FR2645012A1 - Femoral element for a total hip prosthesis - Google Patents

Femoral element for a total hip prosthesis Download PDF

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Publication number
FR2645012A1
FR2645012A1 FR8904378A FR8904378A FR2645012A1 FR 2645012 A1 FR2645012 A1 FR 2645012A1 FR 8904378 A FR8904378 A FR 8904378A FR 8904378 A FR8904378 A FR 8904378A FR 2645012 A1 FR2645012 A1 FR 2645012A1
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France
Prior art keywords
femur
neck
femoral
prosthetic
intended
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Granted
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FR8904378A
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French (fr)
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FR2645012B1 (en
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GINDREY JACQUES
NEDERVELDE THIERRY VAN
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GINDREY JACQUES
NEDERVELDE THIERRY VAN
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Priority to FR8904378A priority Critical patent/FR2645012B1/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
    • 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
    • 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
    • A61F2002/3625—Necks
    • A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
    • 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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2002/3678—Geometrical features
    • A61F2002/3686—Geometrical features bent

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

This femoral element is of the type comprising a femoral shaft 2 intended to be engaged and fixed in the medullary canal of the femur 3 after resection of its upper end, and having, at its upper end, a base 4 intended to rest on the resectioned end of the femur 3 and to support, in a movable or immovable manner, and by way of a projection 5 forming a prosthetic neck and replacing the neck of the femur 3, a spherical head 6 intended to replace the head of the femur and to be engaged in a prosthetic cup 7 fixed, in any appropriate manner, in the acetabular cavity of the patient, the longitudinal axis 9 of the projection 5 forming, with that 11 of the femoral shaft, an angle 12 substantially identical to that formed by the axis of the neck of the femur 3 with that of the femur 3. The prosthetic neck 5 is arranged in such a way that its longitudinal axis 9 is not contained within the plane 13 which contains that 11 of the femoral shaft 2, but is offset angularly forwards of this plane 13 in order to form with it an angle 16 of 10 to 20 DEG and in this way to create an anteversion of the prosthetic neck 5.

Description

"Elément fémoral pour prothèse totale de la hanche"
La présente invention concerne un élément fémoral pour prothèse totale de la hanche."Femoral component for total hip prosthesis"
The present invention relates to a femoral element for total hip prosthesis.

La plupart des éléments fémoraux actuellement utilisés pour des prothèses totales de la hanche comporte une tige fémorale destinée à être engagée et fixée dans le canal médullaire du fémur après résection de son extrémité supérieure et présentant, à son extrémité supérieure, une embase destinée à reposer sur l'extrémité réséquée du fémur et à supporter, de manière amovible ou non et par l'intermédiaire d'une saillie formant col prothétique en remplacement du col du fémur, une tête sphérique destinée à remplacer la tête du fémur et à être engagée dans une cupule prothétique fixée, de toute manière appropriée, dans la cavité cotyloîdienne du patient. Most of the femoral elements currently used for total hip prostheses include a femoral rod intended to be engaged and fixed in the medullary canal of the femur after resection of its upper end and having, at its upper end, a base intended to rest on the resected end of the femur and to support, removably or not, and by means of a projection forming prosthetic neck in replacement of the neck of the femur, a spherical head intended to replace the head of the femur and to be engaged in a prosthetic cup fixed in any suitable manner in the patient's acetabular cavity.

Dans ces éléments fémoraux connus, la saillie formant col prothétique, dont l'axe longitudinal forme, avec celui de la tige fémorale, un angle sensiblement identique à celui que formait l'axe du col du fémur avec celui du fémur, est disposée de manière à ce que son axe longitudinal soit situé dans le même plan que celui de la tige fémorale. In these known femoral elements, the projection forming a prosthetic neck, the longitudinal axis of which forms, with that of the femoral stem, an angle substantially identical to that formed by the axis of the neck of the femur with that of the femur, is arranged so that its longitudinal axis is located in the same plane as that of the femoral stem.

Bien que, d'une manière générale, ce type de prothèse donne toute satisfaction, on a constaté que certains mouvements des patients qui en sont équipés, tels qu'une rotation de la jambe, provoquent des chocs du massif des épines du fémur avec l'os iliaque, ce qui est parfois douloureux et risque de provoquer le descellement de la cupule. Although, in general, this type of prosthesis is entirely satisfactory, it has been found that certain movements of patients who are equipped with it, such as a rotation of the leg, cause shocks to the mass of thorns of the femur with the iliac bone, which is sometimes painful and may cause the cup to loosen.

La présente invention vise à éliminer ces inconvénients. A cet effet, dans la prothèse qu'elle concerne et qui est du type précité, le col prothétique est disposé de manière à ce que son axe longitudinal ne soit pas contenu dans le plan qui contient celui de la tige fémorale mais soit décalé angulairement en avant de ce plan pour former avec lui un angle de 10 à 20' et créer ainsi une antéversion du col prothétique qui a pour effet de déporter, à l'extérieur et vers l'avant, la partie supérieure du fémur et d'éviter de ce fait les chocs précités. The present invention aims to eliminate these drawbacks. To this end, in the prosthesis to which it relates and which is of the aforementioned type, the prosthetic neck is arranged so that its longitudinal axis is not contained in the plane which contains that of the femoral stem but is angularly offset in before this plane to form with it an angle of 10 to 20 'and thus create an anteversion of the prosthetic neck which has the effect of moving, outside and forward, the upper part of the femur and avoiding this makes the aforementioned shocks.

En outre, cette antéversion provoque non seulement une latéralisation du fémur mais aussi une augmentation de la tension des muscles fessiers propre à diminuer les risques de luxation. Cette antéversion, par le déport à l'extérieur, présente encore l'avantage de rétablir le varus du fémur. In addition, this anteversion causes not only lateralization of the femur but also an increase in the tension of the gluteal muscles which reduces the risk of dislocation. This anteversion, by the offset to the outside, still has the advantage of restoring the varus of the femur.

De préférence, l'angle précité que forme l'axe longitudinal du col prothétique avec le plan qui contient celui de la tige fémorale est de 15ç.  Preferably, the aforementioned angle formed by the longitudinal axis of the prosthetic neck with the plane which contains that of the femoral stem is 15c.

Suivant une autre caractéristique intéressante de l'invention, améliorant son contact intime avec la diaphyse du fémur, l'extrémité distale de la tige fémorale est incurvée dans la direction opposée au décalage angulaire du col prothétique c'est-à-dire en direction de l'arrière. According to another advantageous characteristic of the invention, improving its intimate contact with the diaphysis of the femur, the distal end of the femoral stem is curved in the direction opposite to the angular offset of the prosthetic neck, that is to say in the direction of the back.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemple non limitatif, une forme d'exécution de cet élément fémoral pour une prothèse totale de la hanche destiné à un fémur gauche
Figure I en est une vue de face en élévation ;
Figure 2 en est une vue de côté en élévation ;
Figure 3 en est une vue en plan par dessus;
Figure 4 est une vue de face en élévation, avec coupes partielles, de l'extrémité inférieure d'un corps humain dont la jambe gauche est équipée de l'élément fémoral selon l'invention et dont la jambe droite est équipée d'un élément fémoral d'un type classique ;;
Figure 5 est une vue en coupe suivant V-V de figure 4, illustrant l'inconvénient des éléments fémoraux d'un type connu
Figure 6 est une vue en coupe suivant VI-VI de figure 4, illustrant l'avantage de l'élément fémoral selon l'invention.In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended diagrammatic drawing representing, by way of nonlimiting example, an embodiment of this femoral element for a total prosthesis of the hip intended for a left femur
Figure I is a front view in elevation;
Figure 2 is a side view in elevation;
Figure 3 is a plan view from above;
Figure 4 is a front elevation view, with partial sections, of the lower end of a human body whose left leg is equipped with the femoral element according to the invention and whose right leg is equipped with an element femoral of a conventional type;
Figure 5 is a sectional view along VV of Figure 4, illustrating the disadvantage of femoral elements of a known type
Figure 6 is a sectional view along VI-VI of Figure 4, illustrating the advantage of the femoral element according to the invention.

Comme le montrent les figures 1 à 3, l'élément fémoral selon l'invention est du type comportant une tige fémorale 2 destinée à être engagée et fixée dans le canal médullaire d'un fémur 3 après résection de son extrémité supérieure. A son extrémité supérieure, cette tige fémorale 2 présente une embase 4 destinée à reposer sur l'extrémité réséquée du fémur 3. Cette embase 4 porte, sur sa face supérieure libre, une saillie ou col prothétique 5 destinée à supporter une tête sphérique 6 qui est elle-même destinée à remplacer la tête du fémur 3 réséqué et, par conséquent, à être engagée dans la cavité sphérique 7a d'une cupule 7 scellée dans la cavité cotyloldienne 8 du patient. As shown in Figures 1 to 3, the femoral element according to the invention is of the type comprising a femoral rod 2 intended to be engaged and fixed in the medullary canal of a femur 3 after resection of its upper end. At its upper end, this femoral stem 2 has a base 4 intended to rest on the resected end of the femur 3. This base 4 carries, on its free upper face, a projection or prosthetic neck 5 intended to support a spherical head 6 which is itself intended to replace the head of the resected femur 3 and, consequently, to be engaged in the spherical cavity 7a of a cup 7 sealed in the acetabular cavity 8 of the patient.

Dans l'exemple illustré sur le dessin, la tête sphérique est fixée au col prothétique 5 par emmanchement et coincement et, à cet effet, le col prothétique se termine par un tronçon tronconique Sa formant cône morse, tandis que la tête sphérique 6 présente un alésage tronconique 6a de forme complémentaire apte à être engagé jusqu'à son coincement sur le cône morse
Sa du col prothétique 5.In the example illustrated in the drawing, the spherical head is fixed to the prosthetic neck 5 by fitting and wedging and, for this purpose, the prosthetic neck ends in a frustoconical section Sa forming a morse cone, while the spherical head 6 has a tapered bore 6a of complementary shape capable of being engaged until it is wedged on the walrus cone
Sa of the prosthetic neck 5.

Comme le montre plus particulièrement la figure 1, l'axe longitudinal 9 du col prothétique 5 forme, avec l'axe longitudinal 11 de la tige fémorale 2, un angle 12 correspondant sensiblement à l'angle que formait l'axe du col du fémur 3 avec l'axe longitudinal de ce fémur 3 avant résection. As shown more particularly in FIG. 1, the longitudinal axis 9 of the prosthetic neck 5 forms, with the longitudinal axis 11 of the femoral stem 2, an angle 12 corresponding substantially to the angle formed by the axis of the neck of the femur 3 with the longitudinal axis of this femur 3 before resection.

Comme le montre plus particulièrement la figure 5, dans les éléments fémoraux d'un type classique, l'axe longitudinal 9 du col pro#hé- tique 5 est situé dans le même plan 13 que l'axe longitudinal 11 de la tige fémorale 2. As shown more particularly in FIG. 5, in the femoral elements of a conventional type, the longitudinal axis 9 of the pro #hetic neck 5 is located in the same plane 13 as the longitudinal axis 11 of the femoral stem 2 .

Comme le montre cette figure 5, il résulte de cette disposition que l'os iliaque 14 se trouve sur la trajectoire du massif des épines 15 du fémur 3 et qu'une rotation de ce dernier peut engendrer des chocs du massif des épines 15 contre l'os iliaque 14, ce qui non seulement peut engendrer des douleurs mais risque de provoquer le descellement de la cupule 7. As shown in this FIG. 5, it follows from this arrangement that the iliac bone 14 is on the trajectory of the massif of thorns 15 of the femur 3 and that a rotation of the latter can generate shocks of the massif of thorns 15 against the iliac bone 14, which not only can cause pain but may cause the cup 7 to loosen.

Selon l'invention et comme le montrent plus particulièrement les figures 2, 3 et 6, le col prothétique 5 est disposé sur l'embase 4 de manière que son axe longitudinal 9 soit décalé angulairement vers l'avant afin de former, avec le plan 13 qui contient l'axe longitudinal Il de la tige fémorale 2, un angle 16 de l'ordre de 150.  According to the invention and as shown more particularly in Figures 2, 3 and 6, the prosthetic neck 5 is disposed on the base 4 so that its longitudinal axis 9 is angularly offset forward to form, with the plane 13 which contains the longitudinal axis II of the femoral stem 2, an angle 16 of the order of 150.

Cet angle appelé antéversion a pour effet de décaler, vers l'extérieur et vers l'avant, l'extrémité supérieure du fémur réséqué 3. This angle called anteversion has the effect of shifting, outwards and forwards, the upper end of the resected femur 3.

Comme le montre plus particulièrement la figure 6 comparativement à la figure 5, cette antéversion a pour effet de modifier la trajectoire du massif des épines 15 du fémur 3 de telle sorte qu'elle échappe pratiquement à l'os iliaque 14. As shown more particularly in FIG. 6 compared with FIG. 5, this anteversion has the effect of modifying the trajectory of the mass of thorns 15 of the femur 3 so that it practically escapes the iliac bone 14.

En outre, comme le montre plus particulièrement la figure 4, le décalage, vers l'extérieur, de l'extrémité supérieure réséquée du fémur 3 a pour effet, non seulement, d'augmenter la tension du muscle fessier 17, mais également, de rétablir le varus du fémur 3. In addition, as shown more particularly in FIG. 4, the offset, towards the outside, of the resected upper end of the femur 3 has the effect, not only of increasing the tension of the gluteus muscle 17, but also, of restore the varus of the femur 3.

Cet élément fémoral présente donc, grâce à son antéversion, l'avantage de diminuer non seulement les risques de descellement de la cupule 7 mais aussi les risques de luxation. This femoral element therefore has, thanks to its anteversion, the advantage of reducing not only the risks of loosening of the cup 7 but also the risks of dislocation.

Comme cela ressort plus particulièrement dans l'examen de la figure 2, l'extrémité distale 2a de la tige fémorale 2 est incurvée en direction de l'arrière, c'est -à-dire dans la direction opposée au décalage angulaire 16 du col prothétique 5. Cette incurvation de la tige fémorale 2 lui permet de suivre parfaitement le canal médulaire du fémur et par conséquent améliore son contact intime avec la diaphyse de cet os.  As can be seen more particularly in the examination of FIG. 2, the distal end 2a of the femoral stem 2 is curved in the direction of the rear, that is to say in the direction opposite to the angular offset 16 of the neck prosthetic 5. This curvature of the femoral stem 2 allows it to perfectly follow the medular canal of the femur and consequently improves its intimate contact with the diaphysis of this bone.

Claims (3)

- REVENDICATIONS- CLAIMS 1.- Elément fémoral pour prothèse totale de la hanche, du type comportant une tige fémorale (2) destinée à être engagée et fixée dans le canal médullaire du fémur (3) après résection de son extrémité supérieure et présentant, à son extrémité supérieure, une embase (4) destinée à reposer sur l'extrémité réséquée du fémur (3) et à supporter, de manière amovible ou non et par l'intermédiaire d'une saillie (5) formant col prothétique en remplacement du col du fémur (3), une tête sphérique (6) destinée à remplacer la tête du fémur et à être engagée dans une cupule prothétique (7) fixée, de toute manière appropriée, dans la cavité cotyloîdienne du patient, l'axe longitudinal (9) de la saillie t5) formant, avec celui (11) de la tige fémorale (2), un angle (12) sensiblement identique å- celui que formait l'axe du col du fémur (3) avec celui du fémur (3), caractérisé en ce que le col prothétique (5) est disposé de manière à ce que son axe longitudinal (9) ne soit pas contenu dans le plan (13) qui contient celui 811) de la tige fémorale (2) mais soit décalé angulairement en avant de ce plan (13) pour former avec lui un angle (16) de 15 à 20 et créer ainsi une antéversion du col prothétique (5). 1.- Femoral element for total hip prosthesis, of the type comprising a femoral stem (2) intended to be engaged and fixed in the medullary canal of the femur (3) after resection of its upper end and having, at its upper end, a base (4) intended to rest on the resected end of the femur (3) and to support, removably or not, and by means of a projection (5) forming prosthetic neck replacing the neck of the femur (3 ), a spherical head (6) intended to replace the head of the femur and to be engaged in a prosthetic cup (7) fixed, in any suitable manner, in the cotyloid cavity of the patient, the longitudinal axis (9) of the projection t5) forming, with that (11) of the femoral stem (2), an angle (12) substantially identical å- that formed by the axis of the neck of the femur (3) with that of the femur (3), characterized in that that the prosthetic neck (5) is arranged so that its longitudinal x (9) is not contained in the plane (13) which contains that 811) of the femoral stem (2) but is angularly offset in front of this plane (13) to form with it an angle (16) of 15 at 20 and thus create an anteversion of the prosthetic neck (5). 2.- Elément fémoral selon la revendication 1, caractérisé en ce que l'angle (16) que forme l'axe longitudinal (9) du col prothétique f5) avec le plan qui contient celui (li) de la tige fémorale (2) est de 150.  2.- femoral element according to claim 1, characterized in that the angle (16) that forms the longitudinal axis (9) of the prosthetic neck f5) with the plane which contains that (li) of the femoral stem (2) is 150. 3.- Elément fémoral selon la renvidication 1 ou renvendication 2, caractérisé en ce que l'extrémité distale {2a) de la tige fémorale (2), est incurvée en direction de l'arrière c'est-à-dire dans la direction opposée à celle du décalage angulaire (16) du col prothétique (5).  3.- Femoral element according to rewind 1 or rewind 2, characterized in that the distal end {2a) of the femoral stem (2), is curved in the rearward direction, that is to say in the direction opposite to that of the angular offset (16) of the prosthetic neck (5).
FR8904378A 1989-03-29 1989-03-29 FEMALE ELEMENT FOR TOTAL HIP PROSTHESIS Expired - Fee Related FR2645012B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2678162A1 (en) * 1991-06-25 1992-12-31 Arcos Orthopedie Femoral component of a hip prosthesis, which is to be cemented
WO2007109601A2 (en) * 2006-03-20 2007-09-27 Zimmer Technology, Inc. Prosthetic hip implants
WO2023220784A1 (en) * 2022-05-20 2023-11-23 David Kirwan A femoral prosthetic component

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3247726A1 (en) * 1982-12-23 1984-06-28 Orthoplant Vertriebs-GmbH, 2800 Bremen Total endoprosthesis for a hip joint
EP0222236A1 (en) * 1985-11-14 1987-05-20 GebràœDer Sulzer Aktiengesellschaft Rod for a femural-head prosthesis
USRE32488E (en) * 1982-09-28 1987-09-01 Hip prosthesis

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE32488E (en) * 1982-09-28 1987-09-01 Hip prosthesis
DE3247726A1 (en) * 1982-12-23 1984-06-28 Orthoplant Vertriebs-GmbH, 2800 Bremen Total endoprosthesis for a hip joint
EP0222236A1 (en) * 1985-11-14 1987-05-20 GebràœDer Sulzer Aktiengesellschaft Rod for a femural-head prosthesis

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2678162A1 (en) * 1991-06-25 1992-12-31 Arcos Orthopedie Femoral component of a hip prosthesis, which is to be cemented
WO2007109601A2 (en) * 2006-03-20 2007-09-27 Zimmer Technology, Inc. Prosthetic hip implants
WO2007109601A3 (en) * 2006-03-20 2009-06-25 Zimmer Tech Inc Prosthetic hip implants
US8088169B2 (en) 2006-03-20 2012-01-03 Dorr Lawrence D Prosthetic hip implants
WO2023220784A1 (en) * 2022-05-20 2023-11-23 David Kirwan A femoral prosthetic component

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