FR2610824A1 - Improved femoral rod for hip prostheses which is implanted without a sealing cement - Google Patents

Improved femoral rod for hip prostheses which is implanted without a sealing cement Download PDF

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Publication number
FR2610824A1
FR2610824A1 FR8702174A FR8702174A FR2610824A1 FR 2610824 A1 FR2610824 A1 FR 2610824A1 FR 8702174 A FR8702174 A FR 8702174A FR 8702174 A FR8702174 A FR 8702174A FR 2610824 A1 FR2610824 A1 FR 2610824A1
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femoral stem
plate
fingers
stem according
proximal portion
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FR8702174A
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French (fr)
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FR2610824B1 (en
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    • 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
    • A61F2/30721—Accessories
    • A61F2/30734—Modular inserts, sleeves or augments, e.g. placed on proximal part of stem for fixation purposes or wedges for bridging a bone defect
    • 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
    • A61F2002/30138—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
    • A61F2002/30329—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
    • A61F2002/30383—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by laterally inserting a protrusion, e.g. a rib into a complementarily-shaped groove
    • A61F2002/30387—Dovetail connection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30565—Special structural features of bone or joint prostheses not otherwise provided for having spring elements
    • A61F2002/30571—Leaf springs
    • 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
    • A61F2/3662—Femoral shafts
    • A61F2002/3678—Geometrical features
    • A61F2002/368—Geometrical features with lateral apertures, bores, holes or openings, e.g. for reducing the mass, for receiving fixation screws or for communicating with the inside of a hollow shaft
    • 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
    • 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
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00017—Iron- or Fe-based alloys, e.g. stainless steel
    • 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
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Abstract

This femoral rod is noteworthy in that it comprises an implantation pin 1a, optionally a plate 1b, a head 1c, a proximal flat part defining two side faces 1e, 1f, characterised in that the proximal part is arranged with a shape in its thickness designed to receive, whilst guiding and centering, at least one flexible means with a capacity for elastic deformation by itself or by complementary members bearing on at least one of the side faces of the said proximal part, when the rod is implanted in the medullary cavity.

Description

L'invention a pour objet une tige fémorale perfectionnbe pour prothèses de hanches implantées sans ciment de scellement. The subject of the invention is an improved femoral stem for prostheses of hips implanted without cementitious cement.

L'objet de l'invention se rattache au secteur technique des prothèses fémorales en général, plus particulièrement des prothèses destinées a remplacer la tette d'un fémur. The object of the invention relates to the technical sector of femoral prostheses in general, more particularly prostheses intended to replace the head of a femur.

On connait sur le marché des tiges fémorales dites rigides. Elles présentent d'une manière connue une broche d'implantation (1a), une platine (lob) d'appui sur la face supérieure du fémur surmontée d'une teste (lc > destinée a recevoir une cupule d'articulation-dans la cavité de la hanche, soit directement soit par I intermédiaire d'un cotyle artificiel. La broche (id) de la tige fémorale est du type cervico-cephalique, cest-å-dire qu'elle est implantée profondément dans le canal médullaire. There are known on the market so-called rigid femoral stems. They have in known manner an implantation pin (1a), a support plate (lob) on the upper face of the femur surmounted by a test piece (1c) intended to receive a hinge cup-in the cavity The spindle (id) of the femoral stem is of the cervico-cephalic type, that is to say that it is implanted deep in the medullary canal.

Ladite tige présente entre la platine et la broche une partie proximale (Id) méplate définissant deux faces latérales plates (le, if) tandis que les cotés antérieur et postérieur présentent de manière classique un profil curviligne pour pénétrer et s'adapter dans le canal médullaire.Said rod has between the plate and the pin a proximal portion (Id) flat defining two flat lateral faces (the, if) while the anterior and posterior sides conventionally have a curvilinear profile to penetrate and adapt in the medullary canal .

Une tige fémorale de ce type impîantée sans scellement, est exploitée par de nombreux fabricants Elle présente l'inconvénient d'une instabilité dans le canal médullaire. Le profil intérieur du canal médullaire varie selon les individus et on constate des micro-mouvements de la tige fémorale dans le plan transversal. Le phénomène est du au fait que l'os, le fémur en l'espèce, est soumis à un certain nombre de mouvements et est lui-même sujet à une certaine élasticité. De ce fait la tige fémorale peut se désaxer et entrai ne une certaine gEne ou handicap pour la personne appareillée. A femoral stem of this type impregnated without sealing, is exploited by many manufacturers It has the disadvantage of instability in the medullary canal. The internal profile of the medullary canal varies according to the individual and there are micro-movements of the femoral stem in the transverse plane. The phenomenon is due to the fact that the bone, the femur in this case, is subjected to a certain number of movements and is itself subject to a certain elasticity. As a result, the femoral stem may become misaligned and cause some inconvenience or handicap for the fitted person.

Le but recherché selon l'invention était donc de remédier à cette instabilité constatée. The purpose of the invention was therefore to remedy this instability found.

La solution trouvée est originale, simple, pratique à mettre en oeuvre. The solution found is original, simple, practical to implement.

Selon une première caractéristique de l'invention, la tige fémorale comprend une broche d'implantation, éventuellement une platine, une testes une partie proximale méplate définissant deux faces latérales, ladite tige étant caractérisée en ce que la partie proximale est agencée avec au moins une forme établie dans son épaisseur pour recevoir à guidage et centrage au moins un moyen souple à capacité élastique de déformation s'appliquant sur au moins une des faces latérales de ladite partie proximale. According to a first characteristic of the invention, the femoral stem comprises an implantation pin, possibly a platinum, a testes a flat proximal portion defining two lateral faces, said rod being characterized in that the proximal portion is arranged with at least one form established in its thickness to receive guiding and centering at least one flexible means with elastic deformation capacity applying to at least one of the lateral faces of said proximal portion.

Ces caractéristiques et d'autres ressortiront bien de la suite de la description. These and other features will be apparent from the rest of the description.

Pour fixer l'objet de l'invention illustrée d'une manitre non limitative aux figures des dessins oh
La figure 1 est une vue en perspective illustrant sé parlement une tige fémorale et des moyens à capacité élastique de déformation selon une première forme de réalisation
La figure 2 est une vue de c#té en coupe selon la figure i, une plaquette étant montée sur l'une des faces et l'autre étant en attente.To fix the object of the invention illustrated by a nonlimiting manner in the drawing figures oh
FIG. 1 is a perspective view illustrating a femoral stem and resilient deformation means according to a first embodiment;
FIG. 2 is a cross-sectional view according to FIG. 1, one plate being mounted on one of the faces and the other being on standby.

La figure 3 est une vue en coupe transversale scion la ligne de#la figure 2. Figure 3 is a cross-sectional view taken from the line of Figure 2.

La figure 4 illustre en perspective partielle une variante de réalisation des moyens à capacité élastique de déformation faisant office de platine. FIG. 4 illustrates, in partial perspective, an alternative embodiment of the means with elastic deformation capacity acting as platinum.

La figure 5 est une vue de c#té en coupe de la tige selon la figure 4 implantée dans le fémur. Figure 5 is a sectional view of the rod of Figure 4 implanted in the femur.

La figure 6 est une vue en coupe selon la ligne B-B de la figure 5. Figure 6 is a sectional view along the line B-B of Figure 5.

La figure 7 illustre une autre variante de réalisation de la liaison des moyens à capacité plastique. Figure 7 illustrates another embodiment of the connection of the plastic capacity means.

La figure 8 est une vue partielle en coupe illustrant une variante de déformation des moyens à capacité élastique. Figure 8 is a partial sectional view illustrating a variant of deformation means resilient capacity.

La figure 9 est une vue en coupe partielle selon la ligne C-C- de la figure 8. Figure 9 is a partial sectional view along the line C-C- of Figure 8.

La figure 10 est une vue en coupe montrant une autre variante selon laquelle la capacité élastique est obtenue par des organes complémentaires aux moyens souples.  FIG. 10 is a sectional view showing another variant according to which the elastic capacity is obtained by means complementary to the flexible means.

Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant d'une manière non limitative. In order to make the object of the invention more concrete, it is now described in a nonlimiting manner.

L'invention vise à agencer la partie proximale (id) de la tige pouvant avoir une configuration coudée ou rectiligne pour recevoir au moins sur l'une de ses faces latérales (le) ou (if), et de préférence sur les deux un moyen souple à capacité élastique de déformation. Ledit moyen souple déformable élasti- quement peut autre une plaquette (2) de profil et d'épaisseur désirées et en tous matériaux appropriés, tels que le titane, l'acier inoxydable.... Cette plaquette peut être de profil bombé longitudinalement (Figures 1. 2, 3) transversalement (figures 8- 9). Elle est disposée sur au moins une des faces latérales (le If) de la tige fémorale, et de préférence sur les deux.La plaquette est agencée notamment d'une manière non limitative avec des doigts (2.1) de positionnement susceptibles de s'adapter et de se centrer dans une ou des ouvertures (lg) établies dans la partie proximale de la tige fémorale avec le jeu nécessaire dans le sens de la déformation de la plaquette. Dans le cas de défor- mation longitudinale (Figures 1 2, 3) l'ouverture (ig) est réa- lisée de telle sorte que les doigts (2.1) puissent se déplacer selon les flèches (fi) lors de l'implantation de la tige dans le canal médullaire provoquant la déformation des plaquettes.Dans le cas de déformation transversale (Figures 8 et 9), on prévoit deux ouvertures (lg) parallèles autorisant le déplacement des doigts < 2.1) dans le sens transversal. Lesdits doigts étant alors disposés latéralement sous la plaquette pour permettre la déformation. The aim of the invention is to arrange the proximal part (id) of the rod that can have a bent or rectilinear configuration to receive at least on one of its lateral faces (the) or (if), and preferably on both a means flexible with elastic deformation capacity. Said elastically deformable flexible means may alternatively have a wafer (2) of desired profile and thickness and of any suitable material, such as titanium, stainless steel, etc. This wafer may be of curved profile longitudinally (FIGS. 1, 2, 3) transversely (FIGS. 8-9). It is disposed on at least one of the lateral faces (the If) of the femoral stem, and preferably on both. The wafer is arranged in a nonlimiting manner with positioning fingers (2.1) capable of adapting and centering in one or more openings (lg) established in the proximal portion of the femoral stem with the necessary clearance in the direction of the deformation of the wafer. In the case of longitudinal deformation (Figures 1 2, 3) the aperture (ig) is made so that the fingers (2.1) can move according to the arrows (fi) during the implantation of the stem in the medullary canal causing the deformation of the platelets.In the case of transverse deformation (Figures 8 and 9), there are two openings (lg) parallel allowing the movement of fingers <2.1) in the transverse direction. Said fingers then being arranged laterally under the wafer to allow deformation.

Selon une autre réalisation particulièrement visée et illustrée aux figures 4, 5, et 6, les moyens à capacité élasti- que de déformation sont des plaquettes (3 > de même conception mais présentant à une extrémité un talon (3a) établi pour que après montage des plaquettes dans les ouvertures de la partie proximale < id), lesdits talons s'étendant vers l'extérieur, servent de platine à la tige fémorale.Bien entendu, dans ce cas il est nécessaire que les plaquettes ne puissent se déplacer à ce niveau, c'est pourquoi les doigts (3b) disposés sous les talons sont ajustés dans un orifice (lh) de la partie proximale, tandis qu'à l'opposé les doigts inférieurs (3c) sont engagés dans une ouverture (li) autorisant leur déplacement longitudinal sous l'effet de la déformation. According to another embodiment particularly targeted and illustrated in Figures 4, 5 and 6, the elastically deformable means are platelets (3> of the same design but having at one end a heel (3a) established so that after mounting platelets in the apertures of the proximal portion <id), said heels extending outwards, serve as platinum to the femoral stem.Of course, in this case it is necessary that the platelets can not move at this level this is why the fingers (3b) arranged under the heels are fitted into an orifice (1h) of the proximal part, whereas on the opposite side the lower fingers (3c) are engaged in an opening (li) allowing their longitudinal displacement under the effect of the deformation.

fi la figure 7, on a illustré une autre forme de réali- sation des moyens a capacité élastique. On voit que les plaquettes < 4) sont recourbées a leur extrémité supérieure (4a) et présentent un profil transversal en section (4b) du type queue d'aronde ou autre profil équivalent, pour coopérer avec une rainure complémentaire (lj) réalisée transversalement sur les faces latérales de la partie proximale (li). On comprend que dans cette réalisation, la déformation des plaquettes s'opère du coté de leur extrémité inférieure en appui sur les faces latérales (le-lf).  FIG. 7 illustrates another embodiment of the elastic capacity means. It can be seen that the plates <4) are bent at their upper end (4a) and have a cross sectional cross section (4b) of the dovetail type or other equivalent profile, to cooperate with a complementary groove (lj) made transversely on the lateral faces of the proximal part (li). It is understood that in this embodiment, the deformation of the plates operates on the side of their lower end bearing on the side faces (the-lf).

Enfin, selon la réalisation illustré à la figure 10, les moyens à capacité élastique sont des barrettes (5) avec ou sans talon (5a) formant platine, et munis de doigts (5b) ou organes similaires de positionnement et de centrage dans une ouverture longitudinale (lk) de la partie proximale. Dans ce cas la déformation élastique est obtenue par des organes complémentaires interposés entre les faces en regard des barrettes. Ces organes peuvent Stre comme illustré des lames de ressort (6) dos à dos, ou encore un ou des blocs de matériau déformable et biocompatible. A noter que les barrettes ne se déforment pas mais sont rapprochées l'une de l'autre lors de l'implantation. Finally, according to the embodiment illustrated in FIG. 10, the elastic capacity means are bars (5) with or without a heel (5a) forming a plate, and provided with fingers (5b) or similar positioning and centering members in an opening longitudinal (lk) of the proximal part. In this case the elastic deformation is obtained by complementary members interposed between the facing faces of the bars. These members may be as illustrated back-to-back spring blades (6), or one or more blocks of deformable and biocompatible material. Note that the bars do not deform but are close to one another during implantation.

Les avantages ressortent bien de l'invention. On sou
ligne la meilleure tenue des tiges fémorales par un moyen
souple dans le canal médullaire, et le double roule desdits mo
yens, à savoir ancrage ajusté et platine d'appui. The advantages are apparent from the invention. We are
line the best holding of the femoral stems by a means
soft in the medullary canal, and the double rolls of these mo
yens, namely adjusted anchoring and support plate.

Claims (1)

REVENDICATIONS -1- Tige fémorale rigide perfectionnée implantée sans scellement pour prothèses de hanches du type comprenant une broche d'implantation (la) éventuellement une platine (1b), une tête (1c), une partie proximale méplate définissant deux faces latérales (les 1f), caractérisée en ce que la partie proximale est agencée avec une forme établie dans son épaisseur pour recevoir à guidage et centrage au moins un moyen souple à capacité élastique de déformation par lui-même ou par des organes complémentaires s'appliquant sur au moins une des faces latérales de ladite partie proximale lors de l'implantation de la tige dans le canal médullaire. -1- Advanced rigid femoral stem implanted without sealing for hip prostheses of the type comprising an implantation pin (la) optionally a plate (1b), a head (1c), a proximal flat portion defining two side faces (the 1f) , characterized in that the proximal portion is arranged with a shape established in its thickness to receive guiding and centering at least one flexible means with elastic deformation capacity by itself or by complementary members applying to at least one of lateral faces of said proximal portion during implantation of the stem into the medullary canal. Tige fémorale selon la revendication i, caractérisée en ce que ledit moyen souple et déformable est une plaquette- (2) agen cée avec des moyens de positionnement et de clipsage du type doigts (2.1) ou similaires dans ladite forme. Femoral stem according to claim 1, characterized in that said flexible and deformable means is a wafer (2) arranged with means for positioning and clipping of the fingers type (2.1) or the like in said shape. Tige fémorale selon les revendications 1 et 2 ensemble, ca- ractérisée en ce que la plaquette (2) est bombée longitudinale- ment. Femoral stem according to claims 1 and 2 together, characterized in that the plate (2) is curved longitudinally. -4- Tige fémorale selon les revendications 1 et 2 ensemble, ca- ractérisé en ce que la plaquette (2) est bombée transversal e- ment.-4- femoral stem according to claims 1 and 2 together, characterized in that the wafer (2) is curved transversely e-. -5- Tige fémorale selon la revendication 1. caractérisée en ce que le moyen souple et déformable est une plaquette < 3 > présen- tant à une extrémité un talon (a) constituant une platine d'appui sur le fémur.-5- femoral stem according to claim 1. characterized in that the flexible and deformable means is a plate <3> having at one end a heel (a) constituting a support plate on the femur. -b- Tige fémorale selon l'une quelconque des revendications i 2, 3, caractérisée en ce que la forme établie dans l'épaisseur de la partie proximale pour le positionnement et le centrage des doigts (2.1) est une ouverture longitudinale (iq) dimensionnée pour l'ajustement transversal desdits doigts et pour autoriser leur déplacement dans le sens longitudinal. Femoral stem according to any one of claims 1, 2, 3, characterized in that the shape established in the thickness of the proximal portion for the positioning and centering of the fingers (2.1) is a longitudinal opening (iq) dimensioned for the transverse adjustment of said fingers and to allow their movement in the longitudinal direction. -7- Tige fémorale selon lune quelconque des revendications 1, 2 et 4, caractérisée en ce que la plaquette (2) bombée transversalement présente à chaque extrémité deux doigts latéraux (2.1) coopérant par paires avec des ouvertures transversales et pa allèles (lg) dimensionnées pour l'ajustement desdits doigts dans leur largeur et pour autoriser leur déplacement dans leur longueur.-7- femoral stem according to any one of claims 1, 2 and 4, characterized in that the plate (2) convexly convex at each end two lateral fingers (2.1) cooperating in pairs with transverse openings and alleles (lg) dimensioned for the adjustment of said fingers in their width and to allow their movement in their length. -8- Tige fémorale selon la revendication 5, caractérisée en ce que la plaquette (3) à talon (3a) présente sous ledit talon un doigt (b) destiné à s'ajuster dans un orifice (lh) de la partie proximale, tandis qu'à l'autre extrémité de la plaquette en appui sur ladite partie proximale, un doigt (3c.) coopère avec une ouverture longitudinale (li) de ladite partie proximale dimen sionnée pour l'ajustement transversal dudit doigt et pour autoriser son déplacement dans le sens longitudinal.Femoral stem according to claim 5, characterized in that the plate (3) with a heel (3a) has under said heel a finger (b) intended to fit into an orifice (1h) of the proximal part, while that at the other end of the plate bearing on said proximal portion, a finger (3c.) cooperates with a longitudinal opening (li) of said proximal portion dimensioned for the transverse adjustment of said finger and to allow its movement in the longitudinal direction. -9- Tige fémorale selon la revendication 1. caractérisée en ce que le moyen souple et déformable est une plaquette (4) présen- tant une extrémité recourbée (4a) avec un profil en section (4b) conformé pour permettre la liaison de cette extrémité avec les faces latérales (le-lf) de la partie proximale de la tige équipée à cet effet de rainures transversales (li) de profil en section complémentaire ; l'autre extrémité de la plaquette étant en appui sur lesdites faces latérales.Femoral stem according to claim 1, characterized in that the flexible and deformable means is a plate (4) presenting a bent end (4a) with a sectional profile (4b) shaped to allow the connection of this end. with the lateral faces (the-lf) of the proximal portion of the rod equipped for this purpose with transverse grooves (li) of profile in complementary section; the other end of the wafer being supported on said side faces. -10- Tige fémorale selon la revendication i, caractérisée en ce que les moyens souples et déformables qui sont des barrettes (5) avec ou sans talons (5a) formant platine, sont positionnés et centrés par leurs doigts (5b) dans une ouverture (lk) de la partie proximale, de telle sorte que lesdits moyens puissent se rapprocher l'un de l'autre élastiquement par l'intermédiaire de moyens complémentaires (6) du type lames de ressorts ou blocs déformables en matériau bicompatible, interposés entre les faces en regard des barrettes.  Femoral stem according to claim 1, characterized in that the flexible and deformable means which are strips (5) with or without heels (5a) forming a plate, are positioned and centered by their fingers (5b) in an opening ( 1k) of the proximal part, such that said means can be brought closer to one another elastically via complementary means (6) of the spring leaf type or deformable blocks of bicompatible material, interposed between the faces next to the bars.
FR8702174A 1987-02-12 1987-02-12 IMPROVED FEMALE ROD FOR HIP PROSTHESES IMPLANTED WITHOUT CEMENT SEALING Expired - Fee Related FR2610824B1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2620022A1 (en) * 1987-09-08 1989-03-10 Teinturier Pierre TOTAL JOINT PROSTHESIS, ESPECIALLY HIP
EP0366603A1 (en) * 1988-10-26 1990-05-02 GebràœDer Sulzer Aktiengesellschaft Metallic flat stem for a femoral head prosthesis
EP0409769A1 (en) * 1989-07-18 1991-01-23 GebràœDer Sulzer Aktiengesellschaft Reinforcement for a bed of bone cement
EP0649639A1 (en) * 1993-10-20 1995-04-26 SULZER Medizinaltechnik AG Endoprosthetic shaft, especially of a femoral shaft prosthesis, with associated implant
US5507830A (en) * 1989-02-08 1996-04-16 Smith & Nephew Richards Inc. Modular hip prosthesis
FR2758256A1 (en) * 1997-01-16 1998-07-17 Aesculap Sa Humeral prosthesis for orthopaedic rehabilitation
EP1062923A3 (en) * 1999-06-23 2002-10-16 Plus Endoprothetik Ag Hip joint endoprostheses system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101848406B1 (en) * 2016-10-19 2018-04-12 주식회사 케이씨스 A stem for artificial hip joint and stem install method

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DE2555717A1 (en) * 1975-12-11 1977-06-16 Joachim Prof Dr Med Eichler Hip joint endoprosthesis anchorage plate - has central longitudinal slit for passage of shaft section
FR2412304A1 (en) * 1976-09-15 1979-07-20 Sampson Corp ELEMENT OF CONNECTION BETWEEN A PROSTHESIS AND A BONE
FR2425237A1 (en) * 1978-05-09 1979-12-07 Breard Francis Prosthetic femoral head with flexible shaft - comprising series of longitudinal elements fitting into head and rigid tip and sliding relative to each other
FR2464695A1 (en) * 1979-09-07 1981-03-20 Novex Foreign Trade Co Ltd MEDIUM CHANNEL PIN FOR USE IN REDUCING BONE FRACTURE
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EP0196258A2 (en) * 1985-03-27 1986-10-01 Jean-Alain Epinette Cementless femoral component of a hip prosthesis
EP0204919A1 (en) * 1985-06-12 1986-12-17 GebràœDer Sulzer Aktiengesellschaft Prosthesis of the head of the femur
EP0217034A1 (en) * 1985-08-30 1987-04-08 GebràœDer Sulzer Aktiengesellschaft Straight metal shaft for a femoral head prosthesis

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Publication number Priority date Publication date Assignee Title
FR2325355A1 (en) * 1975-09-24 1977-04-22 Howmedica INTERCALAR RING FOR THE STEM OF A METAL IMPLANTED BONE PROSTHESIS
DE2555717A1 (en) * 1975-12-11 1977-06-16 Joachim Prof Dr Med Eichler Hip joint endoprosthesis anchorage plate - has central longitudinal slit for passage of shaft section
FR2412304A1 (en) * 1976-09-15 1979-07-20 Sampson Corp ELEMENT OF CONNECTION BETWEEN A PROSTHESIS AND A BONE
FR2425237A1 (en) * 1978-05-09 1979-12-07 Breard Francis Prosthetic femoral head with flexible shaft - comprising series of longitudinal elements fitting into head and rigid tip and sliding relative to each other
FR2464695A1 (en) * 1979-09-07 1981-03-20 Novex Foreign Trade Co Ltd MEDIUM CHANNEL PIN FOR USE IN REDUCING BONE FRACTURE
EP0170982A1 (en) * 1984-07-26 1986-02-12 Ivica Jerkovic Joint endoprosthesis, especially hip joint prosthesis
EP0191182A1 (en) * 1985-02-07 1986-08-20 GebràœDer Sulzer Aktiengesellschaft Bone implant
EP0196258A2 (en) * 1985-03-27 1986-10-01 Jean-Alain Epinette Cementless femoral component of a hip prosthesis
EP0204919A1 (en) * 1985-06-12 1986-12-17 GebràœDer Sulzer Aktiengesellschaft Prosthesis of the head of the femur
EP0217034A1 (en) * 1985-08-30 1987-04-08 GebràœDer Sulzer Aktiengesellschaft Straight metal shaft for a femoral head prosthesis

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2620022A1 (en) * 1987-09-08 1989-03-10 Teinturier Pierre TOTAL JOINT PROSTHESIS, ESPECIALLY HIP
EP0308297A1 (en) * 1987-09-08 1989-03-22 Pierre Teinturier Total articular prosthesis, especially for the hip
EP0366603A1 (en) * 1988-10-26 1990-05-02 GebràœDer Sulzer Aktiengesellschaft Metallic flat stem for a femoral head prosthesis
CH675827A5 (en) * 1988-10-26 1990-11-15 Sulzer Ag
US5507830A (en) * 1989-02-08 1996-04-16 Smith & Nephew Richards Inc. Modular hip prosthesis
EP0409769A1 (en) * 1989-07-18 1991-01-23 GebràœDer Sulzer Aktiengesellschaft Reinforcement for a bed of bone cement
US5035714A (en) * 1989-07-18 1991-07-30 Sulzer Brothers Limited Reinforcement for a bone cement bed
EP0649639A1 (en) * 1993-10-20 1995-04-26 SULZER Medizinaltechnik AG Endoprosthetic shaft, especially of a femoral shaft prosthesis, with associated implant
FR2758256A1 (en) * 1997-01-16 1998-07-17 Aesculap Sa Humeral prosthesis for orthopaedic rehabilitation
EP1062923A3 (en) * 1999-06-23 2002-10-16 Plus Endoprothetik Ag Hip joint endoprostheses system

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