joint
EP3701913A1 (en) * 2019-02-27 2020-09-02 ImplanTec Deutschland GmbH Acetabular cup for a hip joint endoprosthesis

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066092A1 (en) * 1981-05-30 1982-12-08 orthoplant Endoprothetik GmbH Prosthesis cup for the acetabular socket of a hip joint
EP0444382A1 (en) * 1990-03-01 1991-09-04 SULZER Medizinaltechnik AG Cementless metallic artificial hip cup

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0066092A1 (en) * 1981-05-30 1982-12-08 orthoplant Endoprothetik GmbH Prosthesis cup for the acetabular socket of a hip joint
EP0444382A1 (en) * 1990-03-01 1991-09-04 SULZER Medizinaltechnik AG Cementless metallic artificial hip cup

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4442424C1 (en) * 1994-11-29 1996-08-22 Horst Woehler Slide shell for joint endoprosthesis
EP0787470A2 (en) * 1996-02-02 1997-08-06 Bristol-Myers Squibb Company Constraining ring for a hip cup
EP0787470A3 (en) * 1996-02-02 1998-01-07 Bristol-Myers Squibb Company Constraining ring for a hip cup
EP1971294A1 (en) * 2006-01-09 2008-09-24 Silesco Pty Ltd Implantable joint prosthesis
EP1971294A4 (en) * 2006-01-09 2009-11-11 Silesco Pty Ltd Implantable joint prosthesis
WO2008015286A2 (en) * 2006-08-04 2008-02-07 Ceramtec Ag Insertion of vibration-damping elements in prosthetic systems for the manipulation and damping of natural frequencies
WO2008015286A3 (en) * 2006-08-04 2008-03-13 Ceramtec Ag Insertion of vibration-damping elements in prosthetic systems for the manipulation and damping of natural frequencies
US8226728B2 (en) 2006-08-04 2012-07-24 Ceramtec Gmbh Insertion of vibration-damping elements in prosthetic systems for the manipulation and damping of natural frequencies
US9566157B2 (en) 2006-11-07 2017-02-14 Biomedflex, Llc Three-member prosthetic joint
JP2013017761A (en) * 2011-07-14 2013-01-31 Nakashima Medical Co Ltd Artificial hip joint
EP2800540A4 (en) * 2012-01-03 2015-08-26 Biomedflex Llc Prosthetic joint assembly and joint member therefor
EP3701913A1 (en) * 2019-02-27 2020-09-02 ImplanTec Deutschland GmbH Acetabular cup for a hip joint endoprosthesis
EP3714840A1 (en) 2019-02-27 2020-09-30 ARTIQO GmbH Acetabular cup for a hip joint endoprosthesis

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