FR2918871A1 - Femoral rod for hip prosthesis, has diaphyseal distal portion to be introduced in medullary cavity of femur, and groove or rib with two parallel sections, which are parallel and adjacent to interface zone - Google Patents

Femoral rod for hip prosthesis, has diaphyseal distal portion to be introduced in medullary cavity of femur, and groove or rib with two parallel sections, which are parallel and adjacent to interface zone Download PDF

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Publication number
FR2918871A1
FR2918871A1 FR0705131A FR0705131A FR2918871A1 FR 2918871 A1 FR2918871 A1 FR 2918871A1 FR 0705131 A FR0705131 A FR 0705131A FR 0705131 A FR0705131 A FR 0705131A FR 2918871 A1 FR2918871 A1 FR 2918871A1
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FR
France
Prior art keywords
diaphyseal
parallel
groove
femur
femoral 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
FR0705131A
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French (fr)
Other versions
FR2918871B1 (en
Inventor
Elisabeth Delanoue
Olivier Bringer
Xavier Courjaud
Philippe Deroche
Louis Etienne Gayet
Franck Thanas
Thierry Verjux
Jean Christophe Durand
Jean Yves Hery
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.)
Societe dEtudes de Recherches et de Fabrication SAS SERF
Original Assignee
Societe dEtudes de Recherches et de Fabrication SAS SERF
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Priority to FR0705131A priority Critical patent/FR2918871B1/en
Publication of FR2918871A1 publication Critical patent/FR2918871A1/en
Application granted granted Critical
Publication of FR2918871B1 publication Critical patent/FR2918871B1/en
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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
    • 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
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • 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
    • A61B17/8805—Equipment for handling bone cement or other fluid fillers for introducing fluid filler into bone or extracting it
    • A61B2017/8813—Discharging means for excessively introduced fluid fillers, e.g. discharging excess cement
    • 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
    • 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
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    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
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    • 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
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    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30159—Concave polygonal shapes
    • A61F2002/30168—L-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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30322—The prosthesis having different structural features at different locations within the same prosthesis differing in surface structures
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—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
    • A61F2002/30606—Sets comprising both cemented and non-cemented 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
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3082—Grooves
    • A61F2002/30827—Plurality of grooves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3082—Grooves
    • A61F2002/30827—Plurality of grooves
    • A61F2002/30828—Plurality of grooves 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
    • A61F2/30767—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
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    • 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
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor 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
    • 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 or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4688—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor having operating or control means
    • A61F2002/4696—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor having operating or control means optical
    • 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
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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
    • A61F2230/0043—L-shaped
    • 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
    • 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

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  • 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 rod (1) has an elongated diaphyseal distal portion (3) to be introduced in a medullary cavity of a femur. A metaphyseal proximal portion (2) and the diaphyseal distal portion are connected by a plane interface zone (4) corresponding to a femur cutting zone. An undulation or zigzag shaped groove (5) or a rib has two parallel sections, which are parallel and adjacent to the interface zone. The groove or the rib forms an undulation perpendicularly oriented to an axis (A) of the diaphyseal distal portion.

Description

L'invention concerne une tige fémorale pour prothèse de hanche. LesThe invention relates to a femoral stem for hip prosthesis. The

prothèses de hanche comportent de manière générale une tige fémorale logée dans le canal médullaire du fémur, à l'extrémité supérieure de celui-ci. La tige fémorale est équipée d'une tête fémorale prothétique coopérant, par l'intermédiaire d'un insert, avec une cupule logée dans la cavité cotyloïdienne de l'os iliaque de manière à former une liaison rotule reproduisant le mouvement naturel de la hanche du patient. Préalablement à la pose de la tige, le fémur est coupé au niveau de sa partie supérieure de manière à définir une face supérieure plane inclinée par rapport à l'axe du fémur. En outre, le canal médullaire est généralement agrandi à l'aide de râpes de manière à permettre l'insertion de la tige. Afin de garantir le bon fonctionnement de la prothèse et d'éviter l'usure prématurée de celle-ci, il est nécessaire que la prothèse soit correctement positionnée et, en particulier, que le positionnement de la tige fémorale dans le canal médullaire puisse être précisément contrôlé par le chirurgien lors de la pose. A cette fin, certaines tiges fémorales sont équipées d'une collerette formant butée de positionnement. Ainsi, lors de la pose, la tige est insérée dans le canal médullaire jusqu'à ce que la collerette vienne s'appuyer sur la face supérieure précitée du fémur. Dans ce cas, la tige fémorale risque de ne pas être fixée de manière satisfaisante si la collerette arrive en butée avant l'insertion complète de la tige dans le canal médullaire. D'autres tiges fémorales sont équipées d'un marquage de positionnement réalisé au laser. Toutefois, il a été démontré qu'un tel marquage endommage fortement la tige fémorale de sorte que celle-ci présente des risques de rupture dans les zones marquées. L'invention vise à remédier à ces inconvénients, en proposant une tige fémorale dont l'insertion et le positionnement par rapport au fémur peut 30 être contrôlée facilement, sans risquer d'endommager la tige. A cet effet, l'invention concerne une tige fémorale pour prothèse de hanche comportant une partie proximale métaphysaire et une partie distale diaphysaire de forme allongée, destinée à être introduite dans la cavité médullaire d'un fémur, les parties métaphysaire et diaphysaire étant reliées par 35 une zone d'interface sensiblement plane correspondant à la zone de coupe du fémur, caractérisé en ce que la tige fémorale comporte, dans sa partie diaphysaire, au moins une rainure ou nervure dont une partie au moins est parallèle à l'interface et adjacente à celle-ci. La rainure ou nervure forme ainsi un repère visuel permettant au chirurgien d'apprécier facilement le positionnement et l'insertion de la tige dans le canal médullaire. En particulier, la partie diaphysaire est insérée dans le canal médullaire jusqu'à ce que la partie de la rainure ou nervure qui est parallèle à l'interface vienne coïncider avec le plan défini par la face de coupe du fémur. La position de la rainure ou nervure est adaptée de manière à garantir un enfoncement suffisant de la tige dans le canal médullaire. En outre, l'espace situé entre les nervures ou les rainures peut servir de volume de drainage ou de stockage pour l'excédent de ciment, dans le cas où la tige est fixée au fémur par l'intermédiaire d'un ciment. On rappellera que la tige fémorale peut être fixée dans le canal 15 médullaire, soit par l'intermédiaire d'un ciment, soit par insertion à force sans l'utilisation de ciment. Avantageusement, le plan de l'interface forme un angle compris entre 40 et 50 , préférentiellement de l'ordre de 45 , avec l'axe de la partie diaphysaire. 20 Préférentiellement, la rainure ou nervure parallèle à l'interface est située à une distance comprise entre 0,5 mm et 3 mm de celle-ci. On garantit ainsi que la rainure ou nervure est entièrement recouverte par le fémur. Selon une première forme de réalisation de l'invention, la rainure 25 ou nervure forme une ondulation orientée perpendiculairement à l'axe de la partie diaphysaire. Une telle ondulation permet de favoriser la fixation de la tige lorsque celle-ci est insérée à force dans le canal médullaire. Selon une possibilité de l'invention, la tige comporte une pluralité 30 de rainures ou nervures s'étendant parallèlement les unes aux autres et décalées suivant l'axe de la partie diaphysaire. La présence de plusieurs rainures ou nervure garantit une fixation accrue de la tige dans le canal médullaire. Avantageusement, la tige comporte au moine une rainure dont le 35 fond est constitué par une succession de plans inclinés alternativement les uns par rapport aux autres.  Hip prostheses generally include a femoral stem lodged in the medullary canal of the femur at the upper end thereof. The femoral stem is equipped with a prosthetic femoral head cooperating, via an insert, with a cup located in the acetabular cavity of the iliac bone so as to form a ball joint reproducing the natural movement of the hip of the hip. patient. Prior to the installation of the stem, the femur is cut at its upper part so as to define a planar upper surface inclined relative to the axis of the femur. In addition, the medullary canal is generally enlarged using rasps so as to allow the insertion of the rod. In order to guarantee the proper functioning of the prosthesis and to prevent premature wear thereof, it is necessary that the prosthesis is correctly positioned and, in particular, that the positioning of the femoral stem in the medullary canal can be precisely controlled by the surgeon during the pose. For this purpose, certain femoral stems are equipped with a flange forming a positioning stop. Thus, during installation, the rod is inserted into the medullary canal until the collar comes to bear on the aforementioned upper face of the femur. In this case, the femoral stem may not be satisfactorily fixed if the collar reaches the stop before complete insertion of the stem into the medullary canal. Other femoral stems are equipped with laser positioning markings. However, it has been shown that such marking strongly damages the femoral stem so that it presents risks of rupture in the marked areas. The invention aims to overcome these disadvantages by providing a femoral stem whose insertion and positioning relative to the femur can be controlled easily, without risking damaging the stem. To this end, the invention relates to a femoral stem for a hip prosthesis comprising a metaphyseal proximal portion and a diaphyseal distal portion of elongate shape, intended to be introduced into the medullary cavity of a femur, the metaphyseal and diaphyseal parts being connected by A substantially flat interface area corresponding to the femur section, characterized in that the femoral stem has, in its diaphyseal portion, at least one groove or rib at least a portion of which is parallel to the interface and adjacent to this one. The groove or rib thus forms a visual cue allowing the surgeon to easily assess the positioning and insertion of the rod in the medullary canal. In particular, the diaphyseal portion is inserted into the medullary canal until the portion of the groove or rib that is parallel to the interface coincides with the plane defined by the cutting face of the femur. The position of the groove or rib is adapted to ensure sufficient depression of the rod in the medullary canal. In addition, the space between the ribs or grooves can serve as drainage or storage volume for the excess cement, in the case where the rod is attached to the femur by means of cement. It will be recalled that the femoral stem can be fixed in the medullary canal, either by means of cement or by forced insertion without the use of cement. Advantageously, the plane of the interface forms an angle of between 40 and 50, preferably of the order of 45, with the axis of the diaphyseal part. Preferably, the groove or rib parallel to the interface is located at a distance of between 0.5 mm and 3 mm from the latter. This ensures that the groove or rib is completely covered by the femur. According to a first embodiment of the invention, the groove 25 or rib forms a corrugation oriented perpendicularly to the axis of the diaphyseal portion. Such waving makes it possible to favor fixation of the rod when it is forcibly inserted into the medullary canal. According to a possibility of the invention, the rod comprises a plurality of grooves or ribs extending parallel to each other and offset along the axis of the diaphyseal portion. The presence of several grooves or rib ensures increased fixation of the stem in the medullary canal. Advantageously, the rod comprises at least one groove, the bottom of which consists of a succession of alternately inclined planes relative to each other.

Selon une seconde forme de réalisation de l'invention, la tige comporte plusieurs rainures ou nervures dont chacune comporte deux branches réunies par une partie en forme de boucle présentant un tronçon parallèle à l'interface.  According to a second embodiment of the invention, the rod comprises a plurality of grooves or ribs each having two branches joined by a loop-shaped portion having a section parallel to the interface.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemples non limitatifs, plusieurs formes d'exécution de cette tige fémorale. Figure 1 est une vue de face d'une tige selon une première forme 10 de réalisation de l'invention; Figure 2 est une vue correspondant à la figure 1, d'une seconde forme de réalisation de l'invention. La figure 1 représente une tige fémorale 1 pour prothèse de hanche comportant une partie proximale métaphysaire 2 et une partie distale 15 diaphysaire 3 de forme allongée et définissant un axe A. La partie diaphysaire 3 est destinée à être introduite dans la cavité médullaire d'un fémur (non représenté), comme cela est connu en soi. Les parties métaphysaire 2 et diaphysaire 3 sont reliées par une zone d'interface sensiblement plane 4 correspondant à la zone de coupe du 20 fémur une fois la tige 1 en position, comme cela est décrit ci-après. Le plan de l'interface 4 forme un angle a compris entre 40 et 50 , préférentiellement de l'ordre de 45 , avec l'axe A de la partie diaphysaire 3. La tige fémorale 1 comporte, dans sa partie diaphysaire 3, une pluralité de rainures 5 en forme d'ondulation ou de zig-zag, s'étendant suivant 25 un axe perpendiculaire à l'axe A de la partie diaphysaire 3. Les rainures 5 s'étendent parallèlement les unes aux autres et sont décalées suivant l'axe A de la partie diaphysaire 3. Les rainures 5 sont ainsi constituées d'une succession de tronçons 6', 6", inclinés de manière alternative les uns par rapport aux autres, un 30 tronçon 6' sur deux étant parallèle au plan de l'interface 4. Comme visible plus particulièrement en figure 2, les tronçons 6' parallèles et adjacents à l'interface 4 sont disposés à une distance d comprise entre 0,5 mm et 3 mm de celle-ci, préférentiellement de l'ordre de 1 mm. La position des tronçons 6' est adaptée de manière à garantir une insertion 35 suffisante de la tige 1 dans le canal médullaire du fémur.  In any case, the invention will be better understood with the aid of the description which follows, with reference to the appended schematic drawing showing, by way of nonlimiting examples, several embodiments of this femoral stem. Figure 1 is a front view of a rod according to a first embodiment of the invention; Figure 2 is a view corresponding to Figure 1, a second embodiment of the invention. FIG. 1 represents a femoral stem 1 for a hip prosthesis comprising a metaphyseal proximal portion 2 and a diaphyseal distal portion 3 of elongate shape and defining an axis A. The diaphyseal portion 3 is intended to be introduced into the medullary cavity of an femur (not shown), as is known per se. The metaphyseal 2 and diaphyseal portions 3 are connected by a substantially planar interface area 4 corresponding to the cutting zone of the femur once the stem 1 is in position, as described hereinafter. The plane of the interface 4 forms an angle α of between 40 and 50, preferably of the order of 45, with the axis A of the diaphyseal portion 3. The femoral stem 1 comprises, in its diaphyseal portion 3, a plurality grooves 5 in the form of waves or zig-zag, extending along an axis perpendicular to the axis A of the diaphyseal portion 3. The grooves 5 extend parallel to each other and are offset according to the Axis A of the diaphyseal portion 3. The grooves 5 thus consist of a succession of sections 6 ', 6 ", inclined alternately with respect to each other, a section 6' out of two being parallel to the plane of the As can be seen more particularly in FIG. 2, the sections 6 'parallel to and adjacent to the interface 4 are arranged at a distance d of between 0.5 mm and 3 mm from the latter, preferably of the order of 1 mm The position of the sections 6 'is adapted so as to guarantee insertion 35 sufficient rod 1 in the medullary canal of the femur.

Les rainures 5 ménagées dans la tige 1 comportent un fond constitué par une succession de plans inclinés alternativement les uns par rapport aux autres. Lors de l'insertion de la tige 1 dans le canal médullaire, le chirurgien peut facilement apprécier la distance d'insertion de la tige puisque, lorsque les tronçons 6' disposés à proximité de l'interface sont situés dans le plan de coupe du fémur, la tige 1 est suffisamment enfoncée dans le canal médullaire pour offrir une fixation satisfaisante. Une fois atteint ce point d'insertion suffisante, le chirurgien peut 10 continuer l'insertion de la tige sur une faible distance, par exemple 1 mm, de manière à s'assurer qu'aucune zone rainurée ne dépasse de l'os. Après insertion complète de la tige dans le canal médullaire, le plan de coupe du fémur correspond sensiblement au plan de l'interface 4 de la tige 1.  The grooves 5 in the rod 1 comprise a bottom consisting of a succession of alternately inclined planes relative to each other. During the insertion of the rod 1 into the medullary canal, the surgeon can easily appreciate the insertion distance of the rod since, when the sections 6 'disposed near the interface are located in the cutting plane of the femur , the stem 1 is sufficiently pushed into the medullary canal to provide a satisfactory fixation. Once reached this sufficient insertion point, the surgeon can continue inserting the rod a short distance, for example 1 mm, so as to ensure that no grooved area protrudes from the bone. After complete insertion of the rod into the medullary canal, the cutting plane of the femur corresponds substantially to the plane of the interface 4 of the rod 1.

15 Cette première variante de réalisation est particulièrement adaptée à la pose sans ciment dans le fémur, la fixation étant réalisé par insertion à force de la tige 1 par l'intermédiaire des rainures 5 qui, ménagées sur la tige 1, favorisent la fixation. Une autre variante de réalisation de l'invention est représentée à la 20 figure 3. Dans cette variante de réalisation, la tige diffère en ce que qu'elle comporte plusieurs rainures 5 comprenant chacune deux branches 7 réunies par une partie en forme de boucle présentant un tronçon parallèle 9 à l'interface 4.This first embodiment is particularly suitable for laying without cement in the femur, the fixing being carried out by insertion of the rod 1 through the grooves 5, formed on the rod 1, promote fixation. Another embodiment of the invention is shown in FIG. 3. In this variant embodiment, the rod differs in that it comprises a plurality of grooves 5 each comprising two branches 7 joined by a loop-shaped part having a parallel section 9 at the interface 4.

25 Comme visible plus particulièrement en figure 4, les tronçons parallèles 9 sont adjacents à l'interface 4 et disposés à une distance d de l'ordre de 2,5 mm par rapport à celle-ci. Chaque rainure comporte une section arrondie dont le rayon de courbure r est de l'ordre de 1 mm. De même que précédemment, les tronçons 9 parallèles à l'interface 30 4 forment des éléments de visualisation de la position de la tige 1 dans le canal médullaire. Cette seconde variante de réalisation est particulièrement adaptée à la pose avec utilisation de ciment. Dans ce cas, la forme spécifique des rainures 5 favorise le drainage de l'excédent de ciment.As can be seen more particularly in FIG. 4, the parallel sections 9 are adjacent to the interface 4 and arranged at a distance d of the order of 2.5 mm with respect thereto. Each groove has a rounded section whose radius of curvature r is of the order of 1 mm. As before, the sections 9 parallel to the interface 4 form elements for visualizing the position of the rod 1 in the medullary canal. This second embodiment is particularly suitable for laying with use of cement. In this case, the specific shape of the grooves 5 promotes drainage of the excess cement.

35 Comme il va de soi, l'invention ne se limite pas aux seules formes d'exécution de ce système, décrites ci-dessus à titre d'exemple, mais elle embrasse au contraire toutes les variantes. C'est ainsi notamment que la tige pourrait être équipée de nervures, ou que la forme des nervures ou rainures pourrait être adaptée en fonction de l'utilisation.As is obvious, the invention is not limited to the embodiments of this system, described above by way of example, but embraces all variants. It is thus particularly that the rod could be equipped with ribs, or that the shape of the ribs or grooves could be adapted according to the use.

Claims (7)

REVENDICATIONS 1. Tige fémorale (1) pour prothèse de hanche comportant une partie proximale métaphysaire (2) et une partie distale diaphysaire (3) de forme allongée, destinée à être introduite dans la cavité médullaire d'un fémur, les parties métaphysaire (2) et diaphysaire (3) étant reliées par une zone d'interface (4) sensiblement plane correspondant à la zone de coupe du fémur, caractérisé en ce que la tige fémorale (1) comporte, dans sa partie diaphysaire (3), au moins une rainure (5) ou nervure dont une partie au moins (6', 9) est parallèle à l'interface (4) et adjacente à celle-ci.  A femoral stem (1) for a hip prosthesis having a metaphyseal proximal portion (2) and an elongated diaphyseal distal portion (3) for insertion into the medullary cavity of a femur, the metaphyseal portions (2) and diaphyseal (3) being connected by a substantially planar interface zone (4) corresponding to the femur cutting zone, characterized in that the femoral stem (1) comprises, in its diaphyseal portion (3), at least one groove (5) or rib of which at least a portion (6 ', 9) is parallel to and adjacent the interface (4). 2. Tige fémorale (1) selon la revendication 1, caractérisée en ce que le plan de l'interface (4) forme un angle (a) compris entre 40 et 50 , préférentiellement de l'ordre de 45 , avec l'axe (A) de la partie diaphysaire (3).  2. femoral stem (1) according to claim 1, characterized in that the plane of the interface (4) forms an angle (a) between 40 and 50, preferably of the order of 45, with the axis ( A) of the diaphyseal part (3). 3. Tige fémorale (1) selon la revendication 3, caractérisée en ce que chaque partie de la rainure (5) ou nervure parallèle à l'interface (4) est située à une distance (d) comprise entre 0,5 mm et 3 mm de celle-ci.  3. femoral stem (1) according to claim 3, characterized in that each portion of the groove (5) or rib parallel to the interface (4) is located at a distance (d) between 0.5 mm and 3 mm of it. 4. Tige fémorale (1) selon l'une des revendications 1 à 3, 20 caractérisée en ce la rainure (5) ou nervure forme une ondulation orientée perpendiculairement à l'axe (A) de la partie diaphysaire (3).  4. femoral stem (1) according to one of claims 1 to 3, characterized in that the groove (5) or rib forms a corrugation oriented perpendicular to the axis (A) of the diaphyseal portion (3). 5. Tige fémorale (1) selon l'une des revendications 1 à 4, caractérisé en ce qu'elle comporte une pluralité de rainures (5) ou nervures 25 s'étendant parallèlement les unes aux autres et décalées suivant l'axe (A) de la partie diaphysaire (3).  5. Femoral stem (1) according to one of claims 1 to 4, characterized in that it comprises a plurality of grooves (5) or ribs 25 extending parallel to each other and offset along the axis (A ) of the diaphyseal part (3). 6. Tige fémorale (1) selon l'une des revendications 1 à 5, caractérisée en ce qu'elle comporte au moins une rainure (5) dont le fond est 30 constitué par une succession de plans inclinés alternativement les uns par rapport aux autres.  6. femoral stem (1) according to one of claims 1 to 5, characterized in that it comprises at least one groove (5) whose bottom is constituted by a succession of inclined planes alternately with respect to each other . 7. Tige fémorale (1) selon l'une des revendications 1 à 3, caractérisée en ce qu'elle comporte plusieurs rainures (5) ou nervures dont 35 chacune comporte deux branches (7) réunies par une partie en forme de boucle (8) présentant un tronçon (9) parallèle à l'interface (4).  7. Femoral stem (1) according to one of claims 1 to 3, characterized in that it comprises a plurality of grooves (5) or ribs each of which comprises two branches (7) joined by a loop-shaped portion (8). ) having a section (9) parallel to the interface (4).
FR0705131A 2007-07-16 2007-07-16 FEMALE ROD FOR HIP PROSTHESIS Active FR2918871B1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989008436A1 (en) * 1988-03-15 1989-09-21 Dirk Victor Vermeire Hip prosthesis
FR2676914A1 (en) * 1991-05-28 1992-12-04 Tec Implant Sarl Anatomical femoral prosthesis
FR2683717A1 (en) * 1991-11-20 1993-05-21 Impact Est Femoral stem for total hip prosthesis
FR2793675A1 (en) * 1999-05-19 2000-11-24 Ile Octophoron Soc Civ Set of femoral rods used during orthopedic implants, such as for hip prosthesis, comprises cemented rod and non-cemented, with cemented rod having lateral hollowing-outs in its upper section
FR2794639A1 (en) * 1999-06-08 2000-12-15 I S C Hip prosthesis femoral implant shank has at least one proximal section groove with discontinuous lengthwise surface

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989008436A1 (en) * 1988-03-15 1989-09-21 Dirk Victor Vermeire Hip prosthesis
FR2676914A1 (en) * 1991-05-28 1992-12-04 Tec Implant Sarl Anatomical femoral prosthesis
FR2683717A1 (en) * 1991-11-20 1993-05-21 Impact Est Femoral stem for total hip prosthesis
FR2793675A1 (en) * 1999-05-19 2000-11-24 Ile Octophoron Soc Civ Set of femoral rods used during orthopedic implants, such as for hip prosthesis, comprises cemented rod and non-cemented, with cemented rod having lateral hollowing-outs in its upper section
FR2794639A1 (en) * 1999-06-08 2000-12-15 I S C Hip prosthesis femoral implant shank has at least one proximal section groove with discontinuous lengthwise surface

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