WO2011114013A1 - Dynamic tripodal intervertebral prosthesis provided with shock absorption - Google Patents

Dynamic tripodal intervertebral prosthesis provided with shock absorption Download PDF

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Publication number
WO2011114013A1
WO2011114013A1 PCT/FR2011/000125 FR2011000125W WO2011114013A1 WO 2011114013 A1 WO2011114013 A1 WO 2011114013A1 FR 2011000125 W FR2011000125 W FR 2011000125W WO 2011114013 A1 WO2011114013 A1 WO 2011114013A1
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WO
WIPO (PCT)
Prior art keywords
dynamic
prosthesis
intervertebral
housing
piston
Prior art date
Application number
PCT/FR2011/000125
Other languages
French (fr)
Inventor
Frédéric Fortin
Johann Robin
Brice Sennequier
Original Assignee
Biospine Implants
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 Biospine Implants filed Critical Biospine Implants
Priority to EP11714797A priority Critical patent/EP2563282A1/en
Publication of WO2011114013A1 publication Critical patent/WO2011114013A1/en

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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, 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
    • A61B17/70—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
    • 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
    • A61B17/7011—Longitudinal element being non-straight, e.g. curved, angled or branched
    • 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
    • A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/4405—Joints for the spine, e.g. vertebrae, spinal discs for apophyseal or facet joints, i.e. between adjacent spinous or transverse processes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2/442—Intervertebral or spinal discs, e.g. resilient
    • 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
    • A61B17/7008—Longitudinal elements, e.g. rods with a cross-section which varies along its length with parts of, or attached to, the longitudinal elements, bearing against an outside of the screw or hook heads, e.g. nuts on threaded rods
    • 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
    • A61B17/7031—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other made wholly or partly of flexible material
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30108—Shapes
    • A61F2002/3011—Cross-sections or two-dimensional shapes
    • A61F2002/30112—Rounded shapes, e.g. with rounded corners
    • A61F2002/30133—Rounded shapes, e.g. with rounded corners kidney-shaped or bean-shaped
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30563—Special structural features of bone or joint prostheses not otherwise provided for having elastic means or damping means, different from springs, e.g. including an elastomeric core or shock absorbers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30601—Special structural features of bone or joint prostheses not otherwise provided for telescopic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30879—Ribs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
    • A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
    • A61F2002/30878—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
    • A61F2002/30891—Plurality of protrusions
    • A61F2002/30892—Plurality of protrusions parallel
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/44—Joints for the spine, e.g. vertebrae, spinal discs
    • A61F2002/448—Joints for the spine, e.g. vertebrae, spinal discs comprising multiple adjacent spinal implants within the same intervertebral space or within the same vertebra, e.g. comprising two adjacent spinal implants

Definitions

  • the invention relates to an intervertebral stabilization device composed of simple elements which, together with each other, will form a tripod prosthesis, relying on at least three dynamic supports, arranged in the form of a triangle in the intervertebral space.
  • the problem of the treatment of the intervertebral disk is only partially solved by disk prostheses which certainly allow a tilt around a central core but do not restore the damping properties of a healthy disk.
  • the present invention will solve the problem of three-point dynamic stability, in particular using a device of the modified prior art, combined with other new devices.
  • a dynamic posterior stabilization device combining rigid means and viscoelastic means housed in a hood which itself comprises:
  • a movable piston rod having a piston head at its end - a viscoelastic damper block having a convex face
  • a viscoelastic ring housed without prestressing with optimized clearances inside the cover enclosing the viscoelastic means, these means enabling the device to form an angle, even in a neutral position between its two fastening elements to the pedi nal screws, and exert a permanent elastic return force around this position, damping the compression and bending forces applied to the pedicle screws.
  • transverse rods added integrally to the device of the prior art which make it a new device.
  • Figure 1 plate 1/7 view of a dynamic posterior stabilization device alone
  • Figure 2 plate 1/7 view of a mechanical connector of a polyaxial connection.
  • Figure 3 2/7 general view of the new prosthesis composed of the means of the prior art combined with new links and a support device.
  • Figure 4 board 2/7 exploded view of the new prosthesis composed of the means of the prior art combined with new links and the prior support device.
  • Figure 5 plate 3/7 perspective view of the anterior support means.
  • Figure 6 plate 3/7 vertical sectional view of the anterior support means.
  • Figure 7 plate 3/7 perspective view of the new dynamic stabilization device having a perpendicular connection.
  • Figure 8 plate 3/7 sectional view of the new dynamic stabilization device with its perpendicular connection.
  • FIG. 10 plate 4/7 partial sectional view of an intervertebral joint where we see the new tripod prosthesis implanted in the intervertebral space.
  • Figure 1 1 plate 5/7 partial sectional view of a vertebra where we see the new tripod prosthesis, implanted with its three points of support working in compression
  • Figure 12 plate 5/7 partial section view of a vertebra where we see the new prosthetic tripod implanted on its three points of support working in flexion
  • Figure 15 plate 6/7 posterior view of a vertebra where we can see the new tripod prosthesis implanted on its three support points working in left lateral flexion
  • Figure 18 board 7/7 isometric view of a variant of the first version with new means of previous support.
  • Figure 19 board 7/7 isometric view of a variant of the first version comprising the new support means the new tripod prosthesis being inserted into the intervertebral space.
  • the dynamic tripodic intervertebral prosthesis 1 provided with at least one shock absorber consists of:
  • this device 2 consists of: a housing 10 composed of a lower plate 1 1 which has anchoring means 142 for fixing said housing 10 to the first vertebra, the lower plate 1 1 being rigidly connected to an enclosure having a top orifice preferably frustoconical 100
  • a movable plate 14 connected to a piston 140 by a sliding rod 141.
  • This movable plate 14 is provided on its upper face with anchoring means on the upper vertebra such as a toothing 142 or ridges 143
  • a viscoelastic block 13 situated between the inner face 1 1 of the housing 12 and the lower face of the piston 140, making it possible to damp the intervertebral mechanical stresses, said block 13 having a shape matching that of the enclosure 10 with games located in specific places.
  • the first set J1 is between the piston 140 and the inner walls of the housing 10
  • the second set J2 is located between the sliding rod 141 and the frustoconical upper orifice 100.
  • J1 and J2 allow the piston 140 to slide without friction, during dynamic stresses that can be:
  • the third set J3 is located between the viscoelastic means 13 (FIG. 6) and the internal walls of the casing 10; it allows frictionless deformation between the walls of the housing 10 of said viscoelastic means 1 3, whatever the level and the type of stresses applied to the piston 140.
  • the viscoelastic block 13 has a convex lower surface 130 which allows it to fit and self center in a concavity 1 10 of the lower plate 1 1.
  • -de two devices 3 to ensure the other two bearing surfaces with damping .
  • These two devices 3 comprise a transverse rod Ta integrated in the body of the device 3.
  • These transverse rods Ta are trapped in a connection Cm (FIG. 3) which blocks one end of said rod Ta with the aid of a clamping plug, .
  • These devices 4 connect each device 3 to the device 2.
  • the link Lm is attached to one end of the device 2 while the connector Cm is attached to the rod Ta of the device 3.
  • the connections of the devices 3 to the device 2 guarantee the stability and the holding in position of the elements provided with dampers; they ensure the maintenance of the device 2 in the anterior intervertebral space by preventing in particular its expulsion
  • This new assembly having three bearing surfaces arranged in a triangle (FIG. 9), each having damping properties and a controlled mobility, connected to one another by mechanical links, makes it possible, by a combination of means, to ensure its stability in the intervertebral space, thus constitutes the dynamic tripod prosthesis 1.
  • the dynamic tripodic intervertebral prosthesis provided with a damping comprises two subsets 5a and 5b, each of them being formed:
  • Each device 2a or 2b is different from the device 2 of the first embodiment by its rectilinear shape instead of curvilinear, it has a contact surface very close to that of the device 2, which doubles the surface area. previous support of this new prosthesis consisting of two subsets 5a and 5b.
  • This new assembly therefore has a larger anterior bearing surface, by doubling its contact surface.
  • the anterior part of the prosthesis inserted between the vertebral bodies reinforces the stability and the anchoring of this new prosthesis 1 in the intervertebral space; it brings improved mechanical characteristics concerning in particular its capacity of damping and its resistance to the stresses.

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Neurology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • Molecular Biology (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Prostheses (AREA)

Abstract

The invention relates to a dynamic tripodal intervertebral prosthesis (1) provided with shock absorption, which rests on three surfaces positioned at the apex of a triangle, each bearing surface being provided with at least one shock absorber is connected to another bearing surface by means of a device (4) consisting of a connection (Lm) and a connector (Cm), which makes it possible to support and absorb the mechanical loads by controlling the intervertebral movements.

Description

Prothèse intervertébrale tripode dynamique pourvue d'un amortissement  Dynamic three-dimensional intervertebral prosthesis with damping
DOMAINE DE L'INVENTION FIELD OF THE INVENTION
L'invention concerne un dispositif de stabilisation intervertébrale composé d'éléments simples qui combinés entre eux, vont former une prothèse tripode, s 'appuyant sur au moins trois appuis dynamiques, disposés en forme de triangle dans l'espace intervertébral The invention relates to an intervertebral stabilization device composed of simple elements which, together with each other, will form a tripod prosthesis, relying on at least three dynamic supports, arranged in the form of a triangle in the intervertebral space.
ART ANTERIEUR PRIOR ART
On connaît de nombreux systèmes de fixations vertébrales postérieures rigidifiant l'espace intervertébral d'un certain nombre de vertèbres en les privant de toute mobilité pour permettre de traiter la plupart des pathologies du rachis. Cependant, la première vertèbre adjacente à ce bloc rigide garde toute sa mobilité et cette discontinuité brutale entre le bloc rigide et cette vertèbre libre engendre très souvent une hyper sollicitation des éléments de liaison. Il s'en suit une accélération de la dégénérescence à ce niveau. Many posterior vertebral fixation systems are known to stiffen the intervertebral space of a certain number of vertebrae by depriving them of all mobility in order to treat most of the pathologies of the spine. However, the first vertebra adjacent to this rigid block retains all its mobility and this sudden discontinuity between the rigid block and this free vertebra very often generates a hyper-stressing of the connecting elements. It follows an acceleration of degeneration at this level.
C'est pourquoi, il devient essentiel de pouvoir traiter l 'espace intervertébral sans le bloquer, pour éviter de générer ce problème.  Therefore, it becomes essential to be able to treat the intervertebral space without blocking it, to avoid generating this problem.
Cette difficulté n'a été que très partiellement résolue par des systèmes semi-rigides conçus pour créer une semi mobilité sur la partie postérieure des vertèbres. Ces systèmes présentent les inconvénients suivants :  This difficulty has only been partially solved by semi-rigid systems designed to create a semi mobility on the posterior part of the vertebrae. These systems have the following drawbacks:
- soient ils travaillent uniquement en traction. C'est le cas de tous les dispositifs basés sur les ligaments artificiels. Ces systèmes sont peu élastiques et laissent à l'appréciation de l 'opérateur le soin de régler la tension rendant ainsi aléatoire les caractéristiques mécaniques, en particulier dans le mode de fonctionnement traction compression qui nous concerne le plus souvent.  - they work only in tension. This is the case of all devices based on artificial ligaments. These systems are not elastic and leave the discretion of the operator to adjust the voltage thus making the mechanical characteristics random, especially in the traction compression mode of operation which concerns us most often.
- soient ils travaillent en compression pure avec le plus souvent la présence d'une butée en traction, ce qui rend ces dispositifs inefficaces dés qu'ils doivent assister des déplacements en flexion.  - Or they work in pure compression with the most often the presence of a stop in tension, which makes these devices ineffective as soon as they have to assist movements in flexion.
De même, le problème du traitement du disque intervertébral, n'est que partiellement résolu par les prothèses de disque qui autorisent certes un basculement autour d'un noyau central mais qui ne restituent pas les propriétés d'amortissement d'un disque sain. La présente invention va résoudre le problème de la stabilité dynamique en trois points, en utilisant notamment un dispositif de l 'art antérieur modifié, combiné avec d'autres dispositifs nouveaux.  Similarly, the problem of the treatment of the intervertebral disk is only partially solved by disk prostheses which certainly allow a tilt around a central core but do not restore the damping properties of a healthy disk. The present invention will solve the problem of three-point dynamic stability, in particular using a device of the modified prior art, combined with other new devices.
Ce premier dispositif de l 'art antérieur comprenait : - un dispositif de stabilisation postérieur dynamique combinant des moyens rigides et des moyens viscoélastiques logés dans un capot qui lui- même comprend : This first device of the prior art included: a dynamic posterior stabilization device combining rigid means and viscoelastic means housed in a hood which itself comprises:
- une tige piston mobile comportant une tête de piston à son extrémité - un bloc amortisseur viscoélastique possédant une face convexe  - a movable piston rod having a piston head at its end - a viscoelastic damper block having a convex face
- une tige fixe faisant un angle par rapport à l 'axe d'un capot qui comporte à son extrémité une surface concave qui épouse parfaitement la face convexe du bloc amortisseur viscoélastique  - A fixed rod at an angle relative to the axis of a hood which has at its end a concave surface which perfectly matches the convex face of the viscoelastic damper block
- un anneau viscoélastique logé sans précontrainte avec des jeux optimisés à l'intérieur du capot renfermant les moyens viscoélastiques, ces moyens permettant au dispositif de former un angle, même en position neutre entre ses deux éléments de fixation aux vis pédi cul aires, et d'exercer un effort de rappel élastique permanent autour de cette position, en amortissant les efforts de compression et de flexion appliqués sur les vis pédiculaires.  a viscoelastic ring housed without prestressing with optimized clearances inside the cover enclosing the viscoelastic means, these means enabling the device to form an angle, even in a neutral position between its two fastening elements to the pedi nal screws, and exert a permanent elastic return force around this position, damping the compression and bending forces applied to the pedicle screws.
Outre ce dispositif stabilisateur postérieur dynamique de l 'art antérieur, situé au niveau de chacune des facettes articulaires, de nouveaux dispositifs ont été ajoutés:  In addition to this dynamic posterior stabilizing device of the prior art, located at each of the facet joints, new devices have been added:
- un nouveau dispositif d'appui avec amortisseur de forme curviligne placé sur la partie antérieure de la vertèbre  - a new support device with curvilinear damper placed on the anterior part of the vertebra
- de nouvelles liaisons reliées semi-rigides placées entre les points d'appui  - new semi-rigid connected links placed between the points of support
- des tiges transversales rajoutées solidairement au dispositif de l'art antérieur qui en font un dispositif nouveau.  transverse rods added integrally to the device of the prior art which make it a new device.
L'ensemble de ces différents dispositifs interdépendants, forment en se combinant entre eux une nouvelle prothèse intervertébrale tripode, dynamique et comportant un amortissement.  All these different interdependent devices, form in combination with each other a new tripod intervertebral prosthesis, dynamic and having a damping.
Les figures servant à la compréhension de l'invention sont : Pour l 'Art Antérieur The figures used to understand the invention are: For the prior art
Figure 1 planche 1/7 : vue d'un dispositif de stabilisation postérieur dynamique seul  Figure 1 plate 1/7: view of a dynamic posterior stabilization device alone
Figure 2 planche 1/7 :vue d'un connecteur mécanique d'une liaison polyaxiale.  Figure 2 plate 1/7: view of a mechanical connector of a polyaxial connection.
Pour les Figures objet de la présente invention For the Figures Object of the Present Invention
Figure 3 planche 2/7 vue générale de la nouvelle prothèse composée des moyens de l 'art antérieur combinés avec des liaisons nouvelles et un dispositif d'appui.  Figure 3: 2/7 general view of the new prosthesis composed of the means of the prior art combined with new links and a support device.
Figure 4 planche 2/7 :vue éclatée de la nouvelle prothèse composée des moyens de l'art antérieur combinés avec des liaisons nouvelles et du dispositif d'appui antérieur. Figure 4 board 2/7: exploded view of the new prosthesis composed of the means of the prior art combined with new links and the prior support device.
Figure 5 planche 3/7 : vue en perspective du moyen d'appui antérieur. Figure 6 planche 3/7 : vue en coupe verticale du moyen d'appui antérieur. Figure 7 planche 3/7 :vue en perspective du nouveau dispositif de stabilisation dynamique comportant une liaison perpendiculaire. Figure 5 plate 3/7: perspective view of the anterior support means. Figure 6 plate 3/7: vertical sectional view of the anterior support means. Figure 7 plate 3/7: perspective view of the new dynamic stabilization device having a perpendicular connection.
Figure 8 planche 3/7 vue en coupe du nouveau dispositif de stabilisation dynamique avec sa liaison perpendiculaire. Figure 8 plate 3/7 sectional view of the new dynamic stabilization device with its perpendicular connection.
Figure 9 planche 4/7 vue d'une vertèbre ou l 'on montre les trois points d'appui de la nouvelle prothèse tripode objet de l'invention.  Figure 9 board 4/7 view of a vertebra where we show the three points of support of the new tripod prosthesis object of the invention.
Figure 10 planche 4/7 vue en coupe partielle d'une articulation intervertébrale ou l 'on voit la nouvelle prothèse tripode implantée dans l'espace intervertébral. Figure 10 plate 4/7 partial sectional view of an intervertebral joint where we see the new tripod prosthesis implanted in the intervertebral space.
Figure 1 1 planche 5/7 vue en coupe partielle d'une vertèbre ou l 'on voit la nouvelle prothèse tripode, implantée avec ses trois des points d'appui travaillant en compression  Figure 1 1 plate 5/7 partial sectional view of a vertebra where we see the new tripod prosthesis, implanted with its three points of support working in compression
Figure 12 planche 5/7 vue en coupe partielle d'une vertèbre ou l'on voit la nouvelle prothèse tripode implantée sur ses trois des points d'appui travaillant en flexion  Figure 12 plate 5/7 partial section view of a vertebra where we see the new prosthetic tripod implanted on its three points of support working in flexion
Figure 13 planche 5/7 vue en coupe partielle d'une vertèbre ou l 'on voit la nouvelle prothèse tripode implantée.  Figure 13 board 5/7 partial sectional view of a vertebra where we can see the new implanted tripod prosthesis.
Figure 14 planche 6/7 vue postérieure d'une vertèbre ou l 'on ' voit la nouvelle prothèse tripode implantée sur ses trois des points d'appui l'ensemble étant au repos  Figure 14 board 6/7 posterior view of a vertebra where we see the new prosthesis tripod implanted on its three points of support together being at rest
Figure 15 planche 6/7 vue postérieure d'une vertèbre ou l 'on voit la nouvelle prothèse tripode implantée sur ses trois des points d'appui travaillant en flexion latérale gauche  Figure 15 plate 6/7 posterior view of a vertebra where we can see the new tripod prosthesis implanted on its three support points working in left lateral flexion
Figure 16 planche 6/7 vue postérieure d'une vertèbre ou l'on voit la nouvelle prothèse tripode implantée sur ses trois des points d'appui travaillant en flexion latérale droite Figure 16 plate 6/7 posterior view of a vertebra where we see the new tripod prosthesis implanted on its three support points working in right lateral flexion
Figure 17 planche 7/7 vue en coupe d'une autre variante du dispositif d'appui antérieur  Figure 17 7/7 sectional view of another variant of the anterior support device
Figure 18 planche 7/7 vue isométrique d'une variante de la première version comportant de nouveaux moyens d'appui antérieur. Figure 18 board 7/7 isometric view of a variant of the first version with new means of previous support.
Figure 19 planche 7/7 vue isométrique d'une variante de la première version comportant les nouveaux moyens d'appui la nouvelle prothèse tripode étant inséré dans l'espace intervertébral. Figure 19 board 7/7 isometric view of a variant of the first version comprising the new support means the new tripod prosthesis being inserted into the intervertebral space.
Dans une première forme de réalisation (figures de 3 à 16) In a first embodiment (figures 3 to 16)
La prothèse intervertébrale tripode dynamique 1 pourvue au moins d'un amortisseur est constituée : The dynamic tripodic intervertebral prosthesis 1 provided with at least one shock absorber consists of:
- d'un premier dispositif 2 de forme curviligne permettant d'assurer une première surface d'appui avec amortissement (figure 5 et 6), ce dispositif 2 est constitué : -d'un boîtier 10 composé d'un plateau inférieur 1 1 qui présente des moyens d'ancrage 142 permettant de fixer ledit boîtier 10 sur la première vertèbre, le plateau inférieur 1 1 étant lié rigidement à une enceinte comportant une orifice supérieure de préférence tronconique 100 a first device 2 of curvilinear shape making it possible to ensure a first bearing surface with damping (FIGS. 5 and 6), this device 2 consists of: a housing 10 composed of a lower plate 1 1 which has anchoring means 142 for fixing said housing 10 to the first vertebra, the lower plate 1 1 being rigidly connected to an enclosure having a top orifice preferably frustoconical 100
- d'un plateau mobile 14, relié à un piston 140 par une tige coulissante 141 . Ce plateau mobile 14 est pourvu sur sa face supérieure de moyens d'ancrage sur la vertèbre supérieure tels qu'une denture 142 ou des crêtes saillantes 143 - A movable plate 14, connected to a piston 140 by a sliding rod 141. This movable plate 14 is provided on its upper face with anchoring means on the upper vertebra such as a toothing 142 or ridges 143
- d'un pavé viscoélastique 13, situé entre la face interne 1 1 du boîtier 12 et la face inférieure du piston 140, permettant d'amortir les sollicitations mécaniques intervertébrales, ledit pavé 13 présentant une forme épousant celle de l'enceinte 10 avec des jeux situés à des endroits précis.  a viscoelastic block 13 situated between the inner face 1 1 of the housing 12 and the lower face of the piston 140, making it possible to damp the intervertebral mechanical stresses, said block 13 having a shape matching that of the enclosure 10 with games located in specific places.
Le premier jeu Jl se situe entre le piston 140 et les parois internes du boîtier 10  The first set J1 is between the piston 140 and the inner walls of the housing 10
Le deuxième jeu J2 se situe entre la tige coulissante 141 et l'orifice supérieur tronconique 100. The second set J2 is located between the sliding rod 141 and the frustoconical upper orifice 100.
La combinaison de Jl et J2 permet au piston 140 de coulisser sans frottement, lors des sollicitations dynamiques qui peuvent être :  The combination of J1 and J2 allows the piston 140 to slide without friction, during dynamic stresses that can be:
-de la traction compression ( figures 10 et 1 1 )  pulling compression (FIGS. 10 and 11)
-de la flexion extension (figures 12 et 1 3)  flexion extension (FIGS. 12 and 13)
-de la flexion latérale ( figures 14 et 1 5)  lateral bending (FIGS. 14 and 15)
Le troisième jeu J3 se situe entre le moyen viscoélastique 13 (figure 6) et les parois internes du boîtier 10 ; il permet une déformation sans frottement entre les parois du boîtier 10 dudit moyen viscoélastique 1 3, ceci quelque que soit le niveau et le type de sollicitations appliquées sur le piston 140 .  The third set J3 is located between the viscoelastic means 13 (FIG. 6) and the internal walls of the casing 10; it allows frictionless deformation between the walls of the housing 10 of said viscoelastic means 1 3, whatever the level and the type of stresses applied to the piston 140.
Le bloc viscoélastique 13 présente une surface inférieure convexe 130 qui lui permet de loger et de s'auto centrer dans une concavité 1 10 du plateau inférieur 1 1. -de deux dispositifs 3 permettant d'assurer les deux autres surfaces d'appui avec amortissement. Ces deux dispositifs 3 comportent une tige transversale Ta intégrée au corps du dispositif 3. Ces tiges transversales Ta sont prisonnières d'une connexion Cm (figure 3) qui bloque une extrémité de ladite tige Ta à l'aide d'un bouchon de serrage,.  The viscoelastic block 13 has a convex lower surface 130 which allows it to fit and self center in a concavity 1 10 of the lower plate 1 1. -de two devices 3 to ensure the other two bearing surfaces with damping . These two devices 3 comprise a transverse rod Ta integrated in the body of the device 3. These transverse rods Ta are trapped in a connection Cm (FIG. 3) which blocks one end of said rod Ta with the aid of a clamping plug, .
- de deux dispositifs 4 formés d'une liaison mécanique Lm cintrable ou flexible et d'un connecteur Cm multiaxial  two devices 4 formed of a flexible or flexible Lm mechanical connection and a multiaxial Cm connector
Ces dispositifs 4 relient chaque dispositif 3 au dispositif 2. La liaison Lm est fixée à une extrémité du dispositif 2 tandis que le connecteur Cm est fixé à la tige Ta du dispositif 3. Les liaisons des dispositifs 3 au dispositif 2 garantissent la stabilité et le maintien en position des éléments pourvus d'amortisseur ; elles assurent le maintien du dispositif 2 dans l'espace intervertébral antérieur en empêchant notamment son expulsion These devices 4 connect each device 3 to the device 2. The link Lm is attached to one end of the device 2 while the connector Cm is attached to the rod Ta of the device 3. The connections of the devices 3 to the device 2 guarantee the stability and the holding in position of the elements provided with dampers; they ensure the maintenance of the device 2 in the anterior intervertebral space by preventing in particular its expulsion
Ce nouvel assemblage présentant trois surfaces d'appui disposées en triangle (figure 9), ayant chacune des propriétés d'amortissement et une mobilité contrôlée, reliées entre elles par des liaisons mécaniques permet par une combinaison de moyens d'assurer sa stabilité dans l 'espace intervertébral, constitue ainsi la prothèse 1 tripode dynamique.  This new assembly having three bearing surfaces arranged in a triangle (FIG. 9), each having damping properties and a controlled mobility, connected to one another by mechanical links, makes it possible, by a combination of means, to ensure its stability in the intervertebral space, thus constitutes the dynamic tripod prosthesis 1.
Ce nouvel assemblage apporte une grande stabilité de l'espace intervertébral avec des caractéristiques mécaniques nouvelles qui permettent de supporter toutes les sollicitations précédemment décrites avec les modes de travail à plusieurs degrés de liberté, qu'ils soient pris séparément, ou combinés. Dans une deuxième forme de réalisation, la prothèse intervertébrale tripode dynamique pourvue d'un amortissement, comporte deux sous ensembles 5a et 5b , chacun d'entre eux étant formé :  This new assembly provides a great stability of the intervertebral space with new mechanical characteristics that can withstand all the previously described solicitations with work modes with several degrees of freedom, whether taken separately, or combined. In a second embodiment, the dynamic tripodic intervertebral prosthesis provided with a damping comprises two subsets 5a and 5b, each of them being formed:
-d'un dispositif 2a ou 2b assurant un appui antérieur a device 2a or 2b providing an earlier support
-des dispositifs 3 et 4 identiques à ceux de la première version. devices 3 and 4 identical to those of the first version.
Chaque dispositif 2 a ou 2 b est différent du dispositif 2 de la première forme de réalisation par sa forme rectiligne au lieu de curviligne, il présente une surface de contact très proche de celle du dispositif 2, ce qui permet de doubler la surface d'appui antérieure de cette nouvelle prothèse constitué des deux sous-ensembles 5 a et 5 b. Each device 2a or 2b is different from the device 2 of the first embodiment by its rectilinear shape instead of curvilinear, it has a contact surface very close to that of the device 2, which doubles the surface area. previous support of this new prosthesis consisting of two subsets 5a and 5b.
Ce nouvel assemblage présente donc une plus grande surface d'appui antérieure, par doublement de sa surface de contact. La partie antérieure de la prothèse insérée entre les corps vertébraux, renforce la stabilité et l 'ancrage de cette nouvelle prothèse 1 dans l 'espace intervertébral ; elle apporte des caractéristiques mécaniques améliorées concernant notamment sa capacité d'amortissement et sa résistance aux contraintes. This new assembly therefore has a larger anterior bearing surface, by doubling its contact surface. The anterior part of the prosthesis inserted between the vertebral bodies reinforces the stability and the anchoring of this new prosthesis 1 in the intervertebral space; it brings improved mechanical characteristics concerning in particular its capacity of damping and its resistance to the stresses.

Claims

REVENDICATIONS
1- Prothèse intervertébrale tripode et dynamique ( 1) caractérisée en ce qu'elle est constituée de trois dispositifs (2), (3) et (4) et qu'elle prend appui sur trois surfaces disposées aux sommets d'un triangle, chacune des surfaces d'appui étant pourvue d'au moins un amortisseur permettant ainsi de supporter et d'amortir les charges mécaniques en contrôlant les déplacements intervertébraux. 1-intervertebral prosthesis tripod and dynamic (1) characterized in that it consists of three devices (2), (3) and (4) and is supported on three surfaces arranged at the vertices of a triangle, each bearing surfaces being provided with at least one damper thus allowing the mechanical loads to be supported and damped by controlling the intervertebral displacements.
2- Prothèse intervertébrale tripode et dynamique ( 1) selon la revendication 1 caractérisée en ce que : 2-tripodal and dynamic intervertebral prosthesis (1) according to claim 1 characterized in that:
- le dispositif (2) est de forme curviligne permettant d'assurer une première surface d'appui antérieure  the device (2) has a curvilinear shape making it possible to provide a first anterior support surface
- les dispositif (3) assurant les deux autres surfaces d'appui et disposant chacun d'une tige transversale (Ta)  - the device (3) providing the two other bearing surfaces and each having a transverse rod (Ta)
- les dispositifs (4) placés de chaque coté reliant le dispositif (2) avec le dispositif (3), chaque dispositif (4) étant formé d'une liaison mécaniques (Lm) cintrable, ou flexible se fixant au dispositif (2) et d'un connecteur (Cm) se fixant à la tige transversale (Ta) du dispositif (3), l'assemblage des dispositifs (2) et (3) avec le dispositif (4) se combinant pour apporter une excellente stabilité des surfaces d'appui de la prothèse ( 1) en évitant notamment l'expulsion du dispositif (2) de l'espace intervertébral.  - The devices (4) placed on each side connecting the device (2) with the device (3), each device (4) being formed of a flexible mechanical connection (Lm), or flexible fixing to the device (2) and a connector (Cm) attaching to the transverse rod (Ta) of the device (3), the assembly of the devices (2) and (3) with the device (4) combining to provide excellent stability of the surfaces of support of the prosthesis (1), in particular avoiding the expulsion of the device (2) from the intervertebral space.
3- Prothèse intervertébrale tripode et dynamique ( 1) pourvue au moins d'un amortisseur selon les revendications 1 et 2 caractérisée en ce que le dispositif (2 ) se compose :  3-intervertebral prosthesis tripod and dynamic (1) provided with at least one damper according to claims 1 and 2 characterized in that the device (2) consists of:
- d'un boîtier ( 10) composé d'un plateau inférieur (1 1 ) qui présente des moyens d'ancrage ( 142) permettant de fixer ledit boîtier ( 10) sur la première vertèbre, le plateau inférieur (1 1 ) étant lié rigidement à une enceinte comportant une orifice supérieure de préférence tronconique (100)  - a housing (10) composed of a lower plate (1 1) which has anchoring means (142) for fixing said housing (10) on the first vertebra, the lower plate (1 1) being linked rigidly to an enclosure having a preferably frustoconical upper orifice (100)
- d'un plateau mobile (14), relié à un piston ( 140) par une tige coulissante ( 141), ce plateau mobile ( 14) étant pourvu sur sa face supérieure de moyens d'ancrage ( 142 et 143) sur la vertèbre supérieure  - A movable plate (14), connected to a piston (140) by a sliding rod (141), the movable plate (14) being provided on its upper face with anchoring means (142 and 143) on the vertebra higher
- d'un pavé viscoélastique ( 13) situé entre la face interne ( 1 1 ) du boîtier ( 12) et la face inférieure du piston ( 140), ledit pavé ( 13) présentant une forme épousant celle du boîtier ( 10) avec en retrait vis à vis du boîtier (10) des jeux prévus à des endroits précis, pour autoriser l'expansion sans dommage dudit pavé viscoélastique ( 13) à l'intérieur du boîtier ( 10) assurant ainsi l'amortissement recherché. - a viscoelastic block (13) located between the inner face (1 1) of the housing (12) and the lower face of the piston (140), said block (13) having a shape matching that of the housing (10) with removal from the housing (10) of the games provided at specific locations, to allow the undamaged expansion of said viscoelastic pad (13) inside the casing (10) thus ensuring the desired damping.
4-Prothèse intervertébrale tripode et dynamique ( 1 ) pourvue au moins d'un amortisseur selon les revendications 1 ,2 et 3 caractérisée en ce que les jeux du dispositif (2) se répartissent ainsi :  4-tripodal and dynamic intervertebral prosthesis (1) provided with at least one damper according to claims 1, 2 and 3 characterized in that the clearances of the device (2) are distributed as follows:
-le premier jeu (Jl ) se situant entre le piston (140) et les parois interne du boitier (10)  the first clearance (Jl) lying between the piston (140) and the internal walls of the housing (10)
-le deuxième jeu (J2) se situant entre la tige coulissante (141 ) et l'orifice supérieure tronconique ( 1 00)  the second clearance (J2) lying between the sliding rod (141) and the frustoconical upper orifice (1 00)
la combinaison de (J l et J2) permettant au piston ( 140) de coulisser sans frottement, lors des sollicitations dynamiques appliquées au corps vertébral  the combination of (J l and J 2) allowing the piston (140) to slide without friction, during dynamic stresses applied to the vertebral body
-le troisième jeu (J3 ) se situant entre le moyen viscoélastique (13) et les parois internes du boitier ( 10), en permettant une déformation sans frottements entre les parois du boitier ( 10) dudit moyen viscoélastique ( 13), ceci quelque que soit le niveau et le type de sollicitations appliqué sur le piston ( 140)  the third set (J3) lying between the viscoelastic means (13) and the internal walls of the case (10), allowing frictionless deformation between the walls of the case (10) of said viscoelastic means (13), whatever the level and type of stresses applied to the piston (140)
5- Prothèse intervertébrale tripode et dynamique (1) pourvue au moins d'un amortisseur selon les revendications 1 ,2 et 3 caractérisée en ce que le bloc viscoélastique ( 13) présente une surface inférieure convexe ( 130) qui lui permet de loger et de s'auto centrer dans une concavité (1 10) correspondant à la surface du plateau inférieur ( 1 1 ).  5-intervertebral prosthesis tripod and dynamic (1) provided with at least one damper according to claims 1, 2 and 3 characterized in that the viscoelastic block (13) has a convex lower surface (130) which allows it to accommodate and centering itself in a concavity (1 10) corresponding to the surface of the lower plate (1 1).
6- Prothèse intervertébrale tripode et dynamique ( 1 ) pourvue d'au moins un amortisseur caractérisée en ce qu'elle comporte deux sous ensembles (5a et 5b), chacun d'entre eux étant formé :  6- Tripod and dynamic intervertebral prosthesis (1) provided with at least one damper characterized in that it comprises two subassemblies (5a and 5b), each of them being formed:
- d'un dispositif ( 2a ou 2b) assurant un appui antérieur  a device (2a or 2b) providing an earlier support
- des deux dispositifs (3 )et ( 4)  - of the two devices (3) and (4)
les dispositifs (2a ou 2 b) ayant chacun une forme rectiligne et présentant chacun une surface d'appui très proche de celle du dispositif (2), ce qui permet de doubler la surface d'appui antérieure de ladite prothèse (1 ) constituée des deux sous-ensembles (5 a et 5 b) en renforçant la stabilité par un meilleur ancrage de ladite prothèse (1) qui apporte de nouvelles caractéristiques mécaniques concernant notamment les capacité d'amortissement et de résistance aux sollicitations  the devices (2a or 2b) each having a rectilinear shape and each having a bearing surface very close to that of the device (2), which makes it possible to double the anterior bearing surface of said prosthesis (1) consisting of two subassemblies (5 a and 5 b) by reinforcing the stability by a better anchoring of said prosthesis (1) which brings new mechanical characteristics concerning in particular the capacity of damping and resistance to the stresses
PCT/FR2011/000125 2010-03-17 2011-03-09 Dynamic tripodal intervertebral prosthesis provided with shock absorption WO2011114013A1 (en)

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FR1001057A FR2957516B1 (en) 2010-03-17 2010-03-17 DYNAMIC TRIPOD INTERVERBRAL PROSTHESIS WITH DAMPING

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3391859A1 (en) * 2017-04-21 2018-10-24 "CHM" Spolka Z Organiczona Odpowiedzialnoscia Facet joint implants system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015001197A1 (en) * 2013-07-01 2015-01-08 Biospine Implants Dynamic intervertebral stabilisation device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050027359A1 (en) * 2003-07-31 2005-02-03 Mashburn M. Laine Spinal interbody fusion device and method
US20070168039A1 (en) * 2006-01-13 2007-07-19 Sdgi Holdings, Inc. Materials, devices and methods for treating multiple spinal regions including vertebral body and endplate regions
WO2007121076A1 (en) * 2006-04-18 2007-10-25 Warsaw Orthopedic, Inc Arthroplasty device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050027359A1 (en) * 2003-07-31 2005-02-03 Mashburn M. Laine Spinal interbody fusion device and method
US20070168039A1 (en) * 2006-01-13 2007-07-19 Sdgi Holdings, Inc. Materials, devices and methods for treating multiple spinal regions including vertebral body and endplate regions
WO2007121076A1 (en) * 2006-04-18 2007-10-25 Warsaw Orthopedic, Inc Arthroplasty device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3391859A1 (en) * 2017-04-21 2018-10-24 "CHM" Spolka Z Organiczona Odpowiedzialnoscia Facet joint implants system

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FR2957516A1 (en) 2011-09-23
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