Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS20030208204 A1
Publication typeApplication
Application numberUS 10/406,133
Publication dateNov 6, 2003
Filing dateApr 3, 2003
Priority dateApr 17, 2001
Also published asUS6599290, US20020151899
Publication number10406133, 406133, US 2003/0208204 A1, US 2003/208204 A1, US 20030208204 A1, US 20030208204A1, US 2003208204 A1, US 2003208204A1, US-A1-20030208204, US-A1-2003208204, US2003/0208204A1, US2003/208204A1, US20030208204 A1, US20030208204A1, US2003208204 A1, US2003208204A1
InventorsKirk Bailey, Rui Ferreira
Original AssigneeBailey Kirk J., Ferreira Rui J.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Anterior cervical plating system
US 20030208204 A1
Abstract
An anterior cervical plating system for securing multiple bone segments relative to each other includes a plate member having multiple pairs of nodes. Each node defines a bone screw aperture. Linking segments connect the pairs of nodes to one another. Between adjacent linking segments are elongated viewing windows. The bone screw apertures each include an integral locking mechanism to ensure that the bone screws do not back out of the plate member. The locking mechanisms and the bone screw apertures allow for angular freedom of insertion of the bone screws into a vertebral body or other bone portion.
Images(5)
Previous page
Next page
Claims(20)
What is claimed:
1. A plate member for an anterior cervical plating system, the plate member comprising:
a first pair of nodes having a first node and a second node defining first and second bone screw apertures, respectively, the first and second nodes both being at least partially circular in shape and spaced apart from one another in a first direction;
a second pair of nodes having a third node and a fourth node defining third and fourth bone screw apertures, respectively, the third and fourth nodes both being at least partially circular in shape and spaced apart from one another in the first direction;
a first plurality of linking segments extending in a second direction substantially perpendicular to the first direction and connecting the first and second pairs of nodes, adjacent linking segments defining elongated viewing windows.
2. The plate member for an anterior cervical plating system of claim 1, wherein the plurality of linking segments includes at least three linking segments.
3. The plate member for an anterior cervical plating system of claim 1, further comprising a third pair of nodes having a fifth node and a sixth node defining fifth and sixth bone screw apertures, respectively, the fifth and sixth nodes both being at least partially circular in shape and spaced apart from one another in the first direction; and
a second plurality of linking segments extending in the second direction and connecting the second and third pairs of nodes, adjacent linking segments of the second plurality of linking segments defining elongated viewing windows.
4. The plate member for an anterior cervical plating system of claim 1, wherein the plate member is contoured about a longitudinally extending midline to include a first lateral half oriented at an obtuse angle relative to a second lateral half.
5. A plating system for securing a first portion of bone to a second portion of bone, the plating system comprising:
a plate member defining a plurality of bone screw apertures, at least one of the plurality of bone screw apertures including an annular groove formed in a sidewall portion;
a plurality of bone screws each inserted into an associated bone screw aperture of the plurality of bone screw apertures; and
a locking ring retained in at least one of the plurality of bone screw apertures and operative to prevent backing out of the bone screw inserted in the at least one bone screw aperture, the locking ring including a first radially extending flange disposed in the annular groove of the at least one bone screw aperture and a second radially extending flange upwardly spaced from the first radially extending flange.
6. The plating system for securing a first portion of bone to a second portion of bone of claim 5, wherein the locking ring is resiliently expandable from a retracted state to an expanded state to permit insertion of one of the bone screws into the at least one bone screw aperture.
7. The plating system for securing a first portion of bone to a second portion of bone of claim 6, wherein each bone screw of the plurality of bone screws has a head having a head diameter and further wherein the second radially extending flange defines an upper opening having a first diameter when the locking ring is in the retracted state and a second diameter when the locking ring is in the expanded state, the first diameter being less than the head diameter, the second diameter being greater than the head diameter.
8. The plating system for securing a first portion of bone to a second portion of bone of claim 7, wherein the first radially extending flange defines a lower opening having a third diameter when the locking ring is in the retracted state, the third diameter being greater than the head diameter.
9. The plating system for securing a first portion of bone to a second portion of bone of claim 5, wherein the plurality of bone screws and the plurality of bone screw apertures cooperate to permit universal movement of each of the bone screws relative to the associated bone screw aperture.
10. The plating system for securing a first portion of bone to a second portion of bone of claim 5, wherein the locking ring is a split locking ring.
11. The plating system for securing a first portion of bone to a second portion of bone of claim 9, wherein a head of each of the bone screws includes a partially spherical portion for articulably engaging the plate member.
12. A method of surgically repairing bone with an elongated plate having a plurality of bone screw apertures, the method comprising the steps of:
locating a locking ring in one of the bone screw apertures, the locking ring defining a locking ring opening and being resiliently expandable from a retracted state to an expanded state such that the locking ring opening has a first opening diameter in the retracted state and a second, larger opening diameter in the expanded state;
inserting a bone screw into the one of the bone screw apertures, the bone screw having a head with a head diameter greater than the first opening diameter and less than the second opening diameter; and
removing the bone screw from the one bone screw aperture with a tool having a first drive portion engaging the head of the bone screw and a second drive portion resiliently expanding the locking ring to the expanded state.
13. The method of securing a first bone portion relative to a second bone portion of claim 12, further comprising the step of threadably engaging the head of the at least one bone screw with the first drive portion of the tool.
14. The method of securing a first bone portion relative to a second bone portion of claim 12, further comprising the step of rotating the at least one bone screw with the second drive portion of the tool.
15. A system for surgically repairing bone, the system comprising:
an elongated plate having a plurality of bone screw apertures;
a locking ring disposed in one of the bone screw apertures, the locking ring defining a locking ring opening and being resiliently expandable from a retracted state to an expanded state such that the locking ring opening has a first opening diameter in the retracted state and a second, larger opening diameter in the expanded state;
a bone screw inserted into the one of the bone screw apertures, the bone screw having a head with a diameter greater than the first opening diameter and less than the second opening diameter; and
a tool for removing the bone screw from the one bone screw aperture, the tool having a first drive portion engaging the head of the bone screw and a second drive portion for resiliently expanding the locking ring to the expanded state.
16. The system for surgically repairing bone of claim 15, wherein the first drive portion of the tool threadably engages an internally threaded aperture provided in the head of the bone screw.
17. The system for surgically repairing bone of claim 15, wherein the second drive portion of the tool includes a hollow cylindrical member surrounding the first drive portion.
18. The system for surgically repairing bone of claim 17, wherein the second drive portion includes a tip having a plurality of drive elements for engaging a corresponding number of slots provided in the head of the bone screw.
19. The system for surgically repairing bone of claim 18, wherein the drive elements of the plurality of drive elements are radially spaced about the first drive portion and include outer surfaces on a circle having a diameter substantially equal to the second diameter of the locking ring.
20. The system for surgically repairing bone of claim 15, wherein the first drive portion is independently rotatable relative to the second drive portion.
Description
    FIELD OF THE INVENTION
  • [0001]
    The present invention relates generally to orthopedic surgical procedures, most particularly for use in fixation of the spine. More particularly, the present invention relates to a system for anteriorly fixating the cervical spine. The present invention also pertains to a related method of withdrawing a bone screw from a plate.
  • BACKGROUND OF THE INVENTION
  • [0002]
    In certain orthopedic surgical procedures, it is necessary to secure multiple bones or bone portions relative to each other. For example, in spinal surgeries, the fusion of two or more vertebrae bodies is required to secure a portion of the spinal column in a desired position. This need may be the result of physical trauma from fractures or dislocations, degenerative diseases, or tumors.
  • [0003]
    One such spinal fixation procedure involves the attachment of a prosthesis or plate to the anterior side of the cervical portion of the spine. The procedure requires anteriorly accessing the spine and securing a prosthetic plate to the one or more cervical vertebrae. This allows fusion of the one or more cervical vertebrae in a particular orientation so to facilitate healing or to repair a condition of the patient.
  • [0004]
    Various fusion plates and plating systems are known for anteriorly fusing the cervical spine. While known anterior plating systems have addressed certain requirements associated with the surgical repair of bone, in general, and spinal fusion, particularly, all are associated with limitations. The requirements associated with spinal stability and system reliability over an extended period of use often conflict with the requirements of an easy to use implant. For example, strength requirements for a fusion plate tend to make the plate bulky and adversely effect intra-operative and post-operative viewing of the associate area of the spine. In this regard, the affected region of the cervical spine cannot be easily viewed using MRI or x-ray procedures to verify that the desired fusion of the cervical spine is complete and/or that the alignment of the cervical vertebrae is proper.
  • [0005]
    Additionally, ensuring that bone screws do not loosen over time or back out from the plate tends to complicate implantation of known anterior plating systems. Known locking mechanisms generally ensure that the bone screws placed into the vertebrae through the plating system do not loosen or back out from the plate. When a locking mechanism has been included with known anterior cervical plating systems, it generally incorporates a discrete fastener or other element. As such, an additional surgical step is required. Furthermore, known locking mechanisms do not adequately permit the removal of an associated bone screw when required.
  • [0006]
    Furthermore, known plating systems often do not permit sufficient angular freedom for bone screws relative to a plate. Generally, known plating systems have defined bores through which bone screws are placed at a predefined angle. Therefore, the operating surgeon often does not have freedom to insert the bone screws into the vertebrae as to best fit the anatomy of the individual patient. While some known systems do permit bone screw angulation, they typically are not adapted to be used with an easy to use locking mechanism.
  • [0007]
    It remains desirable in the pertinent art to provide an anterior cervical plating system that addresses the limitations associated with known systems, including but not limited to those limitations discussed above.
  • SUMMARY OF THE INVENTION
  • [0008]
    The present invention relates to plating systems for the fixation of the cervical spine. In particular, the present invention relates to an anteriorly placed plating system for a cervical portion of the spine. According to one aspect, the present invention relates to a locking mechanism for preventing the withdrawal of locking bone screws from a plate after being implanted. The locking mechanism is integral to the plating system and does not require the additional insertion of additional fasteners or other discrete members into the plate after the bone screws have been fastened to the spine. The locking mechanism preferably allows for angular freedom of the bone screws as they are inserted through the plate.
  • [0009]
    In another aspect, the present invention relates to a plate member of a cervical plating system that permits enhanced viewing of an adjacent portion of the spine area intra-operatively and post-operatively the plate member includes a first pair of nodes having a first node and a second node defining first and second bone screw apertures, respectively. The first and second nodes are at least partially circular in shape and spaced apart from one another in a first direction. The plate member additionally includes a second pair of nodes having a third node and a fourth node defining third and fourth bone screw apertures, respectively. The third and fourth nodes are at least partially circular in shape and spaced apart from one another in the first direction. The plate member further includes a first plurality of linking segments extending in a second direction substantially perpendicular to the first direction and connecting the first and second pairs of nodes. Adjacent linking segments define elongated viewing windows.
  • [0010]
    In a further aspect, the present invention relates to a method of surgically repairing bone with an elongated plate having a plurality of bone screw apertures. The method includes the step of locating a locking ring in one of the bone screw apertures. The locking ring defines a locking ring opening and is resiliently expandable from a retracted state to an expanded state such that the locking ring opening has a first opening diameter in the retracted state and a second, larger diameter in the expanded state. The method additionally includes the step of removing the bone screw from the one bone screw aperture with a tool having a first portion engaging the head of the bone screw and a second portion resiliently expanding the locking ring to the expanded state.
  • [0011]
    In yet another aspect, the present invention relates to a system for surgically repairing bone. The system includes an elongated plate having a plurality of bone screw apertures. A locking ring is disposed in one of the bone screw apertures. The locking ring defines a locking ring opening and is resiliently expandable from a retracted state to an expanded state such that the locking ring opening has a first opening diameter in the retracted state and a second, larger diameter in the expanded state. A bone screw is inserted into the one of the bone screw apertures. The bone screw has a head with a diameter greater than the first opening diameter and less than the second opening diameter. The system further includes a tool for removing the bone screw from the one bone screw aperture. The tool has a first portion engaging the head of the bone screw and a second portion for resiliently expanding the locking ring to the expanded state.
  • [0012]
    An advantage of the present invention is to provide an anterior cervical plating system that provides a locking mechanism including a pre-attached locking ring, thereby eliminating the need for discrete locking components.
  • [0013]
    Another advantage of the present invention is to provide an anterior cervical plating system with an integral locking mechanism that maintains a low profile and thereby minimizes interferences with anatomical soft tissue structure.
  • [0014]
    Another advantage of the present invention is to provide an anterior cervical plating system that provides a plate having an open design permitting intra-operative visualization of bone grafts and vertebrae end plates, as well as post-operative visualization of bone graft consolidation and spinal orientation on an anterior/posterior x-ray.
  • [0015]
    Another advantage of the present invention is to provide an anterior cervical plating system that provides a variable angle bone screw permitting approximately 20 of screw angulation.
  • [0016]
    Another advantage of the present invention is to provide a cervical plating system including a predefined angle. Therefore, the plate need not be manually fashioned to fit the spine thereby decreasing surgical time and interference with soft tissue after implantation.
  • [0017]
    Additional advantages and further areas of applicability of the present invention will become apparent from the following detailed description and appended claims. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0018]
    The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
  • [0019]
    [0019]FIG. 1 is a perspective view of an anterior cervical plating system according to the teachings of a preferred embodiment of the present invention, the system illustrated to include a first plate member.
  • [0020]
    [0020]FIG. 2 is a top view of the first plate member of the anterior cervical plating system according to the present invention.
  • [0021]
    [0021]FIG. 3 is an end view of the first plate member of the anterior cervical plating system according to the present invention.
  • [0022]
    [0022]FIG. 4 is a cross-sectional end view of the plating system according to the teachings of a preferred embodiment of the present invention.
  • [0023]
    [0023]FIG. 5 is a top view of a second plate member of the anterior cervical plating system according to the present invention.
  • [0024]
    [0024]FIG. 6 is a perspective view of a third plate member of the anterior cervical plating system according the present invention, the third plate member shown secured to a cervical portion of a spine and further shown operatively associated with a tool for inserting and removing the bone screws.
  • [0025]
    [0025]FIG. 7 is an enlarged side view of the tool shown in FIG. 6.
  • [0026]
    [0026]FIG. 8 is an enlarged view illustrating the details shown in circle 8 identified in FIG. 7.
  • [0027]
    [0027]FIG. 9 is an enlarged end view of the tool taken in the direction of arrow 9 shown in FIG. 8.
  • [0028]
    [0028]FIG. 10 is a cross-sectional view illustrating engagement of the tool with one of the bone screws shown operatively associated with a locking ring.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0029]
    The following description of the preferred embodiment of the present invention will be understood to be merely exemplary in nature and in no way is intended to limit the subject invention, its application, or uses.
  • [0030]
    With initial reference to FIG. 1, a plating system according to the teachings of a preferred embodiment of the present invention is illustrated and generally identified at reference number 10. The embodiment illustrated is specifically intended for use as an anterior cervical plating system. However, it will become apparent to those skilled in the art below that the teachings of the present invention are suitable for other applications in which surgical repair of bone with a plate is desired.
  • [0031]
    With continued reference to FIG. 1 and additional reference to FIGS. 2-4, the anterior plating system 10 according to the preferred embodiment of the present invention is shown to generally include a first plate member 12. The first plate member 12 is intended to address one disk level and attach to two adjacent vertebrae. The anterior plating system 10 is further shown to generally include a plurality of bone screws or fasteners 14 and a plurality of locking mechanisms 16 for preventing the bone screws 14 from backing out of the plate member 12 or loosening with respect to a vertebral body 18 (shown in FIG. 6) or other bone portion.
  • [0032]
    The plate member 12 includes a first pair of nodes having a first node 20 and a second node 22. The first and second nodes 20 and 22 define first and second bone screw apertures 24 and 26, respectively. The first and second nodes 20 and 22 are generally cylindrical in shape and are laterally spaced apart from one another in a first direction. In the embodiment illustrated and in a manner to be more fully discussed below, the first and second bone screw apertures 24 and 26 are intended to receive a pair of fasteners 14 for engaging a first vertebral body 18.
  • [0033]
    In a similar manner, the plate member 12 includes a second pair of nodes having a third node 28 and a fourth node 30. The third and fourth nodes 28 and 30 define third and fourth screw apertures 32 and 34, respectively. Again, the third and fourth nodes 28 and 30 are generally cylindrical in shape and spaced apart from one another in a lateral direction. The third and fourth bone screw apertures 32 and 34 are intended to receive a pair of fasteners 14 for engaging a second vertebral body 18.
  • [0034]
    The plate member 12 is further shown to include a plurality of axial bridges or linking segments 36 which connect the first and second pairs of nodes. The linking segments of the first plurality of linking segments 36 extend in a longitudinal or axial direction which is essentially perpendicular to the lateral direction in which the nodes of the pairs of nodes are spaced apart. The first plurality of linking segments 36 define elongated viewing windows. Explaining further, the elongated viewing windows 38 contribute to an open design of the plate member 12 that permits intra-operative visualization of bone grafts and vertebrae end bodies, as well as post-operative visualization of bone graft consolidation and spinal orientation on an anterior/posterior x-ray.
  • [0035]
    In the embodiment illustrated, the plate member 12 is illustrated to include three (3) linking segments 36. As such, adjacent linking segments 36 define two (2) elongated viewing windows 38. Those skilled in the art will readily appreciate that the particular number of linking segments 36 and elongated viewing windows 38 may be altered within the scope of the present invention.
  • [0036]
    As particularly shown in the end view of FIG. 3 and the cross-sectional view of FIG. 4, the plate member 12 is contoured about a longitudinally extending midline 40 (shown in FIG. 2). In this regard, the plate member 12 is shown to include a first lateral half oriented at an obtuse angle relative to a second lateral half. In one application, the obtuse angle is between approximately 160 and 170. The contour of the plate member eliminates manual fashioning of the plate member 12 to fit the contour of the spine, thereby decreasing surgical time. The contour of the plate member 12 also decreases interference with adjacent soft tissue after implantation.
  • [0037]
    With reference to FIG. 5, a second plate member 42 of the anterior cervical plating system 10 of the present invention is illustrated. The second plate member 42 shares various features with the first plate member 12. For this reason, like reference numerals have been used to identify substantially identical elements between the first and second plate members 12 and 42. The second plate member 42 differs from the first plate member 12 in that the linking segments 36 are longer and the viewing windows 38 are correspondingly longer. The second plate member 42 is intended to illustrate the flexibility of the present invention to accommodate patients having variable spinal dimensions. It will be understood that the length of the linking segments 36 may be longer or shorter than the linking segments 36 of plate members 12 and 42.
  • [0038]
    With reference to FIG. 6, a third plate member 46 of the anterior cervical plating system 10 of the present invention is illustrated. The third plate member or two disk level plate member 46 is intended to address two disk levels by attachment to three adjacent vertebrae. The third plate member 46 is similar to the second plate member 42 and additionally incorporates a third pair of nodes. The third pair of nodes has fifth and sixth nodes 48 and 50 defining fifth and sixth bone screw apertures (not specifically shown). As discussed with respect to the nodes described above, the fifth and sixth nodes 48 and 50 are generally cylindrical in shape and spaced apart from one another in the lateral direction. The bone screw apertures of the fifth and sixth nodes 48 and 50 receive bone screws 14 for engaging a third vertebral body 18 or other bone portion.
  • [0039]
    The third pair of nodes is connected to the second pair of nodes through a second plurality of linking segments 52. The second plurality of linking segments extend in the axial or longitudinal direction. Again, adjacent linking segments 52 of the second plurality of linking segments define elongated viewing windows 54.
  • [0040]
    The bone screws 14 of the system 10 of the present invention will be understood to be identical. As will become apparent below, in the exemplary embodiment the bone screws 14 cooperate with the plate member 12 to provide a range of angular freedom of the bone screws 14 relative to the plate 12. Alternatively, the bone screws 14 and apertures of the plate member 12 can be constructed in a known manner to restrict or prevent such angular freedom. In the embodiment illustrated, the bone screws 14 are permitted to articulate universally relative to the plate member 12 through a range of approximately 20. Such relative articulation allows for operative freedom in obtaining purchase of the bone screw in the vertebral bodies 18. As shown most clearly in the cross-sectional view of FIG. 4, the bone screws 14 adjacent to one another about the longitudinally extending center line 40 of the plate member 12 preferably converge as they extend into the vertebral body 18.
  • [0041]
    Each of the bone screws 14 is illustrated to include a head portion 58, a neck portion 59 and a shaft portion 60. The head portion 58 is shown to include a partially spherical segment 62 that engages an inwardly tapering lower portion 64 of the bone screw aperture 24, for example. These cooperating surfaces 62 and 64 facilitate relative movement between the bone screw 14 and associated one of the apertures of the plate member 12. The diameter of the head portion 58 of the bone screw 14 is larger than the opening of the bone screw aperture at a lower surface 66 of the plate member 12, thereby preventing the bone screw 14 from passing completely through the bone screw aperture.
  • [0042]
    The shaft 60 is shown to have a tapered shape with a relatively high pitch thread 68. The specific shaft features such as thread pitch, shaft diameter, and the like, are a matter of design choice and surgical preference.
  • [0043]
    In the exemplary embodiment illustrated, a locking mechanism in the form of a locking ring 16 is disposed within each of the bone screw apertures. The locking rings are illustrated as split locking rings 16 and are retained within the bone screw apertures. As such, discrete fasteners or other locking mechanisms are eliminated.
  • [0044]
    Each of the locking rings 16 is shown to include a first or lower radially extending flange 70 and a second or upper radially extending flange 72. The first radially extending flange 70 defines a lower opening 74 and the second radially extending flange 72 defines an upper opening 76. The first radially extending flange 70 is retained within an annular groove 80 formed in the sidewall of each of the bone screw apertures. The first and second radially extending flanges 70 and 72 are connected by an intermediate segment 82 such that the second radially extending flange is positioned slightly above an upper surface 84 of the plate member 12.
  • [0045]
    Each of the locking rings 16 is constructed of a suitable metal and is resiliently expandable from a retracted state to an expanded state. The retracted state is shown in FIGS. 1-4. The expanded state is shown in FIG. 10. When the locking ring 16 is in its retracted state, the opening 76 of the second radially extending flange 72 has a first diameter that is smaller than the diameter of the head portion 58. When the locking ring is in the expanded state, the diameter of the opening 76 is slightly greater than the diameter of the head portion 58 to thereby allow the head portion 58 to pass through the opening 76.
  • [0046]
    The bone screws 14 can be inserted with a conventional tool (not shown) having a philips-type head. When the bone screws 14 engage a vertebral body 18 and through rotation are drawn downward, the spherical segment 62 of the head portion 58 resiliently expands the locking member 16 from the retracted state to the expanded state. After the head portion 58 passes completely through the opening 76, the locking ring 16 resiliently returns to its retracted state and provides an audibly perceivable click. In this manner, the bone screws 14 are prevented from backing out relative to the plate member 12 and from loosening their purchase within the vertebral bodies 18. The particular configuration of the locking member 16 effectively prevents backing out of the bone screws 14. In this regard, if a bone screw 14 begins to back out, the head 58 of the bone screw 14 will engage a conically tapered inner surface of the locking ring 16. Such engagement forces the first radially extending flange 70 radially outward into the groove 80.
  • [0047]
    Turning now to FIGS. 6-10, a tool 90 for removing the bone screws 14 is illustrated. The tool 90 may also be used to insert the bone screws 14. However, the conventional philips-type screwdriver may provide the surgeon with better visibility of the head 58.
  • [0048]
    The tool 90 is illustrated to include a handle portion 92 having an upper portion or knob 94, a lower portion 96, and an intermediate portion 97. The upper portion 94 is adapted to rotate with a first portion or first drive portion 98, while the lower portion 96 is adapted to rotate with a second portion or second drive portion 100.
  • [0049]
    The intermediate portion 98 translates the first drive portion 97 relative to the second drive portion 100. The first drive portion 98 is illustrated as an externally threaded shaft and is adapted to engage an internally threaded aperture 102 of the head portion 58 of each of the bone screws 14. The second drive portion 100 comprises a hollow cylindrical member surrounding the first portion 98 and includes a tip having four drive elements 104 equally spaced about the first drive member 98. The drive elements 104 are adapted to engage a corresponding number of slots 106 (shown in FIG. 1) equally spaced about the head portion 58 of each of the bone screws 14. The drive elements 104 include outer surfaces lying on a circle having a diameter substantially equal to the diameter of the opening 76 when the locking ring 16 is in the expanded state. The diameter of the circle is slightly greater than the diameter of the head portion 58.
  • [0050]
    When the bone screws 14 are implanted into the vertebral bodies 18 (in the orientation shown in FIG. 4, for example), the tool 90 can be used to retract the bone screws 14. The first portion 98 threadably engages the internally threaded aperture 102 of the head portion 58 through rotation of the upper portion 94 of the handle 92 in a clockwise direction. Rotation of the intermediate portion 97 of the handle 92 draws the tool 90 down onto the implanted bone screw 14. As the second portion 100 is drawn downward, the drive elements 104 resiliently expand the locking member 16 from its retracted state to its expanded state and the drive elements 104 engage the slots 106 of the head portion 58. Once the locking ring 16 expands, the lower portion 96 of the handle 92 can be rotated to correspondingly rotate the second drive portion 100 and back the bone screw 14 out of the associated bone screw aperture.
  • [0051]
    In one application, the preferred material of the plate and the bone screws of the present invention is a titanium alloy. One suitable alloy is Ti-6Al-4V. However, it will be understood that the preferred material is not the only material form which the components of the presently disclosed invention may be formed. In this regard, the plate and bone screws may be constructed of any suitable biocompatible material which has the structural strength and durability to withstand the cyclical loading associated with long term fixation.
  • [0052]
    While the invention has been described in the specification and illustrated in the drawings with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention as defined in the claims. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. For example, additional pairs of nodes may be incorporated for addressing additional disk levels. Therefore, it is intended that the invention not be limited to the particular embodiment illustrated by the drawings and described in the specification as the best mode presently contemplated for carrying out this invention, but that the invention will include any embodiments falling within the description of the appended claims.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2322509 *Jun 18, 1941Jun 22, 1943 Screw
US3289290 *Mar 14, 1963Dec 6, 1966Raymond P SandorMethod and apparatus for installing fasteners
US5352231 *Nov 23, 1992Oct 4, 1994Danek Medical, Inc.Nut starter wrench for orthopedic fixation system
US5607432 *Jan 23, 1995Mar 4, 1997Linvatec CorporationThreaded suture anchor retriever
US5702398 *Feb 21, 1997Dec 30, 1997Tarabishy; SamTension screw
US5707373 *Apr 26, 1996Jan 13, 1998Ikonos CorporationBone fastener and instrument for insertion thereof
US6139549 *Feb 25, 1997Oct 31, 2000Waldemar Link (Gmbh & Co.)Spinal fixing device
US6258092 *Jul 3, 1997Jul 10, 2001Vagn Erik DallCortical bone screw
US6325803 *Sep 10, 1999Dec 4, 2001Walter Lorenz Surgical, Inc.Method and apparatus for mandibular osteosynthesis
US6436100 *Aug 7, 1998Aug 20, 2002J. Lee BergerCannulated internally threaded bone screw and reduction driver device
US6436199 *Aug 29, 2000Aug 20, 2002Kawasaki Steel CorporationNon-oriented magnetic steel sheet having low iron loss and high magnetic flux density and manufacturing method therefor
US6440136 *May 24, 2000Aug 27, 2002Medtronic Ps Medical, Inc.Apparatus for attaching to bone
US6454769 *Jun 2, 1998Sep 24, 2002Spinal Concepts, Inc.System and method for stabilizing the human spine with a bone plate
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7001389Jul 5, 2002Feb 21, 2006Navarro Richard RFixed and variable locking fixation assembly
US7527640 *Dec 22, 2004May 5, 2009Ebi, LlcBone fixation system
US7655028Jan 18, 2007Feb 2, 2010X-Spine Systems, Inc.Spinal fusion system and method for fusing spinal bones
US7662175Apr 5, 2004Feb 16, 2010Jackson Roger PUpload shank swivel head bone screw spinal implant
US7727266Jun 17, 2004Jun 1, 2010Warsaw Orthopedic, Inc.Method and apparatus for retaining screws in a plate
US7736380Dec 21, 2005Jun 15, 2010Rhausler, Inc.Cervical plate system
US7740649Oct 26, 2004Jun 22, 2010Pioneer Surgical Technology, Inc.Bone plate system and methods
US7766911Dec 5, 2005Aug 3, 2010Theken Spine, LlcFixed and variable locking fixation assembly
US7766915Aug 3, 2010Jackson Roger PDynamic fixation assemblies with inner core and outer coil-like member
US7776047Feb 11, 2004Aug 17, 2010Depuy Spine, Inc.Guide for spinal tools, implants, and devices
US7780666Jun 1, 2005Aug 24, 2010Theken Spine, LlcFixed and variable locking fixation assembly
US7785327Jun 1, 2005Aug 31, 2010Theken Spine, LlcFixed and variable locking fixation assembly
US7862587Jan 9, 2006Jan 4, 2011Jackson Roger PDynamic stabilization assemblies, tool set and method
US7875065Jan 25, 2011Jackson Roger PPolyaxial bone screw with multi-part shank retainer and pressure insert
US7887570Apr 30, 2009Feb 15, 2011Ebi, LlcBone fixation system
US7901437Mar 8, 2011Jackson Roger PDynamic stabilization member with molded connection
US7909829Jun 27, 2003Mar 22, 2011Depuy Spine, Inc.Tissue retractor and drill guide
US7909848Feb 11, 2004Mar 22, 2011Depuy Spine, Inc.Tissue retractor and guide device
US7909859Oct 26, 2005Mar 22, 2011Pioneer Surgical Technology, Inc.Bone plate system and methods
US7935123Sep 17, 2003May 3, 2011Depuy Acromed, Inc.Drill guide with alignment feature
US7935137May 3, 2011Depuy Spine, Inc.Locking bone screw and spinal plate system
US7942909Aug 13, 2009May 17, 2011Ortho Innovations, LlcThread-thru polyaxial pedicle screw system
US7942910May 16, 2007May 17, 2011Ortho Innovations, LlcPolyaxial bone screw
US7942911Jun 12, 2009May 17, 2011Ortho Innovations, LlcPolyaxial bone screw
US7947065Jan 16, 2009May 24, 2011Ortho Innovations, LlcLocking polyaxial ball and socket fastener
US7951170May 30, 2008May 31, 2011Jackson Roger PDynamic stabilization connecting member with pre-tensioned solid core
US7951173Feb 4, 2010May 31, 2011Ortho Innovations, LlcPedicle screw implant system
US7963982Jul 16, 2007Jun 21, 2011X-Spine Systems, Inc.Implant plate screw locking system and screw having a locking member
US7967850Oct 29, 2008Jun 28, 2011Jackson Roger PPolyaxial bone anchor with helical capture connection, insert and dual locking assembly
US7988714Apr 4, 2007Aug 2, 2011Aesculap AgBone screw
US8012177Jun 19, 2009Sep 6, 2011Jackson Roger PDynamic stabilization assembly with frusto-conical connection
US8062367Jan 12, 2007Nov 22, 2011X-Spine Systems, Inc.Screw locking mechanism and method
US8066739Nov 29, 2011Jackson Roger PTool system for dynamic spinal implants
US8092500Sep 15, 2009Jan 10, 2012Jackson Roger PDynamic stabilization connecting member with floating core, compression spacer and over-mold
US8092502Oct 5, 2007Jan 10, 2012Jackson Roger PPolyaxial bone screw with uploaded threaded shank and method of assembly and use
US8100915Jan 24, 2012Jackson Roger POrthopedic implant rod reduction tool set and method
US8105368Aug 1, 2007Jan 31, 2012Jackson Roger PDynamic stabilization connecting member with slitted core and outer sleeve
US8128667Oct 5, 2007Mar 6, 2012Jackson Roger PAnti-splay medical implant closure with multi-surface removal aperture
US8137386Aug 28, 2003Mar 20, 2012Jackson Roger PPolyaxial bone screw apparatus
US8152810Nov 23, 2004Apr 10, 2012Jackson Roger PSpinal fixation tool set and method
US8162948Apr 24, 2012Jackson Roger POrthopedic implant rod reduction tool set and method
US8172885Feb 5, 2004May 8, 2012Pioneer Surgical Technology, Inc.Bone plate system
US8197518Jul 28, 2010Jun 12, 2012Ortho Innovations, LlcThread-thru polyaxial pedicle screw system
US8221476Apr 13, 2007Jul 17, 2012Paul Kamaljit SSpinal plate assembly
US8236033Aug 13, 2007Aug 7, 2012Paul Kamaljit SSpinal plate assembly
US8257396May 23, 2008Sep 4, 2012Jackson Roger PPolyaxial bone screw with shank-retainer inset capture
US8257398Jan 16, 2008Sep 4, 2012Jackson Roger PPolyaxial bone screw with cam capture
US8257402Feb 20, 2004Sep 4, 2012Jackson Roger PClosure for rod receiving orthopedic implant having left handed thread removal
US8257407 *Apr 23, 2009Sep 4, 2012Aryan Henry EBone plate system and method
US8262710Oct 24, 2006Sep 11, 2012Aesculap Implant Systems, LlcDynamic stabilization device for anterior lower lumbar vertebral fusion
US8262711Mar 15, 2010Sep 11, 2012Spinal Simplicity LlcDynamic vertebral column plate system
US8273089Sep 25, 2012Jackson Roger PSpinal fixation tool set and method
US8273109Apr 26, 2004Sep 25, 2012Jackson Roger PHelical wound mechanically interlocking mating guide and advancement structure
US8282673Feb 20, 2004Oct 9, 2012Jackson Roger PAnti-splay medical implant closure with multi-surface removal aperture
US8282675Jan 25, 2008Oct 9, 2012Depuy Spine, Inc.Anti-backout mechanism
US8282682Dec 17, 2009Oct 9, 2012X-Spine Systems, Inc.Fusion system and method for fusing spinal bones
US8292892May 13, 2009Oct 23, 2012Jackson Roger POrthopedic implant rod reduction tool set and method
US8292926Aug 17, 2007Oct 23, 2012Jackson Roger PDynamic stabilization connecting member with elastic core and outer sleeve
US8308782Aug 3, 2010Nov 13, 2012Jackson Roger PBone anchors with longitudinal connecting member engaging inserts and closures for fixation and optional angulation
US8317843 *Jul 11, 2007Nov 27, 2012Perumala CorporationMulti-axis connection and methods for internal spinal stabilizers
US8328855 *Jul 30, 2010Dec 11, 2012Alexandre WorcelOsteosynthesis device with rapid fixing means
US8343194Aug 15, 2008Jan 1, 2013Kamran AflatoonAnterior cervical staple
US8353932Aug 20, 2008Jan 15, 2013Jackson Roger PPolyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member
US8353939 *Jan 12, 2005Jan 15, 2013Warsaw Orthopedic, Inc.Anchor retaining mechanisms for bone plates
US8361130Oct 5, 2007Jan 29, 2013Depuy Spine, Inc.Bone screw fixation
US8366745Jul 1, 2009Feb 5, 2013Jackson Roger PDynamic stabilization assembly having pre-compressed spacers with differential displacements
US8366753Jun 26, 2006Feb 5, 2013Jackson Roger PPolyaxial bone screw assembly with fixed retaining structure
US8372152Jul 16, 2007Feb 12, 2013X-Spine Systems, Inc.Spinal fusion system utilizing an implant plate having at least one integral lock and ratchet lock
US8377067Feb 19, 2013Roger P. JacksonOrthopedic implant rod reduction tool set and method
US8377100May 9, 2002Feb 19, 2013Roger P. JacksonClosure for open-headed medical implant
US8377102Mar 26, 2010Feb 19, 2013Roger P. JacksonPolyaxial bone anchor with spline capture connection and lower pressure insert
US8394107Jul 16, 2010Mar 12, 2013Depuy Spine, Inc.Guide for spinal tools, implants, and devices
US8394133Jul 23, 2010Mar 12, 2013Roger P. JacksonDynamic fixation assemblies with inner core and outer coil-like member
US8398682May 12, 2010Mar 19, 2013Roger P. JacksonPolyaxial bone screw assembly
US8398688Jun 22, 2011Mar 19, 2013Aesculap AgBone screw
US8444681Apr 13, 2012May 21, 2013Roger P. JacksonPolyaxial bone anchor with pop-on shank, friction fit retainer and winged insert
US8460348Mar 24, 2011Jun 11, 2013Depuy Spine, Inc.Locking bone screw and spinal plate system
US8465530May 6, 2011Jun 18, 2013Ortho Innovations, LlcLocking polyaxial ball and socket fastener
US8475498Jan 3, 2008Jul 2, 2013Roger P. JacksonDynamic stabilization connecting member with cord connection
US8480716Apr 24, 2009Jul 9, 2013Pioneer Surgical Technology, Inc.Bone plate system
US8506599Aug 5, 2011Aug 13, 2013Roger P. JacksonDynamic stabilization assembly with frusto-conical connection
US8540753Oct 5, 2004Sep 24, 2013Roger P. JacksonPolyaxial bone screw with uploaded threaded shank and method of assembly and use
US8545538Apr 26, 2010Oct 1, 2013M. Samy AbdouDevices and methods for inter-vertebral orthopedic device placement
US8556938Oct 5, 2010Oct 15, 2013Roger P. JacksonPolyaxial bone anchor with non-pivotable retainer and pop-on shank, some with friction fit
US8574270Aug 15, 2012Nov 5, 2013Spinal Simplicity LlcBone plate assembly with bone screw retention features
US8591515Aug 26, 2009Nov 26, 2013Roger P. JacksonSpinal fixation tool set and method
US8591552Aug 2, 2012Nov 26, 2013Roger P. JacksonAnti-splay medical implant closure with multi-surface removal aperture
US8591560Aug 2, 2012Nov 26, 2013Roger P. JacksonDynamic stabilization connecting member with elastic core and outer sleeve
US8613760Dec 14, 2011Dec 24, 2013Roger P. JacksonDynamic stabilization connecting member with slitted core and outer sleeve
US8623019Jul 3, 2008Jan 7, 2014Pioneer Surgical Technology, Inc.Bone plate system
US8636769Jun 18, 2012Jan 28, 2014Roger P. JacksonPolyaxial bone screw with shank-retainer insert capture
US8668723Jul 19, 2011Mar 11, 2014Neurostructures, Inc.Anterior cervical plate
US8672978 *Mar 4, 2011Mar 18, 2014Zimmer Spine, Inc.Transverse connector
US8672984May 11, 2010Mar 18, 2014Warsaw Orthopedic, Inc.Method and apparatus for retaining screw in a plate
US8696711Jul 30, 2012Apr 15, 2014Roger P. JacksonPolyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member
US8728130Jun 8, 2011May 20, 2014X-Spine Systems, Inc.Implant plate screw locking system and screw having a locking member
US8795370Aug 7, 2012Aug 5, 2014X-Spine Systems, Inc.Fusion system and method for fusing spinal bones
US8814911May 12, 2011Aug 26, 2014Roger P. JacksonPolyaxial bone screw with cam connection and lock and release insert
US8814913Sep 3, 2013Aug 26, 2014Roger P JacksonHelical guide and advancement flange with break-off extensions
US8814915Aug 17, 2012Aug 26, 2014Spinal Simplicity LlcDynamic vertebral column plate system
US8821553Apr 19, 2006Sep 2, 2014X-Spine Systems, Inc.Spinal fusion system utilizing an implant plate having at least one integral lock
US8840652Oct 22, 2012Sep 23, 2014Roger P. JacksonBone anchors with longitudinal connecting member engaging inserts and closures for fixation and optional angulation
US8845649May 13, 2009Sep 30, 2014Roger P. JacksonSpinal fixation tool set and method for rod reduction and fastener insertion
US8852239Feb 17, 2014Oct 7, 2014Roger P JacksonSagittal angle screw with integral shank and receiver
US8870928Apr 29, 2013Oct 28, 2014Roger P. JacksonHelical guide and advancement flange with radially loaded lip
US8876868Apr 8, 2005Nov 4, 2014Roger P. JacksonHelical guide and advancement flange with radially loaded lip
US8882812Oct 14, 2013Nov 11, 2014Spinal Simplicity LlcBone plate assembly with plates that ratchet together
US8894651Sep 11, 2008Nov 25, 2014Kamran AflatoonMethod of lateral facet approach, decompression and fusion using screws and staples as well as arthroplasty
US8894657Nov 28, 2011Nov 25, 2014Roger P. JacksonTool system for dynamic spinal implants
US8894694 *Aug 26, 2011Nov 25, 2014Mark Leonard BrandonLocking plates having guided locking screws and methods therefor
US8900272Jan 28, 2013Dec 2, 2014Roger P JacksonDynamic fixation assemblies with inner core and outer coil-like member
US8900277Mar 22, 2011Dec 2, 2014Pioneer Surgical Technology, Inc.Bone plate system
US8911477Oct 21, 2008Dec 16, 2014Roger P. JacksonDynamic stabilization member with end plate support and cable core extension
US8911478Nov 21, 2013Dec 16, 2014Roger P. JacksonSplay control closure for open bone anchor
US8911479Jan 10, 2013Dec 16, 2014Roger P. JacksonMulti-start closures for open implants
US8926670Mar 15, 2013Jan 6, 2015Roger P. JacksonPolyaxial bone screw assembly
US8926672Nov 21, 2013Jan 6, 2015Roger P. JacksonSplay control closure for open bone anchor
US8936623Mar 15, 2013Jan 20, 2015Roger P. JacksonPolyaxial bone screw assembly
US8974504May 10, 2013Mar 10, 2015Spinal Simplicity LlcDynamic bone fracture plates
US8979904Sep 7, 2012Mar 17, 2015Roger P JacksonConnecting member with tensioned cord, low profile rigid sleeve and spacer with torsion control
US8998959Oct 19, 2011Apr 7, 2015Roger P JacksonPolyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert
US8998960May 17, 2013Apr 7, 2015Roger P. JacksonPolyaxial bone screw with helically wound capture connection
US9050139Mar 15, 2013Jun 9, 2015Roger P. JacksonOrthopedic implant rod reduction tool set and method
US9050148Nov 10, 2005Jun 9, 2015Roger P. JacksonSpinal fixation tool attachment structure
US9055978Oct 2, 2012Jun 16, 2015Roger P. JacksonOrthopedic implant rod reduction tool set and method
US9078706Mar 1, 2012Jul 14, 2015X-Spine Systems, Inc.Intervertebral fusion device utilizing multiple mobile uniaxial and bidirectional screw interface plates
US9095444Jul 24, 2009Aug 4, 2015Warsaw Orthopedic, Inc.Implant with an interference fit fastener
US9101404Jan 26, 2011Aug 11, 2015Roger P. JacksonDynamic stabilization connecting member with molded connection
US9101407Jan 20, 2014Aug 11, 2015Howmedica Osteonics Corp.Anterior cervical plate
US9113964Aug 6, 2014Aug 25, 2015Howmedica Osteonics Corp.Anterior cervical plate
US9119676Dec 21, 2012Sep 1, 2015DePuy Synthes Products, Inc.Bone screw fixation
US9119677Mar 9, 2006Sep 1, 2015DePuy Synthes Products, Inc.Spinal plate and drill guide
US9144444May 12, 2011Sep 29, 2015Roger P JacksonPolyaxial bone anchor with helical capture connection, insert and dual locking assembly
US9168069Oct 26, 2012Oct 27, 2015Roger P. JacksonPolyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer
US9198695Feb 27, 2013Dec 1, 2015Zimmer Spine, Inc.Polyaxial pedicle screw
US9198769Dec 21, 2012Dec 1, 2015Pioneer Surgical Technology, Inc.Bone anchor assembly, bone plate system, and method
US9211150Sep 23, 2010Dec 15, 2015Roger P. JacksonSpinal fixation tool set and method
US9216039Nov 19, 2010Dec 22, 2015Roger P. JacksonDynamic spinal stabilization assemblies, tool set and method
US9216041Feb 8, 2012Dec 22, 2015Roger P. JacksonSpinal connecting members with tensioned cords and rigid sleeves for engaging compression inserts
US9226775May 10, 2013Jan 5, 2016DePuy Synthes Products, Inc.Locking bone screw and spinal plate system
US20060122604 *Dec 8, 2004Jun 8, 2006Depuy Spine, Inc.Locking bone screw and spinal plate system
US20060155285 *Jan 12, 2005Jul 13, 2006Kent AndersonAnchor retaining mechanisms for bone plates
US20070055250 *Jul 11, 2006Mar 8, 2007Kamran AflatoonCervical plates with spacer mechanism
US20070162013 *Mar 9, 2006Jul 12, 2007Depuy Spine, Inc.Spinal plate and drill guide
US20070288025 *Apr 4, 2007Dec 13, 2007Andrea PeukertBone Screw
US20080234749 *Jan 26, 2007Sep 25, 2008Zimmer Technology, Inc.Bone plate providing threaded locking head screw capture
US20090018557 *Jul 11, 2007Jan 15, 2009Perumala CorporationMulti-axis connection and methods for internal spinal stabilizers
US20090099602 *Sep 11, 2008Apr 16, 2009Kamran AflatoonMethod of lateral facet approach, decompression and fusion using screws and staples as well as arthroplasty
US20090192553 *Jul 30, 2009Depuy Spine, Inc.Anti-backout mechanism
US20090270927 *Apr 24, 2009Oct 29, 2009Pioneer Surgical Technology, Inc.Bone Plate System
US20090306667 *Mar 26, 2009Dec 10, 2009David LeeMethod and apparatus for cervical fusion
US20100217399 *Feb 22, 2010Aug 26, 2010Groh Gordon IBase plate system for shoulder arthroplasty and method of using the same
US20100234895 *Sep 16, 2010Harold HessDynamic Vertebral Column Plate System
US20110054541 *Jul 30, 2010Mar 3, 2011Alexandre WorcelOsteosynthesis Device With Rapid Fixing Means
US20110106157 *Oct 30, 2009May 5, 2011Warsaw Orthropedic, Inc.Self-Locking Interference Bone Screw for use with Spinal Implant
US20110172719 *Jul 14, 2011Depuy Spine, Inc.Locking Bone Screw and Spinal Plate System
US20120071934 *Aug 26, 2011Mar 22, 2012Mark Leonard BrandonLocking plates having guided locking screws and methods therefor
US20120226316 *Mar 4, 2011Sep 6, 2012Zimmer Spine, Inc.Transverse connector
US20130317554 *May 23, 2012Nov 28, 2013Thomas PurcellLocking mechanism for an implantable medical device
USD734853Feb 22, 2013Jul 21, 2015Nuvasive, Inc.Bone plate
WO2009120819A2 *Mar 26, 2009Oct 1, 2009Lee David M DMethod and apparatus for cervical fusion
Classifications
U.S. Classification606/86.00B, 606/298, 606/290, 606/286, 606/907, 606/902, 606/287, 606/281
International ClassificationA61B17/70, A61B17/80, A61B17/88
Cooperative ClassificationA61B17/8042, A61B17/8888, A61B17/7059
European ClassificationA61B17/88S4C, A61B17/70K
Legal Events
DateCodeEventDescription
Dec 10, 2007ASAssignment
Aug 14, 2008ASAssignment
Owner name: EBI, LLC,NEW JERSEY
Free format text: CHANGE OF NAME;ASSIGNOR:EBI, INC.;REEL/FRAME:021387/0450
Effective date: 20080227
May 26, 2009ASAssignment
Owner name: EBI, LLC,NEW JERSEY
Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNOR INCORRECTLY IDENTIFIED AS EBI, INC. ON ORIGINAL RECORDATION COVERSHEET SHOULD HAVE BEEN IDENTIFIED AS EBI, L.P. PREVIOUSLY RECORDED ON REEL 021387 FRAME 0450. ASSIGNOR(S) HEREBY CONFIRMS THE ORIGINAL CONVEYANCE TEXT APPEARING IN NAME CHANGE DOCUMENTATION REFLECTS EBI, L.P. IS NOW KNOWN AS EBI, LLC.;ASSIGNOR:EBI, L.P.;REEL/FRAME:022727/0859
Effective date: 20080227
Owner name: EBI, LLC, NEW JERSEY
Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNOR INCORRECTLY IDENTIFIED AS EBI, INC. ON ORIGINAL RECORDATION COVERSHEET SHOULD HAVE BEEN IDENTIFIED AS EBI, L.P. PREVIOUSLY RECORDED ON REEL 021387 FRAME 0450. ASSIGNOR(S) HEREBY CONFIRMS THE ORIGINAL CONVEYANCE TEXT APPEARING IN NAME CHANGE DOCUMENTATION REFLECTS EBI, L.P. IS NOW KNOWN AS EBI, LLC.;ASSIGNOR:EBI, L.P.;REEL/FRAME:022727/0859
Effective date: 20080227
Nov 23, 2015ASAssignment
Owner name: BIOMET, INC., INDIANA
Free format text: RELEASE OF SECURITY INTEREST IN PATENTS RECORDED AT REEL 020362/ FRAME 0001;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:037155/0133
Effective date: 20150624
Owner name: LVB ACQUISITION, INC., INDIANA
Free format text: RELEASE OF SECURITY INTEREST IN PATENTS RECORDED AT REEL 020362/ FRAME 0001;ASSIGNOR:BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT;REEL/FRAME:037155/0133
Effective date: 20150624