WO2007037774A1 - Plaque cervicale dynamique - Google Patents

Plaque cervicale dynamique Download PDF

Info

Publication number
WO2007037774A1
WO2007037774A1 PCT/US2005/014383 US2005014383W WO2007037774A1 WO 2007037774 A1 WO2007037774 A1 WO 2007037774A1 US 2005014383 W US2005014383 W US 2005014383W WO 2007037774 A1 WO2007037774 A1 WO 2007037774A1
Authority
WO
WIPO (PCT)
Prior art keywords
bar
shaft
elongated shaft
clip
along
Prior art date
Application number
PCT/US2005/014383
Other languages
English (en)
Inventor
Brett O. Baynham
Clay G. Baynham
Matthew G. Baynham
David R. Campbell
Original Assignee
Innovative Spinal Design
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 Innovative Spinal Design filed Critical Innovative Spinal Design
Priority to PCT/US2005/014383 priority Critical patent/WO2007037774A1/fr
Publication of WO2007037774A1 publication Critical patent/WO2007037774A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8004—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones
    • A61B17/8009—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with means for distracting or compressing the bone or bones the plate having a ratchet
    • 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
    • A61B17/7059—Cortical plates

Definitions

  • This invention relates to the field of orthopedic surgery and, particularly, to the area of spinal implants for stabilizing the spatial relationship of vertebrae.
  • the device is designed for use in the cervical region of the spine though one skilled in the art may use the device in other regions of the spine and other skeletal fixations. Description of the Prior Art
  • Bone plates are well known in the orthopedic art for fixing bones or bone fragments in a pre-selected spatial orientation.
  • the plates are usually attached to the bones or bone fragments by screws designed to make a secure and long lasting connection not affected by the loads caused by normal activities of the host.
  • Gertzbein et al, U. S. Patent No. 5,620,443 teaches an adjustable cervical connector composed of dual rods spanning the distance between adjacent vertebrae.
  • the rods carry at least two slidable transverse connectors which are attached to the vertebrae by spikes and pedicle screws thereby fixing the relationship of the bones.
  • the connectors are immobilized on the rods by clamps.
  • the plate In all these prior art devices, the plate must be held in the selected position while the securing set screws or other fasteners are put in place and the final assembly is completed.
  • a cervical plate with an elongated shaft adapted to span the intervertebral space and having at least two screw receivers spaced along the length of the plate.
  • the screw receivers each have screw holes for accepting the heads of pedicle screws.
  • Another objective of this invention is to provide a locking mechanism that is manually operated simultaneously with the positioning of the screw receivers along the plate to provide compression across the intervertebral space.
  • a further objective of this invention is to provide the locking mechanism with a retainer extending over the screw holes to prevent back out of the screws.
  • Yet another objective of this invention is to provide a guide rail on the plate shaft cooperating with the screw receivers to permit sliding connection between the screw receivers and the plate shaft.
  • Still another objective of this invention is to provide a ratchet mechanism on the shaft and screw receivers to permit post operative one-way movement shortening the distance between the screw receivers and maintaining compression across the intervertebral space.
  • Figl is a perspective of the cervical plate and screw receivers of this invention
  • Fig. 2 is a bottom plan view of the cervical plate and screw receivers
  • Fig. 3 is a cross section of the cervical plate, along line 3-3 of Fig. 1, with the clip unseated;
  • Fig. 4 is a cross section of the cervical plate, along line 4-4 of Fig. 1, with the clip seated in the ratchet.
  • the cervical plate 10 has an elongated flat shaft that is made in different lengths but must be of a length to span, at least, the distance between two vertebrae.
  • the plate has a lateral bar 12 fixed to one end and a free end.
  • the bar has an countersunk apertures 20, 20' on each side of the plate for capturing the head of pedicle screws.
  • Permanently mounted to the plate is a clip having ears 18, 18'.
  • the clip is resilient and extends under the plate parallel but outside the periphery of the bar then rises vertically to the top of the plate and extends across the pedicle screw apertures 20, 20'.
  • the portion that extends across the countersunk apertures 20, 20' are the ears 18, 18' for retaining the pedicle screws to prevent back-out.
  • the retainer is resilient enough to allow flexing while the heads of the pedicle screws are seated in the aperture then is released on top of the screw heads.
  • the ears 18, 18' have wedges 50 which engage the edges of the screw heads as the screws are tightened to further lock the screws in place.
  • the bottom of the shaft has a row of teeth 15 formed across the longitudinal axis of the plate.
  • the teeth are angled to form a ratchet allowing one-way movement of a bar from the free end toward the lateral bar at one end of the plate. In some instances, the teeth may be cut normal to the shaft.
  • a groove 23, 23' extending from the free end toward the lateral bar.
  • At least one movable bar 13 is Slidably attached to the free end of the shaft.
  • the second bar 14 is of the same construction as the bar 13. Bar 13 and bar 14 have the same structure therefore, reference to elements of one bar is the same as the other.
  • the slidable bar 13 has a distal surface which engages the vertebrae and is convexly curved to closely fit the curvature of the vertebrae.
  • the bar has an aperture 21, 21' near each end with a depression 25 therebetween
  • the depression is approximately the same depth as the thickness of the shaft to provide a low profile to the assembled cervical plate.
  • the opposite edges of the depression have shoulders 26, 26', shown in Fig. 3, that slide within the longitudinal grove 23, 23' in the plate. This provides a close association between the surface of the bar depression and the ratchet teeth of the plate.
  • Attached to bar 13 is a clip having a retainer 17, 17'.
  • the clip has an elongated hollow body with an oval shape. The sides of the oval follow the edges of the depression so that the retainers 17, 17' are on the proximal surface of the bar. At least one side of the clips is welded 99 or otherwise permanently attached to the respective side of the bars. The rounded ends of the oval form the screw retainers.
  • the pawl portion 27, 28 of the clips extend across the shaft engaging the teeth 15 to form the ratchet.
  • the pawls are formed by a raised flange 24, shown in Fig.3.
  • the clips 16 and 17 have a flange that extends above the surfaces of the bars to engage the teeth 15 of the ratchet on the shaft.
  • the clips may have pawls 27, 27' and 28, 28' on both sides of the bar, shown in Fig. 2.
  • the flange 24 can be disengaged from the ratchet teeth 15, as shown in Fig. 3, for initial adjustment.
  • the vertebrae are manipulated into the desired position and grafting material placed as required to compensate for removal of bone and/or disk material.
  • the plate is placed on the spine and adjusted to provide some compression on the site to assist in the grafting of the spine.
  • the shoulders of the bars and the grooves on the shaft maintain a close fit between the pawls and the teeth on the shaft requiring the pawls to be deflected by the teeth.
  • the ratchet prevents retrograde movement of the bars away from the head.
  • the pedicle screws are driven into the spine. As the screw heads engage the apertures the retainers are flexed to permit the screw heads to seat in the apertures and released to block back-out.
  • the second bar may be added to the free end of the plate to add stability to the compressed site and to reduce and equalize the pressure.
  • the pawls may be omitted, and the plate may move in both directions within the bars.

Landscapes

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

Abstract

La présente invention concerne une plaque cervicale dynamique qui comprend un mécanisme à rochet qui permet à la plaque cervicale de raccourcir post-opératoirement la longueur de la plaque et de maintenir la compression entre vertèbres adjacentes. La plaque comporte un axe allongé avec des dents sur une surface et une rainure le long de chaque rebord longitudinal. Une barre latérale est jointe à une extrémité de l’arbre. La barre comprend des orifices de vis permettant de la connecter à la tête d’une vis rachidienne. Une autre barre latérale est engagée par glissement dans les rainures longitudinales figurant le long de l’arbre et comprend une sauterelle de fixation agissant comme cliquet sur les dents de l’arbre. La barre glissante comporte des orifices de vis de chaque côté de l’arbre. La sauterelle de fixation est configurée pour recouvrir les orifices de fixation pour empêcher les vis de sortir des orifices.
PCT/US2005/014383 2005-04-26 2005-04-26 Plaque cervicale dynamique WO2007037774A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2005/014383 WO2007037774A1 (fr) 2005-04-26 2005-04-26 Plaque cervicale dynamique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2005/014383 WO2007037774A1 (fr) 2005-04-26 2005-04-26 Plaque cervicale dynamique

Publications (1)

Publication Number Publication Date
WO2007037774A1 true WO2007037774A1 (fr) 2007-04-05

Family

ID=37900072

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/014383 WO2007037774A1 (fr) 2005-04-26 2005-04-26 Plaque cervicale dynamique

Country Status (1)

Country Link
WO (1) WO2007037774A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8668723B2 (en) 2011-07-19 2014-03-11 Neurostructures, Inc. Anterior cervical plate
US8940030B1 (en) 2011-01-28 2015-01-27 Nuvasive, Inc. Spinal fixation system and related methods
US9486250B2 (en) 2014-02-20 2016-11-08 Mastros Innovations, LLC. Lateral plate
US9629664B2 (en) 2014-01-20 2017-04-25 Neurostructures, Inc. Anterior cervical plate
US10512547B2 (en) 2017-05-04 2019-12-24 Neurostructures, Inc. Interbody spacer
US10675071B2 (en) 2016-10-07 2020-06-09 Acumed Llc System and method for bone fixation using a plate straddled by a retainer
US10980641B2 (en) 2017-05-04 2021-04-20 Neurostructures, Inc. Interbody spacer
US11071629B2 (en) 2018-10-13 2021-07-27 Neurostructures Inc. Interbody spacer
US11076892B2 (en) 2018-08-03 2021-08-03 Neurostructures, Inc. Anterior cervical plate
US11304817B2 (en) 2020-06-05 2022-04-19 Neurostructures, Inc. Expandable interbody spacer
US11382761B2 (en) 2020-04-11 2022-07-12 Neurostructures, Inc. Expandable interbody spacer
US11717419B2 (en) 2020-12-10 2023-08-08 Neurostructures, Inc. Expandable interbody spacer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4289123A (en) * 1980-03-31 1981-09-15 Dunn Harold K Orthopedic appliance
US20020188296A1 (en) * 2001-06-06 2002-12-12 Michelson Gary K. Dynamic, modular, multilock anterior cervical plate system having detachably fastened assembleable and moveable segments, instrumentation, and method for installation thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4289123A (en) * 1980-03-31 1981-09-15 Dunn Harold K Orthopedic appliance
US20020188296A1 (en) * 2001-06-06 2002-12-12 Michelson Gary K. Dynamic, modular, multilock anterior cervical plate system having detachably fastened assembleable and moveable segments, instrumentation, and method for installation thereof

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9504584B1 (en) 2011-01-28 2016-11-29 Nuvasive, Inc. Spinal fusion implant and related methods
US8940030B1 (en) 2011-01-28 2015-01-27 Nuvasive, Inc. Spinal fixation system and related methods
US9913730B1 (en) 2011-01-28 2018-03-13 Nuvasive, Inc. Spinal fixation system and related methods
US9918749B2 (en) 2011-07-19 2018-03-20 Howmedica Osteonics Corp. Anterior cervical plate
US9113964B2 (en) 2011-07-19 2015-08-25 Howmedica Osteonics Corp. Anterior cervical plate
US9101407B2 (en) 2011-07-19 2015-08-11 Howmedica Osteonics Corp. Anterior cervical plate
US11478283B2 (en) 2011-07-19 2022-10-25 Howmedica Osteonics Corp. Anterior cervical plate
US8668723B2 (en) 2011-07-19 2014-03-11 Neurostructures, Inc. Anterior cervical plate
US10912591B2 (en) 2011-07-19 2021-02-09 Howmedica Osteonics Corp. Anterior cervical plate
US9629664B2 (en) 2014-01-20 2017-04-25 Neurostructures, Inc. Anterior cervical plate
US9486250B2 (en) 2014-02-20 2016-11-08 Mastros Innovations, LLC. Lateral plate
US9775652B2 (en) 2014-02-20 2017-10-03 Mastros Innovations, Llc Lateral plate
US10675071B2 (en) 2016-10-07 2020-06-09 Acumed Llc System and method for bone fixation using a plate straddled by a retainer
US10512547B2 (en) 2017-05-04 2019-12-24 Neurostructures, Inc. Interbody spacer
US10980641B2 (en) 2017-05-04 2021-04-20 Neurostructures, Inc. Interbody spacer
US11076892B2 (en) 2018-08-03 2021-08-03 Neurostructures, Inc. Anterior cervical plate
US11071629B2 (en) 2018-10-13 2021-07-27 Neurostructures Inc. Interbody spacer
US11382761B2 (en) 2020-04-11 2022-07-12 Neurostructures, Inc. Expandable interbody spacer
US11304817B2 (en) 2020-06-05 2022-04-19 Neurostructures, Inc. Expandable interbody spacer
US11717419B2 (en) 2020-12-10 2023-08-08 Neurostructures, Inc. Expandable interbody spacer

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