FR2770764A1 - Bone fixing screw for surgery - Google Patents

Bone fixing screw for surgery Download PDF

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Publication number
FR2770764A1
FR2770764A1 FR9714258A FR9714258A FR2770764A1 FR 2770764 A1 FR2770764 A1 FR 2770764A1 FR 9714258 A FR9714258 A FR 9714258A FR 9714258 A FR9714258 A FR 9714258A FR 2770764 A1 FR2770764 A1 FR 2770764A1
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France
Prior art keywords
dowel according
head
thread
slot
ankle
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Granted
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FR9714258A
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French (fr)
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FR2770764B1 (en
Inventor
Christian Sartorius
Jean Jacques Martin
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Fixano SA
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Fixano SA
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Priority to FR9714258A priority Critical patent/FR2770764B1/en
Publication of FR2770764A1 publication Critical patent/FR2770764A1/en
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Publication of FR2770764B1 publication Critical patent/FR2770764B1/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8625—Shanks, i.e. parts contacting bone tissue
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • A61B2017/0403—Dowels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • A61B2017/0438—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors slotted, i.e. having a longitudinal slot for enhancing their elasticity
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • A61B2017/044—Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors with a threaded shaft, e.g. screws
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/08—Muscles; Tendons; Ligaments
    • A61F2/0811—Fixation devices for tendons or ligaments
    • A61F2002/0876—Position of anchor in respect to the bone
    • A61F2002/0882—Anchor in or on top of a bone tunnel, i.e. a hole running through the entire bone

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Surgery (AREA)
  • Rheumatology (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Rehabilitation Therapy (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

The screw has a body (3) with projections (4) shaped to grip the bone and a head (5) on which an impaction force is exerted. The projections form a thread with the front face inclined towards the longitudinal axis and the rear face perpendicular to it. The faces define an edge (7) between them

Description

La présente invention concerne une cheville permettant la fixation d'un objet à un os, en particulier un fil de suture, par exemple en vue de la réinsertion d'un ligament rompu, ou un ligament artificiel. The present invention relates to an ankle allowing the attachment of an object to a bone, in particular a suture, for example for the reinsertion of a ruptured ligament, or an artificial ligament.

I1 est connu de fixer un fil de suture à un os au moyen d'un dispositif comprenant un ou plusieurs organes déployables. Un tunnel est aménagé au travers de la corticale et le dispositif est impacté dans ce tunnel jusqu'à ce que son ou ses organes déployables prennent appui dans l'os spongieux et assurent une rétention solide du dispositif. I1 is known to fix a suture to a bone by means of a device comprising one or more deployable organs. A tunnel is arranged through the cortex and the device is impacted in this tunnel until its deployable organ (s) are supported in the cancellous bone and ensure solid retention of the device.

Ce type de dispositif a toutefois pour inconvénient important d'être mis en place de manière irréversible dans l'os, ce qui interdit toute erreur ou fausse manoeuvre au cours de cette mise en place. However, this type of device has the significant disadvantage of being placed in an irreversible manner in the bone, which prohibits any error or false operation during this positioning.

Une erreur ou une fausse manoeuvre ne pouvant jamais être totalement exclue, cette irréversibilité n'est guère souhaitable. Since an error or a false maneuver can never be totally excluded, this irreversibility is hardly desirable.

La présente invention vise à remédier à cet inconvénient pratique essentiel. The present invention aims to remedy this essential practical drawback.

La cheville qu'elle concerne, destinée à être mise en place par impaction, comprend un corps muni de parties saillantes conformées pour prendre appui dans l'os et une tête sur laquelle la force d'impaction peut être exercée. The ankle which it concerns, intended to be put in place by impaction, comprises a body provided with protruding parts shaped to bear against the bone and a head on which the force of impaction can be exerted.

Selon l'invention, ces parties saillantes forment un filet dont la face antérieure est inclinée par rapport à l'axe longitudinal de la cheville et dont la face postérieure est sensiblement perpendiculaire à l'axe longitudinal de la cheville, ces faces antérieure et postérieure délimitant entre elles une arête vive. According to the invention, these projecting parts form a thread whose front face is inclined relative to the longitudinal axis of the ankle and whose rear face is substantially perpendicular to the longitudinal axis of the ankle, these front and rear faces delimiting between them a sharp edge.

Ladite face antérieure (par rapport à la direction d'impaction) permet une prise d'appui progressive des spires de ce filet dans la paroi osseuse au cours de l'impaction, et ladite face postérieure permet d'assurer le verrouillage anti-retour de cette cheville.  Said anterior face (relative to the direction of impaction) allows a progressive support taking of the turns of this thread in the bone wall during the impaction, and said posterior face makes it possible to ensure the non-return locking of that ankle.

La cheville selon l'invention peut ainsi être mise en place par impaction, en prenant parfaitement appui contre la paroi osseuse, tout en pouvant être dévissée une fois mise en place, dans le cas où cette mise en place ne serait pas satisfaisante. The ankle according to the invention can thus be put in place by impaction, by perfectly resting against the bone wall, while being able to be unscrewed once put in place, in the event that this putting in is not satisfactory.

Les parties saillantes peuvent avoir une hauteur constante au long du corps de la cheville, ou une hauteur qui augmente depuis l'extrémité distale de ce corps vers l'extrémité proximale de celui-ci. The protrusions may have a constant height along the body of the ankle, or a height which increases from the distal end of this body towards the proximal end thereof.

Cette augmentation de hauteur favorise l'ancrage de la cheville dans l'os, par effet de coin. This increase in height favors the anchoring of the ankle in the bone, by wedge effect.

De préférence, la cheville comprend une fente longitudinale débouchant sur deux de ses côtés latéraux opposés, cette fente s'étendant depuis l'extrémité distale de cette cheville jusqu'à sensiblement la base de la tête de celle-ci. Preferably, the dowel comprises a longitudinal slit opening onto two of its opposite lateral sides, this slit extending from the distal end of this dowel to substantially the base of the head thereof.

Cette fente permet de conférer une certaine élasticité radiale à la cheville, ce qui permet d'effacer les spires du filet lors de l'impaction puis d'assurer la prise d'appui de ces spires dans l'os spongieux, par rappel élastique. This slot makes it possible to impart a certain radial elasticity to the ankle, which makes it possible to erase the turns of the net during the impaction and then to ensure the support of these turns in the cancellous bone, by elastic return.

La fente présente avantageusement une largeur telle que le fil de suture puisse être engagé en elle, de sorte qu'après mise en place de la cheville, le fil dépasse de la paroi osseuse de part et d'autre de la tête. The slot advantageously has a width such that the suture thread can be engaged in it, so that after the ankle has been placed, the thread protrudes from the bone wall on either side of the head.

La fente peut avoir une largeur constante ou une largeur qui varie au long du corps de la cheville. The slit may have a constant width or a width which varies along the body of the ankle.

La tête de la cheville peut comprendre une gorge dans laquelle un fil de suture peut être engagé et maintenu par nouage, ou dans laquelle un anneau relié à un tel fil ou à l'objet à fixer peut être engagé et maintenu, notamment par encliquetage. The head of the ankle may include a groove in which a suture thread can be engaged and held by knotting, or in which a ring connected to such a thread or to the object to be fixed can be engaged and maintained, in particular by snap-fastening.

La tête de la cheville peut comprendre au moins une fente latérale pour le passage d'un fil de suture le long d'elle-même.  The head of the ankle may include at least one lateral slit for the passage of a suture along itself.

En outre, cette tête présente une face proximale bombée, pour présenter un profil "mousse", non agressif pour les tissus environnants. In addition, this head has a convex proximal face, to present a "foam" profile, non-aggressive for the surrounding tissues.

De préférence, la tête a une forme générale conique, présentant également un filet conformé de la même manière que le filet du corps. Preferably, the head has a generally conical shape, also having a thread shaped in the same way as the body thread.

Ce filet contribue à la rétention de la cheville dans l'os, et la forme conique de la tête permet un parfait verrouillage de la cheville, par coincement. This net contributes to the retention of the ankle in the bone, and the conical shape of the head allows a perfect locking of the ankle, by wedging.

De préférence, la face antérieure du filet que comprend ladite tête forme, avec l'axe longitudinal de la cheville, un angle supérieur à celui que forment la face antérieure du filet que comprend le corps de la cheville et ce même axe longitudinal. Preferably, the front face of the thread that comprises said head forms, with the longitudinal axis of the dowel, an angle greater than that formed by the front face of the thread that comprises the body of the dowel and this same longitudinal axis.

Selon une forme de réalisation préférée de l'invention, l'angle que forme ladite face antérieure du filet aménagé au niveau de la tête de la cheville par rapport à l'axe longitudinal de cette cheville est de l'ordre de 30 , tandis que l'angle que forme ladite face antérieure du filet aménagé au niveau du corps de la cheville avec ce même axe longitudinal est de l'ordre de 200. According to a preferred embodiment of the invention, the angle formed by said front face of the net arranged at the head of the dowel relative to the longitudinal axis of this dowel is of the order of 30, while the angle formed by said front face of the thread arranged at the level of the body of the ankle with this same longitudinal axis is of the order of 200.

De préférence, l'extrémité distale de la cheville présente une partie de forme conique dont l'angle au sommet est de l'ordre de 200. Preferably, the distal end of the ankle has a conical part whose angle at the apex is of the order of 200.

Pour sa bonne compréhension, l'invention est à nouveau décrite ci-dessous en référence au dessin schématique annexé représentant, à titre d'exemples non limitatifs, deux formes de réalisation possibles de la cheville qu'elle concerne. For a good understanding, the invention is again described below with reference to the appended diagrammatic drawing representing, by way of nonlimiting examples, two possible embodiments of the pin it relates to.

La figure 1 en est une vue latérale, selon une première forme de réalisation
la figure 2 en est une vue en bout, du côté de sa tête
la figure 3 en est une vue latérale, après implantation, et
la figure 4 en est une vue latérale, selon une deuxième forme de réalisation.Figure 1 is a side view, according to a first embodiment
Figure 2 is an end view, from the side of his head
FIG. 3 is a side view thereof, after implantation, and
Figure 4 is a side view, according to a second embodiment.

Par simplification, les parties identiques ou équivalentes dans ces deux formes de réalisation sont désignées par les mêmes références numériques. For simplicity, the identical or equivalent parts in these two embodiments are designated by the same reference numerals.

La figure 1 représente un cheville 2 permettant la fixation d'un fil de suture à un os, notamment en vue de la réinsertion sur l'os d'un ligament rompu, ou la fixation d'un ligament artificiel lui-même. FIG. 1 represents an ankle 2 allowing the fixing of a suture thread to a bone, in particular for the purpose of reinsertion on the bone of a ruptured ligament, or the fixing of an artificial ligament itself.

Cette cheville 2 comprend un corps 3 pourvu d'un filet 4 et une tête 5 comprenant une cavité axiale triangulaire 6. This pin 2 comprises a body 3 provided with a thread 4 and a head 5 comprising a triangular axial cavity 6.

La face antérieure 4a (par rapport à la direction d'introduction de la cheville dans lots) du filet 4 est inclinée par rapport à l'axe longitudinal de la cheville, selon un angle de l'ordre de 20O tandis que la face postérieure 4b de ce filet 4 est sensiblement perpendiculaire à l'axe longitudinal de la cheville 2, et ces faces 4a et 4b délimitent entre elles une arête vive 7. The anterior face 4a (relative to the direction of introduction of the dowel in batches) of the net 4 is inclined relative to the longitudinal axis of the dowel, at an angle of the order of 20O while the rear face 4b of this thread 4 is substantially perpendicular to the longitudinal axis of the pin 2, and these faces 4a and 4b define between them a sharp edge 7.

Le pas du filet 4 est de l'ordre de 1 mm et sa hauteur est de l'ordre de 0,4 mm, pour une cheville 2 ayant une longueur de l'ordre de 13 mm. The pitch of the thread 4 is of the order of 1 mm and its height is of the order of 0.4 mm, for a dowel 2 having a length of the order of 13 mm.

La cheville 2 comprend également une fente longitudinale 8 dont la largeur est de 0,3 mm. Cette fente 8 débouche sur deux des côtés latéraux opposés de la cheville 2 et s'étend depuis l'extrémité distale du corps 3 jusqu'à sensiblement la base de la tête 5. The pin 2 also includes a longitudinal slot 8 whose width is 0.3 mm. This slot 8 opens onto two of the opposite lateral sides of the ankle 2 and extends from the distal end of the body 3 to substantially the base of the head 5.

Cette dernière est de forme générale conique. Elle présente un filet 10 conformé de la même manière que le filet 4, sinon que la face antérieure îOa de ce filet 10 forme un angle de l'ordre de 30O avec l'axe longitudinal de la cheville 2. Le pas de ce filet 10 est de l'ordre de 1 mm et sa hauteur est de l'ordre de 0,3 mm.  The latter is generally conical in shape. It has a thread 10 shaped in the same way as the thread 4, except that the front face îOa of this thread 10 forms an angle of the order of 30O with the longitudinal axis of the pin 2. The pitch of this thread 10 is of the order of 1 mm and its height is of the order of 0.3 mm.

L'extrémité distale de la cheville 2 présente une partie 11 de forme conique dont l'angle au sommet est de l'ordre de 20 .  The distal end of the pin 2 has a part 11 of conical shape whose angle at the top is of the order of 20.

La cheville 2 est destinée à être mise en place par impaction dans un tunnel 15 préalablement aménagé au travers de la corticale 16. The pin 2 is intended to be placed by impaction in a tunnel 15 previously arranged through the cortex 16.

Après aménagement de ce tunnel 15, le fil de suture 17 est engagé dans la fente 8 puis la cheville 2 est impactée dans le tunnel 15 jusqu'à ce que les spires de ses filets 4 et 10 prennent appui progressivement dans l'os spongieux et assurent une rétention solide de la cheville 2. After fitting out this tunnel 15, the suture thread 17 is engaged in the slot 8 then the ankle 2 is impacted in the tunnel 15 until the turns of its threads 4 and 10 are gradually supported in the cancellous bone and ensure solid retention of the ankle 2.

La fente 8, outre le montage du fil 15, permet de conférer une certaine élasticité radiale à la cheville 2, ce qui permet d'effacer les spires du filet 4 lors de l'impaction puis d'assurer la prise d'appui de ces spires dans l'os spongieux, par rappel élastique. The slot 8, in addition to the mounting of the wire 15, makes it possible to confer a certain radial elasticity on the pin 2, which makes it possible to erase the turns of the net 4 during the impaction and then to ensure the taking of support of these turns in the cancellous bone, by elastic recall.

Le filet 10 contribue à la rétention de la cheville dans l'os, et la forme conique de la tête 5 permet un parfait verrouillage de la cheville 2, par coincement. The net 10 contributes to the retention of the ankle in the bone, and the conical shape of the head 5 allows perfect locking of the ankle 2, by wedging.

Grâce aux filets 4 et 10, la cheville 2 peut être dévissée au moyen d'une clé appropriée engagée dans la cavité 6, dans le cas où la mise en place réalisée ne serait pas satisfaisante. Thanks to the threads 4 and 10, the dowel 2 can be unscrewed by means of an appropriate key engaged in the cavity 6, in the event that the installation carried out is not satisfactory.

La figure 4 montre une cheville 2 dans laquelle le filet 4 a une hauteur qui augmente depuis l'extrémité distale du corps 3 vers l'extrémité proximale de celui-ci, et la fente 8 a une largeur qui augmente également depuis cette même extrémité distale vers cette même extrémité proximale. FIG. 4 shows a pin 2 in which the thread 4 has a height which increases from the distal end of the body 3 towards the proximal end thereof, and the slot 8 has a width which also increases from this same distal end toward this same proximal end.

Ces augmentations de hauteur favorisent l'ancrage de la cheville 2, par effet de coin. These height increases promote anchoring of the ankle 2, by wedge effect.

En outre, la tête 5 présente une gorge 20 dans laquelle un anneau (non représenté), relié à un fil de suture, peut être encliqueté pour assurer le montage de ce fil sur la cheville.  In addition, the head 5 has a groove 20 in which a ring (not shown), connected to a suture thread, can be snapped to ensure the mounting of this thread on the ankle.

Claims (11)

REVENDICATIONS 1 - Cheville de fixation d'un objet à un os, en particulier un fil de suture, par exemple en vue de la réinsertion d'un ligament rompu, ou un ligament artificiel, destinée à être mise en place par impaction et comprenant, à cet effet, un corps (3) muni de parties saillantes (4) conformées pour prendre appui dans l'os et une tête (5) sur laquelle la force d'impaction peut être exercée, cheville (2) caractérisée en ce que ses parties saillantes forment un filet (4) dont la face antérieure (4a) est inclinée par rapport à son axe longitudinal et dont la face postérieure (4b) est sensiblement perpendiculaire à cet axe longitudinal, ces faces antérieure (4a) et postérieure (4b) délimitant entre elles une arête vive (7). 1 - Anchor for fixing an object to a bone, in particular a suture, for example for the reinsertion of a ruptured ligament, or an artificial ligament, intended to be placed by impaction and comprising, for this purpose, a body (3) provided with projecting parts (4) shaped to bear against the bone and a head (5) on which the impaction force can be exerted, ankle (2) characterized in that its parts protruding form a net (4) whose anterior face (4a) is inclined relative to its longitudinal axis and whose posterior face (4b) is substantially perpendicular to this longitudinal axis, these anterior (4a) and posterior (4b) faces delimiting between them a sharp edge (7). 2 - Cheville selon la revendication 1, caractérisée en ce que les parties saillantes (4) ont une hauteur constante au long du corps (3). 2 - dowel according to claim 1, characterized in that the projecting parts (4) have a constant height along the body (3). 3 - Cheville selon la revendication 1, caractérisée en ce que les parties saillantes (4) ont une hauteur qui augmente depuis l'extrémité distale du corps (3) vers l'extrémité proximale de celui-ci. 3 - dowel according to claim 1, characterized in that the projecting parts (4) have a height which increases from the distal end of the body (3) towards the proximal end thereof. 4 - Cheville selon l'une des revendications 1 à 3, caractérisée en ce qu'elle comprend une fente longitudinale (8) débouchant sur deux de ses côtés latéraux opposés, cette fente (8) s'étendant depuis l'extrémité distale de cette cheville (2) jusqu'à sensiblement la base de la tête (5). 4 - Dowel according to one of claims 1 to 3, characterized in that it comprises a longitudinal slot (8) opening onto two of its opposite lateral sides, this slot (8) extending from the distal end of this ankle (2) to substantially the base of the head (5). 5 - Cheville selon la revendication 4, caractérisée en ce que la fente (8) présente une largeur telle que le fil de suture (17) ou le ligament artificiel puisse être engagé en elle. 5 - dowel according to claim 4, characterized in that the slot (8) has a width such that the suture (17) or the artificial ligament can be engaged in it. 6 - Cheville selon la revendication 4 ou la revendication 5, caractérisée en ce que la fente (8) a une largeur constante.  6 - dowel according to claim 4 or claim 5, characterized in that the slot (8) has a constant width. 7 - Cheville selon la revendication 4 ou la revendication 5, caractérisée en ce que la fente (8) a une largeur qui varie au long du corps (3). 7 - dowel according to claim 4 or claim 5, characterized in that the slot (8) has a width which varies along the body (3). 8 - Cheville selon l'une des revendications 1 à 7, caractérisée en ce que sa tête (5) comprend une gorge (20) dans laquelle un fil de suture peut être engagé et maintenu par nouage, ou dans laquelle un anneau relié à un tel fil ou à l'objet à fixer peut être engagé et maintenu, notamment par encliquetage. 8 - Dowel according to one of claims 1 to 7, characterized in that its head (5) comprises a groove (20) in which a suture thread can be engaged and held by knotting, or in which a ring connected to a such a wire or the object to be fixed can be engaged and maintained, in particular by snap-fastening. 9 - Cheville selon l'une des revendications 1 à 8, caractérisée en ce que sa tête (5) a une forme générale conique, présentant également un filet (10) conformé de la même manière que le filet (4) du corps (3). 9 - dowel according to one of claims 1 to 8, characterized in that its head (5) has a generally conical shape, also having a thread (10) shaped in the same way as the thread (4) of the body (3 ). 10 - Cheville selon la revendication 9, caractérisée en ce que la face antérieure (10a) du filet (10) que comprend ladite tête (5) forme, avec l'axe longitudinal de la cheville (2), un angle supérieur à celui que forment la face antérieure (4a) du filet (4) que comprend le corps (3) de la cheville (2) et ce même axe longitudinal. 10 - dowel according to claim 9, characterized in that the front face (10a) of the net (10) that comprises said head (5) forms, with the longitudinal axis of the dowel (2), an angle greater than that form the anterior face (4a) of the thread (4) that includes the body (3) of the pin (2) and this same longitudinal axis. 11 - Cheville selon l'une des revendications 1 à 10, caractérisée en ce que son extrémité distale présente une partie (11) de forme conique dont l'angle au sommet est de l'ordre de 20 .  11 - Dowel according to one of claims 1 to 10, characterized in that its distal end has a part (11) of conical shape whose angle at the top is of the order of 20.
FR9714258A 1997-11-07 1997-11-07 ANKLE FOR FIXING A SUTURE THREAD OR AN ARTIFICIAL LIGAMENT TO A BONE Expired - Fee Related FR2770764B1 (en)

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