DE102010047967A1 - Joint prosthesis comprises part which is provided with surface that interacts frictionally with complementary surface of another part, where portion of one of surfaces is provided with recesses - Google Patents

Joint prosthesis comprises part which is provided with surface that interacts frictionally with complementary surface of another part, where portion of one of surfaces is provided with recesses Download PDF

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Publication number
DE102010047967A1
DE102010047967A1 DE201010047967 DE102010047967A DE102010047967A1 DE 102010047967 A1 DE102010047967 A1 DE 102010047967A1 DE 201010047967 DE201010047967 DE 201010047967 DE 102010047967 A DE102010047967 A DE 102010047967A DE 102010047967 A1 DE102010047967 A1 DE 102010047967A1
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Germany
Prior art keywords
joint prosthesis
recesses
microns
joint
another part
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Ceased
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DE201010047967
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German (de)
Inventor
Dr. Schulz Arndt-Peter
Robert Wendlandt
Mohamad Tarabolsi
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.)
UNIVERSITAETSKLINIKUM SCHLESWIG HOLSTEIN CAMPUS LUEBECK
Universitatsklinikum Schleswig-Holstein Campus Luebeck
Original Assignee
UNIVERSITAETSKLINIKUM SCHLESWIG HOLSTEIN CAMPUS LUEBECK
Universitatsklinikum Schleswig-Holstein Campus Luebeck
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Priority to DE201010047967 priority Critical patent/DE102010047967A1/en
Publication of DE102010047967A1 publication Critical patent/DE102010047967A1/en
Ceased legal-status Critical Current

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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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • 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
    • 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
    • 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
    • A61F2002/30291—Three-dimensional shapes spirally-coiled, i.e. having a 2D spiral cross-section
    • 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
    • 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
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30682—Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
    • 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
    • A61F2002/30667—Features concerning an interaction with the environment or a particular use of the prosthesis
    • A61F2002/30682—Means for preventing migration of particles released by the joint, e.g. wear debris or cement particles
    • A61F2002/30683—Means for collecting wear particles in a hollow cavity inside the prosthesis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30838—Microstructures
    • 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
    • A61F2002/30934—Special articulating surfaces
    • 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
    • A61F2/3094—Designing or manufacturing processes
    • A61F2002/3097—Designing or manufacturing processes using laser

Abstract

The joint prosthesis comprises a part which is provided with a surface that interacts frictionally with a complementary surface of another part. A portion of one of the surfaces is provided with recesses with depth of 10 to 150 micro meters and width of 25 to 250 micro meters. The recesses form a geometric pattern.

Description

Die Nutzungsdauer künstlicher Gelenke, z. B. Hüftgelenksprothesen ist begrenzt. Die Gründe für die Notwendigkeit einer Prothesenentfernung und Neuimplantationen sind Lockerungen, Luxation, Frakturen und Infektionen. Die mit Abstand häufigste in der Literatur genannte Ursache für ein Implantatversagen mit nachfolgender Wechseloperation ist die abriebbedingte Auflösung des Knochengewebes (Osteolyse) im Hüftgelenk. Abriebpartikel, die aus dem künstlichen Gelenk oder dem verbleibenden Knochenteil stammen, verursachen Fremdkörperreaktionen im Körpergewebe und führen zur Resorption des Knochens, was letztlich die Lockerung und das Versagen der Prothesen verursacht. Diese Abriebpartikel entstehen an allen Grenzflächen der Gelenkkomponenten sowie zwischen Knochen und Implantat. Abriebpartikel entstehen vor allem durch die Reibung der Komponenten aufeinander (auch Gleitpaarung genannt), die aus metallischen und keramischen Werkstoffen hergestellt werden.The useful life of artificial joints, z. B. Hip joint prostheses is limited. The reasons for the need for prosthesis removal and reimplantations are loosening, dislocation, fractures and infections. By far the most common cause of an implant failure with subsequent replacement surgery mentioned in the literature is the abrasion-induced dissolution of the bone tissue (osteolysis) in the hip joint. Abrasion particles originating from the artificial joint or remaining bone part cause foreign body reactions in the body tissue and result in resorption of the bone, ultimately causing the loosening and failure of the prostheses. These wear particles arise at all interfaces of the joint components as well as between bone and implant. Abrasion particles are mainly due to the friction of the components on each other (also called sliding pair), which are made of metallic and ceramic materials.

Künstlicher Gelenkersatz wird in den allermeisten Fällen aus Metall, Keramik oder Kunststoffen oder aus Kombinationen dieser Materialien hergestellt. Um die Gleitpaarung zwischen diesen Komponenten zu verhindern, werden teilweise zusätzliche Kunststoffe verwendet. Bei den derzeit genutzten Gleitpaarungen, mit Ausnahme von Keramik, entstehen noch deutliche Mengen an Abriebmaterial. Die Keramik-Keramik-Gleitpaarung zeichnet sich durch eine hohe Verschleißbeständigkeit aus. Jedoch ist die Bruchgefahr der Keramikkomponenten aufgrund der geringeren Bruchzähigkeit dieses Werkstoffes deutlich erhöht.Artificial joint replacement is made in the vast majority of cases of metal, ceramics or plastics or combinations of these materials. To prevent the sliding between these components, some additional plastics are used. With the currently used sliding bearings, with the exception of ceramics, significant amounts of abrasion material are still produced. The ceramic-ceramic sliding pair is characterized by a high wear resistance. However, the risk of breakage of ceramic components is significantly increased due to the lower fracture toughness of this material.

Daher ist es die Aufgabe der Erfindung, eine neuartige Oberflächenstruktur von künstlichen Gelenken bereitzustellen, die aufgrund ihrer tribologischen Oberflächeneigenschaften deutlich geringere Verschleißerscheinungen aufweisen.Therefore, it is the object of the invention to provide a novel surface structure of artificial joints, which have significantly lower wear due to their tribological surface properties.

Die Aufgabe wird gelöst mit den Merkmalen des Hauptanspruches. Die Unteransprüche geben die vorteilhafte Ausgestaltung der Erfindung an.The object is achieved with the features of the main claim. The dependent claims indicate the advantageous embodiment of the invention.

Die Erfindung beschreibt eine Gelenkprothese, die aus wenigstens einem Teil besteht, wobei das andere Teil des Gelenkes das biologische sein kann. Erfindungsgemäß ist eine Fläche des Prothesenteil des Gelenks, die mit einer komplementären Fläche des anderen Teils reibschlüssig zusammen wirkt, wenigstens teilweise mit mikrostrukturierten Vertiefungen versehen,. Vorzugsweise umfasst der Bereich der Mikrostrukturierung die gesamte, mit dem komplementären Teil in Verbindung stehende Oberfläche der Gelenkfläche und oder beider der Gelenkflächen. Die erfindungsgemäße Vertiefungen können jedoch auch auf einen kleineren Bereich des Gelenkes beschränkt sein, z. B. auf die Grenzflächen des Gelenkes. Eine derart mit beispielsweise als Rillen ausgebildeten Vertiefungen versehene Hüftgelenksprothese gewährleistet einerseits eine bessere Verteilung der Gelenkschmiere auf der Oberfläche und bewirkt somit die Verbesserung der Gleitfähigkeit der komplementären Flächen. Zusätzlich können sich in den Vertiefungen Abriebpartikel, die bei der Reibung der Flächen aufeinander entstehen, in den Vertiefungen sammeln und vorzugsweise gerichtet abtransportiert werden und somit ein Fortschreiten des Abriebvorganges verhindernThe invention describes a joint prosthesis, which consists of at least one part, wherein the other part of the joint may be biological. According to the invention, one surface of the prosthetic part of the joint, which interacts frictionally with a complementary surface of the other part, is provided at least partially with microstructured depressions. Preferably, the region of the microstructure comprises the entire surface of the articular surface communicating with the complementary part and / or both of the articular surfaces. However, the depressions according to the invention may also be limited to a smaller area of the joint, for. B. on the interfaces of the joint. On the one hand, such a hip joint prosthesis provided with depressions designed, for example, as grooves ensures a better distribution of the synovial fluid on the surface and thus improves the gliding ability of the complementary surfaces. In addition, in the recesses abrasion particles, which arise in the friction of the surfaces to each other, collect in the wells and preferably transported away direction and thus prevent progression of the abrasion process

Die als Rillen ausgebildeten Vertiefungen sind derart ausgestaltet, dass sie 10–150 μm tief und 25–250 μm breit sind und vorzugsweise geometrische Muster beispielsweise Quadrate, Schachbrett, Spiralen, Dimpels, Rauten, Diamanten oder Schneckenstrukturen bilden. Besonders vorteilhaft haben sich Gelenkoberflächen mit gekrümmten Bahnen (z. B. Spirale) erwiesen, wobei die Tiefe der Rillen 50 μm und die Breite der Rillen 25 μm beträgt.The depressions formed as grooves are designed such that they are 10-150 μm deep and 25-250 μm wide and preferably form geometric patterns such as squares, chessboard, spirals, dimples, diamonds, diamonds or screw structures. Joint surfaces with curved paths (eg spiral) have proven particularly advantageous, the depth of the grooves being 50 μm and the width of the grooves being 25 μm.

Einen geringen Abrieb zeigen auch Gelenkoberflächen, die eine schachbrettmusterartige Struktur bilden, deren Breite und Tiefe identisch ist.Joint surfaces, which form a checkered pattern-like structure whose width and depth are identical, also show a low degree of abrasion.

Die erfindungsgemäßen Mikrostrukturen auf der Prothesenoberfläche lassen sich mittels Laser-Bearbeitung herstellen. Es ist ebenfalls möglich, die Rillen in die Oberfläche zu ätzen oder mittels Sprühverfahren zu beschichten.The microstructures according to the invention on the prosthesis surface can be produced by means of laser processing. It is also possible to etch the grooves in the surface or to coat by spraying.

Claims (7)

Gelenkprothese mit wenigstens einem Teil, das mit einer Fläche versehen ist, die mit einer komplementär ausgebildeten Fläche eines anderen Teiles reibschlüssig zusammen wirkt, dadurch gekennzeichnet, dass wenigstens ein Teil der einen der Flächen mit Vertiefungen versehen ist, deren Tiefe 10–150 μm und deren Breite 25–250 μm beträgtJoint prosthesis having at least one part which is provided with a surface which frictionally cooperates with a complementarily shaped surface of another part, characterized in that at least a part of the one of the surfaces is provided with depressions whose depth is 10-150 microns and their Width is 25-250 microns Gelenkprothese nach Anspruch 1, dadurch gekennzeichnet, dass die Vertiefungen eine Breite von 25 μm bis 50 μm haben.Joint prosthesis according to claim 1, characterized in that the recesses have a width of 25 microns to 50 microns. Gelenkprothese nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Vertiefungen eine Tiefe von 50 μm bis 75 μm haben.Joint prosthesis according to claim 1 or 2, characterized in that the depressions have a depth of 50 microns to 75 microns. Gelenkprothese nach einem der o. g. Ansprüche, dadurch gekennzeichnet, dass die Vertiefungen ein geometrisches Muster bilden.Joint prosthesis according to one of the above. Claims, characterized in that the recesses form a geometric pattern. Gelenkprothese nach einem der o. g. Ansprüche, dadurch gekennzeichnet, dass die Vertiefungen nach Art eines Schachbrettmuster angeordnet sind.Joint prosthesis according to one of the above. Claims, characterized in that the recesses are arranged in the manner of a checkerboard pattern. Gelenkprothese nach einem der Ansprüche 1–4, dadurch gekennzeichnet, gekrümmte Bahnen aufweisen. Joint prosthesis according to one of claims 1-4, characterized in having curved tracks. Gelenkprothese nach einem der o. g. Ansprüche, dadurch gekennzeichnet, dass die Vertiefungen mittels Laser in die Fläche eingebracht sind.Joint prosthesis according to one of the above. Claims, characterized in that the recesses are introduced by means of laser in the surface.
DE201010047967 2010-10-08 2010-10-08 Joint prosthesis comprises part which is provided with surface that interacts frictionally with complementary surface of another part, where portion of one of surfaces is provided with recesses Ceased DE102010047967A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5879406A (en) * 1997-07-15 1999-03-09 Saint-Gobain Industrial Ceramics, Inc. Artificial joint bioprosthesis for mitigation of wear
US5916269A (en) * 1996-06-03 1999-06-29 Depuy Orthopaedics, Inc. Wear reduced acetabular component
DE102007031664A1 (en) * 2006-08-04 2008-02-14 Ceramtec Ag Innovative Ceramic Engineering Structured surface of a ball head or a socket insert of an artificial hip joint to prevent dry running
DE102007014265A1 (en) * 2007-03-21 2008-09-25 Eska Implants Gmbh & Co.Kg Joint ball or cap implant for an artificial hip joint
US20100262250A1 (en) * 2006-11-07 2010-10-14 Kellar Franz W Prosthetic ball-and-socket joint

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5916269A (en) * 1996-06-03 1999-06-29 Depuy Orthopaedics, Inc. Wear reduced acetabular component
US5879406A (en) * 1997-07-15 1999-03-09 Saint-Gobain Industrial Ceramics, Inc. Artificial joint bioprosthesis for mitigation of wear
DE102007031664A1 (en) * 2006-08-04 2008-02-14 Ceramtec Ag Innovative Ceramic Engineering Structured surface of a ball head or a socket insert of an artificial hip joint to prevent dry running
US20100262250A1 (en) * 2006-11-07 2010-10-14 Kellar Franz W Prosthetic ball-and-socket joint
DE102007014265A1 (en) * 2007-03-21 2008-09-25 Eska Implants Gmbh & Co.Kg Joint ball or cap implant for an artificial hip joint

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