FR2678161A1 - Fixation bracket to be cemented, for the male part of a hip prosthesis ball-joint - Google Patents

Fixation bracket to be cemented, for the male part of a hip prosthesis ball-joint Download PDF

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Publication number
FR2678161A1
FR2678161A1 FR9107767A FR9107767A FR2678161A1 FR 2678161 A1 FR2678161 A1 FR 2678161A1 FR 9107767 A FR9107767 A FR 9107767A FR 9107767 A FR9107767 A FR 9107767A FR 2678161 A1 FR2678161 A1 FR 2678161A1
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France
Prior art keywords
head
axis
fixing
concave
tail
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Granted
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FR9107767A
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French (fr)
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FR2678161B3 (en
Inventor
Perol Henri
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BIOMECANIQUE INTEGREE
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BIOMECANIQUE INTEGREE
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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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—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
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A61F2002/30332—Conically- or frustoconically-shaped protrusion and recess
    • 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
    • A61F2/3094—Designing or manufacturing processes
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • A61F2002/30952—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using CAD-CAM techniques or NC-techniques
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3611—Heads or epiphyseal parts of femur
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/365—Connections of heads to necks
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit

Abstract

The present invention relates to the fixation brackets for the male part of a femoral prosthesis ball-joint capable of being fixed in the medullary cavity of a femur. The bracket according to the invention comprises a shaft 1 and a head 2 which is integral with the shaft, the head having a frustoconical shape along an axis of fixation 5. The shaft 1 comprises two parts 6, 7, the part 6 being limited by a concave inner side 8 and by an outer side 9 which is delimited by two surfaces, one convex 10 and one concave 11, these surfaces intersecting at an angular point 12; the part 7 defining an axis of direction of introduction 13 into the femur and being delimited by an inner side 14 and an outer side 15 which are substantially rectilinear. The point 17 common to the rectilinear outer side 15 of the part 7 and to the convex surface 10 of the second side 9 of the first part 6 is situated on the axis of fixation 5. The large base 18 of the head 2 forms a shoulder 20 via which the head 2 is integral with the first part 6, the tangent 25 at point 12 to the concave surface 10 of the side 9 intersecting the axis of fixation 5 on the small base 26 of the head 2.

Description

Patte de fixation à cimenter, pour
partie mâle d'une rotule de prothèse de hanche
La présente invention concerne les pattes destinées à être liées par ciment avec la paroi osseuse du canal médullaire des fémurs pour la fixation des parties mâles des rotules de prothèses du type fémoral.Fixing bracket to be cemented, for
male part of a hip prosthesis
The present invention relates to the legs intended to be bonded by cement with the bone wall of the medullary canal of the femurs for fixing the male parts of the ball joints of prostheses of the femoral type.

Il est déjà connu un certain nombre de réalisations de pattes de fixation pour soutenir la partie mâle d'une rotule de prothèse du type fémoral, ctest-à-dire de pattes destinées à être disposées par enfichage dans le canal médullaire du fémur. Ces pattes comportent une queue terminée par une tête de fixation sur laquelle est disposée, généralement par un emboîtement du type conique, la partie mâle de la rotule essentiellement constituée d'une portion de sphère. Les problèmes qui se posent pour la fixation d'une telle patte dans un fémur sont sa solidité et sa durée, car il est bien évident que l'on ne peut pas intervenir souvent pour la consolider, mais aussi le positionnement parfait de la patte dans l'os et sa parfaite adaptation au fémur.La fixation de ces pattes dans le fémur se fait généralement avec du ciment qui assure la liaison entre la patte et la paroi du logement réalisé dans l'os. It is already known a certain number of embodiments of fixing lugs for supporting the male part of a kneecap prosthesis of the femoral type, that is to say of legs intended to be arranged by insertion in the medullary canal of the femur. These legs include a tail terminated by a fixing head on which is disposed, generally by a conical type socket, the male part of the ball joint essentially consisting of a portion of a sphere. The problems which arise for the fixing of such a leg in a femur are its solidity and its duration, because it is quite obvious that one cannot often intervene to consolidate it, but also the perfect positioning of the leg in the bone and its perfect adaptation to the femur. The fixing of these legs in the femur is generally done with cement which ensures the connection between the leg and the wall of the housing made in the bone.

Bien que tous les fémurs humains aient sensiblement la même configuration, leurs dimensions dépendent de la morphologie des personnes et il est absolument indispensable, lors de l'implantation d'une prothèse fémorale, d'adapter la taille de chaque patte de fixation de la partie mâle de la rotule aux dimensions du canal médullaire du fémur dans lequel elle doit être mise en place, aussi bien en longueur qu'en épaisseur. Dans ce but, le chirurgien doit avoir à sa disposition une gamme de ces pattes la plus complète possible. Although all human femurs have substantially the same configuration, their dimensions depend on the morphology of the people and it is absolutely essential, when implanting a femoral prosthesis, to adapt the size of each leg of the part male of the patella the dimensions of the medullary canal of the femur in which it must be placed, both in length and in thickness. For this purpose, the surgeon must have at his disposal a range of these legs as complete as possible.

C'est ainsi que la présente invention a pour but de réaliser une patte de fixation pour une rotule de prothèse du type fémoral, qui soit apte à être aisément enfichée dans le canal médullaire du fémur et dont la structure lui assure une coopération rigide avec le fémur et une fixation fiable pendant un temps relativement long et permette, par la technique de l'usinage automatique par programmation, de réaliser chaque patte aux dimensions du canal médullaire dans lequel elle doit être enfichée, sans avoir à procéder à une modification importante du programme d'usinage, de façon à répondre rapidement et au meilleur coût à toutes les demandes des chirurgiens. This is how the present invention aims to provide a fixing lug for a prosthetic ball joint of the femoral type, which is capable of being easily inserted into the medullary canal of the femur and whose structure ensures rigid cooperation with the femur and a reliable fixation for a relatively long time and allows, by the technique of automatic programming machining, to produce each leg to the dimensions of the medullary canal in which it must be inserted, without having to make a significant modification of the program machining, so as to respond quickly and at the best cost to all surgeons' requests.

Plus précisément, la présente invention a pour objet une patte de fixation pour la partie mâle d'une rotule de prothèse fémorale apte à être fixée dans le canal médullaire d'un fémur, caractérisée par le fait qu'elle comporte
au moins une queue et une tête de fixation solidaire d'une extrémité de ladite queue,
la tête de fixation ayant une forme sensiblement tronconique et étant apte à coopérer avec la partie mâle de la rotule en définissant un axe de fixation,
ladite queue comportant deux première et deuxième parties consécutives,
- ladite première partie étant limitée par un premier côté intérieur sensiblement concave et par un second côté extérieur défini par deux surfaces respectivement sensiblement convexe et concave, ces deux surfaces se coupant suivant un point anguleux,
- ladite deuxième partie étant sensiblement conique et définissant un axe de direction d'introduction dans ledit canal médullaire, cettedite deuxième partie étant délimitée par des côtés respectivement intérieur et extérieur sensiblement rectilignes formant entre eux un angle très faible, le point commun au côté extérieur rectiligne de cette deuxième partie et de la surface convexe du second côté de la première partie étant sensiblement situé sur ledit axe de fixation,
la grande base de ladite tête de fixation formant une embase par laquelle ladite tête est solidaire de la première extrémité de la première partie, opposée à la seconde extrémité correspondant à la section de jonction de cette première partie avec la deuxième partie,
l'embase ayant un point commun respectivement avec le premier côté concave et la surface concave du second côté de la première partie,
la tangente au point anguleux la surface concave du second côté de la première partie coupant l'axe de fixation sur la petite base de la tête de fixation, l'angle entre cette tangente et ledit axe de fixation étant sensiblement égal à 30 degrés.More specifically, the subject of the present invention is a fixing lug for the male part of a femoral prosthesis patella capable of being fixed in the medullary canal of a femur, characterized in that it comprises
at least one tail and one fixing head secured to one end of said tail,
the fixing head having a substantially frustoconical shape and being able to cooperate with the male part of the ball joint by defining a fixing axis,
said tail comprising two first and second consecutive parts,
said first part being limited by a first substantially concave inner side and by a second outer side defined by two surfaces which are respectively substantially convex and concave, these two surfaces intersecting at an angular point,
said second part being substantially conical and defining an axis of direction of introduction into said medullary canal, this second part being delimited by respectively rectilinear interior and exterior sides respectively forming between them a very small angle, the point common to the rectilinear exterior side this second part and the convex surface of the second side of the first part being substantially located on said fixing axis,
the large base of said fixing head forming a base by which said head is secured to the first end of the first part, opposite the second end corresponding to the section of junction of this first part with the second part,
the base having a common point respectively with the first concave side and the concave surface of the second side of the first part,
the tangent to the angular point the concave surface of the second side of the first part intersecting the fixing axis on the small base of the fixing head, the angle between this tangent and said fixing axis being substantially equal to 30 degrees.

D'autres caractéristiques et avantages de la présente invention apparaitront au cours de la description suivante donnée en regard du dessin annexé à titre illustratif, mais nullement limitatif, dans lequel la figure unique représente, dans une vue de côté, un mode de réalisation d'une patte selon l'invention. Other characteristics and advantages of the present invention will appear during the following description given with reference to the drawing annexed by way of illustration, but in no way limiting, in which the single figure represents, in a side view, an embodiment of a tab according to the invention.

La figure unique représente une patte de fixation pour la partie mâle d'une rotule de prothèse fémorale apte à être fixée dans le canal médullaire d'un fémur. The single figure shows a fixing lug for the male part of a femoral prosthesis ball capable of being fixed in the medullary canal of a femur.

Cette patte présente un plan de symétrie, sensiblement le plan de la figure, et comporte au moins une queue 1 et une tête de fixation 2 solidaire d'une extrémité 3 de la queue. This tab has a plane of symmetry, substantially the plane of the figure, and comprises at least one tail 1 and a fixing head 2 secured to one end 3 of the tail.

La tête de fixation 2 est apte à coopérer avec la partie mâle 4 de la rotule, notamment par emboftement cône Morse. Elle est de forme sensiblement tronconique et définit un axe de fixation 5. The fixing head 2 is able to cooperate with the male part 4 of the ball joint, in particular by fitting a Morse cone. It is of substantially frustoconical shape and defines a fixing axis 5.

ta queue 1 comporte deux première 6 et deuxième 7 parties consécutives. ta première partie 6 est au moins limitée par un premier côté intérieur 8 sensiblement concave et par un second côté extérieur 9 délimité par deux surfaces respectivement sensiblement convexe 10 et concave 11 et se coupant suivant un point anguleux 12. ta deuxième partie 7 est sensiblement conique et définit un axe 13 de direction d'introduction dans le canal médullaire. Cette deuxième partie 7 est en outre délimitée par des côtés respectivement intérieur 14 et extérieur 15 sensiblement rectilignes formant entre eux un angle 16 très faible. Le point 17 commun au côté extérieur 15 rectiligne de la deuxième partie 7 et à la surface convexe 10 du second côté 9 de la première partie 6 est sensiblement situé sur l'axe de fixation 5. your tail 1 has two first 6 and second 7 consecutive parts. your first part 6 is at least limited by a first interior side 8 which is substantially concave and by a second external side 9 delimited by two surfaces which are respectively substantially convex 10 and concave 11 and which intersect at an angular point 12. your second part 7 is substantially conical and defines an axis 13 of direction of introduction into the medullary canal. This second part 7 is further delimited by respectively internal 14 and external 15 sides which are substantially rectilinear forming between them a very small angle 16. The point 17 common to the rectilinear external side 15 of the second part 7 and to the convex surface 10 of the second side 9 of the first part 6 is substantially located on the fixing axis 5.

ta grande base 18 de la tête de fixation 2 forme une embase 20 par laquelle la tête 2 est solidaire de la première extrémité 3 de la première partie 6 de la queue 1, opposée à la seconde extrémité 21 de cette première partie, correspondant à la section de jonction 22 de la première partie 6 avec la deuxième partie 7. your large base 18 of the fixing head 2 forms a base 20 by which the head 2 is integral with the first end 3 of the first part 6 of the tail 1, opposite the second end 21 of this first part, corresponding to the junction section 22 of the first part 6 with the second part 7.

L'embase 20 a un point commun 23, 24 respectivement avec le premier côté concave 8 et la surface concave ll du second côté 9 de la première partie 6. The base 20 has a common point 23, 24 respectively with the first concave side 8 and the concave surface ll of the second side 9 of the first part 6.

De plus, la tangente 25 au point anguleux 12 à la surface concave 11 du second côté 9 de la première partie de la queue coupe l'axe de fixation 5 sur la petite base 26 de la tête de fixation 2. In addition, the tangent 25 at the angular point 12 to the concave surface 11 of the second side 9 of the first part of the tail intersects the fixing axis 5 on the small base 26 of the fixing head 2.

Avantageusement, l'angle 27 entre cette tangente 25 et l'axe de fixation 5 est sensiblement égal à 30 degrés.Advantageously, the angle 27 between this tangent 25 and the fixing axis 5 is substantially equal to 30 degrees.

Une telle configuration de patte de prothèse fémorale permet de réaliser facilement une gamme complète de ce type de patte, par exemple comme celle schématiquement illustrée sur la figure. En effet, il suffit de déterminer l'emplacement à donner aux deux points 12 et 17 pour obtenir la forme définitive de la patte, l'extrémité inférieure 40 de la deuxième partie 7 de la queue se déduisant automatiquement de la position de ces deux points puisque les deux cotés 14 et 15 sont rectilignes. Such a configuration of the femoral prosthesis leg makes it possible to easily produce a full range of this type of leg, for example like that schematically illustrated in the figure. Indeed, it suffices to determine the location to be given to the two points 12 and 17 to obtain the final shape of the tab, the lower end 40 of the second part 7 of the tail automatically deducing from the position of these two points since the two sides 14 and 15 are rectilinear.

La détermination du programme pour la commande des machines d'usinage pour la réalisation de ces pattes de prothèses est donc relativement facile et le nombre de paramètres à modifier pour réaliser l'ensemble de la gamme est faible. Determining the program for controlling the machining machines for producing these prosthetic tabs is therefore relatively easy and the number of parameters to be modified in order to produce the entire range is small.

De plus, cette structure permet au chirurgien d'obtenir, avec un seul concept de patte de prothèse, la meilleure solution de rénovation qu'il recherche, quelles que soient les contraintes anatomiques et pathologiques, en remplissant au mieux la diaphyse fémorale et en reconstruisant le bras de levier le plus correct possible. Ces prothèses s'implantent indifféremment du côté droit ou gauche, laissant au chirurgien le soin de régler leur antéversion en fonction des conditions locales et le choix, dans la gamme complète de pattes mises à sa disposition pour un coût de revient relativement faible, la patte qui convient le mieux quant à ses dimensions.  In addition, this structure allows the surgeon to obtain, with a single concept of prosthesis leg, the best renovation solution he is looking for, whatever the anatomical and pathological constraints, by best filling the femoral shaft and reconstructing the most correct lever arm possible. These prostheses are installed either on the right or left side, leaving it to the surgeon to adjust their anteversion according to local conditions and the choice, in the full range of legs available to him for a relatively low cost, the leg that best suits its dimensions.

Claims (1)

REVENDICATION Patte de fixation pour la partie mâle d'une rotule de prothèse fémorale apte à être fixée dans le canal médullaire d'un fémur, caractérisée par le fait qu'elle comporte au moins une queue (1) et une tête de fixation (2) solidaire d'une extrémité (3) de ladite queue, la tête de fixation (2) ayant une forme sensiblement tronconique et étant apte à coopérer avec la partie mâle (4) de la rotule en définissant un axe de fixation (5), ladite queue (1) comportant deux première (6) et deuxième (7) parties consécutives, - ladite première partie (6) étant limitée par un premier coté intérieur (8) sensiblement concave et par un second coté extérieur (9) défini par deux surfaces respectivement sensiblement convexe (10) et concave (11) et se coupant suivant un point anguleux (12) > - ladite deuxième partie (7) étant sensiblement conique et définissant un axe de direction (13) d'introduction dans ledit canal médullaire, ladite deuxième partie (7) étant délimitée par des côtés respectivement intérieur (14) et extérieur (15) sensiblement rectilignes formant entre eux un angle (16) très faible, le point commun (17) au côté extérieur (15) rectiligne de la deuxième partie (7) et de la surface convexe (10) du second coté (9) de la première partie (6) étant sensiblement situé sur ledit axe de fixation (5), la grande base (18) de ladite tête de fixation (2) formant une embase (20) par laquelle ladite tête (2) est solidaire de la première extrémité (3) de la première partie, opposée à la seconde extrémité (21) correspondant à la section de jonction (22) de la première partie (6) avec la deuxième partie (7), l'embase (20) ayant un point commun (23,CLAIM Attachment leg for the male part of a femoral prosthesis ball capable of being fixed in the medullary canal of a femur, characterized in that it comprises at least one tail (1) and a fixing head (2 ) integral with one end (3) of said tail, the fixing head (2) having a substantially frustoconical shape and being able to cooperate with the male part (4) of the ball joint by defining a fixing axis (5), said tail (1) comprising two first (6) and second (7) consecutive parts, - said first part (6) being limited by a first inner side (8) substantially concave and by a second outer side (9) defined by two respectively substantially convex (10) and concave (11) and intersecting surfaces at an angular point (12)> - said second part (7) being substantially conical and defining a direction axis (13) for introduction into said medullary canal, said second part (7) was nt delimited by respectively internal (14) and external (15) sides which are substantially rectilinear forming between them a very slight angle (16), the common point (17) on the rectilinear external side (15) of the second part (7) and of the convex surface (10) of the second side (9) of the first part (6) being substantially located on said fixing axis (5), the large base (18) of said fixing head (2) forming a base (20 ) by which said head (2) is integral with the first end (3) of the first part, opposite the second end (21) corresponding to the junction section (22) of the first part (6) with the second part (7), the base (20) having a common point (23, 24) respectivement avec le premier côté concave (8) et la surface concave (11) du second côté (9) de la première partie (6), 24) respectively with the first concave side (8) and the concave surface (11) of the second side (9) of the first part (6), la tangente (25) au point anguleux (12) à la surface concave (10) du second côté (9) de la première partie coupant l'axe de fixation (5) sur la petite base (26) de la tête de fixation (2), l'angle (27) entre cette tangente (25) et ledit axe de fixation (5) étant sensiblement égal à 30 degrés.  the tangent (25) at the angular point (12) to the concave surface (10) of the second side (9) of the first part cutting the fixing axis (5) on the small base (26) of the fixing head ( 2), the angle (27) between this tangent (25) and said fixing axis (5) being substantially equal to 30 degrees.
FR9107767A 1991-06-25 1991-06-25 FIXING PLATE TO BE CEMENTED, FOR THE MALE PART OF A HIP PROSTHESIS BALL JOINT. Expired - Lifetime FR2678161B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9107767A FR2678161B3 (en) 1991-06-25 1991-06-25 FIXING PLATE TO BE CEMENTED, FOR THE MALE PART OF A HIP PROSTHESIS BALL JOINT.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9107767A FR2678161B3 (en) 1991-06-25 1991-06-25 FIXING PLATE TO BE CEMENTED, FOR THE MALE PART OF A HIP PROSTHESIS BALL JOINT.

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FR2678161A1 true FR2678161A1 (en) 1992-12-31
FR2678161B3 FR2678161B3 (en) 1993-10-01

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FR9107767A Expired - Lifetime FR2678161B3 (en) 1991-06-25 1991-06-25 FIXING PLATE TO BE CEMENTED, FOR THE MALE PART OF A HIP PROSTHESIS BALL JOINT.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0669115A1 (en) * 1994-02-25 1995-08-30 Fehling Medical Ag Total hip endoprothesis
FR2729292A1 (en) * 1995-01-12 1996-07-19 Medinov Sa Modular assembly of femoral rods for prosthetic hips

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0669115A1 (en) * 1994-02-25 1995-08-30 Fehling Medical Ag Total hip endoprothesis
FR2729292A1 (en) * 1995-01-12 1996-07-19 Medinov Sa Modular assembly of femoral rods for prosthetic hips

Also Published As

Publication number Publication date
FR2678161B3 (en) 1993-10-01

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