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 numberUS20040111088 A1
Publication typeApplication
Application numberUS 10/313,171
Publication dateJun 10, 2004
Filing dateDec 6, 2002
Priority dateDec 6, 2002
Also published asCA2508558A1, DE60327464D1, EP1572016A2, EP1572016B1, US20140094858, WO2004052217A2, WO2004052217A3
Publication number10313171, 313171, US 2004/0111088 A1, US 2004/111088 A1, US 20040111088 A1, US 20040111088A1, US 2004111088 A1, US 2004111088A1, US-A1-20040111088, US-A1-2004111088, US2004/0111088A1, US2004/111088A1, US20040111088 A1, US20040111088A1, US2004111088 A1, US2004111088A1
InventorsGeorge Picetti, Anthony Melkent, John Young
Original AssigneePicetti George D., Melkent Anthony J., Young John Stewart
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Multi-rod bone attachment member
US 20040111088 A1
Abstract
A fixation element for use in orthopedic surgery, particularly spinal surgery is disclosed. The fixation element is capable of being screwed, hooked, or otherwise attached to a bone, and is configured to accommodate two or more rods or other elongated members. The head of the fixation elements thus has multiple places for positioning a rod, either vertically or horizontally spaced from each other.
Images(4)
Previous page
Next page
Claims(35)
What is claimed is:
1. An apparatus comprising:
a one-piece head portion having one or more channels, said channels being configured so that a plurality of elongated members may be connected to said head via one or more of said channels;
at least one holder connected to said head portion, said at least one holder holding at least one of said elongated members within their respective channels; and
an attachment portion connected to said head portion for connecting said head portion to a bone.
2. The apparatus of claim 1, wherein one or more of said channels are oriented in one of (a) open at a back portion of said head portion, and (b) open at a side portion of said head portion.
3. The apparatus of claim 1, wherein said head portion has two channels.
4. The apparatus of claim 3, wherein said channels are substantially parallel, and said head portion is substantially W-shaped.
5. The apparatus of claim 4, wherein each of said channels has approximately the same width or radius.
6. The apparatus of claim 4, wherein one of said channels has a width or radius larger than the other of said channels.
7. The apparatus of claim 3, wherein a female thread is within each of said channels, and said at least one holder comprises a first set screw compatible with said thread in one of said channels and a second set screw compatible with said thread in the other of said channels.
8. The apparatus of claim 1, wherein said attachment portion is integral with said head portion.
9. The apparatus of claim 1, wherein said attachment portion is movably connected with said head portion.
10. The apparatus of claim 9, wherein said attachment portion is at least one of rotatably and multi-axially connected with said head portion.
11. The apparatus of claim 10, wherein said head portion includes an upper end and a lower end and an opening near said lower end, and said attachment portion includes a threaded distal portion and a proximal driving portion, at least a part of said driving portion being sized to fit in said opening.
12. The apparatus of claim 11, wherein said opening has a substantially cylindrical portion, said head portion further including a groove around at least a part of said substantially cylindrical portion, and said apparatus further comprising a snap-ring fitted in said groove, said snap-ring having an inner diameter and an outer diameter configured such that said outer diameter is not smaller than a diameter of said groove when said snap-ring is in an unstressed state, and said inner diameter is smaller than a diameter of said proximal driving portion of said attachment portion.
13. The apparatus of claim 12 further comprising a crown member situated in said head portion above said proximal driving portion of said attachment portion, whereby said head portion and said attachment portion can be locked together by pressing down on said crown member.
14. The apparatus of claim 12 wherein said proximal driving portion of said attachment members includes a flange.
15. The apparatus of claim 1, further comprising a second attachment portion connected to said head portion for connecting to a bone.
16. The apparatus of claim 15, wherein said second attachment portion includes threads for engaging a bone.
17. The apparatus of claim 15, wherein said second attachment portion is movably connected to said head portion.
18. The apparatus of claim 15, wherein said second attachment portion is at least one of rotatably and multi-axially connected to said head portion.
19. The apparatus of claim 15 wherein said second attachment portion includes a fixed prong for engaging a bone.
20. The apparatus of claim 1 wherein said head portion has a lower end and an upper end, and said lower end is curved so as to approximate the anatomical curvature of a bone.
21. The apparatus of claim 1 wherein said head portion has a medial axis, and said attachment portion is situated along said medial axis.
22. The apparatus of claim 1 wherein said head portion has a medial axis, and said attachment portion is situated to one side of said medial axis.
23. The apparatus of claim 1 wherein said attachment portion is one of a threaded attachment portion and a hooked attachment portion.
24. A method comprising:
providing a bone-engaging apparatus having an upper head portion and at least one lower attachment portion, said head portion having a plurality of channels so that said head portion is capable of receiving a plurality of elongated members;
connecting said attachment portion of said apparatus to a bone;
inserting an elongated member into one of said channels; and
connecting a holder to said head portion to hold said elongated member in said channel.
25. The method of claim 24, wherein said holder connecting step comprises threading a set screw into the channel into which said elongated member has been inserted until a clamping force is exerted by said set screw on said elongated member sufficient to lock the elongated member with respect to said head portion.
26. The method of claim 24, further comprising inserting a second elongated member into one of said channels.
27. The method of claim 26, wherein said second elongated member is inserted into a channel previously unoccupied by an elongated member.
28. The method of claim 27, further comprising connecting a holder to said head portion to hold said second elongated member in said channel.
29. The method of claim 28, wherein said holder connecting step comprises threading a set screw into the channel into which said second elongated member has been inserted until a clamping force is exerted by said set screw on said second elongated member.
30. The method of claim 27, further comprising:
adjusting the bone prior to insertion of the first elongated member; and
further adjusting the bone prior to insertion of the second elongated member.
31. The method of claim 26, wherein said second elongated member is inserted into a channel previously occupied by an elongated member.
32. The method of claim 24 further comprising adjusting the relative position of said attachment portion and said head portion prior to a time when said elongated member is locked with respect to said apparatus.
33. An apparatus comprising:
a head portion, said head portion having first and second outer legs and at least one post between said legs, a first channel between said first leg and said post, and a second channel between said second leg and said post, a first thread formed on said first leg and said post and a second thread formed on said second leg and said post;
first and second set screws, said first set screw adapted to be threaded in said first thread to close said first channel, and said second set screw adapted to be threaded in said second thread to close said second channel; and
a bone connection portion connected to said head portion, whereby said apparatus is connected to a bone.
34. The apparatus of claim 33, further comprising at least a first elongated member, wherein at least a portion of said first elongated member occupies at least a portion of said first channel and said first set screw provides a clamping force to hold said elongated member with respect to said head portion.
35. The apparatus of claim 34, further comprising at least a second elongated member, wherein at least a portion of said second elongated member occupies at least a portion of said second channel and said second set screw provides a clamping force to hold said elongated member with respect to said head portion.
Description
    BACKGROUND OF THE INVENTION
  • [0001]
    A variety of implants are known in the art for attaching an elongated member, e.g. an elongated bar or rod, to one or more bones for the purpose of correcting deformity, promoting healing, or other therapeutic uses. Among such devices are those disclosed in U.S. Pat. No. 5,005,562 to Cotrel, U.S. Pat. No. 5,797,911 to Sherman et al., and U.S. Pat. No. 6,280,442 to Barker et al. In those devices, a U-shaped head is provided for accommodating an orthopedic rod, such as that used in corrective spinal surgery. A threaded element or hook connects the U-shaped head to a bone portion, and a set screw locks the elongated rod within the U-shaped head.
  • SUMMARY OF THE INVENTION
  • [0002]
    In one embodiment, an apparatus is disclosed which comprises a one-piece head portion having one or more channels, with the channels being configured so that a plurality of elongated members (e.g. spinal rods) may be connected to the head via one or more of the channels. At least one holder is connected to the head portion and holds at least one of the elongated members within their respective channels, and an attachment portion is provided connected to the head portion for connecting the head portion to a bone. There may be two substantially parallel channels in the head portion, with the head portion being substantially W-shaped. Such a pair of channels can have approximately the same width or radius, or one of the channels can have a width or radius larger than the other. A female thread can be formed in each of such channels, with set screws provided as the holders. The attachment portion may be integral with or may be movably connected with the head portion. If they are movably connected, the attachment portion may be rotatably or multi-axially connected with the head portion.
  • [0003]
    Another embodiment of an apparatus according to the invention comprises a head portion having first and second outer legs and at least one post between the legs, a first channel between the first leg and the post, and a second channel between the second leg and the post. A first thread is formed on the first leg and the post, and a second thread is formed on the second leg and the post. First and second set screws are provided, with the first set screw adapted to be threaded in the first thread to close the first channel, and the second set screw adapted to be threaded in the second thread to close the second channel. A bone connection portion is connected to the head portion, whereby the apparatus is connected to a bone. The apparatus can further comprise a first elongated member, such as a spinal rod, such that at least a portion of the first elongated member occupies at least a portion of the first channel. The first set screw provides a clamping force to hold the elongated member with respect to the head portion. A second elongated member can also be provided such that at least a portion of the second elongated member occupies at least a portion of the second channel in the head portion, and the second set screw provides a clamping force to hold the second elongated member with respect to the head portion.
  • [0004]
    A method is also disclosed, comprising providing a bone-engaging apparatus having an upper head portion and at least one lower attachment portion, with the head portion having a plurality of channels for receiving one or more elongated members; connecting the attachment portion of the apparatus to a bone; inserting an elongated member into one of the channels; and connecting a holder to said head portion to hold said elongated member in said channel. The holder connecting step can include threading a set screw into the channel into which the elongated member has been inserted until the set screw exerts a clamping force on said elongated member sufficient to lock it with respect to the head portion. The method may further include inserting a second elongated member into one of the channels. The channel into which the second elongated member is inserted can be previously occupied or unoccupied by an elongated member. An additional holder may be provided, if necessary, for the second elongated member. For example, a set screw may be threaded into the channel into which the second elongated member has been inserted until it exerts a clamping force on the second elongated member. The method may also include adjusting the bone prior to insertion of the first elongated member, and further adjustment of the bone prior to insertion of the second elongated member. The relative position of the attachment portion and the head portion may be adjusted prior to a time when the elongated member(s) are locked with respect to the apparatus.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0005]
    [0005]FIG. 1 is a front elevational view of a first embodiment of a bone fixation element according to the invention.
  • [0006]
    [0006]FIG. 2 is a side view of the embodiment shown in FIG. 1.
  • [0007]
    [0007]FIG. 3 is a cross-sectional view taken along the lines 3-3 and viewed in the direction of the arrows of the embodiment shown in FIG. 1.
  • [0008]
    [0008]FIG. 4 is a partial cross-sectional view of a further embodiment of a bone fixation element according to the invention.
  • [0009]
    [0009]FIG. 5 is a partial cross-sectional view of another embodiment of a bone fixation element according to the invention.
  • [0010]
    [0010]FIG. 6 is a partial cross-sectional view of yet another embodiment of a bone fixation element according to the invention.
  • [0011]
    [0011]FIG. 7 is a partial cross-sectional view of another embodiment of a bone fixation element according to the invention.
  • [0012]
    [0012]FIG. 8 is a partial cross-sectional view of a still further embodiment of a bone fixation element according to the invention.
  • [0013]
    [0013]FIG. 9 is a partial cross-sectional view of another embodiment of a bone fixation element according to the invention.
  • [0014]
    [0014]FIG. 10 is a side view of yet another embodiment of a bone fixation element according to the invention.
  • [0015]
    [0015]FIG. 11 is a side view of another embodiment of a bone fixation element according to the invention.
  • DESCRIPTION OF THE PREFERRED EMBODIMENT
  • [0016]
    For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated therein being contemplated, as would normally occur to one skilled in the art to which the invention relates.
  • [0017]
    Referring now generally to FIG. 1, there is shown one embodiment of a fixation element 10 according to the present invention. In that embodiment, fixation element 10 includes a head portion 12 and an attachment portion 14. Although fixation element 10 is depicted as a bone screw, with a threaded attachment portion 14, one of ordinary skill in this art will appreciate that threaded attachment portion 14 could be replaced with a U-shaped or L-shaped hook element adapted to be fixed to a part of a bone, such as a pedicle or spinous process of a vertebra, or with another device allowing connection to a bone.
  • [0018]
    In the embodiment shown in FIG. 1, head portion 12 is substantially in the shape of a W, having two outer legs or legs 16, 18, and a post 20 between legs 16, 18. Leg 16 and post 20 form a first channel 22, and leg 18 and post 20 form a second channel 24. Channels 22 and 24 are preferably substantially straight and substantially parallel, and have a lower surface 26, 28, which may be curved or form a part of a cylinder. Channels 22 and 24 are sized and shaped to accommodate a rod or other elongated element R. In one particular embodiment, channels 22 and 24 are sized to accommodate rods of the same size, as for example where the radius of curvature of surfaces 26 and 28 are equal.
  • [0019]
    Channels 22 and 24 are bounded by wall sections 32 and 34, and 36 and 38, respectively. Wall section 32 is an inner part of leg 16, wall sections 34 and 36 form sides of post 20, and wall section 38 is an inner part of leg 18. Wall sections 32 and 34 include a female thread 40, and wall sections 36 and 38 include a female thread 42. Threads 40 and 42 are adapted to accommodate set screws, such as that denoted as 44 in FIG. 1, and threads 40, 42 and set screws 44 are holders that close channel 22 and hold or lock a rod or other elongated member therein. The size of the set screw needed to close channel 22 will, of course, depend on the characteristics of thread 40, just as thread 42 will determine the size of the set screw for channel 24. If an alternative holder is desired (such as a cam lock, a sliding member, a cap or nut with threads or a bayonet-lock), threads 40 and/or 42 may be altered, removed, or replaced with other features (e.g. grooves, external threads or the like) that permit connection to such holders.
  • [0020]
    Further, in the above-described embodiment it is preferred that there be a set screw 44 and compatible threads (e.g. threads 40, 42) for each channel, i.e. a first set screw 44 for channel 22 and a second set screw 44 for channel 24. It would be possible to use one or more holders of another type, e.g. caps or nuts, to contain or lock multiple rods or other elongated members within their specific channels. For example, a cap or nut that surrounded and connected to legs 16 and 18 of head portion 12 would close both channels 22 and 24 and keep elongated member(s) therein. In that case, there would be one holder to hold one or more elongated members within their respective channels, whereas with set screws several holders (i.e. set screws) may be needed to hold several elongated members within their respective channels. It will also be observed that not all holders elements need be the same, but that screws, nuts, caps, sliders or cams can be combined for use with a given head portion.
  • [0021]
    In the embodiment of fixation member 10 in which channels 22 and 24 accommodate rods of the same size, the widths of the channels (i.e. the respective distances between walls 32 and 34 and between walls 36 and 38) will be approximately equal, and may accommodate identical set screws. On the outsides of legs 16 and 18 are found indentations 46 and 48, respectively. Indentations 46 and 48 are adapted to accommodate a holding or twisting tool, such as a screwdriver. In one embodiment, indentations 46 and 48 are substantially circular, and may have a slightly tapered opening, so that a projection on a gripping or screwing tool that has a circular or other shape can easily be inserted into indentations 46 and 48.
  • [0022]
    In the embodiment of FIG. 1, attachment portion 14 may be formed integrally with head portion 12, or may be made separately from head portion 12 and fixedly attached to head portion 12 after manufacture. Attachment portion 14 is a threaded member in the illustrated embodiment, having threads 50 adapted for insertion into a bone. Attachment portion 14 is illustrated as having a flattened end 52, but it will be understood that end 52 may also be pointed and/or self-tapping. Fixation element 10 may also be cannulated, i.e. having an aperture 54 extending from end 52 of attachment portion 14 to the top of post 20 of head portion 12. The embodiment of FIG. 1 also shows attachment portion 14 along a medial axis (i.e. equidistant from the outside edges of legs 16 and 18) of head portion 12. As shown and described below with respect to other embodiments, attachment portion 14 may be placed to one side of a medial axis, for example directly beneath one of channels 22 and 24.
  • [0023]
    In use, access to an orthopedic surgical site is obtained in a known manner. A drill or similar device is used to make a hole in a bone. For convenience, use of fixation element 10 will be described with respect to spinal surgery, although it is understood that the present invention may be used with other bony tissue or another surgical site. After a hole is drilled in a vertebra, attachment portion 14 of fixation element 10 is inserted, and fixation element 10 is rotated so that fixation element 10 is screwed into the hole. The surgeon continues turning fixation element 10 until it is in a desired position, e.g. head portion 12 is at a desired height from the surface of the vertebra, and channels 22 and 24 are oriented as the surgeon desires for a rod. When used in spinal surgery, commonly fixation element 10 will be threaded into the bone until most or all of thread 50 is within the bone, and channels 22 and 24 are oriented substantially along the spinal column or along a desired orientation of one or more spinal segments.
  • [0024]
    One or more rods or other elongated members can then be connected to fixation element 10. As shown in FIG. 1, rod R is placed in channel 22, and set screw 44 is screwed into internal thread 40 to close channel 22 and hold or lock rod R therein. Of course, rod R may also be placed in channel 24, in substantially the same manner as described above. If two rods are used, one rod may be placed in each of channels 22 and 24 and held or locked therein with set screws, as described above.
  • [0025]
    In a minimally-invasive procedure, access to the surgical site is available through one or more small openings through the skin and/or other soft tissues. Instruments suited to minimally-invasive procedures are inserted through such an opening and moved to the surgical site, where the steps described above are performed. Although this invention can be used in a variety of surgical techniques, it has been found to have significant application in minimally-invasive spinal surgery. In such procedures, it can be difficult to use screws or hooks that accommodate only a single rod or other elongated member, because of the rigidity of the corrective rod that must be implanted and because of the relative lack of mechanical advantage to adjust the spine when it is not exposed. Using the present invention, a surgeon can insert a screw or hook minimally-invasively, perform a degree of adjustment to the spine and connect a first rod that may be somewhat less rigid than is normally used in corrective spinal surgery (e.g. scoliosis-correcting surgery). The first rod holds the affected spinal segment(s) sufficiently while another, more-rigid rod is prepared and the spine adjusted to its final, corrected position. The second rod is then inserted and locked into the screws or hooks, and the surgery is completed. In some cases, it is contemplated that use of yet additional rods or other elongated members or additional spine-adjustment steps may be indicated or necessary, and thus screws or hooks that accommodate three or more rods come within the spirit of the invention.
  • [0026]
    Several other embodiments are described below. For convenience, features or aspects that are identical or similar in two or more embodiments disclosed herein are denoted in the description and drawings by numbers sharing their last two digits.
  • [0027]
    An alternative embodiment of a fixation member 110 is depicted in FIG. 4. Fixation element 110 is substantially the same as fixation member 10 with the exception that fixation member 110 has one channel (e.g. channel 124) that will accommodate a rod larger than the other (e.g. channel 122) will accommodate. Lower surface 126 of channel 122 has a smaller radius than bottom surface 128 of channel 124, and the distance between walls 132 and 134 of channel 122 is smaller than the distance between walls 136 and 138 of channel 124. A smaller set screw or other holding or locking element may be used in channel 122 compared to that used in channel 124. In other respects, fixation element 110 is essentially the same as fixation element 10.
  • [0028]
    Fixation element 110 may be used where it is preferred to have two rods of different diameters in a particular orthopedic construct. In the spinal surgical field, for example, it is common to reposition (distract, compress, rotate, or otherwise adjust relative location) vertebrae prior to or during implantation of a supporting or corrective apparatus. Connecting a smaller, less-rigid rod to fixation element 110 as described above will allow some holding or support of a spine that has been adjusted, while still allowing the surgeon to readjust the spine and/or contour a larger, more-rigid rod for providing the main support or correction to the spine.
  • [0029]
    Fixation element 110 may be placed in a vertebra as described above with respect to fixation element 10. A first rod R1 of relatively smaller diameter may be placed in channel 122, and held with a set screw 144. The surgeon can then perform additional or new repositioning procedures if he or she chooses, and may bend the locked rod in the process. While the relatively smaller rod R1 is holding the vertebra as desired, the surgeon can contour a larger rod R2 or perform other surgical procedures while the spine is held by the relatively smaller rod. The relatively larger rod R2, once prepared as the surgeon desires, can then be inserted into channel 124 of fixation element 110, and locked with another set screw 144 a.
  • [0030]
    It will be noted that in the illustrated embodiments of fixation elements 10 and 110, the attachment portion 14, 114 is substantially centered between legs 16 and 18. The present invention includes embodiments in which attachment portion 14 may be nearer to one leg or another, or it may be directly beneath one of channels 22 or 24, or have some other non-symmetrical configuration.
  • [0031]
    Turning now to FIG. 5, there is shown a fixation element 210. Fixation element 210 is similar to fixation element 10, except head portion 212 and attachment portion 214 are not initially integral with or fixed to each other. Rather, attachment portion 214 is separate from head portion 212, and is rotatable with respect to head portion 212. Like fixation element 10, fixation element 210 includes head portion 212 having two channels 222 and 224. The channels have wall sections 232, 234, 236 and 238 that are threaded with threads 240, 242. One of the channels, e.g. channel 222, communicates with a hole H that extends from the top to the bottom of head portion 212. Toward the bottom end of head portion 212, a groove 258 is set, essentially surrounding hole H.
  • [0032]
    Attachment portion 214 in this embodiment is a bone screw having bone threads 250 and a head 260, although it will be understood that hook could be provided on attachment portion 214 instead. Head 260 is substantially cylindrical, with a flange 262 at the top of head 260, and an internal print 264 within head 260 to enable attachment portion 214 to be screwed into a bone.
  • [0033]
    Fixation element 210 is assembled by inserting head 260 of attachment portion 214 into hole H of head portion 212 through the bottom end of head portion 212. A C-shaped snap ring 266 is provided to retain attachment portion 214 within head portion 212. Snap ring 266 has an inner diameter larger than the diameter of head 260, but smaller than the diameter of flange 262 of head 260. The outer diameter of snap ring 266, in its non-stressed state, is slightly larger than the diameter of groove 258 in head portion 212. Thus, attachment portion 214 is rotatable with respect to head portion 212, but not necessarily multi-axially moveable with respect to head portion 212.
  • [0034]
    To use fixation element 210, a hole in a bone (e.g. a vertebra) is prepared as described above. The assembled fixation element 210 is then coupled to the bone, by inserting the attachment portion 214 into the hole and screwing it into the bone. Attachment portion 214 may be screwed in to a point where the bottom of head portion 212 contacts bone and flange 262 presses against snap-ring 266, effectively holding attachment portion 214 with respect to head portion 212. Alternatively, attachment portion 214 can be screwed in to a lesser degree, with rotation of head portion 212 with respect to attachment portion 214 being inhibited or prevented by insertion of one or more rods into one or both channels 222, 224. Once such rod(s) are inserted into one or both of channels 222 and 224 they are locked therein, as described above with respect to fixation element 10.
  • [0035]
    Referring now to FIG. 6, there is shown an embodiment of a fixation element 310. Fixation element 310 is very similar to fixation element 210, except that attachment portion 314 is configured so that its connection with head portion 312 is a multi-axial connection. A preferred configuration for the connection between head portion 312 and attachment portion 314 is disclosed in U.S. Pat. No. 6,280,445 to Barker et al., the entirety of which is incorporated by reference. Accordingly, attachment portion 314 includes a rounded head 360 that sits within hole H of head portion 312, and is retained therein by a C-shaped snap ring 366 seated in groove 358. A crown member 370 sets atop the head 360 of attachment portion 314.
  • [0036]
    Fixation element 310 is connected to a bone in essentially the same fashion as fixation element 210 described above. After attachment portion 314 is screwed into the bone, head portion 312 may be adjusted multi-axially with respect to attachment portion 314. A rod is introduced into channel 322, and any further multi-axial adjustments of head portion 312 with respect to attachment portion 314 can be made. A set screw 344 is threaded into threads 340 communicating with channel 322. Locking down set screw 344 presses the rod down on crown member 370, which locks head 360 of attachment portion 314 between crown member 370 and snap ring 362. In a particular embodiment, head 360 may have ridges 372 that are somewhat harder than the material of crown member 370, so that crown member 370 and head 360 are locked together by ridges 372 biting into crown member 370.
  • [0037]
    Referring now to FIG. 7, a further embodiment of a fixation element 410 is disclosed. Fixation element 410 includes a head portion 412 and an attachment portion 414. In fixation element 410, head portion 412 and attachment portion 414 may be integral or initially fixed with each other (as in fixation member 10), rotatable with respect to each other (as in fixation member 210), or multi-axially connected (as in fixation member 310). Head portion 412 includes an underside 456 having an approximately anatomically-shaped curvature. In a specific embodiment, the curvature has a concave aspect that approximates the curvature of a side of a vertebra. In another embodiment, the curvature may have a concave aspect in a first cross-section and a convex aspect in a second cross-section, e.g. one perpendicular to the first cross-section. Extending from surface 456 is a prong or spike 474. Spike 474 is intended to be inserted into the bone tissue when fixation element 410 is attached to a bone, to provide yet further stability to the implant construct. In other respects, fixation element 410 can have any of the features or attributes of fixation elements 10, 110, 210, and/or 310.
  • [0038]
    Referring now to FIG. 8, fixation element 510 in yet another embodiment is disclosed. Fixation element 510 may include attributes or features from any of fixation elements 10, 110, 210, and/or 310, wherein an attachment portion 514 is not centered with respect to head portion 512, or is beneath one channel (e.g. channel 522) of head portion 512. In addition, fixation element 510 includes a second attachment portion 514 a connected to head portion 512. In a specific embodiment, head portion 512 can include a hole H′ communicating with channel 524 and extending from bottom surface 556 through head portion 512. Attachment portion 514 a can be similar to attachment portion 214 or 314, in which case the features of fixation elements 210 and/or 310 providing for connection between the respective attachment portions and head portions would be included in fixation element 510. Alternatively, attachment portion 514 a may be a standard bone screw with a curvate head 562 and an internal print 564, that could rest against the lower edge of the hole H′. In that case, an additional hole 580 may be provided that communicates with hole H′, and is threaded to accommodate a set screw (not shown) therein, which can lock attachment portion 514 a within hole H′ in a desired orientation.
  • [0039]
    Fixation element 510 is attached to a bone in substantially the same fashion as described above, except an additional hole must be drilled in a bone to accommodate attachment portion 514 a. As one example, attachment portion 514 can be threaded into the bone, and attachment portion 514 a can then be threaded into the second hole in the bone and used to make adjustments in the positioning of fixation element 510 with respect to the bone. One or more rods may be inserted in channels 522 and 524, and fixation element 510 locked with respect to the rods by threading set screws down on them, as described above.
  • [0040]
    Referring now to FIG. 9, there is shown an embodiment 610 of a fixation element. Fixation element 610 has a U-shaped head portion 612 with a single channel 622 therethrough, and is connected to an attachment portion 614 which in a specific embodiment is a threaded screw portion. Walls 632 and 634 of channel 622 include threads 640 for accommodating a set screw 644. Walls 632 and 634 are of a height that enables insertion of two separate rods within channel 622 of head portion 612. Thus, for a fixation element 610 intended to accommodate two rods of 5.5 mm diameter, the height of walls 632 and 634 would be at least 11 mm plus the height of set screw(s) 644. With reference to FIG. 9, rod R1 is placed within channel 622, followed by a set screw 644, screwed into thread 640. A second rod R2 would be placed atop set screw 644, and a second set screw 644 would be threaded into threads 640 to lock the second rod R2 with respect to head portion 612.
  • [0041]
    The diameters of rods R1 and R2 could be equal or they may be different to provide adjustability and stability prior to final locking down as described above. It will also be noted that a configuration of head portion 612 to accommodate two rods may be combined with a multi-axial head portion/attachment portion connection (such as those shown in U.S. Pat. No. 5,797,911 to Sherman et al. and U.S. Pat. No. 6,280,445 to Barker et al., the entireties of which are incorporated herein by reference), or could be rotational with respect to each other as shown above with respect to fixation member 210. Further, although channel 622 is shown as extending from a back or proximal surface of head portion 612 toward attachment portion 614, it will be understood that channel 622 could extend laterally, i.e. from a side surface of head portion 612 toward an opposite side surface. Two rods or other elongated members could then be inserted into channel 622 from the side and fixed with respect to head portion 612 substantially as described above, or as described further below with respect to FIGS. 10 and 11.
  • [0042]
    Yet a further embodiment is shown in FIG. 10. A fixation element 710 is provided with a head portion 712 and an attachment portion 714. In this embodiment, head portion 712 has channels 722 and 724. Channel 722, like channel 22 in FIG. 1, is substantially straight, extends through head portion 712, and is open to the back (i.e. the portion opposite attachment portion 714) of head portion 712. Channel 724 is also substantially straight and extends through head portion 712, but channel 724 opens to the side of head portion 712. Thus, head portion 712 has one channel that is “back-loading” for one elongated member (e.g. rod R1 in FIG. 4 or 9) and “side-loading” for another elongated member (e.g. rod R2 in FIG. 4 or 9).
  • [0043]
    Head portion 712 may also include a hole 782 from the back of head portion 712 to channel 724. Hole 782 may be internally threaded and accommodate a set screw 784, which is used to lock a rod within channel 724. In one embodiment, set screw 784 has a threaded portion 786, and may also have a conically-shaped or tapered end portion 788. It will be understood that any of several types of holder or locking member, including a set screw 744 (threaded into hole 782 or into channel 724 from the side of head portion 712) or other holder(s) described above, can be used. Channel 722 is configured to accommodate a holder such as set screw 744 or other holder(s) described above.
  • [0044]
    Head portion 712 is shown in this embodiment to be fixed with respect to attachment portion 714, with attachment portion 714 substantially in the middle of head portion 712. Of course, attachment portion 714 may be rotatably or multi-axially connected to head portion 712, or located toward one side of head portion 712, or multiple attachment portions 714 may be provided, as described in detail above.
  • [0045]
    Another embodiment of a fixation element 810 is shown in FIG. 11. Fixation element 810 is much like fixation element 710, with the exception that both channels 822 and 824 are open to the sides of head portion 812 of fixation element 810. In one particular embodiment, holes 882 a and 882 b are provided to communicated with channels 822 and 824. Holes 882 a and 882 b may be internally threaded (as described above) to accommodate set screws such as 884 a and 884 b, or may be configured to accommodate alternative holders, as described above. As with fixation element 710, attachment portion 814 of fixation element 810 may be rotatably or multi-axially connected to head portion 812, or located toward one side of head portion 812, or multiple attachment portions 814 may be provided, as described in detail above.
  • [0046]
    The implants described above are preferably made from a biocompatible material such as stainless steel, titanium, plastics or other sturdy biocompatible and/or resorbable materials. The elongated members may be flexible or rigid rods, cables or similar items. It is envisioned that well-known open and minimally-invasive surgical procedures may be used to implant embodiments of the present invention.
  • [0047]
    The size of the implants described above may be identical or similar to implants currently used in spinal and other orthopedic surgeries. It has been found that the implants described above may have particular application to smaller vertebrae or other bones (e.g. those in children or other small persons, or adult cervical vertebrae), since one implant attaching to a bone can accommodate two rods or other elongated members. Accordingly, these implants may be made in standard and smaller sizes for such uses.
  • [0048]
    While the invention has been illustrated and described in detail in the drawings and foregoing description, the same is to be considered as illustrative and not restrictive in character, it being understood that only the preferred embodiment has been shown and described and that all changes and modifications that come within the spirit of the invention are desired to be protected. For example, while the embodiments described above have two channels (e.g. channels 22 and 24) for accommodating longitudinal supports, the present invention contemplates fixation elements with head portions having a larger number of channels or that can accommodate more than two rods or other support members. Further, it will be seen that aspects of one embodiment described above can be incorporated into another of the embodiments. For example, the “stacked rod” feature of fixation element 610 could be included with fixation element 10. In that case, one of the channels of fixation element 10 would be of a height sufficient to place one rod atop another in that channel, as described with respect to fixation element 610. Still further, it will be seen that the channel or channels may be differently oriented, as for example opening to the side of the head portion.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2002 *Mar 12, 1841 Tor and planter for plowing
US4719905 *Dec 1, 1986Jan 19, 1988Acromed CorporationApparatus and method for maintaining vertebrae in a desired relationship
US4771767 *Feb 3, 1986Sep 20, 1988Acromed CorporationApparatus and method for maintaining vertebrae in a desired relationship
US4805602 *Nov 3, 1986Feb 21, 1989Danninger Medical TechnologyTranspedicular screw and rod system
US4946458 *Feb 28, 1989Aug 7, 1990Harms JuergenPedicle screw
US5005562 *Jun 21, 1989Apr 9, 1991Societe De Fabrication De Material OrthopediqueImplant for spinal osteosynthesis device, in particular in traumatology
US5030220 *Mar 29, 1990Jul 9, 1991Advanced Spine Fixation Systems IncorporatedSpine fixation system
US5092867 *Jul 11, 1989Mar 3, 1992Harms JuergenCorrection and supporting apparatus, in particular for the spinal column
US5102412 *Jun 19, 1990Apr 7, 1992Chaim RogozinskiSystem for instrumentation of the spine in the treatment of spinal deformities
US5176680 *Feb 8, 1991Jan 5, 1993Vignaud Jean LouisDevice for the adjustable fixing of spinal osteosynthesis rods
US5207676 *Apr 23, 1991May 4, 1993Jaquet Orthopedie S.A.External fixator with controllable damping
US5207678 *Jan 7, 1992May 4, 1993PruferPedicle screw and receiver member therefore
US5217497 *Jul 3, 1991Jun 8, 1993Mehdian Seyed M HApparatus for use in the treatment of spinal disorders
US5261909 *Feb 18, 1992Nov 16, 1993Danek Medical, Inc.Variable angle screw for spinal implant system
US5261912 *Aug 15, 1991Nov 16, 1993Synthes (U.S.A.)Implant for an osteosynthesis device, in particular for spinal column correction
US5360431 *Apr 26, 1990Nov 1, 1994Cross Medical ProductsTranspedicular screw system and method of use
US5368593 *Jul 7, 1992Nov 29, 1994Stark; John G.Devices and methods for attachment of spine fixation devices
US5443467 *Feb 18, 1994Aug 22, 1995Biedermann Motech GmbhBone screw
US5466237 *Nov 19, 1993Nov 14, 1995Cross Medical Products, Inc.Variable locking stabilizer anchor seat and screw
US5474555 *Aug 3, 1994Dec 12, 1995Cross Medical ProductsSpinal implant system
US5476464 *Feb 18, 1994Dec 19, 1995Howmedica GmbhDevice for setting a spine
US5501684 *Jun 25, 1992Mar 26, 1996Synthes (U.S.A.)Osteosynthetic fixation device
US5520689 *Mar 8, 1995May 28, 1996Synthes (U.S.A.)Osteosynthetic fastening device
US5520690 *Apr 13, 1995May 28, 1996Errico; Joseph P.Anterior spinal polyaxial locking screw plate assembly
US5531746 *May 22, 1995Jul 2, 1996Fastenetix, L.L.C.Posterior spinal polyaxial locking lateral mass screw plate assembly
US5549608 *Jul 13, 1995Aug 27, 1996Fastenetix, L.L.C.Advanced polyaxial locking screw and coupling element device for use with rod fixation apparatus
US5554157 *Jul 14, 1995Sep 10, 1996Fastenetix, L.L.C.Rod securing polyaxial locking screw and coupling element assembly
US5562663 *Jun 7, 1995Oct 8, 1996Danek Medical, Inc.Implant interconnection mechanism
US5569247 *Mar 27, 1995Oct 29, 1996Smith & Nephew Richards, Inc.Enhanced variable angle bone bolt
US5575792 *Oct 13, 1995Nov 19, 1996Fastenetix, L.L.C.Extending hook and polyaxial coupling element device for use with top loading rod fixation devices
US5578033 *Oct 13, 1995Nov 26, 1996Fastenetix, L.L.C.Advanced polyaxial locking hook and coupling element device for use with side loading rod fixation devices
US5584833 *Apr 25, 1995Dec 17, 1996Soprane S.A.Device for retaining a connecting rod of a spine fixator on a pedicular screw
US5584834 *Jul 14, 1995Dec 17, 1996Fastenetix, L.L.C.Polyaxial locking screw and coupling element assembly for use with side loading rod fixation apparatus
US5586984 *Jul 14, 1995Dec 24, 1996Fastenetix, L.L.C.Polyaxial locking screw and coupling element assembly for use with rod fixation apparatus
US5601554 *Nov 3, 1994Feb 11, 1997Advanced Spine Fixation Systems, Inc.Branch connector for spinal fixation systems
US5607426 *Feb 23, 1996Mar 4, 1997Fastenletix, L.L.C.Threaded polyaxial locking screw plate assembly
US5609593 *Oct 13, 1995Mar 11, 1997Fastenetix, LlcAdvanced polyaxial locking hook and coupling element device for use with top loading rod fixation devices
US5609594 *Oct 13, 1995Mar 11, 1997Fastenetix LlcExtending hook and polyaxial coupling element device for use with side loading road fixation devices
US5669911 *Jun 13, 1996Sep 23, 1997Fastenetix, L.L.C.Polyaxial pedicle screw
US5672176 *Mar 5, 1996Sep 30, 1997Biedermann; LutzAnchoring member
US5688273 *Oct 23, 1995Nov 18, 1997Fastenetix, Llc.Spinal implant apparatus having a single central rod and plow hooks
US5702395 *Nov 10, 1993Dec 30, 1997Sofamor S.N.C.Spine osteosynthesis instrumentation for an anterior approach
US5879350 *Sep 24, 1996Mar 9, 1999Sdgi Holdings, Inc.Multi-axial bone screw assembly
US5928232 *Apr 4, 1996Jul 27, 1999Advanced Spine Fixation Systems, IncorporatedSpinal fixation system
US5993449 *Nov 30, 1995Nov 30, 1999Synthes (Usa)Bone-fixing device
US6136002 *Feb 5, 1999Oct 24, 2000Industrial Technology Research InstituteAnterior spinal fixation system
US6193721 *Feb 11, 1998Feb 27, 2001Gary K. MichelsonMulti-lock anterior cervical plating system
US6206879 *Oct 22, 1999Mar 27, 2001Aesculap Ag & Co. KgOsteosynthetic holding system
US6302888 *Mar 19, 1999Oct 16, 2001Interpore Cross InternationalLocking dovetail and self-limiting set screw assembly for a spinal stabilization member
US6488681 *Jan 5, 2001Dec 3, 2002Stryker Spine S.A.Pedicle screw assembly
US6602253 *Feb 12, 2001Aug 5, 2003Marc RichelsophRod to rod connector
US6616669 *Jul 13, 2001Sep 9, 2003Sdgi Holdings, Inc.Method for the correction of spinal deformities through vertebral body tethering without fusion
US6660004 *Aug 28, 2001Dec 9, 2003Sdgi Holdings, Inc.Multi-axial bone screw assembly
US6702817 *Jan 3, 2002Mar 9, 2004Aesculap Ag & Co. KgLocking mechanism for a bone screw
US6706044 *Apr 17, 2002Mar 16, 2004Spineology, Inc.Stacked intermedular rods for spinal fixation
US6783527 *Oct 30, 2001Aug 31, 2004Sdgi Holdings, Inc.Flexible spinal stabilization system and method
US7166108 *Dec 7, 2001Jan 23, 2007Abbott SpineDevice for fixing a rod and a spherical symmetry screw head
US7186255 *Aug 12, 2004Mar 6, 2007Atlas Spine, Inc.Polyaxial screw
US7250052 *Oct 30, 2003Jul 31, 2007Abbott Spine Inc.Spinal stabilization systems and methods
US7491218 *Oct 30, 2003Feb 17, 2009Abbott Spine, Inc.Spinal stabilization systems and methods using minimally invasive surgical procedures
US20010010000 *Mar 12, 2001Jul 26, 2001Stanley GertzbeinSpinal rod transverse connectors
US20030045874 *Aug 31, 2001Mar 6, 2003Thomas James C.Transverse connector assembly for spine fixation system
US20040254577 *Oct 18, 2002Dec 16, 2004Joel DelecrinProgressive approach osteosynthesis device and preassembly method
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7377923May 19, 2004May 27, 2008Alphatec Spine, Inc.Variable angle spinal screw assembly
US7942900Aug 1, 2007May 17, 2011Spartek Medical, Inc.Shaped horizontal rod for dynamic stabilization and motion preservation spinal implantation system and method
US7942901Apr 24, 2006May 17, 2011Warsaw Orthopedic, Inc.Connector apparatus
US7942902Nov 16, 2007May 17, 2011Warsaw Orthopedic, Inc.Bone anchor and spinal alignment system
US7963978May 30, 2008Jun 21, 2011Spartek Medical, Inc.Method for implanting a deflection rod system and customizing the deflection rod system for a particular patient need for dynamic stabilization and motion preservation spinal implantation system
US7985243May 30, 2008Jul 26, 2011Spartek Medical, Inc.Deflection rod system with mount for a dynamic stabilization and motion preservation spinal implantation system and method
US7993372May 30, 2008Aug 9, 2011Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system with a shielded deflection rod system and method
US8002800Aug 1, 2007Aug 23, 2011Spartek Medical, Inc.Horizontal rod with a mounting platform for a dynamic stabilization and motion preservation spinal implantation system and method
US8002803May 30, 2008Aug 23, 2011Spartek Medical, Inc.Deflection rod system for a spine implant including an inner rod and an outer shell and method
US8007518Sep 24, 2009Aug 30, 2011Spartek Medical, Inc.Load-sharing component having a deflectable post and method for dynamic stabilization of the spine
US8012175Aug 1, 2007Sep 6, 2011Spartek Medical, Inc.Multi-directional deflection profile for a dynamic stabilization and motion preservation spinal implantation system and method
US8012181Sep 24, 2009Sep 6, 2011Spartek Medical, Inc.Modular in-line deflection rod and bone anchor system and method for dynamic stabilization of the spine
US8016861Sep 24, 2009Sep 13, 2011Spartek Medical, Inc.Versatile polyaxial connector assembly and method for dynamic stabilization of the spine
US8021396Sep 24, 2009Sep 20, 2011Spartek Medical, Inc.Configurable dynamic spinal rod and method for dynamic stabilization of the spine
US8043337Jun 11, 2007Oct 25, 2011Spartek Medical, Inc.Implant system and method to treat degenerative disorders of the spine
US8048113May 30, 2008Nov 1, 2011Spartek Medical, Inc.Deflection rod system with a non-linear deflection to load characteristic for a dynamic stabilization and motion preservation spinal implantation system and method
US8048115Sep 24, 2009Nov 1, 2011Spartek Medical, Inc.Surgical tool and method for implantation of a dynamic bone anchor
US8048121May 30, 2008Nov 1, 2011Spartek Medical, Inc.Spine implant with a defelction rod system anchored to a bone anchor and method
US8048122May 30, 2008Nov 1, 2011Spartek Medical, Inc.Spine implant with a dual deflection rod system including a deflection limiting sheild associated with a bone screw and method
US8048123May 30, 2008Nov 1, 2011Spartek Medical, Inc.Spine implant with a deflection rod system and connecting linkages and method
US8048125Sep 24, 2009Nov 1, 2011Spartek Medical, Inc.Versatile offset polyaxial connector and method for dynamic stabilization of the spine
US8048128Aug 1, 2007Nov 1, 2011Spartek Medical, Inc.Revision system and method for a dynamic stabilization and motion preservation spinal implantation system and method
US8052721Aug 1, 2007Nov 8, 2011Spartek Medical, Inc.Multi-dimensional horizontal rod for a dynamic stabilization and motion preservation spinal implantation system and method
US8052722May 30, 2008Nov 8, 2011Spartek Medical, Inc.Dual deflection rod system for a dynamic stabilization and motion preservation spinal implantation system and method
US8057514May 30, 2008Nov 15, 2011Spartek Medical, Inc.Deflection rod system dimensioned for deflection to a load characteristic for dynamic stabilization and motion preservation spinal implantation system and method
US8057515Sep 24, 2009Nov 15, 2011Spartek Medical, Inc.Load-sharing anchor having a deflectable post and centering spring and method for dynamic stabilization of the spine
US8057517Sep 24, 2009Nov 15, 2011Spartek Medical, Inc.Load-sharing component having a deflectable post and centering spring and method for dynamic stabilization of the spine
US8066747Aug 1, 2007Nov 29, 2011Spartek Medical, Inc.Implantation method for a dynamic stabilization and motion preservation spinal implantation system and method
US8070774Aug 1, 2007Dec 6, 2011Spartek Medical, Inc.Reinforced bone anchor for a dynamic stabilization and motion preservation spinal implantation system and method
US8070775May 30, 2008Dec 6, 2011Spartek Medical, Inc.Deflection rod system for a dynamic stabilization and motion preservation spinal implantation system and method
US8070776May 30, 2008Dec 6, 2011Spartek Medical, Inc.Deflection rod system for use with a vertebral fusion implant for dynamic stabilization and motion preservation spinal implantation system and method
US8070780Aug 1, 2007Dec 6, 2011Spartek Medical, Inc.Bone anchor with a yoke-shaped anchor head for a dynamic stabilization and motion preservation spinal implantation system and method
US8080039Aug 1, 2007Dec 20, 2011Spartek Medical, Inc.Anchor system for a spine implantation system that can move about three axes
US8083772Sep 24, 2009Dec 27, 2011Spartek Medical, Inc.Dynamic spinal rod assembly and method for dynamic stabilization of the spine
US8083775Sep 24, 2009Dec 27, 2011Spartek Medical, Inc.Load-sharing bone anchor having a natural center of rotation and method for dynamic stabilization of the spine
US8092501Sep 24, 2009Jan 10, 2012Spartek Medical, Inc.Dynamic spinal rod and method for dynamic stabilization of the spine
US8097022 *Feb 20, 2007Jan 17, 2012Warsaw Orthopedic, Inc.Flexible coupling members for spinal stabilization members
US8097024Sep 24, 2009Jan 17, 2012Spartek Medical, Inc.Load-sharing bone anchor having a deflectable post and method for stabilization of the spine
US8105356Aug 1, 2007Jan 31, 2012Spartek Medical, Inc.Bone anchor with a curved mounting element for a dynamic stabilization and motion preservation spinal implantation system and method
US8105359May 30, 2008Jan 31, 2012Spartek Medical, Inc.Deflection rod system for a dynamic stabilization and motion preservation spinal implantation system and method
US8109970May 30, 2008Feb 7, 2012Spartek Medical, Inc.Deflection rod system with a deflection contouring shield for a spine implant and method
US8114130May 30, 2008Feb 14, 2012Spartek Medical, Inc.Deflection rod system for spine implant with end connectors and method
US8114134Sep 24, 2009Feb 14, 2012Spartek Medical, Inc.Spinal prosthesis having a three bar linkage for motion preservation and dynamic stabilization of the spine
US8118842Aug 1, 2007Feb 21, 2012Spartek Medical, Inc.Multi-level dynamic stabilization and motion preservation spinal implantation system and method
US8142480Aug 1, 2007Mar 27, 2012Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system with horizontal deflection rod and articulating vertical rods
US8147520Aug 1, 2007Apr 3, 2012Spartek Medical, Inc.Horizontally loaded dynamic stabilization and motion preservation spinal implantation system and method
US8162987Aug 1, 2007Apr 24, 2012Spartek Medical, Inc.Modular spine treatment kit for dynamic stabilization and motion preservation of the spine
US8172881Aug 1, 2007May 8, 2012Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system and method with a deflection rod mounted in close proximity to a mounting rod
US8172882Jun 11, 2007May 8, 2012Spartek Medical, Inc.Implant system and method to treat degenerative disorders of the spine
US8177815Aug 1, 2007May 15, 2012Spartek Medical, Inc.Super-elastic deflection rod for a dynamic stabilization and motion preservation spinal implantation system and method
US8177816 *Sep 5, 2007May 15, 2012Schwab Frank JVertebral anchor
US8182513 *Nov 24, 2006May 22, 2012Lanx, S.R.L.Modular vertebral stabilizer
US8182515Aug 1, 2007May 22, 2012Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system and method
US8182516Aug 1, 2007May 22, 2012Spartek Medical, Inc.Rod capture mechanism for dynamic stabilization and motion preservation spinal implantation system and method
US8192468 *Dec 21, 2006Jun 5, 2012Biedermann Technologies Gmbh & Co. KgDynamic stabilization device for bones or vertebrae
US8192469Aug 1, 2007Jun 5, 2012Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system and method with a deflection rod
US8211150Aug 1, 2007Jul 3, 2012Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system and method
US8211155Sep 24, 2009Jul 3, 2012Spartek Medical, Inc.Load-sharing bone anchor having a durable compliant member and method for dynamic stabilization of the spine
US8211156Jan 25, 2008Jul 3, 2012Andersen Bruce JOsteoporatic screw and expansion sleeve
US8216281Dec 2, 2009Jul 10, 2012Spartek Medical, Inc.Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod
US8257397Dec 2, 2010Sep 4, 2012Spartek Medical, Inc.Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod
US8267979Sep 24, 2009Sep 18, 2012Spartek Medical, Inc.Load-sharing bone anchor having a deflectable post and axial spring and method for dynamic stabilization of the spine
US8298265May 23, 2008Oct 30, 2012Thomas PurcellVariable angle spinal screw assembly
US8298267May 30, 2008Oct 30, 2012Spartek Medical, Inc.Spine implant with a deflection rod system including a deflection limiting shield associated with a bone screw and method
US8313515 *Jun 15, 2007Nov 20, 2012Rachiotek, LlcMulti-level spinal stabilization system
US8317836Nov 10, 2009Nov 27, 2012Spartek Medical, Inc.Bone anchor for receiving a rod for stabilization and motion preservation spinal implantation system and method
US8333792Sep 24, 2009Dec 18, 2012Spartek Medical, Inc.Load-sharing bone anchor having a deflectable post and method for dynamic stabilization of the spine
US8337536Sep 24, 2009Dec 25, 2012Spartek Medical, Inc.Load-sharing bone anchor having a deflectable post with a compliant ring and method for stabilization of the spine
US8361123Oct 16, 2009Jan 29, 2013Depuy Spine, Inc.Bone anchor assemblies and methods of manufacturing and use thereof
US8361129Apr 27, 2007Jan 29, 2013Depuy Spine, Inc.Large diameter bone anchor assembly
US8372122Apr 29, 2011Feb 12, 2013Spartek Medical, Inc.Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod
US8394127Jun 27, 2012Mar 12, 2013Spartek Medical, Inc.Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod
US8430916Feb 7, 2012Apr 30, 2013Spartek Medical, Inc.Spinal rod connectors, methods of use, and spinal prosthesis incorporating spinal rod connectors
US8518085Jan 27, 2011Aug 27, 2013Spartek Medical, Inc.Adaptive spinal rod and methods for stabilization of the spine
US8535352 *Mar 28, 2008Sep 17, 2013Exactech, Inc.Multi-level minimally invasive spinal stabilization system
US8568451Nov 10, 2009Oct 29, 2013Spartek Medical, Inc.Bone anchor for receiving a rod for stabilization and motion preservation spinal implantation system and method
US8636775Aug 2, 2012Jan 28, 2014Thomas PurcellVariable angle spinal screw assembly
US8657857 *Nov 5, 2009Feb 25, 2014Dalmatic Lystrup A/SBone fixation device
US8758411Oct 25, 2012Jun 24, 2014Nuvasive, Inc.Implants and methods for treating spinal disorders
US8795336Sep 30, 2009Aug 5, 2014Biedermann Technologies Gmbh & Co. KgBone anchoring device and stabilization device for bone parts or vertebrae comprising such a bone anchoring device
US8979902May 22, 2012Mar 17, 2015Biedermann Technologies Gmbh & Co. KgDynamic stabilization device for bones or vertebrae
US9050141Feb 2, 2009Jun 9, 2015Texas Scottish Rite Hospital For ChildrenPedicle screw
US9055980 *Jul 28, 2010Jun 16, 2015Biedermann Technologies Gmbh & Co. KgBone anchoring device
US9101403Aug 31, 2009Aug 11, 2015Biedermann Technologies Gmbh & Co. KgBone anchoring element and stabilization device for bones, in particular for the spinal column
US9119676 *Dec 21, 2012Sep 1, 2015DePuy Synthes Products, Inc.Bone screw fixation
US9161782Jan 14, 2013Oct 20, 2015DePuy Synthes Products, Inc.Bone anchor assemblies and methods of manufacturing and use thereof
US9241739Sep 11, 2009Jan 26, 2016DePuy Synthes Products, Inc.Spinal stabilizing and guiding fixation system
US9283002Jun 20, 2013Mar 15, 2016Zimmer SpineOrthopaedic device and methods for its pre-assembly and assembly
US9345517 *Nov 8, 2012May 24, 2016Globus Medical, Inc.Pedicle screw having a removable rod coupling
US9408641 *Feb 2, 2009Aug 9, 2016Globus Medical, Inc.Spinal rod link reducer
US9439679Apr 15, 2014Sep 13, 2016Dalmatic Lystrup A/SBone fixation system
US9510862Jun 17, 2010Dec 6, 2016DePuy Synthes Products, Inc.Revision connector for spinal constructs
US9526526 *Apr 29, 2015Dec 27, 2016Globus Medical, Inc.Pedicle screw
US9526527 *Feb 5, 2016Dec 27, 2016Globus Medical, Inc.Pedicle screw having a removable rod coupling
US9579126 *Mar 1, 2012Feb 28, 2017Globus Medical, Inc.Spinal rod link reducer
US20040236330 *May 19, 2004Nov 25, 2004Thomas PurcellVariable angle spinal screw assembly
US20070191844 *Jan 31, 2006Aug 16, 2007Sdgi Holdings, Inc.In-series, dual locking mechanism device
US20070225708 *Dec 21, 2006Sep 27, 2007Lutz BiedermannDynamic stabilization device for bones or vertebrae
US20070270816 *Apr 24, 2006Nov 22, 2007Sdgi Holdings, Inc.Connector apparatus
US20070270817 *Apr 24, 2006Nov 22, 2007Sdgi Holdings, Inc.Connector apparatus
US20070270818 *Apr 24, 2006Nov 22, 2007Sdgi Holdings, Inc.Connector apparatus
US20080015580 *Apr 27, 2007Jan 17, 2008Nam ChaoLarge diameter bone anchor assembly
US20080058805 *Aug 28, 2006Mar 6, 2008Microdexterity Systems, Inc.Spinal fusion implant
US20080058818 *Sep 5, 2007Mar 6, 2008Schwab Frank JVertebral Anchor
US20080086130 *Oct 6, 2006Apr 10, 2008Depuy Spine, Inc.Torsionally stable fixation
US20080183215 *Mar 28, 2008Jul 31, 2008Moti AltaracMulti-level minimally invasive spinal stabilization system
US20080234743 *Feb 20, 2007Sep 25, 2008Warsaw Orthopedic, Inc.Flexible coupling members for spinal stabilization members
US20080262546 *Nov 24, 2006Oct 23, 2008Giuseppe CalvosaModular Vertebral Stabilizer
US20080269810 *Apr 11, 2008Oct 30, 2008Texas Scottish Rite Hospital For ChildrenOrthopedic Fastener for Stabilization and Fixation
US20080312692 *Jun 15, 2007Dec 18, 2008Terrence BrennanMulti-level spinal stabilization system
US20090131982 *Nov 16, 2007May 21, 2009Frank Johann SchwabBone anchor and spinal alignment system
US20090192552 *Jan 25, 2008Jul 30, 2009Andersen Bruce JOsteoporatic screw and expansion sleeve
US20090198273 *Feb 2, 2009Aug 6, 2009Texas Scottish Rite Hospital For ChildrenPedicle Screw
US20090198279 *Feb 2, 2009Aug 6, 2009Texas Scottish Rite Hospital For ChildrenSpinal Rod Link Reducer
US20100087865 *Sep 30, 2009Apr 8, 2010Lutz BiedermannBone anchoring device and stabilization device for bone parts or vertebrae comprising such a bone anchoring device
US20100094348 *Aug 31, 2009Apr 15, 2010Lutz BiedermannBone anchoring element and stabilization device for bones, in particular for the spinal column
US20100174320 *Jan 6, 2010Jul 8, 2010Dfine, Inc.Bone anchor apparatus and method
US20100234892 *Oct 15, 2009Sep 16, 2010Keyvan MazdaSpinal interconnecting device and a stabilizing system using said device
US20100324599 *Jun 17, 2010Dec 23, 2010Albert MontelloRevision connector for spinal constructs
US20110034957 *Jul 28, 2010Feb 10, 2011Markku BiedermannBone anchoring device
US20110106166 *Apr 15, 2010May 5, 2011Tom KeyerRevision connector for spinal constructs
US20110245883 *Nov 5, 2009Oct 6, 2011Vagn Erik DallBone Fixation Device
US20120221057 *Mar 1, 2012Aug 30, 2012Texas Scottish Rite Hospital For ChildrenSpinal Rod Link Reducer
US20130090691 *Nov 8, 2012Apr 11, 2013Texas Scottish Rite Hospital For ChildrenPedicle screw having a removable rod coupling
US20130123854 *Nov 15, 2012May 16, 2013Dimitriy G. KondrashovSystem and method for spinal stabilization through mutli-head spinal screws
US20130338715 *Dec 21, 2012Dec 19, 2013Depuy Spine, Inc.Bone screw fixation
US20140018858 *Jul 9, 2013Jan 16, 2014Bruno LaengDevice, Kit and Method for Correction of Spinal Deformity
US20150223844 *Apr 22, 2015Aug 13, 2015Globus Medical, Inc.Orthopedic fixation devices and methods of installation thereof
US20150359568 *Jun 13, 2014Dec 17, 2015Warsaw Orthopedic, Inc.Bone fastener and methods of use
US20160008035 *Jul 13, 2015Jan 14, 2016Biedermann Technologies Gmbh & Co. KgBone anchoring element and stabilization device for bones, in particular for the spinal column
US20160128732 *Nov 11, 2015May 12, 2016Intrepid OrthopedicsSupplemental Fixation Screw
US20160220279 *Feb 5, 2016Aug 4, 2016Globus Medical, Inc.Pedicle screw having a removable rod coupling
CN102368967A *Apr 15, 2010Mar 7, 2012斯恩蒂斯有限公司Revision connector for spinal constructs
CN102573679A *Jul 19, 2010Jul 11, 2012思邦科技脊柱智慧集团股份公司Spine fixation system
EP2160989A1 *Sep 5, 2008Mar 10, 2010BIEDERMANN MOTECH GmbHBone anchoring element and stabilization device for bones in particular for the spinal column
EP2174608A1 *Oct 8, 2008Apr 14, 2010BIEDERMANN MOTECH GmbHBone anchoring device and stabilization device for bone parts or vertebrae
EP2484300A1 *Sep 5, 2008Aug 8, 2012Biedermann Technologies GmbH & Co. KGBone anchoring element and stabilization device for bones, in particular for the spinal column
WO2007060534A2 *Nov 24, 2006May 31, 2007Giuseppe CalvosaModular vertebral stabilizer
WO2007060534A3 *Nov 24, 2006Nov 29, 2007Giuseppe CalvosaModular vertebral stabilizer
WO2009064831A1 *Nov 13, 2008May 22, 2009Warsaw Orthopedic, Inc.Bone anchor and spinal alignment system
WO2010030906A1 *Sep 11, 2009Mar 18, 2010Synthes Usa, LlcSpinal stabilizing and guiding fixation system
WO2011012236A1 *Jul 19, 2010Feb 3, 2011Copf Franz JunSpine fixation system
WO2014011580A1 *Jul 9, 2013Jan 16, 2014DePuy Synthes Products, LLCDevice, kit and method for correction of spinal deformity
Classifications
U.S. Classification606/265, 606/269, 606/279, 606/270, 606/276
International ClassificationA61B17/70
Cooperative ClassificationA61B17/7037, A61B17/7044, A61B17/7032, A61B17/7034, A61B17/7001, A61B17/8605
European ClassificationA61B17/70B, A61B17/70B8, A61B17/70B2, A61B17/70B5B, A61B17/70B2L
Legal Events
DateCodeEventDescription
Feb 27, 2003ASAssignment
Owner name: SDGI HOLDINGS, INC., DELAWARE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PICETTI, GEORGE;MELKENT, ANTHONY J.;YOUNG, JOHN STEWART;REEL/FRAME:013778/0725
Effective date: 20030212
Feb 20, 2008ASAssignment
Owner name: WARSAW ORTHOPEDIC, INC., INDIANA
Free format text: MERGER;ASSIGNOR:SDGI HOLDINGS, INC.;REEL/FRAME:020534/0610
Effective date: 20060428