FR2718955A1 - Intersomatic cage for fusion of lumbar vertebrae - Google Patents

Intersomatic cage for fusion of lumbar vertebrae Download PDF

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Publication number
FR2718955A1
FR2718955A1 FR9405188A FR9405188A FR2718955A1 FR 2718955 A1 FR2718955 A1 FR 2718955A1 FR 9405188 A FR9405188 A FR 9405188A FR 9405188 A FR9405188 A FR 9405188A FR 2718955 A1 FR2718955 A1 FR 2718955A1
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Prior art keywords
cage
characterized
cage according
upper
faces
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Granted
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FR9405188A
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French (fr)
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FR2718955B1 (en
Inventor
Fournet-Fayard Jacques
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Soprane SA
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Soprane SA
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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/50Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
    • A61L27/58Materials at least partially resorbable by the body
    • 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
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4455Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES
    • A61L27/00Materials for grafts or prostheses or for coating grafts or prostheses
    • A61L27/14Macromolecular materials
    • A61L27/18Macromolecular materials obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442Intervertebral or spinal discs, e.g. resilient
    • 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
    • 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
    • A61F2/28Bones
    • A61F2002/2835Bone graft implants for filling a bony defect or an endoprosthesis cavity
    • 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
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    • 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
    • A61F2002/30062(bio)absorbable, biodegradable, bioerodable, (bio)resorbable, resorptive
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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
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    • 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
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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
    • 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
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    • A61F2002/3021Three-dimensional shapes conical frustoconical
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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
    • 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
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    • A61F2002/3028Three-dimensional shapes polyhedral different from parallelepipedal and pyramidal
    • 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
    • A61F2/44Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2002/4475Joints for the spine, e.g. vertebrae, spinal discs hollow
    • 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
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    • A61F2002/448Joints for the spine, e.g. vertebrae, spinal discs comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants
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    • 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
    • A61F2210/0004Particular material properties of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof bioabsorbable
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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
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Abstract

The intersomatic cage (2) has an octagonal cross-section and a vertical aperture (2a) through it, open in the cage's upper and lower faces (2b,2c), designed to receive a graft (3). The upper and lower faces of the cage are inclined to give it a tapering cross-section, and the vertical parallel side faces (2f,2g) are connected to the upper and lower faces by inclined faces (2h). The cage's end faces (2d,2e) are vertical and parallel, they are of the same width but different heights. The cage can be made from an inert metal such as titanium or from resorbable lactic acid polymer.

Description

1 2718955 1 2718955

La présente invention a trait à une cage inter-somatique destinée à The present invention relates to an inter-cage for somatic

La fusion des vertèbres lombaires d'une colonne vertébrale. The fusion of lumbar vertebrae of a spinal column.

On connaît des cages de ce genre qui présentent généralement la forme d'un cylindre creux fermé à chaque extrémité, au moyen d'un profil en ogive et d'un bouchon fileté. Discloses cages of this kind generally have the shape of a hollow cylinder closed at each end by means of a pointed profile and a screw cap. La face extérieure de la cage comporte une série de lumières oblongues débouchant à l'intérieur du cylindre creux. The outer face of the cage comprises a series of elongated slots opening into the interior of the hollow cylinder. La cage est prévue pour recevoir des morceaux de greffons qui viennent en contact par l'intermédiaire des lumières oblongues avec la The cage is adapted to receive pieces of grafts which engage through oblong apertures with the

partie spongieuse de l'os des vertèbres à fixer. spongy part of the bone of the vertebrae to fix.

On constate que ce genre de cage à section circulaire présente une faible surface de contact des greffons avec l'os spongieux des vertèbres It is noted that this kind of circular section cage has a small contact area of ​​the grafts with the spongy bone of the vertebrae

ne permettant pas une parfaite fusion de celles-ci. not allowing a perfect fusion of these. De plus, le chi- In addition, the chi-

rurgien doit parfaitement positionner la cage dans le logement préala- rurgien must perfectly positioning the cage in the housing préala-

blement réalisé entre les vertèbres pour que les lumières oblongues se ably performed between the vertebrae so that the oblong lights

trouvent en face de la partie spongieuse de l'os de ces dernières. located in front of the spongy part of the bone of the latter.

C'est à ces inconvénients qu'entend plus particulièrement remédier It is these drawbacks particular remedy

la présente invention. the present invention.

La cage inter-somatique suivant la présente invention a pour but d'augmenter considérablement la surface du greffon en contact avec l'os spongieux de chacune des vertèbres tout en ayant une bonne résistance Inter-somatic cage according to the present invention aims at increasing the graft surface in contact with the cancellous bone of each of the vertebrae while having good resistance

mécanique à l'écrasement. mechanical crushing.

La cage inter-somatique présente en section une forme octogonale dont la partie interne est traversée verticalement par un évidement parallélépipédique débouchant sur les faces supérieure et inférieure de Inter-somatic cage has in section an octagonal shape whose internal part is crossed vertically by a parallelepipedal recess opening out on the upper and lower faces of

ladite cage. said cage.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer: The accompanying drawing, given by way of example, will better understand the invention, its characteristics and the benefits it can provide:

Fig. Fig. 1 est une vue de côté représentant une partie des vertè- 1 is a side view showing a portion of the vertebral

bres lombaires de la colonne vertébrale entre lesquelles sont disposées fibers lumbar spine between which are arranged

les cages inter-somatiques suivant l'invention. inter-somatic cages according to the invention.

Fig. Fig. 2 est une vue de face montrant la disposition des cages l'une par rapport à l'autre entre les vertèbres lombaires d'une colonne vertébrale. 2 is a front view showing the arrangement of cages relative to each other between the lumbar vertebrae of a spinal column.

Fig. Fig. 3 est une vue en perspective illustrant la cage inter- 3 is a perspective view illustrating the inter-cage

somatique suivant la présente invention. somatic according to the present invention.

Fig. Fig. 4 est une coupe montrant le profil du trou réalisé entre 4 is a section showing the profile of the hole between

les deux vertèbres à fusionner avant la mise en place de la cage inter- the two vertebrae to be fused prior to the establishment of the inter-cage

somatique. somatic. Fig. Fig. 5 est une coupe représentant la position d'une cage inter-somatique après sa mise en place entre les deux vertèbres lombaires. 5 is a sectional view showing the position of an inter-cage somatic after its establishment between two lumbar vertebrae.

On a représenté en fig. There is shown in Fig. 1 et 2 la partie basse d'une colonne ver- 1 and 2 the lower part of a column ver-

tébrale 1 dont les vertèbres lombaires la sont réunies par l'intermé- tébrale 1 including the lumbar vertebrae are joined by the intermedi-

diaire de deux cages inter-somatiques 2 identiques. diary of two inter-somatic cages 2 identical.

Les cages inter-somatiques 2 sont introduites entre les vertèbres la par la voie postérieure de la colonne vertébrale 1 suivant la flèche F1, c'est-à-dire du côté des épineuses lb. Inter-somatic cages 2 are introduced between the vertebrae by the posterior approach of the spine 1 according to arrow F1, that is to say the side of the spinous lb. Les cages inter-somatiques 2 sont mises en place après le retrait partiel du disque inter-vertébral Inter-somatic cages 2 are put in place after the partial withdrawal of the inter-vertebral disc

1c, comme on le verra mieux plus loin. 1c, as we shall see better further.

En fig. In Fig. 3, on a montré une cage inter-somatique 2 présentant un profil octogonal et dont la partie interne est percée d'un évidement vertical 2a de forme sensiblement paraléllépipédique. 3, there is shown a cross-somatic cage 2 having an octagonal profile and whose inner part is pierced with a vertical recess 2a of substantially paraléllépipédique. L'évidement 2a The recess 2a

débouche du côté des faces supérieure 2b et inférieure 2c de la cage 2. opens the side of the upper face 2b and bottom 2c of the cage 2.

Cette dernière est prévue suivant son axe longitudinal légèrement conique, de manière que les faces supérieure 2b et inférieure 2c soient inclinées l'une par rapport à l'autre, c'est-à-dire qu'elles ne se This latter is provided along its longitudinal axis slightly conical, so that the upper faces 2b and 2c are less inclined with respect to one another, that is to say they do

trouvent pas dans deux plans parallèles. not found in two parallel planes.

La conicité de la cage 2 permet de définir des parois verticales parallèles 2d et 2e de hauteurs différentes, tandis que leur largeur est identique. The taper of the stand 2 to define parallel vertical walls 2d and 2e of different heights, while its width is identical. En effet, les faces verticales 2f et 29 perpendiculaires aux parois 2d et 2e sont prévues parallèles l'une à l'autre dans des plans différents. Indeed, the vertical faces 2f and 29 perpendicular to the walls 2d and 2e are provided parallel to each other in different planes. Les faces 2b et 2c sont reliées respectivement aux faces verticales Faces 2b and 2c are respectively connected to vertical faces

2f et 29 par des pans coupés 2h qui sont inclinés d'un angle à 45 . 2f and 29 by bevels 2h which are inclined at an angle of 45.

La forme avantageuse de la cage inter-somatique 2, c'est-à-dire son profil octogonal conique, permet d'obtenir un greffon 3 monobloc massif présentant un profil identique à celui de l'évidement 2a. The advantageous shape of the inter-cage somatic 2, that is to say its conical octagonal profile, allows to obtain a graft 3 solid piece having a profile identical to that of the recess 2a. Les bords Edges

supérieur 3a et inférieur 3b du greffon 3 sont prévus pour venir respec- upper 3a and lower 3b graft 3 are provided to come respective

tivement affleurer le bord des faces supérieure 2b et inférieure 2c de la cage 2. Ainsi, les bords 3a et 3b sont prévus inclinés suivant le même angle que celui des faces 2b et 2c de la cage 2, tandis que les bords verticaux 3c et 3d sont respectivement parallèles à ceux des faces 2f et 29. Egalement, les bords opposés 3e et 3f sont parallèles l'un à tively flush with the edge of the upper face 2b and bottom 2c of the cage 2. Thus, the edges 3a and 3b are provided inclined at the same angle as that of the surfaces 2b and 2c of the cage 2, while the vertical edges 3c and 3d are respectively parallel to those surfaces 2f and 29. Also, 3e and 3f are opposite edges parallel to

l'autre et perpendiculaires aux bords 3c et 3d. each other and perpendicular to the edges 3c and 3d.

Les greffons 3 à introduire dans les cages 2 sont réalisés dans une matière constituée d'os spongieux provenant soit du patient (autogreffe), soit d'un autre individu (allogreffe). Grafts 3 to be introduced into the cages 2 are made in a material comprised of cancellous bone either from the patient (autologous transplant) or another individual (allogeneic transplant). Egalement, les greffons 3 peuvent être réalisés dans des matières divisées telles que des substituts synthétiques ou analogues, mises en forme avant leur Also, grafts 3 can be made of divided materials such as synthetic analogues or substitutes, shaped before

introduction respective dans Les évidements 2a. respective introduction into the recesses 2a.

En fig. In Fig. 4, on a montré une coupe des vertèbres la et du disque lc de la colonne vertébrale 1 dans lesquels est réalisée une découpe 4 présentant un profil identique à celui de La cage 2. Chaque vertèbre la est constituée dans sa partie centrale d'os spongieux ld recouvert sur sa périphérie d'os cortical le. 4, the disc and lc of the spine 1 has been shown a section of the vertebrae in which is formed a recess 4 having a profile identical to that of the cage 2. Each vertebra is formed in its central portion of cancellous bone ld covered on its periphery cortical bone it. L'os cortical le comporte à promixité du disque 1c des fibres de cartilage lui assurant une structure dure et Cortical bone has at the promixité 1c disk cartilage fibers giving it a hard structure and

résistante. resistant.

Avant de procéder à la découpe 4, le chirurgien retire partielle- Before cutting 4, the surgeon removes partially

ment le disque lc. ment lc drive. La forme de la découpe 4 permet de Libérer sur cha- The shape of the cut 4 frees on Cha-

cune des vertèbres la d'une part une grande surface d'os spongieux ld qui viendra en contact avec le greffon 3 et d'autre part des pans inclinés d'os cortical le permettant de constituer des zones d'appui CUNE vertebrae the one hand a large area of ​​cancellous bone ld which come into contact with the graft 3 and the other of the inclined faces of the cortical bone to form bearing zones

pour la cage inter-somatique 2 dans la partie dure et résistante. for inter-somatic cage 2 in the hard and resistant part.

En outre, la découpe 4 présente un profil conique identique à celui de la cage 2 suivant la profondeur des vertèbres 1l. In addition, the cutout 4 has a conical profile identical to that of the cage 2 according to the depth of the vertebrae 1l. La découpe 4 est réalisée de manière que la base la moins large du cône, c'est-à-dire celle correspondant à la paroi verticale 2d de la cage 2 soit prévu au bord des vertèbres la, tandis que la base la plus large se trouve à 4 cutting is carried out so that the narrowest base of the cone, that is to say that corresponding to the vertical wall 2d of the cage 2 is provided at the edge of the vertebrae, while the wider base is located

l'intérieur de celes-ci et à proximité du disque lc restant. within celes latter and near the remaining lc disk.

Le chirurgien procède ensuite à L'écartement des vertèbres la par voie postérieure (F1) pour permettre L'accès aux cages 2 à l'intérieur de la découpe 4. Une fois les cages 2 introduites dans la découpe 4, le chirurgien retire les écarteurs et on constate que lesdites cages sont The surgeon then proceeds to The spacing of the vertebrae by the posterior route (F1) to permit access to the cages 2 to the inside of the cutout 4. When the cages 2 introduced into the cut-out 4, the surgeon removes the spacers and we note that said cages are

prisonnières entre les vertèbres la du fait de leur conicité et du pro- trapped between the vertebrae due to their taper and pro-

fil de la découpe 4. wire cutting 4.

En fig. In Fig. 5, on a montré une cage inter-somatique 2 prisonnière entre deux vertèbres la et à l'intérieur de laquelle est préalablement 5, there is shown a cross-somatic cage 2 trapped between two vertebrae and the inside of which is previously

introduit le greffon 3. 3 introduces the graft.

On constate que ce dernier est largement en contact avec l'os spon- It is noted that it is largely in contact with the bone spon-

gieux lb de chacune des vertèbres la pour faciliter la fusion ultérieure desdites vertèbres. gious lb of each of the vertebrae to facilitate the subsequent fusing said vertebrae. Les pans coupés 2h de La cage 2 viennent prendre appui contre l'os cortical le dur et résistant de chaque vertèbre la The canted 2h The cage 2 abut against the cortical bone hard and resistant of each vertebra

permettant une bonne résistance mécanique de l'ensemble. allowing good mechanical strength of the whole.

Le matériau de la cage 2 peut être inerte, c'est-à-dire métallique par exemple en titane ou encore résorbable, par exemple en polymère The cage 2 material may be inert, that is to say metal for example titanium or resorbable, polymer e.g.

d'acide lactique. lactic acid.

Il doit d'ailleurs être entendu que La description qui précède n'a It should also be understood that the above description has

été donnée qu'à titre d'exemple et qu'elle ne limite nullement le domai- given as an example and does not limit the domai-

ne de l'invention dont on ne sortirait pas en remplaçant les détails not of the invention which would not be exceeded by replacing the details

d'exécution décrits par tous autres équivalents. execution described by any other equivalents.

Claims (8)

REVENDICATIONS REVENDICATIONS CLAIMS CLAIMS
1. Cage inter-somatique destinée à La fusion ultérieure des vertè- 1. Cage for inter-somatic Subsequent fusion of vertebral
bres lombaires de la colonne vertébrale, caractérisée en ce qu'elle présente en section une forme octogonale dont la partie interne est traversée verticalement par un évidement (2a) dans lequel est introduit un greffon (3), ledit évidement débouchant sur les faces supérieure (2b) fibers lumbar spine, characterized in that it has in section an octagonal shape whose internal part is crossed vertically by a recess (2a) into which is introduced a graft (3), said recess opening onto the upper ( 2b)
et inférieure (2c) de ladite cage (2). and lower (2c) of said cage (2).
2. Cage suivant la revendication 1, caractérisée en ce que les faces supérieure (2b) et inférieure (2c) sont inclinées suivant l'axe 2. Cage according to Claim 1, characterized in that the upper sides (2b) and lower (2c) are inclined along the axis
longitudinal de la cage (2) pour qu'elle présente un profil conique. longitudinal of the cage (2) so that it has a conical profile.
3. Cage suivant la revendication 2, caractérisée en ce qu'elle comprend des faces verticales parallèLes (2f et 2G) qui sont reliées aux 3. Cage according to claim 2, characterized in that it comprises vertical parallel faces (2f and 2g) which are connected to
faces supérieure (2b) et inférieure (2c) par des pans coupés (2h). upper (2b) and lower (2c) by bevels (2h).
4. Cage suivant la revendication 3, caractérisée en ce qu'elle comprend des parois verticales (2d et 2e) perpendiculaires aux faces verticales (2f et 2G) et qui sont prévues de même Largeur mais d'une 4. Cage according to claim 3, characterized in that it comprises vertical walls (2d and 2e) perpendicular to the vertical faces (2f and 2g) and which are provided for the same width but a
hauteur différente. different height.
5. Cage suivant la revendication 1, caractérisée en ce que le gref- 5. Cage according to claim 1, characterized in that the gref-
fon (3) présente la même forme géométrique que l'évidement (2a) ménagé à his (3) has the same geometrical shape as the recess (2a) formed
l'intérieur de la cage (2). within the cage (2).
6. Cage suivant la revendication 3, caractérisée en ce que les pans 6. A cage according to claim 3, characterized in that the flaps
coupés (2h) sont inclinés d'un angle de 45 . cut (2h) are inclined at an angle of 45.
7. Cage suivant la revendication 1, caractérisée en ce qu'elle est 7. Cage according to Claim 1, characterized in that it is
réalisée dans un matériau inerte tel que du métal ou du titane. performed in an inert material such as metal or titanium.
8. Cage suivant la revendication 1, caractérisée en ce qu'elle est 8. Cage according to Claim 1, characterized in that it is
réalisée dans un polymère d'acide lactique résorbable. made of a resorbable polymer of lactic acid.
FR9405188A 1994-04-25 1994-04-25 Inter-cage somatic for lumbar intervertebral arthrodesis of a spinal column. Expired - Fee Related FR2718955B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9405188A FR2718955B1 (en) 1994-04-25 1994-04-25 Inter-cage somatic for lumbar intervertebral arthrodesis of a spinal column.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9405188A FR2718955B1 (en) 1994-04-25 1994-04-25 Inter-cage somatic for lumbar intervertebral arthrodesis of a spinal column.

Publications (2)

Publication Number Publication Date
FR2718955A1 true FR2718955A1 (en) 1995-10-27
FR2718955B1 FR2718955B1 (en) 1996-08-02

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
FR2794362A1 (en) * 1999-06-02 2000-12-08 Henry Graf Intervertebral implant and installation assembly of such an implant
FR2798059A1 (en) * 1999-09-08 2001-03-09 Phusis interbody implant means for stabilizing the spine and kit for the realization of an arthrodesis
EP1138285A1 (en) * 2000-03-29 2001-10-04 Implant Design AG Spinal cage for insertion between the vertebraes of the spine
WO2006009452A2 (en) * 2004-07-23 2006-01-26 Technologiestichting Stw Bioresorbable bone implant
US8449613B2 (en) 1997-04-25 2013-05-28 Stryker France Two part intersomatic implant

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WO1987007827A1 (en) * 1986-06-19 1987-12-30 S + G Implants Gmbh Implant for securing two adjacent vertebrae
US4743256A (en) * 1985-10-04 1988-05-10 Brantigan John W Surgical prosthetic implant facilitating vertebral interbody fusion and method
EP0307241A2 (en) * 1987-09-11 1989-03-15 John W. Brantigan Surgical prosthetic implant
WO1990000037A1 (en) * 1988-06-28 1990-01-11 Michelson Gary K Artificial spinal fusion implants
EP0493698A1 (en) * 1990-12-19 1992-07-08 Anton Prof. Dr. Härle Bone replacement
WO1992014423A1 (en) * 1991-02-22 1992-09-03 Pisharodi Madhavan Middle expandable intervertebral disk implant and method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4743256A (en) * 1985-10-04 1988-05-10 Brantigan John W Surgical prosthetic implant facilitating vertebral interbody fusion and method
WO1987007827A1 (en) * 1986-06-19 1987-12-30 S + G Implants Gmbh Implant for securing two adjacent vertebrae
EP0307241A2 (en) * 1987-09-11 1989-03-15 John W. Brantigan Surgical prosthetic implant
WO1990000037A1 (en) * 1988-06-28 1990-01-11 Michelson Gary K Artificial spinal fusion implants
EP0493698A1 (en) * 1990-12-19 1992-07-08 Anton Prof. Dr. Härle Bone replacement
WO1992014423A1 (en) * 1991-02-22 1992-09-03 Pisharodi Madhavan Middle expandable intervertebral disk implant and method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8449613B2 (en) 1997-04-25 2013-05-28 Stryker France Two part intersomatic implant
US8840666B2 (en) 1997-04-25 2014-09-23 Stryker France Two part intersomatic implant
FR2794362A1 (en) * 1999-06-02 2000-12-08 Henry Graf Intervertebral implant and installation assembly of such an implant
WO2000074605A1 (en) * 1999-06-02 2000-12-14 Henry Graf Intervertebral implant and assembly for setting same
EP1082950A1 (en) * 1999-09-08 2001-03-14 Phusis Intersomatic implant, device for stabilizing the spine and kit for vertebral interbody fusion
FR2798059A1 (en) * 1999-09-08 2001-03-09 Phusis interbody implant means for stabilizing the spine and kit for the realization of an arthrodesis
EP1138285A1 (en) * 2000-03-29 2001-10-04 Implant Design AG Spinal cage for insertion between the vertebraes of the spine
WO2006009452A2 (en) * 2004-07-23 2006-01-26 Technologiestichting Stw Bioresorbable bone implant
WO2006009452A3 (en) * 2004-07-23 2006-03-09 Martinus Nicolaas Helder Bioresorbable bone implant

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