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FR2720268A1 - Femoral post=operative prosthesis shank - Google Patents

Femoral post=operative prosthesis shank Download PDF

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Publication number
FR2720268A1
FR2720268A1 FR9406638A FR9406638A FR2720268A1 FR 2720268 A1 FR2720268 A1 FR 2720268A1 FR 9406638 A FR9406638 A FR 9406638A FR 9406638 A FR9406638 A FR 9406638A FR 2720268 A1 FR2720268 A1 FR 2720268A1
Authority
FR
France
Prior art keywords
femoral stem
cement
grooves
piston
stem
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.)
Granted
Application number
FR9406638A
Other languages
French (fr)
Other versions
FR2720268B1 (en
Inventor
Pierre Geoffrey Deaux
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.)
IMPLANTS ORTHOPEDIQUES TOUTES
Original Assignee
IMPLANTS ORTHOPEDIQUES TOUTES
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 IMPLANTS ORTHOPEDIQUES TOUTES filed Critical IMPLANTS ORTHOPEDIQUES TOUTES
Priority to FR9406638A priority Critical patent/FR2720268B1/en
Publication of FR2720268A1 publication Critical patent/FR2720268A1/en
Application granted granted Critical
Publication of FR2720268B1 publication Critical patent/FR2720268B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7097—Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants
    • A61B17/7098—Stabilisers comprising fluid filler in an implant, e.g. balloon; devices for inserting or filling such implants wherein the implant is permeable or has openings, e.g. fenestrated screw
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/88—Osteosynthesis instruments; Methods or means for implanting or extracting internal or external fixation devices
    • A61B17/8802—Equipment for handling bone cement or other fluid fillers
    • 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
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    • 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
    • A61F2/48—Operating or control means, e.g. from outside the body, control of sphincters
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    • A61B50/00—Containers, covers, furniture or holders specially adapted for surgical or diagnostic appliances or instruments, e.g. sterile covers
    • A61B50/30—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments
    • A61B2050/3015—Containers specially adapted for packaging, protecting, dispensing, collecting or disposing of surgical or diagnostic appliances or instruments transparent
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/062—Measuring instruments not otherwise provided for penetration depth
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    • 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
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    • 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
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    • A61F2/02—Prostheses implantable into the body
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    • A61F2/36—Femoral heads ; Femoral endoprostheses
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    • 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
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    • A61F2/32—Joints for the hip
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    • A61F2/3662—Femoral shafts
    • A61F2/3676—Distal or diaphyseal parts of shafts
    • A—HUMAN NECESSITIES
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    • 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
    • A61F2002/30159—Concave polygonal shapes
    • A61F2002/30181—Y-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • 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
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    • 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
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    • 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
    • A61F2002/30326—The prosthesis having different structural features at different locations within the same prosthesis differing in height or in length
    • A—HUMAN NECESSITIES
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    • 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
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    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
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    • 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
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    • 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
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    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
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    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
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    • 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
    • A61F2002/3678—Geometrical features
    • A61F2002/368—Geometrical features with lateral apertures, bores, holes or openings, e.g. for reducing the mass, for receiving fixation screws or for communicating with the inside of a hollow 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2002/3678—Geometrical features
    • A61F2002/3694—Geometrical features with longitudinal bores
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools for implanting artificial joints
    • A61F2002/4631—Special tools for implanting artificial joints the prosthesis being specially adapted for being cemented
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/006—Y-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • 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
    • A61F2250/0037—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 height or in length
    • 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
    • A61F2250/0058—Additional features; Implant or prostheses properties not otherwise provided for
    • A61F2250/0096—Markers and sensors for detecting a position or changes of a position of an implant, e.g. RF sensors, ultrasound markers
    • A61F2250/0097—Visible markings, e.g. indicia
    • 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
    • A61F2310/00395—Coating or prosthesis-covering structure made of metals or of alloys
    • A61F2310/00407—Coating made of titanium or of Ti-based alloys
    • 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

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

Abstract

The shank (2) has a lengthwise channel (7) passing through it from end to end and equipped at its upper end with a connection (8) for an injector cannula (29). The lengthwise channel is connected, adjacent to the lower end of the shank, to a series of radial channels (10) with their outlets situated in lengthwise grooves (12) in the shank's outer surface. The outer surface grooves extend over the lower third of the shank; they reduce in depth towards the shank's upper end, and they are three in number, situated 120 degrees apart. The upper third of the shank is coated with a layer of material which promotes bone growth, such as titanium and hydroxyapatite.

Description

L'invention est relative à une tige fémorale pour prothèse de hanche, fixable au ciment et à un appareil d'injection pour sa fixation. The invention relates to a femoral stem for hip prosthesis, fixable with cement and to an injection device for fixing it.

Depuis l'origine des prothèses de hanche, il est connu de fixer la tige fémorale dans le canal diaphysaire en interposant. entre la paroi du canal et la prothèse, une couche de ciment. Ce ciment est mis en place par le haut et bourré dans le canal au moins sur une hauteur correspondant à la longueur de la tige fémorale. La pression exercée sur la diaphyse par la mise en place du ciment et celle engendrée par l'introduction de la tige fémorale dans son logement ont une action traumatisante pouvant être dangereuse pour le patient. Since the origin of hip prostheses, it has been known to fix the femoral stem in the diaphyseal canal by interposing. between the canal wall and the prosthesis, a layer of cement. This cement is placed from the top and stuffed into the canal at least over a height corresponding to the length of the femoral stem. The pressure exerted on the diaphysis by the placement of the cement and that generated by the introduction of the femoral stem in its housing have a traumatic action which can be dangerous for the patient.

Par ailleurs, le ciment qui est chassé. lors de l'introduction de la tige fémorale dans le canal diaphysaire et au-dessous de la tige peut entraîner des incidents postopératoires et par exemple des embolies. Pour remédier à cela, il est connu de réaliser des prothèses posables sans ciment et comportant. sur leurs faces destinées à venir en contact avec le corps spongieux. des matériaux favorisant l'ostéogenèse, tel que de l'hydroxyapatite.  By the way, the cement that is driven out. during the introduction of the femoral stem into the diaphyseal canal and below the stem can lead to postoperative incidents and for example embolism. To remedy this, it is known to make implantable prostheses without cement and comprising. on their faces intended to come into contact with the spongy body. materials promoting osteogenesis, such as hydroxyapatite.

Toutefois, ce type de prothèse ne peut pas être utilisé pour les personnes âgées ou déficientes ayant une repousse osseuse plus lente car, quel que soit le soin apporté à la réalisation du logement de réception de la tige fémorale pour que le jeu entre le logement et la tige soit le plus réduit possible. les efforts et mouvements communiqués à cette tige fémorale entraînent, dans le temps, un agrandissement du logement favorisant les mouvements de cette tige et s'opposant à la repousse osseuse.However, this type of prosthesis cannot be used for elderly or deficient people with slower bone regrowth because, regardless of the care taken in achieving the housing for receiving the femoral stem so that the play between the housing and the stem is as small as possible. the forces and movements communicated to this femoral stem lead, over time, to an enlargement of the housing promoting the movements of this stem and opposing bone regrowth.

La présente invention a pour but de remédier à ces inconvénients en fournissant une tige fémorale se fixant au ciment, en supprimant tous risques post-opératoires et toutes douleurs. The object of the present invention is to remedy these drawbacks by providing a femoral stem which is fixed to the cement, by eliminating all post-operative risks and all pain.

A cet effet, la tige fémorale selon l'invention comporte, d'une part, un canal d'injection de ciment la traversant longitudinalement de part en part et muni, à son extrémité supérieure, de moyens de raccordement à un appareil d'injection de ciment, et, d'autre part, à proximité de son extrémité inférieure. plusieurs séries superposées de canaux radiaux débouchant dans des gorges longitudinales extérieures. To this end, the femoral stem according to the invention comprises, on the one hand, a cement injection channel passing through it longitudinally right through and provided, at its upper end, with means for connection to an injection device. cement, and, on the other hand, near its lower end. several superimposed series of radial channels opening into external longitudinal grooves.

Pour sceller la tige fémorale. il suffit. après sa mise en place définitive dans le logement préalablement réalisé dans le canal diaphysaire, d'injecter le ciment dans son canal longitudinal. Cette injection conduit le ciment exclusivement à l'extrémité inférieure de la tige. La quantité de ciment injecté est dosé de manière à éviter tout excès s'échappant inutilement dans le canal diaphysaire, au-dessous de la tige, et la pression d'injection est réglée pour favoriser la distribution du ciment dans les gorges et autour de la tige, sans engendrer une pression excessive sur la diaphyse. Lorsque les gorges sont remplies, le ciment s'insinue entre la tige et son logement. en fonction du jeu disponible et assure l'autocentrage et le positionnement de son extrémité inférieure.  To seal the femoral stem. it is enough. after its final placement in the housing previously made in the diaphyseal canal, inject the cement into its longitudinal channel. This injection leads the cement exclusively to the lower end of the rod. The quantity of cement injected is dosed so as to avoid any excess escaping unnecessarily in the diaphyseal canal, below the rod, and the injection pressure is adjusted to favor the distribution of the cement in the grooves and around the rod, without creating excessive pressure on the diaphysis. When the grooves are filled, the cement creeps between the rod and its housing. depending on the play available and ensures self-centering and positioning of its lower end.

A la fin de l'injection, le ciment entoure uniquement l'extrémité inférieure de la tige en formant une couche de faible épaisseur. suffisante pour assurer la liaison mais insuffisante pour créer des incidents post-opératoires. At the end of the injection, the cement surrounds only the lower end of the rod, forming a thin layer. sufficient to ensure liaison but insufficient to create post-operative incidents.

Par ailleurs, le ciment disposé dans les gorges forme des crans calant la tige, en rotation et en translation verticale. et s'opposant donc à tout mouvement, ce qui favorise l'ostéogenèse. Furthermore, the cement placed in the grooves forms notches wedging the rod, in rotation and in vertical translation. and therefore opposing any movement, which promotes osteogenesis.

Avantageusement, la tige fémorale est revêtue, au moins sur son tiers supérieur, d'une couche de titane et d'hydroxyapatite, afin de favoriser l'ostéogenèse et compléter ensuite la fixation assurée en partie inférieure. Advantageously, the femoral stem is coated, at least on its upper third, with a layer of titanium and hydroxyapatite, in order to promote osteogenesis and then complete the fixation ensured in the lower part.

L'invention vise aussi l'appareil d'injection pour la fixation de la prothèse. The invention also relates to the injection device for fixing the prosthesis.

Cet appareil comprend un corps tubulaire dont une extrémité est munie de moyens de raccordement à une source de gaz sous pression et dont l'autre extrémité, formant embout, est aménagée pour recevoir et caler une cartouche amovible, ce corps contenant, dans une chambre interne communiquant avec les moyens de raccordement, un piston, mobile longitudinalement et solidaire d'une tige axiale de poussée, tandis que la cartouche amovible, contenant le ciment comporte. côté corps, un bouchon qui, formant piston interne, a un plus petit diamètre que celui du corps et est apte à recevoir la poussée de la tige de ce piston, et, à son extrémité libre. une canule d'injection munie de moyens de raccordement, complémentaires de ceux du canal longitudinal de la tige fémorale. This device comprises a tubular body, one end of which is provided with means for connection to a source of pressurized gas and the other end of which, forming a nozzle, is designed to receive and wedge a removable cartridge, this body containing, in an internal chamber. communicating with the connection means, a piston, movable longitudinally and integral with an axial push rod, while the removable cartridge, containing the cement comprises. body side, a plug which, forming an internal piston, has a smaller diameter than that of the body and is capable of receiving the thrust from the rod of this piston, and, at its free end. an injection cannula provided with connection means, complementary to those of the longitudinal channel of the femoral stem.

Lorsque la canule d'injection est raccordée à l'extrémité supérieure du canal d'injection de la tige fémorale, l'introduction de gaz sous pression dans la chambre interne du corps de l'appareil d'injection provoque le déplacement du piston déposé dans cette chambre, et, par l'intermédiaire de la tige de ce piston, le déplacement du piston de plus petit diamètre constituant bouchon de la cartouche de ciment. Le recours à deux pistons de diamètres différents permet, à partir d'une pression de gaz ayant une valeur relativement faible, d'obtenir sur le piston d'injection chassant le ciment, un effort suffisant pour vaincre la viscosité de ce ciment. Cela permet aussi de créer, entre les deux pistons, une chambre intermédiaire évitant que le gaz, créant l'énergie d'injection, puisse pénétrer dans la cartouche avec le risque d'être injecté dans la tige fémorale. When the injection cannula is connected to the upper end of the injection channel of the femoral stem, the introduction of pressurized gas into the internal chamber of the body of the injection device causes the piston deposited in this chamber, and, via the rod of this piston, the displacement of the piston of smaller diameter constituting plug of the cement cartridge. The use of two pistons of different diameters makes it possible, from a gas pressure having a relatively low value, to obtain on the injection piston driving out the cement, sufficient effort to overcome the viscosity of this cement. This also makes it possible to create, between the two pistons, an intermediate chamber preventing the gas, creating the injection energy, from being able to penetrate into the cartridge with the risk of being injected into the femoral stem.

D'autres caractéristiques et avantages ressortiront de la description qui suit en référence au dessin schématique annexé représentant à titre d'exemple une forme d'exécution de cette tige fémorale et de l'appareil pour sa fixation. Other characteristics and advantages will emerge from the description which follows with reference to the appended schematic drawing showing by way of example an embodiment of this femoral stem and of the device for its fixing.

Figure 1 est une vue de côté en élévation de la tige fémorale,
Figure 2 en est une vue en coupe suivant II-II de figure 1,
Figure 3 est une vue en coupe longitudinale de la tige, lorsqu'elle est mise en place dans le col du fémur et lors de l'injection de son ciment de scellement,
Figure 4 est une vue de côté en coupe montrant une forme d'exécution de l'appareil pour l'injection du ciment dans la tige fémorale. FIG. 1 is a side view in elevation of the femoral stem,
Figure 2 is a sectional view along II-II of Figure 1,
FIG. 3 is a view in longitudinal section of the rod, when it is placed in the neck of the femur and during the injection of its sealing cement,
Figure 4 is a side view in section showing an embodiment of the apparatus for injecting cement into the femoral stem.

Comme montré aux figures 1 et 3. la tige fémorale est composée d'un corps 2 destiné à être engagé dans un logement 3 réalisé dans le canal diaphysaire du fémur 4 et d'un col 5 incliné par rapport à l'axe longitudinal de son corps et comportant une portée conique 6, de réception d'une tête fémorale hémisphérique (non représentée). As shown in Figures 1 and 3. the femoral stem is composed of a body 2 intended to be engaged in a housing 3 made in the diaphyseal canal of the femur 4 and of a neck 5 inclined relative to the longitudinal axis of its body and having a conical bearing 6, for receiving a hemispherical femoral head (not shown).

Selon l'invention. le corps de la tige fémorale est traversé longitudinalement et de part en part par un canal 7. La partie supérieure de ce canal est munie de moyens de raccordement, tel qu'un puits taraudé 8. avec un appareil d'injection de ciment 9 (figure 4). According to the invention. the body of the femoral stem is traversed longitudinally and right through by a channel 7. The upper part of this channel is provided with connection means, such as a tapped well 8. with a cement injection device 9 ( figure 4).

A son extrémité inférieure, le canal 7 communique avec plusieurs séries superposées de canaux radiaux 10 débouchant à l'extérieur. Plus précisément, comme montré sur les figures 2 et 3, ces canaux 10 débouchent dans des gorges longitudinales et extérieures 12. Dans la forme d'exécution représentée. ces gorges sont au nombre de trois et sont réparties à 1200 les unes par rapport aux autres. Elles délimitent entre elles des zones d'appui diaphysaires 13.At its lower end, the channel 7 communicates with several superimposed series of radial channels 10 opening to the outside. More specifically, as shown in Figures 2 and 3, these channels 10 open into longitudinal and external grooves 12. In the embodiment shown. these grooves are three in number and are distributed at 1,200 with respect to each other. They delimit between them diaphyseal support zones 13.

Suivant une caractéristique de l'invention. les gorges sont réparties de manière que l'une de ses zones d'appui diaphysaire 13. et en particulier celle 13a aux figures 2 et 3, soit du côté de la tige qui est opposé au côté comportant le col 5, de manière à obtenir, dans cette partie de la tige, un bon appui sur la diaphyse. According to a characteristic of the invention. the grooves are distributed so that one of its diaphyseal support zones 13. and in particular that 13a in FIGS. 2 and 3, is on the side of the rod which is opposite to the side comprising the neck 5, so as to obtain , in this part of the stem, a good support on the diaphysis.

Les gorges 12 s'étendent verticalement sur. sensiblement, le tiers inférieur de la tige et ont une profondeur qui va en décroissant, en allant vers l'extrémité supérieure de la tige. The grooves 12 extend vertically over. substantially, the lower third of the rod and have a depth which decreases, going towards the upper end of the rod.

Dans une autre caractéristique de l'invention, le tiers supérieur du corps 2 de cette tige est recouvert extérieurement par une couche 1 1 de matériau favorisant l'ostéogenèse et, par exemple, par une couche de titane et d'hydroxyapatite. In another characteristic of the invention, the upper third of the body 2 of this rod is covered externally by a layer 1 1 of material promoting osteogenesis and, for example, by a layer of titanium and hydroxyapatite.

L'appareil d'injection de ciment est essentiellement composé d'un corps tubulaire 16 et d'une cartouche 17, amovible et interchangeable. Le corps 16 comporte une chambre interne 18 dans laquelle peut se mouvoir un piston 19, solidaire d'une tige axiale 20. La partie côté piston de la chambre 18 communique par un canal 22 avec des moyens 23 de raccordement à une source de gaz comprimée, et par exemple, avec un embout 24 de raccordement au réseau de gaz comprimé à la salle d'opération. The cement injection device is essentially composed of a tubular body 16 and a cartridge 17, removable and interchangeable. The body 16 comprises an internal chamber 18 in which a piston 19 can move, integral with an axial rod 20. The piston side part of the chamber 18 communicates by a channel 22 with means 23 for connection to a source of compressed gas , and for example, with a nozzle 24 for connection to the compressed gas network in the operating room.

Dans une variante d'exécution, non représentée, ces moyens permettent le raccordement à une cartouche de gaz sous pression tel que du gaz carbonique. In an alternative embodiment, not shown, these means allow connection to a cartridge of pressurized gas such as carbon dioxide.

Le canal 22 est associé à des moyens 25 de fermeture et de régulation du débit ou de la pression du gaz injecté. A son autre extrémité. le corps 16 de l'appareil est muni d'un embout 26 apte à positionner et caler le corps de la cartouche 17. The channel 22 is associated with means 25 for closing and regulating the flow rate or the pressure of the injected gas. At its other end. the body 16 of the apparatus is provided with a nozzle 26 capable of positioning and wedging the body of the cartridge 17.

Dans la forme d'exécution représentée. cette cartouche est composée d'un corps tubulaire 1 7a contenant le ciment 27 et dont l'extrémité supérieure est obturée par un bouchon 28, tandis que l'extrémité antérieure est constituée par une canule 29. Le bouchon 28 comporte une cuvette 28a pour l'appui de l'extrémité hémisphérique de la tige 20 du piston 19. On notera que le diamètre du bouchon 28 destiné à former piston est inférieur au diamètre du piston 19. In the embodiment shown. this cartridge is composed of a tubular body 1 7a containing the cement 27 and the upper end of which is closed by a plug 28, while the front end is constituted by a cannula 29. The plug 28 comprises a bowl 28a for the support of the hemispherical end of the rod 20 of the piston 19. It will be noted that the diameter of the plug 28 intended to form the piston is less than the diameter of the piston 19.

La canule 29 est munie à son extrémité libre de moyens de raccordement 30, complémentaires des moyens de raccordement 8 ménagés à la partie supérieure du canal 7 de la tige fémorale. Dans la forme d'exécution représentée. ces moyens sont constitués par un filetage 30. The cannula 29 is provided at its free end with connection means 30, complementary to the connection means 8 formed at the upper part of the channel 7 of the femoral stem. In the embodiment shown. these means consist of a thread 30.

Enfin, l'extrémité postérieure de la cartouche 17 est fixée à l'embout 26 du corps de l'appareil par coopération d'ergots avec des rainures. Dans la forme d'exécution représentée, les ergots 32 font saillie radialement de la cartouche 17, tandis que l'embout 26 comporte des rainures longitudinales 33 avec des logements latéraux 34. Finally, the rear end of the cartridge 17 is fixed to the end-piece 26 of the body of the device by cooperation of pins with grooves. In the embodiment shown, the lugs 32 project radially from the cartridge 17, while the end piece 26 has longitudinal grooves 33 with lateral housings 34.

Le corps 16 de l'appareil comporte. à proximité de son embout 26, un ou plusieurs perçages radiaux 35 traversant sa paroi tubulaire et mettant la chambre 18 en communication avec l'extérieur. The body 16 of the device comprises. near its end piece 26, one or more radial holes 35 passing through its tubular wall and putting the chamber 18 in communication with the outside.

Lorsque la tige fémorale est positionnée définitivement dans le logement 3 du fémur, L'appareil d'injection de ciment est raccordé au puits fileté 8 du canal 7. Dès que le gaz sous pression est introduit dans la chambre 18. le piston 19 est déplacé dans le sens de la flèche 21 et, par sa tige. communique au bouchon 28 formant piston, un effort de même sens mais de valeur supérieure car multiplié dans le rapport entre les différences de section entre ces deux pistons. On notera que l'air contenu dans la chambre 18, contenant la tige 20 du piston 19, de même que le gaz de propulsion pour parvenir dans cette chambre, est chassé hors de celle-ci à travers les perforations 35. Cela supprime toute contrepression dans cette chambre et évite que des gaz toxiques. tel que le gaz carbonique puisse pénétrer dans la cartouche 17 avec le risque d'être injecté dans le canal 7 de la tige fémorale 2. When the femoral stem is definitively positioned in the housing 3 of the femur, the cement injection device is connected to the threaded well 8 of the channel 7. As soon as the pressurized gas is introduced into the chamber 18. the piston 19 is moved in the direction of arrow 21 and, by its rod. communicates to the plug 28 forming a piston, an effort of the same direction but of greater value because multiplied in the ratio between the differences in section between these two pistons. It will be noted that the air contained in the chamber 18, containing the rod 20 of the piston 19, as well as the propellant gas to reach this chamber, is expelled from it through the perforations 35. This eliminates any back pressure in this room and avoids that toxic gases. such that carbon dioxide can penetrate into the cartridge 17 with the risk of being injected into the channel 7 of the femoral stem 2.

Durant l'injection, il est possible de régler le débit et la pression du gaz, mais aussi de contrôler la quantité de ciment injecté. Ce contrôle peut, par exemple, être effectué en réalisant la cartouche dans un matériau transparent ou translucide pour laisser apparaître le bouchon 28 formant piston et en dotant ce corps de graduations 36 indiquant le volume de ciment injecté depuis l'origine du déplacement de ce bouchon. During the injection, it is possible to adjust the gas flow and pressure, but also to control the quantity of cement injected. This control can, for example, be carried out by making the cartridge in a transparent or translucent material to reveal the plug 28 forming a piston and by providing this body with graduations 36 indicating the volume of cement injected since the origin of the displacement of this plug. .

Sous la pression d'injection. le ciment provenant de la cartouche 17 circule dans le canal 7 de la tige fémorale et, par les canaux radiaux 10, se répand d'abord dans les gorges 12, puis tout autour de l'extrémité inférieure de la tige et sous l'extrémité inférieure de cette tige. On notera que, par leur forme et disposition, les gorges permettent de réaliser des plots d'ancrage, montrés en 37 à la figure 3. et s'opposant à toute rotation et extraction de la tige. Under injection pressure. the cement coming from the cartridge 17 circulates in the channel 7 of the femoral stem and, through the radial channels 10, spreads first in the grooves 12, then all around the lower end of the stem and under the end bottom of this rod. It will be noted that, by their shape and arrangement, the grooves make it possible to produce anchoring studs, shown at 37 in FIG. 3. and opposing any rotation and extraction of the rod.

Elles permettent aussi d'assurer l'autocentrage de la tige dans le logement par le ciment qui se répartit entre ce logement et les zones d'appui 13 de cette tige. They also make it possible to ensure the self-centering of the rod in the housing by the cement which is distributed between this housing and the support zones 13 of this rod.

A la fin de l'injection, l'appareil 9 est désolidarisé de la tige, sans qu'il soit besoin d'obturer le canal 7. puisque celui-ci est rempli de ciment.  At the end of the injection, the device 9 is detached from the rod, without it being necessary to close the channel 7. since the latter is filled with cement.

Ainsi mise en place la tige fémorale est parfaitement maintenue par son tiers inférieur scellé au ciment et ne peut donc pas être soumis à des mouvements relatifs par rapport au logement 3 la contenant. Il en résulte qu'elle occupe une position stable par rapport à ce logement, ce qui favorise l'ostéogenèse. même pour des personnes âgées ou déficientes. Par ailleurs, lorsque l'ostéogenèse est réalisée sur le tiers supérieur de cette tige, elle complète la fixation de la tige fémorale. Thus put in place the femoral stem is perfectly maintained by its lower third sealed with cement and therefore cannot be subjected to relative movements relative to the housing 3 containing it. As a result, it occupies a stable position relative to this housing, which promotes osteogenesis. even for elderly or deficient people. Furthermore, when osteogenesis is performed on the upper third of this stem, it completes the fixation of the femoral stem.

I1 ressort de ce qui précède que la tige fémorale selon l'invention apporte une solution originale à la fixation d'une tige fémorale. puisqu'elle combine une fixation au ciment, assurant une parfaite tenue mécanique. avec une fixation avec repousse osseuse, sans présenter les inconvénients habituels du scellement au ciment. I1 emerges from the above that the femoral stem according to the invention provides an original solution to the attachment of a femoral stem. since it combines fixing with cement, ensuring perfect mechanical strength. with fixation with bone regrowth, without having the usual disadvantages of cement cementation.

Bien qu'il soit plus commode d'utiliser l'appareil d'injection de ciment décrit précédemment, le scellement de la tige fémorale peut aussi être assuré par un appareil similaire mais dans lequel la pression de gaz est fournie par une pompe à main raccordée aux moyens de raccordement du corps de cet appareil ou inclus dans ce corps.  Although it is more convenient to use the cement injection device described above, the sealing of the femoral stem can also be ensured by a similar device but in which the gas pressure is supplied by a connected hand pump to the means of connection of the body of this apparatus or included in this body.

Claims (10)

REVENDICATIONS 1. Tige fémorale pour prothèse de hanche, caractérisée en ce qu'elle comporte, d'une part, un canal (7) d'injection de ciment la traversant longitudinalement de part en part et muni, à son extrémité supérieure, de moyens (8) de raccordement à un appareil (9) d'injection de ciment, et, d'autre part, à proximité de son extrémité inférieure, plusieurs séries superposées de canaux radiaux (10) débouchant de gorges longitudinales extérieures (12). 1. Femoral stem for hip prosthesis, characterized in that it comprises, on the one hand, a cement injection channel (7) passing through it longitudinally right through and provided, at its upper end, with means ( 8) for connection to an apparatus (9) for injecting cement, and, on the other hand, near its lower end, several superimposed series of radial channels (10) opening out from external longitudinal grooves (12). 2. Tige fémorale selon la revendication 1, caractérisée en ce que les gorges (12) sont réparties de manière que l'une (ira) des zones d'appui diaphysaire (13) qu'elles délimitent entre elles soit du côté de la tige fémorale qui est opposée à celui duquel fait saillie le col (5) de cette tige. 2. Femoral stem according to claim 1, characterized in that the grooves (12) are distributed so that one (will) of the diaphyseal support zones (13) which they delimit between them is on the side of the stem femoral which is opposite to that from which protrudes the neck (5) of this rod. 3. Tige fémorale selon l'une quelconque des revendications 1 et 2, caractérisée en ce que les gorges (12) s'étendent sur sensiblement le tiers inférieur de la tige. 3. Femoral stem according to any one of claims 1 and 2, characterized in that the grooves (12) extend over substantially the lower third of the stem. 4. Tige fémorale selon l'une quelconque des revendications 1 à 3, caractérisée en ce que les gorges (12) ont une profondeur qui va en décroissant en allant vers l'extrémité supérieure de la tige. 4. Femoral stem according to any one of claims 1 to 3, characterized in that the grooves (12) have a depth which decreases going towards the upper end of the stem. 5. Tige fémorale selon l'une quelconque des revendications 1 à 4, caractérisée en ce que les gorges (12) sont au nombre de trois et sont réparties à 1200.  5. Femoral stem according to any one of claims 1 to 4, characterized in that the grooves (12) are three in number and are distributed at 1200. 6. Tige fémorale selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'elle est revêtue, au moins sur son tiers supérieur, d'une couche (11) de titane et d'hydroxyapatite. 6. Femoral stem according to any one of claims 1 to 5, characterized in that it is coated, at least on its upper third, with a layer (11) of titanium and hydroxyapatite. 7. Appareil d'injection pour la mise en oeuvre de la tige fémorale selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend un corps tubulaire (16) dont une extrémité est munie de moyens (24) de raccordement à une source de gaz sous pression et dont l'autre extrémité, formant embout (26), est aménagée pour recevoir et caler une cartouche amovible (17), ce corps contenant, dans une chambre interne (18) communiquant avec les moyens de raccordement (24), un piston (19), mobile longitudinalement et solidaire d'une tige axiale de poussée (20), tandis que la cartouche amovible (17), contenant le ciment (27). comporte. côté corps (16), un bouchon (28) qui, formant piston interne, a un plus petit diamètre que celui du piston (19) du corps (16) et est apte à recevoir la poussée de la tige (20) de ce piston, et, à son extrémité libre, une canule d'injection (29) munie de moyens de raccordement (3 O), complémentaires de ceux (8) du canal (7) longitudinal de la tige fémorale (2). 7. Injection device for implementing the femoral stem according to any one of claims 1 to 6, characterized in that it comprises a tubular body (16), one end of which is provided with means (24) of connection to a source of gas under pressure and the other end of which, forming a nozzle (26), is arranged to receive and wedge a removable cartridge (17), this body containing, in an internal chamber (18) communicating with the means of connection (24), a piston (19), movable longitudinally and integral with an axial push rod (20), while the removable cartridge (17), containing the cement (27). behaves. body side (16), a plug (28) which, forming an internal piston, has a smaller diameter than that of the piston (19) of the body (16) and is capable of receiving the thrust from the rod (20) of this piston , and, at its free end, an injection cannula (29) provided with connection means (3 O), complementary to those (8) of the longitudinal channel (7) of the femoral stem (2). 8. Appareil selon la revendication 7. caractérisé en ce que l'extrémité de la canule (29) est munie d'un filetage externe (30) apte à être vissé dans un puits taraudé (7), ménagé à l'extrémité supérieure du canal longitudinal (7) de la tige fémorale (2). 8. Apparatus according to claim 7. characterized in that the end of the cannula (29) is provided with an external thread (30) capable of being screwed into a threaded well (7), formed at the upper end of the longitudinal channel (7) of the femoral stem (2). 9. Appareil selon l'une quelconque des revendications 7 et 8, caractérisé en ce que la liaison entre la cartouche (17) et l'embout (26) du corps (16) est assurée par coopération d'ergots radiaux (32) saillant de l'un de ces éléments avec des rainures longitudinales (33) munies de logements latéraux (34). ménagés dans l'autre élément. 9. Apparatus according to any one of claims 7 and 8, characterized in that the connection between the cartridge (17) and the tip (26) of the body (16) is provided by cooperation of projecting radial lugs (32) of one of these elements with longitudinal grooves (33) provided with lateral housings (34). spared in the other element. 10. Appareil selon l'une quelconque des revendications 7 à 9, caractérisé en ce que le canal (22) d'alimentation en gaz de la chambre (19) est muni d'un moyen de fermeture (25) avec moyen de régulation du débit et'ou de la pression du gaz injecté.  10. Apparatus according to any one of claims 7 to 9, characterized in that the channel (22) for supplying gas to the chamber (19) is provided with a closing means (25) with means for regulating the flow and / or pressure of the injected gas.
FR9406638A 1994-05-24 1994-05-24 Femoral stem for hip prosthesis. Expired - Fee Related FR2720268B1 (en)

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FR2795626A1 (en) * 1999-07-02 2001-01-05 Taloco Invest N V HIP PROSTHESIS WITH FEMALE COMPONENT AND COTYLOIDAL ELEMENT, WITH LARGE FACILITY OF IMPLANTATION
EP1090610A3 (en) * 1999-10-06 2001-11-21 Ngk Spark Plug Co., Ltd Assisting-tool for extruding a chemical agent, kneader for preparing and extruding a chemical agent, and methods for using the same
WO2002009627A1 (en) * 2000-07-29 2002-02-07 Coripharm Medizinprodukte Gmbh & Co. Kg Surgical element
WO2002100302A1 (en) * 2001-06-13 2002-12-19 Bomet Merck Gmbh Hip endoprosthesis
WO2003013383A1 (en) * 2001-08-08 2003-02-20 Wolfgang Dinkelacker Implant comprising a grooved structure
FR2831052A1 (en) * 2001-10-24 2003-04-25 Alain Durand Range of femoral rods comprises rod impacted into bone cavity with cement and rod impacted without cement, the cement impacted rod has central cavity for cement injection and its outward flow filling space between rod and bone
WO2007072445A3 (en) * 2005-12-21 2007-10-11 Univ Aveiro Combined fixation bone implant

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Publication number Priority date Publication date Assignee Title
FR2795626A1 (en) * 1999-07-02 2001-01-05 Taloco Invest N V HIP PROSTHESIS WITH FEMALE COMPONENT AND COTYLOIDAL ELEMENT, WITH LARGE FACILITY OF IMPLANTATION
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WO2003013383A1 (en) * 2001-08-08 2003-02-20 Wolfgang Dinkelacker Implant comprising a grooved structure
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WO2003034954A1 (en) * 2001-10-24 2003-05-01 Societe De Genie Medical S.G.M. Set of femoral stems fixed with a liquid injected through their center
WO2007072445A3 (en) * 2005-12-21 2007-10-11 Univ Aveiro Combined fixation bone implant

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