FR2682286A1 - System for fitting an expandable acetabulum, and expandable acetabulum provided with such a system - Google Patents

System for fitting an expandable acetabulum, and expandable acetabulum provided with such a system Download PDF

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Publication number
FR2682286A1
FR2682286A1 FR9112721A FR9112721A FR2682286A1 FR 2682286 A1 FR2682286 A1 FR 2682286A1 FR 9112721 A FR9112721 A FR 9112721A FR 9112721 A FR9112721 A FR 9112721A FR 2682286 A1 FR2682286 A1 FR 2682286A1
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France
Prior art keywords
acetabulum
expandable
link
petals
groove
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Pending
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FR9112721A
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French (fr)
Inventor
Fornell Jacques
Berthoumieux Philippe
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SIMC SARL
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SIMC SARL
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Priority to FR9112721A priority Critical patent/FR2682286A1/en
Publication of FR2682286A1 publication Critical patent/FR2682286A1/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
    • A61F2/32—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
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30331—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements made by longitudinally pushing a protrusion into a complementarily-shaped recess, e.g. held by friction fit
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30476—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements locked by an additional locking mechanism
    • A61F2002/30487—Circumferential cooperating grooves and beads on cooperating 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
    • A61F2002/30329—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
    • A61F2002/305—Snap 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
    • A61F2002/30579—Special structural features of bone or joint prostheses not otherwise provided for with mechanically expandable devices, e.g. fixation devices
    • 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
    • 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
    • A61F2002/30604—Special structural features of bone or joint prostheses not otherwise provided for modular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/3082—Grooves
    • A61F2002/30822—Circumferential grooves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30841—Sharp anchoring protrusions for impaction into the bone, e.g. sharp pins, spikes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30891—Plurality of protrusions
    • A61F2002/30894—Plurality of protrusions inclined obliquely with respect to each other
    • 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

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Transplantation (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Prostheses (AREA)

Abstract

The invention relates to a system making it possible to hold the expandable acetabulum (1) in a state of maximum prestress using a peripheral tie (6) fitted with a handle (7) which allows manual detachment of the said tie while also bearing on the mandrel (8) temporarily introduced into the said acetabulum (1), in order instantaneously to release the acetabulum after it has been fitted inside the cotyloid cavity (acetabulum).

Description

SYSTEME POUR LA MISE EN PLACE D'UN COTYLE EXPANSIBLE ET
COTYLE EXPANSIBLE POURVU D'UN TEL SYSTEME.SYSTEM FOR PLACING AN EXPANDABLE COTYL AND
EXPANDABLE COTYLE PROVIDED WITH SUCH A SYSTEM.

La présente invention concerne un système de mise en place d'un cotyle expansible dans la cavité de l'os coxal en vue de recevoir la cupule d'articulation de la tête de la prothèse fémorale. The present invention relates to a system for placing an expandable acetabulum in the cavity of the coxal bone in order to receive the articulation cup of the head of the femoral prosthesis.

Selon la méthode connue pour introduire un cotyle expansible dans la cavité de l'os coxal ledit cotyle, qui comporte des pétales métalliques élastiques, est contracté en diamètre au niveau de son entrée au moyen d'une pince spéciale qui permet de le larguer à l'intérieur de ladite cavité où il se fixe par son élasticité, y étant retenu par les aspérités qu'il comporte. According to the known method for introducing an expandable acetabulum into the cavity of the coxal bone, said acetabulum, which has elastic metal petals, is contracted in diameter at its entry by means of a special clamp which allows it to be dropped at the inside said cavity where it is fixed by its elasticity, being retained there by the roughness which it comprises.

Les pinces nécessaires pour cet usage sont un outil complexe qui par l'encombrement de leurs mâchoires placées à la périphérie externe de l'ouverture du cotyle ne facilitent pas sa mise en place. The pliers necessary for this use are a complex tool which, due to the size of their jaws placed at the external periphery of the opening of the acetabulum, does not facilitate its positioning.

Le présent système permet de simplifier considérablement l'opération de mise en place à l'intérieur de la cavité de l'os coxal du cotyle qui, de fabrication, est maintenu en état de pré-contrainte maximale à l'aide d'un matériel particulièrement simple et peu onéreux qui consiste en un lien souple et inextensible qui ceinture la base du cotyle expansible dans une gorge périphérique extérieure, ce qui libère le cotyle de tout organe externe encombrant, et facilite sa parfaite orientation recherchée. The present system makes it possible to considerably simplify the operation of placing inside the cavity of the coxal bone of the acetabulum which, during manufacture, is maintained in a state of maximum pre-stress using a material. particularly simple and inexpensive which consists of a flexible and inextensible link which encircles the base of the expandable acetabulum in an external peripheral groove, which frees the acetabulum from any bulky external organ, and facilitates its perfect desired orientation.

On comprend qu'alors il suffira d'exercer une traction sur le lien périphérique qui assure la pré-contrainte du cotyle, en immobilisant par tailleurs le cotyle lui-même dans la cavité cotyloidienne où il a été facilement placé selon l'orientation précise nécessaire, pour provoquer l'arrachement dudit lien, ce qui libère les pétales du cotyle qui s'épanouissent instantanément et dont les picots externes d'ancrage pénètrent dans la paroi cotyloidienne du squelette, fixant le cotyle définitivement en position convenable. We understand that then it will be enough to exert a traction on the peripheral link which ensures the pre-stress of the acetabulum, by immobilizing the acetabulum itself in the acetabular cavity where it has been easily placed according to the precise orientation required , to cause the tearing of said link, which releases the petals of the acetabulum which open out instantly and whose external anchoring pins penetrate into the acetabular wall of the skeleton, fixing the acetabulum definitively in a suitable position.

La figure 1 est une vue en coupe verticale diamétrale d'un cotyle expansible selon l'invention. Figure 1 is a diametrical vertical sectional view of an expandable cup according to the invention.

La figure 2 est une vue en coupe verticale diamétrale dudit cotyle muni de lien qui le maintien en état de pré-contrainte. FIG. 2 is a view in diametral vertical section of said cup provided with a link which keeps it in a pre-stressed state.

La figure 3 est une vue en coupe verticale diamétrale du cotyle à l'instant où il va être libéré par l'arrachement du lien. Figure 3 is a diametrical vertical sectional view of the acetabulum at the time when it will be released by the tearing of the link.

La figure 4 est une vue partielle du mandrin participant au système, montrant le moyen d'immobilisation dudit mandrin à l'intérieur du cotyle. Figure 4 is a partial view of the mandrel participating in the system, showing the means for immobilizing said mandrel inside the acetabulum.

La figure 5 est une vue macroscopique partielle montrant en coupe le logement périphérique du lien de pré-contrainte.  Figure 5 is a partial macroscopic view showing in section the peripheral housing of the preload link.

Le cotyle expansible 1 destiné à recevoir la prothèse fémorale se présente sous la forme d'une calotte sphérique creuse, découpée en pétales 2 selon des méridiens, solidaires entre eux au niveau du pôle 3 de ladite calotte. The expandable acetabulum 1 intended to receive the femoral prosthesis is in the form of a hollow spherical cap, cut into petals 2 along meridians, integral with each other at the pole 3 of said cap.

Sur la périphérie externe du cotyle, à la base de chaque pétale, est pratiquée la gorge 4 située en dessous des éléments d'ancrage formés par les picots 5. On the outer periphery of the acetabulum, at the base of each petal, is made the groove 4 located below the anchoring elements formed by the pins 5.

Le lien 6 fait d'une matière souple mais non extensible tel le Kevlar' (marque déposée), est installé par le fabricant du cotyle dans la gorge 4 quand le cotyle est mis dans son état de contrainte maximale. Ladite gorge 4 présentant en coupe diamétrale un profil dissymétrique, son bord supérieur 11 étant parallèle au plan de ladite gorge et son bord inférieur 12 étant incliné vers l'extérieur du cotyle afin de faciliter l'échappement du lien 4 vers le bas. The link 6 made of a flexible but not extensible material such as Kevlar '(registered trademark), is installed by the manufacturer of the cup in the groove 4 when the cup is put in its state of maximum stress. Said groove 4 having in diametrical section an asymmetrical profile, its upper edge 11 being parallel to the plane of said groove and its lower edge 12 being inclined towards the outside of the acetabulum in order to facilitate the escape of the link 4 downwards.

Le cotyle 1 est ainsi maintenu dans cet état de pré-contrainte jusqu'à arrachement dudit lien 6, qui comporte à cet effet l'anse 7 de même matière, reliée diamétralement au lien 6, qui permet d'exercer sur ce dernier la traction nécessaire à son arrachement. The acetabulum 1 is thus maintained in this state of pre-stress until tearing of said link 6, which for this purpose comprises the handle 7 of the same material, diametrically connected to the link 6, which makes it possible to exert traction on the latter necessary for its removal.

L'arrachement du lien 6 sous l'effet de la traction exercée par l'anse 7 est facilité par l'inclinaison vers le bas du cotyle 1 du bord inférieur 12 de la gorge 6. The tearing of the link 6 under the effect of the traction exerted by the handle 7 is facilitated by the downward inclination of the cup 1 of the lower edge 12 of the groove 6.

Le dispositif est complété par le mandrin auxiliaire 8 qui comporte à une de ses extrémités l'épanouissement en forme de dôme 9 destiné à prendre appui sur la face interne du cotyle, au niveau de son pôle, et à son autre extrémité la zone de préhension manuelle 10. The device is completed by the auxiliary mandrel 8 which has at one of its ends the dome-shaped opening 9 intended to bear on the internal face of the acetabulum, at its pole, and at its other end the gripping zone. manual 10.

L'extrémité en forme de dôme 9 du mandrin 6 comporte avantageusement sur sa surface extérieure au moins trois picots 14, parallèles à l'axe du mandrin 6, régulièrement répartis autour de son centre de telle manière qu'ils pénètrent naturellement dans les ouvertures 15 qui forment le fond des saignées radiales 16 qui séparent chaque pétale 2. The dome-shaped end 9 of the mandrel 6 advantageously comprises on its external surface at least three pins 14, parallel to the axis of the mandrel 6, regularly distributed around its center so that they penetrate naturally into the openings 15 which form the bottom of the radial grooves 16 which separate each petal 2.

On comprend qu'un cotyle ainsi équipé du lien 6 au moment de sa fabrication sera livré au praticien dans son état de pré-contrainte maximale maintenue par ledit lien. It is understood that a cup thus equipped with the link 6 at the time of its manufacture will be delivered to the practitioner in its state of maximum pre-stress maintained by said link.

Le praticien aura ainsi toute facilité de positionner de la façon la plus simple, manuellement, le cotyle dans la cavité cotyloîdienne selon l'orientation désirée. The practitioner will thus have every facility for positioning the acetabulum in the simplest way, manually, in the acetabular cavity according to the desired orientation.

Il suffira alors que, plaçant le mandrin auxiliaire 8 à l'intérieur du cotyle 1 de manière à faire pénétrer les picots 14 dans les ouvertures 15 pour que le cotyle se trouve immobilisé par le mandrin 8 dans la position désirée. Assurant alors d'une main le maintien de son extrémité 9 au contact de la face interne du cotyle par une pression sur ledit mandrin, le praticien tirera de l'autre main sur l'anse 7 dans le sens de la flèche A (fig 3) pour que le lien 6 ceinturant le cotyle 1 soit immédiatement arraché, provoquant l'expansion instantanée des pétales 2 qui s'ancreront avec force dans la paroi osseuse par l'intermédiaire des picots 5 dans la position initialement prévue. It will then suffice that, placing the auxiliary mandrel 8 inside the acetabulum 1 so as to make the pins 14 penetrate into the openings 15 so that the acetabulum is immobilized by the mandrel 8 in the desired position. Then ensuring with one hand the maintenance of its end 9 in contact with the internal face of the acetabulum by pressing on said mandrel, the practitioner will pull with the other hand on the handle 7 in the direction of arrow A (fig 3 ) so that the link 6 encircling the acetabulum 1 is immediately torn off, causing the instantaneous expansion of the petals 2 which will be anchored with force in the bone wall by means of the pins 5 in the position initially provided.

L'arrachement du lien est facilité par la forme particulière de la gorge 4 qui présente, en coupe verticale, une forme dissymétrique par rapport à son plan médian, son bord supérieur 12 étant parallèle au plan de ladite gorge et son bord inférieur 13 étant incliné vers l'extérieur du cotyle 1. The tearing of the link is facilitated by the particular shape of the groove 4 which has, in vertical section, an asymmetrical shape relative to its median plane, its upper edge 12 being parallel to the plane of said groove and its lower edge 13 being inclined towards the outside of the cup 1.

La cupule destinée à recevoir directement la prothèse fémorale pourra alors être installée à l'intérieur du cotyle où elle sera retenue par le moyen prévu à cet effet, celui-ci étant, ici, à titre d'exemple, la nervure mâle 11 qui coopère avec une gorge complémentaire prévue à la base de la cupule pour assurer son encliquetage automatique. The cup intended to directly receive the femoral prosthesis can then be installed inside the acetabulum where it will be retained by the means provided for this purpose, the latter being, here, by way of example, the male rib 11 which cooperates with a complementary groove provided at the base of the cup to ensure its automatic latching.

On constate les avantages que présente l'invention, le praticien ayant en main un cotyle expansible aseptique qui lui est livré pré-contraint, donc immédiatement utilisable, alors que sans ce dispositif, il lui était nécessaire de placer lui-même le cotyle dans la pince de pré-contrainte, ce qui était une perte de temps préjudiciable au patient. We see the advantages of the invention, the practitioner having in hand an aseptic expandable cup which is delivered to him pre-constrained, therefore immediately usable, while without this device, he had to place the cup himself in the pre-stress clamp, which was a waste of time detrimental to the patient.

Il dispose en outre d'un cotyle libre de tout appareil encombrant qu'il peut ainsi positionner manuellement avec une extrême précision. It also has a cup free of any bulky device which it can thus position manually with extreme precision.

Son ancrage du cotyle en bonne position est ainsi opéré sans perte de temps, la mise en place du mandrin 8 à l'intérieur du cotyle étant immédiate après le positionnement correct du cotyle et son immobilisation provisoire au cours de l'opération de mise en place étant assurée grâce aux picots 14 pénétrant dans les ouvertures 15. De même l'arrachement du lien 6 par la manoeuvre de l'anse 7, qui provoque Instantanément l'épanouissement du cotyle est une opération simple et instantanée. Autant de gains de temps éminemment favorables en ce que cela écourte une intervention chirurgicale sanglante. Its anchoring of the acetabulum in good position is thus operated without loss of time, the positioning of the mandrel 8 inside the acetabulum being immediate after the correct positioning of the acetabulum and its temporary immobilization during the installation operation being ensured by the pins 14 entering the openings 15. Similarly the tearing of the link 6 by the operation of the handle 7, which instantly causes the opening of the acetabulum is a simple and instantaneous operation. So much time savings eminently favorable in that it shortens a bloody surgical intervention.

Outre qu'il s'agit d'un système particulièrement peu onéreux.  Besides that it is a particularly inexpensive system.

Claims (9)

REVENDICATIONS 1") Système pour la mise en place d'un cotyle expansible dans la cavité de l'os coxal, ledit cotyle, de forme hémisphérique, étant constitué de pétales métalliques élastiques (2), caractérisé en ce que le cotyle expansible (1) se présente, de fabrication, maintenu en état de pré-contrainte maximale, le moyen de maintien en cet état étant constitué par le lien périphérique (6) capable d'être supprimé manuellement de façon instantanée en vue de libérer les pétales élastiques (2) dès la mise en place dudit cotyle à l'intérieur de la cavité cotylöïdienne.  1 ") System for placing an expandable acetabulum in the cavity of the coxal bone, said acetabulum, of hemispherical shape, consisting of elastic metal petals (2), characterized in that the expandable acetabulum (1) comes, from manufacture, maintained in the state of maximum pre-stress, the means for maintaining in this state being constituted by the peripheral link (6) capable of being removed manually instantaneously in order to release the elastic petals (2) as soon as said acetabulum is placed inside the acetabular cavity. 2") Système pour la mise en place d'un cotyle expansible selon la revendication 1, caractérisé en ce que le lien (6) est placé dans une gorge (4) pratiquée à la périphérie externe dudit cotyle, à la base de l'ensemble des pétales (2). 2 ") System for the establishment of an expandable acetabulum according to claim 1, characterized in that the link (6) is placed in a groove (4) formed at the external periphery of said acetabulum, at the base of the set of petals (2). 3 ) Système pour la mise en place d'un cotyle expansible selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le lien (6) maintenant le cotyle expansible (1) en état de pré-contrainte est fait d'une matière souple mais non extensible. 3) System for the establishment of an expandable acetabulum according to any one of claims 1 or 2, characterized in that the link (6) holding the expandable acetabulum (1) in a pre-stressed state is made of a flexible but not extensible material. 4 ) Système de mise en place d'un cotyle expansible selon l'une quelconque des revendications précédentes, caractérisé en ce que l'anse (7) est solidaire du lien (6) en deux points diamétralement opposés et s'étend extérieurement au delà du cotyle (1). 4) System for fitting an expandable acetabulum according to any one of the preceding claims, characterized in that the handle (7) is integral with the link (6) at two diametrically opposite points and extends externally beyond of the acetabulum (1). 5 ) Système de mise en place d'un cotyle expansible selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comporte un mandrin auxiliaire (8) qui se présente à une extrémité (9) sous la forme d'un dôme capable de prendre appui sur la surface interne du cotyle (1) et comporte à son autre extrémité une zone (10) de préhension manuelle. 5) System for fitting an expandable acetabulum according to any one of the preceding claims, characterized in that it comprises an auxiliary mandrel (8) which is present at one end (9) in the form of a dome capable of bearing on the internal surface of the acetabulum (1) and comprises at its other end a zone (10) for manual gripping. 6") ) Système de mise en place d'un cotyle expansible selon la revendication 5, caractérisé en ce que l'extrémité (9) du mandrin (8) en forme de dôme comporte à sa surface supérieure au moins trois picots (14) régulièrement répartis autour du centre de ladite extrémité, de manière à pénétrer naturellement à l'intérieur des ouvertures circulaires (15) formant le fond des saignées (16) séparant chaque pétale. 6 ")) System for fitting an expandable acetabulum according to claim 5, characterized in that the end (9) of the dome-shaped mandrel (8) has at its upper surface at least three pins (14) regularly distributed around the center of said end, so as to penetrate naturally inside the circular openings (15) forming the bottom of the grooves (16) separating each petal. 7 ) Cotyle expansible selon la revendication 1, caractérisé en ce qu'il comporte le moyen de recevoir le lien périphérique (6) capable de maintenir les pétales (2) en état de précontrainte maximale et d'être arraché manuellement en vue de les libérer à l'intérieur de la cavité cotyloidienne. 7) Expandable cup according to claim 1, characterized in that it comprises the means for receiving the peripheral link (6) capable of maintaining the petals (2) in a state of maximum prestressing and of being torn off manually in order to release them inside the acetabulum. 8 ) Cotyle expansible selon la revendication 7, caractérisé en ce que ledit moyen est constitué par la gorge (4) périphérique, extérieure, située à la base du cotyle, sur l'ensemble des pétales (2), en dessous des picots d'ancrage (5) et capable de recevoir le lien (6).  8) expandable acetabulum according to claim 7, characterized in that said means is constituted by the groove (4), external, located at the base of the acetabulum, on all the petals (2), below the pins anchor (5) and capable of receiving the link (6). 9 ) Cotyle expansible selon la revendication 8, caractérisé en ce que la gorge (4) pratiquée à la base de chaque pétale présente en coupe verticale une forme dissymétrique comportant son bord supérieur (12) parallèle au plan de ladite gorge et son bord inférieur (13) incliné vers l'extérieur du cotyle (1).  9) An expandable acetabulum according to claim 8, characterized in that the groove (4) formed at the base of each petal has an asymmetrical shape in vertical section having its upper edge (12) parallel to the plane of said groove and its lower edge ( 13) inclined towards the outside of the cup (1).
FR9112721A 1991-10-14 1991-10-14 System for fitting an expandable acetabulum, and expandable acetabulum provided with such a system Pending FR2682286A1 (en)

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FR9112721A FR2682286A1 (en) 1991-10-14 1991-10-14 System for fitting an expandable acetabulum, and expandable acetabulum provided with such a system

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Cited By (8)

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Publication number Priority date Publication date Assignee Title
FR2710522A1 (en) * 1993-09-30 1995-04-07 Deux C T Hip prosthesis fixed by expansion and by screws or nails
EP0687452A1 (en) * 1994-06-16 1995-12-20 Patrick Marie Croly Labourdette Acetabular cup prosthesis, its use and ancillary instrument for inserting the same
EP0841042A1 (en) * 1996-11-12 1998-05-13 Ppc Set of ancillary instruments for implanting hip prosthesis cups, and ready-to-implant cup prosthetic assembly
EP1181909A1 (en) * 2000-08-21 2002-02-27 Bone & Joint Research S.A. Elastic acetabular anchoring brace for hip acetabular joint insert made of rigid material
FR2834630A1 (en) * 2002-01-17 2003-07-18 Implant Reduction Eurl Cotyloid cup for head of artificial hip joint femoral implant is made from two hemispherical shells, one partly flexible and other rigid
FR2904931A1 (en) * 2006-08-18 2008-02-22 Advanced Technical Fabrication Double mobility acetabulum for reconstituting articulation of hip, has extraction unit, whose notch is provided on surface, where notch is conformed and oriented for engagement and entanglement of end of axial extraction tool of cup
CN108836576A (en) * 2018-07-18 2018-11-20 北京爱康宜诚医疗器材有限公司 replacement prosthesis
CN114288070A (en) * 2021-12-30 2022-04-08 上海交通大学医学院附属第九人民医院 Construction method and device of expansion prosthesis model suitable for acetabular defect repair

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EP0051686A1 (en) * 1980-11-06 1982-05-19 Waldemar Link (GmbH & Co.) Joint endoprosthesis
EP0225819A1 (en) * 1985-10-25 1987-06-16 Etienne Duthoit Acetabular cup for a hip prosthesis without cement
EP0234811A1 (en) * 1986-02-19 1987-09-02 Pfizer Hospital Products Group, Inc. Acetabular cup assembly
FR2650174A1 (en) * 1989-07-26 1991-02-01 Maudhuit Bernard Artificial acetabulum for hip prostheses and system for putting it into position

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FR2416004A1 (en) * 1978-02-01 1979-08-31 Sejourne Pierre Dominique Cementless articular prosthesis component - has metal socket with radial slots expanded by tapered sliding lining
EP0051686A1 (en) * 1980-11-06 1982-05-19 Waldemar Link (GmbH & Co.) Joint endoprosthesis
EP0225819A1 (en) * 1985-10-25 1987-06-16 Etienne Duthoit Acetabular cup for a hip prosthesis without cement
EP0234811A1 (en) * 1986-02-19 1987-09-02 Pfizer Hospital Products Group, Inc. Acetabular cup assembly
FR2650174A1 (en) * 1989-07-26 1991-02-01 Maudhuit Bernard Artificial acetabulum for hip prostheses and system for putting it into position

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2710522A1 (en) * 1993-09-30 1995-04-07 Deux C T Hip prosthesis fixed by expansion and by screws or nails
EP0687452A1 (en) * 1994-06-16 1995-12-20 Patrick Marie Croly Labourdette Acetabular cup prosthesis, its use and ancillary instrument for inserting the same
FR2721201A1 (en) * 1994-06-16 1995-12-22 Labourdette Patrick Marie Crol Cotyloid prosthesis
EP0841042A1 (en) * 1996-11-12 1998-05-13 Ppc Set of ancillary instruments for implanting hip prosthesis cups, and ready-to-implant cup prosthetic assembly
FR2755603A1 (en) * 1996-11-12 1998-05-15 Jacques Preaut ASSEMBLY OF ANCILLARS FOR LAYING HIP PROSTHESIS COTYLS, AND READY-TO-FIT COTYL PROSTHETIC ASSEMBLY
US5976148A (en) * 1996-11-12 1999-11-02 Ppc Set of ancillary equipment for the implantation of acetabular cups of hip prosthesis, and prosthetic acetabular cup assembly ready to be implanted
EP1181909A1 (en) * 2000-08-21 2002-02-27 Bone & Joint Research S.A. Elastic acetabular anchoring brace for hip acetabular joint insert made of rigid material
FR2834630A1 (en) * 2002-01-17 2003-07-18 Implant Reduction Eurl Cotyloid cup for head of artificial hip joint femoral implant is made from two hemispherical shells, one partly flexible and other rigid
FR2904931A1 (en) * 2006-08-18 2008-02-22 Advanced Technical Fabrication Double mobility acetabulum for reconstituting articulation of hip, has extraction unit, whose notch is provided on surface, where notch is conformed and oriented for engagement and entanglement of end of axial extraction tool of cup
CN108836576A (en) * 2018-07-18 2018-11-20 北京爱康宜诚医疗器材有限公司 replacement prosthesis
CN114288070A (en) * 2021-12-30 2022-04-08 上海交通大学医学院附属第九人民医院 Construction method and device of expansion prosthesis model suitable for acetabular defect repair

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