FR2701206A1 - Impacter equipment for a polyethylene core or cup for acetabular implant - Google Patents

Impacter equipment for a polyethylene core or cup for acetabular implant Download PDF

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Publication number
FR2701206A1
FR2701206A1 FR9301691A FR9301691A FR2701206A1 FR 2701206 A1 FR2701206 A1 FR 2701206A1 FR 9301691 A FR9301691 A FR 9301691A FR 9301691 A FR9301691 A FR 9301691A FR 2701206 A1 FR2701206 A1 FR 2701206A1
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FR
France
Prior art keywords
cup
core
head
cavity
fixed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
FR9301691A
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French (fr)
Inventor
Dr Boizot
Dr Simonnet
G Cohen
J Delfosse
Huc De Bat Jm
Dr Dore
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Medinov SA
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Medinov SA
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Filing date
Publication date
Application filed by Medinov SA filed Critical Medinov SA
Priority to FR9301691A priority Critical patent/FR2701206A1/en
Publication of FR2701206A1 publication Critical patent/FR2701206A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • A61F2/4609—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof of acetabular cups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4637—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for connecting or disconnecting two parts of a prosthesis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
    • A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
    • 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
    • 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
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30484—Mechanically expandable devices located on the first prosthetic part for locking into or onto the second prosthetic part
    • 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
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30505—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism spring biased
    • 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
    • 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
    • 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

Abstract

This apparatus, which comprises a spherical head (T) capable of interacting with a hemispherical cavity of the core or of the cup is noteworthy in that the head is in two parts (1) and (2) which are coupled with capacity of elastic movement towards one another, in order to be automatically expanded after introduction to the cavity, with a view to holding the core or the cup in position.

Description

Appareil impacteur d'un noyau ou d'une cuDule en nolvéthvlène nour implant cotvioïdien.  Impact device of a nucleus or a cuDule of nolvethvene nour cotvioïdien implant.

On rappelle qu'un implant cotyloïdien présente une cupule ou anneau métallique recevant un noyau, généralement en polyéthylène. It is recalled that an acetabular implant has a metal cup or ring receiving a core, generally made of polyethylene.

Eventuellement, l'implant peut également être constituer directement par une cupule en polyéthylène.Optionally, the implant can also be constituted directly by a polyethylene cup.

De tels implants sont destinés à remplacer la cavité cotyloïde de l'os iliaque pour permettre l'articulation d'une tête fémorale, généralement d'une prothèse de hanche. Such implants are intended to replace the acetabular cavity of the iliac bone to allow the articulation of a femoral head, generally of a hip prosthesis.

Le problème que se propose de résoudre l'invention, est d'implanter dans la cavité de l'os iliaque, une cupule en polyéthylène ou d'implanter un noyau dans une cupule métallique. The problem which the invention proposes to solve is to implant in the cavity of the iliac bone, a polyethylene cup or to implant a core in a metal cup.

Généralement, pour réaliser cette fonction, on utilise un appareil sous forme d'un manche équipé, à son extrémité, d'une tête sphérique dont la dimension correspond à la tête fémorale, c'est-à-dire à la cavité hémisphérique du noyau ou de la cupule. Cet appareil permet de ne pas déformer l'implant au moment de son impaction, à l'aide d'un marteau. Generally, to carry out this function, a device is used in the form of a handle equipped, at its end, with a spherical head whose dimension corresponds to the femoral head, that is to say to the hemispherical cavity of the nucleus or the cup. This device makes it possible not to deform the implant at the time of its impaction, using a hammer.

Par contre, compte-tenu de l'égalité des dimensions entre le diamètre externe de la tête sphérique et le diamètre interne de la cavité, des problèmes de tenue apparaissent, avec des risques d'échapper le noyau ou la cupule au moment de son impaction. Il est donc très difficile de manipuler le noyau ou la cupule. On the other hand, given the equality of dimensions between the external diameter of the spherical head and the internal diameter of the cavity, holding problems appear, with the risk of escaping the core or the cup at the time of its impaction . It is therefore very difficult to manipulate the nucleus or the cup.

Pour tenter de remédier à ces inconvénients, on a proposé de combiner la tête sphérique de l'impacteur avec des branches radiales présentant à leurs extrémités, des picots d'indexation aptes à coopérer avec des trous formés dans le bord périphérique du noyau ou de la cupule.  In an attempt to remedy these drawbacks, it has been proposed to combine the spherical head of the impactor with radial branches having at their ends, indexing pins capable of cooperating with holes formed in the peripheral edge of the core or of the cup.

De telles dispositions ne sont pas encore satisfaisantes, car elles sont susceptibles d'engendrer une déformation du noyau ou de la cupule en polyéthylène. Such arrangements are not yet satisfactory, because they are capable of causing a deformation of the core or of the polyethylene cup.

L'invention s'est fixée pour but de remédier à ces inconvénients, de manière simple, sûre, efficace et rationnelle. The object of the invention is to remedy these drawbacks in a simple, safe, effective and rational manner.

Le problème que se propose de résoudre l'invention est d'impacter un noyau en polyéthylène dans une cupule ou anneau métallique ou d'impacter directement une cupule en polyétylène dans la cavité cotyloïde, sans aucune déformation du noyau et de la cupule en polyéthylène et avec la possibilité de les manipuler et de les orienter au moment de l'impaction. The problem which the invention proposes to solve is to impact a polyethylene core in a metal cup or ring or to directly impact a polyethylene cup in the acetabular cavity, without any deformation of the core and of the polyethylene cup and with the possibility of manipulating and orienting them at the time of the impaction.

Pour résoudre un tel problème, il a été conçu et mis au point un appareil impacteur qui comprend une tête sphérique apte à coopérer avec la cavité hémisphérique du noyau ou de la cupule en polyéthylène, ladite tête étant en deux parties accouplées avec capacité de rapprochement élastique, pour être automatiquement expansées après introduction dans la cavité, en vue du maintien en position du noyau ou de la cupule. To solve such a problem, an impactor has been designed and developed which comprises a spherical head capable of cooperating with the hemispherical cavity of the polyethylene core or cup, said head being in two coupled parts with capacity for elastic approximation. , to be automatically expanded after introduction into the cavity, in order to maintain the position of the core or the cup.

La tête présente une partie fixe et une partie mobile. The head has a fixed part and a mobile part.

Pour résoudre le problème posé d'assurer le rapprochement puis l'expansion automatique par élasticité des parties constitutives de la tête, ces dernières sont accouplées au moyen d'une vis montée en combinaison avec un organe élastique. To solve the problem of ensuring the approximation and then automatic expansion by elasticity of the constituent parts of the head, the latter are coupled by means of a screw mounted in combination with an elastic member.

La vis est engagée librement dans un logement de la partie mobile pour être vissée dans la partie fixe, l'organe élastique étant monté dans un chambrage coaxial au logement et prend appui sur la partie fixe. The screw is freely engaged in a housing of the movable part to be screwed into the fixed part, the elastic member being mounted in a recess coaxial with the housing and bears on the fixed part.

Pour résoudre le problème posé de l'impaction et de la manipulation, la partie fixe est solidaire d'un manche de préhension. To solve the problem of impaction and manipulation, the fixed part is secured to a grip handle.

Compte-tenu de la forme de la cavité interne du noyau ou de la cupule en polyéthylène, chaque partie est constituée par une demi sphère. Given the shape of the internal cavity of the core or of the polyethylene cup, each part consists of a half sphere.

Avantageusement, chaque demi sphère présente un méplat. Advantageously, each half sphere has a flat.

Le méplat de la demi sphère fixe est solidaire d'une collerette fixée au manche, tandis que le méplat de la demi sphère mobile est indexé angulairement, en combinaison avec ladite colerette.The flat part of the fixed half sphere is secured to a flange fixed to the handle, while the flat part of the movable half sphere is angularly indexed, in combination with said flange.

L'invention est exposée, ci-après plus en détail à l'aide des dessins annexés, dans lesquels:
La figure 1 est une vue en perspective montrant avant montage, les éléments constitutifs de la tête de l'élément impacteur selon l'invention.The invention is set out below in more detail using the appended drawings, in which:
Figure 1 is a perspective view showing before assembly, the constituent elements of the head of the impactor element according to the invention.

La figure 2 est une vue en coupe montrant l'impaction d'un noyau en polyéthylène dans une cupule métallique au moyen de l'appareil. Figure 2 is a sectional view showing the impaction of a polyethylene core in a metal cup by means of the apparatus.

La figure 3 est, à grande échelle, une vue en coupe longitudinale de la tête de l'appareil. Figure 3 is, on a large scale, a longitudinal sectional view of the head of the device.

La figure 4 est une vue en perspective de l'appareil. Figure 4 is a perspective view of the apparatus.

L'appareil est du type de ceux comprenant une tête sphérique désignée dans son ensemble par (T) et apte à coopérer avec la cavité hémisphérique (NI) d'un noyau en polyéthylène (N) ou avec la cavité hémisphérique d'une cupule en polyéthylène. The device is of the type of those comprising a spherical head designated as a whole by (T) and able to cooperate with the hemispherical cavity (NI) of a polyethylene core (N) or with the hemispherical cavity of a cup in polyethylene.

L'exemple illustré aux figures des dessins montre l'impaction d'un noyau (N) dans une cupule métallique (C) positionné préalablement dans la cavité cotylolde de l'os iliaque (figure 2). The example illustrated in the figures of the drawings shows the impaction of a nucleus (N) in a metal cup (C) previously positioned in the acetabular cavity of the iliac bone (Figure 2).

Selon l'invention, la tête (T) est en deux parties (1) et (2) accouplées avec capacité de rapprochement élastique. L'une de ces parties (1) est fixe, tandis que l'autre (2) est mobile. Chaque partie (1) et (2) est constituée par une demi-sphère. Comme le montre figure 3, les deux parties (1) et (2) sont accouplées au moyen d'une vis (3) montée en combinaison avec un organe élastique (4), notamment sous forme d'un ressort. La vis (3) est engagée librement dans un logement (2a) de la demi-sphère mobile (2) pour être vissée dans la demi-sphère fixe (1). According to the invention, the head (T) is in two parts (1) and (2) coupled with elastic closeness. One of these parts (1) is fixed, while the other (2) is mobile. Each part (1) and (2) is constituted by a half-sphere. As shown in Figure 3, the two parts (1) and (2) are coupled by means of a screw (3) mounted in combination with an elastic member (4), in particular in the form of a spring. The screw (3) is freely engaged in a housing (2a) of the movable hemisphere (2) to be screwed into the fixed hemisphere (1).

Le ressort (4) est monté dans un chambrage (2b) formé coaxialement au logement (2a) et prend appui sur la face plane (la) de la demi-sphère fixe (1). Le ressort (4) maintient en position d'écartement les deux demi-sphères (1) et (2) de sorte que les faces planes (la) et (2d) sont maintenues en position d'écartement parallèle. The spring (4) is mounted in a recess (2b) formed coaxially with the housing (2a) and bears on the flat face (la) of the fixed hemisphere (1). The spring (4) maintains in the spacing position the two half-spheres (1) and (2) so that the planar faces (la) and (2d) are maintained in the parallel spacing position.

Chaque demi-sphère (1) et (2) présente un méplat périphérique (1b) (2c). Le méplat (1b) est solidaire directement d'une manière rapportée d'une colerette (5) fixée en bout d'un manche de préhension et d'impaction (6). Le méplat (2c), après accouplement de la demi-sphère mobile (2) au moyen de la vis (3), est indexé angulairement, en combinaison avec la colerette (5). Each hemisphere (1) and (2) has a peripheral flat (1b) (2c). The flat (1b) is directly attached in a reported manner to a flange (5) fixed at the end of a grip and impaction handle (6). The flat (2c), after coupling of the movable hemisphere (2) by means of the screw (3), is angularly indexed, in combination with the flange (5).

Le fonctionnement et l'utilisation de l'appareil selon l'invention sont particulièrement simples et efficaces.  The operation and use of the apparatus according to the invention are particularly simple and effective.

Au moment de l'engagement de la tête sphérique (T), dans la cavité correspondante du noyau en polyéthylène (N) (ou de la cupule), la demi-sphère mobile (2) est rapprochée par pression de la demi-sphère fixe (1), en comprimant le ressort (4). Après introduction de la tête dans la
cavité (N1), la demi-sphère mobile est automatiquement expansée sous
l'effet de détente du ressort (4), exerçant ainsi une force de pression dans
la cavité, de sorte que l'ensemble de la tête assure le maintien ferme et
efficace du noyau (N)
Les avantages ressortent bien de la description, en particulier on souligne et on rappelle la simplicité de réalisation et le maintien efficace du noyau ou de la cupule en polyéthylène sans aucune déformation, et avec la possibilité de le manipuler et de l'impacter. At the time of engagement of the spherical head (T), in the corresponding cavity of the polyethylene core (N) (or of the cup), the movable hemisphere (2) is brought closer by pressure to the fixed hemisphere (1), compressing the spring (4). After inserting the head into the
cavity (N1), the movable hemisphere is automatically expanded under
the relaxing effect of the spring (4), thus exerting a pressure force in
the cavity, so that the entire head provides firm hold and
effective of the nucleus (N)
The advantages emerge clearly from the description, in particular the simplicity of production and the effective maintenance of the polyethylene core or cup are underlined and recalled without any deformation, and with the possibility of handling and impacting it.

Claims (8)

REVENDICATIONS -1- Appareil impacteur d'un noyau ou d'une cupule en polyéthylène pour implant cotyloldien, l'appareil qui comprend une tête sphérique (T) apte à coopérer avec la cavité hémisphérique du noyau ou de la cupule, est caractérisé en ce que la tête est en deux parties (1) et (2) accouplées avec capacité de rapprochement élastique, pour être automatiquement expansées après introduction dans la cavité, en vue du maintien en position du noyau ou de la cupule.-1- Apparatus for impacting a core or a polyethylene cup for acetabular implant, the apparatus which comprises a spherical head (T) capable of cooperating with the hemispherical cavity of the core or of the cup, is characterized in that the head is in two parts (1) and (2) coupled with elastic closeness, to be automatically expanded after introduction into the cavity, in order to maintain the position of the core or the cup. -2- Appareil selon la revendication 1, caractérisé en ce que la tête (T) présente une partie fixe (1 ) et une partie mobile (2).-2- Apparatus according to claim 1, characterized in that the head (T) has a fixed part (1) and a movable part (2). -3- Appareil selon la revendication 2, caractérisé en ce que les deux parties (1) et (2) sont accouplées au moyen d'une vis (3) montée en combinaison avec un organe élastique (4).-3- Apparatus according to claim 2, characterized in that the two parts (1) and (2) are coupled by means of a screw (3) mounted in combination with an elastic member (4). -4- Appareil selon la revendication 3, caractérisé en ce que la vis (3) est engagée librement dans un logement (2a) de la partie mobile (2) pour être vissée dans la partie fixe (1), l'organe élastique (4) étant monté dans un chambrage (2b) coaxial au logement (2a) et prend appui sur la partie fixe (1).-4- Apparatus according to claim 3, characterized in that the screw (3) is freely engaged in a housing (2a) of the movable part (2) to be screwed into the fixed part (1), the elastic member ( 4) being mounted in a recess (2b) coaxial with the housing (2a) and bears on the fixed part (1). -5- Appareil selon la revendication 2, caractérisé en ce que la partie fixe (I) est solidaire d'un manche de préhension (6). -5- Apparatus according to claim 2, characterized in that the fixed part (I) is integral with a gripping handle (6). -6- Appareil selon la revendication 1, caractérisé en ce que chaque partie (1) et (2) est constituée par une demi sphère.-6- Apparatus according to claim 1, characterized in that each part (1) and (2) is constituted by a half sphere. -7- Appareil selon la revendication 6, caractérisé en ce que chaque demi sphère (1) et (2) présente un méplat périphérique (1 b) (2c).-7- Apparatus according to claim 6, characterized in that each half sphere (1) and (2) has a peripheral flat (1 b) (2c). en combinaison avec la colerette (5).  in combination with the collar (5). (6), le méplat (2c) de la demi sphère mobile (2) étant indexé angulairement (6), the flat (2c) of the movable hemisphere (2) being angularly indexed -8- Appareil selon la revendication 7, caractérisé en ce que le méplat (lob) de la demi sphère fixe (1) est solidiare d'une collerette (5) fixée au manche-8- Apparatus according to claim 7, characterized in that the flat (lob) of the fixed half sphere (1) is solidiare of a flange (5) fixed to the handle
FR9301691A 1993-02-09 1993-02-09 Impacter equipment for a polyethylene core or cup for acetabular implant Pending FR2701206A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9301691A FR2701206A1 (en) 1993-02-09 1993-02-09 Impacter equipment for a polyethylene core or cup for acetabular implant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9301691A FR2701206A1 (en) 1993-02-09 1993-02-09 Impacter equipment for a polyethylene core or cup for acetabular implant

Publications (1)

Publication Number Publication Date
FR2701206A1 true FR2701206A1 (en) 1994-08-12

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Country Link
FR (1) FR2701206A1 (en)

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DE4429026A1 (en) * 1994-08-16 1995-02-02 Mueller Wolfgang Inlay removal instrument for total endoprosthesis
EP0715836A1 (en) * 1994-12-08 1996-06-12 CEDIOR S.a.r.L Total shoulder endoprosthesis
DE19611249A1 (en) * 1996-03-22 1997-09-25 Cerasiv Gmbh Joint prosthesis and removal tool
EP0811360A2 (en) * 1996-06-07 1997-12-10 Johnson & Johnson Medical Limited Extraction device
DE19628193A1 (en) * 1996-07-12 1998-01-22 Eska Implants Gmbh & Co Insertion instrument for acetabular cup prosthesis
DE19704577A1 (en) * 1997-02-07 1998-08-13 Aesculap Ag & Co Kg Manipulating instrument for bone-joint components
DE19820721A1 (en) * 1998-04-30 1999-11-04 Ceramtec Ag Instrument for handling components of joint prostheses
WO1999056677A1 (en) * 1998-04-30 1999-11-11 Ceramtec Ag Instrument for manipulating components of joint prostheses
US6206929B1 (en) * 1998-03-27 2001-03-27 Depuy Orthopaedics, Inc. Bipolar hip prosthesis with locking head
US6336941B1 (en) 1998-08-14 2002-01-08 G. V. Subba Rao Modular hip implant with shock absorption system
DE10031271A1 (en) * 2000-06-27 2002-01-10 Paul Schwabe Implantation instrument for hip socket has implant and operating ends, clamping jaws with in-between tension springs, and guide.
WO2007042227A1 (en) * 2005-10-07 2007-04-19 Trokamed Gmbh Device for handling an artificial acetabular fossa
WO2011161166A1 (en) * 2010-06-25 2011-12-29 Ceramtec Gmbh Insertion instrument for inserting socket insets into hip sockets for hip endoprostheses
EP2457543A1 (en) * 2010-11-25 2012-05-30 Benoist Girard Sas Prosthetic acetabular cup inserter and impactor
RU2574375C2 (en) * 2010-06-25 2016-02-10 Керамтек Гмбх Installation instrument for placing inserts into cotyloid cavity for hip replacement

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4429026A1 (en) * 1994-08-16 1995-02-02 Mueller Wolfgang Inlay removal instrument for total endoprosthesis
US5741335A (en) * 1994-12-08 1998-04-21 Cedior Total shoulder prosthesis
EP0715836A1 (en) * 1994-12-08 1996-06-12 CEDIOR S.a.r.L Total shoulder endoprosthesis
FR2727857A1 (en) * 1994-12-08 1996-06-14 Cedior TOTAL SHOULDER PROSTHESIS
DE19611249A1 (en) * 1996-03-22 1997-09-25 Cerasiv Gmbh Joint prosthesis and removal tool
US6013082A (en) * 1996-06-07 2000-01-11 Johnson & Johnson Professional, Inc. Extraction device
EP0811360A3 (en) * 1996-06-07 1998-11-11 Johnson & Johnson Medical Limited Extraction device
EP0811360A2 (en) * 1996-06-07 1997-12-10 Johnson & Johnson Medical Limited Extraction device
DE19628193A1 (en) * 1996-07-12 1998-01-22 Eska Implants Gmbh & Co Insertion instrument for acetabular cup prosthesis
DE19628193C2 (en) * 1996-07-12 1998-06-04 Eska Implants Gmbh & Co Pelvic socket setting instrument
DE19704577A1 (en) * 1997-02-07 1998-08-13 Aesculap Ag & Co Kg Manipulating instrument for bone-joint components
DE19704577B4 (en) * 1997-02-07 2006-06-29 Aesculap Ag & Co. Kg Handling instrument of joint components with joint surfaces
US6206929B1 (en) * 1998-03-27 2001-03-27 Depuy Orthopaedics, Inc. Bipolar hip prosthesis with locking head
DE19820721A1 (en) * 1998-04-30 1999-11-04 Ceramtec Ag Instrument for handling components of joint prostheses
WO1999056677A1 (en) * 1998-04-30 1999-11-11 Ceramtec Ag Instrument for manipulating components of joint prostheses
US6468281B1 (en) 1998-04-30 2002-10-22 Ceramtec Ag Instrument for manipulating components of joint prostheses
US6336941B1 (en) 1998-08-14 2002-01-08 G. V. Subba Rao Modular hip implant with shock absorption system
DE10031271A1 (en) * 2000-06-27 2002-01-10 Paul Schwabe Implantation instrument for hip socket has implant and operating ends, clamping jaws with in-between tension springs, and guide.
DE10031271B4 (en) * 2000-06-27 2007-04-12 Paul Schwabe Hüftpfannenimplantationsgerät
WO2007042227A1 (en) * 2005-10-07 2007-04-19 Trokamed Gmbh Device for handling an artificial acetabular fossa
WO2011161166A1 (en) * 2010-06-25 2011-12-29 Ceramtec Gmbh Insertion instrument for inserting socket insets into hip sockets for hip endoprostheses
CN102958471A (en) * 2010-06-25 2013-03-06 陶瓷技术有限责任公司 Insertion instrument for inserting socket insets into hip sockets for hip endoprostheses
RU2574375C2 (en) * 2010-06-25 2016-02-10 Керамтек Гмбх Installation instrument for placing inserts into cotyloid cavity for hip replacement
US9289313B2 (en) 2010-06-25 2016-03-22 Ceramtec Gmbh Insertion instrument for inserting socket insets into hip sockets for hip endoprostheses
CN102958471B (en) * 2010-06-25 2017-04-26 陶瓷技术有限责任公司 Insertion instrument for inserting socket insets into hip sockets for hip endoprostheses
KR101824619B1 (en) 2010-06-25 2018-03-14 세람테크 게엠베하 Insertion instrument for inserting socket insets into hip sockets for hip endoprostheses
EP2457543A1 (en) * 2010-11-25 2012-05-30 Benoist Girard Sas Prosthetic acetabular cup inserter and impactor
US8834479B2 (en) 2010-11-25 2014-09-16 Stryker Ireland Limited Prosthetic acetabular cup inserter and impactor
AU2011253603B2 (en) * 2010-11-25 2016-11-24 Stryker European Operations Holdings Llc Prosthetic acetabular cup inserter and impactor

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