EP3487431A1 - Dispositif de stabilisation vertébrale - Google Patents
Dispositif de stabilisation vertébraleInfo
- Publication number
- EP3487431A1 EP3487431A1 EP17746038.3A EP17746038A EP3487431A1 EP 3487431 A1 EP3487431 A1 EP 3487431A1 EP 17746038 A EP17746038 A EP 17746038A EP 3487431 A1 EP3487431 A1 EP 3487431A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elements
- connecting element
- vertebrae
- rods
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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
- A61B17/7049—Connectors, not bearing on the vertebrae, for linking longitudinal elements together
-
- 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
-
- 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
- A61B17/7011—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
- A61B17/7001—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
-
- 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
- A61B17/7026—Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each other with a part that is flexible due to its form
-
- 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
- A61B17/7043—Screws or hooks combined with longitudinal elements which do not contact vertebrae with a longitudinal element fixed to one or more transverse elements which connect multiple screws or hooks
-
- 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
- A61B2017/7073—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant with intervertebral connecting element crossing an imaginary spinal median surface
Definitions
- the present invention relates to the field of surgical implants and more particularly to vertebral stabilization devices implanted in the human body for the treatment of pathologies of the spine.
- vertebral stabilization devices There are numerous vertebral stabilization devices whose common feature is to be arranged to connect adjacent vertebrae by means of rods or bars extending substantially in a plane parallel to the medial sagittal plane of the vertebral column.
- the stabilization obtained is then very effective but causes a blockage of the movements of the vertebrae relative to each other. This blockage reduces the pain that can feel the patient but obviously affects its mobility to the point that it is disabling.
- An object of the invention is to provide a means for stabilizing the spine of a patient and / or correct a deformation between vertebrae of the spine by connecting two vertebrae together without completely blocking the relative movements of the vertebrae thus connected .
- a. vertebral stabilization device comprising at least two main connecting elements arranged to connect two distinct vertebrae together, and elements for fixing the ends of each connecting element to the two distinct vertebrae.
- Each link element main plane has a median plane containing a longitudinal direction of the main link element.
- the main connecting elements are of such length and the fixing elements are arranged in such a way that each main connecting element can extend diagonally between the two vertebrae to which it is attached by crossing the median sagittal plane of the spine, the two main connecting elements intersecting substantially at said median sagittal plane of the vertebral column.
- the device is arranged to allow a physiological angular deflection of the two vertebrae relative to each other.
- the two vertebrae are interconnected by two connecting elements, for example rods, which intersect substantially at the medial sagittal plane of the spine and the device is arranged to allow a physiological angular deflection of the two vertebrae. one compared to the other.
- This bond is naturally more flexible than a bond by rods extending on a plane parallel to the median sagittal plane.
- the length of the connecting elements greater than in the case of rods extending on a plane parallel to the median sagittal plane and their crossing makes it possible to obtain a stabilization structure which is relatively deformable according to the three planes of the space especially at the crossing of the connecting elements.
- This arrangement indeed allows a physiological movement of the vertebral column in flexion in the medial sagittal plane and in lateral inclination in the medial frontal plane, as well as in torsion around the spinal axis.
- the amplitude of this displacement is certainly lower than that of an unstabilized spine but sufficient to substantially improve the comfort of patients.
- the connecting elements thus arranged and positioned reproduce at least partly an organic architecture, in particular on the histological plane osteo-disc and myological, which facilitates its integration into the body and its acceptance by the patient.
- At least the fastening elements located on the same side of the median sagittal plane of the spine and on distinct vertebrae are free with respect to each other.
- This arrangement allows a very large movement of the vertebrae relative to each other.
- the device comprises on each side of the medial sagittal plane a lateral connecting element interconnecting two fastening elements on the same side of the median sagittal plane, each lateral connecting element being arranged to authorize a reconciliation of fastening elements which it connects and limit a clearance of said fasteners at a distance equal to the length of the lateral connecting element.
- This arrangement limits the maximum movement of the vertebrae relative to each other beyond the physiological movement.
- Figure 1 is a schematic perspective view of the posterior portion of a spine
- Figures 2 to 5 are views similar to Figure 1 which illustrate the establishment of vertebral stabilization devices according to a first embodiment of the invention in a first arrangement of the device;
- Figure 6 is a schematic perspective view of the posterior portion of this spine after placement of vertebral stabilization devices according to the first embodiment
- Figure 7 is a schematic side view of a first of the rods of one of these devices.
- Figure 8 is a schematic end view of this first rod
- Figure 9 is a schematic side view of a second of the rods of one of these devices.
- FIG. 10 is a schematic end view of this second stem
- Figure 11 is a schematic perspective view, at a different angle of view than that of Figures 1 to 6, the rear part of the spine equipped with vertebral stabilization devices according to the first embodiment in the first arrangement of the device;
- Figure 12 is a schematic perspective view of the posterior portion of a spine in the course of equipment of vertebral stabilization devices according to a second embodiment of the invention in the first arrangement of the device;
- Figures 13 and 14 are schematic perspective views of fasteners of the rods of these devices.
- Figure 15 is a view similar to Figure 11 of vertebral stabilization devices according to a variant of the first embodiment of the invention.
- Figure 16 is a perspective view of these stabilizers
- Figure 17 is a detailed view of one of these devices, in section along the plane XVII of Figure 16;
- Figures 18 and 19 are views similar to the views of Figures 7 and 9 respectively, the first and second rods according to said variant of the first embodiment of the invention.
- Figure 20 is a schematic perspective view of a vertebra equipped with a fastening element of a vertebral stabilization device according to a third embodiment of the invention
- Figure 21 is a schematic perspective view of the posterior portion of the spine with vertebral stabilization devices according to the first embodiment in a second arrangement of the device;
- Fig. 22 is an enlarged view of a side link member in the second arrangement of the device.
- the vertebral stabilization device comprises pairs of rods 1, forming main connecting elements, arranged to connect two distinct vertebrae together and elements 10 of fixing the ends of each rod 1 to the two distinct vertebrae.
- Each rod 1 extends along a median longitudinal plane containing a longitudinal direction of the rod.
- the rods 1 have a length, measured in this longitudinal direction, such that each rod 1 can extend diagonally between the two vertebrae to which it is fixed by crossing the median sagittal plane S of the spine, the two rods 1 of each pair of rods 1 intersecting substantially at said mid-sagittal plane S.
- the rods 1 have a central curved portion 2 (the center of curvature being substantially in the median longitudinal plane), an end portion 3 provided with a ring 4 of substantially circular shape and an end portion 5 provided with an oblong loop 6 having a major axis extending in the extension of the central axis of the end portion 5.
- the ring 4 and the oblong loop 6 extend along inclined planes relative to each other,
- the loop 6 has first and second surfaces which are perpendicular to the axis of its opening and substantially planar.
- the first surface is intended to be oriented towards the vertebra.
- the edge delimiting the opening of the oblong loop 6 comprises, on the second surface, recesses 7 in the form of a spherical cap defining successive positions along the major axis of the loop 6.
- Each pair of rods 1 comprises an indexed stem 1 (shown more particularly in FIGS. 7 and 8) and an indexed rod 1 (shown more particularly in FIGS. 9 and 10).
- the rods 1a and 1b have different bending radii; the central portion 2 of the rod has a radius greater than the radius of the central portion 2 of the rod 1b.
- the rods 1 are here organic material.
- the rods 1 are for example a thermoplastic such as polyether ether ketone (better known by the acronym PEEK).
- the rods 1 ensure that the vertebral stabilization device is relatively deformable not only by their shape, their arrangement but also by their material.
- Each fastening element 10 comprises a stud having a shouldered portion 20 which extends between a worm 30 and a threaded rod 40 coaxial with the worm screw 30.
- the worm 40 is intended to cooperate with a base nut 41 42.
- the shouldered portion 20 comprises a first spherical cap surface on the side of the pedicle screw 30 and a second frustoconical surface on the side of the threaded rod 40.
- the ring 4 has a substantially concave spherical cap surface to bear on the second frustoconical surface of the shoulder portion 20 or on the edges of the loop 6 and a substantially convex spherical cap surface to cooperate with the base 42 of the nut 41.
- the stabilization device according to the invention is set up after partial or total withdrawal, of the spinous processes of the vertebrae concerned and possibly partial milling of articular masses (Figure 1 represents the spine before cutting said processes), in FIGS. at 6, it can be seen that the spinous processes of the L3 and L4 vertebrae have been reduced: a first stabilizing device will be installed between the lumbar vertebrae L5, L4 and a second stabilizing device will be installed between the lumbar vertebrae L4, L3.
- the installation of the stabilization devices begins by screwing the pedicle screws 30 to fix the fastening elements 10 to the vertebrae concerned ( Figure 2).
- the rods 1 will be fixed to the fastening elements 10 so that each rod 1 extends diagonally between two adjacent vertebrae by crossing the median sagittal plane S of the portion of the spine formed by the vertebrae L5 to L3, the two rods 1 of each pair of rods 1 intersecting substantially at said plane S.
- the rods are arranged closest to the spine and the rods 1b overlap the stems la.
- the rings 4 of the rod 1a and the rod 1b are engaged on the threaded rods 40 of the fastening elements 10 screwed into the vertebra L5 and the oblong loops 6 of said rods 1a and 1b are engaged on the threaded rods 40 fasteners 10 screwed into the vertebra L4 so that the rods 1a and 1b intersect ( Figure 3).
- the rings 4 of the rod 1a and the rod 1b are engaged on the threaded rods 40 of the fastening elements 10 screwed into the vertebra L4 (that is to say, above them).
- oblong loops 6 of the rods 1a, 1b of the first stabilizing device and the oblong loops 6 of said rods 1a and 1b are engaged on the threaded rods 40 of the fastening elements 10 screwed into the vertebra L3 so that the rods 1a and 1b become cross (figure 4).
- the ring 4 of the rod 1a of the second stabilizing device is engaged on the same threaded rod as the loop 6 of the rod 1a of the first stabilizing device and the ring 4 of the rod 1b of the second stabilizing device is engaged on the same threaded rod as the loop 6 of the rod lb of the first stabilizing device.
- the nuts 41 are then engaged on the threaded rods 40 and the vertebrae L5 to L3 are correctly positioned and held in position relative to each other before tightening the nuts 41 to tighten the rings 4 and the oblong loops 6 against the second frustoconical surface of the shoulder portions 20 ( Figures 5 and 6).
- the oblong loops 6 make it possible to adjust the tension of the rods 1a and 1b before tightening by adjusting the position of the threaded rod 40 along the long axis of the oblong loop 6. This tensioning makes it possible to exert possible corrections of the placement. vertebrae between them by conjugate or isolated actions on one or both stems of the same vertebral segment.
- the fastening elements 10 located on the same side of the medial sagittal plane S of the spine are free with respect to each other.
- the rods 1 have mechanical properties enabling them to withstand compressive, tensile, bending and twisting forces normally involved during a natural mobilization of the spine.
- a bushing 60 provided at each of its ends with a flange 61 coming to cover the corresponding face of the ring 4.
- the flanges 61 provide L flat support and improves the strength of the rods la, lb after screwing the fasteners 10.
- One interface 70 is engaged on the loop 6 of each rod 1a, 1b.
- the interface 70 comprises two plates 71 held parallel and spaced relatively one to the other by an inclined spacer 72.
- the inclined spacer 72 has a relative elasticity which allows it to allow a closer approximation of the plates 71 of one another.
- the plates 71 extend on the faces of the loop 6 and are pierced with an orifice 73 to receive the threaded rod 40.
- Each fastening element 10 comprises a stud having a shouldered portion 20 which extends between a worm 30 and a threaded rod 40 coaxial with the worm 30.
- the threaded rod 40 is intended to cooperate with a nut 41 to base 42.
- the base 42 is flat to be plated against a flange 61 or against a plate 71.
- the shouldered portion 20 comprises a first spherical cap surface on the side of the pedicle screw 30 and a second flat surface on the side of the threaded rod 40 to serve as plane support either to a flange 61 or to a plate 71.
- the rods 1a, 1b each comprise a curved central portion 2, an end portion 3 and. an end portion
- the end portions 3 and 5 are here of constant section and are devoid of ring or loop.
- Each fastening element 10 comprises a stud and a nut 41 with base 42 identical to that of the first embodiment.
- the fastening element 10 further comprises a body 50 or two bodies 50 depending on whether the fastening element 10 is used for fixing one or two rods 1.
- the body 50 comprises a tubular portion 51 which defines a housing 52 open over its entire length by a slot 53. Since the edges of the slot 53 extends two plates 54 parallel and separated from one another space of width equal to that of the slot 53.
- the plates 54 are pierced with a hole 55 and are deformed to have a slightly frustoconical shape.
- the housing 52 has a diameter substantially corresponding to that of the end portions 3, 5 and the hole 55 has a diameter slightly greater than the diameter of the threaded rod 40.
- One of the bodies 50, numbered 50a, is intended for fixing the rod 1a and the other of the bodies 50, numbered 50b, is intended for fixing the rod 1b.
- the diameter of the hole 55 of the body 50a is greater than that of the hole 55 of the body 50b.
- the studs of the fastening elements 10 are put in place in the vertebrae concerned.
- a body 50a is engaged on one of the fixed rods 40 mounted on the vertebra L5, a body 50b is engaged. ge on the other threaded rods 40 mounted on the vertebra L5, a body 50a and a body 50b are engaged on each of the threaded rods 40 mounted on the vertebra L, a body 50a is engaged on one of the threaded rods 40 mounted on the vertebra L3, a body 50b is engaged on the other of the threaded rods 40 mounted on the vertebra L3 such that on one side of the medial sagittal plane S, two bodies 50a are mounted on the vertebrae L5 and L3 and on the other side of the medial sagittal plane S, two bodies 50b are mounted on the vertebrae L5 and L3.
- each rod 1 extends diagonally between two adjacent vertebrae by crossing the median sagittal plane S of the vertebral column, the two rods 1 each pair of rods 1 intersecting substantially at said plane S.
- the rods are disposed between the spine and rods lb.
- the bodies 50 are adjustable around the threaded rods 40, which allows adjustment of an orientation of the two rods 1 relative to the same vertebra.
- the nuts 41 are mounted on the threaded rods 40 and it is necessary to tighten the nuts 41 mounted on the threaded rods 40 to complete the implementation of the stabilizing device.
- tools 100 comprising two sleeves 101 arranged to engage on the threaded rods 40 and connected to one another by an adjustable armature 102 allowing more or less spread the sleeves 101 one the other ,
- the nut 41 is tightened in order to lock the fastening element 10 on the pedicle screw 30 and the end portions 3, 5 in the locking element. 10.
- the nut 41 brings the plates 54 closer to each other and clamp the end portion 3, 5 in the housing 52 and the fastening element 10 against the shouldered portion 20 connecting the pedicle screw 30. to the threaded rod 40.
- the fastening elements 10 located on the same side of the medial sagittal plane S of the spine are free with respect to each other.
- the rods 1 have mechanical properties enabling them to withstand compressive, tensile, bending and twisting forces normally involved during a natural mobilization of the spine.
- the third embodiment differs from the first embodiment in the fastener elements.
- each attachment element 110 here comprises a lacing cord 162 for its attachment to the vertebra L associated.
- Each lacing cord 162 is here flat.
- Each fixing element 110 thus comprises a stud having a shouldered section 120 extended by a threaded rod 140.
- the threaded rod 140 is intended to cooperate with a flange nut (not visible here) as in the first embodiment.
- the stepped section 120 comprises a first surface spherical cap on the side of the lacing cord and a second frustoconical surface on the side of the threaded rod 140.
- the first spherical cap surface is intended to be oriented towards a transverse process T of the vertebra L.
- the first spherical cap surface is extended by two ring segments 104a, 104b.
- the shouldered portion 120 has at its first spherical cap surface a chute 165 designed to conform to the shape of the transverse process T once the shouldered portion 120 is in contact with said transverse apophysis T.
- the chute 165 has for example a semicircular section.
- each ring section 104a, 104b extends from the first spherical cap surface so that the two ring sections 104a, 104b have the same axial direction.
- the sections of rings 104a, 104b are thus oriented so that their radial direction extends substantially perpendicular to the axis of the threaded rod 140.
- Each ring section 104a, 104b extends respectively on either side of the chute 165.
- Each ring section 104a, 104b extends so that the inner main surface of each ring section 104a, 104b , intended to be oriented towards the transverse process T of the vertebra L.
- the ring-shaped section in the form of an arc is suitable for placing the attachment element 110 at best with the transverse process. T.
- Each ring segment 104a, 104b is by furthermore provided with a groove, respectively 163a, 163b, radially crossing the associated ring section for the passage of the lacing bead 162.
- the two grooves extend substantially respectively at the free circumferential end of the ring section associated (as opposed to the circumferential end of each ring portion integral with the first spherical cap surface).
- the device comprises as previously rods 1 forming the main connecting elements and fastening elements 10.
- the rods 1 and the f i xat i on elements may be in accordance with any of the previously described embodiments.
- the second arrangement is characterized in that the device comprises, on each side of the sagittal plane S, a rod 61 forming a lateral connecting element interconnecting two fastening elements 10 on the same side of the sagittal plane S.
- Each rod 61 comprises a central section 62 which sensing a bend and two ends 63 each provided with a ring 64 to be engaged on a threaded rod 40.
- Each rod 61 has a longitudinal axis contained in a particular plane substantially parallel to the median frontal plane of the spine. According to the pathology concerned, each rod 61 is shaped so that the center of curvature of the central section 62 is in said particular plane, on the side of the sagittal plane S in which is the rod 61 concerned, or in said particular plane, on the side opposite of the sagittal plane S in which is the rod 61 concerned.
- Each rod 61 is arranged to be deformable in bending by accentuating the curvature of the central section 62.
- Each rod 61 mounted between two fastening elements 10 allows a rimpedement of the fastening elements 10 that it connects and limits a spacing of said fastening elements 10 at a distance equal to the length of the rod 61 (the length of the rod 61 being here the actual length of the rod 61 that is to say the length following the curvature of the rod).
- the material, the shape and the section of the rods 1, 61 will be chosen so that the vertebral stabilization device has mechanical and dynamic properties close to the tensor system (formed by the muscles, fascia and ligaments) which surrounds the bone structure of the spine.
- the invention is not limited to the embodiments described but encompasses any variant within the scope of the invention as defined by the claims.
- the device may have a different structure from that shown in the figures.
- the fastening elements may directly comprise an entire collar arranged to be arranged around a transverse process to attach an end of at least one rod in place of a collar formed of several elements, for example described in the third embodiment of FIG. production.
- the fasteners may be arranged to fix a rod.
- connecting elements have been described as rods, they may have other shapes.
- the connecting elements may be of another material than an organic material and for example a metal such as titanium.
- the rods comprise an end portion provided with a ring and a right end portion and the fastening elements comprise a parallelepiped-shaped body split along a plane and provided with two housings for respectively receiving the right end portion and the ring of two rods 1.
- the housings are traversing along two parallel axes contained in the plane P and corresponding to the direction of introduction of the right end portion and the ring in housing.
- the housing receiving the right end portion is of cylindrical shape and the body is provided with clamping means of the right end portion in said housing.
- the clamping means comprise a pressure screw engaged in a tapping formed in the body transversely to said housing having one end opening into the housing and an end opening to the outside of the body.
- the housing accommodating the ring is parallelepipedal shape to accommodate the ring flat perpendicular to the pedicle screw 30. A bore through the body at the housing to accommodate the threaded rod 40.
- each rod 1 may be provided with a ring 4.
- Different fixing elements may be used to fix the same end of a connecting element to the vertebra considered especially in the case of a vertebra with poor bone quality.
- the vertebral stabilization device may comprise one or more additional connecting members (in addition to the connecting elements), such as a stay, connected to the vertebrae either via the fastening elements of said connecting elements or via other fasteners.
- the vertebral stabilization device can be arranged at the posterior level as well as at the anterior level of the spine.
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- Orthopedic Medicine & Surgery (AREA)
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- Engineering & Computer Science (AREA)
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- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1657131A FR3054124B1 (fr) | 2016-07-25 | 2016-07-25 | Dispositif de stabilisation vertebrale |
PCT/EP2017/068688 WO2018019792A1 (fr) | 2016-07-25 | 2017-07-24 | Dispositif de stabilisation vertébrale |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3487431A1 true EP3487431A1 (fr) | 2019-05-29 |
Family
ID=57233622
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17746038.3A Pending EP3487431A1 (fr) | 2016-07-25 | 2017-07-24 | Dispositif de stabilisation vertébrale |
Country Status (7)
Country | Link |
---|---|
US (1) | US11039862B2 (fr) |
EP (1) | EP3487431A1 (fr) |
CA (1) | CA3031012C (fr) |
FR (1) | FR3054124B1 (fr) |
IL (1) | IL264366B (fr) |
RU (1) | RU2716347C1 (fr) |
WO (1) | WO2018019792A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112190321A (zh) * | 2020-05-26 | 2021-01-08 | 陆金明 | 腰椎假性滑脱微创链式稳定装置 |
FR3136149A1 (fr) | 2022-06-01 | 2023-12-08 | Paul Fayada | Dispositif de stabilisation vertébrale |
Family Cites Families (13)
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FR2692952B1 (fr) * | 1992-06-25 | 1996-04-05 | Psi | Amortisseurs perfectionnes a limite de deplacement. |
US5415661A (en) * | 1993-03-24 | 1995-05-16 | University Of Miami | Implantable spinal assist device |
RU2176907C2 (ru) * | 1999-10-13 | 2001-12-20 | Галикеев Марат Фаритович | Устройство остеосинтеза позвоночника |
RU14009U1 (ru) * | 1999-11-16 | 2000-06-27 | Уфимский государственный авиационный технический университет | Устройство для коррекции позвоночника |
US20020133155A1 (en) * | 2000-02-25 | 2002-09-19 | Ferree Bret A. | Cross-coupled vertebral stabilizers incorporating spinal motion restriction |
DE10117426A1 (de) * | 2001-04-06 | 2002-10-10 | Michael Hahn | Fixateur und Verfahren zum Fixieren eines Abschnittes einer Wirbelsäule |
US6626909B2 (en) * | 2002-02-27 | 2003-09-30 | Kingsley Richard Chin | Apparatus and method for spine fixation |
RU2249440C1 (ru) * | 2003-07-11 | 2005-04-10 | Мухаметов Фарит Фагимович | Устройство для коррекции и фиксации позвоночника |
DE102004010844A1 (de) * | 2004-03-05 | 2005-10-06 | Biedermann Motech Gmbh | Stabilisierungseinrichtung zur dynamischen Stabilisierung von Wirbeln oder Knochen und stabförmiges Element für eine derartige Stabilisierungseinrichtung |
WO2006047742A2 (fr) * | 2004-10-26 | 2006-05-04 | Concept Matrix, Llc | Systeme de fixation interne pour chirurgie du rachis |
US20060106381A1 (en) * | 2004-11-18 | 2006-05-18 | Ferree Bret A | Methods and apparatus for treating spinal stenosis |
US20100094344A1 (en) * | 2008-10-14 | 2010-04-15 | Kyphon Sarl | Pedicle-Based Posterior Stabilization Members and Methods of Use |
WO2011130606A2 (fr) * | 2010-04-15 | 2011-10-20 | Hay J Scott | Système précontraint de stabilisation de la colonne vertébrale |
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2016
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2017
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- 2017-07-24 CA CA3031012A patent/CA3031012C/fr active Active
- 2017-07-24 RU RU2019105021A patent/RU2716347C1/ru active
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US11039862B2 (en) | 2021-06-22 |
RU2716347C1 (ru) | 2020-03-11 |
IL264366B (en) | 2022-09-01 |
FR3054124A1 (fr) | 2018-01-26 |
WO2018019792A1 (fr) | 2018-02-01 |
CA3031012A1 (fr) | 2018-02-01 |
IL264366A (en) | 2019-02-28 |
US20190269441A1 (en) | 2019-09-05 |
CA3031012C (fr) | 2021-08-03 |
FR3054124B1 (fr) | 2018-07-13 |
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