FR2641462A1 - Hip prosthesis with a variable cross-section comprising a constant profile - Google Patents

Hip prosthesis with a variable cross-section comprising a constant profile Download PDF

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Publication number
FR2641462A1
FR2641462A1 FR9000372A FR9000372A FR2641462A1 FR 2641462 A1 FR2641462 A1 FR 2641462A1 FR 9000372 A FR9000372 A FR 9000372A FR 9000372 A FR9000372 A FR 9000372A FR 2641462 A1 FR2641462 A1 FR 2641462A1
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FR
France
Prior art keywords
prosthesis
section
hip prosthesis
elongated body
hip
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.)
Withdrawn
Application number
FR9000372A
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French (fr)
Inventor
Francoise Roux
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CREMASCOLI SpA G
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CREMASCOLI SpA G
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Filing date
Publication date
Application filed by CREMASCOLI SpA G filed Critical CREMASCOLI SpA G
Publication of FR2641462A1 publication Critical patent/FR2641462A1/en
Withdrawn legal-status Critical Current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
    • A61F2/30767—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
    • A61F2/367—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
    • A61F2/32—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
    • A61F2002/30138—Convex polygonal shapes
    • 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
    • A61F2002/30154—Convex polygonal shapes square
    • 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
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A61F2002/30616—Sets comprising a plurality of prosthetic parts of different sizes or orientations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/365—Connections of heads to necks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • 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
    • A61F2230/0004—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
    • 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
    • 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
    • A61F2230/0017—Angular shapes
    • A61F2230/0019—Angular 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
    • 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
    • A61F2230/0021—Angular shapes square
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni 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)
  • 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 present invention concerns a hip prosthesis of variable cross-section having a constant profile. The prosthesis according to the invention comprises an elongate body 2 whose end is provided with a connection element comprising a small head. The elongate body 2 has a constant median curvature, even when the dimensions of the prosthesis change, and a cross-section narrowing from the upper end of the said body towards its lower end.

Description

PROTHESE DE HANCHE A SECTION VARIABLE COMPORTANT UN
PROFIL CONSTANT.HIP PROSTHESIS WITH VARIABLE SECTION INCLUDING A
CONSTANT PROFILE.

La présente invention concerne une prothèse de hanche de section variable, présentant un profil constant.The present invention relates to a hip prosthesis of variable section, having a constant profile.

On utilise à ltheure actuelle de nombreuses sortes de prothèses de hanche, conçues pour être insérées dans l'os fémoral pour reconstituer une articulation avec le bassin.Numerous kinds of hip prostheses are currently used, designed to be inserted into the femoral bone to reconstruct a joint with the pelvis.

Les prothèses connues doivent avoir des formes et des dimensions différentes en fonction de la morphologie des os dans lesquels elles doivent être insérées.Known prostheses must have different shapes and dimensions depending on the morphology of the bones in which they are to be inserted.

Cette diversité des caractéristiques des prothèses utilisées comporte de nombreux inconvénients, car il est nécessaire de réaliser les prothèses de hanche de dimension variable, sous des formes différentes, et pouvant résister sans problème à toutes sortes d'efforts mécaniques.This diversity of the characteristics of the prostheses used has many drawbacks, because it is necessary to produce hip prostheses of variable size, in different forms, and which can withstand all kinds of mechanical forces without problem.

La présente invention a pour but d'éliminer les inconvénients mentionnés ci-dessus en réalisant une prothèse de hanche de section variable, présentant un profil constant et permettant de conserver la même courbure médiane, ceci même si les dimensions sont différentes afin de simplifier la réalisation de la prothèse tout en garantissant une résistance mécanique très élevée.The aim of the present invention is to eliminate the drawbacks mentioned above by producing a hip prosthesis of variable section, having a constant profile and making it possible to maintain the same median curvature, even if the dimensions are different in order to simplify the production. of the prosthesis while guaranteeing a very high mechanical resistance.

Dans ce but, la présente invention se propose de réaliser une prothèse de hanche pouvant être appliquée avec ou sans ciment, par simple changement des éléments de surface de la prothèse, avec des garanties de fiabilité optimale.To this end, the present invention proposes to produce a hip prosthesis which can be applied with or without cement, by simple change of the surface elements of the prosthesis, with guarantees of optimal reliability.

Un autre but de la présente invention est de réaliser une prothèse de hanche facile à fabriquer, au moyen de matériaux couramment disponibles sur le marché, ladite prothèse pouvant être facilement adaptée à des configurations osseuses très différentes. Another object of the present invention is to produce a hip prosthesis that is easy to manufacture, using materials commonly available on the market, said prosthesis being able to be easily adapted to very different bone configurations.

Les buts mentionnés ci-dessus sont atteints par une prothèse de hanche de section variable présentant un profil constant caractérisée en ce qu'elle comporte un corps allongé dont le sommet est muni d'un élément de connexion avec une petite tête, ledit corps allongé présentant une courbure médiane uniforme et les dimensions de la prothèse étant variable, la section transversale dudit corps allant en se rétrécissant à partir de l'extrémité supérieure vers l'extrémité inférieure.The above-mentioned aims are achieved by a hip prosthesis of variable section having a constant profile, characterized in that it comprises an elongated body, the top of which is provided with a connection element with a small head, said elongated body having a uniform median curvature and the dimensions of the prosthesis being variable, the cross section of said body narrowing from the upper end to the lower end.

D'autres caractéristiques et avantages de la prothèse de hanche selon la présente invention vont à présent être décrits en référence à un mode de réalisation préféré mais non limitatif, et en référence au dessin annexé, dans lequel - la figure I est une vue latérale schématique en élévation représen
tant la prothèse de hanche selon la présente invention, - la figure 2 est une vue du devant de la prothèse représentée à la
figure 1.Other characteristics and advantages of the hip prosthesis according to the present invention will now be described with reference to a preferred but nonlimiting embodiment, and with reference to the attached drawing, in which - Figure I is a schematic side view in elevation shown
both the hip prosthesis according to the present invention, - Figure 2 is a front view of the prosthesis shown in the
figure 1.

- la figure 3 est une vue en coupe selon la ligne 111-111 de la figure 1, - la figure 4 est une vue en coupe selon la ligne IV-IV de la figure 2, - la figure 5 est une vue en coupe selon la ligne V-V de la figure 1, - la figure 6 est une vue en coupe selon la ligne VI-VI de la figure 1 - la figure 7 est une vue en coupe selon la ligne VII-VII de la figure 1 - la figure 8 est une vue latérale en élévation représentant une
prothèse de hanche, dans laquelle les lignes brisées représentent des
variations de formes de la prothèse, dont la courbure médiane est
constante et, - la figure 9 est une représentation schématique, illustrant par des
lignes brisées des variations d'épaisseur en fonction des variations de
dimensions de la prothèse.- Figure 3 is a sectional view along line 111-111 of Figure 1, - Figure 4 is a sectional view along line IV-IV of Figure 2, - Figure 5 is a sectional view along line VV of figure 1, - figure 6 is a sectional view along line VI-VI of figure 1 - figure 7 is a sectional view along line VII-VII of figure 1 - figure 8 is a side elevation view showing a
hip prosthesis, in which the broken lines represent
variations in the shape of the prosthesis, the median curvature of which is
constant and, - Figure 9 is a schematic representation, illustrating by
broken lines variations in thickness as a function of variations in
dimensions of the prosthesis.

En se référant aux différentes figures annexées, la prothèse de hanche selon la présente invention, désignée sous le chiffre de référence l, comporte un corps allongé, réalisée de manière avantageuse en titane, dont le sommet est muni d'un élément de connexion 3 formé d'un cône auquel on peut associer des petites têtes de longueur variable en fonction des articulations à réaliser.Referring to the various appended figures, the hip prosthesis according to the present invention, designated by the reference numeral l, comprises an elongated body, advantageously made of titanium, the top of which is provided with a connection element 3 formed a cone to which small heads of variable length can be associated depending on the joints to be produced.

Le corps allongé peut être utilisé sans ciment. En ce cas, on appliquera un revêtement en hydroxyapatite sur sa partie supérieure. Par contre, lorsque la prothèse est insérée au moyen de ciment, il ne sera pas nécessaire d'appliquer ce type de revêtement.The elongated body can be used without cement. In this case, a hydroxyapatite coating will be applied to its upper part. On the other hand, when the prosthesis is inserted by means of cement, it will not be necessary to apply this type of coating.

La prothèse utilisée présente une forme élargie dans sa partie supérieure et va en se rétrécissant vers sa partie inférieure.The prosthesis used has an enlarged shape in its upper part and tapers towards its lower part.

Il est important de remarquer que le corps allongé 2 présente une courbure médiane 4 qui est constante, ceci même si les dimensions de la prothèse changent.It is important to note that the elongated body 2 has a median curvature 4 which is constant, even if the dimensions of the prosthesis change.

Ainsi que cela apparaît sur les figures 3 à 7, la prothèse présente dans sa partie supérieure une section transversale, définissant une zone carrée 10 à laquelle est associé un coin 11, cette configuration se modifiant au niveau de la tige de la prothèse où est prévue une section rectangulaire 12 avec laquelle coopère un coin 13 de longueur réduite.As shown in Figures 3 to 7, the prosthesis has in its upper part a cross section, defining a square area 10 with which is associated a wedge 11, this configuration being modified at the level of the stem of the prosthesis where is provided a rectangular section 12 with which a wedge 13 of reduced length cooperates.

L'extrémité inférieure de la prothèse présente une épaisseur décroissante ainsi que cela est représenté sur la figure 5 à 7. Elle présente en section deux flancs parallèles 14 reliés par des parties recourbées 15.The lower end of the prosthesis has a decreasing thickness as shown in FIG. 5 to 7. It has in section two parallel flanks 14 connected by curved parts 15.

Cette configuration permet d'obtenir de bonnes caractéristiques de résistance mécanique en fonction des matériaux utilisés et des opérations d'usinage nécessaires, puisque la surface du corps allongé comporte dans sa partie supérieure une surface de forte rugosité, qui se réduit petit à petit jusqu'à devenir lisse au niveau de l'extrémité inférieure.This configuration makes it possible to obtain good mechanical strength characteristics depending on the materials used and the machining operations required, since the surface of the elongated body has in its upper part a surface of high roughness, which gradually reduces until to become smooth at the lower end.

I1 apparaît clairement des figures 8 et 9 que lorsque les dimensions de la prothèse changent on a recours à un élargissement correspondant de la partie du corps opposé à la partie recourbée médiane, l'extrémité inférieure étant allongée en conséquence, et la géométrie d'ensemble de la prothèse étant inchangée. It appears clearly from FIGS. 8 and 9 that when the dimensions of the prosthesis change, recourse is had to a corresponding enlargement of the part of the body opposite the median curved part, the lower end being elongated accordingly, and the overall geometry of the prosthesis being unchanged.

La description qui précède permet de constater que l'on réalise bien une prothèse de profil constant dans la partie recourbée médiane présentant une section variable allant en se rétrécissant vers l'extrémité inférieure du corps allongé, ce qui permet son application sur le fémur dans les meilleures conditions possibles. The foregoing description shows that a prosthesis of constant profile is well produced in the middle curved part having a variable section which tapers towards the lower end of the elongated body, which allows its application on the femur in the best possible conditions.

L'invention telle que décrite ci-dessus peut subir de nombreuses modifications et variantes évidentes pour l'homme de l'art sans que l'on sorte du cadre de l'invention.The invention as described above can undergo many modifications and variants obvious to those skilled in the art without departing from the scope of the invention.

En particulier, les détails constructifs décrits peuvent être remplacés par d'autres éléments techniquement équivalents.In particular, the construction details described can be replaced by other technically equivalent elements.

Enfin, les matériaux utilisés, dès lors qu'ils sont compatibles avec l'usage envisagé, de même que les formes et dimensions spécifiques peuvent être quelconques en fonction des exigences. Finally, the materials used, as soon as they are compatible with the intended use, as well as the specific shapes and dimensions can be any according to the requirements.

Claims (5)

RevendicationsClaims 1. Prothèse de hanche de section variable présentant un profil constant, caractérisée en ce qu'elle comprend un corps allongé (2) dont l'extrémité est munie d'un élément de connexion (3) associé à une petite tête, ledit corps présentant une courbure médiane constante lorsque les dimensions de la prothèse changent et une section transversale se rétrécissant à partir de l'extrémité supérieure dudit corps vers l'extrémité inférieure.1. hip prosthesis of variable section having a constant profile, characterized in that it comprises an elongated body (2) the end of which is provided with a connection element (3) associated with a small head, said body having a constant median curvature when the dimensions of the prosthesis change and a cross-section narrowing from the upper end of said body towards the lower end. 2. Prothèse de hanche selon la revendication l, caractérisée en ce que l'élément de connexion comporte une partie conique qui peut être associée avec une petite tête de longueur variable.2. hip prosthesis according to claim l, characterized in that the connection element comprises a conical part which can be associated with a small head of variable length. 3. Prothèse selon l'une quelconque des revendications précédentes, caractérisée en ce que le corps allongé (2) présente, dans son extrémité supérieure, une section transversale de forme carrée, associée à un coin. 3. Prosthesis according to any one of the preceding claims, characterized in that the elongated body (2) has, in its upper end, a cross section of square shape, associated with a corner. 4. Prothèse selon l'une quelconque des revendications précédentes, caractérisée en ce que le corps allongé (2) comporte en sa partie inférieure des flancs parallèles (14) reliés par des parties recourbées (15) opposées.4. Prosthesis according to any one of the preceding claims, characterized in that the elongated body (2) comprises in its lower part parallel flanks (14) connected by curved parts (15) opposite. 5. Prothèse de hanche selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle est réalisée en alliage de titane, et comporte, lorsqu'elle est appliquée sans ciment un revêtement en hydroxyapatite disposé sur la partie supérieure de l'extension longitudinale du corps allongé. 5. Hip prosthesis according to any one of the preceding claims, characterized in that it is made of titanium alloy, and comprises, when applied without cement, a hydroxyapatite coating disposed on the upper part of the extension longitudinal of the elongated body.
FR9000372A 1989-01-11 1990-01-10 Hip prosthesis with a variable cross-section comprising a constant profile Withdrawn FR2641462A1 (en)

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IT8919062A IT1228220B (en) 1989-01-11 1989-01-11 VARIABLE SECTION HIP PROSTHESIS AND CONSTANT PERFORMANCE PROFILE.

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5456717A (en) * 1992-12-07 1995-10-10 Plus Endoprothtik Ag Stem for a femoral hip-joint endoprosthesis
FR2744628A1 (en) * 1996-02-08 1997-08-14 Deckner Andre Georges PROSTHESIS ANCHOR ROD
EP0908158A2 (en) * 1997-09-16 1999-04-14 Franz Copf Set of prostheses of different sizes
EP0962199A1 (en) * 1998-06-04 1999-12-08 Sulzer Orthopädie AG Shaft prosthesis
FR2781365A1 (en) * 1998-07-24 2000-01-28 Jacques Bejui ANCHORING ROD FOR HIP JOINT PROSTHESIS AND SET OF SUCH RODS
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
FR2797762A1 (en) * 1999-08-27 2001-03-02 Cottin Philippe Femoral implant for artificial hip joint has frustoconical projection which accommodates ball, standing on conical base and has curved tapered projection extending from shoulder
ES2164542A1 (en) * 1999-07-19 2002-02-16 Sursival Co S A Endofemoral rod for hip prosthesis
FR2815536A1 (en) * 2000-10-25 2002-04-26 Marc Anzalone Cemented femoral implant shank has upper end shaped to form centering plug to prevent any escape of cement
EP1013243A3 (en) * 1998-12-21 2002-10-16 Benoist Girard Sas Femoral component for use in replacement hip joint
EP1260199A2 (en) * 2001-05-25 2002-11-27 Donald W. Howie Prosthetic implant
FR2901468A1 (en) * 2006-05-23 2007-11-30 Fournitures Hospitalieres Ind Prosthetic femoral rod set for bone cavity, has two femoral rods assemblies, where length and overall profile of medullar part of one rod with specific size are identical to that of medullar part of another rod with another specific size
FR2935892A1 (en) * 2008-09-17 2010-03-19 T O FEMALE HIP PROSTHESIS ROD
FR2959659A1 (en) * 2010-05-07 2011-11-11 Thierry Chatenet Prosthetic femoral rod assembly for use during surgery of e.g. hip, has proximal part comprises elongated shape transversal sections with greater dimension extending along plane, where two planes are inclined with respect to each other

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EP0112423A1 (en) * 1982-12-17 1984-07-04 Francis Henri Bréard Joint prosthesis, especially femoral prosthesis with self-blocking, wedge-shaped intramedullary stem
EP0201442A2 (en) * 1985-04-05 1986-12-17 France Implant Modular prosthetic device
FR2592786A1 (en) * 1986-01-10 1987-07-17 Legrange Jean Hip prosthesis rod
FR2599245A1 (en) * 1986-05-28 1987-12-04 Dambreville Alain Prosthesis for the upper end of the femur with metaphyseal support
FR2629707A1 (en) * 1988-04-07 1989-10-13 Roux Jean Pierre Femoral piece and equipment for making a hip prosthesis
FR2636837A1 (en) * 1988-09-23 1990-03-30 Cremascoli Spa G Hip prosthesis which can be used without cement

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Publication number Priority date Publication date Assignee Title
EP0112423A1 (en) * 1982-12-17 1984-07-04 Francis Henri Bréard Joint prosthesis, especially femoral prosthesis with self-blocking, wedge-shaped intramedullary stem
EP0201442A2 (en) * 1985-04-05 1986-12-17 France Implant Modular prosthetic device
FR2592786A1 (en) * 1986-01-10 1987-07-17 Legrange Jean Hip prosthesis rod
FR2599245A1 (en) * 1986-05-28 1987-12-04 Dambreville Alain Prosthesis for the upper end of the femur with metaphyseal support
FR2629707A1 (en) * 1988-04-07 1989-10-13 Roux Jean Pierre Femoral piece and equipment for making a hip prosthesis
FR2636837A1 (en) * 1988-09-23 1990-03-30 Cremascoli Spa G Hip prosthesis which can be used without cement

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5456717A (en) * 1992-12-07 1995-10-10 Plus Endoprothtik Ag Stem for a femoral hip-joint endoprosthesis
FR2744628A1 (en) * 1996-02-08 1997-08-14 Deckner Andre Georges PROSTHESIS ANCHOR ROD
EP0790045A1 (en) * 1996-02-08 1997-08-20 André Georges Deckner Anchoring shaft, especially for use in prostheses
US5928289A (en) * 1996-02-08 1999-07-27 Deckner; Andregeorges Anchoring rod used particularly in prostheses
EP0908158A2 (en) * 1997-09-16 1999-04-14 Franz Copf Set of prostheses of different sizes
EP0908158A3 (en) * 1997-09-16 1999-12-08 Franz Copf Set of prostheses of different sizes
US6254640B1 (en) 1998-06-04 2001-07-03 Sulzer Orthopaedie Ag Shaft prosthesis and set
EP0962199A1 (en) * 1998-06-04 1999-12-08 Sulzer Orthopädie AG Shaft prosthesis
FR2781365A1 (en) * 1998-07-24 2000-01-28 Jacques Bejui ANCHORING ROD FOR HIP JOINT PROSTHESIS AND SET OF SUCH RODS
EP1013243A3 (en) * 1998-12-21 2002-10-16 Benoist Girard Sas Femoral component for use in replacement hip joint
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
ES2164542A1 (en) * 1999-07-19 2002-02-16 Sursival Co S A Endofemoral rod for hip prosthesis
FR2797762A1 (en) * 1999-08-27 2001-03-02 Cottin Philippe Femoral implant for artificial hip joint has frustoconical projection which accommodates ball, standing on conical base and has curved tapered projection extending from shoulder
FR2815536A1 (en) * 2000-10-25 2002-04-26 Marc Anzalone Cemented femoral implant shank has upper end shaped to form centering plug to prevent any escape of cement
EP1260199A2 (en) * 2001-05-25 2002-11-27 Donald W. Howie Prosthetic implant
EP1260199A3 (en) * 2001-05-25 2004-06-16 Donald W. Howie Prosthetic implant
FR2901468A1 (en) * 2006-05-23 2007-11-30 Fournitures Hospitalieres Ind Prosthetic femoral rod set for bone cavity, has two femoral rods assemblies, where length and overall profile of medullar part of one rod with specific size are identical to that of medullar part of another rod with another specific size
FR2935892A1 (en) * 2008-09-17 2010-03-19 T O FEMALE HIP PROSTHESIS ROD
FR2935893A1 (en) * 2008-09-17 2010-03-19 T O FEMALE HIP PROSTHESIS ROD
WO2010031922A1 (en) * 2008-09-17 2010-03-25 T.O. Femoral rod for a hip prosthesis
FR2959659A1 (en) * 2010-05-07 2011-11-11 Thierry Chatenet Prosthetic femoral rod assembly for use during surgery of e.g. hip, has proximal part comprises elongated shape transversal sections with greater dimension extending along plane, where two planes are inclined with respect to each other

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Publication number Publication date
IT1228220B (en) 1991-06-05
IT8919062A0 (en) 1989-01-11

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