WO2011023153A1 - Structuration de la surface de contact avec l'os d'endoprothèses - Google Patents

Structuration de la surface de contact avec l'os d'endoprothèses Download PDF

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Publication number
WO2011023153A1
WO2011023153A1 PCT/DE2010/000854 DE2010000854W WO2011023153A1 WO 2011023153 A1 WO2011023153 A1 WO 2011023153A1 DE 2010000854 W DE2010000854 W DE 2010000854W WO 2011023153 A1 WO2011023153 A1 WO 2011023153A1
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WO
WIPO (PCT)
Prior art keywords
bone
osseointegration
contact surface
primary
endoprosthesis
Prior art date
Application number
PCT/DE2010/000854
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German (de)
English (en)
Inventor
Bernhard Hildebrandt
Original Assignee
Bernhard Hildebrandt
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 Bernhard Hildebrandt filed Critical Bernhard Hildebrandt
Priority to DE112010003078T priority Critical patent/DE112010003078A5/de
Publication of WO2011023153A1 publication Critical patent/WO2011023153A1/fr

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    • 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
    • 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
    • A61F2/32—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
    • 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
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • 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
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30321—The prosthesis having different structural features at different locations within the same prosthesis differing in roughness
    • 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
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30322—The prosthesis having different structural features at different locations within the same prosthesis differing in surface structures
    • 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
    • A61F2002/30677—Means for introducing or releasing pharmaceutical products, e.g. antibiotics, into the body
    • 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
    • A61F2002/3082—Grooves
    • A61F2002/30823—Grooves having the shape of a reverse dovetail
    • 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
    • A61F2002/3082—Grooves
    • A61F2002/30827—Plurality of 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
    • 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
    • A61F2002/30904—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves serrated profile, i.e. saw-toothed
    • 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
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0025—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in roughness
    • 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
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0026—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in surface structures
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00389—The prosthesis being coated or covered with a particular material
    • A61F2310/00592—Coating or prosthesis-covering structure made of ceramics or of ceramic-like compounds
    • A61F2310/00796—Coating or prosthesis-covering structure made of a phosphorus-containing compound, e.g. hydroxy(l)apatite

Definitions

  • the invention relates to the structuring of endoprostheses according to the preamble of claim 1.
  • the bone contact surfaces of endoprostheses are provided with structures or coatings, on the one hand ingrowth (Verbundosteogenes) or growth
  • small metal rods Trabecular metal from Eska
  • spongiosa metal or they are for example by plasma spraying with titanium, hydroxyapatite, etc. coated with a coating.
  • the surfaces are also provided with ridges and grooves (for example Fa. Zimmer et al.), But the structure or coating of the ridges or grooves is uniform.
  • Patent application PCT / DE 2008/001965 describes circular or spiral grooves. In all these products and patents, however, the grooves are only for
  • the surface structure of these areas may be different.
  • many shank or short stem prostheses have a rough surface structure or coating in the area of the force transmission to stimulate osseointegration, while they have a smooth surface in the area of the stem tip because it only has a lateral support function and should remain movable relative to the bone Compensate for differences in the flexibility of the stem material to the surrounding bone. This means that in these areas no osseointegration is desired. These are areas with different functions.
  • the surfaces of the different regions are not applied in different planes, apart from the fact that the region in which the osseointegration is desired may be coated, which thereby occupies a slightly higher level.
  • the structuring according to the invention is provided within a functional region or as structuring of such a region and the arrangement of the planes corresponds exactly to the reverse arrangement, ie the rough osseointegration surfaces consist of depressions or depressions between the smooth primary contact surfaces.
  • the prior art endoprostheses thus provides different surface structures and coatings of different functional areas, but no structuring of these functional areas, especially not in different levels.
  • the object of the present invention is to remedy the problem of unsolved problems, especially in cementless anchored surface replacement prostheses
  • the spongy bone trabeculae grow approximately arcade-shaped towards the articular surface, so that after the milling, which is carried out to prepare the implant bed, the trabeculae remain like pillars. If a prosthesis contact surface is now placed on this column stubble field, which due to their roughness also
  • An optimal solution must therefore ensure a reliable primary stability and induce the osseointegration and provide the best conditions when driving the prosthesis on or in the bone available.
  • the bone contact surface according to the invention has a structuring in at least two different surface components, which are arranged in at least two different levels and of which at least one as the primary contact surface with the least possible roughness and at least one other as osseointegration surface with a
  • Osseointegration optimally promoting roughness or coating are formed.
  • Primary contact surfaces 2 are as smooth as possible - up to optimal smoothness by polishing 2a.
  • the roughness 2b should be so low in any case that on the surface of each of the
  • Coating 2h has to withstand considerable shear forces in zones Ie in which compressive sliding movement takes place between the endoprosthesis contact surface and the cancellous bone when the prosthesis shell is pressed on; have a firm connection to the pad and a high output resistance.
  • transitions or edges of the primary Contact surface 2 in the recesses or grooves of the osseointegration surfaces 4 are designed so that they do not kink or shear the trabeculae 7b when introducing the prosthesis 1.
  • they To slip onto trabeculae 7b, they must have broken edges 2c or "ski tips" 2d, and / or the individual primary contact surfaces 2 have a slope
  • the obliquely arranged individual primary contact surfaces 2 also have the effect that the edges lying behind with respect to the pressing-on direction 8 protrude inwards and catch or wed on spongiosa baskets, which prevents them from slipping back out of the prosthesis seat and
  • the osseointegration surfaces 4 are as wells, z.b. as dents, depressions, furrows, ditches, grooves or as a perforation in the primary or between the primary
  • the depressions relate to the bottom 4b of the osseointegration surfaces 4, i. the
  • the surface of the coating or the plane of the highest roughness peaks 4d may lie on the same plane as the primary contact surface 2 or slightly below it (see drawings, FIG. 4).
  • the plane 4d of the roughness peaks or the surface of the coating 5 of the osseointegration surfaces preferably lies somewhat below the plane of the primary contact surfaces 2.
  • the ends of the trabeculae 7b protrude in these zones in the area of the osseointegration surfaces 4 something, because they are pressure relieved there.
  • the surface of the coating 5 or the plane 4 d of the roughness peaks can be at the same height as the primary contact surfaces 2.
  • a compliant e.g., rough, soft, or cancellous
  • coated surfaces and / or different coating 5 and / or different levels are coated surfaces and / or different coating 5 and / or different levels.
  • the osseointegration surfaces 4 may become larger as the depth increases
  • cancellous bone 7a grows into cavities with some reluctance (see drawings, FIGS. 5, 5a, 6).
  • the shape of the depressions may be one or more geometric patterns (e.g.
  • Circles, triangles, squares, spots, furrows, grooves, etc. and / or any 190 or random pattern.
  • Their arrangement may correspond to a geometric pattern (eg circular, helical, spiral, circular, radial) and / or in random shapes and according to a random distribution pattern (eg resulting from a machining process producing a random pattern 6b (see drawings, Fig. 7, 7a).
  • the recesses of the osseointegration surfaces 4 may be formed by known methods such as milling, grinding, etching, water jet cutting or laser cutting equipment
  • the depressions can also be created, for example, by having a
  • coating 5 for the osseointegration surfaces 4 all materials are suitable which stimulate, promote or enable osseointegration (for example foam metal 5a, Trabecular
  • the coating 5 of the osseointegration surface 4 can also be effected, for example, by the fact that after the production of the depressions or grooves, the entire prosthesis Contact surface with the structure and / or coating is provided, which is provided for the wells and this is then ground down to the level of the primary contact surfaces 2 again.
  • contact surfaces 2 are provided with a wax or plastic layer, which spares them from the coating.
  • Coatings 5 by the plasma spraying process can by a heat-resistant wax, ceramic or plastic coating of the primary contact surfaces 2 on the
  • the osseointegration surfaces 4 or their coating 5 can be used to promote
  • 235 shows the example of a shaft prosthesis Ia, as in conventional prostheses different surfaces are arranged. It has a region Ic in which both a
  • Embodiment is also the entire surface Ic, in both a safe
  • FIG. 2 shows a surface replacement prosthesis Ib as shown in Fig. 2.
  • the region Ic in which both a primary stability and osseointegration is claimed, only partially 255 provided with the structuring 3 of the contact surface according to the invention.
  • FIG. 3 shows a cancellous bone 7a with the articular surface aligned schematically illustrated bone trabeculae 7b and several exemplary embodiments of structuring.
  • an osseointegration surface 4 consisting of two different surfaces 5e, 5f is shown, which has both a different coating 4a, 5a, and a
  • FIG. 3 shows a surface replacement prosthesis Ib as in Fig. 3, and
  • Fig. 5a shows its edge region Ig in magnification, which is associated with a zone Ie
  • the primary contact surfaces 2 a have rounded tips 2 d at the transition to the osseointegration surfaces 4.
  • the surface of the individual primary contact surfaces 2a has a slope 2e with respect to the total area of the
  • FIG. 1 to 5 A shows a reality adapted embodiment of the edge region Ig and the zone Ie 280 of a surface replacement prosthesis Ib.
  • the osseointegration surfaces 4 are applied here as circular grooves. Their width is 0.4 mm. The width of the primary contact surfaces 2 two is 0.8 mm. The bottom 4b of the osseointegration surfaces 4 is 0.15 mm deeper than the surface of the primary
  • Figure 3 shows an endoprosthesis 1 to which a 290 high roughness coating 6 has been applied by, for example, a plasma spray method to randomly form primary contact surfaces by grinding this coating to the intended height 6a.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

Les endoprothèses sur de l'os spongieux ont soit une face inférieure relativement lisse et présentent une stabilité primaire sûre, soit une structure rugueuse qui favorise la croissance de l'os mais n'offre pas de stabilité primaire satisfaisante. L'invention prévoit une structuration de la surface de contact avec l'os des endoprothèses dans au moins deux éléments de surface différents, à savoir dans des surfaces de contact primaires lisses qui entraînent une stabilité primaire sûre et génèrent un minimum de résistance à la friction lors de l'enfilement de la prothèse sur l'os, ainsi que dans des surfaces d'ostéointégration, situées dans des dépressions (par exemple, des rainures) et ayant une profondeur d'aspérité importante, qui favorisent l'ostéointégration par leur structure et/ou leur revêtement. Une cupule de prothèse de resurfaçage de hanche (1b) est subdivisée en surface de contact primaire (2a) et en surfaces d'ostéointégration évidées (4) par des rainures circulaires dans cet exemple, dans sa zone de bord (1g) réalisée coniquement sur la surface interne ainsi qu'au niveau de la transition du cône à la zone sphérique (1e). La transition de la surface de contact primaire au bord de la surface d'ostéointégration est arrondie (2d) pour faciliter le glissement de la surface de contact primaire sur l'os spongieux. Ce type de réalisation de la surface de contact avec l'os est particulièrement avantageux pour les endoprothèses qui sont implantées sur ou dans de l'os spongieux.
PCT/DE2010/000854 2009-07-25 2010-07-21 Structuration de la surface de contact avec l'os d'endoprothèses WO2011023153A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112010003078T DE112010003078A5 (de) 2009-07-25 2010-07-21 Strukturierung der knochenkontaktfläche von endoprothesen

Applications Claiming Priority (2)

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DE102009034746.1 2009-07-25
DE200910034746 DE102009034746A1 (de) 2009-07-25 2009-07-25 Endoprothesen, deren Knochenkontaktfläche in 2 Ebenen mit unterschiedlicher Oberflächenstruktur aufgeteilt ist

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WO2011023153A1 true WO2011023153A1 (fr) 2011-03-03

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CN104185457A (zh) * 2012-02-24 2014-12-03 陶瓷技术有限责任公司 用于自体股骨头的无骨水泥表面置换假体

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2288537A (en) * 1994-04-12 1995-10-25 Corin Medical Ltd A prosthesis component
EP0761182A2 (fr) * 1995-08-29 1997-03-12 JOHNSON & JOHNSON PROFESSIONAL Inc. Prothèse osseuse avec revêtement protégé pour croissance osseuse pénétrante
EP1133957A1 (fr) * 1998-09-15 2001-09-19 Hiswill Research & Development Implants avec surface d'ancrage osseux et procédé associé
WO2006028382A2 (fr) * 2004-09-08 2006-03-16 Einar Sudmann Element de prothese
US20080154378A1 (en) * 2006-12-22 2008-06-26 Warsaw Orthopedic, Inc. Bone implant having engineered surfaces

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008053566A1 (de) 2007-11-27 2009-06-04 Bernhard Hildebrandt System aus Endprothesen und Geräten zur minimal invasiven und zementfreien Implantation von Endoprothesen der Schulter und der Hüfte und der Offset-Verbesserung des Schenkelhalses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2288537A (en) * 1994-04-12 1995-10-25 Corin Medical Ltd A prosthesis component
EP0761182A2 (fr) * 1995-08-29 1997-03-12 JOHNSON & JOHNSON PROFESSIONAL Inc. Prothèse osseuse avec revêtement protégé pour croissance osseuse pénétrante
EP1133957A1 (fr) * 1998-09-15 2001-09-19 Hiswill Research & Development Implants avec surface d'ancrage osseux et procédé associé
WO2006028382A2 (fr) * 2004-09-08 2006-03-16 Einar Sudmann Element de prothese
US20080154378A1 (en) * 2006-12-22 2008-06-26 Warsaw Orthopedic, Inc. Bone implant having engineered surfaces

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DE112010003078A5 (de) 2012-09-20

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