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US20070157543A1 - Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra - Google Patents

Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra Download PDF

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Publication number
US20070157543A1
US20070157543A1 US10/557,127 US55712704A US2007157543A1 US 20070157543 A1 US20070157543 A1 US 20070157543A1 US 55712704 A US55712704 A US 55712704A US 2007157543 A1 US2007157543 A1 US 2007157543A1
Authority
US
United States
Prior art keywords
bearing
rod
anchoring
anchoring element
bearing shell
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.)
Abandoned
Application number
US10/557,127
Other languages
English (en)
Inventor
Peter Metz-Stavenhagen
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 US20070157543A1 publication Critical patent/US20070157543A1/en
Abandoned legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7035—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other
    • A61B17/7037—Screws or hooks, wherein a rod-clamping part and a bone-anchoring part can pivot relative to each other wherein pivoting is blocked when the rod is clamped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant
    • A61B17/7001—Screws or hooks combined with longitudinal elements which do not contact vertebrae
    • A61B17/7032—Screws or hooks with U-shaped head or back through which longitudinal rods pass

Definitions

  • the present invention relates to an anchoring element for fastening a rod of a device for adjusting a human or animal spine to a vertebral bone, said anchoring element having a screw element and a retaining element, the screw element comprising a bearing element in the shape of a spherical segment and a threaded shank provided with a conical taper and the retaining element comprising a mounting for receiving the is rod and a bearing shell for receiving the bearing element of the screw element.
  • An anchoring element in which the screw element is configured to be detached from the retaining element is known from EP 0 885 598 A2.
  • a bearing element disposed on the screw element is thereby configured in the shape of a spherical segment so that the retaining element is pivotal in any direction with respect to the screw element.
  • Such type anchoring elements are often referred to as polyaxial screws.
  • An anchoring element configured in accordance with this technical solution has the advantage that having the bearing element directly carried in the bearing shell allows a clamping element known from prior art to be eliminated. Material savings can thus be made on the very expensive titanium and construction can be simplified so chat the anchoring element of the invention can be manufactured at a much lower cost.
  • a rod is placed into the preferably U-shaped mounting of the anchoring element of the invention and is fixed with a screwable securing element. Said rod thereby pushes onto the bearing element in the shape of a spherical segment and presses it into the bearing shell. As a result, an increased friction is generated between the bearing element and the bearing shell, said friction retaining the holding element with respect to the screw element in the momentary position.
  • the bearing element comes to rest against the bearing shell by a portion of its surface only, the pressure exerted by the rod via the bearing element onto the bearing shell is sufficient to prevent the holding element from sliding out of place with respect to the screw element as soon as the rod is firmly fixed in the mounting.
  • the surface of the bearing element and/or the bearing shell with dimples or to roughen the same, more specifically to provide for a number of flutes or grooves in the surface of the bearing element and/or the bearing shell.
  • FIG. 1 is a front view of an anchoring element of the invention with the securing element being pulled out to show an exploded view thereof;
  • FIG. 2 a is a sectional view of the anchoring element of FIG. 1 , taken along the line II-II of FIG. 1 in a first position;
  • FIG. 2 b is a sectional view of the anchoring element of FIG. 1 , taken along the line II-II of FIG. 1 in a second position;
  • FIG. 3 is a top view of the anchoring element of FIG. 1 , taken along the line III-III of FIG. 1 ;
  • FIG. 4 a is a perspective partial view of the anchoring element of FIG. 2 a;
  • FIG. 4 b is a perspective partial view of the anchoring element of FIG. 2 b;
  • FIG. 5 is a perspective view of the bearing element of the anchoring element of FIG. 1 ;
  • FIG. 6 a is a partial perspective view of a second embodiment of an anchoring element of the invention in a first position, illustrated in partial section view;
  • FIG. 6 b is a partial perspective view of a second embodiment of an anchoring element of FIG. 6 a in a second position, illustrated in partial section view;
  • the anchoring element illustrated in the FIGS. 1 through 5 is a component part of a device for adjusting a human or animal spine.
  • This anchoring element serves to fasten a quite long rod to a vertebral bone and includes a holding element 10 with a mounting 12 for receiving a rod that has not been illustrated herein and a bearing shell 14 connected to, and integral with, said mounting 12 and a screw element 16 having a threaded shank 18 with a conical taper and a bearing element 20 in the shape of a spherical segment connected to, and integral with, the threaded shank 18 .
  • the thread of the threaded shank 18 is for example configured to be a bio thread, a cancellous thread or the like and a wrench receiving bore 22 for a hexagon socket is provided on an upper side of the bearing element 20 so that the screw element can be readily introduced into, and fixated to, a vertebral body.
  • the mounting 12 is configured in a U shape and includes two coaxially disposed ridges 24 , 26 on the inner side of which there is formed a buttress thread 28 .
  • This buttress thread 28 is described in detail in EP 0 885 598 A2.
  • a securing element implemented as a grub screw 30 can be screwed in the axial direction into the mounting 12 in order to fixate the rod placed into the mounting 12 .
  • the bearing element 20 On its surface configured in the shape of a spherical segment, the bearing element 20 is provided with a number of flutes 32 that are oriented obliquely. On one half of the bearing element 20 , the flutes 32 are thereby oriented in another direction than on the opposite half of said bearing element 20 .
  • FIGS. 6 a and 6 b illustrate another embodiment of the anchoring element of the invention. This embodiment differs from the first one in that all of the flutes 32 distributed over the entire surface of the bearing element are disposed so as to be oriented in opposite directions so that a fluting 34 is formed on the surface of the bearing element.
  • the rod is placed into the mounting 12 and is at first retained by the grub screw 30 .
  • the grub screw 30 is tightened so that the desired positions of the rod and the spine are fixed.
  • the grub screw 30 thereby pushes onto the rod that has not been illustrated herein and the latter in turn presses the bearing element 20 into the bearing shell 14 .
  • the surface of the bearing element 20 which is provided with the flutes 32 or a fluting 34 , is thereby pushed into the bearing shell 14 so as to generate a very high surface pressure. This high surface pressure permits to fix the bearing shell 14 with respect to the bearing element 20 so that the holding element 10 is retained in the desired position with respect to the screw element 16 .

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)
US10/557,127 2003-05-19 2004-05-03 Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra Abandoned US20070157543A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE20307776.8 2003-05-19
DE20307776U DE20307776U1 (de) 2003-05-19 2003-05-19 Verankerungselement zur Befestigung eines Stabes einer Vorrichtung zum Einrichten einer menschlichen oder tierischen Wirbelsäule an einem Wirbelknochen
PCT/DE2004/000834 WO2004103193A1 (de) 2003-05-19 2004-05-03 Verankerungselement zur befestigung eines stabes einer vorrichtung zum einrichten einer menschlichen oder tierischen wirbelsäule an einem wirbelknochen

Publications (1)

Publication Number Publication Date
US20070157543A1 true US20070157543A1 (en) 2007-07-12

Family

ID=33039398

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/557,127 Abandoned US20070157543A1 (en) 2003-05-19 2004-05-03 Anchoring element for fixing a rod of a device for setting a human or animal spinal column to a vertebra

Country Status (4)

Country Link
US (1) US20070157543A1 (de)
EP (1) EP1624817A1 (de)
DE (2) DE20307776U1 (de)
WO (1) WO2004103193A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090105756A1 (en) * 2007-10-23 2009-04-23 Marc Richelsoph Spinal implant
US9421041B2 (en) 2008-09-09 2016-08-23 Marc E. Richelsoph Polyaxial screw assembly
US9526531B2 (en) 2013-10-07 2016-12-27 Intelligent Implant Systems, Llc Polyaxial plate rod system and surgical procedure

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110218580A1 (en) 2010-03-08 2011-09-08 Stryker Trauma Sa Bone fixation system with curved profile threads

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5647873A (en) * 1995-04-13 1997-07-15 Fastenetix, L.L.C. Bicentric polyaxial locking screw and coupling element
US6254602B1 (en) * 1999-05-28 2001-07-03 Sdgi Holdings, Inc. Advanced coupling device using shape-memory technology
US6302888B1 (en) * 1999-03-19 2001-10-16 Interpore Cross International Locking dovetail and self-limiting set screw assembly for a spinal stabilization member
US20020026193A1 (en) * 1999-09-01 2002-02-28 B. Thomas Barker Multi-axial bone screw assembly
US6371957B1 (en) * 1997-01-22 2002-04-16 Synthes (Usa) Device for connecting a longitudinal bar to a pedicle screw
US20030216735A1 (en) * 2002-05-15 2003-11-20 Moti Altarac Variable locking spinal screw having a knurled collar

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5002542A (en) * 1989-10-30 1991-03-26 Synthes U.S.A. Pedicle screw clamp
US5466237A (en) * 1993-11-19 1995-11-14 Cross Medical Products, Inc. Variable locking stabilizer anchor seat and screw
US5885286A (en) * 1996-09-24 1999-03-23 Sdgi Holdings, Inc. Multi-axial bone screw assembly
DE29710484U1 (de) 1997-06-16 1998-10-15 Howmedica GmbH, 24232 Schönkirchen Aufnahmeteil für ein Haltebauteil eines Wirbelsäulenimplantats
US6488681B2 (en) * 2001-01-05 2002-12-03 Stryker Spine S.A. Pedicle screw assembly
DE20207851U1 (de) * 2002-05-21 2002-10-10 Metz-Stavenhagen, Peter, Dr.med., 34537 Bad Wildungen Verankerungselement zur Befestigung eines Stabes einer Vorrichtung zum Einrichten einer menschlichen oder tierischen Wirbelsäule an einem Wirbelknochen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5647873A (en) * 1995-04-13 1997-07-15 Fastenetix, L.L.C. Bicentric polyaxial locking screw and coupling element
US6371957B1 (en) * 1997-01-22 2002-04-16 Synthes (Usa) Device for connecting a longitudinal bar to a pedicle screw
US6302888B1 (en) * 1999-03-19 2001-10-16 Interpore Cross International Locking dovetail and self-limiting set screw assembly for a spinal stabilization member
US6254602B1 (en) * 1999-05-28 2001-07-03 Sdgi Holdings, Inc. Advanced coupling device using shape-memory technology
US20020026193A1 (en) * 1999-09-01 2002-02-28 B. Thomas Barker Multi-axial bone screw assembly
US20030216735A1 (en) * 2002-05-15 2003-11-20 Moti Altarac Variable locking spinal screw having a knurled collar

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090105756A1 (en) * 2007-10-23 2009-04-23 Marc Richelsoph Spinal implant
US20110213419A1 (en) * 2007-10-23 2011-09-01 Blackstone Medical Inc. Spinal Implant
US9456851B2 (en) 2007-10-23 2016-10-04 Intelligent Implant Systems, Llc Spinal implant
US9421041B2 (en) 2008-09-09 2016-08-23 Marc E. Richelsoph Polyaxial screw assembly
US9433440B2 (en) 2008-09-09 2016-09-06 Intelligent Implant Systems Llc Polyaxial screw assembly
US9603629B2 (en) 2008-09-09 2017-03-28 Intelligent Implant Systems Llc Polyaxial screw assembly
US9526531B2 (en) 2013-10-07 2016-12-27 Intelligent Implant Systems, Llc Polyaxial plate rod system and surgical procedure
US9956010B2 (en) 2013-10-07 2018-05-01 Intelligent Implant Systems, Llc Polyaxial plate rod system and surgical procedure

Also Published As

Publication number Publication date
WO2004103193A1 (de) 2004-12-02
DE112004001374D2 (de) 2006-04-13
EP1624817A1 (de) 2006-02-15
DE20307776U1 (de) 2004-09-23

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Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION