Source: http://www.google.com/patents/US20060149244?dq=1886562
Timestamp: 2014-07-23 11:06:26
Document Index: 333673494

Matched Legal Cases: ['art 52', 'art 53', 'art 52', 'art 52', 'art 53', 'art 52', 'art 53', 'art 52', 'art 52', 'art 52', 'art 53', 'art 53']

Patent US20060149244 - Device for connecting a longitudinal bar to a pedicle screw - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA device for connecting a longitudinal bar to a pedicle screw for fixation of the spine includes a body having an axis, an upper end, a lower end, a hole coaxial with the axis, and a through hole positioned perpendicular to the axis. The device also includes a collet chuck slidably disposed within the...http://www.google.com/patents/US20060149244?utm_source=gb-gplus-sharePatent US20060149244 - Device for connecting a longitudinal bar to a pedicle screwAdvanced Patent SearchPublication numberUS20060149244 A1Publication typeApplicationApplication numberUS 11/347,548Publication dateJul 6, 2006Filing dateFeb 2, 2006Priority dateJan 22, 1997Also published asDE59712497D1, EP0954247A1, EP0954247B1, US6371957, US7022122, US20030023240, WO1998032386A1Publication number11347548, 347548, US 2006/0149244 A1, US 2006/149244 A1, US 20060149244 A1, US 20060149244A1, US 2006149244 A1, US 2006149244A1, US-A1-20060149244, US-A1-2006149244, US2006/0149244A1, US2006/149244A1, US20060149244 A1, US20060149244A1, US2006149244 A1, US2006149244A1InventorsThomas Amrein, Martin HessOriginal AssigneeSynthes (Usa)Export CitationBiBTeX, EndNote, RefManReferenced by (19), Classifications (12), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetDevice for connecting a longitudinal bar to a pedicle screwUS 20060149244 A1Abstract A device for connecting a longitudinal bar to a pedicle screw for fixation of the spine includes a body having an axis, an upper end, a lower end, a hole coaxial with the axis, and a through hole positioned perpendicular to the axis. The device also includes a collet chuck slidably disposed within the hole. The collet chuck includes a through hole substantially aligned with the through hole of the body for receiving the longitudinal bar. The collet chuck also includes a chamber defined by elastic tongues for receiving the head of the pedicle screw. Images(9) Claims(22)
BRIEF DESCRIPTION OF THE DRAWINGS The detailed description will be better understood in conjunction with the accompanying drawings, in which like reference characters represent like elements, as follows: FIG. 1 is an exploded perspective view of the device with a longitudinal bar, a pedicle screw with a spherical head, and a set screw; FIG. 2 shows a slotted longitudinal section through the device as shown in the plane of FIG. 1; FIG. 3 is a perspective view of the device of FIG. 1 in the mounted state after locking the longitudinal bar and the pedicle screw by means of the set screw; FIG. 4 is an exploded perspective view of another embodiment of the device shown in FIG. 1 with an adjusting nut and a divided bushing; FIG. 5 is an exploded perspective view of another embodiment of the device shown in FIG. 4 with a channel on the collet chuck that is open at the top and with a securing pin; FIG. 6 is an exploded perspective view of another embodiment of the device shown in FIG. 1 with an adjusting nut for securing the spherical head of the pedicle screw and a set screw for locking the longitudinal bar; FIG. 7 shows a longitudinal section through another embodiment of the device illustrated in FIG. 6 with a set screw integrated into a locking screw; FIG. 8 is an exploded perspective view of another embodiment of the device shown in FIG. 5 with a collet chuck that is open at the side to accommodate the longitudinal bar and an adjusting nut as a chucking means for locking the longitudinal bar while at the same time securing the spherical head of the pedicle screw; FIG. 9 is an exploded perspective view of the device shown in FIG. 5 without a securing pin; FIG. 10 is an exploded perspective view of another embodiment of the device shown in FIG. 5 with a set screw and an inside thread in the collet chuck; FIG. 11 is an exploded perspective view of another embodiment of the device shown in FIG. 8 with an adjusting nut for securing the spherical head of the pedicle screw and with a set screw for locking the longitudinal bar; FIG. 12 is an exploded perspective view of another embodiment of the device shown in FIG. 11 with a collet chuck that is open at the top; FIG. 13 is an exploded perspective view of another embodiment of the device shown in FIG. 11 with a through hole in the bushing which is open at the side; and FIG. 14 is an exploded perspective view of another embodiment of the device shown in FIG. 12 with a through hole in the bushing which is open at the top. DETAILED DESCRIPTION OF THE INVENTION The device according to the invention illustrated in FIGS. 1 and 2 generally includes a body 3 in the form of a hollow cylindrical bushing with an axis 4 (axis of the hollow cylinder) and a hollow cylindrical collet chuck 7 arranged coaxially so it can slide in the interior of body 3. Body 3 has a through hole 6 running across axis 4 that intersects the cylindrical surface of the hollow cylinder at two points symmetrically with axis 4. Collet chuck 7 also has a through hole 17 running across axis 4. Insertion of a longitudinal bar 1 running across axis 4 is made possible by the aligned arrangement of through holes 6 and 17 as illustrated in FIG. 2. In its upper part, collet chuck 7 is secured within (hollow cylindrical) body 3 by a press fit and can be displaced axially with respect to body 3 when the relatively high force of the press fit is overcome. Hollow cylindrical body 3 and collet chuck 7 are preferably in a rotationally locked arrangement relative to one another, e.g., by means of suitable groove/channel guides running axially. Collet chuck 7 is designed with tongues 8 that are spring mounted against cylinder axis 4 and point downward. The spherical head 9 of a pedicle screw 2 can be snapped from below with a spring action into the chamber formed by these tongues. A hole 10 with an inside thread 11 is provided in the upper part of collet chuck 7 to accommodate a set screw 12 with a hexagonal socket head 20 which can exert a force on a longitudinal bar 1 inserted into the device, so the longitudinal bar 1 is locked axially and rotationally with respect to body 3, as indicated in FIG. 3. Collet chuck 7 is designed at its lower end such that screw shaft 13 of pedicle screw 2 connected to spherical head 9 can be locked at an angle α of −25� to +25� with respect to axis 4. At its lower end 24, body 3 has a conical inside surface 14 which becomes wider toward the lower end and can come into sliding contact with a suitably designed conical outside surface 18 of the free ends of tongues 8 of collet chuck 7. As soon as set screw 12 abuts against longitudinal bar 1 inserted into the device, collet chuck 7 begins to push upward against body 3. This process is illustrated in FIG. 2, where the left half of the FIG. shows the condition before pushing collet chuck 7 upward, and the right half shows the conical surfaces 14 and 18 slipping past one another as collet chuck 7 is pushed upward with tongues 8. Tongues 8 are designed with a spring action due to slot 22 being pushed toward cylinder axis 4 such that hollow spherical cavity 19 is reduced in size and head 9 of pedicle screw 2 inserted into it is gripped securely. To optimize the locking of head 9, it is provided with a structuring 15, preferably in the form of transverse grooves or transverse ribs. Otherwise, pedicle screw 2 corresponds to known screw designs and is expediently provided with a hexagonal socket head 16. Hollow spherical cavity 19 may in turn be provided with a structuring 21, preferably in the form of transverse grooves or transverse ribs. A combination of structuring 21 and structuring 15 is possible to further improve the fixation effect of head 9 in hollow spherical cavity 19. Hollow spherical cavity 19 is preferably designed with a shape complementary to that of head 9 of pedicle screw 2 so the head can be accommodated in the cavity. The embodiment of the device shown in FIG. 4 illustrates the use of a body 3, which is divided into a bottom part 52 and a top part 53 across axis 4 in the middle of through hole 6, in combination with an adjusting nut 26. The bottom part 52 of body 3 should be tall enough that longitudinal bar 1 is always in contact with bottom part 52. Collet chuck 71 differs from collet chuck 7 shown in FIG. 1 only in that the inside thread 11 on the upper end has been replaced by an outside thread 27 for use by an adjusting nut 26. When tightened, adjusting nut 26 presses on top part 53 of body 3, which subsequently presses directly on longitudinal bar 1. Longitudinal bar 1 is subsequently pressed against bottom part 52 of body 3, and then locks spherical head 9, as shown in FIG. 2. The embodiment of the device shown in FIG. 5 differs from the embodiment illustrated in FIG. 9 only in that a peg 55 prevents collet chuck 72, which has been weakened by channel 54, from collapsing when adjusting nut 26 is tightened. To prevent this peg 55 from falling out, it is advantageously provided with an outside thread and screwed in. The embodiment of the device shown in FIG. 6 differs from the embodiment illustrated in FIG. 4 only in that: a) collet chuck 73 has an inside thread 11 in addition to outside thread 27, and b) body 3 (which is one piece) and through hole 6 are positioned with respect to through hole 17 so that only spherical head 9 is locked when adjusting nut 26 is tightened. This permits distraction or compression with a stable angular position. Adjusting nut 26 presses on body 3, and the resulting bracing of body 3 with collet chuck 73 ensures fixation of spherical head 9 of pedicle screw 2 without locking longitudinal bar 1. Longitudinal bar 1 is pressed separately with the help of set screw 12 against the lower edge of through hole 6 of body 3. Therefore, body 3 is further wedged with collet chuck 73, which leads to a greater clamping effect on spherical head 9. Through hole 6 should be positioned in body 3 so that longitudinal bar 1 also rests on the lower edge of through hole 6 after tightening adjusting nut 26. The embodiment of the device illustrated in FIG. 7 differs from the device illustrated in FIGS. 1-3 only in the design of locking screw 91 and the positioning of through hole 6 with respect to through hole 17. Collet chuck 7 is provided with an inside thread 11. A locking screw 91, which is screwed into inside thread 11, and a set screw 12, which is integrated into locking screw 91, serve to lock spherical head 9 and longitudinal bar 1. Body 3, which is designed in one piece by analogy with FIGS. 1-3, is provided with a turning 94 at the top, accommodating the shoulder 93 of locking screw 91. Through hole 6 is positioned in body 3 with respect to through hole 17 in collet chuck 7 in such a way that only spherical head 9 is locked when locking screw 91 is tightened. Longitudinal bar 1 is secured afterwards by means of set screw 12. As long as this set screw 12 is screwed completely into locking screw 91, and locking screw 91 has been screwed back to the extent that longitudinal bar 1 touches the lower edge of through hole 6 in body 3, spherical head 9 can be secured or removed. Furthermore, collet chuck 7 is released again from the tightened state when locking screw 91 is screwed back. To accommodate longitudinal bar 1, collet chuck 7 may be provided with a through hole 17 according to FIG. 4, with a channel 54 that is open at the top according to FIG. 9, or with a channel 42 which is open at the side according to FIG. 8. In these latter two cases, either a two-piece design of body 3 or a design according to FIGS. 11 and 12 is advantageous to facilitate insertion of the longitudinal bar. However, with the two-piece design, the two parts of body 3 must be designed so that top part 53 presses directly on bottom part 52 and not on longitudinal bar 1 even after bracing. The embodiment of the device shown in FIG. 8 differs from the embodiment illustrated in FIG. 4 only in that, in contrast with collet chuck 71, collet chuck 74 has a channel 42 that is open at the side instead of having a through hole 17 to accommodate longitudinal bar 1, but slot 22 does not extend into this open channel. The embodiment of the device shown in FIG. 9 differs from the embodiment illustrated in FIG. 4 only in that, in contrast with collet chuck 71, collet chuck 72 has a channel 54 that is open at the top instead of having a through hole 17 to accommodate longitudinal bar 1, and slot 22 does not extend into this open channel. To prevent collet chuck 72 from collapsing when adjusting nut 26 is tightened, the thread should be designed so that negligible radial forces occur in tightening. A sawtooth thread, for example, would meet this requirement. The embodiment of the device shown in FIG. 10 illustrates the use of a collet chuck 75, which is provided with an inside thread 11 instead of an outside thread 27, in contrast with collet chuck 72 illustrated in FIGS. 5 and 9. A set screw 56 with an outside thread 57 and a flange 58 serves as the clamping means. When tightened, set screw 56 presses against longitudinal bar 1, which in turn presses on bottom part 52 of body 3. This bracing of bottom part 52 and collet chuck 75 locks spherical head 9 of pedicle screw 2, as illustrated in FIG. 2. Top part 53 of body 3 prevents widening of collet chuck 75 when set screw 56 is tightened. Top part 53 rests on shoulder 63. The embodiment of the device shown in FIG. 11 differs from the embodiment illustrated in FIG. 6 only in that collet chuck 76, in contrast with collet chuck 73, has a channel 42 that is open at the side instead of having a through hole 17, and slots 22 do not extend into the channel. According to FIG. 13, through hole 6 in body 3 is preferably open at side 80 to permit unhindered insertion of longitudinal bar 1. The embodiment of the device shown in FIG. 12 differs from the embodiment illustrated in FIG. 11 only in that, in contrast with collet chuck 76, collet chuck 77 has a channel 54 that is open at the top to accommodate longitudinal bar 1. According to FIG. 14, through hole 6 in body 3 is open toward top 81 for unhindered insertion of longitudinal bar 1. The embodiment of the device shown in FIG. 13 differs from the embodiment illustrated in FIG. 11 only in that a through hole 80 which is open at the side is provided in body 3. The embodiment of the device shown in FIG. 14 differs from the embodiment illustrated in FIG. 12 only in that a through hole 81 which is open at the top is provided in body 3. Referenced byCiting PatentFiling datePublication dateApplicantTitleUS7828829Mar 22, 2007Nov 9, 2010Pioneer Surgical Technology Inc.Low top bone fixation system and method for using the sameUS8118837Jul 3, 2008Feb 21, 2012Zimmer Spine, Inc.Tapered-lock spinal rod connectors and methods for useUS8137384Sep 2, 2008Mar 20, 2012Bhdl Holdings, LlcModular pedicle screw systemUS8167914Jul 16, 2008May 1, 2012Zimmer Spine, Inc.Locking insert for spine stabilization and method of useUS8197512 *Jul 16, 2008Jun 12, 2012Zimmer Spine, Inc.System and method for spine stabilization using resilient insertsUS8252030Mar 10, 2009Aug 28, 2012Globus Medical, Inc.Spinal implant connection assemblyUS8343199 *Sep 2, 2010Jan 1, 2013Extremity Medical, LlcIntramedullary fixation screw, a fixation system, and method of fixation of the subtalar jointUS8398683Oct 23, 2008Mar 19, 2013Pioneer Surgical Technology, Inc.Rod coupling assembly and methods for bone fixationUS8430913 *Jun 10, 2010Apr 30, 2013Spine Wave, Inc.Devices and methods for adding an additional level of fixation to an existing constructUS8628559Jul 26, 2012Jan 14, 2014Globus Medical, Inc.Spinal implant connection assemblyUS8758410Feb 15, 2012Jun 24, 2014Bhdl Holdings, LlcModular pedicle screw systemUS8758413Dec 8, 2011Jun 24, 2014Bhdl Holdings, LlcMethod for selecting and installing a dynamic pedicle screwUS20100094346 *Oct 7, 2009Apr 15, 2010Total Connect Spine, LlcSpinal connection assemblyUS20100318131 *Jun 10, 2010Dec 16, 2010Spine Wave, Inc.Devices and Methods for Adding an Additional Level of Fixation to an Existing ConstructUS20110125153 *Jun 18, 2010May 26, 2011Jeff TyberIntramedullary fixation assembly and method of useUS20110213367 *Sep 2, 2010Sep 1, 2011Jeff TyberIntramedullary fixation screw, a fixation system, and method of fixation of the subtalar jointUS20110213424 *Aug 12, 2010Sep 1, 2011Lutz Biedermannreceiving part for receiving a rod for coupling the rod to a bone anchoring elementUS20120179209 *Dec 12, 2011Jul 12, 2012Lutz BiedermannReceiving part for receiving a rod for coupling the rod to a bone anchoring element and a bone anchoring deviceWO2010027967A1 *Sep 1, 2009Mar 11, 2010Bhdl Holdings, LlcModular pedicle screw system* Cited by examinerClassifications U.S. Classification606/264, 606/278, 606/266International ClassificationA61B17/58, A61B17/70, A61F2/30Cooperative ClassificationA61B17/7037, A61B17/7034, A61B17/7032European ClassificationA61B17/70B2, A61B17/70B2L, A61B17/70B5BLegal EventsDateCodeEventDescriptionMay 6, 2013ASAssignmentOwner name: DEPUY SPINE, LLC, MASSACHUSETTSFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SYNTHES USA, LLC;REEL/FRAME:030358/0945Effective date: 20121230Free format text: CHANGE OF NAME;ASSIGNOR:HAND INNOVATIONS LLC;REEL/FRAME:030359/0036Effective date: 20121231Owner name: DEPUY SYNTHES PRODUCTS, LLC, MASSACHUSETTSFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:DEPUY SPINE, LLC;REEL/FRAME:030359/0001Owner name: HAND INNOVATIONS LLC, FLORIDAJun 12, 2009ASAssignmentOwner name: SYNTHES USA, LLC, PENNSYLVANIAFree format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);REEL/FRAME:022826/0140Effective date: 20081223Owner name: SYNTHES USA, LLC,PENNSYLVANIAFree format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100211;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100223;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100309;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100329;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100330;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100406;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100420;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100427;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100504;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100511;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);US-ASSIGNMENT DATABASE UPDATED:20100525;REEL/FRAME:22826/140Free format text: CHANGE OF NAME;ASSIGNOR:SYNTHES (U.S.A.);REEL/FRAME:22826/140RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google