WO2016144150A1 - Expandable system for intersomatic fusion and method for the use thereof - Google Patents

Expandable system for intersomatic fusion and method for the use thereof Download PDF

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Publication number
WO2016144150A1
WO2016144150A1 PCT/MX2015/000037 MX2015000037W WO2016144150A1 WO 2016144150 A1 WO2016144150 A1 WO 2016144150A1 MX 2015000037 W MX2015000037 W MX 2015000037W WO 2016144150 A1 WO2016144150 A1 WO 2016144150A1
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WO
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Patent type
Prior art keywords
box
platform
lower
upper
rod
Prior art date
Application number
PCT/MX2015/000037
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Spanish (es)
French (fr)
Inventor
Salvador José MARIN
Original Assignee
Marin Salvador José
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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
    • 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
    • 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
    • A61F2/46Special tools or methods for implanting or extracting artificial joints, accessories, bone grafts or substitutes, or particular adaptations therefor

Abstract

The invention relates to a system for intersomatic fusion with mechanisms for preventing unwanted lateral movements between the components thereof, comprising an expandable cage containing two platforms between which there are windows that are elevated by means of a clip for expansion at altitude, said cage being placed in the intervertebral space by means of a fastening part comprising a threaded guide and a series of hollow rods that allow the complete control of movements of the cage.

Description

FUSION SYSTEM RARA you expanded IH SRSOMATICA X METHOD

USE

Field of the Invention

The present invention relates generally to an expandable system for interbody fusion and more specif cally to a system comprising an expandable box, a positioning device and a clip for expansion help locate within the intervertebral space, easily and with minimal invasiveness, the expandable box, said box can then be expanded to inmoviliaar adjacent vertebrae.

Background of the Invention

Surgical fusion of the spine is a widely used method for the treatment of painful segmental instability associated or not to root compression; its goal is to eliminate this instability and, thus, reduce pain and disability that it causes. Can be performed by different surgical techniques, among them, those comprising the use of internal fixation {instrumentation} improved fusion rates and ios clinical results, and its is, they have avoided the need to use an external support rigid after Surgery.

Currently, the two instrumented fusion techniques most used are posterolateral fusion (FPL) with posterior instrumentation pedicuiar isolated and circumferential fusion using posterior instrumentation associated pedicle anterior intersomatic cage. Circumferential fusion was developed to provide a strong attachment of the segments to merge, while maintaining the ability to bear weight and height of the intervertebral space. It also presents the following advantages over Xa FPL graft placement in the vertebral body, subjected to graft to compressive forces, improving bone fusion law olf; the vertebral body receives increased vascular supplement ios posterior elements and this further improve the fusion potential; restoring the ullage discai improves sagittal alignment and achieves indirect foraminal decompression, reducing the pain caused by pre-existing injury; most disk dries, facilitating the formation of tissue healing bone, thereby encouraging the intervertebral fusion ^ Its disadvantages include the increased demand - technique, higher initial cost and the highest rate of complications such as dural damage, neuroiógico damage and device migration.

The evolution of {FI} interbody fusion provides the surgeon with multiple options regarding ai approach, the graft used and internal fixation devices. As interbody ai, boxes may be used titanium, carbon fiber, PEEK, or structural iliac crest graft; of these, the structural iliac crest graft has little bearing capacity and is associated with high rates of displacement or collapse posquirúrgJfco. Inside the boxes for fusion, there are two major groups, the first of said groups is comprised of rigid boxes, which have dimensions preset so, to be implemented, require means separating the space between vertebrae to allow correct positioning, and its main disadvantage increase the risk of damage caused by excessive application of force in order to introduce the device and / or excessive opening of the intersomatic space; the second io group form the expandióles boxes, which have the common feature to vary their height dimensions, allowing thus to be entered in the íntersornético space without applying large forces not being required to perform a preliminary separation between vertebrae .

An example of expandable intersomatic cage is described in US Patent 8308804 B2, which discloses a spinal fusion device comprising a first terminal plate configured to fit within a disc space and engage with a first vertebra and a second endplate configured to fit within the disc space and engages with a second vertebra is, the two separated by a single spacer is located between the first endplate and second endplate and maintains a predetermined distance between the first and second plate plates. The disadvantage of the device described is that the lift is not made uniform by introducing the spacer manner, since said element is wedge-shaped and rises first closest to the site of entry portion, preventing proper placement. Furthermore, care must be taken when entering ai as ai separator be an independent part of the device, if not entered the correct angle, prevents firm fixation device.

Patent OS 6159244 A discloses an expandable intervertebral fusion implant comprising a pair of shells having semi ™ cylindrical coupling surfaces that resist change when the parts are assembled. The shells have pillars teeth provided that allow ratchet between the shells after ios are placed between vertebral members. The pillars are curved and extend from their shells in a non-perpendicular angle so that the resulting implant is tapered, to accommodate between endplates non-parallel bone, keeping the curvature of the spine. This implant has the disadvantage of requiring previous piercing of a channel on the surface of the vertebrae to prevent lateral movement thereof, and further, by having multiple teeth on ios pillars, it can be given if ai not carried out correctly lift device, it remains uneven not align the teeth of the four pillars properly.

The US Patent 6332895 Bl protects an expandable intervertebral implant that includes two separate housings having surfaces corrugated acopiamiento that resist compression and displacement when the parts are distended with a special tool, for installation. The housings include two flat wings that provide a large bearing area against the adjacent vertebral endplates to prevent the implant from sinking in cancellous bone. The disadvantage of the implant is that it is necessary to carry out a groove through the walls of the two adjacent vertebrae to the implant in order to accommodate the arcuate central portion of the two housings. Moreover, the implant also presents the problem that there is no mechanism to prevent horizontal displacement between the two shells, so to take it, ei device would be misplaced and the load of the vertebrae not be distributed evenly.

US 7828849 B2, patent protects a spacer device intervertebrai consisting of three members forming a closed box with two borings eg one of its ends and a third hole in the tip of the opposite end. Ei operation of said device is based on the central sliding member by a laterally applied force, which causes the angled sections of the first and third member are separated from each other, requiring a bolt securement to maintain the device in extended position. The above configuration allows that elements ei device can be removed, as by pressing the bolt mechanism is released, collapsing ios members; however, the presence of a controlling race resort bolt Xa increases complexity of the device and if it loses its rigidity, the device collapses uncontrollably causing serious spinal injuries.

The US 8105382 {B2} and US 8,435,298 (B2), patents protect intervertábrales implants comprising a type device "mechanical jack crank" qu allow adjusting the elevation thereof by a screw which bring together two wedges, which contact with the inclined surfaces of the portions of upper and lower contact device 8 :, thereby permitting to vary at will the height thereof; However if the bolt is not locked, the device tends to be compressed by the forces applied to it.

None of the above documents, described systems interbody fusion, have expandibies boxes elements controlling unwanted transverse movements between the components thereof and much less than ai same time have secure to ensure that the elements remain the distance between the contact surfaces vertebrae thereby preventing its detraction. In addition to this, ios aforementioned devices often require the piercing of channels on the surfaces of the vertebrae to keep them fixed in place and equipment that allow insertion and elevation are very complex, increasing the risk of breakdowns and generating complications in the handling and placement of the interbody cages.

In view of the above problems, e¾iste the need to provide a system for interbody fusion that allows placement expandífoie box safe and easy roañera and further include means securing qtse avoid horizontal sliding between components CAJ to expandable.

Stwaario d © the Invention

In order to overcome the disadvantages of existing systems for interbody fusion, the present invention aims to provide a compact and easy to install system that can be placed within small spaces,

A particular object of the present invention is to provide a system for fusion intersoraática that has a box expandibie with means which prevent the horizontal sliding between the mism cbíitponentes.

Another objective of the present invention is to provide a box intersoraática elements ensuring raising it and at the same time avoid the collapse of height achieved ia.

A . further object of the present invention is to provide a positioning system for intersomatic cage, easy operation and reduced number of elements.

It is also an object of the present invention to provide a system for inter-somatic fusion that can be used in any region of the spine (cervical, thoracic and / or lumbar).

The above objectives as well or other co and advantages of the present invention shall become apparent from the following detailed description thereof.

Description of the Figures of the Invention

Figure 1 is a perspective view of the lower platform expandibie box.

Figure 2 is a perspective view of the upper platform expandibie box.

Figure 3 is a perspective view of the bottom <$ platform and the box and expandibie ia showing location of gates or windows in an oblique position. S

Figure 4 is a perspective view of the lower platform of the box expandibie ia showing location of gates or windows upright.

Figure 5 is a perspective view of the ventral region of the box or ication expandibie showing the threaded hole and the bolts or screws.

Figure 6 is a perspective view of the two clamping pi without the guide rod and the threaded handle.

Figure 7 is a perspective view of the clamping piez with the threaded guide rod and handle.

Figure 8 is a perspective view of the clamp for expansion in the closed position.

Figure 9 is a perspective view of the clamp in the open position for expansion.

Figure 10 is a perspective view ia expandibie box coupled with the rod guide.

Figure 11 is a perspective view of the box with the latch member expandibie coupled to the rod guide without the threaded handle.

Figure 12 is a perspective view of the box expandibie coupled to the latch member secured to the threaded handle.

Figure 13 shows the positioning system for interbody fusion in the intervertebral space using ia latch member.

Figure 14 shows the collapsed box expandibie collected as ia guide rod located in the intervertebral space,

Figure 15 shows the insertion of the clamp to expand into the space between the platforms of the box S expandable.

Figure 16 shows the expansion of the expandable casing by thrust caused by the blades of the expansion clamp,

Figure 17 shows the expandable box with high gates and fixed in the intervertebral space still coupled to the guide rod.

Figure 18 shows the expandable box properly positioned in the intervertebral space,

Figure 19 is a perspective view of the bottom plate of the embodiment with four gates, co gates obliquely.

Figure 20 is a perspective view of the bottom plate of the embodiment with four gates with the gates upright.

Figure 21 shows a section of the expandable box mode with four gates with the gates obliquely.

Figure 22 shows a section d the expandable box mode with four gates with the gates in verticai position,

Figure 23 is a perspective view of the centerpiece in a "double Ί" of expandable casing in its form that increases in height and width,

Figure 24 is a top view of the bottom plate of the box showing the mode expandable increases both height and width.

Figure 25 is a perspective view of the clamp in closed position lateral expansion.

Figure 26 is a perspective view of the clamp in the open position side eKpansxón.

Figure 27 shows the insertion of the lateral expansion clamp bolts on the mode which increases both height and width.

Figure 28 shows the box in expanded mode width increasing in height and width.

Detailed Description of the Invention Technological development object of the present invention is a system for interbody fusion comprising an expandable box height reduced in its folded mode, with means preventing lateral movement between their contact surfaces. Also, the present invention relates to a series of devices for facilitating the placement and lifting of expandable casing into the intersomatic space.

The system for interbody fusion of the present invention comprises an expandable intersomatic cage {A}, a clamping part (B) and an expansion clip (C).

AS {box in turn comprises a lower platform (1) which is a piece of substantially appropriately to fit the contours of the vertebrae {such as rectangular, oval, kidney-shaped, etc.), compact and with a window or hole center (2), roughening the bottom surface of said platform {15, for contacting the endplate cartilage of the inferior vertebrae the intervertebral space, the upper surface of the platform {1} is smooth and it rises four hollow cylinders {3) perpendicular, one at each corner, arranged to receive four cylinders of smaller diameter projecting from an upper platform (5) and grooves {4} adjacent said cylinders. The upper platform (5) is a piece substantially equal to that of the platform bottom (1), compact and with a window or center hole {6}, with a top surface, roughened to contact the endplate cartilage of the superior vertebrae the intervertebral space and a smooth lower surface of the protruding four cylinders (7} perpendicular thereto, one at each corner, arranged to be separated into the four hollow cylinders (3) of larger diameter which rise of the lower platform (i) to allow the gear both platforms (top and bottom} avoiding horizontal displacements therebetween, said cylinders (), grooves (8) adjacent to them and;? gates or windows (9} which are compact rectangular structures with a rectangular central hole also arranged opposite each other almente horizon and perpendicular to the major diameter of the bottom platform, said compos as located at oblique ends ios two side {10} projections on the upper surface of the platform bottom (1) in the direction of its major axis, tai so that the box (A) to be in retracted position, has windows or gates (9) supported oblique with respect to the bottom plate (1) resting on the side projections (10) and, in the expanded position, the windows or doors (9) move from the rest position or oblique with respect to the lower platform Q) to the vertical position, fitting into the grooves (4 8) arranged for this purpose both the lower deck and the upper deck. The presence of multiple windows or holes provided in both the bottom plate (1) and the upper platform (5); and the dampers (9) allows better application of the bone graft into the box (A) in its expanded position and further contacting the graft with the surfaces of the endplates cartilaginous vertebrae, thereby improving the rate interbody fusion.

Moreover box {&) on its ventral face {that is the face that correspond with the ventral side of the spine, once placed), is aligned at its center a threaded hole {11} situated on the platform superior {5) and two bolts or screws {12} on the bottom platform (1).

clamping the piece {8} comprises a hollow upper rod (13) along which a rod or guide (14), two lower rods {15}, two pieces of parallel frame (16} through which run both the rod { 13} as the two rods (15) and a threaded handle (17) standing on one of ends ios distaies guide (14), such that the rod (14} to be threaded into the bore {11 } case (a), serves as a guide for insertion of the hollow rod (13), allowing to align the lower rods (155 with each of the bolts {12} of the bottom plate (15 of the box (a) .

Finally the clamp expansion {C}, comprises a sustained by a piece with two-rings (19) located on the superio surface of a shaft (20}, which serves as a rotation of two arms {hollow {18} rod 21} which continues at its distal end, towards the hollow rod (18) with two blades (22) opening in response to the approach of the arms (21). Said clamp (C), also it has a system insurance (23) as a crosspiece limiting the opening of the blades (22).

In one embodiment of the system (Figures 19 to 22}, both the bottom plate and the top of the box (A) are oval, said box having at least four windows, two on each side of the box, which in each one of their upper ends have side slots for receiving a shaped structure v double T "(25) allowing coordinate the movement of each two windows in order to expand the box uniform and controlled manner. the above described conformation allows increase the effective area of ​​the expandióle box and compressive forces resisted such higher horn which are verified ai place the box in the lumbar region.

In another embodiment of the invention (Figures 23, 24, 2? And 28) housing not only increases its height, but also allows to vary its width. To do this, each of the platforms of the AC to expandable is manufactured in two lateral segments connected by a central segment shaped "double T" (26) having a pair of slides by sliding the two side segments ( right and left), said segments walking distances equivalent to abut with each other ei midline or center of each of the central segment- (26). In this embodiment, the side (10) of the ventral also face projection is divided into two sections, each of which has an associated bolt or screw (12) serves as a binding site for a caliper lateral expansion { D) which is a modification of the clamp to expansion height with the difference that leads the hollow {18} rod and instead of the two blades (22) has two hollow tubular members {24} adapted for receiving ios interior bolts (12) of each of the sections of the ventral lateral projection.

The methodology used to place the system in its final location is as follows;

First, the guide is collected {14} ai hole

{11} of the upper platform of the box {A}; subsequently, the guide (14) is inserted into the hollow upper rod (13) until the end is closer! free it protrudes, taking care to match the lower rods (15) with bolts {12} of the bottom plate; once this is accomplished, it is necessary to ensure the whole firmly by threaded .manija (17). The assembly thus formed can be handled easily and allows for inserting hole reduced in size.

A vz that the box (A) and the latch member (B) are connected firmly, the entire assembly is guided to the intersomatic space through a channel practiced by conventional methods. Once located the box (A) in somatic int space, the threaded handle is removed {17} thereby releasing the latch member (B) to be withdrawn in the opposite direction to insertion. This done, the box (A) is attached only to the guide (14),

Using the hollow rod (18) the clamp expansion (C) is introduced through the same channel used for the insertion of the cage on the guide (14), thus is allowed enter correctly the two blades (22) the space between the lower platform (!) and the top (5) of the box. Once positioned correctly clamp expansion {C}, it is applied was za on both arms {21} towards each other, this relieves the two blades {22} raising the gates, whereby the cage expands height and sits firmly between surfaces of adjacent vertebrae.

In the embodiment in which the box also increases in width, before conducting the lifting of gates necessary input prime or the modified side clamp {D} Expansio. To do so, apply or engage the two hollow tubular members {24} on the two bolts {12} of each of the sections of the lateral projection {10} {as seen in Figure 27}, Once placed caliper in the correct position, proceed to apply force on the arms (215 to bring them closer to each other, thereby causing the separation of the two tubular parts {24} and ios (left and right) side segments platforms case (a), thereby increasing the total width of the intersomatic cage (Figure 285 ·

Claims

REXVTNDICACIONES l. ~ An expandable system for interbody fusion, comprising an expandable housing (A), a jetadora part s (8) and a clamp for expansion {C), wherein the expandable cage (A) comprises a lower platform (1 ) designed pair fit the contours of the vertebrae, with a rough bottom surface contacts the cartilaginous endplate of the lower vertebra of disc space and a smooth upper surface; a window or center hole (2), four hollow cylinders (3) each disposed in each corner perpendicuiarroente said flat upper surface; grooves {4) arranged inane to adjacent hollow cylinders {3}, an upper platform seY) thereof co figuration the lower {1} platform, with a window or central hole (6), with its rough upper surface to contact the cartilaginous endplate of the upper vertebra of .intervertebral space, while its lower surface is smooth and houses four cylinders (7} perpendicular to said surface, arranged one at each corner to be inserted into the hollow cylinders ( 3) corresponding to the bottom (1}; slots {8} disposed adjacent to said cylinders (7), platform! two lateral projections (10) arranged on the upper surface of the lower deck {,} in the sense of major axis, gates or windows (9) with a central hole, arranged horizontally opposite each other and perpendicular to the major diameter of the lower platform {15, in oblique ends of the projections laterale s (10); a hole threaded {11} co practiced on the upper platform (5), in the middle of ia ventral face of the housing (A); two bolts or screws {12} arranged in the lateral projection of the bottom plate {!}; a hollow upper rod (13) and two lower rods (15) arranged in the clamping part (B) and supported by two pieces of parallel {16} frame; a rod or guide (14) positioned within said rod {13}, configured to be received by one end in the threaded {11} hole of the upper platform £ 5} and a threaded {17 handle} on the other extreme; {18} a hollow rod disposed in the expansion clip (C), adapted to receive the guide rod or {14} and held by a two-rings piez.a {19} connected to a shaft 20} {serving co or pivot point for two arms {21} which continue at its end far diredción !, in the hollow {18} rod, two blades {225, said clip (C) an insurance system (23) as crosshead which controls the opening of the blades (22}, tai so that the engageable cylinders {3} and (7} d © the lower platform (1). top (5), gates or windows {9} are oblique with respect to the bottom platform {!), resting on the side projections £ 10} and forming the box (a), while placing the guide (14) of the latch member (B) in the bore {11} of .the box (a), the casing (a) is coupled to the latch member (B) using the hollow rod (13) guide horn to match the lower rods (15} with bolts or screws {12}, ensuring he together firmly by {17} threaded for placement handle and, ea the box is in its fine location! the threaded handle (i?) is removed to separate the workpiece holder "(B) and said guide (14) serves to position the clip expansion (C) in place between the lower platforms (I) and upper (5) allowing raising com oors or windows (9) to the vertical position by opening blades (22} caused by the force applied to the arms (21) / fitting said gates in the lower {4 slots) and above {$) to avoid retraction of the box (a), such that the box (a) once located in its final position due to the presence of multiple windows or holes {2} and {6) located on the lower platform, both ( 1) and the upper platform (5), also in the gate (9) allows better application of the bone graft into the box (a) in its expanded position and further contacting the graft with the plate surfaces cartilaginous vertebrae terminals, thereby improving the rate of spinal fusion.
2. - The system according to claim X, wherein each of the platforms of the box (A) comprising two side segments, one right and one left, connected by a central segment shaped dobie T ^ "{26 } having a pair of sliding on said side segments slide traveling equal distances into abutment with each other in the midline of the central {26 segment} and, the lateral projection of the ventral side is divided into two sections, being associated with each a bolt or screw which serve as binding site d to receive the clip and permit lateral expansion extent of the lateral segment.
3. - The system according to claim 1, further comprising a modified lateral expansion clamp {D) which is a modification of the expansion clip (C), but without the hollow rod {18} and two pieces hollow tubular (24) replacing the S two blades (22) and adapted to receive therein the bolts (12} of each of the sections of the ventral lateral projection.
4. - The system according to any of claims 1 or 2, wherein the shape of las0 platforms box (A) is selected from the group consisting of rectangular, oval or kidney-shaped.
5. - The system according to any of claims 1 or 2, wherein the number of gates or windows (9} is 2 and the number of slots is de5 each platform.
6. - The system according to any of claims io 2, wherein the number of gates or windows {9} is 4 and are forming two groups having between each two of said gates form one en0 structure "double T" ( 25) which is received by lateral grooves at the upper ends of the flaps (9), to coordinate movements of lifting of the box (a) and p the number of slots on each platform is eight.
7. ~ A method for placing the expandable interbody fusion para5 system of any of the preceding claims comprising the steps of; to the dipstick} or {14} guide into the threaded hole (11) of the upper platform (5);
b) introducing the guide (14) within the rod hueca0 (13) of the clamping piece, matching ios bolts (12) with the hollow {15} rods and secure the assembly with the threaded handle (17);
c) introducing the box set and latch member by a channel made by methods known to the intervertebral space, such that Xa lower surface of the bottom plate Q) is in contact with the endplate cartilage of the inferior vertebrae the intervertebral space and the upper surface of the upper platform is {5} contact the cartilaginous plate of the upper vertebra of the intervertebral space;
a) removing the threaded handle (1) and retracting the insertion channel Misino the latch member (B) leaving the guide {i);
eg insert the clip expansion (CJ through practiced channel and enter the guide (14) within the hollow {18} rod until the blades {22} the space between the lower {1} platforms and top are positioned {5};
f) applying force on the arms (21) of {C} clamp towards each other, to cause the opening of the blades {22}, such that the flaps (9) pass from an oblique position relative to the píataforina less than a perpendicular position to expand the box (a), anchoring it to the cartilaginous surfaces of the vertebrae,
8. The method according to claim 7, wherein if each of the platforms of the box (A) is divided into two sections before step e}, further comprising the steps of;
g) introducing through practiced modified clamp lateral expansion channel (D), to match the tubular rods (24) with each of the bolts (12) located in each of the sections of the lateral projection (10) Y;
h) applying force on the arms (21} of the clamp {D} towards each other, to cause the opening of the rods (24), such that the left and right of each of the platforms portions away from each other to increase the width of the box (a).
PCT/MX2015/000037 2015-03-06 2015-03-06 Expandable system for intersomatic fusion and method for the use thereof WO2016144150A1 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998014142A1 (en) * 1996-10-01 1998-04-09 Surgical Dynamics, Inc. Spinal fusion implant and method of insertion thereof
WO2009064787A2 (en) * 2007-11-12 2009-05-22 Synthes (U.S.A.) Adjustable height intervertebral implant
WO2009114381A1 (en) * 2008-03-07 2009-09-17 Synthes Usa, Llc Expandable interbody spacer device
US20100016970A1 (en) * 2008-07-17 2010-01-21 John Kapitan Spinal interbody spacers
US20110130835A1 (en) * 2008-12-10 2011-06-02 Innvotec Surgical, Inc. Adjustable Distraction Cage With Linked Locking Mechanisms
WO2013184946A1 (en) * 2012-06-06 2013-12-12 Medivest, Llc Expandable tissue spacer implant and method of use
US20140249629A1 (en) * 2005-04-12 2014-09-04 Ahmnon D. Moskowitz Zero-profile expandable intervertebral spacer devices for distraction and spinal fusion and a universal tool for their placement and expansion

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998014142A1 (en) * 1996-10-01 1998-04-09 Surgical Dynamics, Inc. Spinal fusion implant and method of insertion thereof
US20140249629A1 (en) * 2005-04-12 2014-09-04 Ahmnon D. Moskowitz Zero-profile expandable intervertebral spacer devices for distraction and spinal fusion and a universal tool for their placement and expansion
WO2009064787A2 (en) * 2007-11-12 2009-05-22 Synthes (U.S.A.) Adjustable height intervertebral implant
WO2009114381A1 (en) * 2008-03-07 2009-09-17 Synthes Usa, Llc Expandable interbody spacer device
US20100016970A1 (en) * 2008-07-17 2010-01-21 John Kapitan Spinal interbody spacers
US20110130835A1 (en) * 2008-12-10 2011-06-02 Innvotec Surgical, Inc. Adjustable Distraction Cage With Linked Locking Mechanisms
WO2013184946A1 (en) * 2012-06-06 2013-12-12 Medivest, Llc Expandable tissue spacer implant and method of use

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