WO2004103193A1 - Element d'ancrage servant a fixer sur une vertebre une barre d'un dispositif permettant d'ajuster une colonne vertebrale humaine ou animale - Google Patents

Element d'ancrage servant a fixer sur une vertebre une barre d'un dispositif permettant d'ajuster une colonne vertebrale humaine ou animale Download PDF

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Publication number
WO2004103193A1
WO2004103193A1 PCT/DE2004/000834 DE2004000834W WO2004103193A1 WO 2004103193 A1 WO2004103193 A1 WO 2004103193A1 DE 2004000834 W DE2004000834 W DE 2004000834W WO 2004103193 A1 WO2004103193 A1 WO 2004103193A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
rod
anchoring
grooves
bearing shell
Prior art date
Application number
PCT/DE2004/000834
Other languages
German (de)
English (en)
Inventor
Peter Metz-Stavenhagen
Original Assignee
Peter Metz-Stavenhagen
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 Peter Metz-Stavenhagen filed Critical Peter Metz-Stavenhagen
Priority to DE112004001374T priority Critical patent/DE112004001374D2/de
Priority to US10/557,127 priority patent/US20070157543A1/en
Priority to EP04730817A priority patent/EP1624817A1/fr
Publication of WO2004103193A1 publication Critical patent/WO2004103193A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • 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, setting implements or the like
    • 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 ; Bone 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, e.g. tourniquets
    • 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, setting implements or the like
    • 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 ; Bone 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

  • Anchoring element for fastening a rod of a device for setting up a human or animal spine to a vertebral bone
  • the present invention relates to an anchoring element for fastening a rod of a device for setting up a human or animal spine to a vertebral bone, with a screw and a holding element, the screw element having a spherical segment-shaped bearing element and a conically tapering threaded shaft, and wherein the holding element is one Has holder for receiving the rod and a bearing shell for receiving the bearing element of the screw element.
  • An anchoring element is known from EP 0 885 598 A2, in which the screw element is designed to be detached from the holding element.
  • a bearing element arranged on the screw element is designed in the form of a spherical segment, so that the holding element can be pivoted in all directions with respect to the screw element.
  • Such anchoring elements are often also referred to as a polyaxial screw.
  • a spring-elastic clamping element is provided between the bearing element and the holding element, which clamps against the holding element after mounting the rod in such a way that the bearing element together with the screw element is held firmly and non-slip in the current position.
  • This makes it possible to position the rod for setting up a human or animal spine in almost any position relative to the actual screw element and still achieve sufficient anchoring on the spine.
  • the arrangement of such a clamping element between the bearing element and the holding element is structurally very complex and requires a large amount of material. If you consider that such polyaxial screws are usually made of titanium, this is associated with very high costs. Proceeding from this, the object of the present invention is to create an anchoring element which has a lower material requirement and is easier to manufacture.
  • An anchoring element designed according to this technical solution has the advantage that a clamping element known from the prior art can be dispensed with due to the direct mounting of the bearing element in the bearing shell. In addition to saving the material of the very expensive titanium, this also simplifies the design, so that the anchoring element according to the invention can be produced much more cost-effectively.
  • a rod is inserted into the preferably U-shaped holder and fixed with a screwable securing element.
  • This rod presses on the spherical segment-shaped bearing element and presses it into the bearing shell. This creates an increased friction between the bearing element and the bearing shell, by means of which the holding element is held in the current position with respect to the screw element.
  • the bearing element only comes into contact with the bearing shell with part of its surface, the pressure exerted by the rod on the bearing element is sufficient to prevent the holding element from slipping against the screw element as soon as the rod is firmly fixed in the holder is.
  • the surface of the bearing element and / or the bearing shell with depressions or to roughen it, in particular on the surface of the Bearing element and / or the bearing shell to provide a number of grooves or grooves.
  • This surface design further reduces the contact surface between the bearing element and the bearing shell, so that the pressure exerted by the rod on the bearing element leads to increased surface pressure on the remaining contact surface, which ultimately leads to a higher frictional connection and reliably fixes the holding element relative to the screw element ,
  • Figure 1 is a front view of an anchoring element according to the invention with an exploded fuse element.
  • Fig. 2a the anchoring element according to FIG. 1, cut along line
  • FIG. 3 shows a top view of the anchoring element according to FIG. 1, cut along line III-III in FIG. 1;
  • FIG. 4a shows a perspective partial view of the anchoring element according to FIG. 2a
  • 4b shows a perspective partial view of the anchoring element according to FIG. 2b
  • Fig. 5 is a perspective view of the bearing element of the
  • FIG. 6a is a partially sectioned, perspective partial view of a second embodiment of an inventive
  • FIG. 6b is a partially sectioned, perspective partial view of the
  • Anchoring element according to FIG. 6a in a second position.
  • the anchoring element shown in Figures 1 to 5 is part of a device for setting up a human or animal spine.
  • This anchoring element is used to fasten a longer rod to a vertebral bone and comprises a holding element 10 with a holder 12 for receiving a rod (not shown here) and a bearing shell 14 integrally connected to the holder 12 and a screw element 16 with a conically tapered threaded shaft 18 and one integrally connected to the threaded shaft 18, spherical segment-shaped bearing element 20.
  • the thread of the threaded shaft 18 is designed, for example, as a bio thread, cancellous thread or the like, and a key receptacle 22 for an internal hexagon is provided on an upper side of the bearing element 20, so that the screw element can be easily fitted into one Vertebral body can be inserted and fixed there.
  • the holder 12 is U-shaped and comprises two coaxially arranged webs 24, 26, on the inside of which a sawtooth thread 28 is formed. This sawtooth thread 28 is described in detail in EP 0 885 598 A2.
  • a securing element designed as a grub screw 30 can be screwed into the holder 12 in the axial direction in order to fix the rod inserted into the holder 12.
  • the bearing element 20 is provided on its spherical segment surface with a number of grooves 32 which run obliquely. there the grooves 32 on one half of the bearing element 20 are oriented differently than on the opposite half of this bearing element 20.
  • FIGS. 6a and 6b A further embodiment of the anchoring element according to the invention is shown in FIGS. 6a and 6b. This differs from the first embodiment in that all the grooves 32 are arranged in opposite directions over the entire surface of the bearing element, so that a corrugation 34 is formed on the surface of the bearing element.
  • the rod is inserted into the holder 12 and held roughly with the grub screw 30 first of all.
  • the grub screw 30 is tightened so that the rod and the spine are fixed in the desired position.
  • the grub screw 30 presses on the rod (not shown here) and this in turn presses the bearing element 20 into the bearing shell 14.
  • the surface of the bearing element 20 provided with the grooves 32 or corrugations 34 is pressed into the bearing shell 14 in such a way that a very high one Surface pressure arises. By means of this high surface pressure, a> fixation of the bearing shell 14 with respect to the bearing element 20 is achieved, so that the holding element 10 is held 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)

Abstract

L'invention concerne un élément d'ancrage servant à fixer sur une vertèbre une barre d'un dispositif permettant d'ajuster une colonne vertébrale humaine ou animale. Cet élément d'ancrage comprend un élément fileté (16) et un élément de retenue, ledit élément fileté (16) étant composé d'un élément d'appui en forme de segment sphérique et d'une tige filetée (18) taillée en pointe et ledit élément de retenue présentant un support (12) destiné à recevoir la barre et une coquille (14) prévue pour recevoir l'élément d'appui dudit élément fileté (16). L'objectif de cette invention est d'obtenir un élément d'ancrage à faible besoin en matières et simple à fabriquer. A cet effet, la coquille (14) est conçue de façon à correspondre à l'élément d'appui, de sorte cet élément d'appui peut être logé directement dans ladite coquille (14).
PCT/DE2004/000834 2003-05-19 2004-05-03 Element d'ancrage servant a fixer sur une vertebre une barre d'un dispositif permettant d'ajuster une colonne vertebrale humaine ou animale WO2004103193A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE112004001374T DE112004001374D2 (de) 2003-05-19 2004-05-03 Verankerungselement zur Befestigung eines Stabes einer Vorrichtung zum Einrichten einer menschlichen oder tierischen Wirbelsäule an einem Wirbelknochen
US10/557,127 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
EP04730817A EP1624817A1 (fr) 2003-05-19 2004-05-03 Element d'ancrage servant a fixer sur une vertebre une barre d'un dispositif permettant d'ajuster une colonne vertebrale humaine ou animale

Applications Claiming Priority (2)

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

Publications (1)

Publication Number Publication Date
WO2004103193A1 true WO2004103193A1 (fr) 2004-12-02

Family

ID=33039398

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2004/000834 WO2004103193A1 (fr) 2003-05-19 2004-05-03 Element d'ancrage servant a fixer sur une vertebre une barre d'un dispositif permettant d'ajuster une colonne vertebrale humaine ou animale

Country Status (4)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9339315B2 (en) 2010-03-08 2016-05-17 Stryker European Holdings I, Llc Bone fixation system with curved profile threads

Families Citing this family (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
US9603629B2 (en) 2008-09-09 2017-03-28 Intelligent Implant Systems Llc Polyaxial screw assembly
US9044273B2 (en) 2013-10-07 2015-06-02 Intelligent Implant Systems, Llc Polyaxial plate rod system and surgical procedure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0425783A1 (fr) * 1989-10-30 1991-05-08 Synthes AG, Chur Pince pour une vis pédiculaire
EP0885598A2 (fr) 1997-06-16 1998-12-23 Howmedica GmbH Partie de réception pour un élément de retenue d'un implant de colonne vertébrale
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

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5466237A (en) * 1993-11-19 1995-11-14 Cross Medical Products, Inc. Variable locking stabilizer anchor seat and screw
US5520690A (en) * 1995-04-13 1996-05-28 Errico; Joseph P. Anterior spinal polyaxial locking screw plate assembly
US5885286A (en) * 1996-09-24 1999-03-23 Sdgi Holdings, Inc. Multi-axial bone screw assembly
US6488681B2 (en) * 2001-01-05 2002-12-03 Stryker Spine S.A. Pedicle screw assembly
US6733502B2 (en) * 2002-05-15 2004-05-11 Cross Medical Products, Inc. Variable locking spinal screw having a knurled collar
DE20207851U1 (de) * 2002-05-21 2002-10-10 Metz Stavenhagen Peter 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
EP0425783A1 (fr) * 1989-10-30 1991-05-08 Synthes AG, Chur Pince pour une vis pédiculaire
US6371957B1 (en) * 1997-01-22 2002-04-16 Synthes (Usa) Device for connecting a longitudinal bar to a pedicle screw
EP0885598A2 (fr) 1997-06-16 1998-12-23 Howmedica GmbH Partie de réception pour un élément de retenue d'un implant de colonne vertébrale
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1624817A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9339315B2 (en) 2010-03-08 2016-05-17 Stryker European Holdings I, Llc Bone fixation system with curved profile threads

Also Published As

Publication number Publication date
US20070157543A1 (en) 2007-07-12
DE112004001374D2 (de) 2006-04-13
EP1624817A1 (fr) 2006-02-15
DE20307776U1 (de) 2004-09-23

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