FR2668059A1 - Femoral implant - Google Patents

Femoral implant Download PDF

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Publication number
FR2668059A1
FR2668059A1 FR9013328A FR9013328A FR2668059A1 FR 2668059 A1 FR2668059 A1 FR 2668059A1 FR 9013328 A FR9013328 A FR 9013328A FR 9013328 A FR9013328 A FR 9013328A FR 2668059 A1 FR2668059 A1 FR 2668059A1
Authority
FR
France
Prior art keywords
rod
proximal part
section
femoral implant
ribs
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
FR9013328A
Other languages
French (fr)
Other versions
FR2668059B1 (en
Inventor
Dumont Paul
Braud Gerard
Schiffrine Patrick
Bost Joel
Paillot Jean-Michel
Machet Pierre
Revel Jean-Jacques
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ICP France
ICP SA
Original Assignee
ICP France
ICP SA
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 ICP France, ICP SA filed Critical ICP France
Priority to FR9013328A priority Critical patent/FR2668059B1/en
Publication of FR2668059A1 publication Critical patent/FR2668059A1/en
Application granted granted Critical
Publication of FR2668059B1 publication Critical patent/FR2668059B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/367—Proximal or metaphyseal parts of 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
    • 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
    • A61F2/3676—Distal or diaphyseal parts of 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
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A61F2002/30113—Rounded shapes, e.g. with rounded corners circular
    • 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
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A61F2002/30125—Rounded shapes, e.g. with rounded corners elliptical or oval
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30153—Convex polygonal shapes rectangular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30158—Convex polygonal shapes trapezoidal
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30182—Other shapes
    • A61F2002/30187—D-shaped or half-disc-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—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
    • A61F2/30767—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
    • A61F2002/30891—Plurality of protrusions
    • 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
    • A61F2002/30891—Plurality of protrusions
    • A61F2002/30892—Plurality of protrusions parallel
    • 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
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    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • 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
    • A61F2230/0017—Angular shapes
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    • A—HUMAN NECESSITIES
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    • 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
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    • 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

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

The femoral implant for a hip prosthesis, in the form of a shaft (1) intended to be introduced into the medullary cavity, is distinguished by the fact that the shaft has, in its proximal area (1a), and in the frontal plane, ribs (1b) which are suitably oriented in a radius of curvature (R1-R2) corresponding to the movement of introduction of the said shaft into the medullary cavity.

Description

Implant fémoral
L'invention concerne tout type de tige fémorale présentant de manière connue, un col latéralisé destiné à recevoir une tête sphérique destinée à coopérer avec la cavité-cotylolde de l'os illiaque.Femoral implant
The invention relates to any type of femoral stem having, in a known manner, a lateralized neck intended to receive a spherical head intended to cooperate with the acetabulum cavity of the iliac bone.

Selon l'invention, on a voulu améliorer les caractéristiques de la tige pour résoudre différents problèmes que l'on rencontre généralement soit au moment de la pose, soit ultérieurement. According to the invention, we wanted to improve the characteristics of the rod to solve different problems that are generally encountered either at the time of installation, or later.

Un des problèmes que se propose de résoudre l'invention est de faciliter l'introduction de l'élément fémoral de prothèse dans le canal médullaire, tout en facilitant son orientation angulaire, correspondant à un parfait remplissage métaphysaire. One of the problems which the invention proposes to solve is to facilitate the introduction of the femoral component of the prosthesis into the medullary canal, while facilitating its angular orientation, corresponding to perfect metaphyseal filling.

Un tel problème est résolu en ce que l'élément fémoral présente, dans sa partie proximale et dans le plan frontal, des nervures convenablement orientées selon un rayon de courbure correspondant au mouvement d'introduction dans le canal médullaire. Such a problem is solved in that the femoral element has, in its proximal part and in the frontal plane, ribs suitably oriented according to a radius of curvature corresponding to the movement of introduction into the medullary canal.

Un autre problème que se propose de résoudre l'invention est d'assurer une parfaite stabilité métaphysaire ainsi qu'un ancrage optimum. Another problem which the invention proposes to solve is to ensure perfect metaphyseal stability as well as optimum anchoring.

Un tel problème est résolu en ce que les nervures sont formées en relief en relief de chacune des faces interne et externe de la partie proximale de la tige. Such a problem is solved in that the ribs are formed in relief in relief on each of the internal and external faces of the proximal part of the rod.

Un autre problème que se propose de résoudre l'invention est de parfaitement adapter la tige au profil de la cavité médullaire du fémur. Another problem which the invention proposes to solve is to adapt the rod perfectly to the profile of the medullary cavity of the femur.

Pour résoudre ce problème, la tige est de section dégressive dans le plan frontal et sagittal depuis sa partie proximale jusqu a son extrémité distale, avec une section méplate à bords arrondis au niveau de sa partie proximale, ladite section se raccordant progressivement jusqu a une section ronde au niveau de son extrémité distale. To solve this problem, the rod has a tapering section in the frontal and sagittal plane from its proximal part to its distal end, with a flat section with rounded edges at its proximal part, said section gradually connecting to a section. round at its distal end.

L'invention est exposée ci-après plus en détail à l'aide des dessins annexés, dans lesquels
La figure 1 est une vue de la tige considérée dans le plan frontal.The invention is set out below in more detail with the aid of the appended drawings, in which
Figure 1 is a view of the rod considered in the frontal plane.

La figure 2 est une vue en coupe transversale considérée selon la ligne 2-2 de la figure 1.  Figure 2 is a cross-sectional view taken along line 2-2 of Figure 1.

Les figures 3, 4, 5, 6, 7 et 8 sont des vues en coupe transversale considérées respectivement selon les lignes 3-3, 4-4, 5-5, 6-6, 7-7 et 8-8 de la figure 2. Figures 3, 4, 5, 6, 7 and 8 are cross-sectional views taken respectively along lines 3-3, 4-4, 5-5, 6-6, 7-7 and 8-8 of the figure 2.

Comme le montre la figure 1, la tige fémorale (i) présente dans sa partie proximale (la) et dans le plan frontal, sur chacune de ses faces interne et externe, des nervures (lb). Selon une caractéristique à la base de 1 invention, ces nervures (lb) sont respectivement orientées selon un rayon de courbure (Rl-R2) déterminé pour correspondre au mouvement d'introduction de l'ensemble de la tige dans le canal médullaire. Ces nervures sont formées en relief de chacune des faces interne et externe de la partie proximale de la tige (figure 2). As shown in Figure 1, the femoral stem (i) has in its proximal part (la) and in the frontal plane, on each of its internal and external faces, ribs (lb). According to a characteristic at the base of 1 invention, these ribs (lb) are respectively oriented according to a radius of curvature (Rl-R2) determined to correspond to the movement of introduction of the entire rod into the medullary canal. These ribs are formed in relief on each of the internal and external faces of the proximal part of the rod (Figure 2).

On prévoit, d'une manière connue, de déposer, au niveau de la partie proximale de la tige, une couche de titane poreux sous forme de plasma spray. Avantageusement, cette couche de titane poreux peut être intégrée dans l'épaisseur de la prothèse. In a known manner, provision is made to deposit, at the proximal part of the rod, a layer of porous titanium in the form of plasma spray. Advantageously, this layer of porous titanium can be integrated into the thickness of the prosthesis.

Suivant une autre caractéristique, la tige (i) est de section dégressive dans le plan frontal et dans plan sagittal depuis son extrémité proximale jusqu a son extrémité distale. According to another characteristic, the rod (i) has a tapering section in the frontal plane and in the sagittal plane from its proximal end to its distal end.

Au niveau de sa partie proximale, la section de la tige est très sensiblement méplate, avec des bords arrondis (figure 3). Cette section se raccorde progressivement jusqu a une section ronde au niveau de l'extrémité distale de la tige (figure 8). On renvoie aux figures 4, 5, 6 et 7 qui montrent ce changement progressif de section. A noter que la tige (i) présente du coté interne, quelle que soit sa forme en section, un bord arrondi sous forme d'un demi cercle. At the level of its proximal part, the section of the rod is very substantially flat, with rounded edges (FIG. 3). This section is gradually connected to a round section at the distal end of the rod (Figure 8). We refer to Figures 4, 5, 6 and 7 which show this gradual change of section. Note that the rod (i) has on the internal side, whatever its cross-sectional shape, a rounded edge in the form of a semicircle.

Ces dispositions permettent d'adapter parfaitement la tige au profil de la cavité médullaire. These provisions make it possible to adapt the rod perfectly to the profile of the medullary cavity.

Les avantages ressortent bien de la description.  The advantages are apparent from the description.

Claims (3)

REVENDICATIONS -1- Implant fémoral pour prothèse de hanche sous forme d'une tige (i) destinée à être introduite dans le canal médullaire, caractérisé en ce que la tige présente, dans sa partie proximale (la) et dans le plan frontal, des nervures (lb) convenablement orientées selon un rayon de courbure (Rl-R2) correspondant au mouvement d'introduction de ladite tige dans le canal médullaire.-1- Femoral implant for hip prosthesis in the form of a rod (i) intended to be introduced into the medullary canal, characterized in that the rod has, in its proximal part (la) and in the frontal plane, ribs (lb) suitably oriented along a radius of curvature (Rl-R2) corresponding to the movement of introduction of said rod into the medullary canal. -2- Implant fémoral selon la revendication 1, caractérisé en ce que les nervures (lb) sont formées en relief de chacune des faces interne et externe de la partie proximale de la tige (1).  -2- Femoral implant according to claim 1, characterized in that the ribs (lb) are formed in relief on each of the internal and external faces of the proximal part of the rod (1). -3- Implant fémoral selon la revendication 1, caractérisé en ce que la tige est de section dégressive dans le plan frontal et sagittal depuis sa partie proximale jusqu'à son extrémité distale, avec une section méplate à bords arrondis au niveau de sa partie proximale, ladite section se raccordant progressivement jusqu'à une section ronde au niveau de son extrémité distale. -3- Femoral implant according to claim 1, characterized in that the rod is of tapering section in the frontal and sagittal plane from its proximal part to its distal end, with a flat section with rounded edges at its proximal part , said section progressively connecting to a round section at its distal end.
FR9013328A 1990-10-22 1990-10-22 FEMORAL IMPLANT. Expired - Lifetime FR2668059B1 (en)

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FR9013328A FR2668059B1 (en) 1990-10-22 1990-10-22 FEMORAL IMPLANT.

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FR9013328A FR2668059B1 (en) 1990-10-22 1990-10-22 FEMORAL IMPLANT.

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FR2668059B1 FR2668059B1 (en) 1998-02-13

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0761183A2 (en) * 1995-08-25 1997-03-12 Bristol-Myers Squibb Company Prosthetic implant with fins
EP1205164A1 (en) * 2000-11-07 2002-05-15 Biomet Merck France Hip prosthesis
EP1438932A1 (en) * 2003-01-17 2004-07-21 WALDEMAR LINK GmbH & Co. KG Hip prosthesis with stem for implantation into the femur
FR2868690A1 (en) * 2004-04-13 2005-10-14 Fedan N B N V Femoral component for hip prosthesis, has rod housed in femoral canal of patient, and having tapers along longitudinal and transversal axes, where rod has set of anti-rotation winglets making certain angle relative to longitudinal axis

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627569A1 (en) * 1976-06-19 1977-12-22 Friedrichsfeld Gmbh Prosthesis for head of femur - has ridge at shoulder and groove reaching to lower end
DE3505997A1 (en) * 1984-05-21 1985-11-21 Gebrüder Sulzer AG, Winterthur Stem for a hip endoprosthesis
FR2573648A1 (en) * 1984-11-28 1986-05-30 Rousseau Philippe Cementless railed smooth prosthesis of the upper extremity of the femur
EP0159462B1 (en) * 1984-03-23 1988-05-04 Orthoplant Endoprothetik GmbH Femoral part of a total endoprosthesis for a hip joint
FR2636837A1 (en) * 1988-09-23 1990-03-30 Cremascoli Spa G Hip prosthesis which can be used without cement
FR2637494A1 (en) * 1988-10-06 1990-04-13 Legre Gerard Femoral element for a hip endoprosthesis

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2627569A1 (en) * 1976-06-19 1977-12-22 Friedrichsfeld Gmbh Prosthesis for head of femur - has ridge at shoulder and groove reaching to lower end
EP0159462B1 (en) * 1984-03-23 1988-05-04 Orthoplant Endoprothetik GmbH Femoral part of a total endoprosthesis for a hip joint
DE3505997A1 (en) * 1984-05-21 1985-11-21 Gebrüder Sulzer AG, Winterthur Stem for a hip endoprosthesis
FR2573648A1 (en) * 1984-11-28 1986-05-30 Rousseau Philippe Cementless railed smooth prosthesis of the upper extremity of the femur
FR2636837A1 (en) * 1988-09-23 1990-03-30 Cremascoli Spa G Hip prosthesis which can be used without cement
FR2637494A1 (en) * 1988-10-06 1990-04-13 Legre Gerard Femoral element for a hip endoprosthesis

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0761183A2 (en) * 1995-08-25 1997-03-12 Bristol-Myers Squibb Company Prosthetic implant with fins
EP0761183A3 (en) * 1995-08-25 1998-01-07 Bristol-Myers Squibb Company Prosthetic implant with fins
EP1205164A1 (en) * 2000-11-07 2002-05-15 Biomet Merck France Hip prosthesis
FR2816827A1 (en) * 2000-11-07 2002-05-24 Biomet Merck France HIP PROSTHESIS
EP1438932A1 (en) * 2003-01-17 2004-07-21 WALDEMAR LINK GmbH & Co. KG Hip prosthesis with stem for implantation into the femur
WO2004064689A1 (en) * 2003-01-17 2004-08-05 Waldemar Link Gmbh & Co. Kg Hip prosthesis comprising a shaft to be inserted into the femur
AU2004206728B2 (en) * 2003-01-17 2009-03-26 Waldemar Link Gmbh & Co. Kg Hip prosthesis comprising a shaft to be inserted into the femur
US7914585B2 (en) 2003-01-17 2011-03-29 Waldemar Link Gmbh & Co. Kg Hip prosthesis including a shaft to be inserted into the femur
FR2868690A1 (en) * 2004-04-13 2005-10-14 Fedan N B N V Femoral component for hip prosthesis, has rod housed in femoral canal of patient, and having tapers along longitudinal and transversal axes, where rod has set of anti-rotation winglets making certain angle relative to longitudinal axis

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