Recherche Images Maps Play YouTube Actualités Gmail Drive Plus »
Connexion
Les utilisateurs de lecteurs d'écran peuvent cliquer sur ce lien pour activer le mode d'accessibilité. Celui-ci propose les mêmes fonctionnalités principales, mais il est optimisé pour votre lecteur d'écran.

Brevets

  1. Recherche avancée dans les brevets
Numéro de publicationUS20040111088 A1
Type de publicationDemande
Numéro de demandeUS 10/313,171
Date de publication10 juin 2004
Date de dépôt6 déc. 2002
Date de priorité6 déc. 2002
Autre référence de publicationCA2508558A1, DE60327464D1, EP1572016A2, EP1572016B1, US9615867, US20140094858, US20170209182, WO2004052217A2, WO2004052217A3
Numéro de publication10313171, 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
InventeursGeorge Picetti, Anthony Melkent, John Young
Cessionnaire d'originePicetti George D., Melkent Anthony J., Young John Stewart
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes: USPTO, Cession USPTO, Espacenet
Multi-rod bone attachment member
US 20040111088 A1
Résumé
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
Revendications(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.
Citations de brevets
Brevet cité Date de dépôt Date de publication Déposant Titre
US2002 *12 mars 1841 Tor and planter for plowing
US4719905 *1 déc. 198619 janv. 1988Acromed CorporationApparatus and method for maintaining vertebrae in a desired relationship
US4771767 *3 févr. 198620 sept. 1988Acromed CorporationApparatus and method for maintaining vertebrae in a desired relationship
US4805602 *3 nov. 198621 févr. 1989Danninger Medical TechnologyTranspedicular screw and rod system
US4946458 *28 févr. 19897 août 1990Harms JuergenPedicle screw
US5005562 *21 juin 19899 avr. 1991Societe De Fabrication De Material OrthopediqueImplant for spinal osteosynthesis device, in particular in traumatology
US5030220 *29 mars 19909 juil. 1991Advanced Spine Fixation Systems IncorporatedSpine fixation system
US5092867 *11 juil. 19893 mars 1992Harms JuergenCorrection and supporting apparatus, in particular for the spinal column
US5102412 *19 juin 19907 avr. 1992Chaim RogozinskiSystem for instrumentation of the spine in the treatment of spinal deformities
US5176680 *8 févr. 19915 janv. 1993Vignaud Jean LouisDevice for the adjustable fixing of spinal osteosynthesis rods
US5207676 *23 avr. 19914 mai 1993Jaquet Orthopedie S.A.External fixator with controllable damping
US5207678 *7 janv. 19924 mai 1993PruferPedicle screw and receiver member therefore
US5217497 *3 juil. 19918 juin 1993Mehdian Seyed M HApparatus for use in the treatment of spinal disorders
US5261909 *18 févr. 199216 nov. 1993Danek Medical, Inc.Variable angle screw for spinal implant system
US5261912 *15 août 199116 nov. 1993Synthes (U.S.A.)Implant for an osteosynthesis device, in particular for spinal column correction
US5360431 *26 avr. 19901 nov. 1994Cross Medical ProductsTranspedicular screw system and method of use
US5368593 *7 juil. 199229 nov. 1994Stark; John G.Devices and methods for attachment of spine fixation devices
US5443467 *18 févr. 199422 août 1995Biedermann Motech GmbhBone screw
US5466237 *19 nov. 199314 nov. 1995Cross Medical Products, Inc.Variable locking stabilizer anchor seat and screw
US5474555 *3 août 199412 déc. 1995Cross Medical ProductsSpinal implant system
US5476464 *18 févr. 199419 déc. 1995Howmedica GmbhDevice for setting a spine
US5501684 *25 juin 199226 mars 1996Synthes (U.S.A.)Osteosynthetic fixation device
US5520689 *8 mars 199528 mai 1996Synthes (U.S.A.)Osteosynthetic fastening device
US5520690 *13 avr. 199528 mai 1996Errico; Joseph P.Anterior spinal polyaxial locking screw plate assembly
US5531746 *22 mai 19952 juil. 1996Fastenetix, L.L.C.Posterior spinal polyaxial locking lateral mass screw plate assembly
US5549608 *13 juil. 199527 août 1996Fastenetix, L.L.C.Advanced polyaxial locking screw and coupling element device for use with rod fixation apparatus
US5554157 *14 juil. 199510 sept. 1996Fastenetix, L.L.C.Rod securing polyaxial locking screw and coupling element assembly
US5562663 *7 juin 19958 oct. 1996Danek Medical, Inc.Implant interconnection mechanism
US5569247 *27 mars 199529 oct. 1996Smith & Nephew Richards, Inc.Enhanced variable angle bone bolt
US5575792 *13 oct. 199519 nov. 1996Fastenetix, L.L.C.Extending hook and polyaxial coupling element device for use with top loading rod fixation devices
US5578033 *13 oct. 199526 nov. 1996Fastenetix, L.L.C.Advanced polyaxial locking hook and coupling element device for use with side loading rod fixation devices
US5584833 *25 avr. 199517 déc. 1996Soprane S.A.Device for retaining a connecting rod of a spine fixator on a pedicular screw
US5584834 *14 juil. 199517 déc. 1996Fastenetix, L.L.C.Polyaxial locking screw and coupling element assembly for use with side loading rod fixation apparatus
US5586984 *14 juil. 199524 déc. 1996Fastenetix, L.L.C.Polyaxial locking screw and coupling element assembly for use with rod fixation apparatus
US5601554 *3 nov. 199411 févr. 1997Advanced Spine Fixation Systems, Inc.Branch connector for spinal fixation systems
US5607426 *23 févr. 19964 mars 1997Fastenletix, L.L.C.Threaded polyaxial locking screw plate assembly
US5609593 *13 oct. 199511 mars 1997Fastenetix, LlcAdvanced polyaxial locking hook and coupling element device for use with top loading rod fixation devices
US5609594 *13 oct. 199511 mars 1997Fastenetix LlcExtending hook and polyaxial coupling element device for use with side loading road fixation devices
US5669911 *13 juin 199623 sept. 1997Fastenetix, L.L.C.Polyaxial pedicle screw
US5672176 *5 mars 199630 sept. 1997Biedermann; LutzAnchoring member
US5688273 *23 oct. 199518 nov. 1997Fastenetix, Llc.Spinal implant apparatus having a single central rod and plow hooks
US5702395 *10 nov. 199330 déc. 1997Sofamor S.N.C.Spine osteosynthesis instrumentation for an anterior approach
US5879350 *24 sept. 19969 mars 1999Sdgi Holdings, Inc.Multi-axial bone screw assembly
US5928232 *4 avr. 199627 juil. 1999Advanced Spine Fixation Systems, IncorporatedSpinal fixation system
US5993449 *30 nov. 199530 nov. 1999Synthes (Usa)Bone-fixing device
US6136002 *5 févr. 199924 oct. 2000Industrial Technology Research InstituteAnterior spinal fixation system
US6193721 *11 févr. 199827 févr. 2001Gary K. MichelsonMulti-lock anterior cervical plating system
US6206879 *22 oct. 199927 mars 2001Aesculap Ag & Co. KgOsteosynthetic holding system
US6302888 *19 mars 199916 oct. 2001Interpore Cross InternationalLocking dovetail and self-limiting set screw assembly for a spinal stabilization member
US6488681 *5 janv. 20013 déc. 2002Stryker Spine S.A.Pedicle screw assembly
US6602253 *12 févr. 20015 août 2003Marc RichelsophRod to rod connector
US6616669 *13 juil. 20019 sept. 2003Sdgi Holdings, Inc.Method for the correction of spinal deformities through vertebral body tethering without fusion
US6660004 *28 août 20019 déc. 2003Sdgi Holdings, Inc.Multi-axial bone screw assembly
US6702817 *3 janv. 20029 mars 2004Aesculap Ag & Co. KgLocking mechanism for a bone screw
US6706044 *17 avr. 200216 mars 2004Spineology, Inc.Stacked intermedular rods for spinal fixation
US6783527 *30 oct. 200131 août 2004Sdgi Holdings, Inc.Flexible spinal stabilization system and method
US7166108 *7 déc. 200123 janv. 2007Abbott SpineDevice for fixing a rod and a spherical symmetry screw head
US7186255 *12 août 20046 mars 2007Atlas Spine, Inc.Polyaxial screw
US7250052 *30 oct. 200331 juil. 2007Abbott Spine Inc.Spinal stabilization systems and methods
US7491218 *30 oct. 200317 févr. 2009Abbott Spine, Inc.Spinal stabilization systems and methods using minimally invasive surgical procedures
US20010010000 *12 mars 200126 juil. 2001Stanley GertzbeinSpinal rod transverse connectors
US20030045874 *31 août 20016 mars 2003Thomas James C.Transverse connector assembly for spine fixation system
US20040254577 *18 oct. 200216 déc. 2004Joel DelecrinProgressive approach osteosynthesis device and preassembly method
Référencé par
Brevet citant Date de dépôt Date de publication Déposant Titre
US737792319 mai 200427 mai 2008Alphatec Spine, Inc.Variable angle spinal screw assembly
US79429001 août 200717 mai 2011Spartek Medical, Inc.Shaped horizontal rod for dynamic stabilization and motion preservation spinal implantation system and method
US794290124 avr. 200617 mai 2011Warsaw Orthopedic, Inc.Connector apparatus
US794290216 nov. 200717 mai 2011Warsaw Orthopedic, Inc.Bone anchor and spinal alignment system
US796397830 mai 200821 juin 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
US798524330 mai 200826 juil. 2011Spartek Medical, Inc.Deflection rod system with mount for a dynamic stabilization and motion preservation spinal implantation system and method
US799337230 mai 20089 août 2011Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system with a shielded deflection rod system and method
US80028001 août 200723 août 2011Spartek Medical, Inc.Horizontal rod with a mounting platform for a dynamic stabilization and motion preservation spinal implantation system and method
US800280330 mai 200823 août 2011Spartek Medical, Inc.Deflection rod system for a spine implant including an inner rod and an outer shell and method
US800751824 sept. 200930 août 2011Spartek Medical, Inc.Load-sharing component having a deflectable post and method for dynamic stabilization of the spine
US80121751 août 20076 sept. 2011Spartek Medical, Inc.Multi-directional deflection profile for a dynamic stabilization and motion preservation spinal implantation system and method
US801218124 sept. 20096 sept. 2011Spartek Medical, Inc.Modular in-line deflection rod and bone anchor system and method for dynamic stabilization of the spine
US801686124 sept. 200913 sept. 2011Spartek Medical, Inc.Versatile polyaxial connector assembly and method for dynamic stabilization of the spine
US802139624 sept. 200920 sept. 2011Spartek Medical, Inc.Configurable dynamic spinal rod and method for dynamic stabilization of the spine
US804333711 juin 200725 oct. 2011Spartek Medical, Inc.Implant system and method to treat degenerative disorders of the spine
US804811330 mai 20081 nov. 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
US804811524 sept. 20091 nov. 2011Spartek Medical, Inc.Surgical tool and method for implantation of a dynamic bone anchor
US804812130 mai 20081 nov. 2011Spartek Medical, Inc.Spine implant with a defelction rod system anchored to a bone anchor and method
US804812230 mai 20081 nov. 2011Spartek Medical, Inc.Spine implant with a dual deflection rod system including a deflection limiting sheild associated with a bone screw and method
US804812330 mai 20081 nov. 2011Spartek Medical, Inc.Spine implant with a deflection rod system and connecting linkages and method
US804812524 sept. 20091 nov. 2011Spartek Medical, Inc.Versatile offset polyaxial connector and method for dynamic stabilization of the spine
US80481281 août 20071 nov. 2011Spartek Medical, Inc.Revision system and method for a dynamic stabilization and motion preservation spinal implantation system and method
US80527211 août 20078 nov. 2011Spartek Medical, Inc.Multi-dimensional horizontal rod for a dynamic stabilization and motion preservation spinal implantation system and method
US805272230 mai 20088 nov. 2011Spartek Medical, Inc.Dual deflection rod system for a dynamic stabilization and motion preservation spinal implantation system and method
US805751430 mai 200815 nov. 2011Spartek Medical, Inc.Deflection rod system dimensioned for deflection to a load characteristic for dynamic stabilization and motion preservation spinal implantation system and method
US805751524 sept. 200915 nov. 2011Spartek Medical, Inc.Load-sharing anchor having a deflectable post and centering spring and method for dynamic stabilization of the spine
US805751724 sept. 200915 nov. 2011Spartek Medical, Inc.Load-sharing component having a deflectable post and centering spring and method for dynamic stabilization of the spine
US80667471 août 200729 nov. 2011Spartek Medical, Inc.Implantation method for a dynamic stabilization and motion preservation spinal implantation system and method
US80707741 août 20076 déc. 2011Spartek Medical, Inc.Reinforced bone anchor for a dynamic stabilization and motion preservation spinal implantation system and method
US807077530 mai 20086 déc. 2011Spartek Medical, Inc.Deflection rod system for a dynamic stabilization and motion preservation spinal implantation system and method
US807077630 mai 20086 déc. 2011Spartek Medical, Inc.Deflection rod system for use with a vertebral fusion implant for dynamic stabilization and motion preservation spinal implantation system and method
US80707801 août 20076 déc. 2011Spartek Medical, Inc.Bone anchor with a yoke-shaped anchor head for a dynamic stabilization and motion preservation spinal implantation system and method
US80800391 août 200720 déc. 2011Spartek Medical, Inc.Anchor system for a spine implantation system that can move about three axes
US808377224 sept. 200927 déc. 2011Spartek Medical, Inc.Dynamic spinal rod assembly and method for dynamic stabilization of the spine
US808377524 sept. 200927 déc. 2011Spartek Medical, Inc.Load-sharing bone anchor having a natural center of rotation and method for dynamic stabilization of the spine
US809250124 sept. 200910 janv. 2012Spartek Medical, Inc.Dynamic spinal rod and method for dynamic stabilization of the spine
US8097022 *20 févr. 200717 janv. 2012Warsaw Orthopedic, Inc.Flexible coupling members for spinal stabilization members
US809702424 sept. 200917 janv. 2012Spartek Medical, Inc.Load-sharing bone anchor having a deflectable post and method for stabilization of the spine
US81053561 août 200731 janv. 2012Spartek Medical, Inc.Bone anchor with a curved mounting element for a dynamic stabilization and motion preservation spinal implantation system and method
US810535930 mai 200831 janv. 2012Spartek Medical, Inc.Deflection rod system for a dynamic stabilization and motion preservation spinal implantation system and method
US810997030 mai 20087 févr. 2012Spartek Medical, Inc.Deflection rod system with a deflection contouring shield for a spine implant and method
US811413030 mai 200814 févr. 2012Spartek Medical, Inc.Deflection rod system for spine implant with end connectors and method
US811413424 sept. 200914 févr. 2012Spartek Medical, Inc.Spinal prosthesis having a three bar linkage for motion preservation and dynamic stabilization of the spine
US81188421 août 200721 févr. 2012Spartek Medical, Inc.Multi-level dynamic stabilization and motion preservation spinal implantation system and method
US81424801 août 200727 mars 2012Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system with horizontal deflection rod and articulating vertical rods
US81475201 août 20073 avr. 2012Spartek Medical, Inc.Horizontally loaded dynamic stabilization and motion preservation spinal implantation system and method
US81629871 août 200724 avr. 2012Spartek Medical, Inc.Modular spine treatment kit for dynamic stabilization and motion preservation of the spine
US81728811 août 20078 mai 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
US817288211 juin 20078 mai 2012Spartek Medical, Inc.Implant system and method to treat degenerative disorders of the spine
US81778151 août 200715 mai 2012Spartek Medical, Inc.Super-elastic deflection rod for a dynamic stabilization and motion preservation spinal implantation system and method
US8177816 *5 sept. 200715 mai 2012Schwab Frank JVertebral anchor
US8182513 *24 nov. 200622 mai 2012Lanx, S.R.L.Modular vertebral stabilizer
US81825151 août 200722 mai 2012Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system and method
US81825161 août 200722 mai 2012Spartek Medical, Inc.Rod capture mechanism for dynamic stabilization and motion preservation spinal implantation system and method
US8192468 *21 déc. 20065 juin 2012Biedermann Technologies Gmbh & Co. KgDynamic stabilization device for bones or vertebrae
US81924691 août 20075 juin 2012Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system and method with a deflection rod
US82111501 août 20073 juil. 2012Spartek Medical, Inc.Dynamic stabilization and motion preservation spinal implantation system and method
US821115524 sept. 20093 juil. 2012Spartek Medical, Inc.Load-sharing bone anchor having a durable compliant member and method for dynamic stabilization of the spine
US821115625 janv. 20083 juil. 2012Andersen Bruce JOsteoporatic screw and expansion sleeve
US82162812 déc. 200910 juil. 2012Spartek Medical, Inc.Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod
US82573972 déc. 20104 sept. 2012Spartek Medical, Inc.Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod
US826797924 sept. 200918 sept. 2012Spartek Medical, Inc.Load-sharing bone anchor having a deflectable post and axial spring and method for dynamic stabilization of the spine
US829826523 mai 200830 oct. 2012Thomas PurcellVariable angle spinal screw assembly
US829826730 mai 200830 oct. 2012Spartek Medical, Inc.Spine implant with a deflection rod system including a deflection limiting shield associated with a bone screw and method
US8313515 *15 juin 200720 nov. 2012Rachiotek, LlcMulti-level spinal stabilization system
US831783610 nov. 200927 nov. 2012Spartek Medical, Inc.Bone anchor for receiving a rod for stabilization and motion preservation spinal implantation system and method
US833379224 sept. 200918 déc. 2012Spartek Medical, Inc.Load-sharing bone anchor having a deflectable post and method for dynamic stabilization of the spine
US833753624 sept. 200925 déc. 2012Spartek Medical, Inc.Load-sharing bone anchor having a deflectable post with a compliant ring and method for stabilization of the spine
US836112316 oct. 200929 janv. 2013Depuy Spine, Inc.Bone anchor assemblies and methods of manufacturing and use thereof
US836112927 avr. 200729 janv. 2013Depuy Spine, Inc.Large diameter bone anchor assembly
US837212229 avr. 201112 févr. 2013Spartek Medical, Inc.Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod
US839412727 juin 201212 mars 2013Spartek Medical, Inc.Low profile spinal prosthesis incorporating a bone anchor having a deflectable post and a compound spinal rod
US84309167 févr. 201230 avr. 2013Spartek Medical, Inc.Spinal rod connectors, methods of use, and spinal prosthesis incorporating spinal rod connectors
US851808527 janv. 201127 août 2013Spartek Medical, Inc.Adaptive spinal rod and methods for stabilization of the spine
US8535352 *28 mars 200817 sept. 2013Exactech, Inc.Multi-level minimally invasive spinal stabilization system
US856845110 nov. 200929 oct. 2013Spartek Medical, Inc.Bone anchor for receiving a rod for stabilization and motion preservation spinal implantation system and method
US86367752 août 201228 janv. 2014Thomas PurcellVariable angle spinal screw assembly
US8657857 *5 nov. 200925 févr. 2014Dalmatic Lystrup A/SBone fixation device
US875841125 oct. 201224 juin 2014Nuvasive, Inc.Implants and methods for treating spinal disorders
US879533630 sept. 20095 août 2014Biedermann Technologies Gmbh & Co. KgBone anchoring device and stabilization device for bone parts or vertebrae comprising such a bone anchoring device
US897990222 mai 201217 mars 2015Biedermann Technologies Gmbh & Co. KgDynamic stabilization device for bones or vertebrae
US90501412 févr. 20099 juin 2015Texas Scottish Rite Hospital For ChildrenPedicle screw
US9055980 *28 juil. 201016 juin 2015Biedermann Technologies Gmbh & Co. KgBone anchoring device
US910140331 août 200911 août 2015Biedermann Technologies Gmbh & Co. KgBone anchoring element and stabilization device for bones, in particular for the spinal column
US9119676 *21 déc. 20121 sept. 2015DePuy Synthes Products, Inc.Bone screw fixation
US916178214 janv. 201320 oct. 2015DePuy Synthes Products, Inc.Bone anchor assemblies and methods of manufacturing and use thereof
US924173911 sept. 200926 janv. 2016DePuy Synthes Products, Inc.Spinal stabilizing and guiding fixation system
US928300220 juin 201315 mars 2016Zimmer SpineOrthopaedic device and methods for its pre-assembly and assembly
US9345517 *8 nov. 201224 mai 2016Globus Medical, Inc.Pedicle screw having a removable rod coupling
US9408641 *2 févr. 20099 août 2016Globus Medical, Inc.Spinal rod link reducer
US943967915 avr. 201413 sept. 2016Dalmatic Lystrup A/SBone fixation system
US951086217 juin 20106 déc. 2016DePuy Synthes Products, Inc.Revision connector for spinal constructs
US9526526 *29 avr. 201527 déc. 2016Globus Medical, Inc.Pedicle screw
US9526527 *5 févr. 201627 déc. 2016Globus Medical, Inc.Pedicle screw having a removable rod coupling
US9579126 *1 mars 201228 févr. 2017Globus Medical, Inc.Spinal rod link reducer
US9597118 *6 janv. 201021 mars 2017Dfine, Inc.Bone anchor apparatus and method
US9603635 *22 avr. 201528 mars 2017Globus Medical, IncOrthopedic fixation devices and methods of installation thereof
US961011010 avr. 20154 avr. 2017Dfine, Inc.Bone treatment systems and methods
US9649133 *11 nov. 201516 mai 2017Intrepid OrthopedicsSupplemental fixation screw
US20040236330 *19 mai 200425 nov. 2004Thomas PurcellVariable angle spinal screw assembly
US20070191844 *31 janv. 200616 août 2007Sdgi Holdings, Inc.In-series, dual locking mechanism device
US20070225708 *21 déc. 200627 sept. 2007Lutz BiedermannDynamic stabilization device for bones or vertebrae
US20070270816 *24 avr. 200622 nov. 2007Sdgi Holdings, Inc.Connector apparatus
US20070270817 *24 avr. 200622 nov. 2007Sdgi Holdings, Inc.Connector apparatus
US20070270818 *24 avr. 200622 nov. 2007Sdgi Holdings, Inc.Connector apparatus
US20080015580 *27 avr. 200717 janv. 2008Nam ChaoLarge diameter bone anchor assembly
US20080058805 *28 août 20066 mars 2008Microdexterity Systems, Inc.Spinal fusion implant
US20080058818 *5 sept. 20076 mars 2008Schwab Frank JVertebral Anchor
US20080086130 *6 oct. 200610 avr. 2008Depuy Spine, Inc.Torsionally stable fixation
US20080183215 *28 mars 200831 juil. 2008Moti AltaracMulti-level minimally invasive spinal stabilization system
US20080234743 *20 févr. 200725 sept. 2008Warsaw Orthopedic, Inc.Flexible coupling members for spinal stabilization members
US20080262546 *24 nov. 200623 oct. 2008Giuseppe CalvosaModular Vertebral Stabilizer
US20080269810 *11 avr. 200830 oct. 2008Texas Scottish Rite Hospital For ChildrenOrthopedic Fastener for Stabilization and Fixation
US20080312692 *15 juin 200718 déc. 2008Terrence BrennanMulti-level spinal stabilization system
US20090131982 *16 nov. 200721 mai 2009Frank Johann SchwabBone anchor and spinal alignment system
US20090192552 *25 janv. 200830 juil. 2009Andersen Bruce JOsteoporatic screw and expansion sleeve
US20090198273 *2 févr. 20096 août 2009Texas Scottish Rite Hospital For ChildrenPedicle Screw
US20090198279 *2 févr. 20096 août 2009Texas Scottish Rite Hospital For ChildrenSpinal Rod Link Reducer
US20100087865 *30 sept. 20098 avr. 2010Lutz BiedermannBone anchoring device and stabilization device for bone parts or vertebrae comprising such a bone anchoring device
US20100094348 *31 août 200915 avr. 2010Lutz BiedermannBone anchoring element and stabilization device for bones, in particular for the spinal column
US20100174320 *6 janv. 20108 juil. 2010Dfine, Inc.Bone anchor apparatus and method
US20100234892 *15 oct. 200916 sept. 2010Keyvan MazdaSpinal interconnecting device and a stabilizing system using said device
US20100324599 *17 juin 201023 déc. 2010Albert MontelloRevision connector for spinal constructs
US20110034957 *28 juil. 201010 févr. 2011Markku BiedermannBone anchoring device
US20110106166 *15 avr. 20105 mai 2011Tom KeyerRevision connector for spinal constructs
US20110245883 *5 nov. 20096 oct. 2011Vagn Erik DallBone Fixation Device
US20120221057 *1 mars 201230 août 2012Texas Scottish Rite Hospital For ChildrenSpinal Rod Link Reducer
US20130090691 *8 nov. 201211 avr. 2013Texas Scottish Rite Hospital For ChildrenPedicle screw having a removable rod coupling
US20130123854 *15 nov. 201216 mai 2013Dimitriy G. KondrashovSystem and method for spinal stabilization through mutli-head spinal screws
US20130338715 *21 déc. 201219 déc. 2013Depuy Spine, Inc.Bone screw fixation
US20140018858 *9 juil. 201316 janv. 2014Bruno LaengDevice, Kit and Method for Correction of Spinal Deformity
US20150223844 *22 avr. 201513 août 2015Globus Medical, Inc.Orthopedic fixation devices and methods of installation thereof
US20150257791 *29 avr. 201517 sept. 2015Texas Scottish Rite Hospital For ChildrenPedicle Screw
US20150359568 *13 juin 201417 déc. 2015Warsaw Orthopedic, Inc.Bone fastener and methods of use
US20160008035 *13 juil. 201514 janv. 2016Biedermann Technologies Gmbh & Co. KgBone anchoring element and stabilization device for bones, in particular for the spinal column
US20160128732 *11 nov. 201512 mai 2016Intrepid OrthopedicsSupplemental Fixation Screw
US20160220279 *5 févr. 20164 août 2016Globus Medical, Inc.Pedicle screw having a removable rod coupling
CN102368967A *15 avr. 20107 mars 2012斯恩蒂斯有限公司Revision connector for spinal constructs
CN102573679A *19 juil. 201011 juil. 2012思邦科技脊柱智慧集团股份公司Spine fixation system
EP2160989A1 *5 sept. 200810 mars 2010BIEDERMANN MOTECH GmbHBone anchoring element and stabilization device for bones in particular for the spinal column
EP2174608A1 *8 oct. 200814 avr. 2010BIEDERMANN MOTECH GmbHBone anchoring device and stabilization device for bone parts or vertebrae
EP2484300A1 *5 sept. 20088 août 2012Biedermann Technologies GmbH & Co. KGBone anchoring element and stabilization device for bones, in particular for the spinal column
EP3181075A1 *16 déc. 201621 juin 2017Vijay GoelDouble-headed pedicle screw
WO2007060534A2 *24 nov. 200631 mai 2007Giuseppe CalvosaModular vertebral stabilizer
WO2007060534A3 *24 nov. 200629 nov. 2007Giuseppe CalvosaModular vertebral stabilizer
WO2009064831A1 *13 nov. 200822 mai 2009Warsaw Orthopedic, Inc.Bone anchor and spinal alignment system
WO2010030906A1 *11 sept. 200918 mars 2010Synthes Usa, LlcSpinal stabilizing and guiding fixation system
WO2011012236A1 *19 juil. 20103 févr. 2011Copf Franz JunSpine fixation system
WO2014011580A1 *9 juil. 201316 janv. 2014DePuy Synthes Products, LLCDevice, kit and method for correction of spinal deformity
Classifications
Classification aux États-Unis606/265, 606/269, 606/279, 606/270, 606/276
Classification internationaleA61B17/70
Classification coopérativeA61B17/7034, A61B17/8605, A61B17/7037, A61B17/7044, A61B17/7032, A61B17/7001
Classification européenneA61B17/70B, A61B17/70B8, A61B17/70B2, A61B17/70B5B, A61B17/70B2L
Événements juridiques
DateCodeÉvénementDescription
27 févr. 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
20 févr. 2008ASAssignment
Owner name: WARSAW ORTHOPEDIC, INC., INDIANA
Free format text: MERGER;ASSIGNOR:SDGI HOLDINGS, INC.;REEL/FRAME:020534/0610
Effective date: 20060428