FR2708459A1 - Acetabulum for total hip prosthesis - Google Patents
Acetabulum for total hip prosthesis Download PDFInfo
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- FR2708459A1 FR2708459A1 FR9309347A FR9309347A FR2708459A1 FR 2708459 A1 FR2708459 A1 FR 2708459A1 FR 9309347 A FR9309347 A FR 9309347A FR 9309347 A FR9309347 A FR 9309347A FR 2708459 A1 FR2708459 A1 FR 2708459A1
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- Prior art keywords
- cup
- insert
- opening
- external
- acetabulum
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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
- A61F2002/30136—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
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30354—Cylindrically-shaped protrusion and recess, e.g. cylinder of circular basis
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30362—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 with possibility of relative movement between the protrusion and the recess
- A61F2002/30364—Rotation about the common longitudinal axis
- A61F2002/30367—Rotation about the common longitudinal axis with additional means for preventing said rotation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
- A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
- A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
- A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
- A61F2002/30378—Spherically-shaped protrusion and recess
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/34—Acetabular cups
- A61F2002/3429—Acetabular cups with an integral peripheral collar or flange, e.g. oriented away from the shell centre line
-
- 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
- A61F2230/0004—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
- 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
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
Description
COTYLE POUR PROTHESE TOTALE DE HANCHE
La présente invention concerne un cotyle non cimenté pour une prothèse totale de hanche.COTYL FOR TOTAL HIP PROSTHESIS
The present invention relates to an uncemented acetabulum for a total hip prosthesis.
Les prothèses totales de hanche sont composées de deux pièces articulées entre elles, à savoir une pièce fémorale, c'est-à-dire fixée au fémur, et une piece cotyloïdienne ou cotyle fixé dans le bassin du porteur de la prothèse. La fixation du cotyle est réalisée soit par cimentage avec un ciment acrylique soit par un procédé mécanique tel que vissage du cotyle, fixation du cotyle par des vis, expansion ou impaction du cotyle dans lotos. Total hip prostheses are composed of two parts hinged together, namely a femoral part, that is to say fixed to the femur, and an acetabular part or acetabulum fixed in the pelvis of the wearer of the prosthesis. The acetabulum is fixed either by cementing with an acrylic cement or by a mechanical process such as screwing the acetabulum, fixing the acetabulum by screws, expansion or impaction of the acetabulum in lotos.
Alors que les cotyles cimentés sont habituellement constitués d'un seul bloc en polyéthylène à haute densité, les cotyles non cimentés sont composés de deux parties, à savoir une cupule extérieure métallique, fixée à l'os, et une partie intérieure ou insert, en polyéthylène, qui est articulée avec la tête de la pièce fémorale de la prothèse. L'insert en polyéthylène a une surface extérieure de forme convexe, variable, s'adaptant à la surface interne de la cupule métallique du cotyle. La surface intérieure concave de l'insert a une forme hémisphérique pour recevoir la tête de la pièce fémorale.While cemented acetabular cups are usually made of a single block of high density polyethylene, non-cemented acetabular cups are composed of two parts, namely an external metal cup, fixed to the bone, and an internal part or insert, in polyethylene, which is articulated with the head of the femoral part of the prosthesis. The polyethylene insert has an external surface of convex, variable shape, adapting to the internal surface of the metal cup of the acetabulum. The concave inner surface of the insert has a hemispherical shape to receive the head of the femoral component.
Cet insert présente, à la base de sa partie externe convexe, une collerette ou un rebord annulaire en saillie vers l'extérieur, dans un plan sensiblement diamétral de l'articulation sphérique. Le rebord de l'insert en polyéthylène peut être circulaire mais il est plutôt fréquemment asymétrique de manière à être plus en saillie dans l'une de ses parties qui est destinée à être orientée soit vers le haut soit vers l'arrière, pour s'opposer efficacement aux risques d'instabilité et de luxation de la tête prothétique.This insert has, at the base of its convex external part, a flange or an annular rim projecting outwards, in a substantially diametral plane of the spherical joint. The edge of the polyethylene insert may be circular but it is rather frequently asymmetrical so as to be more projecting in one of its parts which is intended to be oriented either upwards or backwards, to effectively oppose the risks of instability and dislocation of the prosthetic head.
La liaison entre les deux parties de la prothèse de hanche à savoir la cupule métallique externe et l'insert en polyéthylène, doit donc répondre à trois nécessités, à savoir elles doivent être liées l'une à l'autre fermement, orientables et démontables et réutilisables. The connection between the two parts of the hip prosthesis, namely the external metal cup and the polyethylene insert, must therefore meet three requirements, namely they must be firmly linked to each other, orientable and removable and reusable.
On connaît actuellement divers moyens d'encastrement de l'insert en polyéthylène dans la cupule. Les uns sont de type géométrique, avec un crantage prévu à la fois sur l'insert et la cupule, d'autres comportent un relief circonférentiel s'encliquetant dans une rainure ou encore un fil métallique circonférentiel faisant ressort et s'inscrivant dans une rainure. Ces moyens d'encastrement connus présentent, à des degrés divers, plusieurs inconvénients. En effet, si la liaison entre l'insert et la cupule est trop lâche, il y a un risque de mobilisation de l'insert en polyéthylène, c'est-à-dire d'apparition d'un jeu entre celui-ci et la cupule, jeu provoquant un certain "flottement" de l'insert. Par ailleurs si la liaison entre l'insert et la cupule est par contre trop serrée, il est difficile voir impossible de modifier la position relative de l'insert par rapport à la cupule sans détruire l'insert. Par ailleurs, la prévision de crans, si elle permet de modifier la position angulaire de l'insert par rapport à la cupule de 20 en 200 ou de 10 en 100, limite les possibilités d'orientation angulaire de l'insert et empêche de choisir librement la position angulaire de l'insert dans la cupule. Enfin la complexité du mécanisme de fixation de l'insert, suivant les solutions antérieures, augmente de façon sensible le coût de fabrication des cotyles. Various means of embedding the polyethylene insert in the cup are currently known. Some are of the geometric type, with a notch provided on both the insert and the cup, others have a circumferential relief snapping into a groove or a circumferential metal wire springing and registering in a groove . These known mounting means have, to varying degrees, several drawbacks. Indeed, if the connection between the insert and the cup is too loose, there is a risk of mobilization of the polyethylene insert, that is to say of the appearance of a clearance between it and the cup, play causing a certain "floating" of the insert. Furthermore, if the connection between the insert and the cup is on the other hand too tight, it is difficult if not impossible to modify the relative position of the insert with respect to the cup without destroying the insert. Furthermore, the notch forecast, if it makes it possible to modify the angular position of the insert relative to the cup from 20 to 200 or from 10 to 100, limits the possibilities of angular orientation of the insert and prevents choosing freely the angular position of the insert in the cup. Finally, the complexity of the mechanism for fixing the insert, according to the previous solutions, significantly increases the cost of manufacturing the acetabulum.
La présente invention a pour but de remédier à ces inconvénients en procurant un cotyle de conception particulièrement simple, permettant d'obtenir une mise en position parfaitement libre de l'insert dans la cupule métallique, en choisissant au mieux l'orientation de la partie saillante du rebord de l'insert, une très bonne tenue de l'insert dans la cupule sans risque de migration de cet insert ou de modification de sa position, grâce à un effet de pince multiprise très efficace, et la possibilité d'extraire l'insert sans détériorer celui-ci et de le remettre en position en modifiant si nécessaire l'orientation du rebord saillant. The object of the present invention is to remedy these drawbacks by providing a cup of particularly simple design, making it possible to obtain a perfectly free positioning of the insert in the metal cup, by choosing as best as possible the orientation of the projecting part. of the edge of the insert, a very good hold of the insert in the cup without risk of migration of this insert or modification of its position, thanks to a very effective pliers effect, and the possibility of extracting the insert without damaging it and put it back in position, if necessary changing the orientation of the protruding rim.
A cet effet, ce cotyle non cimenté pour une prothèse totale de hanche, comportant une cupule extérieure métallique destinée à être fixée à l'os par un procédé mécanique, et un insert en matière plastique, notamment en polyéthylène, ayant une surface externe complémentaire de la surface interne de la cupule de manière à pouvoir être emboîté à force dans celle-ci, l'insert comportant une surface interne sphérique destinée à recevoir la tête de la prothèse fémorale et, autour de son ouverture, une collerette ou un rebord annulaire externe et transversal destiné à venir prendre appui contre le bord annulaire de la cupule entourant l'ouverture de celle-ci, la surface externe de l'insert comportant une partie cylindrique circulaire s'étendant à partir de son rebord, coaxiale avec celui-ci, et s'engageant dans une partie cylindrique complémentaire, de même rayon, de la surface interne de la cupule s'étendant à partir de son ouverture, caractérisé en ce que la partie cylindrique de la surface interne de la cupule est ondulée dans le sens circonférentiel et elle présente, sur ses ondulations, des stries longitudinales. To this end, this non-cemented acetabulum for a total hip prosthesis, comprising a metal external cup intended to be fixed to the bone by a mechanical process, and a plastic insert, in particular made of polyethylene, having an external surface complementary to the internal surface of the cup so that it can be force-fitted therein, the insert comprising a spherical internal surface intended to receive the head of the femoral prosthesis and, around its opening, a flange or an external annular rim and transverse intended to come to bear against the annular edge of the cup surrounding the opening thereof, the external surface of the insert comprising a circular cylindrical part extending from its rim, coaxial with the latter, and engaging in a complementary cylindrical part, of the same radius, of the internal surface of the cup extending from its opening, characterized in that q ue the cylindrical part of the inner surface of the cup is corrugated in the circumferential direction and it has, on its corrugations, longitudinal grooves.
On décrira ci-après, à titre d'exemple non limitatif, une forme d'exécution de la présente invention, en référence au dessin annexé sur lequel
- La figure 1 est une vue en perspective d'un cotyle suivant l'invention comportant une cupule et un insert séparés l'un de l'autre, avant leur emboîtement mutuel.An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the attached drawing in which
- Figure 1 is a perspective view of a cup according to the invention comprising a cup and an insert separated from each other, before their mutual nesting.
- La figure 2 est une vue en élévation, partiellement en coupe radiale, de la cupule et de l'insert représentés sur la figure 1, avant leur emboîtement mutuel. - Figure 2 is an elevational view, partially in radial section, of the cup and the insert shown in Figure 1, before their mutual engagement.
Le cotyle pour prothèse totale de hanche qui est représenté sur les figures 1 et 2, est composé de deux pièces à savoir une partie extérieure métallique ou cupule 1, destinée à venir au contact de l'os, et une partie intérieure ou insert 2 en polyéthylène (ou autre matière plastique équivalente) destinée à former une articulation avec la tête de la prothèse fémorale. The acetabulum for total hip prosthesis which is represented in FIGS. 1 and 2, is composed of two parts, namely an outer metallic part or cup 1, intended to come into contact with the bone, and an inner part or insert 2 in polyethylene (or other equivalent plastic) intended to form a joint with the head of the femoral prosthesis.
La cupule 1 est réalisée en un matériau métallique ou biocompatible notamment en titane ou alliage de titane. The cup 1 is made of a metallic or biocompatible material, in particular of titanium or titanium alloy.
Elle présente une surface externe 3 qui a la forme d'une hémisphère d'axe xx' mais qui pourrait être constituée par toute autre forme de surface appropriée. La cupule 1 est creuse et elle présente une surface interne, de révolution autour de l'axe xx' et qui est constituée de deux parties à savoir, dans le fond de la cupule 1, une surface 4 concave et lisse, par exemple en forme de calotte sphérique, d'axe xx', et autour de son ouverture, une surface interne lisse de base cylindrique 5, à section transversale circulaire, à laquelle se raccorde la calotte sphérique 4 et par conséquent de même rayon que la base de cette calotte sphérique. La surface cylindrique 5 délimite un bord annulaire la de la cupule 1.It has an external surface 3 which has the shape of a hemisphere with an axis xx 'but which could be constituted by any other form of suitable surface. The cup 1 is hollow and it has an internal surface, of revolution around the axis xx 'and which consists of two parts, namely, in the bottom of the cup 1, a concave and smooth surface 4, for example in shape of spherical cap, of axis xx ', and around its opening, a smooth internal surface of cylindrical base 5, of circular cross section, to which the spherical cap 4 is connected and therefore of the same radius as the base of this cap spherical. The cylindrical surface 5 delimits an annular edge 1a of the cup 1.
L'insert 2 présente, lui, une forme externe complémentaire de la forme interne de la cupule 1. The insert 2 has an external shape complementary to the internal shape of the cup 1.
Autrement dit, la surface externe convexe de l'insert 2 comprend une calotte sphérique lisse 6 de même rayon de courbure et de même hauteur que ceux de la calotte sphérique interne 4 de la cupule 1, puis une surface cylindrique lisse 7 de même rayon et de même hauteur que la surface cylindrique interne 5 de la cupule 1. De ce fait, l'insert 2 peut s'emboîter étroitement à l'intérieur de la cupule 1. L'insert 2 se termine par une collerette ou un rebord externe annulaire 8, d'axe xx', qui est destiné à venir s'appliquer contre le bord annulaire la de la cupule 1 lorsque l'insert 2 est emboîté dans celle-ci.In other words, the convex external surface of the insert 2 comprises a smooth spherical cap 6 of the same radius of curvature and of the same height as those of the internal spherical cap 4 of the cup 1, then a smooth cylindrical surface 7 of the same radius and of the same height as the internal cylindrical surface 5 of the cup 1. Therefore, the insert 2 can fit tightly inside the cup 1. The insert 2 ends in a flange or an annular external rim 8, of axis xx ', which is intended to come to bear against the annular edge 1a of the cup 1 when the insert 2 is fitted therein.
L'insert 2 présente également une surface interne 9 hémisphérique et lisse, destinée à recevoir la tête de la prothèse fémorale.The insert 2 also has a smooth hemispherical internal surface 9, intended to receive the head of the femoral prosthesis.
Suivant l'invention, la surface interne de base cylindrique 5 de la cupule 1 est ondulée régulièrement dans le sens circonférentiel, tout autour de l'axe de révolution xx', et cette surface ondulée 5 présente avantageusement des stries longitudinales Sa s'étendant dans des plans perpendiculaires à l'axe xx'. Pour l'assemblage des deux parties du cotyle, on introduit légèrement en force l'insert 2 dans la cupule 1, dans le sens de l'axe xx', ainsi qu'il est représenté par les flèches f sur les figures 1 et 2. Ceci provoque une certaine déformation de la surface externe cylindrique 7 de l'insert 2 en polyéthylène qui assure une fixation efficace résistant à l'arrachement et à la rotation de l'insert 2 par rapport à la cupule 1. La surface 5 ondulée et avantageusement striée agit comme une multitude d'ancrages à la manière d'une multitude de pinces multiprises s'opposant à la rotation et à l'arrachement de l'insert. According to the invention, the internal cylindrical base surface 5 of the cup 1 is corrugated regularly in the circumferential direction, all around the axis of revolution xx ', and this corrugated surface 5 advantageously has longitudinal ridges Sa extending in planes perpendicular to the axis xx '. For the assembly of the two parts of the acetabulum, the insert 2 is slightly forcefully inserted into the cup 1, in the direction of the axis xx ', as shown by the arrows f in FIGS. 1 and 2 This causes a certain deformation of the cylindrical external surface 7 of the polyethylene insert 2 which ensures an effective fixing resistant to tearing and rotation of the insert 2 relative to the cup 1. The corrugated surface 5 and advantageously striated acts as a multitude of anchors in the manner of a multitude of multi-grip pliers opposing the rotation and tearing of the insert.
La surface 5 ondulée et avantageusement striée peut être réalisée par contournage à la fraise ravageuse sur un centre d'usinage et de tournage. The corrugated and advantageously striated surface 5 can be produced by contouring with a devastating cutter on a machining and turning center.
Ce mode de fixation particulièrement simple et économique de l'insert 2 dans la cupule 1 permet en outre au chirurgien de modifier la position angulaire de l'insert 2 dans la cupule 1, par extraction et remise en position et ce, sans détérioration de l'insert et sans réduction d'efficacité de la fixation. This particularly simple and economical method of fixing the insert 2 in the cup 1 also allows the surgeon to modify the angular position of the insert 2 in the cup 1, by extraction and repositioning, without deterioration of the 'insert and without reduction of fixing efficiency.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9309347A FR2708459B1 (en) | 1993-07-29 | 1993-07-29 | Cup for total hip prosthesis. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9309347A FR2708459B1 (en) | 1993-07-29 | 1993-07-29 | Cup for total hip prosthesis. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2708459A1 true FR2708459A1 (en) | 1995-02-10 |
| FR2708459B1 FR2708459B1 (en) | 1995-10-20 |
Family
ID=9449759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9309347A Expired - Fee Related FR2708459B1 (en) | 1993-07-29 | 1993-07-29 | Cup for total hip prosthesis. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2708459B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0974316A1 (en) * | 1998-07-24 | 2000-01-26 | Michel Henry Fessy | Acetabular cup for hip prosthesis |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0091315A1 (en) * | 1982-04-07 | 1983-10-12 | National Research Development Corporation | Endoprosthetic bone joint devices |
| EP0144588A2 (en) * | 1983-12-12 | 1985-06-19 | GebràDer Sulzer Aktiengesellschaft | Hip joint cup |
| EP0190093A1 (en) * | 1985-01-11 | 1986-08-06 | Mecron Medizinische Produkte Gmbh | Artificial hip socket comprising a supporting element and an insertion piece |
| EP0499475A2 (en) * | 1991-02-14 | 1992-08-19 | SMITH & NEPHEW RICHARDS, INC. | Acetabular prosthesis with anchoring pegs |
-
1993
- 1993-07-29 FR FR9309347A patent/FR2708459B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0091315A1 (en) * | 1982-04-07 | 1983-10-12 | National Research Development Corporation | Endoprosthetic bone joint devices |
| EP0144588A2 (en) * | 1983-12-12 | 1985-06-19 | GebràDer Sulzer Aktiengesellschaft | Hip joint cup |
| EP0190093A1 (en) * | 1985-01-11 | 1986-08-06 | Mecron Medizinische Produkte Gmbh | Artificial hip socket comprising a supporting element and an insertion piece |
| EP0499475A2 (en) * | 1991-02-14 | 1992-08-19 | SMITH & NEPHEW RICHARDS, INC. | Acetabular prosthesis with anchoring pegs |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0974316A1 (en) * | 1998-07-24 | 2000-01-26 | Michel Henry Fessy | Acetabular cup for hip prosthesis |
| FR2781361A1 (en) * | 1998-07-24 | 2000-01-28 | Michel Henry Fessy | COTYL FOR HIP PROSTHESIS |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2708459B1 (en) | 1995-10-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| TP | Transmission of property | ||
| ST | Notification of lapse | ||
| RN | Application for restoration | ||
| IC | Decision of the director general to declare irreceivable or to reject an appeal |
Free format text: BO 99/29, PAGES: 282, IL Y A LIEU D AJOUTER: LE BREVET 9309347 |