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Publication numberUS20050203625 A1
Publication typeApplication
Application numberUS 10/798,145
Publication dateSep 15, 2005
Filing dateMar 11, 2004
Priority dateNov 13, 2000
Also published asCA2428546A1, EP1333764A2, US8080041, US20080294171, WO2002038062A2, WO2002038062A3, WO2002038062A9
Publication number10798145, 798145, US 2005/0203625 A1, US 2005/203625 A1, US 20050203625 A1, US 20050203625A1, US 2005203625 A1, US 2005203625A1, US-A1-20050203625, US-A1-2005203625, US2005/0203625A1, US2005/203625A1, US20050203625 A1, US20050203625A1, US2005203625 A1, US2005203625A1
InventorsFrank Boehm, Benedena Melnick
Original AssigneeBoehm Frank H.Jr., Melnick Benedena D.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Device and method for lumbar interbody fusion
US 20050203625 A1
Abstract
A method for performing percutaneous interbody fusion is disclosed. The method includes the steps of inserting a guide needle posteriorly to the disc space, inserting a dilator having an inner diameter slightly larger than the outer diameter of the guide needle over the guide needle to the disc space to enlarge the disc space, and successively passing a series of dilators, each having an inner diameter slightly larger than the outer diameter of the previous dilator, over the previous dilator to the disc space the gradually and incrementally increase the height of the disc space. Once the desired disc height is achieved, the guide needle and all the dilators, with the exception of the outermost dilator, are removed. An expandible intervertebral disc spacer is then passed through the remaining dilator and positioned in the disc space. Th disc spacer is expanded to the required disc height, and then a bone matrix is passed through the dilator to fill the disc space. The dilator is then removed. An expandible intervertebral disc spacer is also disclosed, having a tapered bore that causes greater expansion of one end of the spacer with respect to the other. A kit for performing the percutaneous interbody fusion procedure is also disclosed.
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Claims(20)
1. A method for performing a percutaneous interbody fusion procedure following a percutaneous discectomy procedure, comprising the steps of:
inserting a guide needle through an incision in a patient's body to a position in the disc space between a first and second vertebra;
inserting a dilator over the guide needle to enlarge the disc space to a first desired height;
removing the needle from the dilator;
inserting an expandible intervertebral disc spacer into the disc space through the dilator;
expanding the disc spacer to enlarge the disc space to a second desired height;
inserting a bone matrix compound into the disc space through the dilator;
removing the dilator and
closing the incision.
2. The method of claim 1, wherein the guide needle, the dilator, the disc spacer, and the bone matrix compound are inserted posteriorly of the spine of the patient.
3. The method of claim 1, wherein the steps of inserting the guide needle, the dilator, and the disc spacer are observed under imaging techniques including fluoroscopy.
4. The method of claim 1, wherein an inner diameter of the dilator is slightly larger than an outer diameter of the guide needle.
5. The method of claim 4, further comprising the step of successively inserting a plurality of dilators over a previous dilator to enlarge the disc space to the first desired height.
6. The method of claim 5, wherein each successive dilator has an inner diameter that is slightly larger than an outer diameter of a previous dilator.
7. A method for performing a percutaneous interbody fusion procedure after removal of a disc, comprising the steps of:
inserting a guide needle through an incision in the patient's body to a position in the disc space between a first and second vertebra on a first lateral side if the patient's spine;
inserting a first dilator having an inner diameter that is slightly larger than an outer diameter of the guide needle over the guide needle to the disc space to enlarge the disc space;
determining if the disc space is at a first desired height;
if the disc space is not at the first desired height, successively inserting a plurality of dilators over the first dilator and guide needle, each successive dilator having an inner diameter that is slightly larger than an outer diameter of a previous dilator to enlarge the disc space to the desired first height;
if the disc space is at the first desired height, removing the guide needle and each dilator except for an outermost dilator;
inserting an expandible intervertebral disc spacer through the dilator to the disc space;
expanding the disc spacer to enlarge the disc space to a second desired height;
inserting a bone matrix compound through the dilator to the disc space;
removing the dilator; and
closing the incision.
8. The method of claim 7, further comprising repeating each step in the disc space on a second lateral side of the patient's spine.
9. The method of claim 8, wherein the guide needle, the dilators, the disc spacer and the bone matrix compound are inserted posteriorly of the spine.
10. The method of claim 8, wherein the step of expanding the disc spacer enlarges an anterior side of the disc space a greater distance than the posterior side of the disc space to restore lordosis.
11. An expandible intervertebral disc spacer for implantation in a disc space to enlarge the height of the disc space and restore lordosis in a spine of a patient during interbody fusion procedures, comprising:
a top portion having an inner surface and an outer surface, and having a first end and a second end;
a bottom portion having an inner surface and an outer surface, and having a first end and a second end, the inner surface of the bottom portion facing the inner surface of the top portion;
a plurality of pins joining the top portion to the bottom portion to permit vertical movement of the top portion with respect to the bottom portion;
the inner surface of the top portion and the inner surface of the bottom portion defining a tapered bore having a diameter at a first end that is greater than a diameter at a second end; and
a rod for insertion into the tapered bore to expand a distance between the top portion and the bottom portion, the second end of the top portion moving a greater distance with respect to the second end of the bottom portion than the first end.
12. The disc spacer of claim 11, wherein the tapered bore is threaded along at least a portion of its length.
13. The disc spacer of claim 12, wherein the rod is threaded.
14. The disc spacer of claim 11, wherein the top portion and bottom portion are constructed of bone material.
15. The disc spacer of claim 11, wherein the outer surface of the top portion and the outer surface of the bottom portion are scored to enhance adherence to vertebra of the spine.
16. A kit for performing percutaneous interbody fusion surgical procedures, comprising:
at least one expandible intervertebral disc spacer;
at least one guide needle;
a plurality of dilators, a first dilator having an inner diameter that is slightly larger than an outer diameter of the guide needle, and each dilator having an inner diameter successively larger than an outer diameter of a previous dilator; and
a package including a top cover and a bottom cover, the top cover and the bottom cover forming a package containing the at least one disc spacer, the at least one guide needle, and the plurality of dilators.
17. The kit of claim 16, further comprising a tool for delivering the at least one disc spacer through one of the dilators to an intervertebral disc space.
18. The kit of claim 17, further comprising a bone matrix material.
19. The kit of claim 16, wherein the package is sterilized after assembly.
20. An expandible intervertebral disc spacer, comprising:
a split cylinder having a top half and a bottom half joined by a plurality of pins to permit movement of the top half with respect to the bottom half, an inner surface of the top half and an inner surface of the bottom half facing each other defining a tapered bore extending from a first end of the cylinder towards a second end of the cylinder; and
a piston screw insertable into the tapered bore to expand the cylinder by moving the top half away from the bottom half;
wherein the piston screw moving into the taperd bore causes the second end of the cylinder to expand a greater distance than the first end.
Description
    BACKGROUND OF THE INVENTION
  • [0001]
    1. Field of the Invention
  • [0002]
    The present invention relates to a device and method for performing interbody spinal fusion, stabilization and restoration of the disc height in the spine, and in particular to a device and method for performing percutaneous, minimally invasive interbody fusion of the lumbar spine.
  • [0003]
    2. Discussion of the Related Art
  • [0004]
    Many devices exist to assist in maintaining the position of the lumbar vertebra in conjunction with lumbar fusion surgery. Fusion is the joining together of the vertebra of the spine. The underlying concept of the known devices is to maintain the relative position of the vertebral bodies with respect to each other, while the bone that has been placed between the vertebra to form the fusion of the vertebra, has an opportunity to heal and mature. These devices employ different strategies and philosophies, and can include devices which utilize the pedicles, as well as devices which are placed in to the disc space to promote fusion across the disc space. The latter devices and techniques associated with these devices are known as “interbody fusion”. While no single technique has been universally accepted as the most optimum method, there is growing evidence that interbody fusion may be the preferred method.
  • [0005]
    The interbody fusion procedure may be performed via an anterior or posterior approach. Initially, all interbody fusion procedures were accomplished using the posterior approach. The procedure was performed by first performing a laminectomy, removing the disc space, and then packing the disc space with pieces of bone, which were then permitted to heal over time. The hope was that the inserted bone pieces would grow and fuse together with the vertebra above and below that disc space, forming a bridge of bone between the two vertebral bodies, thus accomplishing the interbody fusion.
  • [0006]
    Posterior interbody fusion procedures are accomplished via a variety of techniques. Most procedures attempt to restore proper disc height, i.e. the space between the adjacent vertebra. The patient benefits from restoring the proper disc height, particularly where there has been deterioration, degeneration or collapse of the disc.
  • [0007]
    More recently, the anterior interbody fusion procedure has gained popularity, due to the availability and improvements made in devices that enable the anterior approach for lumbar interbody fusions. These devices typically provide for a retroperitoneal or transperitoneal technique to be used for approaching the lumbar disc, removing some or all of the disc, and placing either bone or a metallic device into the disc space. These devices also typically provide a means for distracting the disc space, i.e. making the space between the discs wider. Presently, this aspect of lumbar interbody fusion procedures are considered to be an important step in the procedure because of its effects on the neural foramina, or areas from which the nerve roots exit through the vertebra. It is generally accepted that enlarging the disc space consequently enlarges the neural foramina, thus decompressing the exiting nerve roots.
  • [0008]
    The current techniques, due to the present equipment available, particularly for anterior interbody fusion, suffer the disadvantage in that they are major surgeries and require large incisions with the manipulation of both tissue and organs. While attempts have been made to perform anterior interbody fusions laparoscopically, these procedures are often complicated and are typically performed under general anesthesia.
  • [0009]
    Therefore, a need exists for a method for performing interbody fusions that reduces the trauma to the patient, and consequently reducing recovery time. A device is also needed to facilitate the interbody fusion procedure to enable the procedure to be performed percutaneously, enabling the surgeon to distract the disc to restore disc height, maintain the distraction, and promote the growth of the bone placed in the disc space between the two vertebral bodies, thus accomplishing the interbody fusion.
  • SUMMARY OF THE INVENTION
  • [0010]
    It is, therefore, an object of the present invention to provide a minimally invasive, percutaneous surgical procedure for performing interbody fusion which reduces the trauma to the patient and reduces recovery time.
  • [0011]
    It is also an object of the present invention to provide a percutaneous interbody fusion procedure which accomplishes the interbody fusion through small incisions in the body of the patient and utilizes a minimum of incisions to complete the procedure.
  • [0012]
    It is a further object of the present invention to provide a device which facilitates the percutaneous interbody fusion procedure.
  • [0013]
    It is yet another object of the present invention to provide a device which distracts the disc space and which may be inserted through a tube to effect the percutaneous interbody fusion procedure.
  • [0014]
    It is a further object of the present invention to provide a collapsible and expandible interbody fusion spacing device that facilitates the percutaneous interbody fusion procedure.
  • [0015]
    It is still a further object of the present invention to provide a kit for performing a minimally invasive percutaneous interbody fusion procedure.
  • [0016]
    The above and other objects of the present invention may be achieved by providing a collapsible and expandible interbody fusion spacer device that may be inserted through a small diameter tube to the disc space that is being fused, so that the procedure may be performed in a minimally invasive manner. The spacer is preferably constructed in two halves that are connected by pins located on the sides of the spacer. The outer surface may be flat to engage the end plate of the vertebra above and below the spacer, and the outer surface may be scored, have ridges, points, tabs, detents, or the like to enhance gripping of the end plates of the vertebra to resist movement of the spacer once it is in place. The interior surfaces of the halves that make up the spacer include a semicircular hollowed portion that is preferably threaded along at least a portion of its length that is aligned with a similar semicircular threaded hollowed portion on the other half of the spacer. When the spacer is assembled, the threaded portion forms a canal for acceptance of a piston screw. Preferably, the threaded canal is tapered from one end to the other, particularly from the end which will be positioned posteriorly in the disc space to the end which will be positioned anteriorly in the disc space. When the piston screw is inserted, the anteriorly positioned end will expand a greater distance in the disc space than the posterior end, due to the tapered threaded canal. This will cause the disc height, i.e. the distance between the vertebra, to be greater anteriorly than posteriorly, which more closely mimics the natural curve of the spine, particularly in the lumbar spine, thus restoring lordosis, the natural curve of the lumbar spine.
  • [0017]
    A method for performing percutaneous interbody fusion is also provided, in which the disc space is enlarged in the craniocaudal direction following percutaneous discectomy. Following the discectomy, a guide needle is passed through the incision to the disc space between the vertebra. Over the needle, a series of tubularly shaped dilators are passed, with each successive dilator having an inner diameter that is slightly larger than the outer diameter of the dilator that is in place. As each successive dilator is inserted in the disc space, it forces the vertebra apart, increasing the disc space, until a desired height between the vertebra is achieved. Once a desired height is reached, which is only a desired height and not necessarily the maximum height, the outer dilator is left in place, while those inside the outer dilator are removed. The maximum height does not have to be achieved by the dilators because the expandible intervertebral disc spacer of the present invention is then inserted into the disc space through the outer dilator. Once in place, the spacer is expanded to increase the disc height to the maximum distance. After the spacer is in place on one side of the vertebral body, the procedure is repeated on the other side. After the two spacers are in place, a bone matrix, which encourages fusion, is passed through the dilators, filling the space with bone. The dilators are then removed and the procedure is complete.
  • [0018]
    A kit for performing percutaneous interbody fusion is also provided, which includes a plurality of expandible intervertebral disc spacers, which preferably expand the disc space a greater distance anteriorly than posteriorly, at least one dilator for expanding the disc height and having a hollow interior for allowing passage of the disc spacers to the disc space, and a guide needle. A curette for performing percutaneous discectomies may be provided, and a bone matrix for fusing the vertebra together may also be provided.
  • BRIEF DESCRIPTION OF THE DRAWINGS.
  • [0019]
    The above and other objects, features and advantages of the present invention will become more readily apparent from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings, in which:
  • [0020]
    FIG. 1 illustrates a perspective view of an expandible intervertebral disc spacer according to the present invention;
  • [0021]
    FIG. 2 illustrates a side cross-sectional view of the disc spacer of FIG. 1;
  • [0022]
    FIG. 3 illustrates a perspective view of an alternative embodiment of the expandible intervertebral disc spacer of FIG. 1;
  • [0023]
    FIG. 4 illustrates a side cross-sectional view of the disc spacer of FIG. 3;
  • [0024]
    FIG. 5 illustrates diagrammatic view of a dilator system for enlarging the disc height of the vertebra prior to placement of the disc spacer of the present invention between the vertebra;
  • [0025]
    FIG. 6 illustrates a diagrammatic view of the placement procedure of the disc spacer of the present invention;
  • [0026]
    FIG. 7 illustrates a diagrammatic view of the disc spacer in place between the vertebra and in a fully expanded condition to restore the natural curvature of the spine;
  • [0027]
    FIG. 8 illustrates a percutaneous interbody fusion kit according to the present invention; and
  • [0028]
    FIG. 9 illustrates a flow chart of the percutaneous interbody fusion method according to the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • [0029]
    Referring now to the drawings, in which like reference numerals identify similar or identical elements throughout the several views, and inn particular to FIG. 1, there is shown the expandible intervertebral disc spacer device 10 according to the present invention. Preferably, the disc spacer 10 is comprised of two similarly shaped halves 12, 14 that are opposed to each other and loosely connected by pins 16. The outer surface of each half may be scored, as indicted by reference numeral 22, for facilitating adherence to the end plates of the vertebral bodies between which disc spacer 10 is placed. When top half 12 and bottom half 14 are assembled, together they may form a cylinder, a cube, a rectangular box, or any geometric shape that may be split to form two opposed halves. A tapered bore 18 is provided, which has a larger diameter 30 at a first end and a smaller diameter 32 at a second end. Preferably, tapered bore 18 is threaded over at least a portion of its length. While disc spacer 10 is preferably constructed of titanium or other suitable metal alloy, cortical bone may also be used. It is also contemplated that the material of the disc spacer 10, or at least the material of which tapered bore 18 is constructed, is self-tapping so that threads are not needed.
  • [0030]
    Screw 20 is provided for insertion into bore 18 to expand the disc spacer 10. As seen in FIG. 2, pins 16 are located in pin bores 26 which have a larger diameter near the outer surface of disc spacer 10, and a smaller diameter near the interior of the spacer. The change in diameter creates a stop 34 which engages the head 24 of pins 16, to terminate expansion of the spacer 10. When screw 20 is inserted into bore 18, the smaller diameter 32 of the threaded bore causes a greater expansion at the second end than at the first, for reasons which will be described below.
  • [0031]
    FIGS. 3 and 4 illustrate an alternative embodiment of the disc spacer 40 of the present invention. Disc spacer 40 comprises a pair of opposed plates 42, 44 which may be square, rectangular, rhomboidal, trapezoidal, or any suitable geometric shape. Pins 16 loosely hold the plates together, as described above, through pin bores 26, which include larger diameter portion 28 which creates stop 34 to engage the head 24 of pins 16. The outer surface of plates 42, 44 may include ridges 50, detents, scoring or the like to enhance adherence to the end plates of the vertebra Each plate includes a threaded ledge portion 48, which forms a bore for accepting screw 20 when the plates are assembled to form disc spacer 40. Preferably, the threaded portion has a larger diameter at a first end 52 and a smaller diameter at a second end 54, so that there is greater expansion of the spacer at the second end 54 than at first end 52, for reasons which will be described below.
  • [0032]
    FIGS. 5, 6 and 7 illustrate the percutaneous interbody fusion procedure of the present invention, utilizing the expandible intervertebral disc spacer of the present invention. Following a percutaneous discectomy in which the disc between vertebra 64 and 66 is removed, preferably posteriorly, through a small incision, disc space 62 is enlarged using dilator system 60 in the procedure according to the present invention. In the procedure, a guide needle 68 is inserted into the disc space under scanning imaging, preferably fluoroscopy. Once the guide needle 68 is in place in the disc space 62, a series of dilators 70 are inserted over guide needle to enlarge the disc space. A first dilator 72, having an inner diameter that is slightly larger than the outer diameter of guide needle 68 is passed over the guide needle through the incision until it reaches the disc space 62. A second dilator 74, having an inner diameter that is slightly larger than the outer diameter of first dilator 72 is then passed over dilator 72 until it reaches disc space 62. A third dilator 76, a fourth dilator 78 and a fifth dilator 80, each having successively larger inner diameters, are then passed over the previous dilator into the disc space 62. As each dilator enters the disc space, it gradually and incrementally enlarges the height of disc space 62 until the disc space is at a desired height. The desired height does not have to be the maximum required height, since that height may be reached by the expandible disc spacer which will be inserted into the disc space. The number of dilators may of course vary, depending on the height of the disc space desired. The depth to which the dilators are inserted can be monitored in many known ways, such as by fluoroscopy, calibrations on the dilators, a combination of both, or other means.
  • [0033]
    Referring to FIG. 6, once the dilators are in place, and the disc space 62 is at the desired height, the guide needle 68 and all the dilators, with exception of the outermost dilator 80, are removed. Expandible intervertebral disc spacer 10 is the passed through dilator 80 to the disc space 62 by an insertion tool 82. The position of disc spacer 10 is confirmed under fluoroscopy, and either tool 82 or another tool inserted through dilator 80 is used to tighten screw 20. Disc spacer 10 is positioned so that the first end of spacer 10, having the larger diameter 30 of tapered bore 18, is positioned posteriorly, while the second end having smaller diameter 32 of bore 18 is positioned anteriorly. As seen in FIG. 7, when the screw 20 is tightened, the second end, on the anterior side of the spine, opens a distance D2, which is greater than distance D1, which is on the posterior side of the spine. This restores lordosis, or the natural curvature of the spine, particularly in the lumbar region, and relieves the intervertebral foramina and decompresses the nerve roots. Once the disc spacer 10 is in position, bone matrix is passed through the dilator 80 to encourage fusion, to fill the disc space with bone.
  • [0034]
    While the above procedure has been described for only one set of dilators, and for enlarging the disc space for placement of a disc spacer on one side of the disc space 62, it is understood that the procedure is performed on both sides of the disc space to raise the disc height evenly, and that two disc spacers 10 are inserted. After the bone matrix is inserted, the dilators are then removed and the procedure is complete.
  • [0035]
    FIG. 8 illustrates a kit for performing the percutaneous interbody fusion procedure of the present invention. Kit 90 comprises a package having top cover 92 and bottom cover 94, where top cover 92 is preferably formed of plastic having depressions or indentations 96 for holding the instruments packaged therein. Packaged in kit 90 are preferably at least two disc spacers 10, a corresponding number of screws 20, a plurality of dilators 70 and a guide needle 68. Kit 90 is preferably sterilized.
  • [0036]
    FIG. 9 is a flow chart of the method of the present invention. Following a percutaneous discectomy procedure, a guide needle is inserted through the incision at step 100 to the disc space between the vertebral bodies to be fused. The depth to which the guide needle is inserted is observed, preferably through fluoroscopy, in step 102. Once the guide needle is in place, a dilator having an inner diameter that is slightly larger than the outer diameter of the guide needle is passed over the guide needle to the disc space in step 104. The dilator increases the height of the disc space. In step 106, a second dilator is passed over the first dilator, where the second dilator has an inner diameter that is slightly larger than the outer diameter of the first dilator, to further increase or enlarge the disc space. At step 108, the height of the disc space is then observed, preferably through fluoroscopy, to see if it is at the desired height, at step 110. If not, the procedure returns to step 106 and another dilator, having an inner diameter slightly larger than the outer diameter of the previous dilator, is passed over the previous dilator to the disc space. If the disc space is at the desired height, the guide needle and all the dilators, with the exception of the outermost dilator, are removed at step 112. At step 114, an expandible intervertebral disc spacer is inserted through the dilator to the disc space. The position of the disc spacer is adjusted to a proper position at step 116, and then observed, preferably through fluoroscopy, at step 118. If it is determined at step 120 that the disc spacer is not at the correct location, the procedure returns to step 116. If the position is correct, the disc spacer is expanded to enlarge the disc space to a desired height at step 122. If it is determined at step 124 that the space is not at the desired height, the procedure returns to step 122. If the space is at the desired height, the tool is removed at step 126, and a bone matrix is passed down the dilator to the disc space in step 128. Once the bone matrix is in place, the dilator is removed at step 130, and the incision is closed at step 132, ending the procedure.
  • [0037]
    While the invention has been shown and described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and modifications in form and detail may be made therein without departing from the spirit and scope of the invention, as defined by the appended claims.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3747603 *Nov 3, 1971Jul 24, 1973Adler BCervical dilators
US3811449 *Mar 8, 1972May 21, 1974Becton Dickinson CoDilating apparatus and method
US4449532 *Jun 30, 1981May 22, 1984Karl StorzDilator to facilitate endoscope insertion into the body
US4545374 *Sep 3, 1982Oct 8, 1985Jacobson Robert EMethod and instruments for performing a percutaneous lumbar diskectomy
US4573448 *Oct 5, 1983Mar 4, 1986Pilling Co.Method for decompressing herniated intervertebral discs
US4862891 *Mar 14, 1988Sep 5, 1989Canyon Medical ProductsDevice for sequential percutaneous dilation
US4968315 *Feb 8, 1989Nov 6, 1990Mitek Surgical Products, Inc.Suture anchor and suture anchor installation tool
US4994027 *Oct 19, 1989Feb 19, 1991Farrell Edward MPercutaneous femoral bypass system
US5015247 *Jun 13, 1988May 14, 1991Michelson Gary KThreaded spinal implant
US5071410 *Mar 14, 1991Dec 10, 1991Pazell John AArthroscopic surgery system
US5158543 *Oct 30, 1990Oct 27, 1992Lazarus Harrison MLaparoscopic surgical system and method
US5171279 *Mar 17, 1992Dec 15, 1992Danek MedicalMethod for subcutaneous suprafascial pedicular internal fixation
US5312360 *Mar 18, 1993May 17, 1994Innerdyne Medical, Inc.Tension guide and dilator
US5357983 *Jan 4, 1993Oct 25, 1994Danek Medical, Inc.Method for subcutaneous suprafascial pedicular internal fixation
US5484437 *Jun 10, 1993Jan 16, 1996Michelson; Gary K.Apparatus and method of inserting spinal implants
US5496322 *Jul 22, 1994Mar 5, 1996Danek Medical Inc.Method for subcutaneous suprafascial pedicular internal fixation
US5522899 *Jun 7, 1995Jun 4, 1996Sofamor Danek Properties, Inc.Artificial spinal fusion implants
US5609635 *Jun 7, 1995Mar 11, 1997Michelson; Gary K.Lordotic interbody spinal fusion implants
US5665122 *Jan 31, 1995Sep 9, 1997Kambin; ParvizExpandable intervertebral cage and surgical method
US5741253 *Oct 29, 1992Apr 21, 1998Michelson; Gary KarlinMethod for inserting spinal implants
US5752969 *Jun 16, 1994May 19, 1998Sofamor S.N.C.Instrument for the surgical treatment of an intervertebral disc by the anterior route
US5782832 *Oct 1, 1996Jul 21, 1998Surgical Dynamics, Inc.Spinal fusion implant and method of insertion thereof
US5803904 *Oct 28, 1997Sep 8, 1998Mehdizadeh; HamidNerve root retractor and disc space separator
US5817034 *Oct 20, 1995Oct 6, 1998United States Surgical CorporationApparatus and method for removing tissue
US5888228 *Oct 20, 1995Mar 30, 1999Synthes (U.S.A.)Intervertebral implant with cage and rotating element
US5902231 *Oct 24, 1996May 11, 1999Sdgi Holdings, Inc.Devices and methods for percutaneous surgery
US5954671 *Dec 28, 1998Sep 21, 1999O'neill; Michael J.Bone harvesting method and apparatus
US5964781 *Jun 2, 1997Oct 12, 1999General Surgical Innovations, Inc.Skin seal with inflatable membrane
US5984967 *Feb 19, 1996Nov 16, 1999Sdgi Holdings, Inc.Osteogenic fusion devices
US6042582 *May 20, 1998Mar 28, 2000Ray; Charles D.Instrumentation and method for facilitating insertion of spinal implant
US6063121 *Jul 29, 1998May 16, 2000Xavier; RaviVertebral body prosthesis
US6080155 *Feb 27, 1995Jun 27, 2000Michelson; Gary KarlinMethod of inserting and preloading spinal implants
US6080193 *Sep 15, 1998Jun 27, 2000Spinal Concepts, Inc.Adjustable height fusion device
US6083225 *Jul 8, 1997Jul 4, 2000Surgical Dynamics, Inc.Method and instrumentation for implant insertion
US6096038 *Jun 7, 1995Aug 1, 2000Michelson; Gary KarlinApparatus for inserting spinal implants
US6113602 *Mar 26, 1999Sep 5, 2000Sulzer Spine-Tech Inc.Posterior spinal instrument guide and method
US6117174 *Sep 16, 1998Sep 12, 2000Nolan; Wesley A.Spinal implant device
US6126689 *Jul 9, 1999Oct 3, 2000Expanding Concepts, L.L.C.Collapsible and expandable interbody fusion device
US6129763 *Sep 12, 1997Oct 10, 2000Chauvin; Jean-LucExpandable osteosynthesis cage
US6156040 *Jul 30, 1999Dec 5, 2000Sulzer Spine-Tech Inc.Apparatus and method for spinal stablization
US6162170 *Jan 20, 1999Dec 19, 2000Sdgi Holdings, Inc.Devices and methods for percutaneous surgery
US6162192 *May 1, 1998Dec 19, 2000Sub Q, Inc.System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US6197033 *Apr 7, 1999Mar 6, 2001Sdgi Holdings, Inc.Guide sleeve for offset vertebrae
US6200322 *Aug 13, 1999Mar 13, 2001Sdgi Holdings, Inc.Minimal exposure posterior spinal interbody instrumentation and technique
US6213957 *Sep 22, 1998Apr 10, 2001United States Surgical CorporationApparatus and method for removing tissue
US6224595 *Apr 20, 1998May 1, 2001Sofamor Danek Holdings, Inc.Method for inserting a spinal implant
US6224607 *Jan 25, 2000May 1, 2001Gary K. MichelsonInstrumentation and method for creating an intervertebral space for receiving an implant
US6241769 *May 6, 1998Jun 5, 2001Cortek, Inc.Implant for spinal fusion
US6245052 *Jul 8, 1998Jun 12, 2001Innerdyne, Inc.Methods, systems, and kits for implanting articles
US6245072 *Mar 9, 1999Jun 12, 2001Sdgi Holdings, Inc.Methods and instruments for interbody fusion
US6270498 *Jun 7, 1995Aug 7, 2001Gary Karlin MichelsonApparatus for inserting spinal implants
US6375655 *Jan 21, 2000Apr 23, 2002Sdgi Holdings, Inc.Interbody fusion device and method for restoration of normal spinal anatomy
US6395034 *Nov 24, 1999May 28, 2002Loubert SuddabyIntervertebral disc prosthesis
US6419705 *Jun 23, 1999Jul 16, 2002Sulzer Spine-Tech Inc.Expandable fusion device and method
US6436098 *Jan 16, 1996Aug 20, 2002Sofamor Danek Holdings, Inc.Method for inserting spinal implants and for securing a guard to the spine
US6436142 *Jul 6, 1999Aug 20, 2002Phoenix Biomedical Corp.System for stabilizing the vertebral column including deployment instruments and variable expansion inserts therefor
US6454807 *Nov 30, 2000Sep 24, 2002Roger P. JacksonArticulated expandable spinal fusion cage system
US6520907 *Nov 30, 1999Feb 18, 2003Sdgi Holdings, Inc.Methods for accessing the spinal column
US6527734 *Aug 7, 2001Mar 4, 2003Sub-Q, Inc.System and method for facilitating hemostasis of blood vessel punctures with absorbable sponge
US6562046 *Jun 7, 2001May 13, 2003Sdgi Holdings, Inc.Screw delivery system and method
US6565574 *Jan 23, 2001May 20, 2003Gary K. MichelsonDistractor for use in spinal surgery
US6575899 *Oct 20, 2000Jun 10, 2003Sdgi Holdings, Inc.Methods and instruments for endoscopic interbody surgical techniques
US6575979 *Aug 16, 2000Jun 10, 2003Axiamed, Inc.Method and apparatus for providing posterior or anterior trans-sacral access to spinal vertebrae
US6648917 *Oct 17, 2001Nov 18, 2003Medicinelodge, Inc.Adjustable bone fusion implant and method
US6666891 *Nov 13, 2001Dec 23, 2003Frank H. Boehm, Jr.Device and method for lumbar interbody fusion
US6692502 *Jun 24, 1996Feb 17, 2004Janos Paul ErtlProcess and instrumentation for arthroscopic reduction of central and peripheral depression fractures
US20010012950 *Mar 22, 2001Aug 9, 2001Srinivas NishtalaDilation systems and related methods
US20020002360 *Mar 30, 2001Jan 3, 2002Orth Michael J.Methods, systems, and kits for implanting articles
US20020032483 *Jun 4, 2001Mar 14, 2002Nicholson James E.Apparatus and method for spinal fusion using implanted devices
US20020077641 *Nov 17, 2001Jun 20, 2002Michelson Gary KarlinApparatus and method of inserting spinal implants
US20020087152 *Jan 4, 2001Jul 4, 2002Endocare, Inc.Systems and methods for delivering a probe into tissue
US20020107574 *Nov 13, 2001Aug 8, 2002Boehm Frank H.Device and method for lumbar interbody fusion
US20020133128 *Mar 16, 2001Sep 19, 2002Heller Andrew S.Method and apparatus for dilating an orifice in biological tissue
US20020138146 *May 13, 2002Sep 26, 2002Jackson Roger P.Anterior expandable spinal fusion cage system
US20030073998 *Oct 25, 2002Apr 17, 2003Endius IncorporatedMethod of securing vertebrae
US20030083688 *Oct 30, 2001May 1, 2003Simonson Robert E.Configured and sized cannula
US20030083689 *Oct 30, 2001May 1, 2003Simonson Robert E.Non cannulated dilators
US20030139814 *Dec 10, 2002Jul 24, 2003Bryan Donald W.Spinal vertebral implant and methods of insertion
US20030176926 *Feb 12, 2003Sep 18, 2003Boehm Frank H.Device and method for lumbar interbody fusion
US20040010317 *May 7, 2003Jan 15, 2004Gregory LambrechtDevices and method for augmenting a vertebral disc
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7500992 *Oct 5, 2004Mar 10, 2009Kung-Chia LiDistractable body augmenter capable of being planted through a pedicle for vertebral body reconstruction
US7892174Jan 17, 2007Feb 22, 2011Zimmer Spine, Inc.Surgical access system and method of using the same
US8152714Feb 11, 2008Apr 10, 2012Alphatec Spine, Inc.Curviliner spinal access method and device
US8262569Sep 11, 2012Zimmer Spine, Inc.Surgical access system and method of using the same
US8419770 *Jun 2, 2004Apr 16, 2013Gmedelaware 2 LlcSpinal facet implants with mating articulating bearing surface and methods of use
US8685096Aug 23, 2011Apr 1, 2014Amendia, Inc.Lumbar fusion device
US8696708 *Mar 5, 2009Apr 15, 2014DePuy Synthes Products, LLCFacet interference screw
US8986355Jul 11, 2011Mar 24, 2015DePuy Synthes Products, LLCFacet fusion implant
US20050131538 *Jun 2, 2004Jun 16, 2005Alan ChervitzSpinal facet implants with mating articulating bearing surface and methods of use
US20050171541 *Dec 20, 2004Aug 4, 2005Boehm Frank H.Jr.Device for lumbar surgery
US20060085007 *Oct 5, 2004Apr 20, 2006Kung-Chia LiDistractable body augmenter capable of being planted through a pedicle for vertebral body reconstruction
US20080021284 *Jan 17, 2007Jan 24, 2008Zimmer Spine, Inc.Surgical access system and method of using the same
US20080132766 *Dec 5, 2006Jun 5, 2008Zimmer Spine, Inc.Surgical Access System And Method Of Using Same
US20080161650 *Jan 3, 2007Jul 3, 2008Zimmer Spine, Inc.Surgical access system and method of using the same
US20080221586 *Feb 11, 2008Sep 11, 2008Alphatec Spine, Inc.Curviliner spinal access method and device
US20110004247 *Mar 5, 2009Jan 6, 2011Beat LechmannFacet interference screw
US20150230930 *Apr 30, 2015Aug 20, 2015Stryker European Holdings I, LlcExpandable spinal implant apparatus and method of use
Legal Events
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Mar 11, 2008ASAssignment
Owner name: WARSAW ORTHOPEDIC, INC., INDIANA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BOEHM, JR., FRANK H.;MELNICK, BENEDETTA DELORENZO;REEL/FRAME:020636/0444;SIGNING DATES FROM 20080212 TO 20080213