WO1995027444A1 - Implantable intervertebral connector device - Google Patents

Implantable intervertebral connector device Download PDF

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Publication number
WO1995027444A1
WO1995027444A1 PCT/FR1994/000399 FR9400399W WO9527444A1 WO 1995027444 A1 WO1995027444 A1 WO 1995027444A1 FR 9400399 W FR9400399 W FR 9400399W WO 9527444 A1 WO9527444 A1 WO 9527444A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
hemispherical
vertebrae
washer
angular position
Prior art date
Application number
PCT/FR1994/000399
Other languages
French (fr)
Inventor
Albert Alby
Original Assignee
Albert Alby
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
Priority to FR9213928A priority Critical patent/FR2697993B1/en
Application filed by Albert Alby filed Critical Albert Alby
Priority to PCT/FR1994/000399 priority patent/WO1995027444A1/en
Priority to AU65713/94A priority patent/AU6571394A/en
Publication of WO1995027444A1 publication Critical patent/WO1995027444A1/en

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
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7004—Longitudinal elements, e.g. rods with a cross-section which varies along its length
    • A61B17/7007—Parts of the longitudinal elements, e.g. their ends, being specially adapted to fit around the screw or hook heads
    • 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
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
    • A61B17/7023—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a pivot joint
    • 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
    • A61B17/7002—Longitudinal elements, e.g. rods
    • A61B17/7019—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other
    • A61B17/7025—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a sliding joint
    • 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
    • A61B17/84—Fasteners therefor or fasteners being internal fixation devices
    • A61B17/86—Pins or screws or threaded wires; nuts therefor
    • A61B17/8665—Nuts
    • A61B2017/867—Nuts with integral locking or clamping means

Definitions

  • the present invention relates to an implantable device intended to correct a defect in posture or weakening of the vertebrae in patients where the nature of this failure could cause major drawbacks.
  • the system consists of the following elements:
  • connection plate - Clamping nut for adjusting the position of the connection plate - Clamping nut to hold the device in place
  • the pedicle fixing screw (1) shown in FIG. 1 is provided, at its distal part, with a groove (2) which makes it self-tapping. This feature is useful, but not essential. It has, in its upper part, a hexagon (3) above which is a stud-forming part (4). On this part will be placed:
  • This washer is permanently fixed to the screw. It is mobile but not removable. A matting performed in two or three places, on the projection, after placement of the washer will constitute a non-separable Screw / Washer assembly.
  • the connecting plate (7) intended to connect the vertebrae.
  • the hemispherical washer (6) is in the form of a spherical ring. It has an eccentric hole which allows, by rotation of the washer around its axis, to adjust laterally, within the limit of the eccentricity, the position of the plate.
  • the connecting plate (7) is segmented. It can be flat or arched (as shown in FIG 13) as required, have two or three openwork segments or even more. The faces of the plate are symmetrical with respect to its median plane. Each segment has a large slot (8) along which are arranged cups (9) for accommodating the spherical part of the washer (6).
  • the spacing between the successive bowls is determined in order to obtain - by placing the hemispheres in the appropriate bowls - the desired interpedicular spacings.
  • the second hemispherical washer is placed in the corresponding bowl on the opposite side of the connecting plate.
  • the two hemispherical washers, between which the connection plate is thus clamped, make it possible to give it the appropriate angular position before final blocking of the assembly by means of the nut (10).
  • the stacked assembly is shown in FIG. 10.
  • the nut (10) is provided, on its contact face, with slots (11) which ensure, when the nut is screwed in fully, that the latter does not may loosen inappropriately.
  • the plate is connected to one or more damping elements, as illustrated in FIG 11 and 12 of the board 3/3.
  • the device makes it possible to adapt, around an initial position occupied by the pedicle screws, and without any particular delicate manipulation:

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)
  • Prostheses (AREA)

Abstract

An implantable intervertebral connector device for correcting postural defects of the spine in some cases of kyphosis, lordosis, scoliosis or vertebral instability. The device comprises a fixing screw (1) for anchoring in the vertebral pedicles, a connecting plate (7) for rigidly connecting the vertebrae, hemispherical washers (6) for adjusting the angular position of the plate and adapting the distances between the vertebrae, a nut (10) for locking the whole assembly, and one or more shock-absorbing members (12). The device is characterised in that the distance between the vertebrae, the lateral position and the angular position of the connecting plate may be adapted easily during surgery without direct handling and without using instruments of any kind. For this purpose, the plate is specially designed to include oblong holes (8) with suitably spaced recesses (9) arranged along both sides thereof for receiving a hemispherical washer (6). The washer is shaped like a hemispherical ring and comprises an axially eccentric bore. The components of the device are assembled by means of a self-locking nut (10) screwed onto the head of the screw (1). The device comprises one or more shock-absorbing members and the plates may be planar or curved as required.

Description

DISPOSITIF DE LIAISON INTERVERTEBRAL IMPLANTABLE IMPLANTABLE INTERVERTEBRAL CONNECTION DEVICE
La présente invention concerne un dispositif implantable destiné à corriger un défaut de posture ou d'affaiblissement de vertèbres chez des patients où la nature de cette défaillance pourrait entraîner des inconvénients majeurs.The present invention relates to an implantable device intended to correct a defect in posture or weakening of the vertebrae in patients where the nature of this failure could cause major drawbacks.
Il peut s'agir, la plupart du temps, de cas de Cyphoses, de Lordoses, de Scolioses ou d'Instabilités vertébrales. On parvient à corriger le défaut de posture en solidarisant la ou les vertèbres déficientes à leurs voisines, et en rétablissant l'espace anatomique, permettant le libre passage des racines nerveuses.Most of the time it may be a case of Cyphosis, Lordosis, Scoliosis or Vertebral instabilities. We manage to correct the posture defect by joining the defective vertebra (s) to their neighbors, and by restoring the anatomical space, allowing the free passage of the nerve roots.
Il est proposé, avec le dispositif de cette invention, d'apporter aux praticiens un ensemble dont la mise en place ne nécessitera pas de réglages, d'adaptation ou de cintrage au moment de l'implantation. Il est clair que de telles manipulations sont toujours délicates à faire à ce moment là. Le dispositif se compose des éléments suivants :It is proposed, with the device of this invention, to provide practitioners with an assembly whose implementation will not require adjustments, adaptation or bending at the time of implantation. It is clear that such manipulations are always difficult to do at this time. The system consists of the following elements:
- Vis de fixation destinée à l'ancrage dans les pédicules vertébraux- Fixing screw for anchoring in the vertebral pedicles
- Plaque de liaison permettant la solidarisation des vertèbres- Connection plate allowing the vertebrae to join
- Rondelles hémisphériques destinées au réglage de la position de la plaque de liaison - Ecrou de serrage pour le maintien du dispositif en place- Hemispherical washers for adjusting the position of the connection plate - Clamping nut to hold the device in place
Les caractéristiques du dispositif ressortent de la description qui en est faite ci-dessous. La vis de fixation pediculaire (1) représentée en figure 1 est pourvue, à sa partie distale, d'une saignée (2) qui la rend autotaraudeuse. Cette caractéristique est utile, mais non indispensable. Elle comporte, dans sa partie haute, un six pans (3) au-dessus duquel se trouve une partie formant goujon (4). Sur cette partie seront placés :The characteristics of the device appear from the description given below. The pedicle fixing screw (1) shown in FIG. 1 is provided, at its distal part, with a groove (2) which makes it self-tapping. This feature is useful, but not essential. It has, in its upper part, a hexagon (3) above which is a stud-forming part (4). On this part will be placed:
- Une première rondelle hémisphérique (6) maintenue en place par emmanchement forcé sur la saillie (5).- A first hemispherical washer (6) held in place by forced fitting on the projection (5).
Cette rondelle est fixée à demeure sur la vis. Elle est mobile mais non amovible. Un matage pratiqué en deux ou trois endroits, sur la saillie, après placement de la rondelle constituera un ensemble Vis / Rondelle non séparable.This washer is permanently fixed to the screw. It is mobile but not removable. A matting performed in two or three places, on the projection, after placement of the washer will constitute a non-separable Screw / Washer assembly.
- La plaque de liaison (7) destinée à relier les vertèbres.- The connecting plate (7) intended to connect the vertebrae.
- Une deuxième rondelle hémisphérique identique à la précédente.- A second hemispherical washer identical to the previous one.
- Un écrou (10) destiné à enserrer l'empilage ainsi constitué et à solidariser le dispositif. La rondelle hémisphérique (6) est en forme d'anneau sphérique. Elle comporte un perçage excentré qui permet, par rotation de la rondelle autour de son axe, de régler latéralement, dans la limite de l'excentrement, la position de la plaque. La plaque de liaison (7) est segmentée. Elle peut être plane ou cambrée (comme représentée en FIG 13) selon les besoins, comporter deux ou trois segments ajourés ou même plus. Les faces de la plaque sont symétriques par rapport à son plan médian. Chaque segment comporte une large fente (8) le long duquel sont aménagées des cuvettes (9) permettant de loger la partie sphérique de la rondelle (6).- A nut (10) intended to enclose the stack thus formed and to secure the device. The hemispherical washer (6) is in the form of a spherical ring. It has an eccentric hole which allows, by rotation of the washer around its axis, to adjust laterally, within the limit of the eccentricity, the position of the plate. The connecting plate (7) is segmented. It can be flat or arched (as shown in FIG 13) as required, have two or three openwork segments or even more. The faces of the plate are symmetrical with respect to its median plane. Each segment has a large slot (8) along which are arranged cups (9) for accommodating the spherical part of the washer (6).
L'espacement entre les cuvettes successives est déterminé pour permettre d'obtenir - en plaçant les hémisphères dans les cuvettes appropriées - les écartements interpédiculaires souhaités.The spacing between the successive bowls is determined in order to obtain - by placing the hemispheres in the appropriate bowls - the desired interpedicular spacings.
La deuxième rondelle hémisphérique est placée dans la cuvette correspondante sur la face opposée de la plaque de liaison. Les deux rondelles hémisphériques, entre lesquelles est ainsi enserrée la plaque de liaison, permettent de lui donner la position angulaire convenable avant blocage final de l'ensemble au moyen de l'ecrou (10).The second hemispherical washer is placed in the corresponding bowl on the opposite side of the connecting plate. The two hemispherical washers, between which the connection plate is thus clamped, make it possible to give it the appropriate angular position before final blocking of the assembly by means of the nut (10).
L'ensemble, empilé, est présenté sur la figure 10. L'ecrou (10) est pourvu, à sa face de contact, de créneaux (11 ) qui assurent, lorsque l'ecrou est vissé à fond, que celui-ci ne puisse se desserrer inopportunément.The stacked assembly is shown in FIG. 10. The nut (10) is provided, on its contact face, with slots (11) which ensure, when the nut is screwed in fully, that the latter does not may loosen inappropriately.
La plaque est raccordée à un ou plusieurs éléments amortisseurs, comme illustré en FIG 11 et 12 de la planche 3/3.The plate is connected to one or more damping elements, as illustrated in FIG 11 and 12 of the board 3/3.
Ainsi le dispositif permet d'adapter, autour d'une position initiale occupée par les vis pédiculaires, et sans aucune manipulation délicate particulière :Thus, the device makes it possible to adapt, around an initial position occupied by the pedicle screws, and without any particular delicate manipulation:
- La distance interpédiculaire, le placement latéral, la position angulaire de la plaque de liaison. - Interpedicular distance, lateral placement, angular position of the connecting plate.

Claims

REVENDICATIONS
1) Dispositif de liaison intervertébral, permettant d'adapter aisément, en cours d'intervention, la distance intervertébrale, la position latérale et angulaire de la plaque de liaison, par rapport aux vis pediculaires, caractérisé en ce qu'il est constitué de plaques de liaison (7) réalisées en 2 segments (8) ou plus, chaque segment comportant un trou oblong le long duquel sont ménagées des cuvettes (9) pour loger des rondelles hémisphériques permettant le calage du dispositif sur les vis.1) Intervertebral connection device, making it possible to easily adapt, during intervention, the intervertebral distance, the lateral and angular position of the connection plate, with respect to the pedicle screws, characterized in that it consists of plates connecting (7) made in 2 or more segments (8), each segment having an oblong hole along which are provided bowls (9) for housing hemispherical washers allowing the device to be fixed on the screws.
2) Dispositif selon revendication 1 , caractérisé en ce que les rondelles hémisphériques (6) ont un perçage excentré par rapport à leur axe, qu'elles sont placées de manière conjuguée de part et d'autre de la plaque de liaison de manière à permettre le calage de la distance interver¬ tébrale ainsi que la position angulaire et latérale de la plaque.2) Device according to claim 1, characterized in that the hemispherical washers (6) have an eccentric bore relative to their axis, that they are placed in a conjugate manner on either side of the connection plate so as to allow the setting of the intervertebral distance as well as the angular and lateral position of the plate.
3) Dispositif selon revendications 1 et 2, caractérisé en ce que ses éléments sont réalisées en alliage de titane ou matériau équivalent dont les propriétés amagnétiques n'engendrent pas d'artefacts lors d'examens à l'IRM ou au scanner.3) Device according to claims 1 and 2, characterized in that its elements are made of titanium alloy or equivalent material whose non-magnetic properties do not generate artifacts during MRI or scanner examinations.
4) Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que la plaque est équipée ou constituée d'un ou plusieurs éléments amortisseurs (12) selon besoin. 4) Device according to any one of the preceding claims, characterized in that the plate is equipped or made up of one or more damping elements (12) as required.
PCT/FR1994/000399 1992-11-18 1994-04-08 Implantable intervertebral connector device WO1995027444A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR9213928A FR2697993B1 (en) 1992-11-18 1992-11-18 Implantable Intervertebral Connection Device.
PCT/FR1994/000399 WO1995027444A1 (en) 1992-11-18 1994-04-08 Implantable intervertebral connector device
AU65713/94A AU6571394A (en) 1992-11-18 1994-04-08 Implantable intervertebral connector device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9213928A FR2697993B1 (en) 1992-11-18 1992-11-18 Implantable Intervertebral Connection Device.
PCT/FR1994/000399 WO1995027444A1 (en) 1992-11-18 1994-04-08 Implantable intervertebral connector device

Publications (1)

Publication Number Publication Date
WO1995027444A1 true WO1995027444A1 (en) 1995-10-19

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ID=9435710

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR1994/000399 WO1995027444A1 (en) 1992-11-18 1994-04-08 Implantable intervertebral connector device

Country Status (3)

Country Link
AU (1) AU6571394A (en)
FR (1) FR2697993B1 (en)
WO (1) WO1995027444A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004000147A1 (en) * 2002-06-24 2003-12-31 Bernhard Brinkhaus Spinal column support system

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2758971B1 (en) 1997-01-31 1999-06-25 Albert P Alby INTERVERTEBRAL PEDICULAR CONNECTION DEVICE
FR2771280B1 (en) * 1997-11-26 2001-01-26 Albert P Alby RESILIENT VERTEBRAL CONNECTION DEVICE
US6669697B1 (en) 1998-09-25 2003-12-30 Perumala Corporation Self-retaining bolt for internal spinal stabilizers
US6355038B1 (en) 1998-09-25 2002-03-12 Perumala Corporation Multi-axis internal spinal fixation
FR2790941B1 (en) * 1999-03-16 2001-06-08 Materiel Orthopedique En Abreg INSTRUMENTATION OF RACHIDIAN OSTEOSYNTHESIS WITH PLATE AND PEDICULAR SCREW OR TRANSVERSE CONNECTOR BETWEEN A VERTEBRAL ROD AND A PEDICULAR SCREW
FR2815535B1 (en) * 2000-10-23 2003-01-24 Patrice Moreau PEDICULAR IMPLANT
FR2831049B1 (en) 2001-10-18 2004-08-13 Ldr Medical PLATE FOR OSTEOSYNTHESIS DEVICE AND PRE-ASSEMBLY METHOD
FR2831048B1 (en) 2001-10-18 2004-09-17 Ldr Medical PROGRESSIVE APPROACH OSTEOSYNTHESIS DEVICE AND PRE-ASSEMBLY PROCESS
FR2833151B1 (en) 2001-12-12 2004-09-17 Ldr Medical BONE ANCHORING IMPLANT WITH POLYAXIAL HEAD
FR2855041B1 (en) * 2003-05-23 2006-02-24 Hassan Razian PLATE FOR OSTEOSYNTHESIS SYSTEM
FR2859095B1 (en) 2003-09-01 2006-05-12 Ldr Medical BONE ANCHORING IMPLANT WITH A POLYAXIAL HEAD AND METHOD OF PLACING THE IMPLANT
FR2916956B1 (en) 2007-06-08 2012-12-14 Ldr Medical INTERSOMATIC CAGE, INTERVERTEBRAL PROSTHESIS, ANCHORING DEVICE AND IMPLANTATION INSTRUMENTATION

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4836196A (en) * 1988-01-11 1989-06-06 Acromed Corporation Surgically implantable spinal correction system
EP0516567A1 (en) * 1991-05-30 1992-12-02 Société dite: "PSI" Shock-absorbing device for intervertebral stabilisation
EP0576379A1 (en) * 1992-06-25 1993-12-29 Psi Use of dampers with improved damping at the end of stroke in a device for intervertebral stabilisation
EP0582857A1 (en) * 1992-08-12 1994-02-16 Synthes AG, Chur Spinal fixation element

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3923995A1 (en) * 1989-07-20 1991-01-31 Lutz Biedermann BONE STABILIZING ELEMENT
FR2674118B1 (en) * 1991-03-19 1998-02-20 Benoit Girard Cie Sa SPINAL OSTEOSYNTHESIS DEVICE.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4836196A (en) * 1988-01-11 1989-06-06 Acromed Corporation Surgically implantable spinal correction system
EP0516567A1 (en) * 1991-05-30 1992-12-02 Société dite: "PSI" Shock-absorbing device for intervertebral stabilisation
EP0576379A1 (en) * 1992-06-25 1993-12-29 Psi Use of dampers with improved damping at the end of stroke in a device for intervertebral stabilisation
EP0582857A1 (en) * 1992-08-12 1994-02-16 Synthes AG, Chur Spinal fixation element

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004000147A1 (en) * 2002-06-24 2003-12-31 Bernhard Brinkhaus Spinal column support system

Also Published As

Publication number Publication date
AU6571394A (en) 1995-10-30
FR2697993A1 (en) 1994-05-20
FR2697993B1 (en) 1996-10-11

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