FR2699067A1 - Cotyloid cup with outer and inner shells - has outer shell made hemispherical in shape made from titanium, with slit on one side and apertures for fixing screw on other, and inner shell made of polyethylene - Google Patents

Cotyloid cup with outer and inner shells - has outer shell made hemispherical in shape made from titanium, with slit on one side and apertures for fixing screw on other, and inner shell made of polyethylene Download PDF

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Publication number
FR2699067A1
FR2699067A1 FR9215283A FR9215283A FR2699067A1 FR 2699067 A1 FR2699067 A1 FR 2699067A1 FR 9215283 A FR9215283 A FR 9215283A FR 9215283 A FR9215283 A FR 9215283A FR 2699067 A1 FR2699067 A1 FR 2699067A1
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Prior art keywords
shell
hemispherical
cup
slot
orifices
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Granted
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FR9215283A
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FR2699067B3 (en
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Billet Philippe
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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
    • A61F2/34—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
    • 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
    • A61F2002/30131—Rounded shapes, e.g. with rounded corners horseshoe- or crescent- or C-shaped or U-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
    • A61F2002/30316—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
    • A61F2002/30403—Longitudinally-oriented cooperating ribs and grooves on mating lateral surfaces of a mainly longitudinal 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
    • A61F2002/30537—Special structural features of bone or joint prostheses not otherwise provided for adjustable
    • A61F2002/30538—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation
    • A61F2002/3054—Special structural features of bone or joint prostheses not otherwise provided for adjustable for adjusting angular orientation about a connection axis or implantation axis for selecting any one of a plurality of radial orientations between two modular parts, e.g. Morse taper connections, at discrete positions, angular positions or continuous positions
    • 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
    • A61F2002/30594—Special structural features of bone or joint prostheses not otherwise provided for slotted, e.g. radial or meridian slot ending in a polar aperture, non-polar slots, horizontal or arcuate slots
    • 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
    • A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/34—Acetabular cups
    • A61F2002/3401—Acetabular cups with radial apertures, e.g. radial bores for receiving fixation screws
    • A61F2002/3403—Polar aperture
    • 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
    • A61F2002/3443—Acetabular cups with an anti-luxation elevated rim portion, e.g. on the inner shell
    • 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
    • A61F2002/348—Additional features
    • A61F2002/3482—Two hemispherical halves having completely different 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
    • 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
    • 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
    • A61F2230/0013—Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-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
    • 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

The cup consists of a hemispherical shell (1) with an open base (4), made from a rigid material which possesses a certain degree of elasticity, and an inner shell (2) which fits in the cup and is made from a semi-rigid material with a low friction coefficient. The outer shell (1) has a slit (3) across one half of its base, and three apertures (6) through its upper part for fixing screw located in line with natural lines of force. The slit (3) is some 2mm in width, extending vertically from the base of the outer shell to its edge, while the axes of the three apertures (6) pass through the centre of the outer shell. The outer shell is pref. made of titanium and the inner shell of polyethylene. USE/ADVANTAGE - Socket for hip joint prosthesis. Can be fitted without cement, using impact and screws.

Description

CUPULE COTYLOIDIENNE DÉFORMABLE A FIXATION
SANS CIMENT, PAR IMPACTAGE ET VIS
La présente invention a pour objet une cupule cotyloidienne déformable à fixation sans ciment, par impactage et vis.DEFORMABLE FASTENING COTYLOID CUP
CEMENT-FREE, IMPACT AND SCREW
The present invention relates to a deformable acetabular cup for cementless fixing, by impacting and screws.

Elle concerne le domaine chirurgical des prothèses implantables dans la cavité cotyloïde osseuse du bassin. It relates to the surgical field of implantable prostheses in the acetabular cavity of the pelvis.

De très nombreux modèles de coques acétabulaires artificielles ont été mis au point. Ils diffèrent, entre autres, par leur mode de fixation. En effet, ces prothèses peuvent être maintenues dans le cotyle iliaque par scellement, par une ou plusieurs vis ou par anneaux vissés, par impactage, par déformation élastique, ou par diverses combinaisons des techniques précédentes. Many models of artificial acetabular shells have been developed. They differ, among other things, by their method of fixation. In fact, these prostheses can be maintained in the iliac acetabulum by sealing, by one or more screws or by screwed rings, by impacting, by elastic deformation, or by various combinations of the preceding techniques.

Les prothèses scellées présentent toutes les formes imaginables de rainures, striures, découpes, alvéoles ou aspérités destinées à ancrer la cupule dans le ciment de scellement. Sealed prostheses have all conceivable forms of grooves, striations, cutouts, alveoli or asperities intended to anchor the cup in the cement.

Parmi les cotyles à fixation sans ciment, on peut citer à titre d'exemples:
- Le brevet FR 2 598 908, qui décrit une prothèse à fixation par impactage-vissage constituée d'une cupule de forme hémisphérique à fond ouvert comportant des pointes ainsi que des perforations pour l'impaction et la mise en place de vis de fixation dans le cotyle osseux.Examples of cementless fixation cups include:
- Patent FR 2 598 908, which describes a prosthesis with fixing by impact-screwing consisting of a cup of hemispherical shape with open bottom comprising points as well as perforations for the impact and the setting of fixing screws in the osseous cup.

- Le brevet FR 2 645 433, qui concerne une cupule composée de trois calottes sphériques: une calotte extérieure en matériau rigide dans laquelle sont découpées des languettes mobiles en forme de portions de secteurs sphériques définies par des fentes en arcs de cercles et dont la face externe est pourvue d'aspérités radiales destinées à permettre la fixation de la prothèse dans la cavité cycloidienne, une calotte intérieure en matériau dur à faible coefficient de frottement et une calotte intermédiaire en matière semi-rigide. - Patent FR 2 645 433, which relates to a cup composed of three spherical caps: an outer cap of rigid material in which are cut movable tongues in the form of portions of spherical sectors defined by slots in arcs of circles and the face of which external is provided with radial asperities intended to allow the fixing of the prosthesis in the cycloid cavity, an inner cap in hard material with low coefficient of friction and an intermediate cap in semi-rigid material.

- La prothèse cotyloidienne présentée dans le brevet FR 2 672 205, qui présente, découpée dans sa paroi, des languettes radialement déployables portant sur leur surface extérieure des aspérités pour l'ancrage de la cupule dans la paroi du cotyle. - The acetabular prosthesis presented in patent FR 2 672 205, which has, cut out from its wall, radially deployable tongues bearing on their outer surface asperities for anchoring the cup in the wall of the acetabulum.

- le brevet FR 2 675 039, qui décrit un implant cycloidien comportant un anneau vissé présentant des moyens aptes à assurer l'impaction dudit implant dans le fond de la cavité cotyloïde en évitant tout basculement. - Patent FR 2 675 039, which describes a cycloid implant comprising a screwed ring having means capable of ensuring the impaction of said implant in the bottom of the acetabular cavity while avoiding any tilting.

Les cotyles scellés présentent un risque de descellement progressif causé par la différence d'élasticité entre le ciment et l'os, due en particulier au vieillissement de ce dernier. En outre, la prise du ciment peut être la cause d'un échauffement de la cavité osseuse avec risque d'accident pour le malade. Sealed cups present a risk of progressive loosening caused by the difference in elasticity between the cement and the bone, due in particular to the aging of the latter. In addition, the cement can be the cause of a heating of the bone cavity with risk of accident for the patient.

Pour la plupart des prothèses cotyloidiennes fixées sans ciment, la répartition des charges est uniforme sur tout le pourtour du cotyle, et la direction générale des forces exercées sur la tête fémorale, mise en évidence par Pauwels, n'est pas prise en compte. Il en résulte une absence d'élasticité du cotyle, particulièrement à sa base, ce qui peut provoquer chez l'opéré des douleurs extrêmement pénibles.  For most acetabular prostheses fixed without cement, the load distribution is uniform over the entire periphery of the acetabulum, and the general direction of the forces exerted on the femoral head, highlighted by Pauwels, is not taken into account. This results in an absence of elasticity of the acetabulum, particularly at its base, which can cause extremely painful pain in the patient.

Le dispositif selon la présente invention a pour but de remédier à ces inconvenients. En effet, étant fixé sans ciment, il ne risque pas, avec le temps, de se désolidariser de lotos récepteur, et sa conception, non seulement permet de respecter les lignes de forces naturelles dites "lignes de Pauwels", mais également rend possibles les micro-mouvements naturels du cotyle entre la corne antérieure et la corne postérieure de l'os iliaque. The device according to the present invention aims to remedy these drawbacks. Indeed, being fixed without cement, it does not risk, over time, to dissociate from receiving lotos, and its design, not only makes it possible to respect the lines of natural forces called "Pauwels lines", but also makes possible the natural micro-movements of the acetabulum between the anterior horn and the posterior horn of the iliac bone.

Il est constitué par la combinaison d'une cupule hémisphérique métallique à fond ouvert et d'un insert emboîtable également hémisphérique, en matériau synthétique semi-rigide recevant la rotule fémorale, la cupule métallique comportant en partie basse une fente unique sur une moitié de l'hémisphère, en opposition à trois orifices permettant le passage de vis de fixation dans la direction des lignes de force. It consists of the combination of a metallic hemispherical cup with an open bottom and a nestable insert also hemispherical, made of semi-rigid synthetic material receiving the femoral patella, the metallic cup having at the bottom a single slot on one half of the hemisphere, in opposition to three orifices allowing the passage of fixing screws in the direction of the lines of force.

Sur les dessins annexés, donnés à titre d'exemple non limitatif d'une des formes de réalisation de l'objet de l'invention:
la figure 1 représente la cupule cotyloïde vue en élévation du côté intérieur, suivant la flèche B de la figure 2,
la figure 2 montre la même cupule vue de dessous, suivant la flèche A de la figure 1,
la figure 3 est une coupe verticale transversale passant par la fente inférieure, suivant les flèches C-C de la figure 1,
la figure 4 représente l'insert ou noyau emboîtable, vu de côté,
la figure 5 est une coupe suivant les flèches C-C de la figure 1 montrant les deux éléments assemblés
et la figure 6 représente dans les mêmes conditions une variante d'exécution anti-luxation du noyau emboîtable.In the accompanying drawings, given by way of nonlimiting example of one of the embodiments of the subject of the invention:
FIG. 1 represents the acetabular cup viewed in elevation from the inside, according to arrow B in FIG. 2,
FIG. 2 shows the same cup seen from below, along arrow A in FIG. 1,
FIG. 3 is a vertical transverse section passing through the lower slot, according to the arrows CC of FIG. 1,
FIG. 4 represents the insert or nestable core, seen from the side,
Figure 5 is a section along the arrows CC of Figure 1 showing the two elements assembled
and FIG. 6 represents, under the same conditions, an alternative form of anti-dislocation of the nestable core.

Le dispositif, figures 1 à 6, est constitué d'une coque hémisphérique 1 à fond ouvert se fixant dans la cavité cotyloïde, et dans laquelle peut s'emboîter un noyau 2 semi-rigide, également hémisphérique, dans lequel vient s'articuler la tête fémorale. The device, FIGS. 1 to 6, consists of a hemispherical shell 1 with an open bottom which is fixed in the acetabular cavity, and into which a semi-rigid core 2, also hemispherical, can fit, in which the femoral head.

La coque 1, ou cupule, est réalisée dans un matériau rigide présentant une certaine élasticité, de préférence en titane. The shell 1, or cup, is made of a rigid material having a certain elasticity, preferably made of titanium.

Elle comporte en partie basse une fente 3 dont la largeur est de l'ordre de 2 millimètres et s'étendant dans un plan sensiblement vertical, du fond ouvert 4 jusqu'au bord externe 5 de ladite cupule, de manière à couper totalement la moitié inférieure de 1 'hémisphère.  It has in the lower part a slot 3 whose width is of the order of 2 millimeters and extending in a substantially vertical plane, from the open bottom 4 to the outer edge 5 of said cup, so as to completely cut half hemisphere.

A l'opposé de cette fente, en partie haute, sont prévus trois trous 6, à parois sphériques, permettant le passage de trois vis (non représentées) destinées à être fixées dans le toit du cotyle osseux, suivant une orientation correspondant à la direction des lignes de forces naturelles, qui font un angle d'environ 16 degrés par rapport à la verticale. Opposite this slot, in the upper part, are provided three holes 6, with spherical walls, allowing the passage of three screws (not shown) intended to be fixed in the roof of the osseous cup, in an orientation corresponding to the direction lines of natural forces, which make an angle of about 16 degrees from the vertical.

Les axes des trois trous passent par le centre de la demi sphère. L'axe de l'un des trous se trouve dans le plan méridien passant par la fente 3 et fait avec l'axe de révolution 10 de la cupule 1 un angle E de 55 degrés. Les deux autres trous sont situés symétriquement de part et d'autre du premier, leurs axes faisant un angle de 40 degrés avec ledit axe de révolution et étant contenus dans deux plans méridiens formant un angle D de 33 degrés avec le plan de la fente 3. The axes of the three holes pass through the center of the half sphere. The axis of one of the holes is in the meridian plane passing through the slot 3 and makes with the axis of revolution 10 of the cup 1 an angle E of 55 degrees. The other two holes are located symmetrically on either side of the first, their axes making an angle of 40 degrees with said axis of revolution and being contained in two meridian planes forming an angle D of 33 degrees with the plane of slot 3 .

Le noyau emboîtable 2 est fabriqué dans un matériau synthétique semi-rigide, à faible coefficient de frottement, tel que le polyéthylène. Il comporte à sa périphérie des bossages 7 antirotatoires s'insérant dans des rainures 8 prévues à cet effet sur la paroi interne de la coque 1. The nestable core 2 is made of a semi-rigid synthetic material, with a low coefficient of friction, such as polyethylene. It has at its periphery anti-rotation bosses 7 which are inserted into grooves 8 provided for this purpose on the internal wall of the shell 1.

Dans une variante d'exécution, le noyau 2 présente une partie supérieure 9 proéminente débordant le plan d'ouverture du cotyle et destiné à diminuer les risques de luxation de l'articulation. In an alternative embodiment, the core 2 has a protruding upper part 9 extending beyond the opening plane of the acetabulum and intended to reduce the risks of dislocation of the joint.

Les caractéristiques des divers éléments constitutifs donnent à l'objet de l'invention un maximum d'effets utiles qui n'avaient pas été, à ce jour, obtenus par des dispositifs similaires.  The characteristics of the various constituent elements give the object of the invention a maximum of useful effects which had not, to date, been obtained by similar devices.

Claims (3)

REVENDICATIONS 10. Cupule cotyloidienne déformable à fixation sans ciment par impactage et vis, destinée à la réalisation de prothèses implantables dans la cavité cotyloïde osseuse du bassin, 10. Deformable acetabular cup for cementless fixation by impacting and screws, intended for the production of implantable prostheses in the acetabular cavity of the pelvis, caractérisé par la combinaison d'une coque (1) hémisphérique à fond ouvert (4) en matériau rigide présentant une certaine élasticité, et d'un noyau (2) emboîtable dans celle-ci, également hémisphérique, en matériau semi-rigide à faible coefficient de frottement, la coque (1) comportant en partie basse une fente (3) unique sur une moitié de l'hémisphère et, en partie haute, trois orifices (6) permettant le passage de vis de fixation orientées dans la direction des lignes de force naturelles ou "lignes de Pauwels". characterized by the combination of an open bottom hemispherical shell (1) (4) made of rigid material having a certain elasticity, and of a nestable core (2) therein, also hemispherical, made of semi-rigid material with low coefficient of friction, the shell (1) comprising at the bottom a single slot (3) over one half of the hemisphere and, at the top, three orifices (6) allowing the passage of fixing screws oriented in the direction of the lines of natural strength or "Pauwels lines". 20. Dispositif selon la revendication 1, se caractérisant par le fait que la coque (1) est réalisée en titane et le noyau (2) en polyéthylène. 20. Device according to claim 1, characterized in that the shell (1) is made of titanium and the core (2) of polyethylene. 30. Dispositif selon l'une quelconque des revendications précédentes, se caractérisant par le fait que la fente (3) a une largeur voisine de 2 millimètres et s'étend dans un plan sensiblement vertical, du fond ouvert (4) jusqu'au bord externe (5) de la coque (1), de manière à couper totalement la moitié inférieure de l'hémisphère. 30. Device according to any one of the preceding claims, characterized in that the slot (3) has a width close to 2 millimeters and extends in a substantially vertical plane, from the open bottom (4) to the edge outer (5) of the shell (1), so as to completely cut the lower half of the hemisphere. 40. Dispositif selon l'une quelconque des revendications précédentes, se caractérisant par le fait que les axes des trois orifices (6) passent par le centre de la coque (1), l'axe de l'un des orifices se trouvant dans le plan méridien passant par la fente (3) et faisant avec l'axe de révolution (10) de la coque (1) un angle (E) de 55 degrés, les deux autres orifices étant situés symétriquement de part et d'autre du premier, leurs axes faisant un angle de 40 degrés avec le susdit axe de révolution et étant contenus dans deux plans méridiens formant un angle (D) de 33 degrés avec le plan de la fente (3). 40. Device according to any one of the preceding claims, characterized in that the axes of the three orifices (6) pass through the center of the shell (1), the axis of one of the orifices being in the meridian plane passing through the slot (3) and making with the axis of revolution (10) of the shell (1) an angle (E) of 55 degrees, the other two orifices being located symmetrically on either side of the first , their axes making an angle of 40 degrees with the aforesaid axis of revolution and being contained in two meridian planes forming an angle (D) of 33 degrees with the plane of the slot (3). 50. Dispositif selon l'une quelconque des revendications précédentes, se caractérisant par le fait que le noyau (2) présente une partie haute (9) proéminente débordant le plan d'ouverture du cotyle et apte à diminuer les risques de luxation de l'articulation.  50. Device according to any one of the preceding claims, characterized in that the core (2) has a protruding upper part (9) extending beyond the opening plane of the acetabulum and capable of reducing the risks of dislocation of the joint.
FR9215283A 1992-12-11 1992-12-11 Deformable acetabular cup with cementless fixing, by impacting and screws. Expired - Lifetime FR2699067B3 (en)

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FR9215283A FR2699067B3 (en) 1992-12-11 1992-12-11 Deformable acetabular cup with cementless fixing, by impacting and screws.

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Application Number Priority Date Filing Date Title
FR9215283A FR2699067B3 (en) 1992-12-11 1992-12-11 Deformable acetabular cup with cementless fixing, by impacting and screws.

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FR2699067A1 true FR2699067A1 (en) 1994-06-17
FR2699067B3 FR2699067B3 (en) 1995-03-24

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2732212A1 (en) * 1995-03-29 1996-10-04 Billet Philippe Cotyloidal cup assembly for hip joint replacement prosthesis
EP0630624B1 (en) * 1993-06-17 1998-01-07 ROUX, Christiane Cotyloidal prosthesis, especially for coxofemoral joint
ES2114485A1 (en) * 1996-03-29 1998-05-16 Traiber S A Artificial bone cavity for bony joints (articulations)
US8123815B2 (en) 2008-11-24 2012-02-28 Biomet Manufacturing Corp. Multiple bearing acetabular prosthesis
US8308810B2 (en) 2009-07-14 2012-11-13 Biomet Manufacturing Corp. Multiple bearing acetabular prosthesis

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0630624B1 (en) * 1993-06-17 1998-01-07 ROUX, Christiane Cotyloidal prosthesis, especially for coxofemoral joint
FR2732212A1 (en) * 1995-03-29 1996-10-04 Billet Philippe Cotyloidal cup assembly for hip joint replacement prosthesis
ES2114485A1 (en) * 1996-03-29 1998-05-16 Traiber S A Artificial bone cavity for bony joints (articulations)
US8123815B2 (en) 2008-11-24 2012-02-28 Biomet Manufacturing Corp. Multiple bearing acetabular prosthesis
US9445903B2 (en) 2008-11-24 2016-09-20 Biomet Manufacturing, Llc Multi-bearing acetabular prosthesis
US8308810B2 (en) 2009-07-14 2012-11-13 Biomet Manufacturing Corp. Multiple bearing acetabular prosthesis
US9445904B2 (en) 2009-07-14 2016-09-20 Biomet Manufacturing, Llc Multiple bearing acetabular prosthesis

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