WO2000044318A1 - Implant vertebral intersomatique a introduction sagittale - Google Patents
Implant vertebral intersomatique a introduction sagittale Download PDFInfo
- Publication number
- WO2000044318A1 WO2000044318A1 PCT/FR2000/000176 FR0000176W WO0044318A1 WO 2000044318 A1 WO2000044318 A1 WO 2000044318A1 FR 0000176 W FR0000176 W FR 0000176W WO 0044318 A1 WO0044318 A1 WO 0044318A1
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- WO
- WIPO (PCT)
- Prior art keywords
- sagittal
- cage
- walls
- wall
- implant
- Prior art date
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints 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
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
- A61F2/4455—Joints 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
- A61F2/447—Joints 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 substantially parallelepipedal, e.g. having a rectangular or trapezoidal cross-section
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
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- A61F2/46—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor
- A61F2/4603—Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor for insertion or extraction of endoprosthetic joints or of accessories thereof
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Definitions
- the present invention relates to an interbody implant intended to be inserted into the disc space defined between two adjacent vertebrae in order to restore a suitable intervertebral height and to ensure bone fusion between said adjacent vertebrae.
- the object of the invention is more particularly intended for the restoration of the disc space of the lumbar part of the spine of a patient.
- an intersomatic implant in the state of the art, it is known to insert an intersomatic implant into the disc space defined between two adjacent vertebrae.
- many embodiments of such intersomatic implants have been proposed in the prior art.
- a lumbar interbody implant in the form of a cage comprising two sagittal walls connected together by an anterior transverse wall and a posterior transverse wall. The walls delimit between them an open volume intended to receive a spongy bone material making it possible to favor the bone fusion between the two vertebrae.
- Such an implant has an enlarged end portion giving it a reniform configuration allowing a relatively large bearing surface to be obtained.
- the lower and upper edges of the walls of the cage are provided with notches to ensure its retention, by anchoring in the bone of each adjacent vertebra.
- Such an implant after its introduction in a sagittal direction is designed to avoid its migration both lateral and longitudinal.
- the Applicant had the merit of designing a lumbar interbody implant adapted to offer the possibility of placing it in a position such that it can make it possible to obtain increased stability between two adjacent vertebrae by increasing the support polygon while limiting, well heard, the way first.
- the object of the invention therefore aims to satisfy this need by proposing a lumbar interbody implant intended to be inserted between two adjacent vertebrae by a initially limited route while allowing its positioning in the vicinity of the lateral edges of the vertebrae in order to increasing the lift polygon and, consequently, the stability between said adjacent vertebrae.
- the implant according to the invention is intended to be inserted into the disc space defined between two adjacent vertebrae with a view to the anatomical restoration of the intervertebral space, the implant being in the form of a cage of generally parallelepipedal shape comprising two sagittal walls connected together by at least one anterior transverse wall and a posterior transverse wall, the walls delimiting between them an open volume for bone filling.
- one of the sagittal walls called the external wall of the implant, has:
- an upper rim and a lower rim each arranged to present at least one retention edge extending substantially in the sagittal plane, allowing introduction by a posterior route
- the interbody implant is introduced into the intervertebral space in a direction substantially parallel to the sagittal plane and is designed to be able to be moved laterally, in order to come close to the lateral edges of the vertebrae to allow increasing the support polygon between said two vertebrae.
- the object of the invention finds a particularly advantageous application to be implemented by means of a posterior unilateral route which is more conservative for the patient compared to a wide conventional route initially. Indeed, it can be envisaged to place one or two lumbar interbody implants from a unilateral posterior route while obtaining increased stability between said adjacent vertebrae.
- the installation of such an implant by a unilateral posterior way makes it possible to avoid interrupting the structure of the thorns, to force hard and long the paravertebral muscles and to inflict a circumferential fibrosis.
- Fig. 1 is a perspective view 3 A before of an embodiment of an implant according to the invention.
- Fig. 2 is an opposite perspective VA rear of the implant illustrated in FIG. 1.
- Fig. 3 is a top view of an implant according to the invention.
- Fig. 4 is a front profile view of an implant according to the invention.
- Fig. 5 is a rear profile view of an implant according to the invention.
- Fig. 6 is a view of said lateral side profile, in consideration of the top view of FIG. 3.
- Fig. 7 is a side profile view called upper, in consideration of the top view of FIG. 3.
- Fig. 8 is a side view showing a characteristic detail of an alternative embodiment of the invention.
- Fig. 9 is a top view of an example of placing lumbar interbody implants in a disc space.
- the lumbar interbody implant is in the form of a cage 1 having a generally parallelepiped shape and intended to be inserted in the disc space between two adjacent vertebrae.
- the cage 1 comprises a first sagittal wall 2 called internal, and a second sagittal wall 3, called external, extending substantially parallel to one another and to a plane S, called sagittal or anteroposterior.
- the sagittal walls 2 and 3 are interconnected by a transverse wall, called the posterior wall 4, and by an anterior transverse wall 5 extending parallel to each other and to a vertical transverse plane T perpendicular to the sagittal plane S.
- the cage 1 comprises at least one intermediate transverse wall 6 connected to the sagittal walls 2 and 3 and extending parallel to the transverse walls 4 and 5 and at a distance from the latter.
- the intermediate transverse wall 6 constitutes a median wall with respect to the transverse walls 4 and 5.
- the cage 1 thus internally has two volumes 7 opening onto the upper 8 and lower 9 faces of the cage. Volumes 7 are intended to be filled with cancellous bone intended for interbody fusion.
- the rear transverse wall 4 has a hole 10 possibly threaded opening into the interior of the volume 7. The hole 10 is intended for mounting a tool for gripping and positioning the cage between the vertebrae and then allows , to promote bone fusion.
- each sagittal wall 2, 3 is provided with two passage holes 10 'each communicating with a volume 7.
- the sagittal wall called the external wall 3 has an upper rim 11 and a lower rim 12 extending respectively along the upper 8 and lower 9 faces.
- each rim 11, 12 is arranged to have at least one edge retention 13 extending in a plane parallel to the sagittal plane S, as clearly shown in FIG. 3.
- the cage can be moved in both directions in a so-called sagittal direction represented by the arrows fi and h and which is perpendicular to the transverse plane T.
- the direction of introduction fi opposite direction h is that for which the front transverse wall 5 is located downstream with respect to the rear transverse wall 4.
- the external sagittal wall 3 has an external face 14 arranged to present a conformation 15 of penetration aid allowing a lateral offset of the cage in a direction f 3 in a direction perpendicular to the sagittal plane S and for which the external wall 3 is downstream relative to the internal wall 2.
- This conformation of penetration aid 15 allows lateral movement of the cage in the direction ( 3 to a locking position obtained by the retention edge 13 preventing the lateral recoil of the cage in a direction f 4 opposite to the direction f 3.
- each retention edge 13 produced on the external sagittal wall 3 is extended transversely outwardly, by a conformation 15 of penetration aid constituted, in the example illustrated, by a chamfer, so that said sagittal wall 3 has, along the plane tran sversal T, a frustoconical profile whose small base is formed by the external face of the sagittal wall 3.
- a conformation 15 of penetration aid constituted, in the example illustrated, by a chamfer
- the external face 14 of the external sagittal wall 3 is connected to the transverse walls 4, 5 by fillets 16.
- the internal sagittal wall 2 is connected to the transverse walls 4, 5 by fillets 16 making it possible to have of a cage with rounded corners.
- each retention edge 13 is obtained by bevelling produced in the connecting parts 17 of the transverse walls 4, 5, 6 with the external sagittal wall 3.
- each retention edge 13 is constituted by the upper longitudinal part of the internal face 18 of the external sagittal wall 3 thus forming a tooth, a notch or a protruding border relative to the walls transverse 4, 5, 6.
- the retention edge 13 extends continuously over the entire length of the cage, from the rear wall 4 to the front wall 5. Good Of course, it can be envisaged that the retention edge 13 extends over only part of the length of the cage along one or more sections.
- the external sagittal wall 3 can be arranged to have several retention edges 13 offset between them, each extending in a plane parallel to the sagittal plane S.
- each retention edge 13 can have in the plane sagittal S, a straight or convex profile.
- the cage 1 has symmetry with respect to a median longitudinal plane L perpendicular to the sagittal plane S and to the transverse plane T.
- a cage 1 after turning over along a longitudinal axis, can occupy a symmetrical position with another similar cage.
- each retention edge 13 extends substantially in the upper extreme Pi and lower P 2 extension planes of the walls of the cage.
- the retention edges 13 do not exceed the upper planes Pi and lower P 2 , parallel to the longitudinal plane L and in which extend the extreme edges of the walls 2, 4, 5 or 6.
- each retention edge 13 extends projecting relative to the extreme extension planes lower Pi and upper P 2 of the walls 2, 4, 5 or 6, in order to give the cage a distracting effect during its introduction into the intervertebral space.
- each retention edge 13 extends beyond the edges of the transverse walls 4, 5, 6 and of the internal sagittal wall 2.
- each retention edge 13 is cut locally to delimit at least one, and in the example illustrated, two recesses 20 constituting a stop opposing the recoil of the cage in the sagittal plane according to the direction f 2 (fig. 3 and 7).
- at least one and, in the example illustrated, the anterior 5 and intermediate 6 transverse walls have lower and upper edges 21 each arranged to present at least one abutment or a retention tooth 22 preventing recoil of the cage in the direction f 2 (fig. 3 and 6).
- each retention tooth 22 extends in a transverse plane common to that of extension of a redent 20. As shown more precisely in FIGS.
- each retention tooth 22 is constituted by the upper part of the internal face of the front transverse 5 and intermediate walls 6.
- the edges of the sagittal walls 2, 3, taken between the internal faces of the front transverse walls 5 and intermediate 6, as well as the rim of the intermediate transverse wall 6, are cut obliquely to reveal the retention teeth 22 and the teeth 20, so that the cage has, on this part of its length, a frustoconical profile in the sagittal plane S (fig. 6).
- the rim of the rear transverse wall 4, as well as the rims of the sagittal walls 2, 3 taken between the internal face of the intermediate transverse wall 6 up to the external face of the rear transverse wall 4, are cut according to a plane substantially parallel to the longitudinal plane L, so that the cage has over this part of its length, a substantially rectangular profile in the sagittal plane S.
- each edge 23 of the anterior transverse wall 5 is cut obliquely, so that the profile of this wall in the sagittal plane is frustoconical, the smallest base of which is formed by the external face of the wall 5.
- the transverse walls 4, 5, 6 have different determined heights in the sagittal plane S defining a slope adapted to the physiological lordosis of the intervertebral space.
- the cage 1 according to the invention is intended to be inserted into the disc space E defined between two adjacent vertebrae, one of which Vi has been shown.
- the cage 1 has the particularity of being able to be introduced into the disc space in a direction substantially parallel to its sagittal plane in the fi direction and to be offset laterally in the f3 direction to a locking position in the disc space obtained by the retention edges 13 coming to be anchored in the plates of the vertebrae, preventing the backward movement of the cage in an opposite direction f
- the blocking of the cage 1 in the sagittal plane S in the direction f ⁇ is ensured by the redents 20 and teeth 22, intended to cooperate with the plates of the vertebrae.
- the object of the invention is particularly suitable for allowing lumbar interbody fusion with two cages 1 introduced by a unilateral posterior route.
- Such an implant can therefore be placed in the disc space opposite the approach.
- This cage l' is identical to cage 1 but is simply turned over before its introduction into the disc space. As clearly shown in fig.
- the cages 1, l ' are positioned so that the external sagittal walls 3, 3' are placed on the outside of the plates of the vertebrae. Given the symmetrical positioning of the cage l with respect to the cage 1, the cage l is blocked laterally in the direction f 3 by the retention edges 13 *, while blocking the cage l 'in the sagittal plane S in the direction fi is provided by the redents 20 'and the teeth 22'.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002360562A CA2360562A1 (fr) | 1999-01-26 | 2000-01-26 | Implant vertebral intersomatique a introduction sagittale |
AU21144/00A AU2114400A (en) | 1999-01-26 | 2000-01-26 | Interbody vertebral implant with sagittal insertion |
US09/889,190 US6666889B1 (en) | 1999-01-26 | 2000-01-26 | Intersomatic implant for sagittal insertion and suitable for being offset transversely in the frontal plane |
EP00901180A EP1154740B1 (fr) | 1999-01-26 | 2000-01-26 | Implant vertebral intersomatique a introduction sagittale |
KR1020017009218A KR20020016611A (ko) | 1999-01-26 | 2000-01-26 | 골반의 전두면에서 횡축방향으로 이동시키는데 적합한시상 삽입용 체내 이식물 |
DE60013407T DE60013407T2 (de) | 1999-01-26 | 2000-01-26 | Zwischenkörperliches wirbelimplantat zur sagittalen einführung |
AT00901180T ATE274885T1 (de) | 1999-01-26 | 2000-01-26 | Zwischenkörperliches wirbelimplantat zur sagittalen einführung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR99/00982 | 1999-01-26 | ||
FR9900982A FR2788686B1 (fr) | 1999-01-26 | 1999-01-26 | Implant intersomatique a introduction sagittale apte a un decalage lateral dans le plan frontal |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000044318A1 true WO2000044318A1 (fr) | 2000-08-03 |
Family
ID=9541344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/000176 WO2000044318A1 (fr) | 1999-01-26 | 2000-01-26 | Implant vertebral intersomatique a introduction sagittale |
Country Status (10)
Country | Link |
---|---|
US (1) | US6666889B1 (fr) |
EP (1) | EP1154740B1 (fr) |
KR (1) | KR20020016611A (fr) |
AT (1) | ATE274885T1 (fr) |
AU (1) | AU2114400A (fr) |
CA (1) | CA2360562A1 (fr) |
DE (1) | DE60013407T2 (fr) |
ES (1) | ES2228449T3 (fr) |
FR (1) | FR2788686B1 (fr) |
WO (1) | WO2000044318A1 (fr) |
Cited By (1)
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---|---|---|---|---|
EP1430858A1 (fr) | 2002-12-19 | 2004-06-23 | Co-Ligne AG | Une paire d' implants intersomatiques lombaires et procédé de fusion des corps vertébraux adjacents |
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- 1999-01-26 FR FR9900982A patent/FR2788686B1/fr not_active Expired - Fee Related
-
2000
- 2000-01-26 ES ES00901180T patent/ES2228449T3/es not_active Expired - Lifetime
- 2000-01-26 AU AU21144/00A patent/AU2114400A/en not_active Abandoned
- 2000-01-26 EP EP00901180A patent/EP1154740B1/fr not_active Expired - Lifetime
- 2000-01-26 KR KR1020017009218A patent/KR20020016611A/ko not_active Application Discontinuation
- 2000-01-26 DE DE60013407T patent/DE60013407T2/de not_active Expired - Lifetime
- 2000-01-26 WO PCT/FR2000/000176 patent/WO2000044318A1/fr not_active Application Discontinuation
- 2000-01-26 AT AT00901180T patent/ATE274885T1/de not_active IP Right Cessation
- 2000-01-26 US US09/889,190 patent/US6666889B1/en not_active Expired - Lifetime
- 2000-01-26 CA CA002360562A patent/CA2360562A1/fr not_active Abandoned
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1430858A1 (fr) | 2002-12-19 | 2004-06-23 | Co-Ligne AG | Une paire d' implants intersomatiques lombaires et procédé de fusion des corps vertébraux adjacents |
US6942697B2 (en) | 2002-12-19 | 2005-09-13 | Co-Ligne Ag | Pair of lumbar interbody implants and method of fusing together adjoining vertebrae bodies |
Also Published As
Publication number | Publication date |
---|---|
EP1154740B1 (fr) | 2004-09-01 |
FR2788686A1 (fr) | 2000-07-28 |
EP1154740A1 (fr) | 2001-11-21 |
FR2788686B1 (fr) | 2001-06-08 |
DE60013407T2 (de) | 2005-09-15 |
ATE274885T1 (de) | 2004-09-15 |
CA2360562A1 (fr) | 2000-08-03 |
KR20020016611A (ko) | 2002-03-04 |
AU2114400A (en) | 2000-08-18 |
US6666889B1 (en) | 2003-12-23 |
ES2228449T3 (es) | 2005-04-16 |
DE60013407D1 (de) | 2004-10-07 |
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