US20150005824A1 - Ratcheted spinal devices - Google Patents

Ratcheted spinal devices Download PDF

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Publication number
US20150005824A1
US20150005824A1 US14/370,963 US201314370963A US2015005824A1 US 20150005824 A1 US20150005824 A1 US 20150005824A1 US 201314370963 A US201314370963 A US 201314370963A US 2015005824 A1 US2015005824 A1 US 2015005824A1
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US
United States
Prior art keywords
length
variable
spinal
ratchet mechanism
length member
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.)
Abandoned
Application number
US14/370,963
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English (en)
Inventor
Uri Arnin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Apifix Ltd
Original Assignee
Apifix Ltd
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 Apifix Ltd filed Critical Apifix Ltd
Priority to US14/370,963 priority Critical patent/US20150005824A1/en
Assigned to APIFIX LTD. reassignment APIFIX LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ARNIN, URI
Publication of US20150005824A1 publication Critical patent/US20150005824A1/en
Priority to US16/989,263 priority patent/USRE49138E1/en
Abandoned legal-status Critical Current

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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
    • A61B17/7014—Longitudinal elements, e.g. rods with means for adjusting the distance between two 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
    • A61B17/02—Surgical instruments, devices or methods, e.g. tourniquets for holding wounds open; Tractors
    • 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
    • A61B17/7074—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling
    • A61B17/7076—Tools specially adapted for spinal fixation operations other than for bone removal or filler handling for driving, positioning or assembling spinal clamps or bone anchors specially adapted for spinal fixation
    • 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
    • A61F2/4425—Intervertebral or spinal discs, e.g. resilient made of articulated components
    • 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
    • A61F2/4455—Joints for the spine, e.g. vertebrae, spinal discs for the fusion of spinal bodies, e.g. intervertebral fusion of adjacent spinal bodies, e.g. fusion cages
    • 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

Definitions

  • the present invention relates generally to spinal implants and prostheses, and particularly to spinal implants having ratchet mechanisms, such as a spinal implant with joints that permit movement in different degrees of freedom, or a spinal implant with a force applicator to control a ratchet mechanism.
  • ratchet mechanisms such as a spinal implant with joints that permit movement in different degrees of freedom, or a spinal implant with a force applicator to control a ratchet mechanism.
  • Scoliosis is a spinal deformity affecting many people.
  • Current surgical treatment involves affixing long fusion rods to the spine by pedicle screws.
  • the rod system is intended to force the deformed spine into a more healthy position.
  • Other spinal disorders which are often treated by fusion include hyperkyphosis and hyperlordosis.
  • PCT Patent Application PCT/US2011/035278 of the same inventor describes improved spinal devices that can be lengthened or shortened using a ratchet mechanism.
  • the devices have a variable-length member that can be connected to standard pedicle screws as well as to other spinal rods, using appropriate connectors.
  • the present invention seeks to provide further improved spinal devices.
  • the spinal device is in the form of a spinal rod (the term rod, or rod assembly, refers to one or more elongate components that together function as a rod and which do not necessarily have a cylindrical shape but can also be bars and other shapes) that can be lengthened or shortened using a ratchet mechanism.
  • the rod is a variable-length member that can be connected to standard pedicle screws as well as to other spinal rods, using appropriate connectors.
  • the variable-length member can also be directly connected to, or be supported by, bony elements of the spine.
  • Ratchet mechanism active and the variable-length member (rod) can change in length (extend or contract) in one direction.
  • Ratchet mechanism not active and the variable-length member can move in opposite directions corresponding to the extending and contracting directions.
  • the selection of these configurations can be done by rotating an internal element of the assembly.
  • the rotation of the internal element can be done using a worm gear mechanism.
  • the worm gear can be activated by a shaft, through a percutaneous procedure or by an implantable mechanism such as an electric motor, magnet arrangement or other means known to those skilled in the art.
  • variable-length member can have two portions with different rigidity.
  • the variable-length member can have a flexible portion (e.g., when the ratchet is built such that the rod can be only shortened) like a flexible cable, a rope, a flexible mechanical joint and other means known to those skilled in the art.
  • FIG. 3 is a simplified illustration of a force applicator that can adjust or advance the ratchet mechanism of the ratcheted spinal device of FIG. 1 ;
  • FIG. 5 is a simplified top view illustration of one preferred embodiment of the connector assembly, in accordance with an embodiment of the present invention.
  • FIG. 6B is a simplified cross-sectional illustration of a modified version of the embodiment of FIG. 5 .
  • the ratcheted spinal device 10 includes a variable-length member 12 .
  • the variable-length member 12 is a rod.
  • the term “rod” encompasses any slender element of any size and cross-sectional shape, such as but not limited to, a rod, bar, wire and the like.
  • spinal device 10 includes a ratchet mechanism 14 ( FIG. 2 ), which has an operative configuration that allows a change in length of variable-length member 12 in one direction and prevents a change in length of the variable-length member 12 in an opposite direction.
  • Ratchet mechanism 14 has ratchet teeth 16 ( FIG. 3 ; also called ratchet rack 16 ) formed along an axial portion of variable-length member 12 , and a pawl 18 ( FIGS. 2-3 ) arranged to catch on one of the teeth 16 .
  • Pawl 18 extends from a controller element 20 ( FIG. 2 ) mounted about a pivot 22 ( FIG. 2 ) and provided with an eccentric cam 24 ( FIGS. 2-3 ).
  • spinal device 10 includes a force applicator 40 to control ratchet mechanism 14 .
  • Force applicator 40 includes, without limitation, a cam 42 which has a tooth 44 ( FIG. 3 ).
  • the head 46 of cam 42 is shown in FIG. 2 (e.g., hexagonal head); head 46 is not shown for simplicity in FIG. 3 .
  • a suitable tool such as a wrench (not shown)
  • the tooth 44 of cam 42 forcefully moves ratchet rack 16 (upwards in the sense of FIG.
  • FIG. 4 illustrates a spinal device 50 , in accordance with an embodiment of the present invention.
  • spinal device 50 includes two rod assemblies 52 that are connected between three vertebrae 49 with three bone screws 54 .
  • the rod assemblies 52 may be constructed, without limitation, as ratcheted spinal devices 10 or other spinal devices.
  • Connector assemblies 56 form jointed connections between rod assemblies 52 .
  • Connector assemblies 56 permit multiple degree-of-freedom movement of rod assemblies 52 (e.g., variable-length members 12 ), as will be explained below.
  • any number of vertebrae can be selected, since the design of the system is modular. It is also noted that the middle jointed connection of the two rod assemblies 52 does not have to be connected to any vertebra, meaning one or more vertebrae can be skipped, depending on the application. In the drawing figure, bone screws 54 are inserted in the pedicles, but other insertion locations can be used.
  • FIGS. 5 and 6A illustrate one preferred embodiment of the connector assembly 56 , in accordance with an embodiment of the present invention.
  • Connector assembly 56 includes a bolt 58 (e.g., a central threaded bolt) having a head 60 , and which passes through a hole formed in a first hinge member 62 and a second hinge member 64 , which may lie on top of, or be adjacent to, first hinge member 62 .
  • Each hinge member is formed with a receiver 66 ( FIG. 6A ) for receiving therein a pivot pin 68 ( FIG. 5 ).
  • One of the pivot pins 68 is pivotally received in an end 70 of one of the rod assemblies 52
  • the other pivot pin 68 is pivotally received in an end 72 of another of the rod assemblies 52 ( FIG. 5 ).
  • adjacent rod assemblies 52 can pivot with respect to one another by means of connector assembly 56 .

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Neurology (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Cardiology (AREA)
  • Transplantation (AREA)
  • Vascular Medicine (AREA)
  • Surgical Instruments (AREA)
  • Prostheses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Steroid Compounds (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
US14/370,963 2012-01-09 2013-01-07 Ratcheted spinal devices Abandoned US20150005824A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US14/370,963 US20150005824A1 (en) 2012-01-09 2013-01-07 Ratcheted spinal devices
US16/989,263 USRE49138E1 (en) 2012-01-09 2020-08-10 Ratcheted spinal devices

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US201261631667P 2012-01-09 2012-01-09
US201261690835P 2012-07-06 2012-07-06
US201261743418P 2012-09-04 2012-09-04
PCT/US2013/020453 WO2013106262A2 (en) 2012-01-09 2013-01-07 Ratcheted spinal devices
US14/370,963 US20150005824A1 (en) 2012-01-09 2013-01-07 Ratcheted spinal devices

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2013/020453 A-371-Of-International WO2013106262A2 (en) 2012-01-09 2013-01-07 Ratcheted spinal devices

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/394,855 Continuation US9980751B2 (en) 2012-01-09 2016-12-30 Ratcheted spinal devices

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US20150005824A1 true US20150005824A1 (en) 2015-01-01

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Family Applications (3)

Application Number Title Priority Date Filing Date
US14/370,964 Active 2033-11-04 US9622786B2 (en) 2012-01-09 2013-01-07 Spinal cage
US14/370,963 Abandoned US20150005824A1 (en) 2012-01-09 2013-01-07 Ratcheted spinal devices
US16/989,263 Active USRE49138E1 (en) 2012-01-09 2020-08-10 Ratcheted spinal devices

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US14/370,964 Active 2033-11-04 US9622786B2 (en) 2012-01-09 2013-01-07 Spinal cage

Family Applications After (1)

Application Number Title Priority Date Filing Date
US16/989,263 Active USRE49138E1 (en) 2012-01-09 2020-08-10 Ratcheted spinal devices

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US (3) US9622786B2 (es)
EP (2) EP2802295B1 (es)
JP (2) JP6188722B2 (es)
KR (2) KR101998142B1 (es)
CN (2) CN104271079B (es)
AU (2) AU2013208283B2 (es)
BR (2) BR112014016862B1 (es)
CA (2) CA2862827C (es)
ES (2) ES2623041T3 (es)
MX (2) MX348150B (es)
RU (2) RU2615904C2 (es)
WO (2) WO2013106263A2 (es)

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Cited By (3)

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Publication number Priority date Publication date Assignee Title
US9931138B2 (en) * 2014-10-15 2018-04-03 Globus Medical, Inc. Orthopedic extendable rods
US20170265900A1 (en) * 2016-03-16 2017-09-21 Chang Gung Memorial Hospital,Linkou Spine correction apparatus
US10441320B2 (en) * 2016-03-16 2019-10-15 Chang Gung Memorial Hospital, Linkou Spine correction apparatus

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BR112014016878A2 (pt) 2020-02-04
AU2013208283A1 (en) 2014-08-28
CN104271079B (zh) 2015-12-02
ES2623041T3 (es) 2017-07-10
BR112014016862A2 (pt) 2020-03-03
CA2862828A1 (en) 2013-07-18
JP2015506233A (ja) 2015-03-02
JP6141325B2 (ja) 2017-06-07
RU2014132755A (ru) 2016-02-27
EP2802295B1 (en) 2017-02-22
EP2802296B1 (en) 2017-03-22
US20140330387A1 (en) 2014-11-06
CA2862827C (en) 2019-03-19
MX2014008290A (es) 2015-03-06
MX2014008291A (es) 2015-04-10
RU2014132756A (ru) 2016-02-27
CN104271079A (zh) 2015-01-07
BR112014016878B1 (pt) 2021-08-31
BR112014016862B1 (pt) 2021-08-24
WO2013106262A2 (en) 2013-07-18
AU2013208282B2 (en) 2017-04-06
AU2013208283B2 (en) 2017-04-06
KR20140133812A (ko) 2014-11-20
RU2615904C2 (ru) 2017-04-11
MX348150B (es) 2017-05-30
US9622786B2 (en) 2017-04-18
MX349906B (es) 2017-08-18
KR101998142B1 (ko) 2019-07-09
KR101998141B1 (ko) 2019-07-09
RU2615666C2 (ru) 2017-04-06
JP6188722B2 (ja) 2017-08-30
BR112014016862A8 (pt) 2017-07-04
JP2015506232A (ja) 2015-03-02
BR112014016878A8 (pt) 2017-07-04
CA2862827A1 (en) 2013-07-18
CN104135970B (zh) 2016-08-24
AU2013208282A1 (en) 2014-08-28
USRE49138E1 (en) 2022-07-19
ES2624843T3 (es) 2017-07-17
CN104135970A (zh) 2014-11-05
WO2013106263A2 (en) 2013-07-18
EP2802296A2 (en) 2014-11-19
KR20140120888A (ko) 2014-10-14
EP2802295A2 (en) 2014-11-19
WO2013106262A3 (en) 2013-11-14
WO2013106263A3 (en) 2013-11-07
CA2862828C (en) 2019-03-19

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