EP1603469A1 - Posterior fusion system of pedicle screw-rod-connector - Google Patents

Posterior fusion system of pedicle screw-rod-connector

Info

Publication number
EP1603469A1
EP1603469A1 EP01970040A EP01970040A EP1603469A1 EP 1603469 A1 EP1603469 A1 EP 1603469A1 EP 01970040 A EP01970040 A EP 01970040A EP 01970040 A EP01970040 A EP 01970040A EP 1603469 A1 EP1603469 A1 EP 1603469A1
Authority
EP
European Patent Office
Prior art keywords
screw
rod
degrees
nut
joint
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP01970040A
Other languages
German (de)
English (en)
French (fr)
Inventor
Christos Kalaitzis
Theologos Theologou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1603469A1 publication Critical patent/EP1603469A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7041Screws or hooks combined with longitudinal elements which do not contact vertebrae with single longitudinal rod offset laterally from single row of screws or hooks
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002Longitudinal elements, e.g. rods
    • A61B17/7004Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A61B17/7005Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit in the screw or hook heads
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
    • A61B17/7001Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7002Longitudinal elements, e.g. rods
    • A61B17/7011Longitudinal element being non-straight, e.g. curved, angled or branched
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8625Shanks, i.e. parts contacting bone tissue
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/8625Shanks, i.e. parts contacting bone tissue
    • A61B17/8635Tips of screws
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/84Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86Pins or screws or threaded wires; nuts therefor
    • A61B17/869Pins or screws or threaded wires; nuts therefor characterised by an open form, e.g. wire helix

Definitions

  • H.S. Human Spine (H.S.), implant-pedicle screw, joint, divisible rod, helical spring
  • the posterior fusion systems are generally used in the stabilization of the Human Spine, in f actures, degenerative spine diseases, and deformities that cause various functional, neurological problems, etc.
  • the materials are screws that pass through the vertebrae's pedicles, two per vertebra and are connected to one another onto a rod with the use of a joint.
  • the new technique is based on improvements of the biomechanical behavior of the points that used to be the main cause of total or partial failure of the fusion's materials.
  • the screw has been designed so that on the one hand it is not as rigid as in all other systems and on the other hand it functions with implant's characteristics. Hence, it is fully embodied in the bone where it is implanted. Its body's elasticity allows the absorption of the vibration loads that are responsible either for the fatigue and breakage or for the screw's loosening in the implantation site, since micro- movements can smoothen and destroy the walls (threads) of the bone's hole where it is screwed.
  • the screw's design with a hollow front section and S shaped helical spring which rotates itself at 180 degrees anti-clock wise, to all its length, pushing in its interior, the pieces of bone that it cuts into when it is being screwed clockwise, fills the internal section of the threads with the same bone where it is being implanted. This significantly reduces the demanded time for osteogenesis and its attachment on its touch points.
  • connection of the screw to the rod is performed in whichever position without any tension because the rod is not solid, but divisible, thanks to the joint's mechanism which before tightening the nut allows movement towards all directions.
  • we add the demanded rods one after the other, easily by opening the joint which accepts the spherical end of the rod in its two reception points, thus increasing the construction's length while tying the screws without demanding application of force or tension and contrary to the existing technique which in most cases demands the rod's bending so that the joint will be attached to the screw.
  • Our system has an advantage after implantation and positioning of the whole construction compared to the existing technique, when after the assembly we perform corrective maneuvers in order to bring the H.S. back to its normal height, correct kyfosis-angle formation, or derotate the scoliosis.
  • the divisible rod is a very important advantage especially in cases where we have to tie many vertebrae, making long constructions, since step by step and trough exercise of minimal force we succeed in gradual correction, contrary to the previous technique that is based on the pre-bent rod, which demands great force to be exercised hence causing the screw to be pulled out of position or breaking of the bone (pedicle).
  • Fig. 1 shows the screw with the thread of different design.
  • Fig. 2 shows the internal helical spring of the screw in a vertical cut, together with part of the thread.
  • Fig. 3 shows the lower hollow end of the screw.
  • Fig. 4 shows the rod with the two elliptic spheres on its edges.
  • Fig. 5 shows the joint open and fig. 6, shows it closed having engulfed the two ball-shaped ends inside the special upper and lower cavities of the rod.
  • Fig. 7 shows the screw tied to the rods and the nut secured.
  • Fig. 8 shows the whole construction in position.
  • Fig. 13 shows the helical internal spring 10 along the screw.
  • the screw fig. 1 is hollow on its end while it is of oblique and sharp end fig. 3, so that it cuts easily through the bone. While it is clockwise advanced with the screwdriver, the cut bone is gathered by the anti-clockwise 180 degrees helical spring 10 fig. 2, which starts after point 11, fig.l, continues up to the screw's head 12 fig. 1 and forms its internal structure, which is complemented by the perimetrical threads 13, that create two cavities, rotated around themselves at 180 degrees anti-clock wise, to all the length of the helical spring, 20 and 21 fig. 2.
  • the threads 13 fig. 1 lean and are attached on the helical spring.
  • the screw's body can be seen on fig.
  • Compartments (cavities) 21 and 22 fig. 2 that are created from the 180 degrees rotation of the spring 10, which is also the body of the screw, in the space and from the two tangent threads.
  • the screw's body is not solid but helical and with the threads, on its perimeter, creates the two compartments 21 and 22 fig.
  • the rod's head 40 On fig. 10 the rod's head 40 can be seen, it is placed on the two ends of the construction on the external side of the reception 17 fig. 5, unless a transverse bridge 44 fig. 11 is needed to be placed for better support and stability in rotational forces.
  • the joint's hole 15 fig. 5, is not round but oblong, so that we can tighten the screw on either side, in order to correct if needed and regain the gap's lost height, through increasing or decreasing the distance between the two screws and through the selecting a rod of an appropriate length.
EP01970040A 2000-09-22 2001-09-24 Posterior fusion system of pedicle screw-rod-connector Withdrawn EP1603469A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GR20000100319A GR1003754B (el) 2000-09-22 2000-09-22 Συστημα οπισθιας σπονδυλοδεσιας ραβδου-διαυχενικης βιδας-συνδετικου.
GR2000100319 2000-09-22
PCT/GR2001/000036 WO2002024087A1 (en) 2000-09-22 2001-09-24 Posterior fusion system of pedicle screw-rod-connector

Publications (1)

Publication Number Publication Date
EP1603469A1 true EP1603469A1 (en) 2005-12-14

Family

ID=10944382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01970040A Withdrawn EP1603469A1 (en) 2000-09-22 2001-09-24 Posterior fusion system of pedicle screw-rod-connector

Country Status (4)

Country Link
EP (1) EP1603469A1 (tr)
AU (1) AU2001290158A1 (tr)
GR (1) GR1003754B (tr)
WO (1) WO2002024087A1 (tr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6468309B1 (en) 2000-10-05 2002-10-22 Cleveland Clinic Foundation Method and apparatus for stabilizing adjacent bones
US6551322B1 (en) 2000-10-05 2003-04-22 The Cleveland Clinic Foundation Apparatus for implantation into bone
US6953462B2 (en) 2000-10-05 2005-10-11 The Cleveland Clinic Foundation Apparatus for implantation into bone
US6551320B2 (en) 2000-11-08 2003-04-22 The Cleveland Clinic Foundation Method and apparatus for correcting spinal deformity
US6544265B2 (en) 2000-11-08 2003-04-08 The Cleveland Clinic Foundation Apparatus for implantation into bone related applications
US6527774B2 (en) 2000-11-08 2003-03-04 The Cleveland Clinic Foundation Apparatus for attaching fractured sections of bone
US6488683B2 (en) 2000-11-08 2002-12-03 Cleveland Clinic Foundation Method and apparatus for correcting spinal deformity
US6551319B2 (en) 2000-11-08 2003-04-22 The Cleveland Clinic Foundation Apparatus for implantation into bone
DE10348329B3 (de) 2003-10-17 2005-02-17 Biedermann Motech Gmbh Stabförmiges Element für die Anwendung in der Wirbelsäulen- oder Unfallchirurgie,Stabilisierungseinrichtung mit einem solchen stabförmigen Element und Herstellungsverfahren für das stabförmige Element
US7967826B2 (en) 2003-10-21 2011-06-28 Theken Spine, Llc Connector transfer tool for internal structure stabilization systems
ES2331247T3 (es) * 2003-11-07 2009-12-28 Biedermann Motech Gmbh Elemento de resorte para un dispositivo de estabilizacion para huesos.
US8632570B2 (en) * 2003-11-07 2014-01-21 Biedermann Technologies Gmbh & Co. Kg Stabilization device for bones comprising a spring element and manufacturing method for said spring element
US7862586B2 (en) 2003-11-25 2011-01-04 Life Spine, Inc. Spinal stabilization systems
US7806914B2 (en) 2003-12-31 2010-10-05 Spine Wave, Inc. Dynamic spinal stabilization system
HU0400305D0 (en) * 2004-01-30 2004-03-29 Sanatmetal Ortopediai Es Traum Set for spine-fixture
US20060229611A1 (en) * 2005-03-30 2006-10-12 Sdgi Holdings, Inc. Spinal rod connector
JP2009512465A (ja) * 2005-09-30 2009-03-26 パラダイム・スパイン・リミテッド・ライアビリティ・カンパニー ヒンジ多軸ネジ及びその利用方法
US7927359B2 (en) 2005-10-06 2011-04-19 Paradigm Spine, Llc Polyaxial screw
US8043333B2 (en) 2007-06-08 2011-10-25 Synthes Usa, Llc Dynamic stabilization system
PL2476386T3 (pl) 2007-12-17 2013-11-29 Synthes Gmbh Dynamiczny element mocujący kość
US9492214B2 (en) 2008-12-18 2016-11-15 Michel H. Malek Flexible spinal stabilization system
WO2011057178A1 (en) * 2009-11-06 2011-05-12 Dean Lin System and method for stabilizing and fixating lumbar vertebrae
US9301787B2 (en) 2010-09-27 2016-04-05 Mmsn Limited Partnership Medical apparatus and method for spinal surgery
CN102429716A (zh) * 2011-12-19 2012-05-02 北京爱康宜诚医疗器材股份有限公司 融合型脊柱内固定螺钉
US9339316B2 (en) 2012-03-13 2016-05-17 DePuy Synthes Products, Inc. Dynamic bone fixation element
CN103099667A (zh) * 2013-02-22 2013-05-15 常州市斯博特医疗器械有限公司 可植骨型锚钉
CN104274236A (zh) * 2014-09-18 2015-01-14 常州市江浪铸造有限公司 辅助型骨钉

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FR2689750B1 (fr) * 1992-04-10 1997-01-31 Eurosurgical Element d'ancrage osseux et dispositif d'osteosynthese rachidienne incorporant de tels elements.
US5843082A (en) * 1996-05-31 1998-12-01 Acromed Corporation Cervical spine stabilization method and system
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Also Published As

Publication number Publication date
AU2001290158A1 (en) 2002-04-02
WO2002024087A1 (en) 2002-03-28
GR1003754B (el) 2002-01-15

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