FR2817733A1 - Hip prosthesis with femoral component and cotyloid cup has axis of femoral shank neck and head passing through anatomical axis of rotation - Google Patents

Hip prosthesis with femoral component and cotyloid cup has axis of femoral shank neck and head passing through anatomical axis of rotation Download PDF

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Publication number
FR2817733A1
FR2817733A1 FR0101492A FR0101492A FR2817733A1 FR 2817733 A1 FR2817733 A1 FR 2817733A1 FR 0101492 A FR0101492 A FR 0101492A FR 0101492 A FR0101492 A FR 0101492A FR 2817733 A1 FR2817733 A1 FR 2817733A1
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Prior art keywords
axis
femoral
femoral component
location
rotation
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Granted
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FR0101492A
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French (fr)
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FR2817733B1 (en
Inventor
Minguelita Marcolina Lourens
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Fedan N B N V
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Fedan N B N V
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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
    • A61F2/32—Joints for the hip
    • 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
    • A61F2/34—Acetabular cups
    • 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
    • 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
    • A61F2002/3652—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

Landscapes

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

Abstract

The hip prosthesis, comprising a femoral shank (1) and a cotyloid cup, has a head and neck component fitted to a cavity (4) in the shank with its axis (5) in line with the anatomical axis of rotation, the cavity being offset from the median edge of the shank.

Description

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La présente invention concerne une prothèse de hanche avec composant fémoral et cavité cotyloïde associée, pour mise en place sans ciment.  The present invention relates to a hip prosthesis with femoral component and associated acetabular cavity, for placement without cement.

Les prothèses de hanche comprennent généralement un composant fémoral qui est destiné à être introduit, après résection de la tête du fémur, à l'intérieur du fémur lui-même, et qui s'accouple, au moyen de sa tête sphérique, dans une cavité cotyloïde qui, pour sa part, est introduite dans l'os du bassin, de manière à remplacer l'articulation du fémur sur le bassin.  Hip prostheses generally include a femoral component which is intended to be introduced, after resection of the head of the femur, inside the femur itself, and which mates, by means of its spherical head, in a cavity acetabulum which, for its part, is introduced into the bone of the pelvis, so as to replace the joint of the femur on the pelvis.

Le composant fémoral est formé par une tige effilée dont la portion proximale, c'est-à-dire la portion destinée à être accouplée avec la cavité cotyloïde au moyen d'un col amovible, présente une région de section plus grande que dans sa portion distale, de manière à bloquer le composant fémoral dans le canal fémoral.  The femoral component is formed by a tapered rod whose proximal portion, that is to say the portion intended to be coupled with the acetabular cavity by means of a removable neck, has a region of section larger than in its portion distal, so as to block the femoral component in the femoral canal.

Toutefois, comme les canaux fémoraux varient d'un patient à l'autre et peuvent être soit de type en substance droit soit de type évasé à la partie supérieure, il arrive que l'introduction de la tige dans le canal fémoral produise des effets différents selon le type de canal dans lequel la tige est introduite.  However, as the femoral canals vary from patient to patient and can be either of a substantially straight type or of a flared type at the top, it can happen that the introduction of the rod into the femoral canal produces different effects depending on the type of channel into which the rod is inserted.

En effet, si le canal est de type droit, l'introduction de la tige dans ce canal impliquerait le logement de cette tige dans celui-ci jusqu'à une profondeur déterminée de ce canal. Au contraire, si le canal est de type évasé, l'introduction de la même tige dans ce canal impliquerait une plus grande introduction de la tige dans celui-ci et il y aurait donc un désaxage important entre le centre de rotation anatomique et l'axe de l'emplacement prévu au niveau de l'extrémité proximale de la tige et destiné à recevoir le col amovible.  Indeed, if the channel is of the straight type, the introduction of the rod into this channel would involve the housing of this rod in the latter up to a determined depth of this channel. On the contrary, if the channel is of the flared type, the introduction of the same rod into this channel would imply a greater introduction of the rod into it and there would therefore be a significant offset between the anatomical center of rotation and the axis of the location provided at the proximal end of the rod and intended to receive the removable neck.

L'articulation du fémur avec le bassin ne serait donc pas optimale, puisque l'axe de l'emplacement du logement du col amovible ne serait pas dans l'axe avec le centre idéal de rotation anatomique de la tête du fémur.  The articulation of the femur with the pelvis would therefore not be optimal, since the axis of the location of the removable neck housing would not be in line with the ideal center of anatomical rotation of the head of the femur.

De plus, les prothèses de hanche de type connu comprennent un second élément, c'est-à-dire la cavité cotyloïde, qui est destinée à reconstituer dans l'os du bassin l'emplacement dans lequel s'engage la tête du fémur reconstruite.  In addition, hip prostheses of known type include a second element, that is to say the acetabular cavity, which is intended to reconstitute in the pelvic bone the location in which the head of the reconstructed femur engages. .

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Cette cavité cotyloïde est généralement réalisée par un élément hémisphérique sur la surface externe duquel sont prévues des ailettes anti-rotation destinées à empêcher que la cavité cotyloïde, une fois introduite dans l'os du bassin, puisse effectuer une rotation du fait que la tête reconstruite du fémur se trouve à l'intérieur.  This acetabular cavity is generally produced by a hemispherical element on the external surface of which are provided anti-rotation fins intended to prevent the acetabular cavity, once introduced into the pelvic bone, from being able to rotate due to the fact that the reconstructed head the femur is inside.

Les ailettes anti-rotation sont généralement réalisées de manière à s'étendre depuis le plan diamétral de l'élément hémisphérique, dans le sens radial par rapport à ce plan, en s'effilant vers le pôle de la cavité cotyloïde.  The anti-rotation fins are generally produced so as to extend from the diametral plane of the hemispherical element, in the radial direction relative to this plane, tapering towards the pole of the acetabular cavity.

Cette solution empêche d'une part la rotation de la cavité cotyloïde à l'intérieur de l'os du bassin, mais d'autre part, comme la cavité cotyloïde est introduite en oblique dans l'os, les ailettes peuvent sortir de l'emplacement dans lequel cette cavité est engagée et donc détériorer les surfaces environnantes.  This solution prevents on the one hand the rotation of the acetabular cavity inside the pelvic bone, but on the other hand, as the acetabular cavity is introduced obliquely into the bone, the fins can come out of the location in which this cavity is engaged and therefore deteriorate the surrounding surfaces.

La présente invention a donc pour principal but de réaliser une prothèse de hanche avec composant fémoral et cavité cotyloïde associée, dans laquelle le composant fémoral s'adapte aux canaux fémoraux de conformation en majorité évasée.  The main object of the present invention is therefore to produce a hip prosthesis with a femoral component and associated acetabular cavity, in which the femoral component adapts to the femoral channels of conformation which are mostly flared.

Dans le cadre de ce but, la présente invention doit réaliser une prothèse de hanche avec composant fémoral et cavité cotyloïde associée, dans laquelle le composant fémoral soit de nature à réaliser un parfait alignement entre l'axe de l'emplacement du logement du col amovible dans la tige du composant fémoral et le centre idéal de rotation anatomique.  Within the framework of this aim, the present invention must produce a hip prosthesis with femoral component and associated acetabular cavity, in which the femoral component is such as to achieve perfect alignment between the axis of the location of the removable neck housing. in the stem of the femoral component and the ideal center of anatomical rotation.

Un autre but de la présente invention consiste à réaliser une prothèse de hanche avec composant fémoral et cavité cotyloïde associée, dans laquelle la cavité cotyloïde est réalisée de manière à ne pas détériorer les tissus environnant l'emplacement du logement de cette cavité dans l'os du bassin.  Another object of the present invention consists in producing a hip prosthesis with femoral component and associated acetabular cavity, in which the acetabular cavity is produced so as not to damage the tissues surrounding the location of the housing of this cavity in the bone of the pelvis.

Un autre but de l'invention consiste à réaliser une prothèse de hanche qui se mette en place sans ciment.  Another object of the invention consists in producing a hip prosthesis which is put in place without cement.

La présente invention a également pour but de réaliser une prothèse de hanche, qui soit d'une fiabilité élevée, d'une réalisation relativement simple et d'un coût compétitif.  The present invention also aims to produce a hip prosthesis, which is of high reliability, of relatively simple production and of competitive cost.

La présente invention a pour objet une prothèse de hanche avec composant fémoral et cavité cotyloïde associée, le composant fémoral comportant, au niveau de  The present invention relates to a hip prosthesis with femoral component and associated acetabular cavity, the femoral component comprising, at the level of

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sa tête, un emplacement pour le logement d'un col amovible permettant l'accouplement avec la cavité cotyloïde, caractérisée en ce que ledit emplacement est réalisé de manière que son axe passe par le centre de rotation anatomique, cet emplacement étant décalé par rapport au bord médian de la tige du composant fémoral.  its head, a location for housing a removable neck allowing coupling with the acetabular cavity, characterized in that said location is made so that its axis passes through the center of anatomical rotation, this location being offset from the median edge of the stem of the femoral component.

D'autres caractéristiques et avantages de l'invention apparaîtront de la description d'un mode de réalisation préféré, mais non exclusif, de la prothèse de hanche conforme à l'invention, illustrée à titre indicatif, mais non limitatif, par le dessin joint dans lequel : la figure 1, est une vue schématique illustrant l'introduction d'un composant fémoral de type connu dans un fémur avec canal évasé à sa partie supérieure ; la figure 2, illustre l'introduction d'un composant fémoral selon la présente invention dans un fémur à canal évasé à sa partie supérieure ; la figure 3, illustre la mise en place de la prothèse de hanche conforme à l'invention.  Other characteristics and advantages of the invention will appear from the description of a preferred, but not exclusive, embodiment of the hip prosthesis according to the invention, illustrated by way of indication, but not limitation, by the attached drawing. in which: FIG. 1 is a schematic view illustrating the introduction of a femoral component of known type into a femur with flared channel at its upper part; FIG. 2 illustrates the introduction of a femoral component according to the present invention into a femur with a flared channel at its upper part; Figure 3 illustrates the installation of the hip prosthesis according to the invention.

Comme le montrent les figures citées ci-dessus, et tout d'abord la figure 1, qui représente l'introduction d'un composant fémoral comportant une tige 1 dans le canal d'un fémur qui présente une conformation évasée à sa partie supérieure, on constate que l'introduction du composant fémoral, dans le canal 2 du fémur 3 aboutit, en raison de l'évasement du canal, à ce que la tige 1 se place principalement en profondeur dans le canal, l'inconvénient étant que l'axe 5 de l'emplacement 4 du logement du col amovible est désaxé par rapport au centre de rotation optimal 6 de la tête du fémur.  As shown in the figures cited above, and first of all in FIG. 1, which represents the introduction of a femoral component comprising a rod 1 into the channel of a femur which has a flared conformation at its upper part, it can be seen that the introduction of the femoral component into the canal 2 of the femur 3 results, due to the widening of the canal, in that the rod 1 is placed mainly deep in the canal, the drawback being that the axis 5 of location 4 of the removable neck housing is offset from the optimal center of rotation 6 of the head of the femur.

Le désaxage, indiqué par la référence d, implique que le fémur ne s'articule pas de manière optimale avec le bassin.  The offset, indicated by the reference d, implies that the femur does not articulate optimally with the pelvis.

La figure 2, dans laquelle les mêmes chiffres de références que ceux de la figure 1 désignent les mêmes éléments, représente un composant fémoral comportant une tige 1 dans lequel l'emplacement 4 du logement du col amovible, indiqué sur la figure 4 par le chiffre de référence 10, est réalisé au niveau de l'extrémité proximale de la tige 1, de manière analogue à ce que représente la figure 1, avec comme particularité que cet emplacement est défini de manière telle que son axe, désigné par le chiffre de  Figure 2, in which the same reference numerals as those in Figure 1 denote the same elements, shows a femoral component comprising a rod 1 in which the location 4 of the removable neck housing, indicated in Figure 4 by the number 10, is produced at the level of the proximal end of the rod 1, in a manner analogous to that shown in FIG. 1, with the particularity that this location is defined in such a way that its axis, designated by the number of

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référence 5, et décalé vers la zone latérale de manière à compenser le désaxage"d"qui apparaît si le canal 2 du fémur est de conformation évasée à sa partie supérieure.  reference 5, and offset towards the lateral zone so as to compensate for the offset "d" which appears if the channel 2 of the femur is of flared conformation at its upper part.

La réalisation de l'emplacement 4, sensiblement décalé latéralement par rapport au centre de la tête de la tige 1, est donc telle que l'axe 5 de cet emplacement passe par le centre de rotation 6 de la tête du fémur.  The embodiment of the location 4, substantially offset laterally relative to the center of the head of the rod 1, is therefore such that the axis 5 of this location passes through the center of rotation 6 of the head of the femur.

La figure 3 représente une cavité cotyloïde 12 pouvant être accouplée avec la tige 1, après interposition du col amovible 10 et d'un élément hémisphérique 13 destiné à éviter le frottement de la tête 14 du col amovible 10 dans la cavité cotyloïde 12.  FIG. 3 represents an acetabular cavity 12 which can be coupled with the rod 1, after interposition of the removable neck 10 and of a hemispherical element 13 intended to avoid friction of the head 14 of the removable neck 10 in the acetabular cavity 12.

On a constaté en pratique que la prothèse de hanche conforme à l'invention atteint parfaitement le but prévu, puisqu'elle permet de réaliser une articulation optimale entre le fémur et le bassin, indépendamment de la conformation évasée du canal du fémur dans lequel est introduit le composant fémoral destiné à être accouplé avec la cavité cotyloïde correspondante, après interposition du col amovible.  It has been found in practice that the hip prosthesis according to the invention perfectly achieves the intended purpose, since it makes it possible to achieve an optimal joint between the femur and the pelvis, independently of the flared conformation of the femur canal into which is introduced the femoral component intended to be coupled with the corresponding acetabular cavity, after interposition of the removable neck.

De cette façon, le désaxage normalement présent entre l'axe de l'emplacement du logement du col amovible existant dans le composant fémoral et le centre de rotation idéal de la tête du fémur n'est plus présent, grâce au décalage latéral de l'emplacement du logement du col amovible.  In this way, the offset normally present between the axis of the location of the housing of the removable neck existing in the femoral component and the ideal center of rotation of the head of the femur is no longer present, thanks to the lateral offset of the location of the removable collar housing.

Ce décalage se produit en direction du désaxage que l'on veut annuler.  This offset occurs in the direction of the offset that we want to cancel.

La prothèse de hanche ainsi conçue est susceptible de nombreuses modifications et variantes, qui rentrent toutes dans le concept de l'invention ; de plus, tous les détails peuvent être remplacés par d'autres éléments techniquement équivalents.  The hip prosthesis thus designed is susceptible to numerous modifications and variants, all of which fall within the concept of the invention; furthermore, all details may be replaced by other technically equivalent elements.

En pratique, les matières employées, tout en étant compatibles avec l'utilisation spécifique, ainsi que les dimensions peuvent être quelconques en fonction des exigences et de l'état de la technique. In practice, the materials used, while being compatible with the specific use, as well as the dimensions can be any according to the requirements and the state of the art.

Claims (2)

REVENDICATIONS 1. Prothèse de hanche avec composant fémoral et cavité cotyloïde associée, ce composant fémoral comportant, au niveau de sa tête, un emplacement pour loger un col amovible permettant l'accouplement avec la cavité cotyloïde, caractérisée en ce que ledit emplacement (4) est réalisé de manière que son axe (5) passe par le centre de rotation anatomique (6), cet emplacement étant décalé par rapport au bord médian de la tige (1) du composant fémoral.  1. Hip prosthesis with femoral component and associated acetabular cavity, this femoral component comprising, at the level of its head, a location for housing a removable neck allowing coupling with the acetabular cavity, characterized in that said location (4) is made so that its axis (5) passes through the anatomical center of rotation (6), this location being offset from the median edge of the stem (1) of the femoral component. 2. Composant fémoral pour introduction dans le canal fémoral, comprenant une tige (1) destinée à être introduite dans le canal fémoral et ayant une extrémité proximale comportant un emplacement pour le logement d'un col amovible (10) pouvant être accouplé avec une cavité cotyloïde (12) qui, pour sa part, est logée dans l'os du bassin du patient, caractérisé en ce que ledit emplacement (4) est réalisé de manière que son axe (5) passe par le centre de rotation anatomique (6), cet emplacement étant décalé par rapport au bord médian de la tige (1). 2. Femoral component for introduction into the femoral canal, comprising a rod (1) intended to be introduced into the femoral canal and having a proximal end comprising a location for housing a removable neck (10) which can be coupled with a cavity acetabulum (12) which, for its part, is housed in the bone of the patient's pelvis, characterized in that said location (4) is made so that its axis (5) passes through the center of anatomical rotation (6) , this location being offset from the median edge of the rod (1).
FR0101492A 2000-12-13 2001-02-05 HIP PROSTHESIS WITH FEMALE COMPONENT AND ASSOCIATED COTYLOID CAVITY, FOR CEMENT-FREE PLACEMENT Expired - Fee Related FR2817733B1 (en)

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Application Number Priority Date Filing Date Title
NL1016865A NL1016865C2 (en) 2000-12-13 2000-12-13 Hip prosthesis with thigh component and associated cup-shaped cavity, for placement without kit.

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FR2817733A1 true FR2817733A1 (en) 2002-06-14
FR2817733B1 FR2817733B1 (en) 2004-10-22

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FR0101492A Expired - Fee Related FR2817733B1 (en) 2000-12-13 2001-02-05 HIP PROSTHESIS WITH FEMALE COMPONENT AND ASSOCIATED COTYLOID CAVITY, FOR CEMENT-FREE PLACEMENT

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FR (1) FR2817733B1 (en)
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647669A1 (en) * 1989-05-30 1990-12-07 Vialla Jean Marie Anatomical hip prosthesis
FR2721200A1 (en) * 1994-06-17 1995-12-22 Cremascoli France Hip prosthesis with variable articulation
WO2000064384A1 (en) * 1999-04-27 2000-11-02 Steinicke Maschinen- Und Werkzeugbau Ag Endoprosthesis, especially for an artificial hip joint

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2647669A1 (en) * 1989-05-30 1990-12-07 Vialla Jean Marie Anatomical hip prosthesis
FR2721200A1 (en) * 1994-06-17 1995-12-22 Cremascoli France Hip prosthesis with variable articulation
WO2000064384A1 (en) * 1999-04-27 2000-11-02 Steinicke Maschinen- Und Werkzeugbau Ag Endoprosthesis, especially for an artificial hip joint

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NL1016865C2 (en) 2002-11-12
FR2817733B1 (en) 2004-10-22
NL1016865A1 (en) 2002-06-14

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