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 numberUS20050171542 A1
Publication typeApplication
Application numberUS 11/023,114
Publication dateAug 4, 2005
Filing dateDec 27, 2004
Priority dateMar 27, 2001
Also published asDE10115014A1, DE50212107D1, EP1372502A1, EP1372502B1, US6835196, US20020143341, WO2002076314A1
Publication number023114, 11023114, US 2005/0171542 A1, US 2005/171542 A1, US 20050171542 A1, US 20050171542A1, US 2005171542 A1, US 2005171542A1, US-A1-20050171542, US-A1-2005171542, US2005/0171542A1, US2005/171542A1, US20050171542 A1, US20050171542A1, US2005171542 A1, US2005171542A1
InventorsLutz Biedermann, Jurgen Harms
Original AssigneeLutz Biedermann, Jurgen Harms
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Anchoring element
US 20050171542 A1
Abstract
An anchoring element with a screw (12) comprising a threaded section (13) and a head (15) designed as a spherical segment-shaped section, and with a receiving portion (1) for connecting the screw (12) to a rod (19), is provided. The receiving portion (1) comprises a first end (2) and a second end (3) opposite the latter and a longitudinal axis (4) passing through the two ends (2, 3). The receiving portion further comprises a bore (5) coaxial with the longitudinal axis (4), a first region adjoining the first end (2) with an essentially U-shaped cross-section (18) with two free arms (8, 9) comprising a thread for receiving the rod (19) to be inserted, a region adjoining the other end (3) for receiving the head (15), and an element which exerts pressure on the rod (19) or on the head (15). In order that the screws can be used in situ for very different lengths, the threaded section (13) and the head (15) are designed as separate parts.
Images(5)
Previous page
Next page
Claims(11)
1. Anchoring element with a screw (12) comprising a threaded section (13) and a head (15) designed as a spherical segment-shaped section, and with a receiving portion (1) for connecting the screw (12) to a rod (19), wherein the receiving portion (1) comprises a first end (2) and a second end (3) opposite the latter, a longitudinal axis (4) passing through the two ends (2, 3), a bore (5) coaxial with the longitudinal axis (4), a first region adjoining the first end (2) with an essentially U-shaped cross-section (7) with two free arms (8, 9) comprising a thread for receiving the rod (19) to be inserted, a region adjoining the other end (3) for receiving the head (15), and an element (22, 17) which exerts pressure on the rod (19) or on the head (15), characterised in that the threaded section (13) and the head (15) are designed as separate parts.
2. Anchoring element according to claim 1, characterised in that the threaded section (13) comprises a shank (14) at the head end.
3. Anchoring element according to claim 1 or 2, characterised in that the head (15) comprises a spring-yielding edge on its side facing towards the threaded section (13).
4. Anchoring element according to any of claims 1 to 3, characterised in that the edge (34) facing towards the threaded action comprises one or more apertures or recesses (28, 29, 33) which are directed parallel to the axis of symmetry (4) and distributed circumferentially.
5. Anchoring element according to claim 4, characterised in that an aperture (33) extends over the whole wall length, seen in a direction parallel to the axis of symmetry (4).
6. Anchoring element according to any of claims 1 to 5, characterised in that the head (15) comprises a bore (27) coaxial with the axis of symmetry.
7. Anchoring element according to claim 6, characterised in that the bore (27) is cylindrical.
8. Anchoring element according to any of claims 2 to 7, characterised in that the shank (14) comprises a rough surface.
9. Anchoring element according to any of claims 2 to 8, characterised in that the shank (14) is polygonal.
10. Anchoring element according to any of claims 1 to 6, characterised in that the head (15) comprises an internal thread in the bore and the shank (35) comprises an external thread mating therewith.
11. Anchoring element according to any of claims 1 to 6, characterised in that the head (15) is corrugated in the circumferential direction in the bore and the shank (37) comprises a corresponding corrugation on its outer side.
Description
  • [0001]
    The invention concerns an anchoring element with a screw comprising a threaded section and a head designed as a spherical segment-shaped section, and with a receiving portion for connecting the screw to a rod, according to the introductory part of patent claim 1. An anchoring element of this kind is used in particular in vertebral column surgery, but also in accident surgery on other bones.
  • [0002]
    Such an anchoring element is known from DE 43 07 576 C1, for example. With known anchoring elements and screws of this kind, the threaded section of the screw and its head are constructed in one piece. As the surgeon needs very different lengths of screws, he must always have different sets of such screws available. This makes a considerable stockpile necessary, resulting in considerable costs.
  • [0003]
    It is the object of the invention to eliminate this drawback.
  • [0004]
    This object is achieved by the anchoring element characterised in patent claim 1. As a result it is possible for the surgeon during application to shorten the threaded section to a desired length before or after implanting, and then connect it to the head and the receiving portion. In this way the maintenance of stocks is substantially reduced, and at the same time the possibilities for the surgeon to make finer adjustments are increased, as the screws can be shortened to any length.
  • [0005]
    Developments of the invention are characterised in the subsidiary claims.
  • [0006]
    Further characteristics and suitabilities of the invention are apparent from the description of practical examples with the aid or the figures.
  • [0007]
    The figures show:
  • [0008]
    FIG. 1 a side view of a first embodiment in section;
  • [0009]
    FIG. 2 the embodiment shown in FIG. 1 in an exploded view;
  • [0010]
    FIG. 3 a corresponding exploded view of a second embodiment;
  • [0011]
    FIG. 4 a side view of the first bone screw used in both embodiments;
  • [0012]
    FIG. 5 a top view of the bone screw in FIG. 4;
  • [0013]
    FIG. 6 a side view of a second embodiment of the bone screw used in the first two practical examples;
  • [0014]
    FIG. 7 a top view of the bone screw-shown in FIG. 6;
  • [0015]
    FIG. 8 a side view of a third embodiment of a bone screw shown in the first two practical examples;
  • [0016]
    FIG. 9 a side view of a further embodiment in section;
  • [0017]
    FIG. 10 a side view of a further embodiment in section; and
  • [0018]
    FIG. 11 an enlarged view of the detail X of FIG. 10.
  • [0019]
    In the first embodiment shown in FIGS. 1 and 2, the anchoring element comprises a receiving portion 1 of cylindrical construction with a first end 2 and an opposed second end 3. The two ends extend perpendicularly to an axis of symmetry or longitudinal axis 4. Coaxially with the longitudinal axis 4 is provided a first coaxial bore 5 which extends from the first end 2 and which extends as far as a predetermined distance from the second end 3. At the second end 3 is provided a second bore whose diameter is smaller than the diameter of the first bore. In the practical example shown, the second bore is designed as an opening whose edge is shaped as a hollow spherical segment-shaped section whose centre is directed towards the first end 2.
  • [0020]
    The receiving portion 1 comprises, starting from the first end 2, a U-shaped recess 7 extending perpendicularly to the longitudinal axis 3, with two free arms 8, 9 ending towards the first end 2. Adjoining the first end 2, the arms comprise an internal thread 10. The bottom of the U-shaped recess extends as far as a predetermined distance from the second end 3. Adjoining the first end 2, the arms 8, 9 comprise on the outside a section 11 whose outside diameter is smaller than the outside diameter of the adjoining section of the receiving portion.
  • [0021]
    The screw 12 cooperating with the receiving portion 1 comprises a threaded section 13 designed as a bone screw and a spherical segment-shaped head 15 which is connected thereto in the assembled view shown in FIG. 1. The head has a radius which is such that, when the head 15 is received in the second bore 6 as shown in FIG. 1, the head mates with a hollow spherical segment-shaped wall section formed there, wherein the hollow spherical segment-shaped section is designed in such a way that the centre 16 of the sphere is offset towards the first end 2 to such an extent that the section forms an abutment and the sphere or the head 15 is held in the hollow spherical segment-shaped section of the second bore 6.
  • [0022]
    There is further provided a pressure element 17 which is of cylindrical construction and has an outside diameter which is so large that the pressure element can be introduced into the first bore 5 and moved to and fro in the axial direction in the latter. On its lower side facing towards the second end 3 the pressure element 17 comprises a hollow spherical segment-shaped section which is constructed symmetrically to the longitudinal axis 4 and whose radius corresponds to the radius of the head 5. The pressure element comprises a U-shaped recess 18 which extends transversely to the longitudinal axis 4 and whose free arms extend towards the first end 2. The lateral diameter of this U-shaped recess is selected so that a rod 19 to be received can be inserted in the recess and guided laterally in the latter. The depth of the hollow spherical segment-shaped recess is selected so that it ends at a distance from the second end 3 which is greater than the distance from the centre 16 corresponding to the radius of the head 15, looking towards the first end 2. At the bottom of the U-shaped recess 18 is an adjoining coaxial bore 20 whose diameter is smaller than the diameter of the rod 19 to be received.
  • [0023]
    As can be seen from FIG. 1, the U-shaped recess 18 comprises, at its end directed towards the first end 2, a section 21 whose inside width is greater than the diameter of the U-shaped recess 18.
  • [0024]
    On the side facing towards the first end 2, the pressure element 17 is adjoined by a nut 22 which comprises an external thread 23 mating with the internal thread 10 and in addition an internal thread 24. The inside dimensions of the nut 22 are selected so that the inside width is smaller than the diameter of the section 21 and larger than the diameter of the rod 19 and hence of the U-shaped recess 10. Further, an internal nut 25 with an external thread mating with the internal thread 24 is provided. Finally, there is provided a bush 26 which encompasses the free end adjoining the first end 2 and which in the assembled state sits on the annular section 11, as shown in FIG. 1.
  • [0025]
    As can best be seen from FIG. 2, the nut 22 comprises a slot and the internal nut 25 comprises a hexagon opening for respective separate application of screwdrivers.
  • [0026]
    As can best be seen from FIG. 2, the head 15 is designed as a sphere flattened at its end which is to face towards the first end 2, and comprises a bore 27 coaxial with the longitudinal axis 4. The diameter of the bore 27 is equal to the outside diameter of the shank 14 and designed in such a way that the shank can be inserted in the bore with frictional locking. As can be seen from FIG. 2, the hollow spherical segment-shaped element shaped in this way is provided, on its side opposite the flattened end, with sections 28, 29 which are spaced apart from each other in the circumferential direction and extend parallel to the longitudinal axis 4 and extend as far as the end opposite the flattened side. As a result, the edge 30 facing away from the first end 2 is designed to be capable of spring yielding outwards for introduction of the shank 14.
  • [0027]
    In operation, first the screw 12 is screwed into the bone or vertebra. For this purpose the shank 14 has known engagement possibilities such as a hexagon socket. Then the surgeon shortens the shank 14 to the desired length and first places the receiving portion with the second bore on the shank 14 and then guides the head from the first end 2 onto the shank 14, so that the shank 14 is introduced into the bore 27 from the spring-yielding edge 30 and the head surrounds the shank in the manner shown in FIG. 1. The head 15 and the shank 14 are connected to each other with frictional locking. Next the pressure element 17 is inserted and, by screwing in the nut 22, pressed onto the head 13 in such a way that the latter undergoes desired rotational stabilisation. The bush 26 is fitted and then by means of the internal nut 25 the rod 19 is fixed. The rod 19 exerts an additional pressure on the head 15 via the pressure element 17.
  • [0028]
    Due to the pressure on the head 15 exerted as seen from the first end 2, the slotted head 15 is on the one hand connected or clamped to the shank 14, preventing movement, and at the same time the head is locked in its rotational position.
  • [0029]
    The second embodiment shown in FIG. 3 differs from the embodiment described above in a modified head 31. The latter comprises, as in the first embodiment, notches 28 which are offset from each other in the circumferential direction and which end free at the edge 34 facing away from the first end and are at a distance from the edge 32 facing towards the first end 2. However, a notch 33 which extends fully from the edge 32 to the opposite edge 34 is provided, with the result that the spherical segment formed in this way can be compressed by an amount defined by the width of the notch 33. The width of the slot 33 formed in this way is selected so that the head 31 first of all can be compressed to such an extent that it can be pressed in the direction shown in FIG. 3 from the second end 2 into the first bore 5 and that then the shank 14 can be inserted in the head in the same way as described above and in the same way is held in the clamped position.
  • [0030]
    The shank 14 of the screw preferably has the cylindrical shape shown in FIGS. 4 and 5 or a polygonal shape shown in FIGS. 6 and 7. In the latter the cross-section is octagonal. A further preferred embodiment is shown in FIG. 8. The shank is cylindrical here and comprises a rough surface which facilitates engagement between sphere 15 and shank.
  • [0031]
    The further embodiment shown in FIG. 9 corresponds to the preceding practical examples in all characteristics concerning the receiving portion 1, the pressure element 17, the rod 19 and the screws 22 and 25. The only difference lies in that the head 15 is designed as a spherical segment which in its external dimensions corresponds to the two preceding spherical segments, but has no notches 28 or 33 Instead, the spherical segment has an internal thread on the inside of its bore 27. Instead of the shank 14, there is provided a shank 35 with a thread which is designed to mate with the internal thread of the head. The bore is designed as a blind bore which ends at the end facing towards the free end 2 or comprises a stop there, so that the screw can be screwed only so far into the position shown in which it does not protrude from the spherical segment on its flattened side. As shown in FIG. 9, the internal thread of the head 15 and the corresponding external thread of the shank 35 are formed in the direction preferably opposite the direction of the thread of the threaded section 13 of the bone screw.
  • [0032]
    Operation takes place in the same manner as in the practical example described first, wherein after shortening of the shank 35 the head 15 is introduced into the bore 5 from the first end 2 of the receiving portion 1 and screwed onto the shank 35 introduced from the second end 3.
  • [0033]
    The further embodiment shown in FIGS. 10 and 11 corresponds to the preceding practical examples in all characteristics concerning the receiving portion 1, the pressure element 17, the rod 19 and the screws 22 and 25. Instead of the shank 35 and the head 15 of the embodiment according to FIG. 9, which comprises the cooperating threads, in this embodiment the shank 37 is designed as a corrugated rod in a section adjoining the end opposite the bone threaded section. The outer surface of the shank comprises valleys 38 running in the circumferential direction and ridges 39 in between them. The valleys 38 have, seen in the circumferential direction, a circle segment-shaped cross-section and their diameter halfway up or down is much larger than the corresponding diameter of the crest 39, so that the crests 39 are pointed in relation to the bottom of the valleys 38. The head 15 is designed as a spherical segment which in its external dimensions corresponds to the spherical segments mentioned above, but which has no notches 28 or 33. On the inside of its bore 27, the spherical segment of the head 15 comprises corrugations running in the circumferential direction with valleys 40 and ridges 41 which correspond to the ridges 39 and valleys 38 of the shank 37 respectively. Between the valleys 38 and the ridges 39 of the shank on the one hand and the corresponding ridges 40 and valleys 41 on the other hand is a small gap, so that the shank can be introduced into the spherical segment.
  • [0034]
    Operation takes place in a similar manner to the practical example according to FIG. 9. Shortening of the corrugated shank 37 is however easier in this embodiment than shortening of the shank 35 with the thread according to FIG. 9, as the valleys 38 allow easy cutting off, whereas with the shank 35 with the thread according to FIG. 9 care must be taken that the thread is not destroyed. After shortening of the shank 37, the head 15 is introduced into the bore 5 from the first end 2 of the receiving portion 1 and pressed onto the shank 37. In the process the corrugations of the shank 37 and the corresponding ones of the bore 27 of the head 15 cooperate, so that the shank is held.
  • [0035]
    In the practical examples described above, the head 15 is in each case held by an edge designed in one piece with the receiving portion 1. Such an abutment can also be formed in another way: for example, it is possible to drill the first bore 5 completely through the receiving portion 1 and then, adjoining the second end, to mount in it a holding element which receives the head 15.
  • [0036]
    In the practical examples described above, the receiving portion always comprises the nut 22 and an internal nut 25 as well as a bush 26. This fixing can also be designed differently in a known manner. In particular, if occasion arises only an internal nut can be provided.
  • [0037]
    In the practical example described above with reference to FIG. 9, the head 15 has no notches 28, 33. In a further embodiment, head 15 and shank 35 have, as in the view shown in FIG. 9, threads mating with each other. The head 15 however comprises in addition the notch 33 extending over the whole length so that, as in the embodiment shown in FIG. 3, the head without the shank screwed in can be inserted in the receiving portion from the edge 3 by compression and then fitted on the shank 35 which can also be introduced from the end 3, by screwing in, and connected to the shank 35. As a result of the slot, when the pressure elements are applied or when the pressure is exerted on the head 15, at the same time the head and the shank 35 are compressed more firmly than without such a slot.
  • [0038]
    In a further embodiment, notches 28 can be provided additionally in the manner shown in FIG. 3, in order thus to cause even greater contact pressure with the threaded shank 35.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US5501684 *Jun 25, 1992Mar 26, 1996Synthes (U.S.A.)Osteosynthetic fixation device
US5735850 *Jan 30, 1996Apr 7, 1998Sulzer Medizinaltechnik AgFastening system for pedicel screws
US6146383 *Feb 1, 1999Nov 14, 2000Sulzer Orthopadie AgPivotal securing system at a bone screw
US20070055240 *Jul 7, 2006Mar 8, 2007Wilfried MatthisBone anchoring device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7635379Dec 31, 2004Dec 22, 2009Applied Spine Technologies, Inc.Pedicle screw assembly with bearing surfaces
US7651502Sep 24, 2004Jan 26, 2010Jackson Roger PSpinal fixation tool set and method for rod reduction and fastener insertion
US7922725Apr 19, 2007Apr 12, 2011Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization system
US7942907Aug 25, 2010May 17, 2011Richelsoph Marc EPolyaxial screw assembly
US8016862 *Sep 27, 2007Sep 13, 2011Innovasis, Inc.Spinal stabilizing system
US8066739Nov 29, 2011Jackson Roger PTool system for dynamic spinal implants
US8083776 *Jun 28, 2006Dec 27, 2011Traiber, S.A.Vertebral fixation device and tool for assembling the device
US8100915Jan 24, 2012Jackson Roger POrthopedic implant rod reduction tool set and method
US8100946Nov 21, 2006Jan 24, 2012Synthes Usa, LlcPolyaxial bone anchors with increased angulation
US8133262Apr 27, 2007Mar 13, 2012Depuy Spine, Inc.Large diameter bone anchor assembly
US8152810Nov 23, 2004Apr 10, 2012Jackson Roger PSpinal fixation tool set and method
US8162948Apr 24, 2012Jackson Roger POrthopedic implant rod reduction tool set and method
US8197517May 8, 2008Jun 12, 2012Theken Spine, LlcFrictional polyaxial screw assembly
US8221469 *Dec 24, 2008Jul 17, 2012Spinelab AgPedicle screw with a closure device for securing a rod for stabilization of the vertebral column
US8267980Sep 18, 2012Felix Brent ASpinal stabilizing system
US8273089Sep 25, 2012Jackson Roger PSpinal fixation tool set and method
US8292892May 13, 2009Oct 23, 2012Jackson Roger POrthopedic implant rod reduction tool set and method
US8357184Jan 22, 2013Nuvasive, Inc.Method and apparatus for performing spinal surgery
US8361123Jan 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
US8377067Feb 19, 2013Roger P. JacksonOrthopedic implant rod reduction tool set and method
US8394133Jul 23, 2010Mar 12, 2013Roger P. JacksonDynamic fixation assemblies with inner core and outer coil-like member
US8435266May 7, 2013Marc E. RichelsophPolyaxial screw assembly
US8435269Aug 5, 2011May 7, 2013Nuvasive, Inc.Method and apparatus for performing spinal fusion surgery
US8535320Aug 5, 2011Sep 17, 2013Nuvasive, Inc.Method and apparatus for performing spinal surgery
US8556938Oct 5, 2010Oct 15, 2013Roger P. JacksonPolyaxial bone anchor with non-pivotable retainer and pop-on shank, some with friction fit
US8591515Aug 26, 2009Nov 26, 2013Roger P. JacksonSpinal fixation tool set and method
US8632572Mar 15, 2011Jan 21, 2014Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization system
US8636655Jan 19, 2011Jan 28, 2014Ronald ChildsTissue retraction system and related methods
US8679162Dec 19, 2011Mar 25, 2014DePuy Synthes Products, LLCPolyaxial bone anchors with increased angulation
US8814913Sep 3, 2013Aug 26, 2014Roger P JacksonHelical guide and advancement flange with break-off extensions
US8845649May 13, 2009Sep 30, 2014Roger P. JacksonSpinal fixation tool set and method for rod reduction and fastener insertion
US8894657Nov 28, 2011Nov 25, 2014Roger P. JacksonTool system for dynamic spinal implants
US9011450Aug 8, 2012Apr 21, 2015DePuy Synthes Products, LLCSurgical instrument
US9050139Mar 15, 2013Jun 9, 2015Roger P. JacksonOrthopedic implant rod reduction tool set and method
US9050146Nov 10, 2010Jun 9, 2015Nuvasive, Inc.Method and apparatus for performing spinal surgery
US9055978Oct 2, 2012Jun 16, 2015Roger P. JacksonOrthopedic implant rod reduction tool set and method
US9084634Jul 11, 2011Jul 21, 2015Theken Spine, LlcUniplanar screw
US9161782Jan 14, 2013Oct 20, 2015DePuy Synthes Products, Inc.Bone anchor assemblies and methods of manufacturing and use thereof
US9211150Sep 23, 2010Dec 15, 2015Roger P. JacksonSpinal fixation tool set and method
US9216039Nov 19, 2010Dec 22, 2015Roger P. JacksonDynamic spinal stabilization assemblies, tool set and method
US9277940Feb 5, 2008Mar 8, 2016Zimmer Spine, Inc.System and method for insertion of flexible spinal stabilization element
US9307972May 10, 2012Apr 12, 2016Nuvasive, Inc.Method and apparatus for performing spinal fusion surgery
US9320546 *Sep 29, 2009Apr 26, 2016DePuy Synthes Products, Inc.Polyaxial bottom-loading screw and rod assembly
US9326796Dec 30, 2013May 3, 2016DePuy Synthes Products, Inc.Uni-planer bone fixation assembly
US9414863Jul 31, 2012Aug 16, 2016Roger P. JacksonPolyaxial bone screw with spherical capture, compression insert and alignment and retention structures
US9421041Oct 2, 2009Aug 23, 2016Marc E. RichelsophPolyaxial screw assembly
US9433440Apr 8, 2010Sep 6, 2016Intelligent Implant Systems LlcPolyaxial screw assembly
US9439681Jan 24, 2014Sep 13, 2016DePuy Synthes Products, Inc.Polyaxial bone fixation element
US20050182409 *Dec 31, 2004Aug 18, 2005Ronald CallahanSystems and methods accommodating relative motion in spine stabilization
US20060025771 *Oct 7, 2005Feb 2, 2006Jackson Roger PHelical reverse angle guide and advancement structure with break-off extensions
US20060074418 *Sep 24, 2004Apr 6, 2006Jackson Roger PSpinal fixation tool set and method for rod reduction and fastener insertion
US20060083603 *Nov 22, 2005Apr 20, 2006Jackson Roger PReverse angled threadform with anti-splay clearance
US20060241602 *Jun 14, 2006Oct 26, 2006Jackson Roger PHooked transverse connector for spinal implant system
US20070118123 *Nov 21, 2006May 24, 2007Strausbaugh William LPolyaxial bone anchors with increased angulation
US20070288004 *Jun 28, 2006Dec 13, 2007Luis Marquez AlvarezVertebral fixation device and tool for assembling the device
US20080015576 *Apr 27, 2007Jan 17, 2008Whipple Dale ELarge diameter bone anchor assembly
US20080015579 *Apr 27, 2007Jan 17, 2008Whipple Dale ELarge diameter bone anchor assembly
US20080243185 *Sep 27, 2007Oct 2, 2008Felix Brent ASpinal stabilizing system
US20080262551 *Apr 19, 2007Oct 23, 2008Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization system
US20090171401 *Dec 24, 2008Jul 2, 2009Thomas ZehnderPedicle screw with a closure device for securing a rod for stabilization of the vertebral column
US20090198281 *Feb 5, 2008Aug 6, 2009Zimmer Spine, Inc.System and method for insertion of flexible spinal stabilization element
US20100063545 *Oct 2, 2009Mar 11, 2010Richelsoph Marc EPolyaxial screw assembly
US20100185247 *Jul 22, 2010Richelsoph Marc EPolyaxial screw assembly
US20100312289 *Aug 25, 2010Dec 9, 2010Richelsoph Marc EPolyaxial screw assembly
US20110066191 *Nov 5, 2010Mar 17, 2011Jackson Roger PThreadform for medical implant closure
US20110093021 *Oct 16, 2009Apr 21, 2011Jonathan FangerBone Anchor Assemblies and Methods of Manufacturing and Use Thereof
US20110166604 *Jul 7, 2011Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization system
US20110184474 *Jul 28, 2011Richelsoph Marc EPolyaxial screw assembly
US20110270325 *Sep 29, 2009Nov 3, 2011Thomas KeyerPolyaxial bottom-loading screw and rod assembly
US20120046700 *Nov 1, 2011Feb 23, 2012Jackson Roger PPolyaxial bone anchor with pop-on shank and pivotable retainer
US20130103092 *Oct 25, 2011Apr 25, 2013Warsaw Orthopedic, Inc.Pre-assembled spinal construct and method of use
EP1931284A2 *Oct 5, 2006Jun 18, 2008Roger P. JacksonHelical reverse angle guide and advancement structure with break-off extensions
EP1933770A2 *Sep 29, 2006Jun 25, 2008Roger P. JacksonDynamic fixation assemblies with inner core and outer coil-like member
WO2007044645A2Oct 5, 2006Apr 19, 2007Jackson Roger PHelical reverse angle guide and advancement structure with break-off extensions
WO2007044645A3 *Oct 5, 2006Nov 22, 2007Roger P JacksonHelical reverse angle guide and advancement structure with break-off extensions
Classifications
U.S. Classification606/278, 606/266, 606/264
International ClassificationA61B17/58, A61B17/56, A61B17/86, A61B17/70
Cooperative ClassificationA61B17/8685, A61B17/7032, A61B17/7037, A61B17/7035
European ClassificationA61B17/70B5, A61B17/86P, A61B17/70B2, A61B17/70B5B
Legal Events
DateCodeEventDescription
Apr 8, 2005ASAssignment
Owner name: BIEDERMANN MOTECH GMBH, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BIEDERMANN, LUTZ;HARMS, JÜRGEN;REEL/FRAME:015877/0718
Effective date: 20050323