WO1991003266A1 - Prothese - Google Patents

Prothese Download PDF

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Publication number
WO1991003266A1
WO1991003266A1 PCT/EP1990/001424 EP9001424W WO9103266A1 WO 1991003266 A1 WO1991003266 A1 WO 1991003266A1 EP 9001424 W EP9001424 W EP 9001424W WO 9103266 A1 WO9103266 A1 WO 9103266A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal oxide
prosthesis according
prosthesis
approximately
protective layer
Prior art date
Application number
PCT/EP1990/001424
Other languages
German (de)
English (en)
Inventor
Jochen Pauls
Original Assignee
Böhler Ag
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 Böhler Ag filed Critical Böhler Ag
Publication of WO1991003266A1 publication Critical patent/WO1991003266A1/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
    • A61F2/3662—Femoral shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
    • C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
    • C23C4/11—Oxides
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
    • C23C4/18—After-treatment
    • 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
    • A61F2002/30224—Three-dimensional shapes cylindrical
    • 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
    • A61F2002/30602—Shaft made of a bundle of anchoring rods or bristles, e.g. fasciculate shaft
    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/365—Connections of heads to necks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F2230/0069—Three-dimensional shapes cylindrical
    • 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
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
    • 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
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00179—Ceramics or ceramic-like 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
    • A61F2310/00598—Coating or prosthesis-covering structure made of compounds based on metal oxides or hydroxides
    • 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
    • A61F2310/00598—Coating or prosthesis-covering structure made of compounds based on metal oxides or hydroxides
    • A61F2310/00604—Coating made of aluminium oxide or hydroxides
    • 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
    • A61F2310/00598—Coating or prosthesis-covering structure made of compounds based on metal oxides or hydroxides
    • A61F2310/00616—Coating made of titanium oxide or hydroxides
    • 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
    • A61F2310/00598—Coating or prosthesis-covering structure made of compounds based on metal oxides or hydroxides
    • A61F2310/00634—Coating made of zirconium oxide or hydroxides
    • 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 a prosthesis according to the preamble of claim 1 and a method for producing such.
  • prostheses e.g. Hip joint prostheses
  • the first type of prosthesis has a smooth fastening shaft that is positively bonded to the hard outer layer of the bone (Compacta) using PMMA-based bone cement.
  • the cementless implantable prostheses have a surface structure on which newly formed cancellous bone material can get caught and anchored.
  • cementlessly implanted prostheses come into contact with living tissue, they also come into contact with body fluids. These could chemically attack the metal of the base body over very long periods of time, as can be achieved in the case of cementlessly implanted prostheses, since the tissue surrounding them is stimulated by the mechanical alternating loads to undergo permanent new formation.
  • the present invention is therefore intended to develop a prosthesis according to the preamble of claim 1 in such a way that its metallic base body is not chemically attacked even in very long periods of time.
  • the prosthesis according to the invention has a liquid-impermeable thin metal oxide layer, which is the metallic
  • the layer protects base body reliably against electrolytic body fluids. Since the layer is thin, it can also follow sharp changes in direction of the surface of the base body, so that one still has the desired mechanical embedding areas for cancellous material growing against the prosthesis. Since the thermally sprayed metal oxide layer is mineral sealed to form a liquid barrier and / or is compacted without pores by isostatic hot spitting, it is also possible to access areas of prostheses with a complicated surface structure that are difficult to access, such as e.g. is described in DE-OS 36 16 665, provided with this liquid-tight coating. The production of a uniform and dense protective layer of this type is to be carried out in the manner specified in claim 1 even at reasonable costs.
  • the protective layers are distinguished by good adhesion to the metallic base and good elasticity and impact resistance. They also grow quickly and permanently with cancellous material.
  • the development of the invention according to claim 9 facilitates the penetration of the melt impregnation even into fine-pored metal oxide layers.
  • the temperature at which the hot isostatic pressing is carried out is selected at about 1400 ° C. and the pressure for the production of the prosthesis
  • the individual particles that form the thermally sprayed metal oxide layer are melted sufficiently on the surface to ensure that these particles can be displaced in the layer to form a continuous pore-free layer, but on the other hand the metallic base body has not yet seriously compromised its strength and retains its surface geometry, which specifies a large number of small anchoring surfaces.
  • Figure 1 a side view of the upper end of a Femur with a cementless implanted prosthesis, part of the compacta and spongiosa having broken away in order to be able to show the anchoring structure of the prosthesis;
  • Figure 2 is a greatly enlarged view of a portion of an anchoring pillar of the prosthesis shown in Figure 1;
  • FIG. 3 a further greatly enlarged section through the edge layer structure of an anchoring pillar which has been surface-treated in a special way.
  • FIG. 1 shows the upper end section of a thigh bone 10.
  • the solid outer layer of the thigh bone 10 has broken away in such a way that a window 12 similar to that which is sawn out by the surgeon for inserting the prosthesis is obtained.
  • the compacta lies spongiosa material 14, indicated by dotting, which in reality has a fibrous structure with trabeculae 16 following the force transmission lines, which are shown in an uppermost, non-broken-off partial layer of the spongiosa material.
  • a total of 18 prosthesis is inserted into the upper end of the bone.
  • This includes a support wall 20, which essentially has the shape of a double-angled part, with a wall section 22, which runs to the minor trochanter, and with a second wall section 24, which creates a flush connection to the Adam's arch.
  • the supporting wall 20 thus represents a cap which replaces the compacta at the upper end of the bone and surrounds the cancellous material 14.
  • a pin 26 is formed on the upper side of the support wall 20, to which a joint ball 28 made of ceramic and polished on the outside is fastened. This works together with an acetabular cup to be implanted in the pelvis, which is not shown in the drawing.
  • anchoring posts 30 run inwards into the spongiosa material 14.
  • the basic direction of extension of the anchoring pillars 30 is essentially parallel to the
  • the individual anchoring pillars 30 are somewhat curved in accordance with the course of the trabecular trajectories.
  • the free ends of the anchoring pillars 30 end at a distance from the Compacta.
  • the anchoring pillars 30 each have a plurality of axially successive anchoring collars. ' 2 on. These are distributed essentially at the same distance in the cancellous material 14, which after the implantation of the prosthesis 18 has grown between the anchoring pillars 30 and thus fulfills elongated columnar spaces.
  • the annular end faces of the anchoring collars 32, their axial spacing, the thickness of their core section and the length, number and spacing of the anchoring posts 30 are so dimensioned overall that the local stresses in the cancellous bone after the prosthesis has healed are not so are large that permanent damage to the cancellous bone occurs, but on the other hand are not so small that the mechanical stimuli desired for the constant renewal of the cancellous bone fail to materialize.
  • the prosthesis part 18 is produced in such a way that first a Co-Cr-Mo organic alloy blank is poured and this after removal of the casting mold in a conventional manner, first so that the surfaces are clean, especially grease-free.
  • This cleaning is done e.g. by heating the blank to 420 ° C. in an air circulating oven for about an hour. In this way, impurities on the surface are oxidized and loosened mechanically.
  • the base body is then blasted mechanically using sharp-edged Al 2 O 3 blasting material with a particle size of approximately 0.1 mm.
  • the blasting material is directed at 3 bar from an 8 mm blasting nozzle with a cone opening angle of 35 ° against the casting from a distance of 30 cm.
  • An approximately 50 ⁇ to approximately 350 ⁇ thick ceramic mixed layer of 60% by weight A1 2 .0 and 40% by weight Ti0 2 is sprayed onto the surface of the casting thus prepared by plasma spraying in a high-speed plasma spraying system.
  • the sprayed powder is agglomerated and has a grain size of approximately 45 ⁇ with a diameter of the individual particles of 5.6 ⁇ .
  • Plasma spraying is carried out using an argon / hydrogen mixture.
  • the porosity of the sprayed-on layer is 2% by volume and its density is 3.6 g / cm ⁇ .
  • the ceramic layer can also be applied by flame shock spraying instead of plasma spraying.
  • Loose particles are then removed from the base body provided with the ceramic layer, for example by ultrasound cleaning or repeated blasting with fine Al 2 O particles.
  • the ceramic layer 36 has individual grains 38 sintered together and the pores 40 remaining between them.
  • the pores 40 are exaggerated in size and in practice take up considerably less space, for example the 2 vol. %.
  • a porous ceramic layer soaks up after the implantation of the prosthesis due to the capillary effect with body fluid, which can thus reach the previously extremely cleaned surface of the metallic base body 34. This can then be attacked electrolytically in the long term, which is disadvantageous on the one hand with regard to the migration of metal ions back into the body's own tissue and on the other hand with regard to the infiltration of the ceramic layer.
  • the pores 40 remaining between the grains 38 are closed by a barrier layer 42.
  • This barrier layer can be formed by a kiesel impregnation, a melt impregnation or by compacting the outermost grain layers by hot isostatic pressing, as will now be described in more detail below.
  • the base body 34 carrying the ceramic layer 36 is immersed in an aqueous silicate solution (eg water glass solution).
  • aqueous silicate solution eg water glass solution
  • This can additionally contain a physiological wetting agent such as porin.
  • the silicate solution penetrates into the pores 40 due to the capillary effect.
  • the base body 34 with the ceramic layer 36 now soaked with silicate solution is then treated for about 5 minutes at 100 ° C. in wet steam.
  • the silicates harden through silicification.
  • the barrier layer 42 is then examined for freedom from holes, for example by immersing the prosthesis in an electrolyte and the current between the metallic base body 34 and one that is also immersed in the electrolyte Counter electrode measures. If the barrier layer 42 is not error-free, the step of forming the barrier layer can simply be repeated again.
  • a mineral blocking agent that is curable at low temperatures is introduced into a carrier material in finely divided form.
  • a melting glass type such as solder glass in the form of a fine frit suspended in water
  • finely ground frits of the aforementioned oxides or glass frits suspended in a gas stream are again applied to the ceramic layer 36 by dipping or spraying or powder coating processes.
  • the base body carrying the impregnated ceramic layer 36 is treated for about 30 minutes at a temperature sufficient to split off the residual water of the dry gel or to melt the mineral blocking agent.
  • Typical treatment temperatures for frits made from finely ground glass are around 300 to 320 ° C, typical temperatures for curing metal oxide dry gels are around 220 to 230 ° C.
  • the blocking agent penetrates into the pores 40 by capillary effect closes the pores on the surface. Whether the barrier layer 42 is free of holes is again checked as described above. If the barrier layer contains 42 errors, the step of forming the barrier layer can simply be repeated.
  • the barrier layer 42 produced by compacting the ceramic layer 36 itself which has the advantage that no additional material component is introduced.
  • the surface of the ceramic layer 36 is "provisionally" closed, e.g. B. by the silicification impregnation described in more detail above.
  • the layer structure obtained in this way is compacted by hot isostatic pressing at 1400 ° C. and 200 bar in an autoclave, an inert gas such as argon or helium being used as the protective gas. Pressure and temperature are maintained in the autoclave over a period of about 60 minutes, and one is obtained after slow cooling and removal of the prosthesis from the autoclave on the casting base body designated 34 in FIG.
  • the ceramic layer 36 permanently electrically and chemically insulates the surface of the base body 34.
  • a highly porous adhesive layer 44 made of hydroxyapatite is then sprayed onto the ceramic layer 36 by plasma spraying. With its large surface area, this promotes the growth of cancellous bone.
  • the thickness of the hydroxyapatite layer is 5 to 150 ⁇ , preferably 30 to 50 ⁇ .
  • the ceramic layer 36 is impact-resistant due to its thickness and the special choice of material, the liquid barrier formed by it is retained even if the prosthesis is improperly stored or transported or falls to the floor.

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • Cardiology (AREA)
  • Physics & Mathematics (AREA)
  • Materials Engineering (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)
  • Materials For Medical Uses (AREA)

Abstract

Une prothèse implantable sans l'aide de ciment présente un corps de base (34) moulé en un alliage Co-Cr-Mo et une couche protectrice mince d'oxyde métallique (36) appliquée sur ledit corps de base, laquelle est préparée par projection au plasma pour être ensuite rendu exempte de pores par pressage isostatique à chaud ou scellage (42) par voie minérale. Une couche d'adhérence d'apatite hydroxylé (44) est appliquée sur cette couche protectrice (36) par projection au plasma.
PCT/EP1990/001424 1989-08-31 1990-08-25 Prothese WO1991003266A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3928845A DE3928845A1 (de) 1989-08-31 1989-08-31 Prothese
DEP3928845.5 1989-08-31

Publications (1)

Publication Number Publication Date
WO1991003266A1 true WO1991003266A1 (fr) 1991-03-21

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ID=6388291

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Application Number Title Priority Date Filing Date
PCT/EP1990/001424 WO1991003266A1 (fr) 1989-08-31 1990-08-25 Prothese

Country Status (3)

Country Link
AU (1) AU6291290A (fr)
DE (1) DE3928845A1 (fr)
WO (1) WO1991003266A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066966A1 (fr) * 1998-06-22 1999-12-29 Anatoly Dosta Revetement de type film fin pour implant osseux
US7998523B2 (en) 2005-11-02 2011-08-16 Smith And Nephew Orthopaedics Ag Open-pore biocompatible surface layer for an implant, methods of production and use
RU2624369C1 (ru) * 2016-03-17 2017-07-03 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Томский государственный университет систем управления и радиоэлектроники Устройство для обработки поверхности имплантатов
RU2624368C1 (ru) * 2016-03-17 2017-07-03 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Томский государственный университет систем управления и радиоэлектроники Устройство для обработки поверхности имплантатов

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Publication number Priority date Publication date Assignee Title
JPH06105900A (ja) * 1992-09-22 1994-04-19 Mitsubishi Materials Corp 生体活性セラミックス被覆インプラント
NL1004207C2 (nl) * 1996-10-04 1998-04-07 Accis B V Gewrichtsprothese.
DE19740689A1 (de) * 1997-09-16 1999-03-18 Franz Prof Dr Med Copf Oberschenkelprothese
DE19752674B4 (de) * 1997-11-28 2006-12-14 Ceramtec Ag Innovative Ceramic Engineering Künstliches Gelenk einer Prothese
EP1111089A1 (fr) * 1999-12-13 2001-06-27 Sulzer Markets and Technology AG Procédé pour sceller une couche poreuse à la surface d'un objet, en particulier pour sceller une couche obtenue par pulvérisation thermique
CA2499559A1 (fr) * 2002-10-03 2004-04-15 Alberta Research Council Inc. Revetement protecteur ceramique
US20070158446A1 (en) * 2006-01-05 2007-07-12 Howmedica Osteonics Corp. Method for fabricating a medical implant component and such component
US8187660B2 (en) 2006-01-05 2012-05-29 Howmedica Osteonics Corp. Method for fabricating a medical implant component and such component

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003977A1 (fr) * 1984-12-28 1986-07-17 Battelle-Institut E.V. Procede pour fabriquer des materiaux de remplacement des os implantables
WO1986006617A1 (fr) * 1985-05-07 1986-11-20 Plasmainvent Ag Revetement d'un corps d'implant
EP0248117A2 (fr) * 1986-06-03 1987-12-09 Aesculap Ag Procédé de dépôt d'une couche de protection sur des prothèses endoarticulaires
EP0264353A2 (fr) * 1986-10-17 1988-04-20 Permelec Electrode Ltd Matériau composite revêtu de phosphate de calcium et procédé pour l'obtenir
WO1989005161A1 (fr) * 1987-12-09 1989-06-15 Plasmainvent Ag Couche de glissement pour endoprotheses d'articulations et son procede de production
EP0371491A1 (fr) * 1988-11-29 1990-06-06 Thomas Dr. Heinl Implant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986003977A1 (fr) * 1984-12-28 1986-07-17 Battelle-Institut E.V. Procede pour fabriquer des materiaux de remplacement des os implantables
WO1986006617A1 (fr) * 1985-05-07 1986-11-20 Plasmainvent Ag Revetement d'un corps d'implant
EP0248117A2 (fr) * 1986-06-03 1987-12-09 Aesculap Ag Procédé de dépôt d'une couche de protection sur des prothèses endoarticulaires
EP0264353A2 (fr) * 1986-10-17 1988-04-20 Permelec Electrode Ltd Matériau composite revêtu de phosphate de calcium et procédé pour l'obtenir
WO1989005161A1 (fr) * 1987-12-09 1989-06-15 Plasmainvent Ag Couche de glissement pour endoprotheses d'articulations et son procede de production
EP0371491A1 (fr) * 1988-11-29 1990-06-06 Thomas Dr. Heinl Implant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999066966A1 (fr) * 1998-06-22 1999-12-29 Anatoly Dosta Revetement de type film fin pour implant osseux
US7998523B2 (en) 2005-11-02 2011-08-16 Smith And Nephew Orthopaedics Ag Open-pore biocompatible surface layer for an implant, methods of production and use
RU2624369C1 (ru) * 2016-03-17 2017-07-03 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Томский государственный университет систем управления и радиоэлектроники Устройство для обработки поверхности имплантатов
RU2624368C1 (ru) * 2016-03-17 2017-07-03 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования Томский государственный университет систем управления и радиоэлектроники Устройство для обработки поверхности имплантатов

Also Published As

Publication number Publication date
AU6291290A (en) 1991-04-08
DE3928845A1 (de) 1991-03-07

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