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FR2624371A1 - Fastening block for a prosthetic patella - Google Patents

Fastening block for a prosthetic patella Download PDF

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Publication number
FR2624371A1
FR2624371A1 FR8717293A FR8717293A FR2624371A1 FR 2624371 A1 FR2624371 A1 FR 2624371A1 FR 8717293 A FR8717293 A FR 8717293A FR 8717293 A FR8717293 A FR 8717293A FR 2624371 A1 FR2624371 A1 FR 2624371A1
Authority
FR
France
Prior art keywords
planes
medular
tail
tab
fixing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8717293A
Other languages
French (fr)
Other versions
FR2624371B3 (en
Inventor
Arnaud Largier
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BIOMECANIQUE INTEGREE
Original Assignee
BIOMECANIQUE INTEGREE
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Filing date
Publication date
Application filed by BIOMECANIQUE INTEGREE filed Critical BIOMECANIQUE INTEGREE
Priority to FR8717293A priority Critical patent/FR2624371B3/en
Publication of FR2624371A1 publication Critical patent/FR2624371A1/en
Application granted granted Critical
Publication of FR2624371B3 publication Critical patent/FR2624371B3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—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
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/367—Proximal or metaphyseal parts of shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A61F2002/30136—Rounded shapes, e.g. with rounded corners undulated or wavy, e.g. serpentine-shaped or zigzag-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30138—Convex polygonal shapes
    • A61F2002/30153—Convex polygonal shapes rectangular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—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
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30322—The prosthesis having different structural features at different locations within the same prosthesis differing in surface structures
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2002/4631—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor the prosthesis being specially adapted for being cemented
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004—Rounded shapes, e.g. with rounded corners
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0017—Angular shapes
    • A61F2230/0019—Angular shapes rectangular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0026—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in surface structures

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 present invention relates to fastening blocks for prosthetic patellas. The fastening block according to the invention essentially comprises a stem 4 and a fastening head 5, integral with one end 6 of the stem, the stem consisting of an oblong piece 10 delimited by two opposite faces 11, 12 situated in two substantially parallel planes 13, 14 separated by a distance less than the thickness of the medullary cavity 2 of the long bone 3 in which the block is intended to be fitted, the two opposite sides 15, 16 of the oblong piece 10 contained between the two planes 13, 14 being separated by a distance substantially equal to the thickness of the medullary cavity. Application: production of a prosthesis of the femoral type.

Description

PATTE DE FIXATION POUR UNE ROTULE DE PROTHESE
La présente invention concerne les pattes de fixation pour des rotules de prothèses du type fémoral, en l'occurrence la partie mâle de ces rotules.FIXING BRACKET FOR A PROSTHETIC BALL JOINT
The present invention relates to the fixing lugs for ball joints of prostheses of the femoral type, in this case the male part of these ball joints.

Il est déjà connu un certain nombre de réalisations de pattes de fixation pour soutenir la partie mâle d'une rotule de prothèse du type fémoral, c'est-à-dire de pattes destinées à être disposées par enfichage dans le canal médulaire d'un os long. Les réalisations actuelles de ces pattes comportent une queue terminée par une tête de fixation sur laquelle est généralement disposée, par un emboitement du type conique, une partie mâle d'une rotule comportant essentiellement une portion de sphère. Le problème qui se pose pour la fixation d'une telle patte dans un os long est la solidité et la durée de la fixation car il est bien évident que l'on ne peut pas intervenir souvent pour la consolider. It is already known a certain number of embodiments of fixing lugs for supporting the male part of a prosthetic ball joint of the femoral type, that is to say of legs intended to be arranged by plugging into the medular canal of a long bone. The current embodiments of these legs include a tail terminated by a fixing head on which is generally disposed, by a conical type socket, a male part of a ball joint essentially comprising a portion of a sphere. The problem which arises for the fixing of such a leg in a long bone is the solidity and the duration of the fixing because it is quite obvious that one cannot often intervene to consolidate it.

La présente invention a pour but de réaliser une patte de fixation pour une rotule de prothèse du type fémoral, dans le canal médulaire d'un os long, ayant une structure qui lui permet une coopération rigide avec l'os et une fixation fiable pendant un temps relativement long, mais aussi, en cas de besoin après une intervention chirurgicale, une dissociation d'avec l'os relativement aisée. The object of the present invention is to produce a fixing lug for a prosthetic kneecap of the femoral type, in the medular canal of a long bone, having a structure which allows it to rigid cooperation with the bone and reliable fixing during a relatively long time, but also, if necessary after surgery, a relatively easy dissociation from the bone.

Plus précisément, la présente invention a pour objet une patte de fixation pour une rotule de prothèse du type fémoral apte à être fixée dans le canal médulaire d'un os long, ladite patte comportant au moins une queue et une tête de fixation solidaire d'une extrémité de ladite queue, la tête de fixation étant apte à coopérer avec la partie mâle de la rotule, caractérisée par le fait que ladite queue est constituée par une pièce oblongue délimitée par deux faces opposées situées dans deux plans sensiblement parallèles, la distance séparant lea deux dits plans étant inférieure à 11 épaisseur dudit canal médulaire de l'os long dans lequel elle est destinée à être enfichée, les deux bords opposés de ladite pièce oblongue compris entre les deux dits plans étant séparés d'une distance sensiblement égale à l'épaisseur dudit canal médulaire. More specifically, the subject of the present invention is a fixing lug for a prosthetic ball joint of the femoral type capable of being fixed in the medular canal of a long bone, said lug comprising at least one tail and a fixing head secured to one end of said tail, the fixing head being able to cooperate with the male part of the ball joint, characterized in that said tail is constituted by an oblong piece delimited by two opposite faces situated in two substantially parallel planes, the distance separating the two said planes being less than the thickness of said medular canal of the long bone in which it is intended to be inserted, the two opposite edges of said oblong piece lying between the two said planes being separated by a distance substantially equal to l thickness of said medular canal.

D'autres caractéristiques et avantages de la présente invention apparaftront au cours de la description suivante donnée en regard des dessins annexés à titre illustratif mais nullement limitatif dans lesquels
La figure 1 représente, dans une vue légèrement en perspective cavalière, un mode de réalisation d'une patte selon l'invention et,
La figure 2 une vue en coupe de la patte selon la figure 1 et référencée II-II sur cette figure.Other characteristics and advantages of the present invention will become apparent during the following description given with reference to the drawings annexed by way of illustration but in no way limitative in which
FIG. 1 represents, in a slightly perspective view, an embodiment of a tab according to the invention and,
Figure 2 a sectional view of the tab according to Figure 1 and referenced II-II in this figure.

Les figures représentent une patte de fixation 1 pour une rotule de prothèse destinée à être enfichée dans le canal médulaire 2 d'un os du type long 3 représenté en traits interrompus, par exemple un fémur. Cette patte 1 comporte essentiellement deux parties, une première partie 4 constituant une queue apte à être enfichée dans le canal médulaire 2 et une seconde partie constituant une tête de fixation 5 solidaire d'une extrémité 6 de la queue 4, cette tête 5 étant destinée à coopérer avec la partie mâle 7 d'une rotule, par exemple une portion de sphère évoquée sur le dessin en traits interrompus. ta structure d'une telle tête 5 solidaire de l'extrémité 6 de la queue 4 étant connue en ellemême ne sera pas plus amplement décrite ici. The figures represent a fixing lug 1 for a prosthesis ball intended to be inserted in the medular canal 2 of a bone of the long type 3 represented in broken lines, for example a femur. This tab 1 essentially comprises two parts, a first part 4 constituting a tail able to be inserted into the medular channel 2 and a second part constituting a fixing head 5 secured to one end 6 of the tail 4, this head 5 being intended to cooperate with the male part 7 of a ball joint, for example a portion of a sphere mentioned in the drawing in broken lines. your structure of such a head 5 secured to the end 6 of the tail 4 being known in itself will not be described more fully here.

La queue 4 est essentiellement constituée par une pièce oblongue 10, par exemple en métal comme du titane, affectant sensiblement la forme d'un tronc pyramidal. The tail 4 is essentially constituted by an oblong piece 10, for example made of metal such as titanium, substantially affecting the shape of a pyramidal trunk.

Cependant, plus particulièrement, cette pièce oblongue 10 comporte deux faces opposées 11, 12 situées sensiblement dans deux plans 13, 14 sensiblement parallèles séparés d'une distance inférieure à l'épaisseur du canal médulaire 2. De plus, les deux autres côtés opposés 15, 16 de la pièce oblongue compris entre les deux plans 13, 14 ont des formes sensiblement convexes et sont distants l'un de l'autre d'une longueur sensiblement égale à l'épaisseur du canal médulaire 2. Dans un mode de réalisation avantageux, ces bords ont une convexité la plus proche possible de celle du canal médulaire afin que, lorsque la queue est enfichée dans ce canal, ces deux côtés 15, 16 viennent le plus possible au contact de la paroi du canal médulaire qui est en os compact, afin d'assurer un maintien latéral des plus rigides.  However, more particularly, this oblong part 10 has two opposite faces 11, 12 located substantially in two planes 13, 14 substantially parallel separated by a distance less than the thickness of the medular channel 2. In addition, the two other opposite sides 15 , 16 of the oblong part lying between the two planes 13, 14 have substantially convex shapes and are spaced from each other by a length substantially equal to the thickness of the medular channel 2. In an advantageous embodiment , these edges have a convexity as close as possible to that of the medular canal so that, when the tail is plugged into this canal, these two sides 15, 16 come as close as possible to the wall of the medular canal which is made of compact bone , to ensure the most rigid lateral support.

De plus, les deux faces 11, 12 situées dans les deux plans parallèles 13, 14 comportent des ondulations 17 orientées de telle façon que leur sommet soit sensiblement parallèle à l'axe longitudinal 18 de la pièce oblongue 10. Ces ondulations présentent l'avantage d'augmenter la surface de contact avec un élément de fixation, par exemple de la colle du type ciment 19, qui sera coulé dans le canal médulaire essentiellement de part et d'autre de cette pièce pour combler ce canal et ainsi parfaitement solidariser la queue 4 avec l'os 3, comme cela parait clairement illustré sur la figure 2. In addition, the two faces 11, 12 located in the two parallel planes 13, 14 have corrugations 17 oriented so that their apex is substantially parallel to the longitudinal axis 18 of the oblong part 10. These corrugations have the advantage to increase the contact surface with a fixing element, for example cement type glue 19, which will be poured into the medular channel essentially on either side of this part to fill this channel and thus perfectly secure the tail 4 with bone 3, as this appears clearly illustrated in FIG. 2.

Une telle patte de fixation présente essentiellement deux avantages. Les deux côtés 15, 16 ayant une forme convexe et étant séparés d'une distance parfaitement adaptée à l'épaisseur du canal médulaire, la queue peut s'associer plus directement avec l'os compact et donc résister aux efforts auxquels elle peut être soumise quand elle est implantée, par exemple, dans le fémur d'un patient. Par ailleurs, les deux faces opposées 11, 12 distantes d'une valeur nettement inférieure à l'épaisseur du canal médulaire permettent de pouvoir couler de part et d'autre de la queue 4 le ciment 19 et l'orientation des ondulations 17 sensiblement parallèle à l'axe longitudinal 18 de la pièce oblongue permet de sortir la patte, si cela s' avère nécessaire, en exerçant une traction relativement faible, ces ondulations jouant même le rôle de guide dans cette extraction.  Such a mounting lug essentially has two advantages. The two sides 15, 16 having a convex shape and being separated by a distance perfectly suited to the thickness of the medular canal, the tail can associate more directly with the compact bone and therefore resist the forces to which it may be subjected. when it is implanted, for example, in a patient's femur. Furthermore, the two opposite faces 11, 12 distant by a value significantly less than the thickness of the medular channel make it possible to be able to flow on either side of the tail 4 the cement 19 and the orientation of the corrugations 17 substantially parallel at the longitudinal axis 18 of the oblong part allows the tab to come out, if this proves necessary, by exerting a relatively weak traction, these undulations even playing the role of guide in this extraction.

Claims (7)

REVENDICATIONS 1. Patte de fixation (1) pour une rotule de prothèse du type fémoral apte à être fixée dans le canal médulaire (2) d'un os long (3), ladite patte comportant au moins une queue (4) et une tête de fixation (5) solidaire d'une extrémité (6) de ladite queue, la tête de fixation (5) étant apte à coopérer avec la partie mâle (7) d'une rotule, caractérisée par le fait que ladite queue (4) est constituée par une pièce oblongue (10) délimitée par deux faces (11, 12) opposées situées dans deux plans (13, 14) sensiblement parallèles, la distance séparant les deux dits plans (13, 14) étant inférieure à l'épaisseur dudit canal médulaire (2) de l'os long (3) dans lequel la patte est destinée à être enfichée, les deux c8tés (15, 16) opposés de ladite pièce oblongue (10) compris entre lEs deux dits plans (13, 14) étant séparés d'une distance sensiblement égale à l'épaisseur dudit canal médulaire (2). 1. Fixing tab (1) for a prosthetic ball of the femoral type able to be fixed in the medular canal (2) of a long bone (3), said tab comprising at least one tail (4) and one head. fixing (5) integral with one end (6) of said tail, the fixing head (5) being able to cooperate with the male part (7) of a ball joint, characterized in that said tail (4) is constituted by an oblong piece (10) delimited by two opposite faces (11, 12) located in two planes (13, 14) substantially parallel, the distance separating the two said planes (13, 14) being less than the thickness of said channel medular (2) of the long bone (3) in which the tab is intended to be inserted, the two opposite sides (15, 16) of said oblong piece (10) lying between the two said planes (13, 14) being separated by a distance substantially equal to the thickness of said medular channel (2). 2. Patte selon la revendication 1, caractérisée par le fait que les deux dites faces opposées (11, 12) définies dans les deux dits plans (13, 14) parallèles comportent des ondulations (17) pour augmenter la surface de contact avec du ciment (19) apte à être coulé dans le canal médulaire (2). 2. Leg according to claim 1, characterized in that the two said opposite faces (11, 12) defined in the two said planes (13, 14) parallel include corrugations (17) to increase the contact surface with cement (19) able to be poured into the medular canal (2). 3. Patte selon la revendication 2, caractérisée par le fait que lesdites ondulations (17) ont des directions sensiblement parallèles. 3. Leg according to claim 2, characterized in that said undulations (17) have substantially parallel directions. 4. Patte selon la revendication 3, caractérisée par le fait que la direction desdites ondulations (17) est sensiblement parallèle è l'axe longitudinal (18) de ladite pièce oblongue (10). 4. Leg according to claim 3, characterized in that the direction of said corrugations (17) is substantially parallel to the longitudinal axis (18) of said oblong piece (10). 5. Patte selon l'une des revendications précédentes, caractérisée par le fait que les deux dits côtés (15, 16) opposés compris entre les deux dits plans (13, 14) ont des surfaces convexes. 5. Leg according to one of the preceding claims, characterized in that the two said opposite sides (15, 16) lying between the two said planes (13, 14) have convex surfaces. 6. Patte selon la revendication 5, caractérisée par le fait que la convexité des deux dites surfaces est sensiblement identique à la convexité de la surface du canal médulaire (2). 6. Tab according to claim 5, characterized in that the convexity of the two said surfaces is substantially identical to the convexity of the surface of the medular canal (2). 7. Patte selon la revendication 6, caractérisée par le fait que ladite pièce oblongue (10) est en titane.  7. Leg according to claim 6, characterized in that said oblong part (10) is made of titanium.
FR8717293A 1987-12-11 1987-12-11 FIXING BRACKET FOR A PROSTHETIC BALL JOINT Expired - Lifetime FR2624371B3 (en)

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Application Number Priority Date Filing Date Title
FR8717293A FR2624371B3 (en) 1987-12-11 1987-12-11 FIXING BRACKET FOR A PROSTHETIC BALL JOINT

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FR8717293A FR2624371B3 (en) 1987-12-11 1987-12-11 FIXING BRACKET FOR A PROSTHETIC BALL JOINT

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FR2624371B3 FR2624371B3 (en) 1990-03-16

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2667785A1 (en) * 1990-10-16 1992-04-17 Procom Femoral element for hip prosthesis
FR2680315A1 (en) * 1991-08-12 1993-02-19 Implants Instr Ch Fab Femoral stem for hip joint
FR2699398A1 (en) * 1992-12-21 1994-06-24 Seguier Bernard Femoral prosthesis with grooved proximal section and tapering neck
DE4421154B4 (en) * 1994-06-10 2005-01-05 Biomet Merck Deutschland Gmbh stem prosthesis

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2667785A1 (en) * 1990-10-16 1992-04-17 Procom Femoral element for hip prosthesis
FR2680315A1 (en) * 1991-08-12 1993-02-19 Implants Instr Ch Fab Femoral stem for hip joint
FR2699398A1 (en) * 1992-12-21 1994-06-24 Seguier Bernard Femoral prosthesis with grooved proximal section and tapering neck
DE4421154B4 (en) * 1994-06-10 2005-01-05 Biomet Merck Deutschland Gmbh stem prosthesis

Also Published As

Publication number Publication date
FR2624371B3 (en) 1990-03-16

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