Including Retaining Ring Patents (Class 606/269)
  • Patent number: 10258385
    Abstract: The bottom loading fastening system that consists of the polyaxial ball and socket joint used in conjunction with a bone screw. The system allows attachment to a bone screw using a retaining ring with a blocker ring to assure proper ring positioning. The retaining ring having a continuous inner surface wall and an outer wall having a notch. Upon installation the retainer wall is expanded causing a break at the notch producing an audible and tactile indication that the sufficient force has been applied to set the retainer and blocker rings locking the bone screw to a U-shaped connecting assembly.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: April 16, 2019
    Assignee: Spinal LLC
    Inventors: Robert L. Doubler, John E. Hammill, Sr.
  • Patent number: 10182844
    Abstract: A polyaxial bone anchor including a housing, a bone screw, and a retainer for pivotably coupling the head of the bone screw to the housing. The retainer is positioned into the bore of the housing and includes a plurality of alternating tabs and slots circumferentially arranged to define a cavity for receiving the head portion of the bone screw therein. The retainer is axially moveable in the housing from a first position in which the head portion is not passable through the lower opening of the retainer to a second position in which the head portion is passable through the lower opening of the retainer.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: January 22, 2019
    Assignee: Zimmer Spine, Inc.
    Inventors: Alan E Shluzas, Hugh D Hestad
  • Patent number: 10076361
    Abstract: A polyaxial bone screw assembly includes a receiver, a shank, an articulation structure for retaining the shank in the receiver and a compression insert for engagement with a longitudinal connecting member such as a rod. The articulation structure includes substantially spherical convex and concave surfaces that slidably engage both shank and receiver surfaces to provide compound articulation between the receiver and the shank. The receiver includes inwardly directed spring tabs engaging the insert and prohibiting rotation of the insert within the receiver.
    Type: Grant
    Filed: February 26, 2008
    Date of Patent: September 18, 2018
    Inventor: Roger P. Jackson
  • Patent number: 9895171
    Abstract: A modular polyaxial bone screw that incorporates a threaded screw including a head portion and a tulip assembly that selectively “snaps” and locks onto the head portion of the threaded screw in a desired orientation. Thus, the threaded screw may be placed in bone before the tulip assembly is engaged onto the head portion of the threaded screw and a rod is disposed and secured there through using a locking cap, thereby locking the tulip assembly onto the head portion of the threaded screw in the desired orientation.
    Type: Grant
    Filed: July 29, 2015
    Date of Patent: February 20, 2018
    Assignee: Transcendental Spine, LLC
    Inventor: Scott A. Webb
  • Patent number: 9504498
    Abstract: A polyaxial bone anchor has a locking element shaped and configured to allow an anchoring member (e.g., a screw or hook) to polyaxially rotate at large angles about a central axis of the bone anchor before compression locking the anchoring member within an anchor head.
    Type: Grant
    Filed: November 29, 2012
    Date of Patent: November 29, 2016
    Assignee: DePuy Synthes Products, Inc.
    Inventors: William L. Strausbaugh, Sean Saidha, Boyd A. Wolf
  • Patent number: 9393048
    Abstract: A bone screw assembly includes a screw, an outer housing, and an inner housing. The screw includes a shank and a head. The outer housing has a proximal end, a distal end, and a passageway extending longitudinally therethrough. The outer housing defines a saddle at the proximal end thereof for receiving at least a portion of a rod therein. The inner housing is positionable within the passageway of the outer housing. The inner housing has a recessed distal portion for receiving the head of the screw therein. The inner housing also includes a proximal surface defining a substantially V-shaped configuration for receiving rods of different diameters therein.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: July 19, 2016
    Assignee: K2M, Inc.
    Inventors: John Carbone, Oheneba Boachie-Adjei, Larry McClintock, Kevin R. Strauss
  • Patent number: 9259247
    Abstract: Various exemplary methods and devices are provided for fixing bone anchors to bone. In general, the methods and devices can allow for a bone anchor to be fixed to a bone at a desired angle to a surface of the bone. In an exemplary embodiment, a bone anchor assembly is provided that includes a bone anchor configured to engage bone, a receiver member for seating a head of the bone anchor, and a compression member for securing the bone anchor at fixed angle with respect to the receiver member when the compression member is seated within the receiver member. Corresponding engagement features of the compression member and the receiver member can be engaged in a secured configuration to inhibit or prevent removal of the compression cap from the receiver member and optionally to substantially prevent longitudinal and/or rotational movement of the compression member with respect to the receiver member.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 16, 2016
    Assignee: Medos International Sarl
    Inventors: Thibault Chandanson, Ernest Quintanilha, Frank Spratt, Philip A. Cormier
  • Patent number: 8998959
    Abstract: A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The receiver can have crimp tabs, but is devoid of spring tabs and collet-like flexible structures. A down-loadable compression insert (some with lock and release feature), a down-loadable friction fit split retaining ring having super structure for temporary friction fit with an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled.
    Type: Grant
    Filed: October 19, 2011
    Date of Patent: April 7, 2015
    Inventors: Roger P Jackson, James L Surber
  • Publication number: 20150080959
    Abstract: An osseous anchoring implant, various embodiments of which comprise an osseous anchor and a head bearing fixation structure capable of receiving and fixing at least one bar, the head of the implant being traversed by at least one duct, which receives the bar through a lateral aperture, and by a threaded channel, whose axis is not parallel to the axis of the duct, which receives a fixation screw of the bar, the implant being characterized in that it comprises fixation structure of the head on the part of the implant which extends from the osseous anchor, these fixation structures allowing, prior to blocking and fixing, at least a determined mobility of the head around at least one axis not parallel to the axis of symmetry of the osseous anchor. The fixation screw of the bar may comprise a ball and socket at its base.
    Type: Application
    Filed: September 26, 2014
    Publication date: March 19, 2015
    Inventors: Christian Renaud, Gerard Castera
  • Patent number: 8940024
    Abstract: A bone anchoring device includes a bone anchoring element having a shaft and a head; and a receiving part for coupling a rod to the bone anchoring element. The receiving part includes a first portion with a U-shaped recess for receiving the rod, and a second portion for accommodating the head, the second portion having a free end and being flexible so as to allow introduction and clamping of the head. The bone anchoring device also includes a locking ring embracing the second portion. The head is locked by means of exerting pressure with the rod onto the locking ring resulting in compression of the second portion of the receiving part and wherein the locking ring is mounted to the receiving part from the free end of the second portion.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: January 27, 2015
    Assignee: Biedermann Technologies GmbH & Co. KG
    Inventors: Lutz Biedermann, Wilfried Matthis, Berthold Dannecker
  • Publication number: 20150012042
    Abstract: An orthopedic implantation device that includes tulip element, a coupling wedge and a locking assembly, and a kit and method of use thereof are described herein. The coupling wedge is located in the bottom of the tulip element. The tulip element includes transverse slots for receiving the rod therein until the rod sits on the coupling wedge. The locking assembly includes a locking cap adapted to be received completely within the tulip element, and having flanges and tabs that cooperate with corresponding grooves in the tulip element. The locking assembly includes a cap set screw adapted to be received within a thru hole in the locking cap element.
    Type: Application
    Filed: July 1, 2014
    Publication date: January 8, 2015
    Inventor: Michael Black
  • Patent number: 8915945
    Abstract: Coupling assemblies and systems and methods are provided with an anchor member movably coupled with a receiver member extending along a receiver axis. A seat member is movable in the receiver member to assume any one of a plurality of orientations corresponding to an orientation of a connecting element extending through the receiver member transversely to the receiver axis.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: December 23, 2014
    Assignee: Warsaw Orthopedic, Inc.
    Inventors: Robert Carson, Rodney Ray Ballard, James Mirda
  • Publication number: 20140350605
    Abstract: An implant having a receiver that is adapted to receive a polyaxial screw in the bore and either an internal or external cap. The cap can be an external or internal cap and the implant further has at least one locking aid in the form of at least one of a tactile feedback, a visual feedback or an enhanced fixation between the cap and a rod that is received in the receiver.
    Type: Application
    Filed: August 11, 2014
    Publication date: November 27, 2014
    Applicant: X-SPINE SYSTEMS, INC.
    Inventor: David Louis Kirschman
  • Patent number: 8870919
    Abstract: The disclosure relates generally to embodiments of systems and methods of spinal stabilization. Embodiments include methods that use a dilator to displace tissue proximate to a sleeve. An embodiment of a surgical system can comprise a dilator that may define a working channel from a first opening to a second opening. The dilator can be positioned to displace tissue proximate to the sleeve. The dilator may be shaped to allow a first end of an elongated member to enter the working channel through the first opening and exit the dilator through the second opening to be percutaneously moved to another assembly.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: October 28, 2014
    Assignee: Zimmer Spine, Inc.
    Inventors: Peter Thomas Miller, Brian J. Bergeron
  • Publication number: 20140243899
    Abstract: A receiving part for receiving a rod for coupling the rod to a bone anchoring element includes a receiving part body including: a rod receiving portion with a channel for receiving a rod, and a head receiving portion for accommodating a head of a bone anchoring element, the head receiving portion having an open end and being flexible for inserting and clamping of the head, and an exterior surface with a curved portion; and a locking ring around the head receiving portion, wherein the locking ring has an interior surface with a curved portion for engagement with the curved portion of the exterior surface of the head receiving portion for locking a position of the head relative to the head receiving portion.
    Type: Application
    Filed: December 30, 2013
    Publication date: August 28, 2014
    Applicant: Biedermann Technologies GmbH & Co. KG
    Inventors: Lutz Biedermann, Wilfried Matthis, Berthold Dannecker
  • Publication number: 20140228889
    Abstract: An apparatus (10) includes a fastener (16) engageable with a bone portion to connect a longitudinal member (12) to the bone portion. A housing (40) has a first passage (42) configured to receive the longitudinal member (12) and a second passage (44) extending transverse to the first passage. The fastener (16) extends through an opening (50) in the housing (40) into the second passage (44). A longitudinal axis (18) of the fastener (16) is positionable in any one of a plurality of angular positions relative to a longitudinal axis (46) of the second passage (44). A spacer (60) received in the second passage (44) of the housing (40) is engageable with the fastener (16) and the longitudinal member (12). A member (70) applies a force to prevent relative movement between the fastener (16) and the housing (40) and permit manual movement of the fastener (16) relative to the housing (40) against the force when the longitudinal member (12) is disengaged from the spacer (60).
    Type: Application
    Filed: April 28, 2014
    Publication date: August 14, 2014
    Applicant: Zimmer Spine, Inc.
    Inventor: Alan E. Shluzas
  • Patent number: 8764805
    Abstract: A stabilization assembly for stabilizing a vertebra or other bone includes: at least two rods having different diameters; an anchoring element having a shaft and a head; a receiving part for interchangeably receiving any one of the rods to connect the rod to the anchoring element, the receiving part including a rod receiving portion with a channel for receiving the rod, and a head receiving portion having an open end and being flexible to allow introduction and clamping of the head; and a locking ring configured to be arranged around the head receiving portion and to clamp the head in the head receiving portion; wherein the locking ring includes a contact surface configured to contact any one of the at least two rods at at least two distinct contact areas that are spaced apart from one another in a circumferential direction of the rod.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: July 1, 2014
    Assignee: Biedermann Technologies GmbH & Co. KG
    Inventors: Lutz Biedermann, Wilfried Matthis, Berthold Dannecker
  • Patent number: 8740947
    Abstract: An orthopedic bone anchor device is disclosed that includes, in one embodiment, a receiver member, an anchor member and a retaining member. The retaining member may retain the anchor member at least partially in the receiver member. In certain embodiments, the anchor member may have a groove in a head for accommodating part of the retaining member, and/or a multiple lead thread.
    Type: Grant
    Filed: February 15, 2006
    Date of Patent: June 3, 2014
    Assignee: Warsaw, Orthopedic, Inc.
    Inventor: Alan Rezach
  • Patent number: 8702759
    Abstract: A bone anchor assembly may include a fixation member securable to a bone, a coupling member, a compressible member and a locking member. The fixation member may be formed monolithically with the coupling member, and the coupling member may have a loop portion shaped to receive the compressible member. The compressible member may comprise a compressible sphere with a bore extending therethrough, the bore shaped to receive an elongated member. The locking member may be actuable through an aperture in the coupling member to urge compression of the compressible member to lock the elongated member in a fixed position. The compressible member may be polyaxially adjustable relative to the coupling member.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: April 22, 2014
    Assignee: Gmedelaware 2 LLC
    Inventor: Daniel J. Triplett
  • Patent number: 8696718
    Abstract: A polyaxial screw assembly includes a pedicle screw, a coupling, an insert, and a housing. The pedicle screw includes a shank having a helical thread formed thereon and a head at one end. The coupling is positioned on top the pedicle screw and releasably engages portions of the head. The coupling and pedicle screw are positioned within a distal portion of the housing. The pedicle screw is slid through an opening in the insert and the insert is thread into the distal portion of the housing to retain the coupling and the pedicle screw within the housing. The pedicle screw is rotatable and pivotable relative to the housing. Compressing the coupling within the housing locks the pedicle screw in a desired orientation.
    Type: Grant
    Filed: January 18, 2013
    Date of Patent: April 15, 2014
    Assignee: K2M, Inc.
    Inventors: Michael Barrus, Scott Jones
  • Patent number: 8685064
    Abstract: A polyaxial bone anchor including a housing and a bone screw. A bottom surface of the housing includes an aperture that defines an angulation limit of the bone screw for each azimuthal angle around a longitudinal axis of the housing. The aperture is V-shaped, with the V-shape having converging side walls that define a low-angulation direction near their intersection and a high-angulation direction opposite the low-angulation direction. In some cases, the angulation limit of the bone screw is generally constant over a range of azimuthal angles centered around the high-angulation direction. The housing may be modular, including tabs on one component that are plastically deformed to engage a lip on another component. During assembly, a mandrel advances longitudinally along a bore in the housing, and forces the tabs radially outward toward the lip to a radially outward plastically deformed state.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: April 1, 2014
    Assignee: Zimmer Spine, Inc.
    Inventors: Hugh D. Hestad, Jack A. Dant, Eric J. Lundequam, Eric P. Jerke, Deborah L. Hoch
  • Patent number: 8663290
    Abstract: The fastening system consists of the polyaxial ball and socket joint used in conjunction with a bone screw having threads on one end for use in anchoring to the spine and a spherical connector on the other end operating as a pivot point about which a connecting assembly moves in a polyaxial fashion. A substantially U-shaped connecting assembly has a lower receptacle that operates as a socket for housing a retainer ring within a retaining ring groove. The retaining ring cooperates with the connector assembly and a saddle that is positioned atop the spherical connector.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: March 4, 2014
    Assignee: Ortho Innovations, LLC
    Inventors: Robert L. Doubler, John E. Hammill, Sr.
  • Patent number: 8663291
    Abstract: The fastening system consists of the polyaxial ball and socket joint used in conjunction with a bone screw having threads on one end for use in anchoring to the spine and a spherical connector on the other end operating as a pivot point about which a connecting assembly moves in a polyaxial fashion. A substantially U-shaped connecting assembly has a lower receptacle that operates as a socket for housing a retainer ring within a retaining ring groove.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: March 4, 2014
    Assignee: Ortho Innovations, LLC
    Inventors: Robert L. Doubler, John E. Hammill, Sr.
  • Patent number: 8636777
    Abstract: A polyaxial bone screw assembly includes a threaded shank body having an upper capture structure, a head and an open, compressible retainer collar. The capture structure and retainer collar are both threaded for rotatable attachment within a cavity of the head. The head has a U-shaped cradle defining a channel for receiving a spinal fixation rod. The head channel communicates with the cavity and further with a restrictive opening that allows for loading the capture structure into the head but prevents passage of the attached retainer collar out of the head. The open retainer collar may be bottom- or top-loaded by compressing open ends of the ring towards each other, the collar springing back into a rounded shape after insertion in the head. The open collar has an external substantially spherical surface that mates with an internal surface of the head, providing a ball joint, enabling the head to be disposed at an angle relative to the shank body.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: January 28, 2014
    Inventor: Roger P. Jackson
  • Patent number: 8636737
    Abstract: A system and associated method are provided for mechanically fixating a region of a skull to a portion of a spine. A plate is provided to contact a region of a skull and be secured thereto. A spinal rod is configured to extend from a location adjacent the plate to a location adjacent at least one vertebra. An adjustable housing is provided to secure the rod to the plate, and has a first position wherein the relative position of the rod to the plate can be adjusted and a second position wherein the relative position of the rod to the plate is secured.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: January 28, 2014
    Assignee: Zimmer Spine, Inc.
    Inventor: Jeremy Lemoine
  • Patent number: 8617217
    Abstract: The present invention generally is directed toward a spinal fixation system whereby a coupling element allows the physician to selectively lock or unlock either the connection between the coupling element and a fastener, such as to allow for repositioning of the coupling element, or the connection between the coupling element and an elongate rod. The locking or unlocking of these connections may be made independently and as desired by the physician.
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: December 31, 2013
    Assignee: Globus Medical, Inc.
    Inventors: Andrew Iott, Andrew Lee, Larry Blader, David C. Paul
  • Patent number: 8556938
    Abstract: A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The upper portion expands a retaining member in the receiver cavity to capture the shank upper portion in the receiver. In some embodiment either the retaining member or an insert provide for a friction fit of the shank upper portion in the receiver resulting in non-floppy placement of the shank with respect to the receiver. Some retainers and inserts have a lock-and-release feature. Final locking of the polyaxial mechanism is provided by frictional engagement between the shank upper portion and the retaining member. A pre-assembled receiver, retaining member and optional insert may be popped-on or snapped-on to the shank upper portion prior to or after implantation of the shank into a vertebra.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: October 15, 2013
    Inventors: Roger P. Jackson, James L. Surber
  • Publication number: 20130253588
    Abstract: A spinal fixation device may include a bone anchoring member, a rod receiver, and an connection member. The rod receiver may include a channel for receiving a rod projection from a first adjacent fixation assembly. The rod receiver may have a central axis such that the channel is generally perpendicular to the central axis. The connection member may have a rod projection configured to extend to a second adjacent fixation assembly. The rod receiver may be coupled to the connection member and rotatable about the central axis of the rod receiver. The interior fixation assembly may be axially fixed such that the bone anchoring member, the rod receiver and the connection member are not translatably movable relative to each other.
    Type: Application
    Filed: March 21, 2012
    Publication date: September 26, 2013
    Applicant: WASAW ORTHOPEDIC, INC.
    Inventors: Vincent C. Traynelis, Gregory Marik, Bradley Coates
  • Patent number: 8529604
    Abstract: A bottom-loading multi-axial bone anchor apparatus is disclosed. The apparatus includes a receiver member, a crown member, a bone anchor and a retaining member. The receiver member defines an upper opening and a lower opening, which may form part of the same opening, a channel, and a groove. The crown member and bone anchor are loaded into the lower opening of the receiver member, and the retaining member fits around the bone anchor and into the groove in the receiver member. The bone anchor is capable of multi-axial positioning with respect to the receiver member. An elongated member is placed in the channel of the receiver member, contacting the crown member, and a compression member is applied via the upper opening. The compression member presses down on the elongated member, which presses down on the crown member and locks the bone anchor between the crown member and the retaining member.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: September 10, 2013
    Assignee: Warsaw Orthopedic, Inc.
    Inventors: B Thomas Barker, Jr., John Stewart Young, Craig M Squires, David L Brumfield, Christopher E Johnson, Dennis J Buchanan
  • Patent number: 8506610
    Abstract: A receiving part for receiving a rod for coupling the rod to a bone anchoring element, the receiving part including: a receiving part body including a rod receiving portion with a channel for receiving a rod, and a head receiving portion for accommodating a head of a bone anchoring element, the head receiving portion having an open end and being flexible for inserting and clamping of the head; a locking ring around the head receiving portion to exert a first force onto the head receiving portion to lock the head therein; and a pre-locking ring separate from the locking ring and around the head receiving portion to exert a second force less than the first force onto the head receiving portion to clamp the head in a temporary pre-locking position.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: August 13, 2013
    Assignee: Bierdermann Technologies GmbH & Co. KG
    Inventors: Lutz Biedermann, Wilfried Matthis, Berthold Dannecker
  • Patent number: 8491641
    Abstract: The present invention may include a pedicle screw with a multifunctional adaptor, a strain reliever, and a dual-surface cap. The multifunctional adaptor may include a convex pivot ring for improving multi-axial movement and locking stability, an integrated locking mechanism for improving maneuverability, and an integrated compression member for improving the assembly process. The strain reliever may be formed along a neck of the pedicle screw for relieving mechanical stress asserted thereto, and thereby preventing a breakage thereof. The dual-surface cap may provide a slightly sloped surface for reducing the tension of the stabilizing rod. The present invention may also provide for a dynamic adaptor for flexibly connecting two stabilizing rods, which may be versatilely adapted to various pedicle screw configurations.
    Type: Grant
    Filed: September 28, 2010
    Date of Patent: July 23, 2013
    Assignee: Spinofix, Inc.
    Inventor: Raj Nihalani
  • Patent number: 8475501
    Abstract: A polyaxial bone screw includes a head member and a shank member. The shank has a capture end and an opposite threaded end for threaded insertion into a vertebra. The head has a U-shaped cradle for receiving a spinal fixation rod and a central bore for receiving the capture end of the shank. An expandible retainer ring with a radial split is snapped onto the capture end of the shank to retain it within the head. The retainer ring has a spherical outer surface which forms a ball joint with a spherical socket cavity within the head to enable the head to be angled relative to the shank. A threaded closure plug is tightened within the cradle to clamp the rod into engagement with a knurled dome on the capture end of the shank to secure the rod relative to the vertebra.
    Type: Grant
    Filed: July 31, 2012
    Date of Patent: July 2, 2013
    Inventor: Roger P. Jackson
  • Publication number: 20130150893
    Abstract: A spinal fixation assembly and capless multi-axial screw system and method are shown. The assembly comprises a receiver having a rotary lock which in one embodiment includes a plurality of channels which urge and lock the elongated member to the screw using a bayonet type connection.
    Type: Application
    Filed: February 6, 2013
    Publication date: June 13, 2013
    Applicant: X-spine Systems, Inc.
    Inventor: David Louis Kirschman
  • Patent number: 8449578
    Abstract: The present teachings provide one or more surgical implements for repairing damaged tissue, such as in the case of a spinal fixation procedure. A multiplanar bone anchor system for a fixation procedure is provided. The system can include a bone fastener. The bone fastener can include a head and a second end adapted to engage an anatomy. The bone fastener can extend along a longitudinal axis. The system can also include a coupling arrangement coupled to the head of the bone fastener so that the bone fastener is rotatable about the longitudinal axis to define a first plane of motion. The system can further include a saddle, which can be coupled to the coupling arrangement. The saddle can be movable relative to at least one of the bone fastener and the coupling arrangement to define a second plane of motion.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: May 28, 2013
    Assignee: EBI, LLC
    Inventors: Matthew L. Keiser, Laurie G. Sanders, Christopher Shaffrey
  • Patent number: 8430914
    Abstract: An assembly for connecting a support element to a bone. The assembly comprises: a bone screw having a head at one end of a threaded shaft; and a clamp comprising: a base at a first end of the clamp delimiting an opening for receiving the head of the bone screw; and at least two side members extending from the base towards a second end of the clamp. The head of the bone screw and the clamp are configured to allow the head of the bone screw to be inserted into the base from the direction of the first end at a first orientation of the base to the bone screw, and to retain an inserted bone screw within the base at a second orientation of the base relative to the bone screw. This allows the screw to be inserted into the bone without requiring prior assembly of the screw and clamp. It also allows later revision whereby the clamp can be removed from the screw without requiring an implanted screw to be removed from the bone.
    Type: Grant
    Filed: October 24, 2008
    Date of Patent: April 30, 2013
    Assignee: DePuy Spine, Inc.
    Inventors: Frank Spratt, Martin Pfleiderer
  • Patent number: 8409256
    Abstract: A spine stabilization system having a dynamic screw comprises at least one bone anchor assembly comprising a receiver member and a bone engaging member pivotably connected to the receiver member. A bearing is provided in the receiver member that engages a portion of the bone engaging member. An elongated connecting member is connected to the receiver member. A retention member insert is provided within the receiver member between the elongated connecting member and the bearing. The retention member is configured to secure the bearing within the retention member.
    Type: Grant
    Filed: December 28, 2006
    Date of Patent: April 2, 2013
    Assignee: DePuy Spine, Inc.
    Inventors: Benjamin Arnold, Charles M. Bartish, Jr., Seungkyu Daniel Kwak, William L. Dunbar, Jr., John Riley Hawkins, Amie Borgstrom, Erasmo A. López, Anwar M. Upal, Missoum Moumene
  • Patent number: 8403971
    Abstract: A polyaxial screw assembly includes a pedicle screw, a coupling, an insert, and a housing. The pedicle screw includes a shank having a helical thread formed thereon and a head at one end. The coupling is positioned on top the pedicle screw and releasably engages portions of the head. The coupling and pedicle screw are positioned within a distal portion of the housing. The pedicle screw is slid through an opening in the insert and the insert is thread into the distal portion of the housing to retain the coupling and the pedicle screw within the housing. The pedicle screw is rotatable and pivotable relative to the housing. Compressing the coupling within the housing locks the pedicle screw in a desired orientation.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: March 26, 2013
    Assignee: K2M, Inc.
    Inventors: Michael Barrus, Scott Jones
  • Patent number: 8377102
    Abstract: A medical implant assembly includes a polyaxial bone anchor having a shank with an upper portion, a receiver, a retainer for holding the shank upper portion in the receiver, a lower compression insert with surfaces for closely receiving an elongate connecting member and a closure structure that may independently engage the lower compression insert to lock the shank with respect to the receiver while selectively not locking the elongate member. Projections or splines of the shank upper portion mate with holding pockets on the retainer. The bone anchor includes a shank upper surface exclusively engaging the lower compression insert that is spaced from the retainer, the retainer and shank being configured for polyaxial motion with respect to the receiver prior to locking.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: February 19, 2013
    Inventor: Roger P. Jackson
  • Patent number: 8366753
    Abstract: A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in a receiver and retained within the receiver by a retaining structure in the form of an open ring. The receiver has a U-shaped channel for receiving a spinal fixation rod. The shank upper portion is designed to directly frictionally engage the spinal fixation rod when a closure structure operably urges the rod toward the upper portion, fixing the bone screw shank body in a selected angular orientation with respect to the receiver.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: February 5, 2013
    Inventor: Roger P. Jackson
  • Patent number: 8361125
    Abstract: System and methods are provided that include a plate member engageable to the spinal column with an anchor assembly. The anchor assembly includes a coupling member having a post extending through at least one opening of the plate member and an anchor member pivotally captured in a receiver member of the coupling member below a lower surface of the plate member. A locking member secures the plate member to the coupling member.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: January 29, 2013
    Assignee: Warsaw Orthopedic, Inc.
    Inventors: Harold S Taylor, Terrance W Strohkirch, Jr., Matthew M Morrison, Michael S Veldman
  • Publication number: 20120330363
    Abstract: A fastener assembly including an existing polyaxial pedicle screw that has been previously installed in a spinal structure, the polyaxial pedicle screw including a polyaxial head to which a prosthetic member is secured, a fastening portion fastened to the polyaxial head over the prosthetic member, and a connector element that extends from the fastening portion, the connector element being connected to another spinal structure.
    Type: Application
    Filed: September 4, 2012
    Publication date: December 27, 2012
    Inventors: Assaf Klein, Eyal Zilberberg
  • Patent number: 8298275
    Abstract: A bone anchor assembly is provided, which may be used in cervical, thoracic, lumbar or sacral areas of the spine or other orthopedic locations. The anchor assembly includes a bone anchor, a receiver mounted to the bone anchor, a saddle within the receiver, a spacer within the receiver, and an engaging member. The receiver extends along a central longitudinal axis proximally away from the bone anchor. A rod or other elongated connecting element is received in a passage of the receiver in contact with the saddle, and the engaging member engages the connecting element against the saddle, which engages the saddle against the spacer, which in turn engages the proximal head of the bone anchor in the receiver. The orientation of the saddle in the receiver is adjustable to correspond to the orientation of the connecting element relative to the central longitudinal axis of the receiver.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: October 30, 2012
    Assignee: Warsaw Orthopedic, Inc.
    Inventor: William Alan Rezach
  • Patent number: 8277490
    Abstract: A novel surgical screw is presented as a polyaxial, multiaxial, or monoaxial screw. The polyaxial screw allows versatile angulation between a bone anchor section and a screw body and allows the surgeon to attach a rod to the invention in a top-loading manner and manipulate the rod to accommodate a patient's body and the surgical goals. The screw uses a rod saddle to seat a rod, and permits the surgeon to sagitally manipulate the rod. After implantation of the screw and insertion of the rod, a locking screw is used to fix the angle and position of the rod and screw body.
    Type: Grant
    Filed: March 1, 2010
    Date of Patent: October 2, 2012
    Assignee: University of South Florida
    Inventors: Thomas B. Freeman, Wesley M. Johnson
  • Patent number: 8267969
    Abstract: Methods, systems, devices and tools for placing bone stabilization components in a patient are provided. The systems and devices have a reduced number of discrete components that allow placement through small incisions and tubes. More particularly, the present invention is directed to screws for use in systems and methods of treating the spine, which eliminate pain and enable spinal motion, which effectively mimics that of a normally functioning spine. Methods are also provided for installation of the screw and other subject systems.
    Type: Grant
    Filed: March 20, 2007
    Date of Patent: September 18, 2012
    Assignee: Exactech, Inc.
    Inventors: Moti Altarac, Stanley Kyle Hayes, Joey Camia Reglos, Daniel H. Kim, J. Christopher Flaherty
  • Patent number: 8241333
    Abstract: A polyaxial bone screw includes a head member and a shank member. The shank has a capture end and an opposite threaded end for threaded insertion into a vertebra. The head has a U-shaped cradle for receiving a spinal fixation rod and a central bore for receiving the capture end of the shank. An expandable retainer ring with a radial split is snapped onto the capture end of the shank to retain it within the head. The retainer ring has a spherical outer surface which forms a ball joint with a spherical socket cavity within the head to enable the head to be angled relative to the shank. A threaded closure plug is tightened within the cradle to clamp the rod into engagement with a knurled dome on the capture end of the shank to secure the rod relative to the vertebra.
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: August 14, 2012
    Inventor: Roger P. Jackson
  • Patent number: 8221470
    Abstract: A fastener assembly for a spinal fixation system that is particularly useful in treatment of pediatric and small-statured patients includes a fastener, an attachment member, and a locking member. The fastener has a lower portion for contacting a bone and an upper portion integral with the lower portion. The upper portion has two open channels. Each channel is configured and dimensioned to receive a portion of a longitudinal or connecting member along its circumference. The attachment member is positionable on the fastener and at least partially covers the channel that receives the longitudinal or connecting member. The locking member is operatively associated with the upper portion of the fastener and secures the attachment member and the longitudinal or connecting member to the fastener.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: July 17, 2012
    Assignee: Synthes USA, LLC
    Inventors: Kris G. Kumar, Balaji S. Ramamurti, Barclay R. Davis, Thomas J. Runco
  • Patent number: 8197518
    Abstract: A thread-thru polyaxial pedicle screw fastening system. The fastening system consists of an anchoring bone screw having threads on one end for use in anchoring to the screw to the spine and a spherical connector on the other end operating as a pivot point about which a U-shaped connecting assembly moves in a polyaxial fashion. The U-shaped connecting assembly, for receipt of a spinal connecting rod, has a biased retainer ring for maintaining a positive tension between the connecting assembly and the anchored screw. The system allows for an improved manufacturing step wherein the threaded shank of a bone screws can be passed through a lower portion of the connecting assembly allowing a variety of bone screw sizes to be used with a common sized connector.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: June 12, 2012
    Assignee: Ortho Innovations, LLC
    Inventors: John E. Hammill, Sr., Robert L. Doubler
  • Patent number: 8162991
    Abstract: Provided is a novel multi-planar taper lock screw for connecting a connecting rod to bone. The screw is capable of multi-directional articulation while the connecting rod position can remain stable and aligned as needed. After the screw had been articulated and properly positioned, it can be locked such that the screw and the connecting rod will remain in relative position to the bone. The screw is configured for easy insertion and connection as well as easy removal and disconnection from the connecting rod. Also provided is a system for fixing two or more bones or bone fragments and a kit for fixing bones or bone fragments. A method of fixing bones or bone fragments is also provided.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: April 24, 2012
    Assignee: K2M, Inc.
    Inventors: Kevin R. Strauss, Michael Barrus, Scott A. Jones
  • Patent number: 8142481
    Abstract: The pedicle screw system may be used for fixation of spinal segments and may be advantageous when minimally invasive surgery (MIS) techniques are employed. The pedicle screw system includes a tulip assembly comprising of a tulip body, an inner member, and an expansion member. Installation of the pedicle screw system into pedicles of the spine, for example, includes inserting the pedicle screw into a portion of the spine and then coupling the tulip assembly to the pedicle screw. The tulip assembly may be locked onto the pedicle screw before a distraction rod is placed in the tulip assembly. After the rod is placed in the tulip assembly, the tulip body and the inner member can be rotated relative to one another to lock the rod into the tulip assembly. In addition, the relative rotation may also provide additional locking of the tulip assembly to the pedicle screw.
    Type: Grant
    Filed: January 21, 2010
    Date of Patent: March 27, 2012
    Assignee: X-spine Systems, Inc.
    Inventor: David R. Warnick
  • Patent number: 8133262
    Abstract: Bone anchor assemblies having a large diameter for fixing a spinal connection element to bone and methods of assembly are described. The assembly includes a receiver member for receiving the spinal connection element, a bone-engaging shank for engaging bone, a retaining member for retaining the head of the shank within the receiver member and a locking member for locking the retaining member within the receiver member.
    Type: Grant
    Filed: April 27, 2007
    Date of Patent: March 13, 2012
    Assignee: DePuy Spine, Inc.
    Inventor: Dale E. Whipple