|Publication number||US3916907 A|
|Publication date||4 Nov 1975|
|Filing date||21 Jun 1974|
|Priority date||21 Jun 1974|
|Publication number||US 3916907 A, US 3916907A, US-A-3916907, US3916907 A, US3916907A|
|Inventors||Wendell C Peterson|
|Original Assignee||Wendell C Peterson|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (3), Referenced by (164), Classifications (28)|
|External Links: USPTO, USPTO Assignment, Espacenet|
'United States Patent 1191 Peterson SPREADER INSTRUMENT FOR USE IN PERFORMING A SPINAL FUSION  Inventor: Wendell C. Peterson, 7107 Prospect Place, NE., Albuquerque, N. Mex. 87110 22 Filed: June 21,1974
21 Appl. No.: 481,637
 US. Cl. 128/345; 128/20; 81/302;
 Int. Cl. A61M 24/00  Field of Search 128/20, 345, 303 R, 354,
 References Cited UNITED STATES PATENTS 390,561 10/1888 Brown 128/345 544,268 8/1895 Hannes et a1. 81/302 1,170,324 2/1916 Pomerene 128/345 FOREIGN PATENTS OR APPLICATIONS 265,400 12/1927 Italy 128/345 OTHER PUBLICATIONS Lumbar Intervertebral Disc Surgery, Surgery, Nov.
[ Nov. 4, 1975 1952, Vol. 32, No. 5, p. 852.
Primary Examiner-Richard A. Gaudet Assistant Examiner-Henry S. Layton Attomey, Agent, or Firm-Richard A. Bachand [5 7] ABSTRACT A spreader instrument for use in spinal fusion surgery for separating adjacent vertebral bodies having a common bone assembly receiving hole pre-formed therein includes two elongated members pivotally attached intermediate their ends. A pair of partial-circularly shaped plates are attached to the pivoted members, extending outwardly from adjacent opposite free ends of the respective members. The plates are oriented with their concave faces toward each other to be adapted to be inserted into the pre-formed holes within the vertebral bodies. The plates engage the walls of the pre-formed hole in the bodies and spreads or separates the bodies as the members are pivoted, permitting a cylindrically shaped bone assembly to be axially inserted between the semi-circular plates into the hole in the vertebral bodies.
9 Claims, 5 Drawing Figures US. Patent Nov. 4, 1975 FIG.5
SPREADER INSTRUMENT FOR USE IN PERFORMING A SPINAL FUSION BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to surgical instruments, and more particularly to a spreader instrument for use in performing a surgical fusion between adjacent vertebral bodies.
2. Description of the Prior Art In performing the surgical procedure widely known as a spinal fusion, two or more vertebral bodies are fused together by grafting a bone section or a bone assembly made of a plurality of bone sections between each pair of vertebrae to be fused. Although such fusions may be performed either anteriorily or posteriorily, the invention has particular application to the anteriorily performed procedure.
Ordinarily, in performing the operation, when the two vertebral bodies to be fused are reached and exposed, and the area between them is cleaned of the disc and other materials, such as those which may have been extruded from the disc, a hole is drilled along a centerline between the two vertebrae. The hole defines a cylindrical cavity within the vertebrae extending almost to the nerve bundles within the spinal column with each half of the cylindrically shaped hole being located in a respective one of the vertebrae. (The partic ular drilling methods are well known, and therefore are not described herein in detail.) A bone section is then obtained and inserted into the hole to ultimately form aunitary structure with the two vertebrae.
The bone section used for such grafts is commonly obtained either from a leg bone, whereby a single piece may be obtained which is often large enough to suffice as the intervertebral connection, or more frequently, from the patients illium bone. Usually, however, when the illium bone is used for the graft, it is necessary to utilize two or more bone sections to obtain a bone assembly of sufficient largeness to complete the graft. The bone sections are fastened together, generally by a stainless wire passed in a figure 8 pattern through a hole in the bone sections. H
Once the donor bone assembly is prepared, it is inserted into the hole previously formed inthe vertebral bodies by manually manipulating the two bodies and forcing them apart a distance sufficient to easily receive the donor bone assembly, then inserting the assembly and releasing the vertebral bodies to return to their usual position, thereby clamping the bone assembly between them. It can be seen that, at best, separating the vertebral bodies in this manner is difficult and inconvenient, considering especially that the operation is being performed several inches below an anterior incision into the patients stomach area.
To further illustrate the difficulties encountered, in one of the methods for separating the vertebral bodies, the head and feet of the patient are physically pulled in opposite directions, thereby separating, among other things, the vertebrae to be fused. This is inconvenient, and requires the assistance of at least two persons in addition to the surgeon. Special apparatus is also required for fastening to the patient to aid in applying the tractory. For example, one apparatus proposed includes a pair of claw sets, one set being required for each vertebral body. The claws are operated to engage the outside walls of the vertebral bodies, with the claws digging into the vertebral bodies. They are then manipulated to pull the bodies apart to allow the bone section to be inserted.
The fusion portion of the operation is then completed by fixing clamps or staples across the intervertebral space between the two fused vertebrae to keep the vertebrae fixed with respect to each other and to constrain the bone assembly within the hole in which it is disposed. The three bodies, i.e., the two vertebrae and the donor bone assembly are then allowed to heal together to unite into a single bone structure.
SUMMARY OF THE INVENTION In light of the above, it is an object of the invention to provide an instrument for separating or spreading a pair of vertebral bodies to be fused and to permit a donor bone assembly to be inserted into a hole preformed in the vertebrae In accordance with the present invention, a surgical instrument is presented .to separate a pair of adjacent vertebral bodies to be fused, to allow a bone assembly to be inserted into a pre-formed hole therein. The spreader instrument includes two elongated members intermediately pivotally attached to be rotateable each upon the other. At one end of each of the elongated members is a thin, arcuate plate adapted to be inserted into a pre-formed hole in the vertebral bodies to be fused. The plates are mounted about a common axis with their concave sides facing each other. Each plate has a first radius on its inside wall of approximately that of bone assembly to be inserted and a second smaller radius on its outside wall of approximately that of the pre-formed hole in the vertebrae. The plates can then be located within the pre-formed hole to engage its walls, and to enable a bone assembly of slightly larger diameter than the diameter of the pre-formed hole to be inserted into the pre-formed hole without interference.
BRIEF DESCRIPTION OF THE DRAWING A preferred embodiment of the invention is illustrated in the accompanying drawing wherein:
FIG. 1 is a perspective view of the two vertebral bodies which have been prepared for insertion of a bone assembly therebetween.
FIG. 2 is a perspective view of a typical unitary bone section for insertion between. the vertebral bodies of FIG. 1.
FIG. 3 is a perspective view of a spreader instrument in accordance with a preferred embodiment of the invention, for use in spreadingthe vertebrae of FIG. 1 to enable the bone section of FIG. 2 to be inserted therebetween.
FIG. 4 is a perspective view, partially cut away, showing the arcuately shaped plates of the spreader of FIG. 3.
FIG. 5 is a frontal view of the vertebral bodies of FIG. 1 after completion of the surgical fusion procedure employing the spreader instrument of the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENTS Typically, in the performance of a spinal fusion operation, an incision is made into the patient to expose the vertebral bodies to be fused. An anterior view of a pair of such vertebral bodies 10 and 11 is shown in FIG. 1. During the operation, a common hole 12 having a top portion 13 and bottom portion 14, is formed by wellknown techniques into the vertebrae 10 and 11, after the space 15 between the bodies 10 and 11 has been cleaned and the disc and other matters therebetween removed.
Thereafter, a bone plug or assembly 17, as shown in FIG. 2, is inserted into the previously formed hole 12 defined by the recesses 13 and 14. The cylindrically shaped bone assembly 17 includes two bone sections 18 and 19, obtained, for example, from the illium bone, in a well-known manner. The bone sections 18 and 19 are fastened together by a stainless steel screw 21 or other fastening means, such as a wire or the like (not shown), and are typically made in circular shape, as shown, with a diameter slightly larger than the diameter of the hole 12 of the vertebral bodies 10 and 11. For instance, the diameter of the bone plug 17 can conveniently be /8 of an inch, and the diameter of the hole 12 can be /2 of an inch. Thus, when the bone section 17 is inserted into the hole 12, the corners 25, 26, 27, and 28 of the vertebral bodies and 1 1 tend to cut or bear upon the bone assembly 17, thereby promoting the fusion thereto as well as immobilizing the vertebral bodies and increasing their stability.
To insert the bone assembly 17 into the hole within the vertebral bodies 10 and 11, the spreader instrument 30, in accordance with a preferred embodiment of the invention, as shown in FIG. 3, is employed. The spreader 30 includes two elongated members 31 and 32, which are pivoted with respect to each other about a point 35 intermediate the ends of the members. The members 31 and 32 are arranged so that the extremities do not crisscross at the pivot point 35. That is, the ends upon which the plates 37 and 38 are carried are caused to separate when the opposite, or handle ends 45 and 46 are moved together. At one end of the respective members 31 and 32, arcuate shaped plates 37 and 38 are attached or formed. The plates 37 and 38 may, as shown, be mounted at an angle of perhaps 30 degrees with respect to the members 31 and 32 to ease operation from above the incision.
The rotational position of the plates 37 and 38, as shown by the arrows 42 and 43, is controlled by the handle portion 45 and 46 of the elongated members 31 and 32. A biasing spring 50 is included between the members to urge them toward a normal closed position of the spreader 30. Also, a locking clip or other such device (not shown) may be easily included between the members 45 and 46 to allow the position of the spreader to be maintained at a desired opening angle.
Because the spreader is used in areas having small access thereto, the handle portion, including the elongated members 45 and 46, may be bent slightly along its axis (bend not shown) to ease operation in such areas, for example, to an angle about 30 degrees.
The construction of the arcuate plates 37 and 38 is shown in more detail in FIG. 4. The plates 37 and 38 are of generally frusto-conical sections having bases 52 and 53 extending over a larger arc distance than the tips 55 and 56. Additionally, the inner radius, indicated by the arrows 60 and 61 are made to conform to the radius of the bone plug assembly 17 of FIG. 2. Thus, for example, if the radius of the bone assembly 17 in FIG.
2 is /8 of an inch, the inner radii, indicated by the arrows and 61, are also made of radius equal to A2 of an inch.
On the other hand, the outside radii of the plates 37 and 38 are made to conform to the radius of the hole 12 as defined by the recesses 13 and 14in the vertebral bodies 10 and 11. Thus, if the hole 12 in the vertebral bodies 10 and 11 has a radius of approximately /2 of an inch, the radii indicated by the arrows 63 and 64 will also be of /2 of an inch.
This radius variance between the inner and outer surfaces of the plates 37 and 38 greatly facilitates the use of the spreader, since the surfaces precisely conform to the curves of the vertebral bodies and plug used in connection therewith. Furthermore, the different radii facilitates easy withdrawal of the spreader 30 from within the holes of the vertebral body 10 after the bone assembly 17 has been inserted, since all of the surfaces are conforming, with no corners or other areas of particular contact which might tend to bind.
It should be emphasized that the length of the plates 37 and 38 should be selected to be sufficiently long as to enable the vertebral bodies to be spread upon insertion into the holes 12 and 13 therein, but not so long as to present the possibility of cutting into the spinal cord lying directly beneath the hole 12. It has been found, for example, that a length of approximately of an inch is generally sufficient.
The plates 37 and 38 are oriented upon the members 31 and 32 in a manner such that they are essentially complementary about a common centerline axis when they are separated a distance just sufficient to receive the bone plug or assembly 17. Thus, as the plug 17 is inserted, its centerline axis will coincide with the center of the inside radii of each of the plates 37 and 38. Likewise, in this position, the outside radii of the plates 37 and 38 will each have a radius located at a common endpoint with the other, defining a diameter equal to the desired diameter of the hole 12 to receive the bone plug 17.
In operation, the elongated members 31 and 32 are manipulated by the handles 45 and 46 to spread the plates 37 and 38 within the holes 13 and 14 of the vertebral bodies 10 and 11. The vertebral bodies 10 and 1 1 are thereby spread or separated a distance sufficient to allow the bone assembly 17 to be inserted in the hole area 12. After the bone assembly 17 has been inserted into place, the spreader 30 is removed from the hole 12, and the vertebral bodies 10 and 11 are allowed to recede to their original positions to clamp the bone assembly 17 therebetween.
Finally, as shown in FIG. 5, to complete the surgical fusion, a means to restrain movement between the vertebral bodies 10 and 11 and to constrain the bone assembly 17 within the holes in the vertebral bodies is placed. Such means can conveniently be elongated staples or clamps 61 and 62, which extend across the hole of the vertebral bodies 10 and 11. The staples 61 and 62 are fastened at their respective ends into the vertebral bodies 10 and 11.
The spreader 30, in accordance with the invention, can be made of any suitable material, such as stainless way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention and hereinafter claimed.
What is claimed is:
1. A spreader for separating vertebral bodies having a hole pre-formed therein to receive a cylindrical plug comprising, two pivotally attached elongated members, and two frustro-conically shaped curved plates, each rigidly attached to a respective one of said members, each of said plates having a first outside radius to engage the wall of said hole, and having a second inside radius smaller than said first radius for passing the bone plug, said first and second radii being upon a common center line oriented at an angle of approximately 30 from an axis along said respective elongated member.
2. The spreader of claim 1 further comprising biasing means between said members to urge said plates in a direction toward each other.
3. The spreader of claim 1 wherein said plates are mounted with their centerline axes oriented at an angle with respect to the axis of said members, and are disposed on said elongated members to be symmetrical about a centerline axis with respect to each other when the interior faces of said plates are separated by a distance approximately equal to the diameter of said plug.
4. The spreader of claim 3 wherein the material of which the spreader is formed is stainless steel.
5. A spreader for separating two vertebral bodies having a pre-formed bone plug receiving hole, comprismg:
a pair of elongated members,
pivot means medially interconnecting said pair of elongated members,
a pair of frustro-conically shaped arcuate plates, each rigidly attached to and outstanding from adjacent an end of a respective one of said members, each plate being of inside radius of approximately /s of an inch to pass said bone plug and of outside radius of approximately /2 of an inch to engage one of said vertebral bodies, the center line axis of each of said plates defining an angle of about 30 with respect to the axis of the elongated member upon which it is mounted.
6. The spreader of claim 5 wherein each of said pair of arcuate plates is of approximately of an inch in length.
7. The spreader of claim 5 wherein each of said elongated members are bent at an angle of about 30 upon its axis.
8. The spreader of claim 7 further comprising biasing means between said elongated members normally urging said plates together.
9. The spreader of claim 8 wherein the material of which the spreader is formed is stainless steel.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US390561 *||27 Jun 1888||2 Oct 1888||Dental mouth-opening forceps|
|US544268 *||9 Feb 1796||6 Aug 1895||Bulb or tube stretcher or expander|
|US1170324 *||2 Feb 1912||1 Feb 1916||Myron B Pomerene||Dilating-forceps.|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4068364 *||15 Jan 1976||17 Jan 1978||Tharp Gordon H||Resleeving tool|
|US4367577 *||8 Dec 1980||11 Jan 1983||Muff Nicholas S||Extractor for removing broken tubing tips from catheter hubs|
|US4881525 *||9 Sep 1988||21 Nov 1989||Williams Richard C||Cervical fusion retractor|
|US5167223 *||8 Sep 1989||1 Dec 1992||Tibor Koros||Heart valve retractor and sternum spreader surgical instrument|
|US5176129 *||1 Mar 1991||5 Jan 1993||Tekdyne, Inc.||Self-retaining refractor|
|US5249720 *||1 May 1992||5 Oct 1993||White Allen A||Tool for facilitating application of elastic stockings|
|US5431653 *||6 Jul 1993||11 Jul 1995||Callaway; George H.||Knee joint flexion-gap distraction device|
|US5458029 *||12 Sep 1994||17 Oct 1995||Walsky; Robert S.||Tool for removing the base of a broken light bulb from a socket|
|US5513783 *||26 Oct 1994||7 May 1996||White; Allen A.||Tool for facilitating application of elastic stockings|
|US5599279 *||29 Jan 1996||4 Feb 1997||Gus J. Slotman||Surgical instruments and method useful for endoscopic spinal procedures|
|US5620458 *||16 Mar 1994||15 Apr 1997||United States Surgical Corporation||Surgical instruments useful for endoscopic spinal procedures|
|US5649929 *||10 Jul 1995||22 Jul 1997||Callaway; George Hadley||Knee joint flexion-gap distraction device|
|US5697889 *||5 May 1995||16 Dec 1997||Gus J. Slotman||Surgical instruments useful for endoscopic spinal procedures|
|US5755732 *||11 Feb 1997||26 May 1998||United States Surgical Corporation||Surgical instruments useful for endoscopic spinal procedures|
|US5782832 *||1 Oct 1996||21 Jul 1998||Surgical Dynamics, Inc.||Spinal fusion implant and method of insertion thereof|
|US5885299 *||14 Mar 1996||23 Mar 1999||Surgical Dynamics, Inc.||Apparatus and method for implant insertion|
|US5935151 *||15 Dec 1995||10 Aug 1999||Broughton; Bruce G.||Vertebral distraction pump|
|US5968098 *||22 Oct 1996||19 Oct 1999||Surgical Dynamics, Inc.||Apparatus for fusing adjacent bone structures|
|US6004326 *||10 Sep 1997||21 Dec 1999||United States Surgical||Method and instrumentation for implant insertion|
|US6063088 *||24 Mar 1997||16 May 2000||United States Surgical Corporation||Method and instrumentation for implant insertion|
|US6080155 *||27 Feb 1995||27 Jun 2000||Michelson; Gary Karlin||Method of inserting and preloading spinal implants|
|US6083225 *||8 Jul 1997||4 Jul 2000||Surgical Dynamics, Inc.||Method and instrumentation for implant insertion|
|US6096038 *||7 Jun 1995||1 Aug 2000||Michelson; Gary Karlin||Apparatus for inserting spinal implants|
|US6120503 *||5 Sep 1997||19 Sep 2000||Michelson; Gary Karlin||Apparatus instrumentation, and method for spinal fixation|
|US6123705 *||1 Oct 1996||26 Sep 2000||Sdgi Holdings, Inc.||Interbody spinal fusion implants|
|US6136001 *||31 Jul 1998||24 Oct 2000||Michelson; Gary Karlin||Apparatus and method for linking spinal implants|
|US6149650 *||8 May 1998||21 Nov 2000||Michelson; Gary Karlin||Threaded spinal implant|
|US6190414||31 Oct 1996||20 Feb 2001||Surgical Dynamics Inc.||Apparatus for fusion of adjacent bone structures|
|US6210412||7 Jun 1995||3 Apr 2001||Gary Karlin Michelson||Method for inserting frusto-conical interbody spinal fusion implants|
|US6224595||20 Apr 1998||1 May 2001||Sofamor Danek Holdings, Inc.||Method for inserting a spinal implant|
|US6245072||9 Mar 1999||12 Jun 2001||Sdgi Holdings, Inc.||Methods and instruments for interbody fusion|
|US6261296||1 Oct 1999||17 Jul 2001||Synthes U.S.A.||Spinal disc space distractor|
|US6264656||8 May 1998||24 Jul 2001||Gary Karlin Michelson||Threaded spinal implant|
|US6267763||31 Mar 1999||31 Jul 2001||Surgical Dynamics, Inc.||Method and apparatus for spinal implant insertion|
|US6270498||7 Jun 1995||7 Aug 2001||Gary Karlin Michelson||Apparatus for inserting spinal implants|
|US6364880||2 May 2000||2 Apr 2002||Gary Karlin Michelson||Spinal implant with bone screws|
|US6436098||16 Jan 1996||20 Aug 2002||Sofamor Danek Holdings, Inc.||Method for inserting spinal implants and for securing a guard to the spine|
|US6520967||15 May 2000||18 Feb 2003||Cauthen Research Group, Inc.||Spinal implant insertion instrument for spinal interbody prostheses|
|US6582431||5 Nov 1999||24 Jun 2003||Howmedica Osteonics Corp.||Expandable non-threaded spinal fusion device|
|US6595995||21 Dec 2000||22 Jul 2003||Sdgi Holdings, Inc.||Methods and instruments for interbody fusion|
|US6635086||30 May 2001||21 Oct 2003||Blacksheep Technologies Incorporated||Implant for placement between cervical vertebrae|
|US6712825||14 Jun 2001||30 Mar 2004||Max Aebi||Spinal disc space distractor|
|US6758849||18 Aug 2000||6 Jul 2004||Sdgi Holdings, Inc.||Interbody spinal fusion implants|
|US6764491||15 May 2001||20 Jul 2004||Sdgi Holdings, Inc.||Devices and techniques for a posterior lateral disc space approach|
|US6770074||17 Nov 2001||3 Aug 2004||Gary Karlin Michelson||Apparatus for use in inserting spinal implants|
|US6814737||10 Feb 2003||9 Nov 2004||Cauthen Research Group, Inc.||Spinal implant insertion instrument for spinal interbody prostheses|
|US6830570||23 Oct 2000||14 Dec 2004||Sdgi Holdings, Inc.||Devices and techniques for a posterior lateral disc space approach|
|US6875213||21 Feb 2003||5 Apr 2005||Sdgi Holdings, Inc.||Method of inserting spinal implants with the use of imaging|
|US6899734||23 Mar 2001||31 May 2005||Howmedica Osteonics Corp.||Modular implant for fusing adjacent bone structure|
|US6923810||7 Jun 1995||2 Aug 2005||Gary Karlin Michelson||Frusto-conical interbody spinal fusion implants|
|US6972019||23 Jan 2001||6 Dec 2005||Michelson Gary K||Interbody spinal implant with trailing end adapted to receive bone screws|
|US6981990 *||4 Aug 2003||3 Jan 2006||Cervitech, Inc.||Cervical prosthesis with insertion instrument|
|US7060073||10 Apr 2002||13 Jun 2006||Sdgi Holdings, Inc.||Devices and techniques for a posterior lateral disc space approach|
|US7097647||25 Jan 2003||29 Aug 2006||Christopher Paige Segler||Tarsal joint space distractor|
|US7160304 *||25 Mar 2003||9 Jan 2007||Warsaw Orthopedic, Inc.||Method for preparing a space between adjacent vertebrae to receive an insert|
|US7207991||18 Mar 2002||24 Apr 2007||Warsaw Orthopedic, Inc.||Method for the endoscopic correction of spinal disease|
|US7255698||11 Aug 2003||14 Aug 2007||Warsaw Orthopedic, Inc.||Apparatus and method for anterior spinal stabilization|
|US7264622||24 Oct 2003||4 Sep 2007||Warsaw Orthopedic, Inc.||System for radial bone displacement|
|US7291149||4 Oct 1999||6 Nov 2007||Warsaw Orthopedic, Inc.||Method for inserting interbody spinal fusion implants|
|US7300440||21 May 2003||27 Nov 2007||Warsaw Orthopedic, Inc.||Methods and instruments for interbody fusion|
|US7303584||22 Apr 2005||4 Dec 2007||Howmedica Osteonics Corp.||Modular implant for fusing adjacent bone structure|
|US7326214||9 Aug 2003||5 Feb 2008||Warsaw Orthopedic, Inc.||Bone cutting device having a cutting edge with a non-extending center|
|US7361193||25 Nov 2003||22 Apr 2008||Warsaw Orthopedic, Inc.||Devices and techniques for a posterior lateral disc space approach|
|US7399303||20 Aug 2002||15 Jul 2008||Warsaw Orthopedic, Inc.||Bone cutting device and method for use thereof|
|US7431722||6 Jun 2000||7 Oct 2008||Warsaw Orthopedic, Inc.||Apparatus including a guard member having a passage with a non-circular cross section for providing protected access to the spine|
|US7442209||30 Nov 2005||28 Oct 2008||Warsaw Orthopedic, Inc.||Implant with trailing end adapted to receive bone screws|
|US7452359||7 Jun 1995||18 Nov 2008||Warsaw Orthopedic, Inc.||Apparatus for inserting spinal implants|
|US7481812||26 May 2006||27 Jan 2009||Warsaw Orthopedic, Inc.||Devices and techniques for a posterior lateral disc space approach|
|US7491205||7 Jun 1995||17 Feb 2009||Warsaw Orthopedic, Inc.||Instrumentation for the surgical correction of human thoracic and lumbar spinal disease from the lateral aspect of the spine|
|US7534254||7 Jun 1995||19 May 2009||Warsaw Orthopedic, Inc.||Threaded frusto-conical interbody spinal fusion implants|
|US7569054||8 Nov 2005||4 Aug 2009||Warsaw Orthopedic, Inc.||Tubular member having a passage and opposed bone contacting extensions|
|US7608105||20 Jul 2005||27 Oct 2009||Howmedica Osteonics Corp.||Methods of inserting conically-shaped fusion cages|
|US7611514||14 Feb 2004||3 Nov 2009||Warsaw Orthopedic, Inc.||Spinal interspace shaper|
|US7615052 *||29 Apr 2005||10 Nov 2009||Warsaw Orthopedic, Inc.||Surgical instrument and method|
|US7686805||1 Jul 2004||30 Mar 2010||Warsaw Orthopedic, Inc.||Methods for distraction of a disc space|
|US7691148||19 Mar 2005||6 Apr 2010||Warsaw Orthopedic, Inc.||Frusto-conical spinal implant|
|US7722619||25 Apr 2006||25 May 2010||Warsaw Orthopedic, Inc.||Method of maintaining distraction of a spinal disc space|
|US7794502||28 Oct 2008||14 Sep 2010||Warsaw Orthopedic, Inc.||Implant with openings adapted to receive bone screws|
|US7828800||18 May 2009||9 Nov 2010||Warsaw Orthopedic, Inc.||Threaded frusto-conical interbody spinal fusion implants|
|US7837732||19 Nov 2004||23 Nov 2010||Warsaw Orthopedic, Inc.||Intervertebral body fusion cage with keels and implantation methods|
|US7857818 *||30 Mar 2007||28 Dec 2010||Warsaw Orthopedic, Inc.||Method and apparatus for delivering an intervertebral disc implant|
|US7887565||18 Feb 2006||15 Feb 2011||Warsaw Orthopedic, Inc.||Apparatus and method for sequential distraction|
|US7914530||25 Apr 2006||29 Mar 2011||Warsaw Orthopedic, Inc.||Tissue dilator and method for performing a spinal procedure|
|US7914554||15 Mar 2002||29 Mar 2011||Warsaw Orthopedic, Inc.||Spinal implant containing multiple bone growth promoting materials|
|US7918855||3 Nov 2009||5 Apr 2011||Warsaw Orthopedic, Inc.||Spinal interspace shaper|
|US7935124||7 Aug 2003||3 May 2011||Warsaw Orthopedic, Inc.||Devices and techniques for a posterior lateral disc space approach|
|US7935148||9 Jan 2006||3 May 2011||Warsaw Orthopedic, Inc.||Adjustable insertion device for a vertebral implant|
|US7942933||3 Apr 2010||17 May 2011||Warsaw Orthopedic, Inc.||Frusto-conical spinal implant|
|US7967863||12 Dec 2008||28 Jun 2011||Warsaw Orthopedic, Inc.||Devices and techniques for a posterior lateral disc space approach|
|US7976566||25 Mar 2002||12 Jul 2011||Warsaw Orthopedic, Inc.||Apparatus for insertion into an implantation space|
|US7993347||27 Jul 2000||9 Aug 2011||Warsaw Orthopedic, Inc.||Guard for use in performing human interbody spinal surgery|
|US7998215||12 Dec 2008||16 Aug 2011||Warsaw Orthopedic, Inc.||Devices and techniques for a posterior lateral disc space approach|
|US8057475||9 Nov 2010||15 Nov 2011||Warsaw Orthopedic, Inc.||Threaded interbody spinal fusion implant|
|US8066705 *||21 Feb 2003||29 Nov 2011||Warsaw Orthopedic, Inc.||Instrumentation for the endoscopic correction of spinal disease|
|US8066707||15 Nov 2005||29 Nov 2011||Warsaw Orthopedic, Inc.||Method for preparing a space in bone to receive an insert|
|US8162951||31 Jan 2008||24 Apr 2012||Innomed, Inc.||Femoral tibial spreader with tensor measurement|
|US8167946||14 Sep 2010||1 May 2012||Warsaw Orthopedic, Inc.||Implant with openings adapted to receive bone screws|
|US8226652||14 Nov 2011||24 Jul 2012||Warsaw Orthopedic, Inc.||Threaded frusto-conical spinal implants|
|US8251997||29 Nov 2011||28 Aug 2012||Warsaw Orthopedic, Inc.||Method for inserting an artificial implant between two adjacent vertebrae along a coronal plane|
|US8317794||29 Nov 2011||27 Nov 2012||Warsaw Orthopedic, Inc.||Device for preparing a space in bone to receive an insert|
|US8337559||1 Jun 2010||25 Dec 2012||Globus Medical, Inc.||Expandable vertebral prosthesis|
|US8343188||23 Apr 2012||1 Jan 2013||Warsaw Orthopedic, Inc.||Device and method for locking a screw with a bendable plate portion|
|US8353909||25 Apr 2006||15 Jan 2013||Warsaw Orthopedic, Inc.||Surgical instrument for distracting a spinal disc space|
|US8377063||18 Mar 2011||19 Feb 2013||Warsaw Orthopedic, Inc.||Method for preparing a space in the human spine|
|US8409292||17 May 2011||2 Apr 2013||Warsaw Orthopedic, Inc.||Spinal fusion implant|
|US8491653||4 Oct 2010||23 Jul 2013||Warsaw Orthopedic, Inc.||Intervertebral body fusion cage with keels and implantation methods|
|US8491654||14 Jul 2011||23 Jul 2013||Warsaw Orthopedic Inc.||Devices and techniques for a posterior lateral disc space approach|
|US8668741||1 May 2012||11 Mar 2014||Warsaw Orthopedic, Inc.||Implant with openings adapted to receive bone screws|
|US8679118||23 Jul 2012||25 Mar 2014||Warsaw Orthopedic, Inc.||Spinal implants|
|US8721723||12 Jan 2009||13 May 2014||Globus Medical, Inc.||Expandable vertebral prosthesis|
|US8734447||27 Jun 2000||27 May 2014||Warsaw Orthopedic, Inc.||Apparatus and method of inserting spinal implants|
|US8758344||28 Aug 2012||24 Jun 2014||Warsaw Orthopedic, Inc.||Spinal implant and instruments|
|US8979857||6 Oct 2004||17 Mar 2015||DePuy Synthes Products, LLC||Modular medical tool and connector|
|US9107649||17 May 2011||18 Aug 2015||Warsaw Orothpedic, Inc.||Devices and techniques for a posterior lateral disc space approach|
|US9220609||24 Feb 2010||29 Dec 2015||Spinewelding Ag||Spine stabilization device, and method and kit for its implantation|
|US9610072 *||17 Sep 2014||4 Apr 2017||Apx Opthalmology Ltd.||Iris retractor|
|US9788824 *||3 Apr 2017||17 Oct 2017||Apx Opthalmology Ltd.||Iris retraction method|
|US20020099378 *||25 Mar 2002||25 Jul 2002||Michelson Gary Karlin||Apparatus, instrumentation and method for spinal fixation|
|US20020165550 *||10 Apr 2002||7 Nov 2002||George Frey||Devices and techniques for a posterior lateral disc space approach|
|US20030135220 *||10 Feb 2003||17 Jul 2003||Cauthen Joseph C.||Spinal implant insertion instrument for spinal interbody prostheses|
|US20030187448 *||25 Mar 2003||2 Oct 2003||Michelson Gary K.||Method for preparing a space between adjacent vertebrae to receive an insert|
|US20030195519 *||21 May 2003||16 Oct 2003||Thomas Zdeblick||Methods and instruments for interbody fusion|
|US20040015168 *||13 May 2003||22 Jan 2004||Sulzer Spine-Tech Inc.||Apparatus and method for spinal stabilization|
|US20040030346 *||7 Aug 2003||12 Feb 2004||George Frey||Devices and techniques for a posterior lateral disc space approach|
|US20040117020 *||25 Nov 2003||17 Jun 2004||George Frey||Devices and techniques for a posterior lateral disc space approach|
|US20040147935 *||25 Jan 2003||29 Jul 2004||Christopher Segler||Tarsal Joint Space Distractor|
|US20040162563 *||14 Feb 2004||19 Aug 2004||Michelson Gary K.||Spinal interspace shaper|
|US20050033428 *||4 Aug 2003||10 Feb 2005||Cervitech, Inc.||Cervical prosthesis with insertion instrument|
|US20050177173 *||14 Apr 2005||11 Aug 2005||Max Aebi||Spinal disc space distractor|
|US20050187630 *||22 Apr 2005||25 Aug 2005||Howmedica Osteonics Corp.||Modular implant for fusing adjacent bone structure|
|US20060074432 *||6 Oct 2004||6 Apr 2006||Depuy Spine, Inc.||Modular medical tool and connector|
|US20060079961 *||30 Nov 2005||13 Apr 2006||Michelson Gary K||Implant with trailing end adapted to receive bone screws|
|US20060100633 *||15 Nov 2005||11 May 2006||Michelson Gary K||Method for preparing a space in bone to receive an insert|
|US20060178752 *||3 Apr 2006||10 Aug 2006||Yaccarino Joseph A Iii||Compound bone structure of allograft tissue with threaded fasteners|
|US20060247648 *||29 Apr 2005||2 Nov 2006||Sdgi Holdings, Inc.||Surgical instrument and method|
|US20060264968 *||26 May 2006||23 Nov 2006||George Frey||Devices and techniques for a posterior lateral disc space approach|
|US20070161962 *||9 Jan 2006||12 Jul 2007||Edie Jason A||Device and method for moving fill material to an implant|
|US20070162129 *||9 Jan 2006||12 Jul 2007||Edie Jason A||Adjustable insertion device for a vertebral implant|
|US20090062921 *||28 Oct 2008||5 Mar 2009||Michelson Gary K||Implant with openings adapted to receive bone screws|
|US20090105836 *||12 Dec 2008||23 Apr 2009||George Frey||Devices and techniques for a posterior lateral disc space approach|
|US20090177285 *||12 Dec 2008||9 Jul 2009||George Frey||Devices and techniques for a posterior lateral disc space approach|
|US20090198240 *||31 Jan 2008||6 Aug 2009||Kaufman David L||Femoral Tibial Spreader with Tensor Measurement|
|US20100094299 *||3 Nov 2009||15 Apr 2010||Michelson Gary K||Spinal interspace shaper|
|US20100274358 *||24 Feb 2010||28 Oct 2010||Spinewelding Ag||Spine stabilization device, and method and kit for its implantation|
|US20100298942 *||1 Jun 2010||25 Nov 2010||Noah Hansell||Expandable Vertebral Prosthesis|
|US20110009966 *||14 Sep 2010||13 Jan 2011||Michelson Gary K||Implant with openings adapted to receive bone screws|
|US20110040342 *||21 Oct 2010||17 Feb 2011||Trieu Hai H||Method and apparatus for delivering an intervertebral disc implant|
|US20110154957 *||29 Dec 2009||30 Jun 2011||Wen-Pin Wang||Pliers for chain link|
|US20110172770 *||18 Mar 2011||14 Jul 2011||Michelson Gary K||Method for preparing a space in the human spine|
|US20120232351 *||2 Nov 2010||13 Sep 2012||Ehud Assia||Iris retractor|
|US20150065809 *||17 Sep 2014||5 Mar 2015||Apx Ophthalmology Ltd.||Iris retractor|
|EP0077159A1 *||4 Oct 1982||20 Apr 1983||Brian Norman Atkins||Vertebrae spreader|
|EP0752830A1 *||28 Mar 1995||15 Jan 1997||MICHELSON, Gary Karlin||Apparatus, instrumentation and method for spinal fixation|
|EP0752830A4 *||28 Mar 1995||9 Dec 1998||Michelson Gary K||Apparatus, instrumentation and method for spinal fixation|
|EP1049428A1 *||19 Nov 1999||8 Nov 2000||Musculoskeletal Transplant Foundation||Compound bone structure fabricated from allograft tissue|
|EP1049428A4 *||19 Nov 1999||22 Sep 2004||Musculoskeletal Transplant||Compound bone structure fabricated from allograft tissue|
|EP1148847A1 *||18 Dec 1999||31 Oct 2001||Lifenet||Composite bone graft, method of making and using same|
|EP1148847A4 *||18 Dec 1999||1 Dec 2004||Lifenet||Composite bone graft, method of making and using same|
|EP1808133A1 *||28 Sep 1999||18 Jul 2007||Synthes GmbH||Spinal disc space distractor|
|EP2431007A1 *||18 Dec 1999||21 Mar 2012||Lifenet||Composite bone graft, method of making and using same|
|WO2000019911A3 *||28 Sep 1999||13 Jul 2000||Max Aebi||Spinal disc space distractor|
|WO2000040177A1||18 Dec 1999||13 Jul 2000||Lifenet||Composite bone graft, method of making and using same|
|WO2001028469A3 *||23 Oct 2000||3 Jan 2002||Sdgi Holdings Inc||Devices and techniques for a posterior lateral disc space approach|
|WO2006092488A1 *||28 Feb 2006||8 Sep 2006||Jean Chaignaud||Bipolar forceps with pre-defined automatic clamping for open surgery|
|U.S. Classification||606/90, 81/302, 29/239, 606/86.00R, 600/219|
|International Classification||A61B17/88, A61F2/44, A61B17/28, A61B17/02, A61F2/00, A61F2/28|
|Cooperative Classification||A61B2017/0256, A61F17/00, A61F2002/30433, A61F2230/0069, A61F2002/30225, A61F2250/0063, A61B17/2812, A61F2002/30599, A61F2/442, A61F2/446, A61F2002/2839, A61F2220/0041, A61B17/025|
|European Classification||A61B17/02J, A61F2/44F2, A61B17/28D, A61F17/00|