FR2616060A1 - Hip prosthesis with variable epiphyseal part - Google Patents

Hip prosthesis with variable epiphyseal part Download PDF

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Publication number
FR2616060A1
FR2616060A1 FR8707962A FR8707962A FR2616060A1 FR 2616060 A1 FR2616060 A1 FR 2616060A1 FR 8707962 A FR8707962 A FR 8707962A FR 8707962 A FR8707962 A FR 8707962A FR 2616060 A1 FR2616060 A1 FR 2616060A1
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France
Prior art keywords
rod
epiphyseal
diaphyseal
femoral
part according
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Granted
Application number
FR8707962A
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French (fr)
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FR2616060B1 (en
Inventor
Alain Tornier
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Tornier SAS
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Tornier SAS
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Publication of FR2616060B1 publication Critical patent/FR2616060B1/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
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic 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
    • 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
    • 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
    • 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
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30433—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels, rivets or washers e.g. connecting screws
    • 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
    • A61F2002/3652—Connections of necks to 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
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0033—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • 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
    • A61F2220/0041—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws

Landscapes

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

Abstract

It comprises two elements assembled together, namely a diaphyseal rod 1 and an epiphyseal body 2 of variable height. The upper part of the rod 1 is provided with an off-set collar 11 carrying a conical adaptor 16 indented to engage in a complementary bore 23 of the body 2, in order to assemble the latter with the rod. The outer edge 22 of the body and the generatrix 13 of the rod are aligned. The body comprises an oblique stud 21 intended to support the artificial femoral head 3.

Description

La présente invention est relative à une prothèse totale de hanche perfectionnée. The present invention relates to an improved total hip prosthesis.

On sait que par suite de lésions diverses, il est parfois nécessaire de remplacer la tête fémorale naturelle par une prothèse qui coopère soit avec le cotyle naturel du patient, soit avec un cotyle artificiel. It is known that as a result of various lesions, it is sometimes necessary to replace the natural femoral head with a prosthesis which cooperates either with the patient's natural acetabulum, or with an artificial acetabulum.

Dans le cas de reprise de prothèse ancienne descellée, la partie supérieure du fémur s'est résorbée. Comme la partie considérée de la prothèse va être en contact avec la partie résorbée du fémurs il faut prévoir une prothèse plus longue puisque son assise se trouve plus basse que celle d'origine. In the case of resumption of old loosened prosthesis, the upper part of the femur is absorbed. As the considered part of the prosthesis will be in contact with the resorbed part of the femurs, a longer prosthesis must be provided since its seat is lower than the original one.

Suivant les individus, la dimension du canal médullaire du fémur est différente, de telle sorte que l'implant doit présenter des diamètres de fût fémoral variables. Depending on the individual, the size of the medullary canal of the femur is different, so that the implant must have variable diameters of the femoral shaft.

Four pouvoir couvrir l'ensemble des prothèses requises par les indications chirurgicales, il est nécessaire de posséder un ensemble de modèles importants avec des diamètres de fût fémoral variables et des hauteurs différentes de celui-ci, ce qui nécessite un stock considérable entrainant une immobilisation très importante de fonds
les perfectionnements qui font l'objet de la présente invention visent à remédier à ces inconvénients et à permettre la réalisation de la partie fémorale d'une prothese de hanche qui soit réalisée en deux parties pour permettre de couvrir ltensemble des cas chrirurgicaux qui peuvent se présenter, sans avoir à posséder un stock important de matériel.To be able to cover all the prostheses required by surgical indications, it is necessary to have a large set of models with variable femoral barrel diameters and different heights, which requires a considerable stock leading to very immobilization. important fund
the improvements which are the subject of the present invention aim to remedy these drawbacks and to allow the production of the femoral part of a hip prosthesis which is produced in two parts to allow covering all the surgical cases which may arise , without having to have a large stock of equipment.

A cet effet, la partie fémorale suivant l'invention est composée de deux éléments assemblés, soit une tige diaphysaire et un corps épiphysaire de hauteur variable, des moyens étant prévus pour assujettir ces deux éléments longi#tudinalement et angulairement, tandis que ledit corps comporte la tête sphérique fémorale usuelle. To this end, the femoral part according to the invention is composed of two assembled elements, namely a diaphyseal rod and an epiphyseal body of variable height, means being provided for securing these two elements longitudinally and angularly, while said body comprises the usual femoral spherical head.

Les deux éléments sont réunis au moyen d'un assemblage à cane morse, tandis qu'un ergot de la tige pénètre dans un trou du corps pour constituer le blocage angulaire des deux éléments considérés. The two elements are joined by means of a morse cane assembly, while a lug of the rod penetrates into a hole in the body to constitute the angular blocking of the two elements considered.

L'axe géométrique de l'embout mâle de la tige diaphysaire qui sert à l'assemblage du corps épiphysaire se trouve à une distance constante de la génératrice externe de ladite tige qui se trouve alignée avec la face correspondante du corps diaphysaire, cet axe étant déporté vers l'intérieur par rapport à celui de ladite tige. The geometric axis of the male end of the diaphyseal rod which is used to assemble the epiphyseal body is at a constant distance from the external generatrix of said rod which is aligned with the corresponding face of the diaphyseal body, this axis being offset inwardly from that of said rod.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer
Fig. 1 est une vue en perspective de la partie fémorale d'une prothèse de hanche établie conformément à l'invention.The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing.
Fig. 1 is a perspective view of the femoral part of a hip prosthesis established in accordance with the invention.

Fig. 2 en est une vue éclatée avec arrachements. Fig. 2 is an exploded view with parts broken away.

Fig. 3 est une coupe suivant III-III (fig. 2). Fig. 3 is a section along III-III (fig. 2).

On a illustré en fig. 1 la partie fémorale d'une prothèse de hanche établie conformément à l'invention et comprenant deux elements, soit une tige diaphysaire 1 et un corps épiphysaire 2. La tige diaphysaire 1 est destinée à être engagée dans le canal médullaire du fémur s'étendant dans la diaphyse de celui-ci, tandis que le corps épiphysaire 2 dépasse au-delà de la coupe distale pour porter un pion conique 21 destiné à recevoir la sphère formant la prothèse de tête fémorale et qu'on a référencée 3 en fig. 2. Bien entendu, cette sphère pourrait faire directement partie du corps 2. Illustrated in fig. 1 the femoral part of a hip prosthesis established in accordance with the invention and comprising two elements, namely a diaphyseal rod 1 and an epiphyseal body 2. The diaphyseal rod 1 is intended to be engaged in the medullary canal of the femur extending in the shaft of the latter, while the epiphyseal body 2 protrudes beyond the distal section to carry a conical pin 21 intended to receive the sphere forming the prosthesis of the femoral head and which has been referenced 3 in fig. 2. Of course, this sphere could be directly part of the body 2.

L'extrémité de la tige diaphysaire 1 est légèrement taillée en forme de pointe pour faciliter son introduction dans le canal médullaire, tandis que son extrémité opposée est épanouie pour constituer une collerette 11 réunie à ladite tige par un congé important 12. On observe que la collerette est déportée latéralement par rapport à la tige 1, l'une de ses extrémités affleurant la génératrice externe 13 de ladite tige. La face de la collerette 11 opposée à la tige 1 est plane et à partir de cette face se dresse d'une part un embout conique 14, d'autre part un ergot 15. L'embout 14 présente un axe géométrique légèrement décalé vers l'intérieur par rapport à l'axe géométrique de la tige 1 de telle sorte qu'il soit possible, quel que soit le diamètre de cette dernière, d'avoir une interchangeabilité du corps 2.On note que le centre de l'embout 14 est pourvu d'un trou taraudé 16. The end of the diaphyseal rod 1 is slightly cut in the shape of a point to facilitate its introduction into the medullary canal, while its opposite end is expanded to form a flange 11 joined to said rod by a significant leave 12. It can be observed that the the collar is offset laterally relative to the rod 1, one of its ends being flush with the external generator 13 of the said rod. The face of the flange 11 opposite the rod 1 is planar and from this face stands on the one hand a conical end piece 14, on the other hand a lug 15. The end piece 14 has a geometric axis slightly offset towards the inside with respect to the geometrical axis of the rod 1 so that it is possible, whatever the diameter of the latter, to have interchangeability of the body 2. It is noted that the center of the end piece 14 has a threaded hole 16.

Le corps diaphysaire 2 présente en profil en plan une forme semblable à celle de la collerette 11 de la tige diaphysaire 1 (fig. 3), c'est-à-dire que la génératrice extérieure 22 de la face de ce corps se trouvant à l'opposé du pion 21 est dans l'alignement de la génératrice 14 de la tige 1. Dans ces conditions, quels que soient le corps épiphysaire 2 et la longueur de son pion 21, la génératrice 22 de ce dernier se trouve toujours en alignement avec la génératrice 13 de la tige 1, même lorsque l'on note des variations de diamètre de cette dernière. De cette manière, la partie extérieure du corps épiphysaire 2, représentée par sa face contenant la génératrice 22, ne peut pas venir buter sur le grand trochanter, de telle sorte que celui-ci peut être conservé dans sa totalité, ce qui n'est pas le cas dans beaucoup de prothèses usuelles. The diaphyseal body 2 has in profile in plan a shape similar to that of the flange 11 of the diaphyseal rod 1 (fig. 3), that is to say that the external generator 22 of the face of this body being at the opposite of the pin 21 is in alignment with the generator 14 of the rod 1. Under these conditions, whatever the epiphyseal body 2 and the length of its pin 21, the generator 22 of the latter is always in alignment with the generator 13 of the rod 1, even when variations in the diameter of the latter are noted. In this way, the outer part of the epiphyseal body 2, represented by its face containing the generatrix 22, cannot abut on the greater trochanter, so that it can be preserved in its entirety, which is not not the case in many common prostheses.

Le corps diaphysaire 2 comporte un alésage central conique 23 dont la pente est de tordre de 50, de manière que l'assemblage de l'embout 16 et de cet alésage soit coinçant lorsque l'embout est engagé dans l'alésage. De manière à déterminer parfaitement l'orientation du pion 21 par rapport à la tige 1, on prévoit de ménager dans le corps un trou 24 dans lequel vient s'engager l'ergot 15 de la tige 1, lorsque le corps est assemblé à cette dernière. The diaphyseal body 2 has a conical central bore 23 whose slope is to twist 50, so that the assembly of the end piece 16 and this bore is wedging when the end piece is engaged in the bore. In order to perfectly determine the orientation of the pin 21 relative to the rod 1, provision is made to provide a hole in the body 24 into which the lug 15 of the rod 1 engages, when the body is assembled to this last.

On note encore que le fond de l'alésage borgne 23 comporte une ouverture 25 que traverse une vis 4 qui vient s'engager dans le trou taraudé 16 de manière à assurer une sécurité de l'assemblage du corps épiphysaire et de la tige diaphysaire. We also note that the bottom of the blind bore 23 has an opening 25 through which a screw 4 which engages in the threaded hole 16 so as to ensure security of the assembly of the epiphyseal body and the diaphyseal rod.

Grâce à la présence du-congé 12 qui assure la liaison entre la collerette et la tige 2, on obtient une assise dont les épaisseurs sont suffisantes au regard des contraintes auxquelles la tige 1 est soumise. Thanks to the presence of the leave 12 which provides the connection between the collar and the rod 2, a seat is obtained whose thicknesses are sufficient with regard to the constraints to which the rod 1 is subjected.

Enfin, le corps diaphysaire 2 est encore pourvu de deux trous 26 et 27 qui permettent de passer #es fils destinés a éventuellement refixer les trochanters lorsque cela est nécessaire.Finally, the diaphyseal body 2 is also provided with two holes 26 and 27 which make it possible to pass #the wires intended to optionally re-attach the trochanters when necessary.

Il doit d'ailleurs être entendu que la description qui précède n'a été donnée qu'a titre d'exemple et qu'elle ne limite nullement le domaine de l'invention dont on ne sortirait pas en remplaçant les détails d'exécution décrits par tous autres équivalents.  It should also be understood that the foregoing description has been given only by way of example and that it in no way limits the field of the invention from which one would not depart by replacing the execution details described by all other equivalents.

Claims (7)

REVENDICATIONS 1. Partie fémorale d'une prothèse de hanche, caractérisée en ce qu'elle est composée de deux éléments assemblés, soit une tige diaphysaire (1) et un corps épiphysaire (2) de hauteur variable, des moyens (14, 23) étant prévus pour assujettir ces deux éléments longitudinalement et angulairement tandis que ledit corps (2) comporte la tête sphérique fémorale (3) usuelle. 1. Femoral part of a hip prosthesis, characterized in that it is composed of two assembled elements, namely a diaphyseal rod (1) and an epiphyseal body (2) of variable height, means (14, 23) being provided for securing these two elements longitudinally and angularly while said body (2) comprises the usual femoral spherical head (3). 2. Partie fémorale suivant la revendication 1, caractérisée en ce que la tige diaphysaire (1) comporte une collerette supérieure (11) extrême épaisse déportée latéralement et raccordée à la tige par un congé important (12). 2. Femoral part according to claim 1, characterized in that the diaphyseal rod (1) comprises an upper thick flange (11) offset laterally and connected to the rod by a large fillet (12). 3. Partie fémorale suivant la revendication 2, caractérisée en ce que son corps épiphysaire (2) présente une face externe (22) dont la génératrice extrême est alignée avec la génératrice externe (13) de la tige diaphysaire (1). 3. femoral part according to claim 2, characterized in that its epiphyseal body (2) has an external face (22) whose extreme generatrix is aligned with the external generatrix (13) of the diaphyseal rod (1). 4. Partie fémorale suivant la revendication 1, caractérisée en ce que ses deux éléments (1, 2) sont réunis au moyen d'un assemblage à cône morse (14, 23), tandis qu'un ergot (15) de la tige (11) pénètre dans un trou (24) du corps (2). 4. femoral part according to claim 1, characterized in that its two elements (1, 2) are joined by means of a Morse taper assembly (14, 23), while a lug (15) of the rod ( 11) enters a hole (24) in the body (2). 5. Partie fémorale suivant la revendication 4, caractérisée en ce que l'alésage conique (23) du corps épiphysaire (2) qui reçoit un embout correspondant (14) de la tige diaphysaire (1) est borgne, son fond étant traversé par une vis (4) qui s'engage dans un trou taraudé (16) dudit embout (14). 5. femoral part according to claim 4, characterized in that the conical bore (23) of the epiphyseal body (2) which receives a corresponding end piece (14) of the diaphyseal rod (1) is blind, its bottom being crossed by a screw (4) which engages in a threaded hole (16) of said end piece (14). 6. Partie fémorale suivant la revendication 5, caractérisée en ce que l'axe géométrique de l'embout (14) de la tige diaphysaire (1) se trouve déporté vers l'intérieur par rapport à celui de ladite tige. 6. femoral part according to claim 5, characterized in that the geometric axis of the end piece (14) of the diaphyseal rod (1) is offset inwardly relative to that of said rod. 7. Partie fémorale suivant la revendication 1, caractérisée en ce que le corps épiphysaire (2) porte# un pion (21) destiné à la fixation de la sphère (3) formant la prothèse de la tête fémorale.  7. femoral part according to claim 1, characterized in that the epiphyseal body (2) carries # a pin (21) intended for the fixing of the sphere (3) forming the prosthesis of the femoral head.
FR8707962A 1987-06-03 1987-06-03 HIP PROSTHESIS WITH VARIABLE EPIPHYSIS Expired - Lifetime FR2616060B1 (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310566A2 (en) * 1987-08-03 1989-04-05 G. CREMASCOLI S.p.A. Adaptable hip prosthesis
EP0368488A1 (en) * 1988-10-18 1990-05-16 University College London Attachment device for an endoprosthesis
EP0433121A1 (en) * 1989-12-12 1991-06-19 Michael J. Pappas Prosthetic device with modular stem
US5074879A (en) * 1990-10-26 1991-12-24 Pappas Michael J Prosthetic device with modular stem
FR2673832A1 (en) * 1991-03-11 1992-09-18 Serf Femoral element for a hip prosthesis
FR2677879A1 (en) * 1991-06-21 1992-12-24 Medical Op Mechanical attachment system for joining components of variable angulation and variable height, referred to as multi-angular, and more particularly intended for a total hip prosthesis
EP0634154A1 (en) * 1993-07-16 1995-01-18 MEC HINT S.r.l. Improvement in the locking among the components of a multicomponent prosthesis for use in traumatology, orthopedics and veterinary medicine
US6383226B1 (en) * 1998-06-09 2002-05-07 The Board Of Trustees Of The Leland Stanford Junior University Prostheses having curvilinear collars
US6974483B2 (en) 1998-04-14 2005-12-13 Encore Medical Corporation Modular neck for femur replacement surgery

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366005A2 (en) * 1976-07-28 1978-04-28 Mahay Cie Hip joint replacement prosthesis - has separate socket portion fixed to hip bone by screw at junction rebated into top of bone
EP0000549A1 (en) * 1977-07-29 1979-02-07 Bayer Ag Endoprosthesis
GB2070939A (en) * 1980-03-11 1981-09-16 Howmedica Prosthetic joint
FR2501998A1 (en) * 1981-03-17 1982-09-24 Babin Chevaye Jean Prosthetic hip joint with cylindrical metaphysary zone - has fixing plate inclined to axis of femoral medullary canal above oval-section diaphysary zone
EP0061993A1 (en) * 1981-04-01 1982-10-06 Mecron Medizinische Produkte Gmbh Joint prosthesis
FR2580171A1 (en) * 1985-04-10 1986-10-17 Rambert Andre Femoral part for hip joint prosthesis
FR2606273A1 (en) * 1986-11-10 1988-05-13 Collomb Jean Improved joint prosthesis

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2366005A2 (en) * 1976-07-28 1978-04-28 Mahay Cie Hip joint replacement prosthesis - has separate socket portion fixed to hip bone by screw at junction rebated into top of bone
EP0000549A1 (en) * 1977-07-29 1979-02-07 Bayer Ag Endoprosthesis
GB2070939A (en) * 1980-03-11 1981-09-16 Howmedica Prosthetic joint
FR2501998A1 (en) * 1981-03-17 1982-09-24 Babin Chevaye Jean Prosthetic hip joint with cylindrical metaphysary zone - has fixing plate inclined to axis of femoral medullary canal above oval-section diaphysary zone
EP0061993A1 (en) * 1981-04-01 1982-10-06 Mecron Medizinische Produkte Gmbh Joint prosthesis
FR2580171A1 (en) * 1985-04-10 1986-10-17 Rambert Andre Femoral part for hip joint prosthesis
FR2606273A1 (en) * 1986-11-10 1988-05-13 Collomb Jean Improved joint prosthesis

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310566A2 (en) * 1987-08-03 1989-04-05 G. CREMASCOLI S.p.A. Adaptable hip prosthesis
EP0310566A3 (en) * 1987-08-03 1989-12-20 G. Cremascoli S.P.A. Adaptable hip prosthesis
EP0368488A1 (en) * 1988-10-18 1990-05-16 University College London Attachment device for an endoprosthesis
US5080676A (en) * 1988-10-18 1992-01-14 University College London Attachment device
EP0433121A1 (en) * 1989-12-12 1991-06-19 Michael J. Pappas Prosthetic device with modular stem
US5074879A (en) * 1990-10-26 1991-12-24 Pappas Michael J Prosthetic device with modular stem
FR2673832A1 (en) * 1991-03-11 1992-09-18 Serf Femoral element for a hip prosthesis
FR2677879A1 (en) * 1991-06-21 1992-12-24 Medical Op Mechanical attachment system for joining components of variable angulation and variable height, referred to as multi-angular, and more particularly intended for a total hip prosthesis
EP0634154A1 (en) * 1993-07-16 1995-01-18 MEC HINT S.r.l. Improvement in the locking among the components of a multicomponent prosthesis for use in traumatology, orthopedics and veterinary medicine
US6974483B2 (en) 1998-04-14 2005-12-13 Encore Medical Corporation Modular neck for femur replacement surgery
US6383226B1 (en) * 1998-06-09 2002-05-07 The Board Of Trustees Of The Leland Stanford Junior University Prostheses having curvilinear collars

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