FR2794968A1 - Intersomatic spinal implant with anchoring elements - Google Patents

Intersomatic spinal implant with anchoring elements Download PDF

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Publication number
FR2794968A1
FR2794968A1 FR9907669A FR9907669A FR2794968A1 FR 2794968 A1 FR2794968 A1 FR 2794968A1 FR 9907669 A FR9907669 A FR 9907669A FR 9907669 A FR9907669 A FR 9907669A FR 2794968 A1 FR2794968 A1 FR 2794968A1
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FR
France
Prior art keywords
gt
lt
implant
cam
anchoring elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR9907669A
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French (fr)
Other versions
FR2794968B1 (en
Inventor
Yves Crozet
Couedic Regis Le
Fabien Gauchet
Denis Pasquet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STRYKER EUROPEAN HOLDINGS I, LLC, US
Original Assignee
Stryker Spine SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stryker Spine SAS filed Critical Stryker Spine SAS
Priority to FR9907669A priority Critical patent/FR2794968B1/en
Priority claimed from AT99957143T external-priority patent/AT265833T/en
Publication of FR2794968A1 publication Critical patent/FR2794968A1/en
Application granted granted Critical
Publication of FR2794968B1 publication Critical patent/FR2794968B1/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

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    • A61F2220/0025Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0041Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements using additional screws, bolts, dowels or rivets, e.g. connecting screws
    • AHUMAN NECESSITIES
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    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0004Rounded shapes, e.g. with rounded corners
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    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • A61F2230/0017Angular shapes
    • AHUMAN NECESSITIES
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    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • A61F2230/0019Angular shapes rectangular
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    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • AHUMAN NECESSITIES
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    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • A61F2230/0028Shapes in the form of latin or greek characters
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    • AHUMAN NECESSITIES
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    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • 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
    • A61F2230/00Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
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    • A61F2230/0082Three-dimensional shapes parallelepipedal

Abstract

The implant consists of a body (4) with one or more moving anchoring elements (26) extending from a contact face (6) when actuated by a sliding cam (630). The cam has a threaded surface to interact in the manner of a nut and bolt with an actuator which is accessible from outside the implant body. In a variant of the design the implant can have two cams interacting with two anchoring elements operated by a single actuator.

Description

L'invention concerne les implants intersomatiques rachidiens. The invention relates to spinal interbody implants.

on connaît du document US-5 <B>800</B> 547 un implant intersomatique rachidien comprenant un corps, des éléments d'ancrage mobiles dans des conduits du corps pour s'étendre en saillie de celui-ci, et une came permettant de manceuvrer chacun de ces éléments d'ancrage par effet de rampe. is known from document US-5 <B> 800 </ B> 547 an interbody spinal implant comprising a body, movable anchoring elements in tubes of the body to extend projecting therefrom, and a cam enabling manceuvrer of each of these anchoring elements by ramp effect. Aussi, après ablation du disque intervertébral et insertion de l'implant entre les deux plateaux vertébraux en lieu et place du disque, la manceuvre de la came permet-elle d'étendre les éléments d'ancrage pour qu'ils pénètrent dans les plateaux vertébraux et immobilisent l'implant. Also, after removal of the intervertebral disc and inserting the implant between the vertebral endplates in place of the disc, the cam manceuvre it allows to extend the anchoring elements so that they penetrate the endplates and immobilize the implant. Toutefois, un tel implant requiert une grande précision dans le guidage<B>à</B> coulissement de chaque élément d'ancrage dans le conduit du corps. However, such an implant requires high precision in the guide <B> at </ B> sliding each anchoring element in the duct of the body. Faute de cela, l'élément d'ancrage, lorsqu'il S'étend, a tendance<B>à</B> prendre une mauvaise position préjudiciable<B>à</B> la qualité de l'immobilisation. Short of that, the anchor when Extends tends <B> by </ B> take a bad position detrimental <B> by </ B> the quality of the asset. Cette nécessité d'un bon guidage oblige<B>à</B> donner une longueur assez importante au conduit logeant l'élément et donc une épaisseur importante<B>à</B> la paroi présentant ce conduit, laissant ainsi peu de place pour les autres parties de l'implant, par exemple la came. This need for good guidance requires <B> by </ B> to a sizeable length to the conduit housing the element and therefore a significant thickness <B> by </ B> the wall with the duct, leaving little space for other parts of the implant, for example the cam. De plus, un tel implant oblige<B>à</B> usiner des surfaces de came précises pour les éléments respectifs, ce qui est coûteux. In addition, such an implant requires <B> at </ B> machine specific cam surfaces to the respective elements, which is expensive.

Un but de l'invention est de simplifier le guidage des éléments d'ancrage. An object of the invention is to simplify the guide of the anchoring elements.

En vue de la réalisation de ce but, on prévoit selon l'invention un implant intersomatique rachidien comportant un corps et au moins deux éléments d'ancrage mobiles par rapport au corps pour pouvoir s'étendre en saillie d'au moins une face externe du corps, l'implant comportant un porte-éléments relié rigidement aux éléments d'ancrage. In view of achieving this purpose, the invention provides an interbody spinal implant comprising a body and at least two anchoring elements mobile relative to the body to be able to extend projecting from at least one outer face of the body, the implant comprising a door rigidly connected elements to the anchoring elements.

Ainsi, le porte-éléments rend possible de guider les éléments d'ancrage en bloc et non<B>plus</B> indépendamment les uns des autres. Thus, the component holder makes it possible to guide the block anchoring elements and not <B> more </ B> independently of each other. Dès lors, il n'est plus nécessaire de guider chacun des éléments d'ancrage avec une grande précision. Therefore, it is no longer necessary to guide each of the anchors with great precision. Il suffit de guider convenablement l'ensemble des éléments d'ancrage fixés entre eux. It is sufficient to suitably guide the assembly of the anchoring elements fixed together. On peut notamment réduire la longueur du conduit de guidage de chaque élément. Mention may in particular reduce the guide duct of the length of each element. De même, la came éventuelle n'a plus besoin d'être très précise, ni même de présenter une rampe de guidage en propre pour chaque élément d'ancrage. Similarly, the possible cam does not need to be very accurate, or even to present a guide ramp own for each anchor.

Avantageusement, la face externe est plane, les éléments d'ancrage étant aptes<B>à</B> s'étendre en saillie de la même face externe. Advantageously, the external surface is flat, the anchoring elements being capable <B> at </ B> extend projecting from the same external surface.

Avantageusement, les deux éléments d'ancrage S'étendent<B>à</B> distance l'un de l'autre et dans un même canal du corps. Advantageously, the two anchoring elements extending <B> at </ B> distance from one another and in a same channel of the body.

Ainsi, on fait l'économie de la réalisation d'un canal. Thus it is the economy of the realization of a channel.

Avantageusement, l'implant présente un évidement traversant l'implant et débouchant sur la face externe, le canal débouchant latéralement dans l'évidement. Advantageously, the implant has a recess passing through the implant and opening on the outer face, the channel opening laterally into the recess.

Avantageusement, l'implant comporte une came apte<B>à</B> déplacer les éléments d'ancrage pour les mettre en saillie de la face externe. Advantageously, the implant comprises a cam capable <B> at </ B> move the anchoring elements to bring them projecting from the outer face.

Avantageusement, la came est apte<B>à</B> déplacer les éléments d'ancrage par coulissement de la came par rapport au corps. Advantageously, the cam is capable <B> at </ B> move the anchoring elements by displacement of the cam relative to the body.

Avantageusement, la came est apte<B>à</B> déplacer les éléments d'ancrage par action sur le porte-éléments. Advantageously, the cam is capable <B> at </ B> moving action by anchoring elements on the component holder. Avantageusement, la came présente une unique rampe pour mettre les éléments d'ancrage en saillie. Advantageously, the cam has a single rail to bring the anchoring elements projecting. Avantageusement, la came est apte<B>à</B> déplacer chaque élément d'ancrage dans deux sens de déplacement opposés. Advantageously, the cam is capable <B> at </ B> moving each anchoring element in two opposite directions of movement.

Ainsi, la came permet de mettre les éléments d'ancrage en saillie et de supprimer cette saillie, par exemple en vue d'ôter l'implant. Thus, the cam makes it possible the anchoring elements projecting and remove this projection, for example in order to remove the implant.

Avantageusement, la came présente une extrémité filetée. Advantageously, the cam has a threaded end.

Cette extrémité peut être accouplée<B>à</B> un instrument fileté pour la manceuvre de la came. This end can be coupled to <B> at </ B> a threaded tool for manceuvre of the cam.

Avantageusement, l'implant comporte au moins deux autres éléments d'ancrage mobiles par rapport au corps pour pouvoir s'étendre en saillie d'une deuxième face externe du corps et un deuxième porte-éléments relié rigidement aux dits autres éléments d'ancrage. Advantageously, the implant comprises at least two other mobile anchoring elements relative to the body to be able to extend projecting from a second outer face of the body and a second rigidly connected to said door elements other anchoring elements.

Avantageusement, la came est unique et apte<B>à</B> déplacer les éléments d'ancrage associés<B>à</B> des faces différentes. Advantageously, the cam is unique and capable <B> at </ B> move the anchoring elements associated <B> at </ B> different sides.

D'autres caractéristiques et avantages de l'invention apparaîtront encore dans la description suivante d'un mode préféré de réalisation donné<B>à</B> titre d'exemple non limitatif. Other features and advantages of the invention will become apparent from the following description of a preferred embodiment given <B> by </ B> As a non-limiting example. Aux dessins annexés<B>:</B> <B>-</B> la figure<B>1</B> est une vue en perspective d'un implant selon un mode de réalisation de l'invention<B>;</B> <B>-</B> la figure 2 est une vue en coupe de l'implant suivant le plan II-II de la figure<B>1 ;</B> <B>-</B> les figures<B>3</B> et 4 sont deux vues en perspective de la came et des porte-éléments de l'implant de la figure<B>1</B> respectivement en position rétractée et en position étendue des éléments<B>;</B> et <B>-</B> la figure<B>5</B> est une vue en coupe de la came et des porte-éléments suivant le plan médian VV de la figure 4. To the accompanying drawings <B>: </ B> <B> - </ B> Figure <B> 1 </ B> is a perspective view of an implant according to an embodiment of the invention <B> ; </ B> <B> - </ B> Figure 2 is a sectional view of the implant according to the plane II-II of Figure <B> 1; </ B> <B> - </ B > figures <B> 3 </ B> and 4 are two perspective views of the cam and the carrier elements of the implant of Figure <B> 1 </ B> in the retracted position and extended position respectively elements <B> </ B> and <B> - </ B> Figure <B> 5 </ B> is a sectional view of the cam and door elements according to the median plane VV of Figure 4 .

on va décrire un mode de réalisation de l'implant en référence aux figures<B>1 à 5.</B> L'implant 2 comprend un corps 4 ayant en plan une forme générale de haricot<B>à</B> hile postérieure, aplati suivant une dimension de façon <B>à</B> définir deux grandes faces supérieure et inférieure<B>6</B> et une face latérale périphérique<B>8.</B> Les faces supérieure et inférieure<B>6</B> ont une forme générale plane et un profil transversal en dents de scie ou zigzag, les sommets des dents définissant des arêtes continues parallèles entre elles. will be described an embodiment of the implant with reference to Figs <B> 1-5. </ B> The implant 2 comprises a body 4 having in plan a general shape of bean <B> at </ B> posterior hilum, flattened along one dimension so as <B> to </ B> define two large faces upper and lower <B> 6 </ B> and a peripheral side surface <B> 8. </ B> The upper faces and lower <B> 6 </ B> has a generally planar and a cross-sectional profile or zigzag saw teeth, the tips of the teeth defining parallel continuous ridges therebetween. Ces arêtes assurent une bonne prise des faces supérieure et inférieure<B>6</B> sur les plateaux des corps vertébraux des vertèbres formant l'emplacement de destination. These ridges provide a good grip of the upper and lower sides <B> 6 </ B> on the plates of the vertebral bodies of the vertebrae forming the destination location.

Le corps 4 présente deux évidements traversants<B>10</B> S'étendant de l'une<B>à</B> l'autre des faces supérieure et inférieure<B>6</B> en débouchant sur celles-ci. The body 4 has two through grooves <B> 10 </ B> Stretching of a <B> at </ B> the other of the top and bottom surfaces <B> 6 </ B> opening on those -this. Lors de la mise en place de l'implant, les évidements<B>10</B> sont remplis de greffon qui pourra ainsi croître en direction des plateaux vertébraux<B>à</B> travers les évidements<B>10.</B> During the establishment of the implant, the recesses <B> 10 </ B> are filled with graft that can thus grow in the direction of the endplates <B> at </ B> through the recesses <B> 10. </ B>

Le corps 4 présente un conduit cylindrique 14 S'étendant avec son axe<B>16</B> entre les évidements<B>10</B> parallèlement<B>à</B> un plan général des faces supérieure et inférieure<B>6</B> en étant séparé de l'unique portion plane de la face latérale<B>8</B> par l'un des évidements<B>10.</B> Le conduit 14 débouche<B>à</B> une seule de ses extrémités. The body 4 has a cylindrical conduit 14 extending with its axis <B> 16 </ B> between the recesses <B> 10 </ B> parallel <B> at </ B> a general plane of the upper and lower faces <B> 6 </ B> being separated from the one planar portion of the side wall <B> 8 </ B> by one of the recesses <B> 10. </ B> the conduit 14 opens <B > at </ B> one of its ends.

Le corps 4 présente deux canaux 22 débouchant chacun sur les deux faces supérieure et inférieure. The body 4 comprises two channels each opening 22 on both upper and lower faces. Chaque canal 22 est profilé suivant un axe perpendiculaire aux faces externes et a en section un profil rectangulaire arrondi<B>à</B> ses extrémités. Each channel 22 is profiled along an axis perpendicular to the outer faces and has a rounded rectangular section profile <B> at </ B> its ends. Chaque canal débouche latéralement d'un côté sur toute sa hauteur dans l'un respectif des évidements<B>10</B> auquel il est contigu. Each channel opens laterally on one side over its entire height in a respective one of the recesses <B> 10 </ B> which it is contiguous. Par ailleurs, il débouche latéralement du côté opposé par sa partie médiane dans le conduit 14. Les deux canaux 22 s'étendent en regard l'un de l'autre, de part et d'autre du conduit 14. Les canaux 22 mettent ainsi en communication mutuelle les deux évidements<B>10</B> et le conduit 14. Furthermore, it opens laterally from the opposite side with its middle part in the duct 14. The two channels 22 extend facing one another, on either side of the conduit 14. The channels 22 thus put intercommunicate the two recesses <B> 10 </ B> and the conduit 14.

Chaque canal 22 reçoit au voisinage de chaque face externe deux éléments d'ancrage sous la forme chacun d'un picot<B>26</B> ayant un corps cylindrique lisse présentant<B>à</B> une extrémité la plus proche de la face<B>6</B> une pointe. Each channel 22 receives adjacent each outer face two anchoring elements each in the form of a pin <B> 26 </ B> having a smooth cylindrical body having <B> at </ B> a closest end of the face <B> 6 </ B> a tip. Chaque picot<B>26</B> s'étend contre un bord courbe respectif du canal en vue de coulisser contre celui-ci perpendiculairement<B>à</B> la face externe<B>6</B> du corps. Each pin <B> 26 </ B> extends against a respective curved edge of the channel in order to slide against the latter perpendicularly <B> at </ B> the outer surface <B> 6 </ B> the body .

L'implant comporte deux porte-picots ou porte- éléments d'ancrage<B>80</B> associés aux faces externes<B>6</B> respectives. The implant comprises two pins carrier holder or anchoring elements <B> 80 </ B> associated with external surfaces <B> 6 </ B> respectively. Chaque porte-picots <B>80</B> a une forme générale plate en<B> </B> H<B> </B> comprenant deux branches rectilignes<B>82</B> parallèles entre elles et un tronçon médian 84 rejoignant les branches<B>à</B> leur milieu. Each sprocket carrier <B> 80 </ B> has a generally flat shape in <B> </ B> H <B> </ B> comprising two straight branches <B> 82 </ B> parallel to each other and central portion 84 joining the legs <B> at </ B> their environment. Chaque porte- picots <B>80</B> porte rigidement fixé<B>à</B> celui-ci les quatre picots<B>26</B> associés<B>à</B> la face externe<B>6</B> concernée. Each carrier pins <B> 80 </ B> Door rigidly secured <B> at </ B> thereof the four pins <B> 26 </ B> associated <B> at </ B> the outer face < B> 6 </ B> concerned. Les quatre picots<B>26</B> reposent par leur base aux extrémités respectives des branches<B>82,</B> tous d'un même côté du porte-picots. The four pins <B> 26 </ B> rest with their base to the respective ends of the legs <B> 82, </ B> together with one side of the carrier pins. Les deux porte-picots <B>80</B> s'étendent en permanence au droit l'un de l'autre avec leurs contours en coincidence, et cela que les picots<B>26</B> soient en position étendue ou rétractée, comme lillustrent les figures<B>3</B> et 4. Les branches<B>82</B> s'étendent dans les canaux 22 respectifs dont elles présentent le profil tandis que le tronçon médian 84 s'étend transversalement dans le conduit 14. The two carrier pins <B> 80 </ B> extend continuously to the right from one another with their edges in register, and that the pins <B> 26 </ B> are in the extended position or retracted, as lillustrent Figs <B> 3 </ B> and 4. the branches <B> 82 </ B> extend into the respective channels 22 in which they present the profile while the central section 84 extends transversely in the duct 14.

L'implant comporte une came<B>30</B> présentant des 'Laces cylindriques<B>31</B> gauche et droite<B>à</B> l'arrière et supérieure et inférieure<B>à</B> l'avant pour guider la came<B>à</B> coulissement dans le conduit cylindrique 14. On désigne par arrière de la came son extrémité la plus proche de l'embouchure du conduit 14. Pour chaque porte-picots <B>80,</B> la came<B>30</B> comprend en propre une glissière<B>33</B> et une surface d'appui<B>35</B> visibles notamment aux figures 2 et <B>5.</B> La glissière<B>33</B> est formée par un conduit très aplati, ouvert sur ses deux bords longitudinaux, incliné par rapport<B>à</B> l'axe<B>16</B> en se rapprochant de la face externe<B>6</B> associée depuis l'extrémité avant jusqu'à une zone médiane de la came. The implant includes a cam <B> 30 </ B> having 'cylindrical Laces <B> 31 </ B> left and right <B> at </ B> and the rear upper and lower <B> at < / B> the front to guide the cam <B> at </ B> slide in the cylindrical conduit 14 back by means of the cam is its end nearest the mouth of the conduit 14. each door-pins <B> 80, </ B> cam <B> 30 </ B> comprises an own slide <B> 33 </ B> and a bearing surface <B> 35 </ B> particularly visible in figures 2 and <B> 5. </ B> the slide <B> 33 </ B> is formed by a duct very flat, open on its two longitudinal edges, inclined <B> at </ B> the axis <B> 16 </ B> by approaching the outer surface <B> 6 </ B> associated from the front end to a middle area of ​​the cam. La glissière<B>33</B> est borgne<B>à</B> l'avant et ouverte<B>à</B> l'arrière, la face la plus interne 41 de la glissière étant en continuité avec la surface d'appui<B>35.</B> Cette dernière est parallèle<B>à</B> l'axe<B>16</B> et<B>à</B> la face externe<B>6</B> associée. The slide <B> 33 </ B> is blind <B> at </ B> before the open and <B> at </ B> the rear, the innermost face 41 of the slide being in continuity with the bearing surface <B> 35. </ B> the latter is parallel <B> at </ B> the shaft <B> 16 </ B> and <B> at </ B> the outer face < B> 6 </ B> associated. Le tronçon médian 84 peut être manceuvré par appui sur la glissière<B>33</B> et la surface d'appui<B>35,</B> comme on le verra plus loin. The central section 84 may be manceuvré by pressing the slide <B> 33 </ B> and the bearing surface <B> 35, </ B> as discussed below. Les glissières inclinées<B>33</B> et les surfaces d'appui parallèles<B>35</B> donnent<B>à</B> la came une forme d'ancre de marine. inclined slide the <B> 33 </ B> and parallel bearing surfaces <B> 35 </ B> provide <B> at </ B> the cam form of a marine anchor.

<B>A</B> son extrémité arrière, la came présente un conduit taraudé<B>37</B> dont le filet peut être mis en prise avec celui d'un outil adapté afin de man#uvrer la came pour la pousser ou la tirer. <B> A </ B> its rear end, the cam has a threaded conduit <B> 37 </ B> of which the net can be engaged with one of a suitable tool to man # uvrer the cam to the push or pull.

L'implant est utilisé de la façon suivante, les picots<B>26</B> étant initialement en position rétractée, comme sur la figure<B>3.</B> Après ablation d'un disque intervertébral, et après avoir rempli les évidements<B>10</B> avec du greffon comme précité, on introduit l'implant 2 entre les corps vertébraux des vertèbres associées au disque ôté. The implant is used in the following manner, the pins <B> 26 </ B> being initially in the retracted position, as in Figure <B> 3. </ B> After removal of an intervertebral disc, and having filled the recesses <B> 10 </ B> with the graft as above, is introduced 2 implant between the vertebral bodies of the vertebrae associated with the disc removed. La hauteur du corps 4 de l'implant correspond sensiblement<B>à</B> l'épaisseur du disque ôté. The height of the body 4 of the implant is substantially <B> at </ B> the thickness of the removed disc. Les faces<B>6</B> s'étendent en regard des plateaux vertébraux respectifs, parallèlement<B>à</B> ceux-ci et en contact avec ceux-ci. The sides <B> 6 </ B> extend opposite respective endplates parallel <B> at </ B> thereof and in contact therewith. La came est près de l'embouchure du conduit 14, <B>à</B> l'arrière. The cam is near the mouth of conduit 14, <B> at </ B> the rear.

on visse l'outil dans le conduit<B>37</B> de la came et on pousse la came<B>30</B> vers l'avant. tool is screwed into the conduit <B> 37 </ B> of the cam and pushes the cam <B> 30 </ B> forward. Par effet de rampe de chaque tronçon médian 84 sur la face la plus interne 41 de la glissière<B>33</B> associée, cela entraîne le déplacement, perpendiculairement<B>à</B> la face externe<B>6,</B> du porte-picots <B>80</B> et des quatre picots<B>26.</B> By ramp effect for each medial section 84 on the innermost face 41 of the slide <B> 33 </ B> tag, it causes movement perpendicular <B> at </ B> the outer surface <B> 6 , </ B> holder pins <B> 80 </ B> and four pins <B> 26. </ B>

Après mise en saillie des picots<B>26</B> hors de la face externe<B>6,</B> la poursuite de la poussée de la came met le tronçon médian 84 en appui sur la surface d'appui<B>35,</B> comme sur la figure 2, bloquant les picots<B>26</B> en position étendue, ancrés dans les plateaux vertébraux. After setting projecting barbs <B> 26 </ B> out of the outer surface <B> 6, </ B> the continued thrust of the cam brings the central section 84 bears on the bearing surface < B> 35, </ B> as shown in Figure 2, locking the pins <B> 26 </ B> in the extended position, anchored in the vertebral plates. On dévisse alors l'outil pour le séparer de la came. then the tool is unscrewed to separate it from the cam.

Si en revanche on souhaite enlever l'implant, on fixe<B>à</B> nouveau l'outil au conduit<B>37</B> de la came<B>à</B> travers le conduit 14, puis on tire la came<B>à</B> coulissement vers l'arrière. If however it is desired to remove the implant, is fixed <B> at </ B> the tool again to the conduit <B> 37 </ B> of the cam <B> at </ B> through the pipe 14, then the cam is pulled <B> at </ B> sliding backwards. Le tronçon médian 84 suit alors la surface d'appui<B>35</B> puis, par effet de rampe sur la face 43 la plus externe de la glissière<B>33,</B> il est déplacé vers l'axe<B>16</B> vers l'intérieur de l'implant, ce qui rétracte les picots<B>26</B> et supprime leur saillie. The central section 84 then follows the support surface <B> 35 </ B> then by ramp effect on the face 43 of the outermost slide <B> 33, </ B> it is moved to the axis <B> 16 </ B> to the interior of the implant, retracting the pins <B> 26 </ B> and suppresses their projection. La came permet donc de man#uvrer les picots<B>26</B> dans les deux sens, c'est-à-dire de façon réversible. The cam thus enables the pins uvrer man # <B> 26 </ B> in both directions, that is to say, reversibly.

La fixation entre eux des quatre picots<B>26</B> de chaque groupe permet d'obtenir un guidage très précis de ceux-ci dans les canaux 22 sans prévoir un canal cylindrique pour chaque picot. The fixing between them four pins <B> 26 </ B> of each group allows to obtain a very accurate guiding thereof into the channels 22 without providing a cylindrical channel for each pin. De plus, on obtient ce guidage par une seule surface de rampe en deux parties 41,<B>35</B> ou 43 pour les quatre picots dans un sens de déplacement donné. In addition, this guide is obtained by a single ramp surface into two parts 41, <B> 35 </ B> or 43 for four pins in a given traveling direction.

Chaque picot<B>26</B> présente<B>à</B> la base de la pointe formant sa tête des rainures de révolution<B>39</B> formant des zones en dépouille et améliorant l'ancrage du picot dans le plateau vertébral. Each pin <B> 26 </ B> This <B> at </ B> the base of the tip forming its head revolution grooves <B> 39 </ B> forming undercut areas and improving the anchoring of spike in the endplate.

Le corps 4 est formé en deux parties s'assemblant suivant un plan de joint non illustré parallèle aux faces externes<B>6</B> et passant par l'axe<B>16,</B> pour permettre l'introduction de la came<B>30</B> et des porte-picots <B>80</B> dans le corps. The body 4 is formed in two parts joinable along a parallel unillustrated joint plane external faces <B> 6 </ B> and passing through the axis <B> 16, </ B> to enable the introduction cam <B> 30 </ B> and sprocket carrier <B> 80 </ B> in the body.

Dans une variante de réalisation, la glissière<B>33</B> pourra se prolonger en incorporant la rampe<B>35</B> et être borgne<B>à</B> l'avant et<B>à</B> l'arrière, chaque porte-picots étant démontable de façon<B>à</B> pouvoir séparer le tronçon médian 84 d'au moins l'une des branches<B>82</B> et ainsi pouvoir introduire le tronçon médian 84 latéralement dans la glissière<B>33, 35.</B> In an alternative embodiment, the slideway <B> 33 </ B> can be extended by incorporating the ramp <B> 35 </ B> be blind and <B> at </ B> the front and <B> to </ B> the rear, each carrier pins being removable so as <B> to </ B> to separate the central portion 84 of at least one arm <B> 82 </ B> and thus be able introducing the central section 84 laterally in the guide <B> 33, 35. </ B>

Claims (1)

  1. <U>REVENDICATIONS</U> <B>1 -</B> Implant intersomatique rachidien (2) comportant un corps (4) et au moins deux éléments d'ancrage<B>(26)</B> mobiles par rapport au corps pour pouvoir s'étendre en saillie d'au moins une face externe<B>(6)</B> du corps, caractérisé en ce qu'il comporte un porte-éléments <B>(80)</B> relié rigidement aux éléments d'ancrage<B>(26).</B> 2. Implant selon la revendication<B>1,</B> caractérisé en ce que la face externe<B>(6)</B> est plane, les éléments d'ancrage<B>(26)</B> étant aptes<B>à</B> s'étendre en saillie de la même face externe<B>(6).</B> <B>3.</B> Implant selon la revendication<B>1 ou</B> 2, caractérisé en ce que les deux éléments d'ancrage<B>(26)</B> s'étendent<B>à</B> distance l'un de l'autre et dans un même canal (22) du corps. <U> CLAIMS </ U> <B> 1 - </ B> interbody spinal implant (2) having a body (4) and at least two anchoring elements <B> (26) </ B> movable relative the body to be able to extend projecting from at least one external surface <B> (6) </ B> of the body, characterized in that it comprises a carrier elements <B> (80) </ B> rigidly connected to the anchoring elements <B> (26). </ B> 2. the implant of claim <B> 1, </ B> characterized in that the outer surface <B> (6) </ B> is plane, the anchoring elements <B> (26) </ B> being capable <B> at </ B> extend projecting from the same external surface <B> (6). </ B> < B> 3. </ B> the implant of claim <B> 1 or </ B> 2, characterized in that the two anchoring elements <B> (26) </ B> extending <B> to </ B> distance from one another and in the same channel (22) of the body. 4. Implant selon la revendication<B>3,</B> caractérisé en ce que l'implant (2) présente un évidement<B>(10)</B> traversant l'implant et débouchant sur la face externe <B>(6),</B> le canal (22) débouchant latéralement dans l'évidement. 4. The implant of claim <B> 3 </ B> characterized in that the implant (2) has a recess <B> (10) </ B> through the implant and opening on the outer surface <B > (6) </ B> the channel (22) opening laterally into the recess. <B>5.</B> Implant selon l'une quelconque des revendications<B>1 à</B> 4, caractérisé en ce qu'il comporte une came<B>(30)</B> apte<B>à</B> déplacer les éléments d'ancrage <B>(26)</B> pour les mettre en saillie de la face externe<B>(6).</B> <B>6.</B> Implant selon la revendication<B>5,</B> caractérisé en ce que la came<B>(30)</B> est apte<B>à</B> déplacer les éléments d'ancrage<B>(26)</B> par coulissement de la came par rapport au corps (4). <B> 5. </ B> An implant according to any one of claims <B> 1 </ B> 4, characterized in that it comprises a cam <B> (30) </ B> capable <B > at </ B> move the anchoring elements <B> (26) </ B> to bring them projecting from the outer surface <B> (6). </ B> <B> 6. </ B > the implant of claim <B> 5, </ B> characterized in that the cam <B> (30) </ B> is adapted <B> at </ B> move the anchoring elements <B> ( 26) </ B> by sliding of the cam relative to the body (4). <B>7.</B> Implant selon la revendication<B>5</B> ou<B>6,</B> caractérisé en ce que la came<B>(30)</B> est apte<B>à</B> déplacer les éléments d'ancrage<B>(26)</B> par action sur le porte- éléments <B>(80).</B> <B>8.</B> Implant selon l'une quelconque des revendications<B>5 à 7,</B> caractérisé en ce que la came<B>(30)</B> présente une unique rampe (41,<B>35)</B> pour mettre les éléments d'ancrage<B>(26)</B> en saillie. <B> 7. </ B> The implant of claim <B> 5 </ B> or <B> 6, </ B> characterized in that the cam <B> (30) </ B> is adapted < B> at </ B> move the anchoring elements <B> (26) </ B> by acting on the carrier elements <B> (80). </ B> <B> 8. </ B> implant according to any one of claims <B> 5-7, </ B> characterized in that the cam <B> (30) </ B> has a single rail (41, <B> 35) </ B > to the anchoring elements <B> (26) </ B> projections. <B>9.</B> Implant selon l'une quelconque des revendications<B>5 à 8,</B> caractérisé en ce que la came<B>(30)</B> est apte<B>à</B> déplacer chaque élément d'ancrage<B>(26)</B> dans deux sens de déplacement opposés. <B> 9. </ B> An implant according to any one of claims <B> 5-8, </ B> characterized in that the cam <B> (30) </ B> is adapted <B> to </ B> moving each anchor member <B> (26) </ B> in two opposite directions of movement. <B>10.</B> Implant selon l'une quelconque des revendications<B>5 à 9,</B> caractérisé en ce que la came<B>(30)</B> présente une extrémité filetée<B>(37).</B> <B>il.</B> Implant selon l'une quelconque des revendications<B>1 à 10,</B> caractérisé en ce qu'il comporte au moins deux autres éléments d'ancrage<B>(26)</B> mobiles par rapport au corps (4) pour pouvoir s'étendre en saillie d'une deuxième face externe<B>(6)</B> du corps et un deuxième porte-éléments <B>(80)</B> relié rigidement aux dits autres éléments d'ancrage<B>(26).</B> 12. Implant selon la revendication<B>11</B> et l'une quelconque des revendications<B>5 à 10,</B> caractérisé en ce que la came<B>(30)</B> est unique et apte<B>à</B> déplacer les éléments d'ancrage<B>(26)</B> associés<B>à</B> des faces<B>(6)</B> différentes. <B> 10. </ B> An implant according to any one of claims <B> 5-9, </ B> characterized in that the cam <B> (30) </ B> has a threaded end <B > (37). </ B> <B> there. </ B> an implant according to any one of claims <B> 1 to 10 </ B> characterized in that it comprises at least two other elements anchor <B> (26) </ B> movable relative to the body (4) to be able to extend projecting from a second outer surface <B> (6) </ B> the body and a second holder elements <B> (80) </ B> rigidly connected to said other anchoring elements <B> (26). </ B> 12. the implant of claim <B> 11 </ B> and any claims <B> 5-10, </ B> characterized in that the cam <B> (30) </ B> is unique and capable <B> at </ B> move the anchoring elements <B> (26) </ B> associated <B> at </ B> faces <B> (6) </ B> different.
FR9907669A 1999-06-17 1999-06-17 interbody spinal implant has protruding pins Expired - Fee Related FR2794968B1 (en)

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FR9907669A FR2794968B1 (en) 1999-06-17 1999-06-17 interbody spinal implant has protruding pins

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
FR9907669A FR2794968B1 (en) 1999-06-17 1999-06-17 interbody spinal implant has protruding pins
AT99957143T AT265833T (en) 1998-06-23 1999-06-22 Intersomatisches spinal implant with anchoring elements
PCT/FR1999/001492 WO1999066867A1 (en) 1998-06-23 1999-06-22 Backbone intersomatic implant with anchoring elements
US09/720,150 US6527803B1 (en) 1998-06-23 1999-06-22 Intersomatic spine implant having anchoring elements
CA002336176A CA2336176C (en) 1998-06-23 1999-06-22 Backbone intersomatic implant with anchoring elements
AU42706/99A AU761067B2 (en) 1998-06-23 1999-06-22 Backbone intersomatic implant with anchoring elements
DE1999617026 DE69917026T2 (en) 1998-06-23 1999-06-22 Intersomatisches spinal implant with anchoring elements
JP2000555555A JP4141640B2 (en) 1998-06-23 1999-06-22 Intervertebral implant having a fixed component
EP19990957143 EP1089677B1 (en) 1998-06-23 1999-06-22 Backbone intersomatic implant with anchoring elements

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FR2794968A1 true FR2794968A1 (en) 2000-12-22
FR2794968B1 FR2794968B1 (en) 2002-09-06

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