WO2019057434A1 - Prothèse de remplacement pour la tête de fémur naturelle - Google Patents

Prothèse de remplacement pour la tête de fémur naturelle Download PDF

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Publication number
WO2019057434A1
WO2019057434A1 PCT/EP2018/072721 EP2018072721W WO2019057434A1 WO 2019057434 A1 WO2019057434 A1 WO 2019057434A1 EP 2018072721 W EP2018072721 W EP 2018072721W WO 2019057434 A1 WO2019057434 A1 WO 2019057434A1
Authority
WO
WIPO (PCT)
Prior art keywords
replacement prosthesis
guide element
section
diameter
prosthesis according
Prior art date
Application number
PCT/EP2018/072721
Other languages
German (de)
English (en)
Inventor
Markus FLOHR
Maren FREUTEL
Kim Lars Häussler
Thomas Pandorf
Roman Preuss
Original Assignee
Ceramtec 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 Ceramtec Gmbh filed Critical Ceramtec Gmbh
Publication of WO2019057434A1 publication Critical patent/WO2019057434A1/fr

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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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3601—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices
    • A61F2/3603—Femoral heads ; Femoral endoprostheses for replacing only the epiphyseal or metaphyseal parts of the femur, e.g. endoprosthetic femoral heads or necks directly fixed to the natural femur by internal fixation devices implanted without ablation of the whole natural femoral head
    • 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
    • A61F2/30721—Accessories
    • A61F2/30723—Plugs or restrictors for sealing a cement-receiving space
    • 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
    • A61F2002/30337—Inverted concave conical connections, e.g. for opposing disconnection
    • 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
    • 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
    • A61F2002/30879—Ribs
    • A61F2002/30883—Ribs dovetail-shaped
    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented

Definitions

  • the invention relates to a replacement prosthesis for the natural femoral head having a base body having an outer spherical surface and an inner receiving space having an inner surface and an elongated guide member which extends away from the inner surface thereof away from the inner surface.
  • the guide element features that ensures a secure, permanent attachment to a bone and removal difficult to almost prevented. This ensures permanent attachment in a human or animal bone, preferably a femur.
  • Replacement prostheses for example, surface replacement prostheses, are also called resurfacing head, hip cap or cap prosthesis.
  • a surface replacement prosthesis made of metal or ceramic on the femoral head and anchored with bone cement.
  • the surface replacement prosthesis replaces only the articular cartilage of the femoral head and is used when the femur bone under the articular cartilage is not substantially damaged in shape or structure.
  • Previous ceramic surface replacement prostheses are largely based on known metallic designs and can be implanted cemented or cementless.
  • the internal receiving space is connected to the corresponding prepared bone by bone cement.
  • WO 2009/1 1 1624 discloses a joint implant with a pin having a wavy contour.
  • the diameter of the pin is continuously reduced, starting from the inside of the implant to the end of the pin. This diameter reduction facilitates centering for the user and inserting the joint implant into the bore of the bone structure.
  • the wavy contour extends along the surface of the pin. It has been found that it is difficult to fill all undercuts along the wave structure with cement, which is necessary for a secure anchoring of the implant. For this, a deep cement entry into the bore of the bone, a cancellous bone structure, would be required. As a result, the implantation is complicated and expensive and for the patient longer and thus riskier.
  • DE 102015205583 proposes a non-radially symmetrical design of the cross section of the guide pin (pin) of a resurfacing head. This should be a relaxation of the resurfacing head, due to rotational stress about its longitudinal axis, prevented. All disclosed in DE 102015205583 guide pins, regardless of their cross-sectional shape, taper in the direction away from the inner circumferential surface of the inner receiving space towards the end of the guide pins. This guide pin shape facilitates the user centering and inserting the joint implant into the bore of the bone structure.
  • the IT 471394 discloses various cross-sections of a pin of an implant, wherein along the edges of the pin tooth-like recesses and projections are provided. Such a structure creates undercuts which likewise support the axial fixing of the pin and counteract the removal of the implant from the femur.
  • a very deep introduction of cement into the femoral bore is required.
  • the sharp-edged tooth-like structure poses a significant risk of dislocation of the cementum structure under cyclic loading, which is accompanied by loosening and possible withdrawal of the head from the femur.
  • the pin of IT 471394 has a cross-sectional reduction, from the receiving space of the implant to the end of the pin, for ease of insertion and implementation.
  • a similar surface preparation to increase the roughness is not possible for resurfacing heads made of ceramic materials. Roughening the surfaces to be cemented would reduce the fracture toughness of the ceramic implant component.
  • the smooth surface in comparison to metallic prostheses in conjunction with the missing recesses results in that the axial pull-off force of the ceramic component is lower compared to a metal component.
  • the implantation, the setting process of a resurfacing head is done inter alia by hammer blows with the aim of making optimal contact between milled bone geometry and the inside of the head of the prosthesis.
  • the prosthesis is first placed on the bone and centered by means of the pin in the bone bore.
  • the cement between the inside of the prosthetic head and the bone cement is driven a few millimeters deep when driving the implant into the spongy structure of the prepared femur bone.
  • the tapering pin away from the prosthetic head which aids in centering, potentially introduces cement into the dynamic setting process along the pin is transported particularly deep into the cylindrical bore and is pressed by conical portions even along the hole in the spongy structure of the femur. This may affect the stability of the cancellous femur and possibly have a negative effect on the biological tissue. As a result, it can lead to a thermal overload in the polymerization of the cement as well as to a reduction in the supply and death of the tissue.
  • the invention is based on the object to improve a replacement prosthesis so that an axial release of the prosthesis difficult, ideally prevented, or almost impossible.
  • a replacement prosthesis according to the invention for the natural femoral head comprises a base body with an outer rounded surface, which is designed as a sliding partner, and an inner receiving space with an inner circumferential surface and a guide element in the form of a pin or pin.
  • the guide element extending in the longitudinal direction away from the lateral surface or surface has a diameter which varies over the length of the guide element.
  • the diameter of the guide element rises, starting from the inner circumferential surface of the receiving space. This increase may be a continuous, steady, or non-linear, non-steady increase. As a result, this leads to a mushroom-shaped guide element whose diameter is smaller at the connection point than at its first end.
  • the largest diameter of the guide element is adapted to the diameter of the bore of the femoral head so that when driving the prosthesis only a small gap, ideally no gap is present and thus prevents cement far into the bore of the femur is driven.
  • the shape of the guide element is formed such that, in the case of a resultant force in the longitudinal direction of the guide element, in the pulling direction, the movement in this direction obstructs the principle of self-locking, ideally completely prevented.
  • the guide element starting from its origin, ie, from its connection point on the inside of the resurfacing head on the surface of the receiving space over a limited section in diameter or in cross-section increasingly designed, ie D1 ⁇ D2, where D1 at the joint or the origin and D2 is measured at a distance X to the connection point, at the first end of the guide element.
  • D1 at the joint or the origin and D2 is measured at a distance X to the connection point, at the first end of the guide element.
  • the diameter increase may be tapered, performed as a cone having a self-locking cone angle.
  • the cone angle may have a value between 0 ° and 20 °, preferably a value around 5 °.
  • the value between the smallest and largest diameter or cross section of the self-locking portion of the guide element may have a value between 0.1 and 2 mm, preferably between 0.3 and 1 mm or 0.03 and 12 mm 2 , preferably between 0.28 and 3.14 mm 2 .
  • the increasing portion of the guide element, the self-locking portion of the guide member may be formed in the axial sectional view as a contour, which is defined by one or more mathematical functions such that the mechanical stresses acting in the application in the guide element are minimized.
  • the contour train or its descriptive mathematical function may be a so-called baud curve, or the mathematical function may be an exponential function or a logarithm function or a combination thereof.
  • Bone and the guide element in the area of diameter reduction a distance. This distance is filled in a cemented application with cement paste, wherein the cement paste in the bore of the bone has a connection with the cement paste in the interior of the receiving space of the prosthesis.
  • the guide element presses with its extended area against the existing in the bore of the bone cement there. It creates a very high contact voltage and thus the movement is inhibited, ideally prevented.
  • the length of the tapered portion of the guide element, the self-locking guide element portion can be varied system specific. Thus, it is possible to influence the possibly occurring mechanical stresses in the guide element and to optimize the size of the resulting undercut (clearance between guide element and bore in the bone).
  • the inventive design of the guide element causes the dynamic setting process of the prosthesis that the cement preferably remains in the region of the origin of the guide element and in the receiving space.
  • the cement enters the free space between the cylindrical bore of the bone and the reduced diameter of the guide element and reaches at most as far as the second end of the guide element.
  • a second section adjoins the self-locking guide section. This means that the guide element has a second end. The second portion is disposed between the first end and the second end.
  • the transition between the self-locking guide portion and the second portion is rounded, so that the insertion of the prosthesis is not hindered by this transition.
  • a smooth transition of the two sections allows a bone-friendly insertion of the prosthesis.
  • the second section may have a cylindrical cross-section.
  • the second portion may be formed of a plurality of regions that may have different diameters.
  • the second section can be formed from a region with a constant diameter, wherein this diameter can be equal to or smaller than the diameter at the first end of the guide element.
  • the second portion may be formed of a tapered portion. This means that the largest diameter of the guide element is arranged at the first end and reduces in the direction of the second end and also in the direction of the origin of the guide element.
  • the second portion may also consist of a combination of a cylindrical and a tapered region.
  • the cylindrical portion forms a guide during insertion and facilitates insertion of the prosthesis. In addition, it seals the bore in the bone against cement penetration.
  • a second section which tapers in the direction of the second end, decouples the guide element from the bone at its tip. As a result, the guide element in the region of the second end has no contact with the bone, whereby a force transmission to the bone at the tip of the guide element is avoided.
  • the second portion of the guide member consists of two regions, a cylindrical portion and a tapered portion
  • the diameter of the cylindrical portion may even be made excessively large relative to the diameter of the bore in the bone, thereby creating a slight interference fit.
  • a prosthesis according to the invention with a mushroom-shaped guide element can also be used without cement, ie without cement.
  • the free area between the hole in the bone and the guide element in the area near the origin, the undercut, can be filled by tissue growth, the so-called remodeling process of the bone.
  • the prosthesis according to the invention can, so to speak, grow firmly.
  • the replacement prosthesis, the implant is preferably provided with a textured and / or rough and / or porous outer surface / coating to assist in "growing" in the tissue
  • Such a prosthesis may be formed by a porous ceramic foam.
  • the interlocking principle of self-locking according to the invention can be used independently of the prosthesis material used.
  • a positive connection between the guide element and the femur can be achieved with both ceramic and metallic resurfacing heads. Even with metallic resurfacing heads, it would be possible to increase the cement anchorage and thus the resistance to pull-off forces.
  • a ceramic replacement prosthesis according to the invention may consist of oxidic ceramic material systems, comprising:
  • ZTA zirconia-reinforced alumina
  • Zirconia ceramic in particular yttrium-stabilized zirconia (3Y-TZP) or
  • Ce-stabilized zirconia which stabilizes the tetragonal phase of the zirconia with cerium oxide, or ⁇ All other composites based on zirconia, the dispersoid composite component being based on aluminates and also other rare earth stabilizers can be used, such as Gd and Sm, be formed.
  • the invention relates to a replacement prosthesis for the natural femoral head having a base body having an outer spherical surface and an inner receiving space having an inner surface and an elongated guide member which extends away from the inner surface thereof away from the inner surface.
  • the guide element features that ensures a secure, permanent attachment to a bone and removal difficult to almost prevented.
  • features in the form of reductions in the direction of the guide element are provided.
  • FIG. 1 shows a cross-section of a natural femoral head with an implanted replacement prosthesis, in extracts and in a schematic representation
  • FIG. 2 shows the guide element of the replacement prosthesis according to FIG. 1 enlarged, in excerpts and in a schematic representation
  • Figure 3 shows an alternative embodiment of the guide element of
  • FIG. 4 shows a further alternative embodiment of the guide element of FIG.
  • FIG. 1 shows a replacement prosthesis 1 according to the invention arranged on a natural femoral head 2.
  • the replacement prosthesis 1 comprises a main body 7 which is delimited by a surface 5 which is designed as a sliding surface and a surface 10 of a receiving space 3.
  • a guide element 4 is arranged on the main body 7.
  • the sliding partner (not shown) of the surface 5, may be natural bone tissue or even a prosthesis.
  • the surface 5, the receiving space 3 and its surface 10, and the guide member 4 are integrally connected to each other, wherein the transitions of the individual surfaces or components are rounded, tissue-friendly design.
  • the replacement prosthesis 1 also called the resurfacing head, has a guide element 4.
  • This guide element 4 is in a Bore 8 introduced in the femoral head 2.
  • the guide element 4 forms an aid, a centering aid, for the user.
  • the cross section A1 (marked as a diameter in FIG. 1) rises steadily up to its first end 14. This rising or conically shaped first section 26 forms the first region 26 of the guide element 4.
  • the cross section A2 at the first end 14 has a larger amount than the cross section A1 at the origin 9 of the guide element 4.
  • a fastener 20 which may consist of two areas.
  • a first region of the fastening element 20 is formed in the region of the bore 8 in the form of a wedge 19.
  • a second region of the fastening element 20 extends between the surface 10 of the replacement prosthesis and the femoral head 2.
  • Both regions of the fastening element are connected to one another in a material-locking manner.
  • the fastening element 20, in particular the wedge 19, counteracts a withdrawal force F (see arrow).
  • the existing bone cement fastener 20 adjusts itself not only in the area of the surface 10 of the receiving space 3 to the femoral head 2, but also in the area of the bore 8, in particular in the region of the origin 9, in which the guide element 4 with the base body 7 of the replacement prosthesis 1 is connected. Thus, a permanent, secure attachment of the replacement prosthesis 1 guaranteed.
  • the fastener 20, which is formed of cement, in particular its wedge 19, may extend from the first end 14 to the origin 9.
  • the wedge 19 of the fastening element 20 extends around the guide element. It can be rotationally symmetrical. Its length L is at least as large as the width, for example, the diameter D1 of the opening, or the bore 8.
  • the length of the wedge 19 may be up to four times (4) as large as the width D1.
  • the length can also be in the range of once (1) to four times (4), for example, 1, 5 or 2 or 3 times the width D1.
  • the manner of representation selected in FIG. 2 with the different hatchings of the fastening element 20 has been selected in order to clarify the region of the wedge 19. Regardless of this representation, the fastener 20 consists of two areas, which form a single part cohesively. In the application, the fastening element 20 counteracts positively a withdrawal force F.
  • the guide element 4 according to FIG. 3 has a second end 21 following its first end 14. Between the first end 14 and the second end 21, a second portion 22 is arranged.
  • the guide element 4 thus forms from the second section 22 and the first section 26 already described above in FIG. 1.
  • the definitions relating to the length of the first section 26 apply correspondingly to what has been described above.
  • the second section 22 has a constant cross-section A3, a constant diameter. If the guide element 4 is formed in a cylindrical shape, its diameter in the second section 22 is constant and can correspond to the diameter D1 of the bore 8 (not shown in FIG. 3).
  • the diameter A3 of the guide element 4 may be matched to the diameter D1 of the bore 8 so that a fit, preferably a press fit is formed. As a result, the attachment of the replacement prosthesis 1 is improved.
  • the guide member 4 in the bore 8 the risk that cement enters deep into the bore 8, reduced, ideally completely prevented.
  • the guide element 4 has a centering aid 23 within the second section 22. By means of the tapered in the direction of the second end 21 centering 23, the replacement prosthesis 1 can be easily inserted into the bore 8 of the femur 2. Same features bear the same reference numerals, the already described applies accordingly.
  • All embodiments of a replacement prosthesis according to the invention have a guide element 4 with a first section 26 which, starting from its origin 9 to its first end 14, has a rising cross section.

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  • 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)
  • Prostheses (AREA)

Abstract

La présente invention concerne une prothèse de remplacement (1) pour la tête de fémur (2) naturelle munie d'un corps de base (7) présentant une surface sphérique externe (5) et une cavité de réception interne (3) munie d'une surface interne (10) et d'un élément de guidage (4) de conception longitudinale et qui s'étend depuis la surface interne (10). Pour assurer un maintien durable et sûr de la prothèse de remplacement (1), l'élément de guidage (4) présente des caractéristiques qui assurent une fixation durable et sûre sur la tête de fémur (2) et qui rendent plus difficile une désolidarisation jusqu'à quasiment l'empêcher. Les caractéristiques sont en outre prévues sous forme de réductions en direction de l'élément de guidage (4).
PCT/EP2018/072721 2017-09-21 2018-08-23 Prothèse de remplacement pour la tête de fémur naturelle WO2019057434A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017008861.6 2017-09-21
DE102017008861 2017-09-21

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111166533A (zh) * 2019-12-30 2020-05-19 天衍医疗器材有限公司 一种表面置换股骨头的制造工艺以及股骨头

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT471394B (fr) 1950-12-04 1952-05-14
FR59919E (fr) * 1949-11-17 1954-09-21 Nouvelle forme de prothèse ostéo-articulaire
EP0715835A1 (fr) * 1994-11-09 1996-06-12 Xaver Kuoni Tige d'ancrage pour une endoprothèse d'articulation
WO2007109319A2 (fr) * 2006-03-21 2007-09-27 Axiom Orthopaedics, Inc. Élément glénoïde à stabilité de fixation améliorée
US20080262616A1 (en) * 2007-04-18 2008-10-23 Warsaw Orthopedic, Inc. Osteochondral graft and method of use for repairing an articular cartilage defect site
WO2009111624A2 (fr) 2008-03-06 2009-09-11 Moirai Orthopedics, Llc Implants et procédés d’utilisation
DE102015205583A1 (de) 2014-04-14 2015-10-15 Ceramtec Gmbh Oberflächenersatzprothese für den natürlichen Femurkopf

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR59919E (fr) * 1949-11-17 1954-09-21 Nouvelle forme de prothèse ostéo-articulaire
IT471394B (fr) 1950-12-04 1952-05-14
EP0715835A1 (fr) * 1994-11-09 1996-06-12 Xaver Kuoni Tige d'ancrage pour une endoprothèse d'articulation
WO2007109319A2 (fr) * 2006-03-21 2007-09-27 Axiom Orthopaedics, Inc. Élément glénoïde à stabilité de fixation améliorée
US20080262616A1 (en) * 2007-04-18 2008-10-23 Warsaw Orthopedic, Inc. Osteochondral graft and method of use for repairing an articular cartilage defect site
WO2009111624A2 (fr) 2008-03-06 2009-09-11 Moirai Orthopedics, Llc Implants et procédés d’utilisation
DE102015205583A1 (de) 2014-04-14 2015-10-15 Ceramtec Gmbh Oberflächenersatzprothese für den natürlichen Femurkopf

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111166533A (zh) * 2019-12-30 2020-05-19 天衍医疗器材有限公司 一种表面置换股骨头的制造工艺以及股骨头

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