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 numberUS20050267474 A1
Publication typeApplication
Application numberUS 11/186,498
Publication dateDec 1, 2005
Filing dateJul 21, 2005
Priority dateJul 7, 2003
Publication number11186498, 186498, US 2005/0267474 A1, US 2005/267474 A1, US 20050267474 A1, US 20050267474A1, US 2005267474 A1, US 2005267474A1, US-A1-20050267474, US-A1-2005267474, US2005/0267474A1, US2005/267474A1, US20050267474 A1, US20050267474A1, US2005267474 A1, US2005267474A1
InventorsBrian Dalton
Original AssigneeDalton Brian E
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Bone fixation assembly and method of securement
US 20050267474 A1
Abstract
A bone plate is provided for fixation of spaced vertebra. The bone plate has at least one through passage for securing the plate to bone with a bone fixation screw. The threaded shaft of a bone fixation screw is inserted through a bushing located in the through passage of the bone plate and the screw is thereby threadably secured to the underlying bone and the bushing is then compressed inward against the head of the screw with cams that are actuated by rotating the bushing in the through passage whereby the screw is locked relative to the bone plate. The bushing is not only compressed inwardly against the head of the screw but is also compressed downwardly by the cams into a seat to clamp separate elements of the bone plate together.
Images(4)
Previous page
Next page
Claims(2)
1. A method for securing a bone plate having a through passage to bone, the method comprising the steps of:
inserting the shaft of a fastening screw having a head and a threaded shaft through a bushing located in the through passage of the bone plate;
threading the fastening screw into a bone; and
compressing the bushing inward against the head of the screw with cams actuated by rotating the bushing in the through passage whereby the screw is locked relative to the bone plate.
2. The method of claim 1 wherein the step of compressing also includes compressing the bushing downwardly into a seat to clamp separate elements of said bone plate together.
Description
    CROSS-REFERENCE
  • [0001]
    This application is a divisional application of application Ser. No. 10/731,625, filed Dec. 9, 2003 which is a continuation-in-part application of application Ser. No. 10/615,196, filed Jul. 7, 2003 entitled Spinal Stabilization Implant and Method of Application which is incorporated herein by reference in its entirety and for all purposes.
  • FIELD OF THE INVENTION
  • [0002]
    The present invention relates generally to spinal fixation systems. More particularly, the present invention pertains to a spinal plate assembly which includes a mechanism for fixably attaching and locking bone fixation screws to the plate at desired angles and for simultaneously locking otherwise adjustable portions of the plate together.
  • BACKGROUND OF THE INVENTION
  • [0003]
    Spinal surgery on the lumbar and thoracic spines have classically been open operations, meaning that the instrumentation used is placed through an incision that exposes all of the spine to be instrumented, as well as a portion of spine above and below the area to be instrumented due to the need for proper visualization. This extensive exposure disrupts a considerable amount of tissue, particularly the lumbar paraspinal musculature which needs to be stripped off the vertebra bones for exposure. This stripping leads to muscle damage directly caused by either electrical cautery or manual cutting or indirectly by interruption of vascular supply to the muscle due to coagulation or cutting of vessels, and caused also by embarrassment of the vascular supply during the course of surgery due to compression by retractors on the muscle which are required to maintain exposure. In addition, spinal implants can impact upon the facet joints of the spine, particularly the upper most pair of pedicle screws, which can cause pain or dysfunction of the involved joint. This is due in part to the fact that the pedicle screw systems are designed to give stability without being made to respect normal anatomy. In other words, the spine is forced to fit the metal, instead of fitting the metal to the spine.
  • [0004]
    The present day surgical approach therefore has added to patient morbidity due to the extent of the surgical exposure, tissue damage done primarily to the posterior longitudinal musculature of the spine during the exposure, blood loss and risk of infection. Large open operations also tend to be the cause of significant postoperative pain and disability. Accordingly, these issues lead to longer hospital stays, higher postoperative complications, such as phlebitis and pneumonia brought on by immobility, and greater consumption of postoperative medications with their resultant side affects. In addition, the paraspinal muscle tissue damage has been implicated in the genesis of postoperative lumbar mechanical dysfunction and stiffness, leading to postoperative pain syndromes or failed back syndrome. Also, interference by metal implants of the normal function of the rostral facet joints has been implicated in the early degeneration of these joints, as well as pain and disability, all which could lead to other more involved surgeries.
  • [0005]
    It is a principal object of the present invention to provide a system, including the spinal implant and a delivery system for applying the implant which allows for minimally invasive placement of the spinal implant, thereby reducing the undesired aforedescribed disadvantages of the prior art surgical procedures.
  • [0006]
    Another object of the present invention is to provide a bone fixation assembly which provides polyaxial locking of the screws to the plate and simultaneously, as required, locking of otherwise adjustable portions of the bone plate together for use in the spinal stabilization application method disclosed in corresponding U.S. application Ser. No. 10/615,196.
  • SUMMARY OF THE INVENTION
  • [0007]
    The bone fixation assembly of the present invention includes a bone plate having through passages for inserting the threaded shafts of fastening screws to secure the plate to underlying bone. The threaded screw shaft is inserted through a bushing located in the through passage of the bone plate and threadably secured into the underlying bone. The bushing is configured and dimensioned whereby it is compressed against the head of the screw with cams which are actuated by rotating the bushing in the through passage of the plate whereby the screw is locked relative to the bone plate. The bushing may also simultaneously be compressed downwardly into a seat in order to clamp separate elements of an otherwise adjustable bone plate together to securely lock them.
  • [0008]
    The head of the bone fixation screw has substantially frusto-spherical shaped side surfaces and the bushing in which the screw head is received has an interior surface which defines a socket bore that extends through upper and lower surfaces of the bushing and is configured and dimensioned for polyaxial rotation of the screw head therein. Exterior surfaces of the bushing are configured and dimensioned for limited axial rotation within the through passage of the fixation device or bone plate. At least one slot is located in the side wall of the bushing for allowing inward compression of the bushing bore against the screw head. A cam mechanism is disposed between the through passage of the plate and the bushing and is configured and dimensioned for inwardly compressing the bushing upon axial rotation of the bushing in the through passage whereby the bore is compressed against the screw head for locking the screw at a desired attitude relative to the fixation device or plate.
  • [0009]
    The bushing socket bore is provided with a substantially frusto-spherical shape with a central longitudinal axis to provide initial polyaxial rotation of the screw head therein. One slot within the bushing may extend from the upper surface of the bushing on through the lower surface of the bushing whereby the bushing is generally C-shaped and may thereby be more readily inwardly compressed with a cam mechanism.
  • [0010]
    In a preferred configuration the through passage of the fixation device is provided with an inverted frusto-conical seat and the exterior surface of the bushing is provided with a mating inverted frusto-conical base configured and dimensioned for seating in this seat. The seat and base are coaxial with the central axis of the bushing and through passage. The cam mechanism is comprised of annularly spaced upwardly extending ramp cams on the upper surface of the bushing and inwardly extending overhangs are provided on the through passage above the upper surface of the cams or bushing and this overhang is provided with downwardly facing cam following surfaces that are configured and dimensioned for engaging the ramp cams on the top of the bushing when the bushing is axially rotated in its seat. This rotation causes the bushing to be driven downwardly into its inverted frusto-conical seat by the ramp cams to thereby inwardly compress the bushing bore against the screw head. The cams and cam followers surfaces may also be provided for ridges to prevent back-out of the cams.
  • [0011]
    The bone fixation assembly of the present invention is intended to be used independently or in supplement to the bone fixation assembly and method of application described in the inventor's related application previously identified. The bone fixation device of this embodiment is adjustable and is provided with a first screw receiving socket element at a distal end of the plate assembly which is configured with a screw shank passage and a screw head seat for attachment to bone with the aid of a bone fixation screw. An elongate arm extends proximally from this first socket element and has an elongate through slot therealong. A second screw receiving socket element is provided and includes the aforedescribed through passage containing the bushing and cam mechanism. This second screw receiving socket element is slidably received over the arm with the socket bore thereof aligned over the slot for receiving the shank of a fixation screw therethrough for attachment to bone. The bushing seat includes portions of the through slot whereby the second socket element is clamped and locked to the arm when the bushing is pressed downwardly into the seat by the cam mechanism.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0012]
    Other objects and advantages appear hereinafter in the following description and claims. The accompanying drawings show, for the purpose of exemplification, without limiting the invention or appended claims, certain practical embodiments of the present invention wherein:
  • [0013]
    FIG. 1 is a plan view of the bone fixation assembly of the present invention without inclusion of the screw head bushings;
  • [0014]
    FIG. 2 is a view in front elevation and in vertical mid cross section of the bone fixation assembly shown in FIG. 1 as seen along section line A-A with inclusion of the screw head bushings;
  • [0015]
    FIG. 3 is a top view of the C-shaped compression bushing utilized in the assembly of FIGS. 1 and 2;
  • [0016]
    FIG. 4 is a view in right side elevation of the bushing shown in FIG. 3;
  • [0017]
    FIG. 5 is a view in front elevation of the bushing shown in FIG. 3;
  • [0018]
    FIG. 6 is a view in left side elevation of the bushing shown in FIG. 3; and
  • [0019]
    FIGS. 7, 8, 9 and 10 are sequential schematic representations illustrating the operation of the locking mechanism for the assembly shown in FIG. 1 as seen along section line B-B.
  • DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
  • [0020]
    Referring first to FIGS. 1 and 2, the bone fixation assembly 10 of the present invention is provided for stabilization of the spine and is an improved modification of the implant plate assembly shown and described in the inventor's aforementioned copending application for use in the inventive procedure therein described for minimum invasive surgical implantation of a plate assembly for fixation of the spine. The assembly 10 is comprised of two separate portions, a first portion 11 and a second portion 12 which are adjustably assembled together. The first portion 11 includes a first receiving socket element 13 at the distal end 14 of assembly 10. This first screw receiving socket element 13 is configured with a screw shank through passage 15 for attachment of element 13 to vertebra bone with the aid of a bone fixation screw 23 as seen in FIG. 2. The plan view of FIG. 1 does not include the bone fixation screws and other interior parts which are included in FIG. 2 in order to provide an exposed view of the screw shank through passage interiors of elements 12 and 13.
  • [0021]
    First portion 11 further includes an elongate arm 18 extending proximally from the first socket element 13. Elongate arm 18 is provided with an elongate through slot 20 therealong. The second portion 12 of assembly 10 comprises a second screw receiving socket element which is also configured with a screw shank through passage 22. Second screw receiving socket element 12 is slidably received over arm 18 with its through passage 22 centered over and aligned over slot 20 for receiving the shank 24 of a fixation screw 23 therethrough for attachment to underlying vertebra bone. The bone fixation or fastening screws 23 have threaded shanks or shafts 24 for insertion through the respective through passages 15 and 22 and they also are provided with heads 25 which have substantially frusto-spherical shaped side surfaces.
  • [0022]
    Bushings 30 are provided for each socket element 12 and 13 to receive the respective screw heads 25. These bushings have upper surfaces 31 and lower surfaces 32 and a side wall 33. The detail of these bushings 30 are best illustrated in FIGS. 3, 4, 5 and 6.
  • [0023]
    The side wall 33 of each bushing 30 is provided with an exterior surface 34 which is configured in dimension for axial rotation within the respective through passages 15 and 22 of screw socket receiving elements 12 and 13. The interior surface 35 of bushings 30 defines a socket bore that extends through the upper and lower surfaces 31 and 32 and is configured and dimensioned for polyaxial rotation of screw head 25 therein. Plural slots 36 are provided in the side wall 33 for allowing inward compression of bore 35 against screw head 25. A cam mechanism 37 is disposed between through passages 15 and 22 and bushings 30 and this cam mechanism 37 is configured and dimensioned for inwardly compressing bushing 30 upon axial rotation of each bushing 30 in its respective through passage 15 and 22 whereby the bore 35 of bushing 30 is compressed against its respective screw head 25 received therein for locking the screw 23 at a desired attitude relative to the fixation plate or device 10. The bushing socket bore 35 has a substantially frusto-spherical shape to compliment the screw heads 25 and has its central longitudinal axis perpendicular to upper and lower surfaces 31 and 32. Also, one of the slots 36 in the form of slot 38 for bushing 30 extends fully through side wall 33 from the upper surface 31 through the lower surface 32. This provides a C-shape to bushing 30 and permits greater compression of the bushing.
  • [0024]
    The bottom portion of each through passage 15 and 22 is provided with an inverted frusto-conical seat 39 and the exterior surface 33 of the bushings 30 are provided with a mating inverted frusto-conical base 40 configured and dimensioned for seating respectively in said seats 39. Seat 39 and base 40 are coaxial with the central axis of the bushing bore 35.
  • [0025]
    The cam mechanism 37 includes annularly spaced upwardly extending ramp cams 41 on the upper surface 31 of bushing 30 and inwardly extending overhangs 42 on the through passages 15 and 22 which are positioned above the upper surface 31 of cams 30. Overhangs 42 are provided with downwardly facing cam following surfaces 43 configured and dimensioned for engaging the cam ramps 41 when bushing 30 is axially rotated in either through passage 15 or 22 whereby the bushing 30 is driven downwardly into seat 39 by the ramp cams 41 to thereby inwardly compress bushing bore 35 against a screw head 25.
  • [0026]
    This cam mechanism 37 further includes radially extending ramp cams 44 on the exterior surface 33 of bushing 30 and these additional ramp cams are dimensioned and configured for also compressing socket bore 35 inwardly when bushing 30 is axially rotated in through passage 15 or 22 due to the manner in which the side walls of through passages 15 and 22 are configured. As illustrated in FIGS. 3 through 6, the ramp cams 41 and 44 are provided with ridges to prevent rotary back off of the cam 30 after it has been secured within respective through passage 15 or 22.
  • [0027]
    The bushing seat 39 for second socket receiving element 12 includes sloped mating portions 50 of through slot 22 for arm 18 whereby second socket receiving element 12 is firmly clamped to arm 18 when bushing 30 is pressed downwardly into through passage 22 onto seat 39 by the cam mechanism 37. Bushing 30 not only securely locks screw head 35 at a desired attitude, but simultaneously also securely locks second screw socket receiving element 12 to arm 18 at the position desired. This locking capability is schematically illustrated step by step in FIGS. 7 through 10. The schematic illustrations are generally intended to show a cross section through the fixation device 10 of FIG. 1 as seen along section line B-B. However, for the purposes of simplification of illustration, the exact orientation of the bushings 30 relative to the device 10 is not identical to that illustrated in FIGS. 1 and 2.
  • [0028]
    FIG. 7 illustrates the ready position as the parts are initially assembled ready for application. The bushing 30 has been inserted into socket receiving element 12. This is accomplished at the manufacturing stage by compressing the C-shaped bushing 30 sufficiently that it will pass through upper passage 51 of element 12. After insertion, bushing 30 is released from compression and the outer edges of upper surface 31 expand radially outward whereby they underlie overhangs 42. This prevents bushing 30 from accidentally dislodging from element 12.
  • [0029]
    Note that in this ready position the upper lip diameter d of bushing 30 is slightly less that the diameter of screw head 25 and that the lower lip diameter d′ is less than the diameter screw head 25. Accordingly, in the second step of the process, screw shank 24 is inserted through the bushing bore 35 and on through passage 22 of element 12 and the head 25 is then forcibly radially expands bushing 30 and the head 25 snaps down into the bushing 30 where it is retained in bushing bore 35, the diameter d′ being too small for forcible passage of the head 25 therethrough. This step is accomplished by screwing threaded shank 24 of screw 23 into underlying vertebra until head 25 snaps downwardly into bushing 30 as illustrated in FIG. 8. To accomplish this, screw 25 is of course rotated clockwise as indicated by the arrow.
  • [0030]
    The next step is then schematically illustrated in FIG. 9 wherein bushing 30 is rotated counterclockwise as indicated by the arrow at the top of FIG. 9. This is accomplished by an outer 8 toothed Phillips' type driver which engages slots 36 and which has a hollow shaft interior whereby it is arranged or coaxially received over a central hex-driver for driving the screws 23. This combination of screwdrivers is not shown but can be easily visualized and permits the surgeon to retain screw head 25 stationary while rotating the bushing 30 counterclockwise.
  • [0031]
    Due to the cam mechanism 41, which provides upwardly protruding cam ramps 37 and radially protruding ramp cams 44, this counterclockwise turn of bushing 30 causes the radially extending ramp cams 44 to compress bushing 30 and corresponding bore 35 inwardly and to thereby firmly engage screw head 25 and continuing counterclockwise turning of bushing 30 also causes bushing 30 to drive downward into seat 39 as further illustrated in FIG. 10 thereby locking screw head 25 in its trajectory relative to fixation device 10 due to the action of ramp cams 41 acting against follower cam surfaces 43 of overhangs 42. This securely locks arm 18 relative to socket receiving element 12 and further securely locks screw 23 at the given attitude to the entire device 10.
  • [0032]
    As is best illustrated in FIG. 2, the follower cams 43 of overhangs 42 may be provided with downwardly extending ramp cams as illustrated to compliment the upwardly extending ramp cams 41 of bushings 30. The follower cam surfaces 41 and also the radially facing cam surfaces 49 of element 12 may be provided with complimentary ridges to prevent rotary back-out of the bushing 30 after it is locked into position.
  • [0033]
    The through slot 57 and retainer slot 56 on the proximal end 41 of bone fixation device 10 is provided for coupling the device to an insertion gun as described and illustrated in the inventor's aforesaid copending application for minimum invasive surgical application of the device of the present invention. For more information in this regard, one should refer to this document and it is accordingly incorporated herein by reference.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US4696290 *Mar 31, 1986Sep 29, 1987Acromed CorporationApparatus for straightening spinal columns
US4790297 *Jul 24, 1987Dec 13, 1988Biotechnology, Inc.Spinal fixation method and system
US5129899 *Mar 27, 1991Jul 14, 1992Smith & Nephew Richards Inc.Bone fixation apparatus
US5209751 *Feb 19, 1992May 11, 1993Danek Medical, Inc.Spinal fixation system
US5234431 *Apr 2, 1992Aug 10, 1993Waldemar Link Gmbh & Co.Bone plate arrangement
US5290288 *Feb 8, 1991Mar 1, 1994Vignaud Jean LouisMulti-function device for the osteosynthesis of rachis
US5531746 *May 22, 1995Jul 2, 1996Fastenetix, L.L.C.Posterior spinal polyaxial locking lateral mass screw plate assembly
US5540690 *Feb 15, 1995Jul 30, 1996Danek Group Inc.Spinal fixation system
US5545163 *Jul 15, 1992Aug 13, 1996Danek Medical, Inc.Spinal fixation system
US5556687 *Oct 14, 1994Sep 17, 1996Acromed CorporationComposite structure suitable for use as a bone plate and method for making said structure
US5607426 *Feb 23, 1996Mar 4, 1997Fastenletix, L.L.C.Threaded polyaxial locking screw plate assembly
US5620443 *Jan 25, 1995Apr 15, 1997Danek Medical, Inc.Anterior screw-rod connector
US5728127 *Jun 27, 1995Mar 17, 1998Acro Med CorporationApparatus for maintaining vertebrae of a spinal column in a desired spatial relationship
US5876402 *Mar 29, 1996Mar 2, 1999Errico; Joseph P.Anterior spinal polyaxial locking screw plate assembly having recessed retaining rings
US6022443 *Jan 25, 1994Feb 8, 2000Kimberly-Clark Worldwide, Inc.Method and apparatus for placing discrete parts onto a moving web
US6053919 *Jul 3, 1995Apr 25, 2000Synthes (U. S. A)Bone fragment-fixing device
US6074423 *Nov 2, 1998Jun 13, 2000Lawson; Kevin JonSafer more X-ray transparent spinal implant
US6235033 *Apr 19, 2000May 22, 2001Synthes (Usa)Bone fixation assembly
US6261291 *Jul 8, 1999Jul 17, 2001David J. TalaberOrthopedic implant assembly
US6280445 *Mar 15, 2000Aug 28, 2001Sdgi Holdings, Inc.Multi-axial bone anchor system
US6331179 *Jan 6, 2000Dec 18, 2001Spinal Concepts, Inc.System and method for stabilizing the human spine with a bone plate
US6402756 *Feb 15, 2001Jun 11, 2002Third Millennium Engineering, LlcLongitudinal plate assembly having an adjustable length
US6530926 *Aug 1, 2000Mar 11, 2003Endius IncorporatedMethod of securing vertebrae
US6565565 *Jan 19, 2000May 20, 2003Howmedica Osteonics Corp.Device for securing spinal rods
US6575975 *May 4, 2001Jun 10, 2003Synthes (U.S.A.)Bone fixation method
US6602255 *Sep 19, 2000Aug 5, 2003Stryker SpineBone screw retaining system
US6641583 *Mar 29, 2001Nov 4, 2003Endius IncorporatedApparatus for retaining bone portions in a desired spatial relationship
US6945974 *Jul 7, 2003Sep 20, 2005Aesculap Inc.Spinal stabilization implant and method of application
US7232441 *Feb 5, 2003Jun 19, 2007Cross Medicalproducts, Inc.Occipital plate and rod system
US20020045899 *Nov 2, 2001Apr 18, 2002Errico Joseph P.Anterior cervical plate having polyaxial locking screws and sliding coupling elements
US20030149431 *Feb 1, 2002Aug 7, 2003Varieur Michael S.Closure system for spinal fixation instrumentation
US20040127896 *Oct 1, 2003Jul 1, 2004Alan LombardoBone plate assembly provided with screw locking mechanisms
US20040127900 *Dec 31, 2002Jul 1, 2004Konieczynski David D.Resilient bone plate and screw system allowing bi-directional assembly
US20040177847 *Mar 10, 2003Sep 16, 2004Foley Kevin T.Posterior pedicle screw and plate system and methods
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7662175Apr 5, 2004Feb 16, 2010Jackson Roger PUpload shank swivel head bone screw spinal implant
US7766915Sep 14, 2006Aug 3, 2010Jackson Roger PDynamic fixation assemblies with inner core and outer coil-like member
US7875065Apr 1, 2008Jan 25, 2011Jackson Roger PPolyaxial bone screw with multi-part shank retainer and pressure insert
US7901437Jan 8, 2008Mar 8, 2011Jackson Roger PDynamic stabilization member with molded connection
US7935137Dec 8, 2004May 3, 2011Depuy Spine, Inc.Locking bone screw and spinal plate system
US7942909Aug 13, 2009May 17, 2011Ortho Innovations, LlcThread-thru polyaxial pedicle screw system
US7942910May 16, 2007May 17, 2011Ortho Innovations, LlcPolyaxial bone screw
US7942911Jun 12, 2009May 17, 2011Ortho Innovations, LlcPolyaxial bone screw
US7947065Jan 16, 2009May 24, 2011Ortho Innovations, LlcLocking polyaxial ball and socket fastener
US7951170May 30, 2008May 31, 2011Jackson Roger PDynamic stabilization connecting member with pre-tensioned solid core
US7951173Feb 4, 2010May 31, 2011Ortho Innovations, LlcPedicle screw implant system
US7967850Oct 29, 2008Jun 28, 2011Jackson Roger PPolyaxial bone anchor with helical capture connection, insert and dual locking assembly
US8012177Jun 19, 2009Sep 6, 2011Jackson Roger PDynamic stabilization assembly with frusto-conical connection
US8025681Mar 29, 2007Sep 27, 2011Theken Spine, LlcDynamic motion spinal stabilization system
US8066739Dec 6, 2007Nov 29, 2011Jackson Roger PTool system for dynamic spinal implants
US8092500Sep 15, 2009Jan 10, 2012Jackson Roger PDynamic stabilization connecting member with floating core, compression spacer and over-mold
US8092502Oct 5, 2007Jan 10, 2012Jackson Roger PPolyaxial bone screw with uploaded threaded shank and method of assembly and use
US8100915Sep 4, 2009Jan 24, 2012Jackson Roger POrthopedic implant rod reduction tool set and method
US8105368Aug 1, 2007Jan 31, 2012Jackson Roger PDynamic stabilization connecting member with slitted core and outer sleeve
US8128667Oct 5, 2007Mar 6, 2012Jackson Roger PAnti-splay medical implant closure with multi-surface removal aperture
US8137386Aug 28, 2003Mar 20, 2012Jackson Roger PPolyaxial bone screw apparatus
US8152810Nov 23, 2004Apr 10, 2012Jackson Roger PSpinal fixation tool set and method
US8162948Jul 22, 2008Apr 24, 2012Jackson Roger POrthopedic implant rod reduction tool set and method
US8197518Jul 28, 2010Jun 12, 2012Ortho Innovations, LlcThread-thru polyaxial pedicle screw system
US8216240Apr 24, 2006Jul 10, 2012Warsaw OrthopedicCam based reduction instrument
US8257396May 23, 2008Sep 4, 2012Jackson Roger PPolyaxial bone screw with shank-retainer inset capture
US8257398Jan 16, 2008Sep 4, 2012Jackson Roger PPolyaxial bone screw with cam capture
US8257402Feb 20, 2004Sep 4, 2012Jackson Roger PClosure for rod receiving orthopedic implant having left handed thread removal
US8273089Sep 29, 2006Sep 25, 2012Jackson Roger PSpinal fixation tool set and method
US8273109Apr 26, 2004Sep 25, 2012Jackson Roger PHelical wound mechanically interlocking mating guide and advancement structure
US8282673Feb 20, 2004Oct 9, 2012Jackson Roger PAnti-splay medical implant closure with multi-surface removal aperture
US8282675Jan 25, 2008Oct 9, 2012Depuy Spine, Inc.Anti-backout mechanism
US8292892May 13, 2009Oct 23, 2012Jackson Roger POrthopedic implant rod reduction tool set and method
US8292926Aug 17, 2007Oct 23, 2012Jackson Roger PDynamic stabilization connecting member with elastic core and outer sleeve
US8308782Aug 3, 2010Nov 13, 2012Jackson Roger PBone anchors with longitudinal connecting member engaging inserts and closures for fixation and optional angulation
US8353932Aug 20, 2008Jan 15, 2013Jackson Roger PPolyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member
US8361130Oct 5, 2007Jan 29, 2013Depuy Spine, Inc.Bone screw fixation
US8366745Jul 1, 2009Feb 5, 2013Jackson Roger PDynamic stabilization assembly having pre-compressed spacers with differential displacements
US8366753Jun 26, 2006Feb 5, 2013Jackson Roger PPolyaxial bone screw assembly with fixed retaining structure
US8377067Jan 24, 2012Feb 19, 2013Roger P. JacksonOrthopedic implant rod reduction tool set and method
US8377100May 9, 2002Feb 19, 2013Roger P. JacksonClosure for open-headed medical implant
US8377102Mar 26, 2010Feb 19, 2013Roger P. JacksonPolyaxial bone anchor with spline capture connection and lower pressure insert
US8394133Jul 23, 2010Mar 12, 2013Roger P. JacksonDynamic fixation assemblies with inner core and outer coil-like member
US8398682May 12, 2010Mar 19, 2013Roger P. JacksonPolyaxial bone screw assembly
US8419776Nov 18, 2010Apr 16, 2013Memometal TechnologiesRadius-plate assembly
US8444681Apr 13, 2012May 21, 2013Roger P. JacksonPolyaxial bone anchor with pop-on shank, friction fit retainer and winged insert
US8460348Mar 24, 2011Jun 11, 2013Depuy Spine, Inc.Locking bone screw and spinal plate system
US8465530May 6, 2011Jun 18, 2013Ortho Innovations, LlcLocking polyaxial ball and socket fastener
US8475498Jan 3, 2008Jul 2, 2013Roger P. JacksonDynamic stabilization connecting member with cord connection
US8496692Sep 21, 2009Jul 30, 2013Jmea CorporationLocking securing member
US8506599Aug 5, 2011Aug 13, 2013Roger P. JacksonDynamic stabilization assembly with frusto-conical connection
US8540753Oct 5, 2004Sep 24, 2013Roger P. JacksonPolyaxial bone screw with uploaded threaded shank and method of assembly and use
US8545538Apr 26, 2010Oct 1, 2013M. Samy AbdouDevices and methods for inter-vertebral orthopedic device placement
US8556938Oct 5, 2010Oct 15, 2013Roger P. JacksonPolyaxial bone anchor with non-pivotable retainer and pop-on shank, some with friction fit
US8579898Nov 18, 2010Nov 12, 2013Memometal TechnologiesAdjustable-angle radius plate
US8591515Aug 26, 2009Nov 26, 2013Roger P. JacksonSpinal fixation tool set and method
US8591552Aug 2, 2012Nov 26, 2013Roger P. JacksonAnti-splay medical implant closure with multi-surface removal aperture
US8591560Aug 2, 2012Nov 26, 2013Roger P. JacksonDynamic stabilization connecting member with elastic core and outer sleeve
US8613760Dec 14, 2011Dec 24, 2013Roger P. JacksonDynamic stabilization connecting member with slitted core and outer sleeve
US8636769Jun 18, 2012Jan 28, 2014Roger P. JacksonPolyaxial bone screw with shank-retainer insert capture
US8696711Jul 30, 2012Apr 15, 2014Roger P. JacksonPolyaxial bone anchor assembly with one-piece closure, pressure insert and plastic elongate member
US8814911May 12, 2011Aug 26, 2014Roger P. JacksonPolyaxial bone screw with cam connection and lock and release insert
US8814913Sep 3, 2013Aug 26, 2014Roger P JacksonHelical guide and advancement flange with break-off extensions
US8840652Oct 22, 2012Sep 23, 2014Roger P. JacksonBone anchors with longitudinal connecting member engaging inserts and closures for fixation and optional angulation
US8845649May 13, 2009Sep 30, 2014Roger P. JacksonSpinal fixation tool set and method for rod reduction and fastener insertion
US8852239Feb 17, 2014Oct 7, 2014Roger P JacksonSagittal angle screw with integral shank and receiver
US8870928Apr 29, 2013Oct 28, 2014Roger P. JacksonHelical guide and advancement flange with radially loaded lip
US8876868Apr 8, 2005Nov 4, 2014Roger P. JacksonHelical guide and advancement flange with radially loaded lip
US8894650Mar 12, 2013Nov 25, 2014Memometal TechnologiesRadius plate assembly
US8894657Nov 28, 2011Nov 25, 2014Roger P. JacksonTool system for dynamic spinal implants
US8900272Jan 28, 2013Dec 2, 2014Roger P JacksonDynamic fixation assemblies with inner core and outer coil-like member
US8911477Oct 21, 2008Dec 16, 2014Roger P. JacksonDynamic stabilization member with end plate support and cable core extension
US8911478Nov 21, 2013Dec 16, 2014Roger P. JacksonSplay control closure for open bone anchor
US8911479Jan 10, 2013Dec 16, 2014Roger P. JacksonMulti-start closures for open implants
US8926670Mar 15, 2013Jan 6, 2015Roger P. JacksonPolyaxial bone screw assembly
US8926672Nov 21, 2013Jan 6, 2015Roger P. JacksonSplay control closure for open bone anchor
US8936623Mar 15, 2013Jan 20, 2015Roger P. JacksonPolyaxial bone screw assembly
US8979904Sep 7, 2012Mar 17, 2015Roger P JacksonConnecting member with tensioned cord, low profile rigid sleeve and spacer with torsion control
US8998959Oct 19, 2011Apr 7, 2015Roger P JacksonPolyaxial bone anchors with pop-on shank, fully constrained friction fit retainer and lock and release insert
US8998960May 17, 2013Apr 7, 2015Roger P. JacksonPolyaxial bone screw with helically wound capture connection
US9050139Mar 15, 2013Jun 9, 2015Roger P. JacksonOrthopedic implant rod reduction tool set and method
US9055978Oct 2, 2012Jun 16, 2015Roger P. JacksonOrthopedic implant rod reduction tool set and method
US9101404Jan 26, 2011Aug 11, 2015Roger P. JacksonDynamic stabilization connecting member with molded connection
US9119676Dec 21, 2012Sep 1, 2015DePuy Synthes Products, Inc.Bone screw fixation
US9144444May 12, 2011Sep 29, 2015Roger P JacksonPolyaxial bone anchor with helical capture connection, insert and dual locking assembly
US9168069Oct 26, 2012Oct 27, 2015Roger P. JacksonPolyaxial bone anchor with pop-on shank and winged insert with lower skirt for engaging a friction fit retainer
US9198695Feb 27, 2013Dec 1, 2015Zimmer Spine, Inc.Polyaxial pedicle screw
US9198769 *Dec 21, 2012Dec 1, 2015Pioneer Surgical Technology, Inc.Bone anchor assembly, bone plate system, and method
US9211150Sep 23, 2010Dec 15, 2015Roger P. JacksonSpinal fixation tool set and method
US9216039Nov 19, 2010Dec 22, 2015Roger P. JacksonDynamic spinal stabilization assemblies, tool set and method
US9216041Feb 8, 2012Dec 22, 2015Roger P. JacksonSpinal connecting members with tensioned cords and rigid sleeves for engaging compression inserts
US9226775May 10, 2013Jan 5, 2016DePuy Synthes Products, Inc.Locking bone screw and spinal plate system
US9308027Sep 13, 2013Apr 12, 2016Roger P JacksonPolyaxial bone screw with shank articulation pressure insert and method
US9320545Jan 14, 2011Apr 26, 2016Roger P. JacksonPolyaxial bone screw with multi-part shank retainer and pressure insert
US9393047Sep 7, 2012Jul 19, 2016Roger P. JacksonPolyaxial bone anchor with pop-on shank and friction fit retainer with low profile edge lock
US9414863Jul 31, 2012Aug 16, 2016Roger P. JacksonPolyaxial bone screw with spherical capture, compression insert and alignment and retention structures
US9439683Mar 10, 2015Sep 13, 2016Roger P JacksonDynamic stabilization member with molded connection
US9451989Sep 8, 2011Sep 27, 2016Roger P JacksonDynamic stabilization members with elastic and inelastic sections
US9451993Jan 7, 2015Sep 27, 2016Roger P. JacksonBi-radial pop-on cervical bone anchor
US9480517Oct 10, 2012Nov 1, 2016Roger P. JacksonPolyaxial bone anchor with pop-on shank, shank, friction fit retainer, winged insert and low profile edge lock
US20060122604 *Dec 8, 2004Jun 8, 2006Depuy Spine, Inc.Locking bone screw and spinal plate system
US20070270868 *Apr 24, 2006Nov 22, 2007Sdgi Holdings, Inc.Cam based reduction instrument
US20110172719 *Mar 24, 2011Jul 14, 2011Depuy Spine, Inc.Locking Bone Screw and Spinal Plate System
US20130190825 *Dec 21, 2012Jul 25, 2013Pioneer Surgical Technology, Inc.Bone Anchor Assembly, Bone Plate System, And Method
Classifications
U.S. Classification606/281, 606/71
International ClassificationA61B17/56, A61B17/58, A61B17/70, A61B17/80
Cooperative ClassificationA61B17/7059, A61B17/8047
European ClassificationA61B17/70K, A61B17/80D6