FR2731610A1 - Anchor component for implantation in bone surface cavity - Google Patents

Anchor component for implantation in bone surface cavity Download PDF

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Publication number
FR2731610A1
FR2731610A1 FR9503306A FR9503306A FR2731610A1 FR 2731610 A1 FR2731610 A1 FR 2731610A1 FR 9503306 A FR9503306 A FR 9503306A FR 9503306 A FR9503306 A FR 9503306A FR 2731610 A1 FR2731610 A1 FR 2731610A1
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France
Prior art keywords
anchor
head
ia
part
bone cavity
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Granted
Application number
FR9503306A
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French (fr)
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FR2731610B1 (en
Inventor
Didier Fromentin
Christian Augagneur
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AMP DEVELOPPEMENT
AMP DEV
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AMP DEVELOPPEMENT
AMP DEV
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Priority to FR9503306A priority Critical patent/FR2731610B1/en
Publication of FR2731610A1 publication Critical patent/FR2731610A1/en
Application granted granted Critical
Publication of FR2731610B1 publication Critical patent/FR2731610B1/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • A61B2017/0409Instruments for applying suture anchors
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/04Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
    • A61B17/0401Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors
    • A61B2017/0414Suture anchors, buttons or pledgets, i.e. means for attaching sutures to bone, cartilage or soft tissue; Instruments for applying or removing suture anchors having a suture-receiving opening, e.g. lateral opening
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/03Automatic limiting or abutting means, e.g. for safety
    • A61B2090/037Automatic limiting or abutting means, e.g. for safety with a frangible part, e.g. by reduced diameter
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2/00Filters 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
    • A61F2/02Prostheses implantable into the body
    • A61F2/30Joints
    • A61F2002/30001Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/3006Properties of materials and coating materials
    • A61F2002/30092Properties of materials and coating materials using shape memory or superelastic materials, e.g. nitinol
    • A61F2002/30093Properties of materials and coating materials using shape memory or superelastic materials, e.g. nitinol operated at only one temperature whilst inside or touching the human body, e.g. constrained in a non-operative shape during surgery, another temperature only occurring before the operation
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61FFILTERS 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
    • A61F2210/00Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2210/0014Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol
    • A61F2210/0019Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof using shape memory or superelastic materials, e.g. nitinol operated at only one temperature whilst inside or touching the human body, e.g. constrained in a non-operative shape during surgery, another temperature only occurring before the operation

Abstract

A cylindrical body (15) is formed with a number of peripheral cut-out portions defining projecting fins (11). A cylindrical head (12) is attached or formed at the upper end of the body, with a diametral hole (120) which communicates with the exterior of the head by means of a lateral slot (121). The slot opens at the lower edge (130) of the head. The assembly is made of a material with shape-memory properties, and cooperates with other components, e.g. a shaft or pin which slides through the slot to engage in the diametral hole, which may then be heated to cause locking of the shaft within the head.

Description

La présente invention a pour objet une ancre destinée à être insérée dans une cavité osseuse, et le dispositif d'insertion de ladite ancre dans une telle cavité. The present invention relates to an anchor for insertion into a bone cavity, and the insertion of said anchor device in such a cavity.

Le corps humain comporte des parties molles, notamment des muscles, qui sont rattacnees au squelette osseux par l'intermédiaire d'un tissu, généralement fibreux, formant par exempie les tendons ou ies aponévroses, tandis que les parties osseuses sont souvent -eilees entre elles par des ligaments, capsuies ou autres. The human body comprises soft tissues, including muscles, which are rattacnees the bony skeleton via a tissue, usually fibrous, thereby forming exampIe tendons or aponeuroses ies, while bone parts often -eilees therebetween by ligaments, or other capsuies.

Pour des raisons traumatiques ou accidentelles, ou iors d'un acte chirurgical, ces parties molles peuvent être détachées de leur support osseux et pour les rattacher à i'os on utilise ie plus souvent des fils de suture ou des fils d'acier qui sont flxés à i'os au moyen de vis, d' agrafes, d' ancres ou autres moyens de fixation. For traumatic or accidental reasons, or IORS a surgical procedure, the soft parts can be detached from their bony support and attach them to i'os is used ie mostly son of suture or wire son are flxés to i'os by means of screws, staples, of anchors or other fixing means.

Les ancres connues à ce jour sont vissées ou insérées par impactage, à la manière d un ciou, dans une cavité préalablement pratiquée dans l'os, et s ancrent dans ladite cavité par i intermédiaire d'ailettes qui sont repliées contre le corps de ancre avant son introduction dans ladite cavité, et qui se déploient ensuite à la manière d'un parapluie, soit par élasticité, soit par traction sur un cordon qui leur est fixé. Anchors known to date are screwed or inserted by impaction in the manner of a ciou, in a previously formed in the bone cavity, and s anchored in said cavity by means of i fins which are folded against the anchor body prior to its introduction into said cavity, and then deployed in the manner of an umbrella, is elastically or by pulling on a cord which is attached to them.

Toutefois, en raison des petites dimensions de ces pièces, les ancres connues sont généralement commercialisées avec un fil de suture qui leur est fixé en cours de fabrication, de sorte que ie chirurgien n'a plus le cnoix du fil une fois le modèle d'ancre choisi. However, due to the small size of these rooms, known anchors are usually sold with a suture that is attached to them during manufacture, so that I no longer surgeon cnoix the wire once the model selected anchor. Il s'ensuit parfois que ie fil n est pas adapté à ia contrainte à laquelle il est soumis et casse. It follows that sometimes ie wire is not suitable for ia stress to which it is subject and breaks. ù autre part chaque chirurgien a ses propres habitudes en matière de fil, qu'li choisit notamment en onction ae son matériau et de son diamètre. ù other each surgeon has his own habits wire qu'li chooses including anointing ae its material and diameter.

La présente invention a pour but de remédier aux divers inconvénients des dispositifs connus en proposant d'une part une ancre, fabriquée de préférence# dans un matériau à mémoire de forme qui laisse au chirurgien le choix du fil de suture, q I peut ixer à ladite ancre au moment de son insertion dans la cavité osseuse, et d'autre part le dispositif d insertion de ladite ancre. The present invention aims to overcome the various drawbacks of known devices by providing firstly an anchor, preferably manufactured in a # shape memory material which allows the surgeon the choice of suture, q I can to ixer said anchor during its insertion into the bone cavity, and on the other hand the device for insertion of said anchor.

On salut qu un atriau a mémoire de forme est un matériau, le plus souvent à base de titane et de nickel, et qui possède la propriété c erre malléable à basse température, généralement au voisinage de 0^C, et de retrouver sa forme initiale. It hi that a atriau shape memory is a material, usually based on titanium and nickel, and which possesses the property c wanders malleable at low temperature, generally in the vicinity of 0 ^ C, and recover its initial shape . enregistrée dans ia mémoire moléculaire du matériau, lorsque la température s'élève, et notamment lorsqu'elle atteint approximativement la température du corps humain, soi= 37-C. recorded in ia molecular memory of the material, when the temperature rises, and in particular when it reaches approximately the body temperature, self-C = 37.

Une ancre selon @ invention se caractérise essentiellement en ce qu elle comprend un corps de forme globalement cylindrique à la périphérie duquel sont découpées longitudinalement des ailettes solidarisées par leur extrémité inférieure audit corps, lequel est surmonté d'une tête de forme cylindrique dans laquelle est pratiqué diamétralement un évidement de forme sensiblement cylindrique proiongé par une fente cul s étend jusqu'au voisinage du bord inférieur de ladite tête. An anchor according to @ invention is essentially characterized in that it comprises a generally cylindrical shaped body to the periphery of which are cut longitudinally of the vanes joined together by their lower end to said body, which is surmounted by a cylindrical head in which is practiced diametrically a substantially cylindrical recess proiongé by ass s slot extends to the vicinity of the lower edge of said head.

La fente ménagee dans la tête de l'ancre selon l'invention peut avantageusement être munie en bordure d'une ianguette anti-retour empêchant un fiL inséré par ladite fente dans l'évidement cylindrique d'en ressortir. The slit formed in the head of the anchor according to the invention may advantageously be provided along a non-return ianguette prevent a wire inserted through said slot into the cylindrical recess to emerge.

Le dispositif selon 1 invention d'insertion de 1 ancre est, dans un premier mode de réalisation, constitué de deux pièces de forme allongée dont la première coulisse dans la deuxième à son extrémité inférieure ouverte, de manière à laisser passer hors de ladite deuxième pièce l'extrémite de ladite première pièce coulissante pour lui permettre de venir, sensiblement perpendiculairement, au contact de ia tace supérieure de @a tête de i ancre en vue de la pousser dans une cavite pratiquée dans un corps osseux, 1 ancre etant préalablement logée dans une pièce de logement qui est solidarisée par P une de ses extrémités à l'extrémité de ia première pièce allongee et dans laquelle est pratiquée une découpe, complémentaire de celle pratiquée dans la tête de i ancre, qui vient en regard de cette dernière lorsque ladite ancre est positionée dans ladite pièce de logement. The device according to one invention insertion of anchor 1 is in a first embodiment, consisting of two elongated parts with the first slider in the second at its lower open end so as to pass out of said second part the end of said first slider to allow it to come substantially perpendicularly in contact with upper ia tace of @a i anchor head in order to push it into a cavity formed in a bone body, one anchor being housed previously in a housing part which is secured in P one of its ends to the end of elongated ia first part and in which is practiced a cutout, complementary to that provided in the head i anchor, which comes opposite the latter when said positionée anchor is in said housing part.

Par a découpe ménagée dans la pièce de logement l'utilisateur peut passer un fil de suture et ie loger dans l'évidement de la tette de 1 ancre, où ii peut être bloqué par une languette anti-retour By a cutout made in the user receiving part can pass a suture and ie housed in the recess of the teat 1 anchor, where ii may be blocked by a non-return tab
Dans un second mode de réalisation, le dispositif d'insertion de 1 ancre est constitué d une tige- support dont une des extrémités est rétréc@e et solidarisée à la face supérieure ce a tête de 1 ancre de manière que la zone d attache puisse se rompre sous i effet c une torsion ou d'une flexion de ladite tige-support, une fois l'ancre mise en place dans ia cavité osseuse. In a second embodiment, the insertion device 1 anchor consists of a rod-support whose one end is rétréc @ e and secured to the upper face of this head has one anchor such that the attachment area of ​​can break under effect i c a torsion or a bending of said carrier rod, once the anchor inserted into ia bone cavity.

Les avantages et les caractéristiques de la présente invention ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, étant entendu que cette description ne présente aucun caractère limitatif vis à vis de i invention. The advantages and features of the present invention will become apparent from the following description which refers to the accompanying drawings, it being understood that this description is not limiting character with respect to i invention.

Dans le dessin annexé In the accompanying drawing
- la figure 1 représente une vue en perspective d'une ancre selon @ invention dont les ailettes sont déployés. - Figure 1 shows a perspective view of an anchor according @ invention, the fins are deployed.

- la figure la représente une vue en plan d'une ancre selon l'invention dont ies ailettes sont repliées. - Figure la shows a plan view of an anchor according to the invention, fins are folded ies.

- ia figure 1b représente une vue en plan d'une ancre selon l'invention dont les ailettes sont déployées. - ia 1b shows a plan view of an anchor according to the invention, the fins are deployed.

- la figure lc représente une vue en plan de la tête de l'ancre selon un deuxième mode de réalisation de 1 invention. - Figure lc is a plan view of the head of the anchor according to a second embodiment of one invention.

- La figure c represente une vue en pian de la tête de la même ancre und fois le fil introduit dans 1 évidement et bloqué par la languette anti-retour. - Figure C is a plan view of the head of the anchor und times the thread introduced in one recess and blocked by the non-return tab.

- la figure a représente une vue en plan des deux parties du dispositif d'insertion selon l'invention. - the figure shows a plan view of the two portions of the insertion device of the invention.

- la figure 2b représente une vue en plan et en coupe partielle d'une pièce de manoeuvre de i élément coulissant du meme dispositif d insertion. - Figure 2b shows a plan and partial sectional view of a i actuating piece slide member of the same insertion device.

- la figure 3 représente une vue en coupe axiale de la pièce de logement du même dispositif d'insertion. - Figure 3 shows an axial sectional view of the receiving part of the same insertion device.

- les figures 4a et 4b représentent une vue en plan et en coupe partielle du même dispositif d'insertion en cours de manoeuvre. - Figures 4a and 4b show a plan view and partial sectional view of the same insertion device during operation.

- ia figure 5 représente une vue en plan d'un second mode de réalisation d dispositif d'insertion de i'ancre selon l'invention. - ia Figure 5 shows a plan view of a second embodiment of insertion of the anchor device according to the invention.

Si on se réfère aux figures @, la et 1b on peut voir qu une ancre 1, reaiisée dans un matériau à mémoire de forme, présente un corps glczalemenl cylindrique 15, dans lequel sont découpées longitudinalement quatre ailettes d'accrochage 11, diamétralement opposées deux à deux, pliées transversalement, sensiblement en leur milieu, vers l'extérieur, permettant le blocage de l'ancre 1 dans une cavité osseuse lorsqu'elles sont dépliées comme on peut le voir sur les figures i er 1b. Referring to FIGS @, la and 1b it can be seen that an anchor 1, reaiisée from a shape memory material, has a cylindrical glczalemenl body 15, from which are cut longitudinally four hooking fins 11, two diametrically opposite two, transversely folded, substantially in their middle, outwardly, allowing the blocking of the anchor 1 into a bone cavity in the unfolded state as shown in figures 1b ist.

Les ailettes 1 sont solidarisées par leur base 10 au corps 15 de l'ancre 1, lequei est surmonté d'une tête 12 de forme cylindrique traversée diamétralement par un évidement 120 de section semi-circulaire, prolongé sur toute sa iongueur par une rente 121 qui s étend jusqu'au bord inférieur 130, 1 évidement i2û etant destiné à recevoir un cordon ou ligament artificiel. The fins 1 are fixed by their base 10 to the body 15 of the anchor 1, lequei is surmounted by a head 12 of cylindrical shape diametrically traversed by a recess 120 of semi-circular section, extended over its entire Iength by a pension 121 that stretches to the lower edge 130, 1 i2u recess being for receiving a cord or artificial ligament.

On peut voir également sur les figures la et lb que ia fente 121 de la tête 12 comporte une languette flexible 121, solidarisée par une de ses extrémités au bord inférieur 130. Ia and Ib can be seen also in Figures ia that slot 121 of the head 12 comprises a flexible tongue 121 made integral by one of its ends to the lower edge 130.

Si on se réfère maintenant aux figures lc et ld on peut voir que ia languette 121 permet de laisser passer un fil de suture X en vue ce son introduction dans l'évidement 120 en se pliant contre la face inférieure de la fente 121 mais empêche ensuite le il / de ressortir de la tète 12, comme on peut le voir sur la figure 1d. If reference is now made to Figures lc and ld can be seen that ia tab 121 allows to pass a suture X for the introduction into the recess 120 by folding against the underside of the slot 121 but then prevents the he / out of the head 12, as can be seen in Figure 1d.

Si on se réfère maintenant à la figure 2a on peut voir qu un dispositif d insertion selon l'invention comprend deux pièces 2 et 3 de forme tubulaire, la pièce 2 étant apte à coulisser dans un alésage 30 pratiqué axialement dans la pièce 3, qui est munie à son extrémité supérieure d'une poignée 3i. Referring now to Figure 2a it can be seen that an insertion device according to the invention comprises two parts 2 and 3 of tubular shape, the part 2 being slidable in a bore 30 axially practiced in the room 3, which is provided at its upper end with a handle 3i.

La pièce coulissante 2 est constitué d'une tige cylindrique 20 au centre de laquelle est pratiqué un orifice transversal 200 destiné à recevoir le téton 210 d'une pièce de manoeuvre 21, représentée sur la figure 2b, apte à coulisser dans une découpe 32 de type à baïonnette pratiquée depuis ie centre de la pièce 3 vers ia poignée 3i. The slider 2 is constituted by a cylindrical rod 20 in the center of which is formed a transverse hole 200 for receiving the stud 210 of an operating part 21, shown in Figure 2b, slidable in a recess 32 of bayonet type practiced since ie center of the piece 3 to ia handle 3i.

La découpe 32 permet de faire coulisser la pièce 2, qui comporte à @ une de ses extrémités 201 une tige cylindrique 22 destinée à traverser 1 extremité 33 de la pièce 3 par une ouverture 34, i extrémité 33 étant de plus petit diamètre que le corps 35 de la pièce 3 et étant filetée extérieurement. The cutout 32 allows sliding the piece 2 which has at @ one of its ends 201 a cylindrical rod 22 intended to pass through one end 33 of the workpiece 3 through an opening 34, i end 33 being of smaller diameter than the body 35 of the part 3 and being externally threaded.

La face d extrémité 220 de la tige 22 est destinée à venir au contact de la face supérieure 122 de la tête 12 de l'ancre 1 en vue de ia pousser dans une cavité osseuse. The end face 220 of the rod 22 is intended to come into contact with the upper face 122 of the head 12 of the anchor 1 to ia grow in a bone cavity.

Si on se réfère à la figure 3 on peut voir qu'une pièce 4 destinée au logement d'une ancre i présente une forme globalement cylindrique et que dans une de ses extrémités û est pratiqué axialement un aiésage fiieté 41 dans lequel l'extrémité 33 de la pièce 3 est destinée à être vissée Referring to Figure 3 it can be seen that a part 4 for housing an anchor i has a generally cylindrical shape and in that one of its ends axially û is practiced a aiésage fiieté 41 wherein the end 33 of the part 3 is intended to be screwed
L'extrémité opposée 42 de ia pièce de logement 4 présente ia même configuration que la tête 12 de l'ancre 1, qui peut être introduite dans un alésage 43 pratiqué axialement dans cette extrémité 2 et comportant deux orifices semi-circulaires 44 diamétralement opposés, prolongés chacun par une découpe 440 qui les relie et qui s'étend vers le bord inférieur 45 de la pièce 4. The opposite end 42 of housing part 4 ia present ia same configuration as the head 12 of the anchor 1, which can be inserted in a bore 43 made axially in the end 2 and comprising two semi-circular openings 44 diametrically opposed, each extended by a cutout 440 which connects them and extends towards the lower edge 45 of the part 4.

Lorsque ia tette 12 2 de l'ancre i est en butée contre le fond 430 de @alésage 43, les orifices 44 ainsi que ia découpe 440 viennent en regard, respectivement de l'évidement 120 et de la fente 121, dont les sections transversales sont identiques à ceiles desdits orifices 44 et de ladite découpe 440. Ia when teat 12 2 of the anchor i is in abutment against the bottom 430 @ bore 43, ports 44 and cutting ia 440 come to face respectively of the recess 120 and slot 121, whose cross sections are identical to ceiles said ports 44 and said cutout 440.

Le bord supérieur 45' de a découpe 440 est arrondi de manière à faciliter 1 insertion d'un fil de suture 7 dans ladite découpe jusque dans les orifices 44 et donc dans l'orifice 120 de la tête 12 de l'ancre l lorsque celle-cl y est logée. The upper edge 45 'has cutout 440 is rounded to facilitate one insertion of a suture in said cutout 7 into the holes 44 and thus into the hole 120 of the head 12 of the anchor when the -cl is housed there.

On peut également remarquer que le fond 430 de i'alésage 43 de la pièce de logement 4 communique axialement par un perçage 46, d'un diamètre sensiblement supérieur à celui de la tige 22 de la pièce 2, avec l'alésage 41 pratiqué dans i extrémite 40 de ia pièce 4. One can also notice that the bottom 430 of bore diameter does 43 of the housing part 4 communicates axially with a bore 46 with a diameter substantially greater than that of the rod 22 of the part 2, with the bore 41 formed in i end 40 of part 4 ia.

Si on se réfère maintenant a la figure 4a on peut voir que la pièce de logement 4 est fixée par vissage sur i extrémité 33 de la pièce 3 alors que ia pièce coulissante 2 est placée dans sa position haute par l'intermédiaire de ia pièce de manoeuvre 21, la tige 22 de ladite pièce 2 étant positionnée, perpendiculairement, contre la face supérieure 122 de la tete 12 de i'ancre 1 qui est logée dans la cavité 43 de ia pièce de logement 4, dont le bord plat inférieur 47 est en contact avec ie bord 50 d'une cavité osseuse 61. If reference is now made to Figure 4a it can be seen that the housing part 4 is screwed on end 33 i of the component 3 while ia slider 2 is placed in its upper position through ia Part operation 21, the rod 22 of said part 2 are positioned perpendicularly against the upper face 122 of the head 12 of the anchor 1, which is housed in the cavity 43 of ia housing part 4, the lower flat edge 47 is ie in contact with edge 50 of a bone cavity 61.

L'ancre i, qui a été préalablement refroidie à une température très basse, est insérée partiellement par sa partie inférieure arrondie @4 dans la cavité 61, ses ailettes il appliquées contre e corps 15, an cordon ou un ligament artificiel 7 étant prêt à être inséré dans l'évidement i20. The anchor i, which has been previously cooled to a very low temperature, is partially inserted by its rounded lower part @ 4 in the cavity 61, its fins it applied against body 15 e, an artificial ligament or cord 7 being ready to be inserted into the recess i20.

Sur la figure 4b on peut voir que ancre 1 est insérée dans ia cavité osseuse 61, ie cordon 7, dont les deux extrémités libres 70 et 71 se trouvent de part et d'autre de ia pièce de logement 4, etant inséré dans l'évidement 120 de la tête 12 de 1 ancre 1. In Figure 4b it can be seen that anchor 1 is inserted into ia bone cavity 61, ie cord 7, of which the two free ends 70 and 71 are located on either side of ia housing part 4, being inserted into the recess 120 of the head 12 of one anchor 1.

5 insertion totale de l ancre i dans ia cavité osseuse 51 est réalisée en actionnant le coulissement vers le bas, grâce à la pièce de manoeuvre 21, de la pièce coulissante 2 dont la pointe 22 est en appui contre la face supérieure 122 de la tête 12 de ladite ancre 1. 5 full insertion of the anchor i in ia bone cavity 51 is performed by operating the slide down through the operating member 21, the slider 2 whose tip 22 bears against the upper face 122 of the head 12 of the anchor 1.

La tlge coulissante 2 peut avantageusement comprendre un système électrique de type connu, alimente par exemple par une pile bouton et déclenché par l'intermédiaire de la pièce de manoeuvre 21, destiné à chauffer la tige 22, réalisée en un matérlau conducteur de ia chaleur, lorsque celle-ci est au contact de 1 ancre 1. On peut ainsi porter rapidement l'ancre l, une fois insérée totalement dans la cavité osseuse 61, à une température plus élevée, en dépliant de ce fait les ailettes d accrocnage 11 qui bloquent l'ancre 1 dans la cavité osseuse 61. The sliding tlge 2 may advantageously include an electrical system of known type, fed for example by a button battery and triggered via the operating member 21, for heating the rod 22 made of a heat conductive ia matérlau, when the latter is in contact with one anchor 1. it is thus quickly bring the anchor, once completely inserted into the bone cavity 61, at a higher temperature, thereby unfolding the fins 11 which block accrocnage anchor 1 in the bone cavity 61.

Le fait de rechauffer précisément l'ancre 1 à i aide de ia tige 22 permet ce ne pas risquer de brûler les tissus environnants, comme c est fréquemment le cas avec les dispositifs connus à ce gour. The fact of reheating precisely anchor 1 to i using ia rod 22 allows not risk burning the surrounding tissue, c as is frequently the case with the devices known gur.

Si on se refère enfin à la figure 5, on peut voir sur cette figure que dans un deuxième mode de réalisation du dispositif c insertion de I ancre, ce dernier est constitué d'ne tige z rétrécie al une de ses extrémites 51, qui est solidarisée à la face supérieure 122 de ia tête 12 de l'ancre 1 par une zone autocassable 52. If we finally Referring to Figure 5, one can see in this figure that in a second embodiment of the device I c inserting anchor, the latter consists of only stem z narrowed al one end 51, which is joined to the upper face 122 of ia head 12 of the anchor 1 via a breakable zone 52.

La fente 121 de la tête ce 1 ancre l se situe avantageusement dans le prolongement de 1 extrémité rétrécle 51 de la tige 5 de manière à rendre plus aisé le passage du fil de suture. The slot 121 of the head 1 that the anchor is preferably in the extension of one rétrécle end 51 of the rod 5 so as to make easier the passage of the suture.

Dans ce mode de réalisation - ancre 1 est mise en place dans la cavité osseuse à l aide de ia tige 5 puis la zone d'attache 52 est rompue par le chirurgien en exerçant soit une flexion soit une torsion sur ia tige 5. In this embodiment - anchor 1 is inserted into the bone cavity to aid ia rod 5 and the fastening zone 52 is broken by the surgeon or by exerting a bending or twisting on ia rod 5.

Claims (5)

DEVENDICATIONS DEVENDICATIONS
1) Ancre (1) destinée à être insérée dans une cavité osseuse caractérisée en ce qu'elle comprend un corps (15) de forme globalement cylindrique à la périphérie duquel sont découpées longitudinalement des ailettes (11) solidarisées par leur extrémité inférieure (10) audit corps (15), lequel est surmonté d'une tête (12) de forme cylindrique dans laquelle est pratiqué diamétralement un évidement (120) de forme sensiblement cylindrique prolongé par une fente (121) qui s étend jusqu au voisinage du ooro inférieur (130) de ladite tête 12. 1) Anchor (1) for insertion into a bone cavity characterized in that it comprises a body (15) generally cylindrical in shape to the periphery of which are cut longitudinally of the fins (11) secured at their lower end (10) said body (15) which is surmounted by a head (12) of cylindrical shape in which is practiced a diametrically recess (120) of substantially cylindrical shape prolonged by a slot (121) that stretches up to the vicinity of the lower Ooro ( 130) of said head 12.
2 Ancre selon la revendication i caractérisée en ce qu'elle est réalisée dans un matériau à mémoire de forme. 2 Anchor according to Claim i characterized in that it is made of a shape memory material.
3) Dispositif d'insertion de 1 ancre selon la revendication 1 ou ia revendication 2 dans une cavité osseuse caractérisé en qu 11 est constitué de deux pièces (2,3) de forme allongée dont la première pièce (2) coulisse dans la deuxième pièce (3) ouverte à son extrémité inférieure (33) de manière à laisser passer une tige cylindrique (22) solidaire de 1 extrémité (20) de la pièce (2) coulissante pour lui permettre de venir au contact sensiblement perpendiculairement avec la face supérieure (122) de la tête (12) de l'ancre (1) en vue de la pousser dans la cavité osseuse (61), l ancre (1) étant préalablement logée dans une pièce de logement (4) solidarisée par l'une de ses extrémités (40) à 1 extrémité (33) de la pièce (3) allongée, la pièce de logement (4) présentant une découpe (44, 440) complémentaire de ia découpe (120,121) pratiquée dans la tête (121 ae l ancre (1), laquelle vient en regard de la découpe (44, 440) de ia pièce de logement 4) l 3) insertion device 1 anchor according to claim 1 or claim 2 ia a bone cavity characterized in that 11 consists of two parts (2,3) of elongate shape of which the first part (2) slides in the second part (3) open at its lower end (33) so as to pass a cylindrical rod (22) integral with one end (20) of the workpiece (2) slide to enable it to come into contact substantially perpendicularly with the upper face ( 122) of the head (12) of the anchor (1) in order to push it into the bone cavity (61), the anchor (1) is previously accommodated in a housing part (4) fastened by one of its ends (40) at one end (33) of the workpiece (3) elongate, the housing part (4) having a cutout (44, 440) complementary to ia recess (120,121) formed in the head (121 ae the anchor (1) which comes opposite the cutout (44, 440) ia housing part 4) the orsque ladite ancre (1) est positionnée dans acite pièce de logement (4). hen said anchor (1) is positioned in acity housing part (4).
4) Dispositif d'insertion de 1 ancre (1) selon la revedication 3 caraclérlsé en ce que ia tlge coulissante (2) comprend un système électrique destiné a chauffer la pointe (22), realisée en un matériau conducteur de la cnaieur, lorsque celle-cl est au contact de la tête (12) de 'ancre (l) 4) An insertion of one anchor (1) according to revedication 3 caraclérlsé in that ia tlge slide (2) comprises an electrical system for heating the tip (22) made of a conductive material of the cnaieur, when the -cl is in contact with the head (12) of the anchor (l)
5) Dispositif d'insertion de 1 ancre selon la revendication 1 ou la revendication 2 dans une cavité osseuse, caractérisé en ce qu'il comprenà une tige (5) solidarisée à la face supérieure (122) de la tête (12) de l ancre (1) par une de ses extrémités rétrécie (51) qui forme une zone d'attache (52) autocassable. 5) insertion device 1 anchor according to claim 1 or claim 2 into a bone cavity, characterized in that it comprenà a rod (5) joined to the upper face (122) of the head (12) of anchor (1) by one of its tapered ends (51) which forms an attachment zone (52) breakable.
FR9503306A 1995-03-16 1995-03-16 Anchor destiny to be inserted into a bone cavity. Expired - Fee Related FR2731610B1 (en)

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