Source: http://www.google.com/patents/US7073415?dq=6519629
Timestamp: 2016-10-26 01:16:11
Document Index: 792789102

Matched Legal Cases: ['art.\n9', 'art 26', 'art 28', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 12', 'art 13', 'art 13', 'art 12', 'art 8']

Patent US7073415 - Instrument system for pedicle screws - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsThe invention relates to an instrument system for pedicle screws having a thread in their head which has a clamping screw in the direction of their screw axes, which can be actuated by a power screw driver, with holders for the absorbing of a torque contacting the head of the pedicle screw in a shape...http://www.google.com/patents/US7073415?utm_source=gb-gplus-sharePatent US7073415 - Instrument system for pedicle screwsAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7073415 B2Publication typeGrantApplication numberUS 10/829,123Publication dateJul 11, 2006Filing dateApr 21, 2004Priority dateApr 24, 2003Fee statusLapsedAlso published asCN1286434C, CN1550219A, DE50302889D1, EP1470790A1, EP1470790B1, US20050010220Publication number10829123, 829123, US 7073415 B2, US 7073415B2, US-B2-7073415, US7073415 B2, US7073415B2InventorsSimon Casutt, Nimrod Meier, Marc HuberOriginal AssigneeCenterpulse Orthopedics Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (47), Classifications (20), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetInstrument system for pedicle screws
US 7073415 B2Abstract
1. An instrument system comprising pedicle screws having an internal thread in their head, said thread accepting a grub screw with an external diameter D1 in the direction of the screw axis to fixedly clamp a connection part which projects transversely to the screw axis into the head, further comprising: at least two holders with a tubular part, at least one of said holders being provided with projections configured for engaging in a shape matched manner at the head of the pedicle screws; a screwdriver with a diameter D4 adapted to be positioned at the grub screw, the tubular parts of the at least two holders, being supportable at the head of the pedicle screws; and a centering part adapted to be screwed into the internal thread of the pedicle screws, instead of the grub screw, and to be gripped when one of said holders is mounted on the centering part corresponding in its external diameter D to the diameter D1 of the grub screw with the tubular parts having an internal diameter D2 which essentially equals with a loose-fit oversize, the diameter D1 of the grub screw, in order to position the grub screw with the screwdriver or the centering part guided through the tubular part to the head of the pedicle screw such that threads of the grub screw engage with the internal thread of the pedicle screws in a non-tilted manner, wherein the centering part has a central region in the longitudinal direction which can be elastically deflected up to an angle of 20� or more away from the longitudinal axis.
4. An instrument system in accordance with claim 1, wherein the centering part has a lower diameter D3 in its central region in order, as a flexural spring, to allow an envisaged deflection.
5. An instrument system in accordance with claim 1, wherein the centering part has substantially circular cross-sections and jacket lines with gentle, stepless transitions in the longitudinal direction following the central region.
6. An instrument system in accordance with claim 4, wherein the centering part has substantially circular cross-sections and jacket lines with gentle, stepless transitions in the longtitudinal direction following the central region.
7. An instrument system in accordance with claim 1, wherein one of said holders combines with a centering part to form a positioning apparatus for pedicle screws and comprises a fixing element blocking in an axial direction with respect to the centering part, said centering part in turn being screwed into the head of the pedicle screw.
8. An instrument system in accordance with claim 7, wherein the fixing element is in the form of a clamping screw which is supported at its head on the holder and engages in the axial direction into an internal thread at the rear part of the centering part.
9. An instrument system in accordance with claim 7, wherein the fixing element acts as a lever on a transverse groove of the centering element.
10. An instrument system in accordance with claim 1, wherein a tubular part includes a deflection apparatus for a band or cable pulled through the screw head a projecting shoe with a deflection arc and, at the other end of the tubular part, with respect to rotation, a shape matched coupling surface for a band or cable tensioner which supports the band or cable tensioner in the direction towards the pedicle screw.
11. An instrument system in accordance with claim 10, wherein the deflection arc has a radius of curvature larger than 3 mm along its base.
12. An instrument system in accordance with claim 10, wherein the shoe has a deflection roller instead of a deflection arc.
This application claims priority of European Patent Application 03 009 326.4 filed Apr. 24, 2003.
Pedicle screws with clamping screws in their heads are described in the patent EP-A-0669 109. The company Centerpulse Orthopedics Ltd., CH-6340 Baar, Switzerland, distributes a stabilisation system with pedicle screws and associated instruments for spinal vertebrae under the name DYNESYS�. On the attachment of implants to the spinal column, it has previously only been possible with restrictions to use access approaches with little invasion when the natural structures should be largely maintained (Prof. Wiltse transmuscular approach or paraspinal approach). The operation field had to be prepared to be free in part from the centrally disposed spines of the vertebrae. The positioning of pedicle screws and the subsequent connection to stiffening elements requires great experience and skill in the surgeon.
If the central region in the elongate direction is made elastic so that an angular deviation in the central region of, for example, 20� is possible in the central region, then a holder guided at the centring part can also be moved toward the head of a non-visible pedicle screw in an arc and can displace the covering tissue in a gentle manner. One possibility of producing the required elasticity in the central region consists of using a flexurally elastic material for the central part and/or of reducing the cross-section such that no unpermitted bending stresses occur. A further possibility consists of designing the central part as a multiple wire or as a helical spring in order to achieve a necessary elasticity.
For pedicle screws of the aforesaid product DYNESYS�, the following operation sequence can for example be carried out with the instrument system described above when positioning in two adjacent vertebrae without the contact to the respective pedicle screw being lost:
a2) Analogue to a1) Putting on the first holder.
Determining the spacing of the 1st and 2nd pedicle screws under a pre-determined spreading force to define the required length for a spacer to be pushed onto the cable. (A parallel application with the same application date has been filed for this device). The spreading instrument can be oriented on the first pedicle screw for the positioning at the screwed-in centring part of the second pedicle screw and at the cable. Establishing of the pre-determined spacer length by cutting off the excess and pulling the pressure spacer onto the cable until the spacer abuts the 1st pedicle screw.
FIG. 7 the lower part of the holder in FIG. 6, rotated by 90� in section;
FIG. 13 schematically, the holder of FIG. 12, rotated by 90� in section;
FIG. 16 schematically, a side view of the screwdriver of FIG. 15 rotated by 90�;
The front part 26 of the first holder 6 a is fixedly screwed into a handle part 28 in which the tubular shape with diameter D2 continues. A peripheral transverse groove 15, into which a lever 11 forked at the front projects in order to lock the screwed-in centring part 12 axially with a predetermined axial force, is applied in the region of the handle 28 to the centring part 12, whose central region 13 will be looked at in detail later. The function which this fixing element 14 exerts could likewise be realised with a radially moving in adjusting screw whose front edge is made in a conically tapering manner. Without the transverse groove 15, a clamping by a radially screwed in screw would be sufficient. In the present case, the lever 11 fixed by an axle 29 is provided with a contour 38 onto which a tappet 35 acted on by a compression spring 36 presses. The centring part 12 is latched in the position drawn. On turning back the lever 11, the front part of the contour 38, which corresponds to an arc of a circle piece about the axle 29, moves onto the tappet and into a region which is perpendicular to the axle 29 with respect to the tappet 35 such that the centring part 12 is freed and the first holder 6 a can be released from the head 2 and can be removed, while the centring part 12 remains in the head. A plug 37 closes the bore which is necessary to introduce compression springs 36 and a tappet 35. The centring part 12 in FIG. 5 is designed in its central range 13 as a flexural spring with a diameter D3 which is reached in each case via a conical transition piece 20. This central part 13 can be deflected elastically, for example, by up to 20� or more. The conical transition pieces 20 prevent the central part 13 from catching on any edges despite the deflection.
FIG. 21 shows such an asymmetric profile. For the specific case of a clamping screw 73 with a head 72 which is provided at a pedicle screw for a centring part 12, the profile is included by an outer circle 80 with a diameter 15 mm. The profile is repeated at a spacing of 120� and is provided for a clamping screw 73 with a right hand thread. For this reason, the flanks which rise in the counter clockwise direction and via which the tension torque has to be applied, extend in a much shallower manner than the flanks rising in the clockwise direction for the releasing. When a maximum possible engaging force in the radial direction is assumed, this is achieved with a substantially smaller torque in the clockwise direction. In the example shown with an outer circle 80 with a diameter 15 mm, the flanks rising in the clockwise direction are produced by an arc of a circle with a radius 81 which merges tangentially into the outer circle 80 and has its centre at an inner circle with radius 79 which here amounts to 1.5 mm. The flanks rising in the counter clockwise direction are produced with an arc of a circle with a radius 83 which intersects the outer circle perpendicularly and has an amount of 2 mm such that a shoulder 82 of approximately 2 mm projects in the counter clockwise direction.
Generally, different angular spacings than 120� are also possible to arrive at a similar result with respect to torque limitation.
The further holder 6 c likewise has a separately produced mouth 27 at which a shoe 17 is shaped which, when the holder is mounted, continues a passage bore through the head 2 with a deflection arc 18 by approximately 90�, with the deflection arc 18 being positioned at the passage bore continuously at its base 19. The deflection arc is made with a radius of curvature of more than 3 mm so that too much friction does not even arise by the deflection with a stiff cable 16 pulled through the passage bore. In a variant (see FIG. 23), the deflection arc 18 has been replaced by a moving deflection arc, that is by a roll 18 a which is supported in laterally projecting jaws in the shoe 17.
The upper part of the holder 6 c is made as a projecting arm 43 which has coupling surfaces 23 for a forceps-like cable tensioner (not shown). Such cable tensioners are separate, forceps-like tools having two limbs widening toward one another of which one is supported, for example, at the head 2 of the pedicle screw, while the other grips the cable and pulls it past the first limb. Cable tensioners are sold as tools for the previously mentioned product DYNESYS� of the company Centerpulse Orthopedics Ltd. Such a cable tensioner is positioned on the coupling surface 23 with the non-gripping limb after the cable 16 has been gripped by the gripping limb. The coupling surface 23 secures the non-gripping limb against turning about the tubular part 8 and simultaneously supports it in the direction towards the deflection arc 18.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5941885 *Oct 8, 1996Aug 24, 1999Jackson; Roger P.Tools for use in installing osteosynthesis apparatus utilizing set screw with break-off headUS6235028Feb 14, 2000May 22, 2001Sdgi Holdings, Inc.Surgical guide rodUS6251112Apr 18, 2000Jun 26, 2001Roger P. JacksonThin profile closure cap for open ended medical implantDE10005134A1Feb 4, 2000Aug 16, 2001Copf JunAnchor elements are anchored in pedicle, each with fixture for reposition instrument, connecting rod, extension element and fixturesEP0669101B1Feb 23, 1995Sep 29, 1999LaserSurge, Inc.Apparatus for applying a cinch member to the ends of a sutureEP0669109B1Feb 28, 1994May 26, 1999Sulzer Orthop�die AGStabilizer for adjacent vertebraeEP1103225A2Oct 26, 2000May 30, 2001Sulzer Orthopedics Ltd.Surgical instrument for tensioning a cable-like tension elementFR2703288A1 Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS7575581 *Dec 7, 2006Aug 18, 2009Blackstone Medical, Inc.Device for holding and inserting one or more components of a pedicle screw assemblyUS7922725Apr 19, 2007Apr 12, 2011Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization systemUS7938044Aug 7, 2008May 10, 2011Alphatec Spine, Inc.Locking screw driver handleUS8038699Oct 18, 2011Ebi, LlcPercutaneous instrument assemblyUS8105367Jun 15, 2009Jan 31, 2012Smith & Nephew, Inc.Bone plate and bone plate assemblies including polyaxial fastenersUS8156847Apr 17, 2012Alphatec Spine, Inc.Undercut screw feature and driverUS8162952Apr 24, 2012Ebi, LlcPercutaneous instrument assemblyUS8267968Jun 24, 2009Sep 18, 2012Neuropro Technologies, Inc.Percutaneous system for dynamic spinal stabilizationUS8292899 *Oct 23, 2012Olsen Russell GApparatus and system for orthopedic fastener insertion and extractionUS8328849Dec 1, 2009Dec 11, 2012Zimmer GmbhCord for vertebral stabilization systemUS8382807Feb 26, 2013Smith & Nephew, Inc.Systems and methods for using polyaxial platesUS8388659Oct 19, 2009Mar 5, 2013Theken Spine, LlcSpondylolisthesis screw and instrument for implantationUS8491588Jun 13, 2011Jul 23, 2013Warsaw Orthopedic, Inc.Surgical instrument for securing a spinal rodUS8540756Aug 13, 2010Sep 24, 2013Ortho Vation Medical LlcSurgical fastener and associated systems and methodsUS8632572Mar 15, 2011Jan 21, 2014Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization systemUS8763499 *Nov 29, 2012Jul 1, 2014The University Of North Carolina At Chapel HillScrew holder-driver apparatuses, systems and methodsUS8876867Jun 24, 2009Nov 4, 2014Zimmer Spine, Inc.Spinal correction tensioning systemUS8888824Feb 22, 2013Nov 18, 2014Smith & Nephew, Inc.Systems and methods for using polyaxial platesUS8940024May 8, 2012Jan 27, 2015Biedermann Technologies Gmbh & Co. KgBone anchoring deviceUS8940028Jul 25, 2006Jan 27, 2015Smith & Nephew, Inc.Systems and methods for using polyaxial platesUS8992581Jan 12, 2012Mar 31, 2015Smith & Nephew, Inc.Bone plate and bone plate assemblies including polyaxial fastenersUS9192415May 14, 2013Nov 24, 2015Nuvasive, Inc.Systems and methods for holding and implanting bone anchorsUS9198698Apr 25, 2012Dec 1, 2015Nuvasive, Inc.Minimally invasive spinal fixation system and related methodsUS9241739Sep 11, 2009Jan 26, 2016DePuy Synthes Products, Inc.Spinal stabilizing and guiding fixation systemUS9277940 *Feb 5, 2008Mar 8, 2016Zimmer Spine, Inc.System and method for insertion of flexible spinal stabilization elementUS9289246Dec 29, 2014Mar 22, 2016Biedermann Technologies Gmbh & Co. KgBone anchoring deviceUS9339299Sep 24, 2014May 17, 2016Zimmer Spine, Inc.Spinal correction tensioning systemUS9381043May 2, 2012Jul 5, 2016Biedermann Technologies Gmbh & Co. KgInsert for a tool for assembling a bone anchoring device and tool for assembling a bone anchoring deviceUS9431868 *Jan 19, 2011Aug 30, 2016Tolomatic, Inc.Manual override device for an electric actuator and method for useUS20070233155 *Dec 7, 2006Oct 4, 2007Lovell John RDevice and method for holding and inserting one or more components of a pedicle screw assemblyUS20080051787 *Jun 29, 2007Feb 28, 2008Neuropro Technologies, Inc.Percutaneous system for dynamic spinal stabilizationUS20080114457 *Nov 14, 2006May 15, 2008Warsaw Orthopedic, Inc.Methods and devices for connecting implants and devicesUS20080262551 *Apr 19, 2007Oct 23, 2008Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization systemUS20090038446 *Aug 7, 2008Feb 12, 2009Ensign Michael DLocking Screw Driver HandleUS20090198281 *Feb 5, 2008Aug 6, 2009Zimmer Spine, Inc.System and method for insertion of flexible spinal stabilization elementUS20090287225 *May 15, 2009Nov 19, 2009Olsen Russell GApparatus, system, and method for orthopedic fastener insertion and extractionUS20100030278 *Jul 28, 2009Feb 4, 2010Hawkes David TUndercut Screw Feature and DriverUS20100331885 *Jun 24, 2009Dec 30, 2010Neuropro Technologies, Inc.Percutaneous system for dynamic spinal stabilizationUS20110087293 *Apr 14, 2011Ebi, LlcDeformable Device For Minimally Invasive FixationUS20110130792 *Jun 2, 2011Zimmer GmbhCord for vertebral stabilization systemUS20110166604 *Jul 7, 2011Zimmer Spine, Inc.Method and associated instrumentation for installation of spinal dynamic stabilization systemUS20110276098 *Nov 10, 2011Lutz BiedermannReceiving part for receiving a rod for coupling the rod to a bone anchoring element, bone anchoring device, method and tool for assembling the sameUS20120019109 *Jan 26, 2012Gary RosengrenManual override device for an electric actuator and method for useUS20130125714 *May 23, 2013The University Of North Carolina At Chapel HillScrew holder-driver apparatuses, systems and methodsWO2008024689A2 *Aug 17, 2007Feb 28, 2008Neuropro Technologies, Inc.Percutaneous system for dynamic spinal stabilizationWO2008024689A3 *Aug 17, 2007Jun 26, 2008Daniel R BakerPercutaneous system for dynamic spinal stabilizationWO2009021115A2 *Aug 7, 2008Feb 12, 2009Alpinespine LlcLocking screw driver handle* Cited by examinerClassifications U.S. Classification81/451, 81/459, 606/104International ClassificationA61B17/02, A61B17/88, B25B23/08, A61B17/58, A61B19/00, A61B17/70Cooperative ClassificationA61B17/7082, A61B17/7008, A61B2090/061, A61B17/7001, A61B17/7077, A61B17/7031, A61B2017/0256, A61B17/8869, A61B17/7091European ClassificationA61B17/70B1R12, A61B17/70B1C6Legal EventsDateCodeEventDescriptionAug 30, 2004ASAssignmentOwner name: CENTERPULSE ORTHOPEDICS LTD., SWITZERLANDFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CASUTT, SIMON;MEIER, NIMROD;HUBER, MARC;REEL/FRAME:015745/0208;SIGNING DATES FROM 20040709 TO 20040812Jul 10, 2006ASAssignmentOwner name: ZIMMER GMBH, SWITZERLANDFree format text: TRANSFORMATION WITHOUT LIQUIDATION;ASSIGNOR:CENTERPULSE ORTHOPEDICS LTD;REEL/FRAME:017897/0708Effective date: 20040630Owner name: ZIMMER GMBH,SWITZERLANDFree format text: TRANSFORMATION WITHOUT LIQUIDATION;ASSIGNOR:CENTERPULSE ORTHOPEDICS LTD;REEL/FRAME:017897/0708Effective date: 20040630Dec 22, 2009FPAYFee paymentYear of fee payment: 4Feb 21, 2014REMIMaintenance fee reminder mailedJul 11, 2014LAPSLapse for failure to pay maintenance feesSep 2, 2014FPExpired due to failure to pay maintenance feeEffective date: 20140711RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services