[go: up one dir, main page]

WO2008015290A1 - Coque métallique à enveloppe extérieure poreuse, utilisée pour réduire les déformations de coque dans des cas d'ajustement serré - Google Patents

Coque métallique à enveloppe extérieure poreuse, utilisée pour réduire les déformations de coque dans des cas d'ajustement serré Download PDF

Info

Publication number
WO2008015290A1
WO2008015290A1 PCT/EP2007/058129 EP2007058129W WO2008015290A1 WO 2008015290 A1 WO2008015290 A1 WO 2008015290A1 EP 2007058129 W EP2007058129 W EP 2007058129W WO 2008015290 A1 WO2008015290 A1 WO 2008015290A1
Authority
WO
WIPO (PCT)
Prior art keywords
porous outer
outer coating
metal
pelvic bone
cup
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2007/058129
Other languages
German (de)
English (en)
Inventor
Roman Preuss
Dr. Thomas Pandorf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ceramtec GmbH
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 WO2008015290A1 publication Critical patent/WO2008015290A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/3094—Designing or manufacturing processes
    • 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
    • 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
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
    • A61F2002/30011—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in porosity
    • 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
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
    • A61F2002/30014—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
    • 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
    • A61F2002/30561—Special structural features of bone or joint prostheses not otherwise provided for breakable or frangible
    • 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
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A61F2002/30616—Sets comprising a plurality of prosthetic parts of different sizes or orientations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2002/3092—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth having an open-celled or open-pored structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • 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
    • 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
    • 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
    • A61F2250/0018—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 elasticity, stiffness or compressibility
    • 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
    • A61F2250/0023—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 porosity
    • 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

Definitions

  • the invention relates to a method for producing a metal cup which is implantable directly into the pelvic bone of a patient and is part of a hip joint prosthesis, with a permitted cup deformation by the elasticity of the pelvic bone in the loading state and the metal cups produced by this method.
  • the market has a variety of prosthetic systems for the replacement of the natural hip joint. These usually consist of a shaft 1 coupled to a ball head 2 and a metal pan 4 coupled with a pan insert 3. Shank 1 and metal pan 4 are connected to the body by ingrowth in the Oberschenkel construction.
  • the ball head 2 is rotatably mounted in the cup of the cup insert 3 - degree of freedom: 1 (see Figure 1).
  • Metal pans are coupled to the pelvic bone by various techniques during the primary fixation operation.
  • a common type of fixation is the clamping of the metal cup by means of pressfit. This represents a form of coupling which in the technical sense is attributable to the oversize connections, i. the external geometry of the metal cup is greater than the cup holder created by the doctor by milling out the acetabulum. The thus acting after the introduction of the pan from the pelvic bone on the pan normal forces and consequently frictional forces ensure the primary anchoring of the metal pan.
  • the deformation of the pan can lead to an increased risk of the formation of stripe-wear, which is a possible cause of the occurrence of the squeaking phenomenon.
  • the invention has for its object to improve a method according to the preamble of claim 1 so that asymmetric deformations of the metal pan are compensated by the elasticity of the pelvic bone in the load state. Furthermore, a metal pan is to be specified, which is produced by this method.
  • the metal pan is provided with a thick-walled, porous outer coating whose stiffness is adjusted so that the layer collapses in the load state when a voltage corresponding to the permitted pan deformation is exceeded.
  • asymmetrical deformations of the metal cup are compensated by the elasticity of the pelvic bone in the load state.
  • Collapse is understood to mean the collapse or breakage of the porous outer coating. This collapse takes place at the points of the porous outer coating, at which the permitted corresponding voltage is exceeded.
  • a pan deformation therefore means the deformation of the metal pan.
  • the porous outer coating is realized with a closed-pore structure, which collapses when the metal pan is inserted into the pelvic bone when the corresponding tension is exceeded. However, the fragments remain within the structure so that there is no inflammatory risk.
  • the porous outer coating is realized with an open-pore structure, which collapses during the introduction of the metal pan in the pelvic bone when the corresponding voltage is exceeded. This collapse is to be understood as a plastic deformation. There are no free fragments. The pelvic bone can grow into the remaining pores of the biocompatible material.
  • the porous outer coating can be realized with areas with a closed-pore structure and with areas with an open-pore structure.
  • the outer coating is produced in an inventive embodiment with a thickness of at least 0.1 mm, preferably with a thickness of at least 0.5 mm.
  • a metal cup according to the invention for direct implantation into the pelvic bone of a patient, as part of a hip joint prosthesis, produced in particular by the method described, is characterized in that the metal cup has a thick-walled, porous outer coating which has a closed-pore and / or open-pore structure.
  • the metal pan can compensate for asymmetrical deformations due to the elasticity of the pelvic bone in the loaded state.
  • the thickness of the porous outer coating is at least 0.1 mm, preferably at least 0.5 mm. - A -
  • FIG. 1 shows the state of the art.
  • a hip prosthesis usually consists of a shaft 1, the shaft head 7 is coupled to a ball head 2 and a metal pan 4 coupled with a pan insert 3.
  • Shank 1 and metal pan 4 are connected to the body of the patient by ingrowth in the femoral 20 and Connected pelvic bone 21 and are carriers for the ball head 2 and Pfannendon 3.
  • the ball head 2 is rotatably mounted in the calotte of the socket insert 3.
  • FIG. 2 shows a metal pan 4 according to the invention, which is provided with a thick-walled, porous outer coating 5. Their stiffness is adjusted so that the outer coating 5 collapses in the load state when a voltage corresponding to the permitted ladle deformation is exceeded.
  • the metal pan 4 shown in FIG. 2 has a porous outer coating 5 with a closed-pored structure which collapses when the metal pan 4 is inserted into the pelvic bone 21 when the corresponding voltage is exceeded.
  • FIG. 3 likewise shows a metal pan 4 according to the invention, which is provided with a thick-walled, porous outer coating 5. Their stiffness is adjusted so that the outer coating 5 collapses in the load state when a voltage corresponding to the permitted ladle deformation is exceeded.
  • the metal pan 4 shown in Figure 3 has a porous outer coating 5 with an open-pore structure, which collapses during insertion of the metal pan 4 in the pelvic bone 21 when the corresponding voltage is exceeded.

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

L'invention concerne un procédé de fabrication d'une coque métallique (4) qui peut être implantée directement dans l'os de la hanche (21) d'un patient et qui fait partie d'une prothèse d'articulation de la hanche, avec déformation tolérée de la coque sous l'action de l'élasticité de l'os de la hanche (21), en sollicitation. Afin de compenser les déformations asymétriques de la coque métallique dues à l'élasticité de l'os de la hanche, lorsqu'il est sollicité, il est proposé selon l'invention de doter la coque métallique (4) d'un revêtement extérieur (5)poreux épais dont la rigidité est ajustée de façon qu'en sollicitation, la couche s'affaisse en cas de dépassement d'une contrainte correspondant à la déformation tolérée de la coque.
PCT/EP2007/058129 2006-08-04 2007-08-06 Coque métallique à enveloppe extérieure poreuse, utilisée pour réduire les déformations de coque dans des cas d'ajustement serré Ceased WO2008015290A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102006036878.9 2006-08-04
DE102006036878 2006-08-04
DE102007031670.6 2007-07-06
DE102007031670.6A DE102007031670B4 (de) 2006-08-04 2007-07-06 Poröse Außenhülle von Metallpfannen zur Verringerung von Pfannendeformationen in Pressfit-Situationen

Publications (1)

Publication Number Publication Date
WO2008015290A1 true WO2008015290A1 (fr) 2008-02-07

Family

ID=38740322

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/058129 Ceased WO2008015290A1 (fr) 2006-08-04 2007-08-06 Coque métallique à enveloppe extérieure poreuse, utilisée pour réduire les déformations de coque dans des cas d'ajustement serré

Country Status (2)

Country Link
DE (1) DE102007031670B4 (fr)
WO (1) WO2008015290A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4056152A1 (fr) 2020-11-12 2022-09-14 Common Sense Engineering and Consult B.V. Implant acetabulaire et procede de deformation de ce implant

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2127843A1 (de) * 1970-06-04 1971-12-16 Ontario Research Foundation, Onta no (Kanada) Metallische Implantate
EP0145339A2 (fr) * 1983-11-25 1985-06-19 Vitek Inc. Prothèse cotyloidienne
US4778474A (en) * 1984-11-16 1988-10-18 Homsy Charles A Acetabular prosthesis
WO2001085068A1 (fr) * 2000-05-08 2001-11-15 Universität Heidelberg Partie d'endoprothese pour le remplacement d'articulations, utilisation et procede de fabrication de ladite partie
DE10022162A1 (de) * 2000-05-09 2001-11-22 Deutsch Zentr Luft & Raumfahrt Zementfreies Implantat und Verfahren zur Herstellung eines zementfreien Implantats
WO2006007861A1 (fr) * 2004-07-16 2006-01-26 Universität Duisburg-Essen Implant

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5879398A (en) * 1995-02-14 1999-03-09 Zimmer, Inc. Acetabular cup
US20060100716A1 (en) * 2002-06-27 2006-05-11 Reto Lerf Open-pored metal coating for joint replacement implants and method for production thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2127843A1 (de) * 1970-06-04 1971-12-16 Ontario Research Foundation, Onta no (Kanada) Metallische Implantate
EP0145339A2 (fr) * 1983-11-25 1985-06-19 Vitek Inc. Prothèse cotyloidienne
US4778474A (en) * 1984-11-16 1988-10-18 Homsy Charles A Acetabular prosthesis
WO2001085068A1 (fr) * 2000-05-08 2001-11-15 Universität Heidelberg Partie d'endoprothese pour le remplacement d'articulations, utilisation et procede de fabrication de ladite partie
DE10022162A1 (de) * 2000-05-09 2001-11-22 Deutsch Zentr Luft & Raumfahrt Zementfreies Implantat und Verfahren zur Herstellung eines zementfreien Implantats
WO2006007861A1 (fr) * 2004-07-16 2006-01-26 Universität Duisburg-Essen Implant

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4056152A1 (fr) 2020-11-12 2022-09-14 Common Sense Engineering and Consult B.V. Implant acetabulaire et procede de deformation de ce implant
US12144736B2 (en) 2020-11-12 2024-11-19 Common Sense Engineering And Consult B.V. Acetabular implant and method for deforming this implant

Also Published As

Publication number Publication date
DE102007031670A1 (de) 2008-02-14
DE102007031670B4 (de) 2017-08-31

Similar Documents

Publication Publication Date Title
DE69728001T2 (de) Prothese mit veränderbarer Passungs- und Spannungsverteilung
DE69228190T2 (de) Femorales hüftimplantat mit verringerter steifheit
EP2049046B1 (fr) Conception asymétrique de cotyles de la hanche pour réduire les déformations cotyloïdes
EP2079403A1 (fr) Ensemble de réalisation d'un implant de coiffe de tête d'articulation à restructuration de surface décalée pour articulation de hanche artificielle
EP3111892B1 (fr) Implant et procédé de revêtement d'un corps de base d'implant
DE102010044571A1 (de) Basisimplantat
EP3416594B1 (fr) Implant pour la reconstruction d'une acétabule et de partie du bassin
EP1168989B1 (fr) Prothese de tete d'articulation et pieces necessaires a sa realisation
EP0634157A1 (fr) Prothèse partielle pour disques intervertébraux
WO2000045749A1 (fr) Cotyle avec element d'accouplement entre la coquille cotyloidienne et l'insert cotyloidien
WO2001085068A1 (fr) Partie d'endoprothese pour le remplacement d'articulations, utilisation et procede de fabrication de ladite partie
WO2002064066A2 (fr) Cotyle implantable pour des endoprotheses de l'articulation de la hanche
DE102007031670B4 (de) Poröse Außenhülle von Metallpfannen zur Verringerung von Pfannendeformationen in Pressfit-Situationen
DE19517843B4 (de) Elastischer Kugelkopf für Hüftgelenkimplantate
DE102020116929A1 (de) Endoprothese, Verfahren zu deren Herstellung und Verwendung einer Endoprothese
EP2066265A2 (fr) Implant de hanche et module pour implant de hanche
WO2007082810A2 (fr) Cupule de révision modulaire pour chirurgie endoprothétique de l'articulation de la hanche et chevilles d'ancrage associées
DE69314807T2 (de) Positioniereinrichtung für totale hüftprothese
DE102007031672B4 (de) Kugelkopf mit Abflachungen zur Vermeidung von Trockenlauf eines künstlichen Hüftgelenkes
WO1996015735A1 (fr) Tete spherique elastique pour implants d'articulation de la hanche
EP1753477B1 (fr) Endoprothese de l'articulation de la hanche, pourvue d'un manchon en plastique biocompatible
DE102004027659B4 (de) Hüftgelenk-Endoprothese
DE102008064176B4 (de) Polyaxial ausrichtbares zapfenförmiges Stabilisierungselement für Endoprothesen
DE102010028430B4 (de) Implantat als Knochenersatz mit einer seine Oberfläche zumindest teilweise bedeckenden offenmaschigen, dreidimensionalen Raumnetzstruktur
EP2153800B1 (fr) Articulation artificielle

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07802508

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

NENP Non-entry into the national phase

Ref country code: RU

122 Ep: pct application non-entry in european phase

Ref document number: 07802508

Country of ref document: EP

Kind code of ref document: A1